Dubai Corporation for Ambulance Services (DCAS) Exam — Questions and Answers

Question 1: The correct depth of insertion for a nasopharyngeal airway (NPA) approximates:

Distance from the tip of the nose to the earlobe (7-9cm in most adults) (Correct answer)
Determined solely by resistance during insertion
5cm universally
10cm for all adults

Correct answer: Distance from the tip of the nose to the earlobe (7-9cm in most adults)

The NPA is sized by measuring from the nostril to the tragus of the ear (approximately 7-9cm in adults), ensuring the tube reaches the posterior pharynx without entering the larynx or oesophagus.

Question 2: The ACLS algorithm for stable monomorphic ventricular tachycardia with a pulse includes:

Defibrillation at 200J
Amiodarone 150mg IV infusion over 10 minutes, or synchronised cardioversion (Correct answer)
Adenosine 6mg IV rapid push
Atropine 0.5mg IV

Correct answer: Amiodarone 150mg IV infusion over 10 minutes, or synchronised cardioversion

Stable monomorphic VT with a pulse can be treated pharmacologically with amiodarone (or procainamide/lidocaine), or electively cardioverted if pharmacological therapy fails or is not preferred.

Question 3: Paediatric hypotension (systolic BP below lower limit of normal) is estimated using the formula:

Lower limit SBP = 70 + (2 × age in years) for children 1-10 years (Correct answer)
Lower limit SBP = 90 mmHg for all children
Lower limit SBP = 60 mmHg for infants, 80 mmHg for children
Lower limit SBP = 100 mmHg minus age in years

Correct answer: Lower limit SBP = 70 + (2 × age in years) for children 1-10 years

The formula 70 + (2 × age in years) estimates the lower limit of normal systolic BP for children aged 1-10; values below this indicate hypotension requiring urgent intervention.

Question 4: Burns are classified by depth; a full-thickness (third-degree) burn is characterised by:

Blistering with extreme sensitivity to touch
Superficial redness without blistering
Painful, blistering, moist red surface
Destruction of all skin layers, white/brown/black leathery appearance, painless due to nerve destruction (Correct answer)

Correct answer: Destruction of all skin layers, white/brown/black leathery appearance, painless due to nerve destruction

Full-thickness burns destroy the epidermis, dermis, and subcutaneous structures, appearing as dry, leathery, white/brown/black, and painless as the nerve endings are destroyed.

Question 5: A patient suddenly loses consciousness, recovers spontaneously within 1-2 minutes, and reports no confusion afterward. Which condition is most likely?

Vasovagal syncope (Correct answer)
Haemorrhagic stroke
Generalised tonic-clonic seizure
Hypoglycaemic episode

Correct answer: Vasovagal syncope

Vasovagal syncope typically presents as a brief, self-resolving loss of consciousness with rapid full recovery and no postictal confusion, distinguishing it from seizure.

Question 6: What special considerations apply to managing drowning incidents in Dubai?

Wait for the water to drain from lungs naturally
Prioritize airway management and rescue breathing, consider C-spine injury, manage hypothermia, and provide early CPR (Correct answer)
Only dry the patient
Only provide towels and warmth

Correct answer: Prioritize airway management and rescue breathing, consider C-spine injury, manage hypothermia, and provide early CPR

Dubai's extensive coastline and pools make drowning common. Management prioritizes airway and ventilation, considers associated cervical spine injury (diving), manages hypothermia, and initiates early CPR for cardiac arrest.

Question 7: Pre-hospital management of an open femur fracture includes:

Antibiotics in the ambulance as the primary treatment
Attempting surgical washout in the field
Haemorrhage control, moist sterile dressing over wound, traction splint if applicable, analgesia, and IV access (Correct answer)
Tight circumferential pressure bandaging that may compromise vascularity

Correct answer: Haemorrhage control, moist sterile dressing over wound, traction splint if applicable, analgesia, and IV access

Open fractures require covering with moist sterile dressings to reduce contamination risk, haemorrhage control, analgesia, IV access, and transport — traction may apply but the wound should not be manipulated.

Question 8: The ACLS algorithm for ventricular fibrillation (VF) calls for defibrillation at which energy level with a biphasic defibrillator?

50 joules initially, doubling with each shock
360 joules for all shocks
200 joules (manufacturer-specific) for the first shock, escalating if needed (Correct answer)
100 joules for all shocks

Correct answer: 200 joules (manufacturer-specific) for the first shock, escalating if needed

Biphasic defibrillators deliver effective shocks at lower energies than monophasic devices; the first shock is typically 200J (or manufacturer-specified dose), with equivalent or higher energy for subsequent shocks.

Question 9: In paediatric CPR, the compression-to-ventilation ratio for a single rescuer is:

5:1
Continuous compressions without ventilation
15:2 (two rescuers: 15:2; single rescuer: 30:2)
30:2 (same as adults) (Correct answer)

Correct answer: 30:2 (same as adults)

A single rescuer uses 30:2; two rescuers (PALS guideline) use 15:2 for children over 1 year, allowing more frequent ventilations given the respiratory cause of most paediatric arrests.

Question 10: Termination of resuscitation (TOR) criteria in out-of-hospital cardiac arrest for paramedics typically include:

Patient age greater than 65 years
Arrest not witnessed, no bystander CPR, no ROSC after 3 analyses, and no shockable rhythm ever (Correct answer)
Any unwitnessed arrest
Arrest duration greater than 10 minutes

Correct answer: Arrest not witnessed, no bystander CPR, no ROSC after 3 analyses, and no shockable rhythm ever

Basic life support TOR rules consider multiple factors: unwitnessed arrest, absence of bystander CPR, failure to achieve ROSC after adequate ALS, and no shockable rhythm — each reducing survival probability to near zero.

Question 11: Salbutamol (albuterol) acts as a bronchodilator by:

Leukotriene receptor antagonism
Alpha receptor stimulation causing vasoconstriction
Selective beta-2 receptor agonism causing bronchial smooth muscle relaxation (Correct answer)
Mast cell stabilisation

Correct answer: Selective beta-2 receptor agonism causing bronchial smooth muscle relaxation

Salbutamol selectively activates beta-2 adrenoceptors in bronchial smooth muscle, activating adenylate cyclase and increasing cAMP, causing relaxation of the bronchial smooth muscle and bronchodilation.

Question 12: Febrile seizures in children are most commonly associated with:

Hypoglycaemia as the primary cause
Meningitis in all cases
Epilepsy as a permanent diagnosis
Rapid temperature rise in children aged 6 months to 5 years with a benign, self-limiting course (Correct answer)

Correct answer: Rapid temperature rise in children aged 6 months to 5 years with a benign, self-limiting course

Simple febrile seizures occur with rapid temperature elevation in young children (peak 18 months-3 years), are typically brief (<15 minutes), generalised, and resolve spontaneously without indicating epilepsy or meningitis.

Question 13: The preferred paediatric uncuffed ETT size formula is:

Age in years + 4
(Age in years / 4) + 4 for internal diameter in millimetres (Correct answer)
Weight in kg / 10
Fixed size 4.0mm for all children under 8

Correct answer: (Age in years / 4) + 4 for internal diameter in millimetres

The standard formula (age/4 + 4) estimates uncuffed ETT size for children; cuffed tubes are now acceptable in pre-hospital settings with lower sizing formula (age/4 + 3.5), using cuff pressures ≤20-25 cmH2O.

Question 14: Sodium bicarbonate 8.4% IV is used in which pre-hospital toxicological emergency?

Cocaine overdose
All cases of metabolic acidosis
Organophosphate poisoning
Tricyclic antidepressant (TCA) overdose with QRS prolongation or hypotension (Correct answer)

Correct answer: Tricyclic antidepressant (TCA) overdose with QRS prolongation or hypotension

In TCA overdose, sodium bicarbonate alkalises the plasma, reducing TCA binding to sodium channels, and provides extra sodium to overcome cardiac sodium channel blockade, shortening QRS duration and improving haemodynamics.

Question 15: Dextrose 10% (rather than 50%) is recommended for treating hypoglycaemia in adults because:

50% dextrose raises blood glucose faster
Lower concentration reduces the risk of tissue necrosis from extravasation and is safer in IV administration (Correct answer)
10% dextrose has higher caloric content
50% dextrose is not available in the UAE

Correct answer: Lower concentration reduces the risk of tissue necrosis from extravasation and is safer in IV administration

Dextrose 50% is highly hyperosmolar and causes severe tissue necrosis if extravasated; 10% dextrose (still effective) is much safer if the IV line is not patent, requiring a larger volume but reducing complication risk.

