CMT Patient Safety and Monitoring — Questions and Answers
Question 1: When monitoring a patient on telemetry, which ECG rhythm requires immediate intervention?
- Normal sinus rhythm
- Sinus bradycardia at 55 bpm in a sleeping patient
- Ventricular fibrillation (Correct answer)
- Sinus arrhythmia
Correct answer: Ventricular fibrillation
Ventricular fibrillation is a lethal rhythm with no organized cardiac activity, requiring immediate defibrillation.
Ventricular fibrillation (VF) is a disorganized electrical activity where the ventricles quiver instead of contracting, producing zero cardiac output. Without immediate intervention, death occurs within minutes. Treatment follows ACLS protocol: immediate high-quality CPR, defibrillation as soon as possible (200J biphasic), epinephrine every 3-5 minutes, and amiodarone for refractory VF. On the ECG, VF appears as chaotic, irregular waveforms with no identifiable P waves, QRS complexes, or T waves. Medical technicians monitoring telemetry must recognize lethal rhythms and activate the emergency response system immediately.
Question 2: The normal adult blood pressure range is:
- Less than 100/60 mmHg
- Less than 120/80 mmHg (Correct answer)
- 140/90-160/100 mmHg
- 160/100-180/110 mmHg
Correct answer: Less than 120/80 mmHg
Normal adult blood pressure is less than 120/80 mmHg according to the American Heart Association guidelines.
AHA blood pressure categories: Normal (<120/<80), Elevated (120-129/<80), Stage 1 Hypertension (130-139 or 80-89), Stage 2 Hypertension (≥140 or ≥90), and Hypertensive Crisis (>180 and/or >120—requires immediate medical attention). Proper measurement technique includes: seated patient with feet flat and back supported, arm at heart level, correct cuff size (bladder covers 80% of arm circumference), no caffeine/smoking for 30 minutes prior, 5 minutes of quiet rest before measurement, and averaging two readings taken 1-2 minutes apart.
Question 3: A patient's oxygen saturation (SpO2) drops to 88%. The medical technician should first:
- Document the finding and continue monitoring
- Reposition the patient and verify the reading, then notify the nurse or provider (Correct answer)
- Wait 30 minutes and recheck
- Administer oxygen without an order
Correct answer: Reposition the patient and verify the reading, then notify the nurse or provider
First verify the reading by repositioning the probe and checking for signal quality, then promptly notify the nurse or provider for clinical assessment.
An SpO2 of 88% is below the normal range (95-100%) and warrants prompt action. The systematic approach is: (1) Check the pulse oximeter signal quality (waveform, signal strength indicator), (2) Reposition the probe or try a different finger, (3) Assess the patient clinically (respiratory rate, effort, color, level of consciousness), (4) Ensure the patient is in an upright or semi-Fowler's position, (5) Notify the nurse/provider immediately with assessment findings, (6) Administer supplemental oxygen only if there is a standing order or protocol. A medical technician should not independently initiate oxygen without an order unless there is an approved emergency protocol. Causes of low SpO2 include respiratory disease, heart failure, atelectasis, and PE.
Question 4: Which vital sign change would indicate a patient is developing sepsis?
- Blood pressure 118/76 mmHg
- Temperature 101.5°F with heart rate 110 bpm and respiratory rate 24 (Correct answer)
- Heart rate 72 bpm at rest
- Respiratory rate 16 breaths per minute
Correct answer: Temperature 101.5°F with heart rate 110 bpm and respiratory rate 24
The combination of fever, tachycardia, and tachypnea meets criteria for systemic inflammatory response syndrome (SIRS), which may indicate sepsis.
Sepsis screening criteria (qSOFA and SIRS) include combinations of: temperature >100.4°F (38°C) or <96.8°F (36°C), heart rate >90 bpm, respiratory rate >20 breaths/min, WBC >12,000 or <4,000, altered mental status, and systolic BP ≤100 mmHg. Early recognition is critical because sepsis progresses rapidly to septic shock (sepsis + persistent hypotension despite fluid resuscitation + lactate >2 mmol/L). Every hour delay in antibiotic administration increases mortality by approximately 8%. Medical technicians play a vital role in early detection through frequent vital sign monitoring and immediate reporting of concerning trends.
