7th Edition Flashcards

Your emergency medical squad is on its way to the attack scene. According to dispatch data, law enforcement is still not present at the location. In this case, the best course of action is:

Answer: Staging at a safe location away from the scene until law enforcement advises the scene is safe

Scene safety is the paramount concern for all emergency responders. Approaching an unsecured scene, especially one involving an attack where the assailant may still be present, places EMS personnel at significant risk. The safest and most appropriate action is to stage at a secure distance and await confirmation from law enforcement that the scene has been rendered safe before entering.

What indicates that a trauma patient's ventilator is not working well enough?

Answer: Speaking in short bursts

If a trauma patient is speaking in short bursts, it indicates that they are experiencing respiratory distress or dyspnea. This suggests that their ventilatory effort is insufficient to maintain normal speech, implying that their breathing is compromised and the ventilator may not be adequately supporting their respiratory needs. Other options generally fall within acceptable parameters for adequate ventilation.

You observe that a trauma patient is angry, confused, and looks to have several injuries from an altercation during the initial survey. Your top decision for treatment should be one of the following:

Answer: Correction of possible hypoxia

In a trauma patient with altered mental status (anger, confusion), the immediate priority is to address potential life threats. Altered mental status is a key indicator of inadequate brain oxygenation, or hypoxia. Correcting hypoxia is paramount as it directly impacts neurological function and overall patient survival, taking precedence over other interventions like IV access or immobilization during the initial survey.

What is the most frequent reason why trauma patients experience upper airway obstruction?

Answer: Tongue

The most frequent cause of upper airway obstruction in an unconscious or semi-conscious trauma patient is the relaxation of the tongue and epiglottis. When muscle tone is lost, the tongue falls back against the posterior pharynx, blocking the airway. While other substances like blood or vomitus can obstruct the airway, the tongue is the most common anatomical culprit, necessitating proper airway maneuvers like the jaw-thrust.

Which is the most serious side effect of suctioning trauma patients for an extended period of time?

Answer: Hypoxia

The most serious side effect of extended suctioning in trauma patients is hypoxia. Suctioning removes not only secretions but also oxygen from the airway, rapidly decreasing the patient's oxygen saturation. This is particularly dangerous for trauma patients who may already have compromised respiratory function or increased metabolic demands, making brief suctioning attempts (under 10-15 seconds) and reoxygenation crucial.

Which is the primary justification for keeping the trauma patient's airway open?

Answer: To prevent hypoxemia and hypercarbia

The primary justification for maintaining an open airway in trauma patients is to prevent hypoxemia (low blood oxygen) and hypercarbia (high blood carbon dioxide). An obstructed airway prevents adequate gas exchange, leading to insufficient oxygen delivery to tissues and impaired carbon dioxide removal. Both conditions are life-threatening and can quickly result in organ damage, brain injury, and cardiac arrest.

A middle-aged man who was involved in a motorbike crash is your patient. He doesn't respond at all. You observe the patient is snoring at a rate of six after employing a modified jaw push to open the airway. On the left side, auscultation indicates no breath sounds. The following course of action ought to be:

Answer: Perform a needle decompression

The patient's presentation of unresponsiveness, snoring respirations (indicating partial obstruction), a very low respiratory rate of six, and absent breath sounds on the left side after significant trauma strongly suggests a tension pneumothorax. This is a life-threatening condition where air accumulates in the pleural space, collapsing the lung and shifting mediastinal structures. Immediate needle decompression is required to relieve the pressure and restore ventilation.

It is reasonable to presume that a trauma patient may experience hypotension of unknown etiology. from:

Answer: Blood loss

In trauma, the most common and immediate cause of hypotension (low blood pressure) is hypovolemic shock due to blood loss. While other conditions like spinal injury, tension pneumothorax, or cardiac tamponade can also cause hypotension, hemorrhage is the most frequent and critical concern. Therefore, when encountering unexplained hypotension in a trauma patient, blood loss should be presumed until proven otherwise.

When a healthy adult has early hypotension, what percentage of blood is lost?

Answer: 15% to 30%

In a healthy adult, the body's compensatory mechanisms can effectively maintain blood pressure and perfusion with minor blood loss. However, early signs of hypotension typically begin to manifest when approximately 15% to 30% of the total blood volume has been lost. This corresponds to Class II hemorrhage, where compensatory mechanisms like tachycardia and vasoconstriction are active but may start to be overwhelmed.

Which of the following could be brought on by trauma victims taking medication for preexisting conditions?

Answer: Beta blockers may prevent tachycardia with blood loss

Beta blockers are medications that slow the heart rate and reduce the force of heart contractions. In a trauma patient experiencing blood loss, the body's natural compensatory response is to increase the heart rate (tachycardia) to maintain cardiac output. Beta blockers can mask this crucial sign of hypovolemic shock, making it difficult for healthcare providers to accurately assess the severity of hemorrhage.

The male patient, age 20, was diving to catch a football when he banged his head on a teammate's knee. There was no helmet on him. He has a GCS of 4, indicating decerebrate posturing. His blood pressure is 180/102, his left pupil is dilated, and his heart rate is 58. Which breathing rate is ideal for this patient's care?

Answer: 10 breaths per minute

This patient exhibits classic signs of severe traumatic brain injury (TBI) with increased intracranial pressure (ICP), including a low GCS, decerebrate posturing, Cushing's triad (hypertension, bradycardia), and a dilated pupil. For severe TBI, the recommended ventilation rate is typically 10 breaths per minute to maintain normocapnia (PaCO2 35-45 mmHg). This avoids hyperventilation, which can cause cerebral vasoconstriction and worsen brain ischemia, while preventing hypoventilation which would increase ICP.