Question 16: What is pulseless ventricular tachycardia (pVT) and how should DCAS paramedics manage it?

A normal rhythm variation requiring observation
A slow heart rhythm treated with atropine
A rapid ventricular rhythm without a pulse, treated with immediate defibrillation and CPR (Correct answer)
A rhythm only found in children

Correct answer: A rapid ventricular rhythm without a pulse, treated with immediate defibrillation and CPR

Pulseless VT is a rapid, organized ventricular rhythm that does not produce effective cardiac output. It is a shockable rhythm treated with immediate defibrillation followed by CPR, similar to ventricular fibrillation.

Question 17: The 'Lethal Triad' in trauma refers to:

Hypothermia, acidosis, and coagulopathy — three mutually reinforcing killers in haemorrhagic shock (Correct answer)
Tachycardia, hypotension, and anaemia
Head injury, chest injury, and abdominal injury
Hypotension, hypoxia, and hyponatraemia

Correct answer: Hypothermia, acidosis, and coagulopathy — three mutually reinforcing killers in haemorrhagic shock

The lethal triad: hypothermia (impairs clotting and cardiac function), acidosis (from tissue hypoperfusion), and coagulopathy (failure of clotting mechanisms) — each worsens the others in a deadly cycle.

Question 18: Ondansetron is used in pre-hospital care to treat:

Seizures
Hypotension
Nausea and vomiting — serotonin (5-HT3) receptor antagonist, preferred as it does not cause sedation (Correct answer)
Anaphylaxis

Correct answer: Nausea and vomiting — serotonin (5-HT3) receptor antagonist, preferred as it does not cause sedation

Ondansetron blocks 5-HT3 receptors in the CNS and GI tract, providing effective anti-emetic action without the sedation or extrapyramidal side effects of older anti-emetics like metoclopramide or prochlorperazine.

Question 19: The pre-hospital management of suspected tension pneumothorax includes:

Positioning the patient upright and monitoring only
Positive pressure ventilation without decompression
Needle thoracostomy at the 2nd intercostal space, midclavicular line (Correct answer)
Bilateral chest tube insertion

Correct answer: Needle thoracostomy at the 2nd intercostal space, midclavicular line

Tension pneumothorax is immediately life-threatening and requires emergency needle thoracostomy (or finger thoracostomy in ventilated patients) to decompress the pleural space before formal chest tube insertion.

Question 20: Tourniquet application for extremity haemorrhage should be placed:

Over a joint for best compression
Directly over the wound
At the most distal point of the limb
5-8cm proximal to the wound on the mid-shaft of the affected limb (Correct answer)

Correct answer: 5-8cm proximal to the wound on the mid-shaft of the affected limb

Tourniquets are applied 5-8cm proximal to the wound, mid-shaft (not over a joint), tightened until bleeding stops, time documented, and left in place until surgical haemostasis in hospital.

Question 21: Enoxaparin (low molecular weight heparin) differs from unfractionated heparin in that it:

Cannot be used in ACS
Has a longer half-life requiring reversal
Has more predictable pharmacokinetics allowing subcutaneous dosing without laboratory monitoring (Correct answer)
Requires aPTT monitoring for dosing

Correct answer: Has more predictable pharmacokinetics allowing subcutaneous dosing without laboratory monitoring

LMWH has more predictable dose-response (consistent bioavailability), allowing weight-based SC dosing without aPTT monitoring, making it more practical and safer than UFH in outpatient and pre-hospital settings.

Question 22: The 'DCAS dispatch priority system' categorises emergency calls into which primary tiers?

Priority 1 (life-threatening/lights and sirens), Priority 2 (urgent but stable), Priority 3 (non-urgent/routine) (Correct answer)
Alpha, Bravo, Charlie, Delta, Echo
Red, Amber, Green, White
Critical, High, Medium, Low, Zero

Correct answer: Priority 1 (life-threatening/lights and sirens), Priority 2 (urgent but stable), Priority 3 (non-urgent/routine)

DCAS uses a priority dispatch system categorising calls by severity to allocate appropriate resources and response times: P1 for immediately life-threatening emergencies, P2 for urgent, and P3 for routine calls.

Question 23: Neonatal resuscitation initial steps immediately after birth include:

Epinephrine IM as the initial drug
Chest compressions before ventilation assessment
Warmth, drying and stimulation, airway positioning — before checking heart rate (Correct answer)
Intubation as the first step

Correct answer: Warmth, drying and stimulation, airway positioning — before checking heart rate

NRP initial steps: warmth (warm environment, drying), stimulation (rubbing the back and feet), airway positioning (slight neck extension, sniffing position), and suction if needed — prior to any assessment or intervention.

Question 24: A GCS score of 8 or less indicates the need for:

Rapid transport without airway intervention
Supplemental oxygen via non-rebreather mask only
IV fluid administration only
Definitive airway management (intubation) (Correct answer)

Correct answer: Definitive airway management (intubation)

A GCS of 8 or less indicates severe neurological compromise with inadequate protective airway reflexes, requiring definitive airway management — typically endotracheal intubation — to secure and protect the airway.

Question 25: In ACLS, 'no-flow time' refers to:

The interval between cardiac arrest and initiation of CPR (time without any perfusion) (Correct answer)
Total duration of resuscitation
Time without defibrillation
Duration of poor-quality CPR

Correct answer: The interval between cardiac arrest and initiation of CPR (time without any perfusion)

No-flow time is the critical period between cardiac arrest and first CPR compression during which no cardiac output occurs; minimising this time is the single most important factor in improving OHCA survival.

Question 26: Succinylcholine (suxamethonium) as an RSI agent is contraindicated in:

Patients with asthma
All trauma patients
Hyperkalaemia, crush injuries, burns >24 hours old, and known or suspected pseudocholinesterase deficiency (Correct answer)
Patients receiving beta-blockers

Correct answer: Hyperkalaemia, crush injuries, burns >24 hours old, and known or suspected pseudocholinesterase deficiency

Succinylcholine causes potassium release (∼0.5mEq/L normally); in hyperkalaemic states, or conditions with upregulated acetylcholine receptors (burns, crush, denervation), this can cause fatal cardiac arrest.

Question 27: What is the recommended energy level for the first defibrillation shock in adult cardiac arrest using a biphasic defibrillator?

400 joules
120-200 joules depending on manufacturer (Correct answer)
20 joules
50 joules

Correct answer: 120-200 joules depending on manufacturer

DCAS protocols align with international guidelines recommending initial biphasic defibrillation at the manufacturer's recommended dose, typically 120-200 joules for the first shock.

Question 28: Adequate pre-oxygenation before RSI aims to achieve a SpO2 of:

100% (or as close as possible) on high-flow oxygen for at least 3 minutes to maximise oxygen reserve (Correct answer)
90% is sufficient
70% is acceptable in emergency RSI
Pre-oxygenation is not required in emergency airway management

Correct answer: 100% (or as close as possible) on high-flow oxygen for at least 3 minutes to maximise oxygen reserve

Pre-oxygenation denitrogenates the functional residual capacity, extending the apnoea time (safe apnoea period) before desaturation; achieving SpO2 100% maximises the oxygen reserve available during the intubation attempt.

Question 29: The classic Cushing's Triad, indicating raised intracranial pressure, consists of:

Hypotension, bradycardia, and fever
Hypertension (wide pulse pressure), bradycardia, and irregular respirations (Correct answer)
Hypertension, tachycardia, and apnoea
Hypotension, tachycardia, and tachypnoea

Correct answer: Hypertension (wide pulse pressure), bradycardia, and irregular respirations

Cushing's Triad is a late, ominous sign of severely raised ICP causing brainstem compression: hypertension with widened pulse pressure, reflex bradycardia, and irregular (Cheyne-Stokes) respirations — indicating imminent herniation.

Question 30: After intubation, the ETT should be secured to prevent:

Displacement (accidental extubation), right main bronchus migration, or oesophageal tube movement (Correct answer)
The patient from biting the tube
Movement of the tube from one hand to another
Only accidental extubation during transport

Correct answer: Displacement (accidental extubation), right main bronchus migration, or oesophageal tube movement

ETT security prevents tube displacement — accidental extubation (most dangerous), migration down the right main bronchus (causes single-lung ventilation), or oesophageal entry if the tube was not securely verified.

Question 31: What infection prevention measures must DCAS paramedics follow?