Question 5: Capillary refill time is assessed by pressing on a nail bed and should return to normal color within:
- Less than 2 seconds (Correct answer)
- 3-5 seconds
- 5-10 seconds
- 10-15 seconds
Correct answer: Less than 2 seconds
Normal capillary refill time is less than 2 seconds, indicating adequate peripheral perfusion.
Capillary refill time (CRT) is a simple, non-invasive assessment of peripheral perfusion. Technique: firmly press the patient's nail bed for 5 seconds until it blanches (turns white), release, and count the seconds until color returns. Normal is less than 2 seconds. Prolonged CRT (>2 seconds) may indicate dehydration, shock, peripheral vascular disease, hypothermia, or heart failure. Factors affecting CRT include ambient temperature (cold environments prolong it), age (slower in elderly), nail polish, and lighting conditions. While CRT alone is not diagnostic, combined with other findings (tachycardia, hypotension, altered mental status), it helps identify patients with compromised perfusion.
Question 6: Continuous cardiac monitoring is most important for patients receiving which type of medication?
- Oral antibiotics
- Topical antifungal cream
- Intravenous potassium (Correct answer)
- Oral acetaminophen
Correct answer: Intravenous potassium
IV potassium administration requires continuous cardiac monitoring because rapid infusion or high concentrations can cause fatal cardiac arrhythmias.
Intravenous potassium is a high-alert medication because hyperkalemia can cause fatal cardiac arrhythmias including ventricular fibrillation and asystole. ECG changes with hyperkalemia progress from peaked T waves, to prolonged PR interval, widened QRS, sine wave pattern, and finally cardiac arrest. Safety requirements for IV potassium: maximum concentration of 40 mEq/L in peripheral IV (higher concentrations require central line), maximum infusion rate of 10-20 mEq/hour, continuous cardiac monitoring during infusion, IV pump required (never gravity infusion), and serum potassium level checked before and after administration. Other medications requiring cardiac monitoring include digoxin, antiarrhythmics, and certain chemotherapy agents.
Question 7: A patient's blood glucose reading is 45 mg/dL. This indicates:
- Normal blood glucose
- Hyperglycemia
- Hypoglycemia (Correct answer)
- Diabetes mellitus
Correct answer: Hypoglycemia
A blood glucose of 45 mg/dL is significantly below normal (70-100 mg/dL fasting) and indicates hypoglycemia requiring immediate treatment.
Hypoglycemia is defined as blood glucose below 70 mg/dL. At 45 mg/dL, the patient is in severe hypoglycemia with risk of seizures, loss of consciousness, and brain damage. Symptoms progress from adrenergic (shakiness, sweating, tachycardia, anxiety) to neuroglycopenic (confusion, slurred speech, visual changes, seizures, coma). Treatment follows the Rule of 15: give 15 grams of fast-acting carbohydrate (4 oz juice, glucose tablets), recheck in 15 minutes, repeat if still below 70 mg/dL. For unconscious patients, IV dextrose 50% or intramuscular glucagon is required. Medical technicians must report critical glucose values immediately and ensure the patient is not left alone.
Question 8: Orthostatic vital signs are taken to assess:
- Cardiac output during exercise
- Blood pressure and heart rate changes with position changes (Correct answer)
- Respiratory function during sleep
- Temperature regulation
Correct answer: Blood pressure and heart rate changes with position changes
Orthostatic (postural) vital signs measure blood pressure and heart rate in lying, sitting, and standing positions to detect orthostatic hypotension.
Orthostatic vital signs assess the cardiovascular system's ability to compensate for position changes. Procedure: (1) Patient lies supine for 3-5 minutes, record BP and HR, (2) Patient sits up, wait 1-3 minutes, record BP and HR, (3) Patient stands, wait 1-3 minutes, record BP and HR. Positive orthostatic hypotension is defined as a systolic BP drop of ≥20 mmHg, diastolic drop of ≥10 mmHg, or HR increase of ≥20 bpm from lying to standing. Causes include dehydration, blood loss, medications (antihypertensives, diuretics), prolonged bed rest, and autonomic dysfunction. Positive findings increase fall risk and may indicate the need for IV fluids or medication adjustment.