No specific measures are required
Standard precautions including PPE, hand hygiene, sharps disposal, equipment decontamination, and clinical waste management (Correct answer)
Only wearing gloves
Only hand washing after patient contact

Correct answer: Standard precautions including PPE, hand hygiene, sharps disposal, equipment decontamination, and clinical waste management

DCAS infection prevention includes universal standard precautions: appropriate PPE (gloves, masks, eye protection), hand hygiene before and after contact, safe sharps disposal, equipment cleaning, and proper clinical waste management.

Question 32: The 'Scene Safety' principle requires paramedics to:

Consider scene safety only in violent incidents
Approach the patient immediately to begin treatment
Ensure the scene is safe for themselves, their crew, bystanders, and patients before approaching (Correct answer)
Call for backup before assessing scene safety

Correct answer: Ensure the scene is safe for themselves, their crew, bystanders, and patients before approaching

Paramedics must assess scene safety before approaching, as an injured rescuer becomes a second patient — standard personal protective equipment, hazard identification, and situational awareness are mandatory.

Question 33: What is the primary purpose of the primary survey in emergency medical assessment according to Dubai Corporation for Ambulance Services (DCAS) protocols?

To determine the hospital destination
To obtain patient demographics
To complete insurance documentation
To identify and treat immediately life-threatening conditions using the ABCDE approach (Correct answer)

Correct answer: To identify and treat immediately life-threatening conditions using the ABCDE approach

The primary survey uses the ABCDE (Airway, Breathing, Circulation, Disability, Exposure) approach to systematically identify and manage life-threatening conditions before proceeding to secondary assessment.

Question 34: What is the first shockable rhythm a DCAS paramedic should identify on a cardiac monitor?

Asystole
Pulseless electrical activity (PEA)
Ventricular fibrillation (VF) (Correct answer)
Normal sinus rhythm

Correct answer: Ventricular fibrillation (VF)

Ventricular fibrillation (VF) is a chaotic, disorganized cardiac rhythm that is shockable. Identifying VF quickly allows paramedics to deliver defibrillation, which is the primary treatment.

Question 35: In the trauma patient, haemothorax is suspected when:

Absent breath sounds, dull percussion, and signs of hypovolaemic shock after chest trauma (Correct answer)
Tracheal deviation away from the affected side
Absent breath sounds and hyper-resonance to percussion
Normal breath sounds with pleuritic chest pain

Correct answer: Absent breath sounds, dull percussion, and signs of hypovolaemic shock after chest trauma

Haemothorax presents with decreased/absent breath sounds and dullness to percussion (blood in pleural space) combined with signs of haemodynamic compromise; tracheal deviation occurs in tension pneumothorax, not simple haemothorax.

Question 36: Which type of stroke is caused by a ruptured blood vessel in the brain?

Embolic stroke
Haemorrhagic stroke (Correct answer)
Thrombotic stroke
Ischaemic stroke

Correct answer: Haemorrhagic stroke

A haemorrhagic stroke results from rupture of a cerebral blood vessel, causing bleeding into or around the brain tissue.

Question 37: First-line medication for status epilepticus in the pre-hospital setting is:

Phenobarbitone IM
Phenytoin IV as first-line
Benzodiazepines — midazolam IM/buccal/intranasal, or diazepam rectal (Correct answer)
Levetiracetam IV only in hospital

Correct answer: Benzodiazepines — midazolam IM/buccal/intranasal, or diazepam rectal

Benzodiazepines are first-line for status epilepticus; midazolam (IM, buccal, or intranasal) is preferred pre-hospital as it does not require IV access; diazepam (rectal or IV) is an alternative.

Question 38: What is the significance of the 'chain of survival' concept in DCAS cardiac care?

A hospital discharge checklist
A paramedic training sequence
A sequence of critical actions: early recognition, early CPR, early defibrillation, and early advanced care that maximizes cardiac arrest survival (Correct answer)
A chain used to secure patients during transport

Correct answer: A sequence of critical actions: early recognition, early CPR, early defibrillation, and early advanced care that maximizes cardiac arrest survival

The chain of survival represents the sequence of time-critical interventions — early recognition and activation, early CPR, early defibrillation, and early advanced care — each link of which improves cardiac arrest outcomes.

Question 39: Under Dubai EMS protocols, 'rendezvous' with a medical supervisor (physician) in the field is activated for:

All paediatric calls regardless of severity
All Priority 1 calls
Minor injuries in remote locations
Critical patients requiring physician-level interventions beyond paramedic scope, or complex scene management (Correct answer)

Correct answer: Critical patients requiring physician-level interventions beyond paramedic scope, or complex scene management

Medical supervisors are dispatched to support paramedics for complex or critical cases requiring physician-level decision making or interventions, providing on-scene advanced medical oversight.

Question 40: Traumatic brain injury (TBI) secondary injury is caused by:

Hypoxia, hypotension, hypercapnia, hyperthermia, and seizures after the initial impact (Correct answer)
Oedema that develops months after injury
The initial mechanical impact only
Surgical intervention for haemorrhage evacuation

Correct answer: Hypoxia, hypotension, hypercapnia, hyperthermia, and seizures after the initial impact

Secondary brain injury occurs after the initial impact through preventable physiological insults — hypoxia, hypotension, hypercapnia (vasodilatation increasing ICP), fever, and seizures — all of which paramedics can actively prevent.

Question 41: What is the DCAS protocol for managing stroke patients using the FAST assessment?

Face drooping, Arm weakness, Speech difficulty, Time to call emergency services — rapid identification and transport to stroke center (Correct answer)
Only provide aspirin
Wait for symptoms to resolve
Perform brain surgery in the ambulance

Correct answer: Face drooping, Arm weakness, Speech difficulty, Time to call emergency services — rapid identification and transport to stroke center

DCAS uses the FAST assessment (Face, Arm, Speech, Time) for rapid stroke identification, followed by blood glucose check, noting symptom onset time, and rapid transport to a designated stroke center.

Question 42: STEMI recognition on a 12-lead ECG requires ST elevation of at least:

5mm in the precordial leads only
1mm in two or more contiguous limb leads or 2mm in two or more contiguous precordial leads (Correct answer)
3mm in a single lead
0.5mm in any lead

Correct answer: 1mm in two or more contiguous limb leads or 2mm in two or more contiguous precordial leads

STEMI criteria: ≥1mm ST elevation in two contiguous limb leads or ≥2mm in two contiguous precordial leads (V1-V6), with specific modified criteria for left bundle branch block and posterior MI.

Question 43: What is the DCAS protocol for administering naloxone in suspected opioid overdose?

Administer only orally
Wait for hospital blood test confirmation
Administer 400mcg IV/IM/IN, titrate to restore adequate respirations without full reversal (Correct answer)
Administer 10mg intravenously

Correct answer: Administer 400mcg IV/IM/IN, titrate to restore adequate respirations without full reversal

DCAS protocols recommend naloxone 400mcg administered IV, IM, or intranasally, titrated to restore adequate respiratory function. Full reversal is avoided to prevent acute withdrawal symptoms.

Question 44: Pre-hospital hypothermia prevention in trauma patients includes all of the following EXCEPT:

Active cooling with ice packs to prevent fever (Correct answer)
Covering with blankets and using heat retention wrapping
Removing wet clothing and drying the patient
Warm intravenous fluids

Correct answer: Active cooling with ice packs to prevent fever

Hypothermia prevention involves removing wet clothing, warming IV fluids, covering with insulating blankets, and warming the ambulance environment; ice packs would cause or worsen hypothermia and are contraindicated in trauma.

Question 45: How should DCAS paramedics manage poisoning and overdose cases?

Identify the substance if possible, maintain airway, administer specific antidotes if available, and contact the poison control center (Correct answer)
Only provide water to dilute the poison
Wait for symptoms to develop before treatment
Induce vomiting in all cases

Correct answer: Identify the substance if possible, maintain airway, administer specific antidotes if available, and contact the poison control center

Poisoning management includes substance identification, airway protection, administering specific antidotes when available (naloxone for opioids, atropine for organophosphates), and consultation with the poison control center.

Question 46: Adenosine is used to treat which arrhythmia?

Ventricular fibrillation
Atrial fibrillation with rapid ventricular rate
Stable narrow-complex supraventricular tachycardia (SVT) with regular rhythm (Correct answer)
Ventricular tachycardia with pulse

Correct answer: Stable narrow-complex supraventricular tachycardia (SVT) with regular rhythm

Adenosine transiently blocks the AV node, terminating re-entry SVTs; its extremely short half-life (10 seconds) makes it safe even if the diagnosis is uncertain — it will terminate AV-nodal-dependent arrhythmias or cause diagnostic slowing.

Question 47: The DCAS 'Code Blue' designation in hospital handover refers to:

Major trauma patient
Paediatric emergency
Cardiac or respiratory arrest — requiring immediate resuscitation team response on arrival (Correct answer)
Obstetric emergency

Correct answer: Cardiac or respiratory arrest — requiring immediate resuscitation team response on arrival

Code Blue is the universal hospital designation for cardiac or respiratory arrest; DCAS paramedics use this code in pre-arrival notification to activate the resuscitation team before the patient reaches the emergency department.

Question 48: What is the DCAS approach to managing patients with mental health emergencies?

Only transport to police station
Conduct safety assessment, use de-escalation techniques, assess for medical causes, and consider appropriate pharmacological sedation if needed (Correct answer)
Mental health is not an ambulance concern
Restrain all mental health patients immediately

Correct answer: Conduct safety assessment, use de-escalation techniques, assess for medical causes, and consider appropriate pharmacological sedation if needed

DCAS mental health emergency management includes scene safety assessment, verbal de-escalation, ruling out medical causes (hypoglycemia, head injury), and using pharmacological sedation only when necessary for safety.

Question 49: Pre-hospital wound packing with haemostatic dressings (e.g., Combat Gauze) is indicated for:

Wounds that have already stopped bleeding
Junctional haemorrhage (groin, axilla, neck) where tourniquets cannot be applied (Correct answer)
All surface wounds regardless of severity
Minor lacerations that are actively bleeding

Correct answer: Junctional haemorrhage (groin, axilla, neck) where tourniquets cannot be applied

Junctional areas (groin, axillary, and neck) cannot be controlled with conventional tourniquets; haemostatic gauze packed firmly into the wound with direct manual pressure for 3-5 minutes controls these life-threatening bleeds.

Question 50: Which finding after 20 minutes of ALS indicates futility in adult cardiac arrest?

Single rhythm check showing PEA
Heart rate of 20 on monitor
ETCO2 persistently below 10 mmHg throughout CPR despite appropriate management (Correct answer)
ETCO2 of 30 mmHg after 20 minutes

Correct answer: ETCO2 persistently below 10 mmHg throughout CPR despite appropriate management

Persistently low ETCO2 (<10 mmHg) after 20 minutes of CPR indicates inadequate cardiac output despite resuscitation attempts and is associated with near-zero survival, supporting consideration of termination of efforts.

Question 51: The pre-hospital 12-lead ECG transmission to the cardiac catheterisation laboratory is important because:

It documents baseline rhythm for medicolegal purposes only
It enables the cath lab to activate and prepare before the patient arrives, reducing door-to-balloon time (Correct answer)
It replaces the need for in-hospital ECG interpretation
It allows remote physicians to provide definitive STEMI treatment

Correct answer: It enables the cath lab to activate and prepare before the patient arrives, reducing door-to-balloon time

Pre-hospital ECG transmission and 'cath lab activation' protocols allow the interventional cardiology team to be ready before patient arrival, reducing the total ischaemic time (first medical contact to balloon) in STEMI.

Question 52: Crush syndrome occurs when compressed muscle releases:

Fibrinogen causing hypercoagulability
Insulin into the bloodstream
Acetylcholine causing bronchospasm
Myoglobin, potassium, and other breakdown products into circulation, causing renal failure and cardiac arrhythmia (Correct answer)

Correct answer: Myoglobin, potassium, and other breakdown products into circulation, causing renal failure and cardiac arrhythmia

Prolonged muscle compression causes rhabdomyolysis; upon release, myoglobin precipitates in renal tubules causing acute kidney injury, while hyperkalaemia from cell breakdown causes life-threatening cardiac arrhythmias.

Question 53: What is the DCAS radio communication protocol for dispatching and reporting?

Communication is handled only by the driver
Use casual language and slang
Use standardized phonetic alphabet, clear codes, structured message format, and maintain professional communication (Correct answer)
Only text messaging is used

Correct answer: Use standardized phonetic alphabet, clear codes, structured message format, and maintain professional communication

DCAS radio communication requires the NATO phonetic alphabet for clarity, standardized codes and terminology, structured message formats for dispatch and status updates, and professional language at all times.

Question 54: What is the DCAS response time target for Category 1 (life-threatening) emergencies?

30 minutes
No specific targets exist
Within 8-12 minutes for life-threatening emergencies in urban Dubai (Correct answer)
Within 1 hour

Correct answer: Within 8-12 minutes for life-threatening emergencies in urban Dubai

DCAS aims for rapid response times for life-threatening emergencies, targeting arrival within 8-12 minutes in urban areas, in line with international ambulance service benchmarks.

Question 55: What is the indication and dosing of aspirin in DCAS chest pain protocols?

500mg intravenously for cardiac arrest
300mg chewed for suspected acute coronary syndrome to inhibit platelet aggregation (Correct answer)
300mg for headache only
100mg swallowed for general pain

Correct answer: 300mg chewed for suspected acute coronary syndrome to inhibit platelet aggregation

Aspirin 300mg chewed (for rapid absorption) is administered for suspected ACS to inhibit platelet aggregation and reduce thrombus formation, unless the patient is allergic or actively bleeding.

Question 56: What is the DCAS protocol for managing patients experiencing allergic reactions?

Wait for allergy testing results
Classify severity (mild/moderate/severe/anaphylaxis), administer appropriate treatment from antihistamines to IM adrenaline, and monitor for biphasic reactions (Correct answer)
Only provide antihistamines
Only remove the allergen

Correct answer: Classify severity (mild/moderate/severe/anaphylaxis), administer appropriate treatment from antihistamines to IM adrenaline, and monitor for biphasic reactions

Allergic reaction management depends on severity: mild reactions may need only antihistamines, while anaphylaxis requires IM adrenaline, IV fluids, and airway management, with monitoring for delayed biphasic reactions.

Question 57: The 'sniffing position' for intubation aligns:

The ETT with the right main bronchus
The patient's chin to the ceiling
The trachea parallel to the floor
The oral, pharyngeal, and laryngeal axes to provide the best laryngoscopic view (Correct answer)

Correct answer: The oral, pharyngeal, and laryngeal axes to provide the best laryngoscopic view

The sniffing position (neck flexed, head extended) aligns the oral-pharyngeal-laryngeal axis, improving the laryngoscopic view of the glottis; a folded towel under the occiput achieves this in most adults.

Question 58: Amiodarone is given in ACLS for shock-refractory VF/pVT at which dose?

150mg IV as the only dose
300mg IV bolus first dose, followed by 150mg if needed (Correct answer)
600mg IV loading dose
1mg/kg IV bolus

Correct answer: 300mg IV bolus first dose, followed by 150mg if needed

Amiodarone 300mg IV is given for VF/pVT that persists after 2-3 defibrillations; a second dose of 150mg can be administered for recurrent or refractory VF/VT.

Question 59: The correct position for hands during adult chest compressions is:

Upper sternum near the clavicles
Lower half of the sternum, heel of hand, with second hand overlapping (Correct answer)
Left of the sternum over the cardiac apex
Xiphisternum (xiphoid process)

Correct answer: Lower half of the sternum, heel of hand, with second hand overlapping

Compressions must be applied to the lower half of the sternum using the heel of the dominant hand with the second hand overlapping, directly compressing the heart between sternum and spine.

Question 60: The correct mask size for a bag-valve-mask (BVM) covers:

From the forehead to below the mandible
From the eyes to the chin
From the nostrils to the upper lip only
From the bridge of the nose to the cleft of the chin, creating an airtight seal (Correct answer)

Correct answer: From the bridge of the nose to the cleft of the chin, creating an airtight seal

The mask must create an airtight seal covering the nose and mouth, from the bridge of the nose above to the groove between lip and chin below, to deliver effective ventilation.

Question 61: Hypertonic saline (3% or 7.5%) in pre-hospital head injury management aims to:

Replace sodium lost through head injury
Reduce cerebral oedema through osmotic gradient — drawing water from brain cells into the vasculature (Correct answer)
Treat electrolyte abnormalities
Raise blood pressure through volume expansion

Correct answer: Reduce cerebral oedema through osmotic gradient — drawing water from brain cells into the vasculature

Hypertonic saline creates an osmotic gradient across the blood-brain barrier, drawing water from swollen brain tissue into the intravascular space, reducing ICP while simultaneously providing intravascular volume.