Question 9: When monitoring a patient receiving a blood transfusion, the technician should watch for signs of transfusion reaction including:
- Decreased heart rate and drowsiness
- Fever, chills, urticaria, and back pain (Correct answer)
- Increased appetite and energy
- Improved skin color only
Correct answer: Fever, chills, urticaria, and back pain
Signs of transfusion reaction include fever, chills, hives (urticaria), back or flank pain, dyspnea, and hypotension.
Transfusion reactions range from mild (febrile, allergic) to life-threatening (acute hemolytic, anaphylactic). Vital signs must be taken before transfusion, 15 minutes after starting, and at prescribed intervals thereafter. The first 15 minutes and first 50 mL are the most critical monitoring period. Signs requiring immediate action: fever (≥1°C rise), chills/rigors, urticaria/hives, itching, dyspnea, wheezing, back/flank pain, hypotension, tachycardia, dark urine, and anxiety. If a reaction occurs: stop the transfusion immediately, keep the IV line open with normal saline, notify the provider, send the blood bag and tubing to the blood bank, and collect blood and urine specimens as ordered.
Question 10: A patient with a chest tube should be monitored for:
- Expected continuous bubbling in the water seal chamber
- Tidaling (fluctuation) in the water seal chamber with respiration (Correct answer)
- The drainage system being elevated above the chest
- Clamped chest tubes at all times
Correct answer: Tidaling (fluctuation) in the water seal chamber with respiration
Tidaling (fluid level rising with inspiration and falling with expiration) in the water seal chamber is a normal finding indicating the system is functioning properly.
Chest tube monitoring essentials: (1) Tidaling in the water seal chamber is normal—it indicates the system is patent and responding to intrapleural pressure changes during breathing, (2) Continuous bubbling in the water seal chamber is abnormal and indicates an air leak in the system, (3) The drainage collection system must ALWAYS remain below the chest level to prevent fluid backflow, (4) Never clamp a chest tube unless ordered (clamping can cause tension pneumothorax), (5) Monitor drainage amount, color, and consistency hourly, (6) Assess for subcutaneous emphysema around the insertion site, (7) Ensure connections are taped and secure, (8) Have a bottle of sterile water at bedside in case the system is disconnected or broken.
Question 11: The Modified Early Warning Score (MEWS) is used to:
- Determine medication dosages
- Identify patients at risk of clinical deterioration (Correct answer)
- Calculate fluid requirements
- Schedule diagnostic tests
Correct answer: Identify patients at risk of clinical deterioration
MEWS is a bedside assessment tool that uses physiological parameters to identify patients at risk of clinical deterioration.
The Modified Early Warning Score assigns points based on deviations from normal in five physiological parameters: systolic blood pressure, heart rate, respiratory rate, temperature, and level of consciousness (AVPU scale). Each parameter scores 0-3, with higher scores indicating greater deviation. A total MEWS of 4 or higher typically triggers clinical escalation—increased monitoring frequency, bedside assessment by a senior clinician, or rapid response team activation. MEWS enables early detection of deterioration, allowing intervention before progression to cardiac arrest or ICU admission. Studies show that patients who trigger MEWS criteria have a significantly higher risk of adverse outcomes within the following 24 hours.
Question 12: When monitoring intake and output (I&O), which of the following should be included in intake measurement?
- Only oral fluids consumed at meals
- All oral fluids, IV fluids, tube feedings, and IV medications (Correct answer)
- Only IV fluids
- Only fluids given by the nursing staff
Correct answer: All oral fluids, IV fluids, tube feedings, and IV medications
Intake includes ALL fluids entering the body: oral liquids, IV fluids, blood products, tube feedings, and IV medications.
Accurate intake and output monitoring is critical for assessing fluid balance, kidney function, and cardiac status. Intake includes: oral fluids (water, juice, coffee, soup, gelatin, ice chips at 50% volume), IV fluids (maintenance, boluses, piggybacks), IV medications, blood products, tube feedings, and irrigation fluids retained. Output includes: urine (measured precisely via urimeter or graduated container), emesis, wound drainage, chest tube drainage, nasogastric drainage, stool (especially diarrhea), and estimated blood loss. Normal adult urine output is 0.5-1.0 mL/kg/hour. Output below 30 mL/hour in adults may indicate renal compromise or dehydration and should be reported promptly.
CMT Patient Safety and Monitoring
When monitoring a patient on telemetry, which ECG rhythm requires immediate intervention?
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