Question 62: In a paediatric patient, the earliest reliable sign of deteriorating haemodynamic status is:

Decrease in urine output below 0.5ml/kg/hr
Hypotension
Altered mental status
Tachycardia and prolonged capillary refill time (CRT >2 seconds) (Correct answer)

Correct answer: Tachycardia and prolonged capillary refill time (CRT >2 seconds)

Tachycardia and prolonged CRT are the earliest measurable signs of compensated shock in children, preceding hypotension (a late sign) by a considerable margin — allowing earlier intervention if recognised.

Question 63: What is the significance of capillary refill time (CRT) in DCAS patient assessment?

It assesses neurological function
It measures blood oxygen levels
It measures lung function
It indicates peripheral perfusion status; a CRT greater than 2 seconds suggests poor circulation (Correct answer)

Correct answer: It indicates peripheral perfusion status; a CRT greater than 2 seconds suggests poor circulation

CRT is assessed by pressing a fingertip and measuring the time for color to return. A CRT exceeding 2 seconds in adults indicates poor peripheral perfusion, possibly from shock or dehydration.

Question 64: Damage Control Surgery (DCS) focuses on:

Laparoscopic repair of all penetrating abdominal wounds
Complete definitive surgical repair at initial operation regardless of physiological status
Rapid control of haemorrhage and contamination, temporary closure, and ICU resuscitation before definitive repair (Correct answer)
Non-operative management of all abdominal injuries

Correct answer: Rapid control of haemorrhage and contamination, temporary closure, and ICU resuscitation before definitive repair

DCS limits initial surgery to abbreviated haemorrhage and contamination control, then resuscitates the patient in ICU to correct the lethal triad before returning for definitive repair when physiologically optimised.

Question 65: Post-intubation sedation and analgesia in the pre-hospital setting is important because:

Sedation improves haemodynamics in all patients
Sedation reduces the need for monitoring
Paralysis from RSI wears off and an awake, intubated patient will fight the tube and hyperventilate (Correct answer)
All intubated patients require neuromuscular blockade indefinitely

Correct answer: Paralysis from RSI wears off and an awake, intubated patient will fight the tube and hyperventilate

Neuromuscular blockade from succinylcholine wears off in 8-10 minutes; ongoing sedation and analgesia prevent patient awareness, fighting against the tube, self-extubation, and dangerous sympathetic responses.

Question 66: A 'difficult airway' algorithm should include which rescue device if intubation fails?

Immediate transport without airway management
Supraglottic airway (SGA) such as laryngeal mask airway (LMA) or i-gel as a bridge to oxygenation (Correct answer)
Continuing repeated intubation attempts until successful
Immediate cricothyrotomy after the first failed intubation attempt

Correct answer: Supraglottic airway (SGA) such as laryngeal mask airway (LMA) or i-gel as a bridge to oxygenation

Failed intubation should trigger a 'can't intubate, can ventilate' response using an SGA as a rescue device for oxygenation; cricothyrotomy is reserved for 'can't intubate, can't oxygenate' (CICO) scenarios.

Question 67: What is the correct dose and route of adrenaline for adult anaphylaxis according to DCAS protocols?

0.5mg (500mcg) intramuscularly into the anterolateral thigh (Correct answer)
0.1mg subcutaneously
1mg intravenously
2mg orally

Correct answer: 0.5mg (500mcg) intramuscularly into the anterolateral thigh

DCAS protocols specify adrenaline 0.5mg (500mcg) administered intramuscularly into the anterolateral thigh for adult anaphylaxis, as IM provides rapid and reliable absorption.

Question 68: Cardioversion for unstable tachyarrhythmia is performed 'synchronised' meaning:

Two defibrillators are used simultaneously
Energy is matched to the patient's body weight
The shock is delivered at random timing
The shock is delivered on the R wave to avoid inducing VF (Correct answer)

Correct answer: The shock is delivered on the R wave to avoid inducing VF

Synchronised cardioversion delivers the shock on the QRS complex (R wave), avoiding delivery during the vulnerable T wave repolarisation period which could induce ventricular fibrillation.

Question 69: The laryngeal mask airway (LMA) does NOT provide:

An open airway
A conduit for ventilation
Protection against aspiration of gastric contents (Correct answer)
Ability to administer oxygen

Correct answer: Protection against aspiration of gastric contents

The LMA sits in the hypopharynx above the larynx without cuffing the trachea, providing a patent airway and ventilation conduit but offering no protection against regurgitation and aspiration.

Question 70: Dubai's Trauma Centre hierarchy designates which hospital as the primary Level I equivalent trauma centre?

Al Wasl Hospital
Emirates Hospital
Mediclinic City Hospital
Rashid Hospital — designated major trauma centre for Dubai (Correct answer)

Correct answer: Rashid Hospital — designated major trauma centre for Dubai

Rashid Hospital is Dubai's primary major trauma centre with comprehensive surgical, neurosurgical, and specialist trauma capabilities; DCAS protocols direct major trauma patients there for definitive care.

Question 71: Which component is NOT part of the Glasgow Coma Scale (GCS)?

Eye opening
Verbal response
Pupil reactivity (Correct answer)
Motor response

Correct answer: Pupil reactivity

The GCS assesses eye opening, verbal response, and motor response only; pupil reactivity is assessed separately.

Question 72: The management of a conscious infant (under 1 year) with a foreign body causing complete airway obstruction includes:

Blind finger sweeps of the mouth
Abdominal thrusts (Heimlich manoeuvre) as in adults
Blind suctioning of the pharynx
5 back blows followed by 5 chest thrusts — repeated until the object is dislodged or infant becomes unconscious (Correct answer)

Correct answer: 5 back blows followed by 5 chest thrusts — repeated until the object is dislodged or infant becomes unconscious

The Heimlich manoeuvre (abdominal thrusts) is NOT used in infants — it risks abdominal organ injury; instead, alternating cycles of 5 back blows and 5 chest thrusts are used to dislodge the foreign body.

Question 73: Bronchiolitis in infants is most commonly caused by:

Streptococcus pneumoniae
Respiratory Syncytial Virus (RSV) (Correct answer)
COVID-19 in all cases
Influenza virus

Correct answer: Respiratory Syncytial Virus (RSV)

RSV is responsible for the majority of bronchiolitis cases in infants, causing lower respiratory tract inflammation, wheeze, and hyperinflation; the disease peaks in winter and can cause severe respiratory failure in young infants.

Question 74: Post-ROSC, the target systolic blood pressure in ACLS post-cardiac arrest care is:

Normal BP is not a target — focus only on oxygenation
Below 80 mmHg to reduce myocardial oxygen demand
At least 90 mmHg systolic (or MAP ≥65 mmHg) (Correct answer)
180-200 mmHg to improve cerebral perfusion

Correct answer: At least 90 mmHg systolic (or MAP ≥65 mmHg)

Post-ROSC haemodynamic goals include SBP ≥90 mmHg or MAP ≥65 mmHg to ensure adequate organ perfusion; vasopressors (norepinephrine) and IV fluids are used to achieve and maintain these targets.

Question 75: Intraosseous epinephrine during cardiac arrest should be followed by:

No flush — IO delivers drugs directly to central circulation
5-10ml normal saline flush to move drug from the IO into central circulation (Correct answer)
A second dose of epinephrine without waiting
IV access establishment before any drug is effective

Correct answer: 5-10ml normal saline flush to move drug from the IO into central circulation

IO medications require a saline flush to move drug from the relatively slow IO uptake into the central venous circulation rapidly — ensuring the drug reaches the heart in a therapeutically effective bolus.

Question 76: A patient with suspected central vertigo (rather than benign peripheral vertigo) would most likely present with which additional finding?

Diplopia, dysarthria, or limb ataxia (Correct answer)
Positive Dix-Hallpike test that fatigues with repetition
Tinnitus and unilateral hearing loss only
Nausea and vomiting in isolation

Correct answer: Diplopia, dysarthria, or limb ataxia

Central vertigo (e.g., posterior fossa stroke or tumour) is distinguished by associated brainstem signs such as diplopia, dysarthria, dysphagia, or limb ataxia, which are absent in peripheral (inner ear) vertigo.

Question 77: An end-tidal CO2 reading of 20 mmHg in a breathing, non-arrested patient after intubation suggests:

Oesophageal intubation (or extreme hyperventilation) — verify tube position immediately (Correct answer)
Correct tracheal intubation with mild hyperventilation
Normal ventilation in a paediatric patient
Cardiac arrest with poor CPR quality

Correct answer: Oesophageal intubation (or extreme hyperventilation) — verify tube position immediately

A very low ETCO2 of 20 mmHg in a breathing patient most likely indicates oesophageal intubation (where CO2 from a few gastric CO2 washes out rapidly) and must be immediately evaluated with laryngoscopy.

Question 78: What is the DCAS approach to managing diabetic emergencies?

Always administer insulin
Check blood glucose level, treat hypoglycemia with glucose/dextrose, manage DKA with IV fluids, and transport for definitive care (Correct answer)
Only provide oral fluids
Diabetes emergencies do not require ambulance care

Correct answer: Check blood glucose level, treat hypoglycemia with glucose/dextrose, manage DKA with IV fluids, and transport for definitive care

DCAS diabetic emergency management begins with blood glucose assessment: hypoglycemia is treated with glucose administration, while diabetic ketoacidosis (DKA) requires IV fluid resuscitation and rapid transport for insulin therapy.

Question 79: The 'Hs and Ts' of cardiac arrest represent potentially reversible causes. Which is an 'H'?

Tension pneumothorax
Hypovolaemia (Correct answer)
Tamponade (cardiac)
Thrombosis (pulmonary embolism)

Correct answer: Hypovolaemia

The Hs are: Hypovolaemia, Hypoxia, Hydrogen ion excess (acidosis), Hypo/hyperkalaemia, and Hypothermia. The Ts are: Tension pneumothorax, Tamponade, Toxins, and Thrombosis (PE or coronary).

Question 80: Which medication is the first-line treatment for suspected opioid overdose with respiratory depression in the pre-hospital setting?

Naloxone (Narcan) — opioid antagonist (Correct answer)
Activated charcoal
Flumazenil — benzodiazepine antagonist
Epinephrine 1:1000 IM

Correct answer: Naloxone (Narcan) — opioid antagonist

Naloxone competitively antagonises opioid receptors, rapidly reversing respiratory depression, sedation, and miosis caused by opioid overdose; multiple doses may be needed for long-acting opioids.

Question 81: Epinephrine dosing in ACLS cardiac arrest is:

2mg IV once only
0.5mg IV every 10 minutes
1mg IV every 3-5 minutes (Correct answer)
1mg IV every minute until ROSC

Correct answer: 1mg IV every 3-5 minutes

Epinephrine 1mg IV/IO is administered every 3-5 minutes during cardiac arrest; it increases coronary and cerebral perfusion pressure through peripheral vasoconstriction, improving the probability of ROSC.

Question 82: Which clinical feature helps differentiate Bell's palsy from a stroke-related facial palsy?

Inability to wrinkle the forehead on the affected side in stroke
Drooling of saliva
Ability to wrinkle the forehead on the affected side in stroke (Correct answer)
Facial palsy on the left side only

Correct answer: Ability to wrinkle the forehead on the affected side in stroke

In a central (stroke-related) facial palsy, the upper face is spared (forehead wrinkling is preserved) because bilateral cortical input protects upper facial muscles; Bell's palsy affects all facial muscles including the forehead.

Question 83: What is the duty of candor for DCAS paramedics?

To be open and honest with patients when things go wrong and to report errors or near-misses (Correct answer)
To maintain confidentiality at all times
To never discuss clinical decisions
To follow management instructions without question

Correct answer: To be open and honest with patients when things go wrong and to report errors or near-misses

The duty of candor requires DCAS paramedics to be open and transparent with patients when errors occur or when things go wrong, and to report incidents through proper channels for learning and improvement.

Question 84: What protocols does DCAS follow for managing obstetric emergencies?

Only provide emotional support
Obstetric cases are not handled by ambulance
Assess for imminent delivery, manage complications such as hemorrhage and eclampsia, and prepare for neonatal resuscitation (Correct answer)
Only transport to hospital without assessment

Correct answer: Assess for imminent delivery, manage complications such as hemorrhage and eclampsia, and prepare for neonatal resuscitation

DCAS protocols cover assessment of labor progress, imminent delivery management, hemorrhage control, pre-eclampsia/eclampsia treatment with magnesium sulfate, and neonatal resuscitation preparedness.

Question 85: What is the role of adrenaline (epinephrine) in DCAS cardiac arrest protocols?

It replaces defibrillation
It is never used in cardiac arrest
It is only used for allergic reactions
It is administered intravenously every 3-5 minutes during cardiac arrest to improve coronary and cerebral perfusion (Correct answer)

Correct answer: It is administered intravenously every 3-5 minutes during cardiac arrest to improve coronary and cerebral perfusion

Adrenaline 1mg IV is administered every 3-5 minutes during cardiac arrest to improve coronary and cerebral perfusion pressure through vasoconstriction, increasing the likelihood of return of spontaneous circulation.

Question 86: What is the correct compression-to-ventilation ratio for adult CPR according to DCAS protocols?

10:1
15:1
20:2
30:2 (Correct answer)

Correct answer: 30:2

DCAS follows international guidelines recommending a 30:2 compression-to-ventilation ratio for adult CPR, with compressions at a depth of 5-6 cm and a rate of 100-120 per minute.

Question 87: Complete AV block (third-degree heart block) with bradycardia causing haemodynamic compromise is treated pre-hospital with:

Digoxin loading dose
Adenosine 6mg IV rapid push
Amiodarone 300mg IV bolus
Transcutaneous pacing (TCP) as first-line, with atropine 0.5mg IV if pacing is unavailable (Correct answer)

Correct answer: Transcutaneous pacing (TCP) as first-line, with atropine 0.5mg IV if pacing is unavailable

TCP provides immediate rate control in complete AV block with haemodynamic compromise; atropine may increase ventricular rate as a temporising measure, but the definitive pre-hospital treatment is transcutaneous pacing.

Question 88: Intubation in the setting of cardiac arrest differs from RSI because:

No induction or paralytic agents are required — the patient is unconscious and apnoeic (Correct answer)
Succinylcholine must still be used
Video laryngoscopy is contraindicated in cardiac arrest
The dose of induction agent is doubled

Correct answer: No induction or paralytic agents are required — the patient is unconscious and apnoeic

In cardiac arrest, the patient is unconscious and has no muscle tone; drugs are not required for intubation and their administration wastes time — the paralytic and induction agent requirement of RSI does not apply.

Question 89: What is the mechanism of action of salbutamol (Ventolin) used by DCAS paramedics?

It reduces inflammation
It relaxes bronchial smooth muscle through beta-2 adrenergic receptor stimulation, causing bronchodilation (Correct answer)
It thins mucus secretions
It suppresses the immune response

Correct answer: It relaxes bronchial smooth muscle through beta-2 adrenergic receptor stimulation, causing bronchodilation

Salbutamol is a selective beta-2 adrenergic agonist that relaxes bronchial smooth muscle, producing bronchodilation and relieving bronchoconstriction in conditions like asthma and COPD.

Question 90: In a penetrating abdominal trauma with evisceration, pre-hospital management includes:

Pushing organs back into the abdominal cavity and covering with a dry dressing
Covering eviscerated organs with moist dressing without attempting to replace them, and rapid transport (Correct answer)
Cutting the eviscerated bowel and sending the patient to surgery
Applying firm circumferential bandaging directly over the organs

Correct answer: Covering eviscerated organs with moist dressing without attempting to replace them, and rapid transport

Eviscerated organs should be covered with a moist sterile dressing to prevent desiccation, not pushed back (risk of contamination and injury), and the patient transported urgently to surgery.

Question 91: In ACLS, pulseless electrical activity (PEA) is managed by:

CPR, epinephrine every 3-5 minutes, and treatment of reversible causes (Hs and Ts) (Correct answer)
Immediate defibrillation
Calcium gluconate IV as first-line
Atropine 1mg IV

Correct answer: CPR, epinephrine every 3-5 minutes, and treatment of reversible causes (Hs and Ts)

PEA is treated with high-quality CPR and epinephrine while simultaneously searching for and treating reversible causes (Hypovolaemia, Hypoxia, Hydrogen ion (acidosis), Hypo/hyperkalaemia, Hypothermia, Tension pneumothorax, Tamponade, Toxins, Thrombosis).

Question 92: Pre-hospital analgesia for a conscious trauma patient with a suspected long bone fracture should include:

No analgesia until hospital arrival
Titrated IV/IN opioids (e.g., morphine or fentanyl) and splinting of the fracture (Correct answer)
Aspirin 300mg orally
Full-dose IM morphine without titration

Correct answer: Titrated IV/IN opioids (e.g., morphine or fentanyl) and splinting of the fracture

Titrated opioid analgesia reduces pain and patient movement that can worsen injury; intranasal fentanyl is particularly useful in patients with poor IV access, and splinting reduces pain and blood loss.

Question 93: Diazepam's mechanism of action in seizure management is:

Enhancing GABA-A receptor activity, increasing chloride channel opening and neuronal inhibition (Correct answer)
Stimulating glycine receptors only in the spinal cord
Blocking NMDA glutamate receptors
Blocking sodium channels in neurons

Correct answer: Enhancing GABA-A receptor activity, increasing chloride channel opening and neuronal inhibition

Benzodiazepines bind to GABA-A receptors and enhance the effect of GABA (the main inhibitory neurotransmitter), increasing the frequency of chloride channel opening, hyperpolarising neurons and reducing seizure activity.

Question 94: Decontamination of casualties in a mass chemical incident uses:

Dry decontamination (removing and bagging clothing) only
Copious water irrigation (wet decontamination) as the primary method — removing the agent from the skin (Correct answer)
Blotting agents from the skin without water
Neutralising chemical agents with specific antidotes at the scene

Correct answer: Copious water irrigation (wet decontamination) as the primary method — removing the agent from the skin

Wet decontamination using copious water (and mild detergent for oily agents) is the most effective method for most chemical agents; removing clothing (dry decon) removes 80% of contamination and precedes wet decontamination.

Question 95: In ACLS, CPR cycles consist of:

15 compressions to 1 ventilation for all patients
Continuous compressions without ventilation for the first 10 minutes
15:2 ratio throughout the resuscitation
30 compressions to 2 ventilations (30:2) until an advanced airway is placed, then asynchronous (Correct answer)

Correct answer: 30 compressions to 2 ventilations (30:2) until an advanced airway is placed, then asynchronous

The 30:2 ratio applies until an advanced airway (ETT or supraglottic) is placed; once secured, continuous compressions at 100-120/min are given with ventilation at 10 breaths/min asynchronously.

Question 96: The 'Walking Blood Bank' concept in mass casualty incidents refers to:

Using pre-screened volunteer donors with known compatible blood types to provide fresh whole blood (Correct answer)
Transfusing walking casualties before stationary ones
A mobile blood bank vehicle deployed to disaster scenes
Ambulatory patients who can self-transport to hospital

Correct answer: Using pre-screened volunteer donors with known compatible blood types to provide fresh whole blood

In mass casualty or military settings where stored blood products are unavailable, walking blood banks use pre-screened volunteers with known ABO/Rh type as on-demand whole blood donors, providing the most physiologically complete haemorrhage replacement.

Question 97: What is the AVPU scale used by DCAS paramedics for rapid neurological assessment?

An ambulance vehicle priority system
A blood type classification system
A medication dosage calculation tool
Alert, Verbal response, Pain response, Unresponsive — a quick consciousness assessment (Correct answer)

Correct answer: Alert, Verbal response, Pain response, Unresponsive — a quick consciousness assessment

AVPU is a rapid neurological assessment tool: Alert (fully conscious), Verbal (responds to voice), Pain (responds only to pain stimulus), Unresponsive (no response), used for quick consciousness evaluation.

Question 98: How should DCAS paramedics manage heat-related emergencies common in Dubai's climate?

Only provide shade
Wait for the patient to cool naturally
Assess severity (heat exhaustion vs heat stroke), rapidly cool with ice packs to groin/axillae/neck, IV fluids, and monitor core temperature (Correct answer)
Only give cold water to drink

Correct answer: Assess severity (heat exhaustion vs heat stroke), rapidly cool with ice packs to groin/axillae/neck, IV fluids, and monitor core temperature

Dubai's extreme heat makes heat emergencies common. Management includes distinguishing severity, rapid active cooling (ice packs to major vessel areas), IV fluid resuscitation, and continuous temperature monitoring.

Question 99: How should DCAS paramedics manage acute asthma exacerbations?

Withhold all medications until hospital
Only provide a paper bag to breathe into
Give oral antihistamines
Administer high-flow oxygen, nebulized salbutamol, ipratropium bromide, and consider IV hydrocortisone for severe attacks (Correct answer)

Correct answer: Administer high-flow oxygen, nebulized salbutamol, ipratropium bromide, and consider IV hydrocortisone for severe attacks

Acute asthma management includes high-flow oxygen, nebulized salbutamol (beta-2 agonist), ipratropium bromide (anticholinergic), and IV/oral corticosteroids for severe exacerbations to reduce airway inflammation.

Question 100: Hypoglycaemia in a responsive pre-hospital patient is best treated with:

Oral glucose gel or glucose tablets if the patient can swallow safely (Correct answer)
Insulin administration to stabilise blood glucose
Glucagon IM injection regardless of oral capability
IV dextrose 50% as the only option

Correct answer: Oral glucose gel or glucose tablets if the patient can swallow safely

If the patient is conscious and can safely swallow, oral glucose is the preferred first-line treatment for hypoglycaemia; IV dextrose or IM glucagon are alternatives for patients unable to take oral glucose.

Question 101: What special considerations apply when DCAS paramedics manage pediatric emergencies?

Pediatric emergencies do not occur in Dubai
Only transport without treatment
Treat children the same as adults
Use weight-based drug dosing, age-appropriate equipment sizes, and recognize that children compensate longer before rapid deterioration (Correct answer)

Correct answer: Use weight-based drug dosing, age-appropriate equipment sizes, and recognize that children compensate longer before rapid deterioration

Pediatric emergencies require weight-based medication dosing, age-appropriate equipment selection (Broselow tape), and recognition that children maintain vital signs longer before rapidly decompensating.

Question 102: The 'Medical Treatment Officer' (MTO) role in Dubai MCI response is to:

Oversee treatment sector operations and coordinate paramedic teams at the casualty collection point (Correct answer)
Provide communication between scene and hospitals
Manage media and public information
Coordinate air ambulance assets

Correct answer: Oversee treatment sector operations and coordinate paramedic teams at the casualty collection point

The MTO manages the treatment area, ensuring triage categories are applied, treatment priorities are maintained, patients are moved to transport in order of priority, and paramedic teams are effectively deployed.

Question 103: Fentanyl's advantage over morphine for pre-hospital analgesia includes:

Faster onset, shorter duration, and suitability for intranasal administration — fewer haemodynamic effects (Correct answer)
No risk of respiratory depression at any dose
Greater potency requiring larger doses
Oral bioavailability for conscious patients

Correct answer: Faster onset, shorter duration, and suitability for intranasal administration — fewer haemodynamic effects

Fentanyl's faster onset (1-3 min IV, 5-10 min IN), shorter duration, intranasal route availability (no IV access needed), and greater haemodynamic stability make it preferred in many pre-hospital pain management protocols.

Question 104: In neonatal resuscitation, positive pressure ventilation (PPV) is indicated when the heart rate is:

Below 60 bpm only
Any heart rate with cyanosis
Below 100 bpm or the baby is apnoeic/gasping despite initial stimulation (Correct answer)
Below 40 bpm only

Correct answer: Below 100 bpm or the baby is apnoeic/gasping despite initial stimulation

PPV is initiated when the heart rate is <100 bpm or the newborn is apnoeic or gasping after initial steps; central cyanosis without breathing difficulty may respond to supplemental oxygen before PPV.

Question 105: The correct site for IM epinephrine injection in anaphylaxis is:

Deltoid muscle — easiest access
Anterolateral mid-thigh — fastest absorption into muscle and systemic circulation (Correct answer)
Buttock (gluteal) — largest muscle mass
Subcutaneous injection — same effect

Correct answer: Anterolateral mid-thigh — fastest absorption into muscle and systemic circulation

The anterolateral thigh has higher muscle vascularity and achieves faster peak blood levels than deltoid IM or subcutaneous injection; the vastus lateralis provides the most reliable and rapid drug delivery in anaphylaxis.

Question 106: What are the legal considerations for DCAS paramedics regarding patient consent?

Consent is never required in emergencies
Verbal consent from family is sufficient for all situations
Written consent is always required
Informed consent must be obtained when possible; implied consent applies in life-threatening emergencies with unconscious patients (Correct answer)

Correct answer: Informed consent must be obtained when possible; implied consent applies in life-threatening emergencies with unconscious patients

DCAS paramedics must obtain informed consent when patients are competent. In life-threatening emergencies where the patient is unconscious or unable to consent, implied consent allows necessary treatment.

Question 107: The 'Code Team Leader' in ACLS is responsible for:

Maintaining compressions throughout the resuscitation
Performing all interventions personally
Directing resuscitation, making treatment decisions, delegating tasks, and calling for termination (Correct answer)
Documenting all events in the patient care record

Correct answer: Directing resuscitation, making treatment decisions, delegating tasks, and calling for termination

The team leader directs the resuscitation without performing compressions (to maintain situational awareness), assigns roles, makes treatment decisions, integrates information, and determines when to terminate efforts.

Question 108: Open chest wounds ('sucking chest wounds') are treated with:

3-sided occlusive dressing (or vented chest seal) to allow air out but not in (Correct answer)
Immediate needle thoracostomy without dressing
Leaving open to allow chest to drain naturally
Complete occlusion with airtight dressing on all four sides

Correct answer: 3-sided occlusive dressing (or vented chest seal) to allow air out but not in

A 3-sided (or vented) dressing allows air to exit the pleural space during expiration while preventing air entrainment during inspiration, treating the open pneumothorax without converting it to a tension pneumothorax.

Question 109: The 'Golden Hour' concept in trauma care refers to:

The time taken to transport a patient from scene to hospital
The maximum time a patient can survive without oxygen
The critical period within the first hour after major trauma when definitive surgical care improves survival (Correct answer)
The first hour of a paramedic's shift

Correct answer: The critical period within the first hour after major trauma when definitive surgical care improves survival

The Golden Hour emphasises that severely injured trauma patients have the best survival outcomes when they receive definitive surgical intervention within approximately one hour of injury, driving rapid transport decisions.

Question 110: What is the SAMPLE history-taking mnemonic used by Dubai ambulance paramedics?

Symptoms, Age, Medical records, Prescriptions, Labs, Examinations
Sleep, Activity, Meals, Pain, Location, Equipment
Signs, Allergies, Medications, Past history, Last meal, Events leading to illness (Correct answer)
Swelling, Airway, Monitoring, Pulse, Lungs, ECG

Correct answer: Signs, Allergies, Medications, Past history, Last meal, Events leading to illness

SAMPLE stands for Signs/Symptoms, Allergies, Medications, Past medical history, Last oral intake, and Events leading to the present illness, providing a structured approach to patient history-taking.

Question 111: How does DCAS integrate with Dubai's wider emergency response system?

DCAS only operates within hospitals
DCAS only responds to traffic accidents
DCAS operates independently with no coordination
DCAS coordinates with Dubai Police, Civil Defence, and hospitals through a unified command system for major incidents (Correct answer)

Correct answer: DCAS coordinates with Dubai Police, Civil Defence, and hospitals through a unified command system for major incidents

DCAS integrates with Dubai Police (999), Civil Defence, and hospital emergency departments through coordinated dispatch systems and unified incident command for multi-agency responses to major incidents.

Question 112: Signs of decompensated shock in a paediatric patient include:

Hypotension, altered mental status, and mottled/cold extremities — late and ominous signs (Correct answer)
Normal blood pressure with mild tachycardia
Tachycardia and prolonged capillary refill (compensated shock) — not yet decompensated
Fever and tachycardia only

Correct answer: Hypotension, altered mental status, and mottled/cold extremities — late and ominous signs

Children compensate remarkably well — hypotension is a late and ominous sign indicating decompensation; earlier signs (tachycardia, prolonged CRT, cool extremities) indicate compensated shock and should trigger intervention.

Question 113: A patient describes the worst headache of their life, with sudden onset ('thunderclap' headache). Which condition must be immediately suspected?

Tension headache exacerbation
Cervicogenic headache
Subarachnoid haemorrhage (SAH) (Correct answer)
Cluster headache

Correct answer: Subarachnoid haemorrhage (SAH)

A sudden-onset 'thunderclap' headache described as the worst of the patient's life is the classic presentation of subarachnoid haemorrhage until proven otherwise.

Question 114: Which principle guides the decision to withhold resuscitation (DNR) in the pre-hospital setting in Dubai?

The paramedic's personal clinical judgment alone
Family wishes without documentation
Suspected terminal illness even without documentation
Valid documented DNR orders or clear signs of irreversible death (rigor mortis, dependent lividity, decapitation) (Correct answer)

Correct answer: Valid documented DNR orders or clear signs of irreversible death (rigor mortis, dependent lividity, decapitation)

Pre-hospital withholding of resuscitation requires valid documented advance directives (DNR orders) or unequivocal physical signs of irreversible death; absent these, resuscitation should be initiated and the matter resolved in hospital.

Question 115: Rapid Sequence Intubation (RSI) assumes the patient has a 'full stomach' meaning:

The patient needs to be held nil-by-mouth for 6 hours before intubation
Intubation should be deferred until gastric emptying occurs
The patient is at high risk of aspiration and steps to minimise this risk (pre-oxygenation, cricoid pressure, rapid drug sequence) are essential (Correct answer)
A nasogastric tube must be inserted before intubation

Correct answer: The patient is at high risk of aspiration and steps to minimise this risk (pre-oxygenation, cricoid pressure, rapid drug sequence) are essential

RSI treats all emergency patients as having a full stomach (non-fasted), using rapid drug sequence and technique to minimise the window of vulnerable unprotected airway, reducing aspiration risk.

Question 116: The METHANE major incident declaration report stands for:

Medical Emergency, Triage, Hospital notification, Assessment, Number treated, Emergency transport
Multiple casualties, Evacuation, Triage, Hospital, Air transport, Number, Expectant
Major incident (declared?), Exact location, Type of incident, Hazards, Access/egress, Number of casualties, Emergency services present (Correct answer)
Mass event, Emergency type, Hazmat, ALS required, Number transported, Evacuation

Correct answer: Major incident (declared?), Exact location, Type of incident, Hazards, Access/egress, Number of casualties, Emergency services present

METHANE is the international standard major incident information format: Major incident declared, Exact location, Type of incident, Hazards, Access routes, Number and severity of casualties, Emergency services on scene — enabling effective resource dispatch.

Question 117: What is the DCAS protocol for managing unstable tachycardia?

Perform synchronized cardioversion after sedation if the patient is hemodynamically unstable (Correct answer)
Give aspirin only
Administer atropine
Wait for natural conversion

Correct answer: Perform synchronized cardioversion after sedation if the patient is hemodynamically unstable

For hemodynamically unstable tachycardia with pulse, DCAS protocols require synchronized cardioversion with appropriate sedation, as the unstable rhythm threatens organ perfusion and requires immediate electrical treatment.

Question 118: In PALS, the primary cause of cardiac arrest in children differs from adults in that it is most commonly:

Traumatic cardiac arrest
Primary cardiac arrhythmia (VF/pVT)
Respiratory failure or shock leading to hypoxic cardiac arrest (Correct answer)
Pulmonary embolism

Correct answer: Respiratory failure or shock leading to hypoxic cardiac arrest

Unlike adults where VF/pVT is common, paediatric cardiac arrest is predominantly caused by respiratory failure or shock progressing to hypoxia, making airway management and early oxygenation the most critical interventions.

Question 119: Which of the following best describes a Transient Ischaemic Attack (TIA)?

A stroke with permanent deficit lasting over 24 hours
A seizure mimicking stroke symptoms
A haemorrhagic event in the cerebellum
A neurological deficit that resolves completely within 24 hours without infarction (Correct answer)

Correct answer: A neurological deficit that resolves completely within 24 hours without infarction

A TIA is a temporary episode of neurological dysfunction caused by focal brain ischaemia that resolves completely, typically within minutes to hours, with no evidence of infarction.

Question 120: Spinal cord injury management in the pre-hospital setting focuses on:

Complete neurological assessment before any movement
Spinal surgical planning at the scene
Immediate pharmacological neuroprotection with high-dose steroids
Preventing secondary cord injury through maintaining perfusion, oxygenation, and avoiding hypotension (Correct answer)

Correct answer: Preventing secondary cord injury through maintaining perfusion, oxygenation, and avoiding hypotension

Secondary spinal cord injury from hypotension, hypoxia, and excessive movement can worsen outcomes; maintaining MAP ≥85-90 mmHg (in suspected spinal cord injury) and adequate oxygenation are the key pre-hospital interventions.

Dubai Corporation for Ambulance Services (DCAS) Exam

The DCAS exam certifies paramedics and emergency medical technicians for the Dubai Corporation for Ambulance Services, covering pre-hospital care, cardiac emergencies, trauma, pharmacology, and Dubai EMS protocols.

120

Questions

150 min

Time Limit

75%

To Pass

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These practice questions were written with AI tools. They are not real exam questions. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

ambulance.gov.ae — Fees, eligibility · verified Oct 2026