Core Topics Flashcards

Which of the following is the most appropriate first step in managing a patient with a suspected airway obstruction?

Answer: Insert an oropharyngeal airway

In a patient with a suspected airway obstruction, especially if unconscious, the initial step is to open the airway using basic maneuvers. If these are insufficient, inserting an oropharyngeal airway (OPA) is the most appropriate first device-based intervention. It helps maintain an open airway by preventing the tongue from obstructing the pharynx, serving as a crucial bridge to more advanced airway management if needed.

A patient is placed on mechanical ventilation. Which of the following settings is typically adjusted to control the patient's carbon dioxide (CO2) levels?

Answer: Respiratory rate

On mechanical ventilation, the respiratory rate is the primary setting adjusted to control the patient's carbon dioxide (CO2) levels. Increasing the respiratory rate increases the minute ventilation, which helps to 'blow off' more CO2 from the lungs, thereby lowering blood CO2 levels. Conversely, decreasing the respiratory rate allows CO2 to accumulate.

Which of the following is the best indicator of tissue perfusion in a critically ill patient?

Answer: Lactate level

Lactate level is the best indicator of tissue perfusion in a critically ill patient because it directly reflects the metabolic state of the tissues. Elevated lactate signifies anaerobic metabolism, which occurs when oxygen delivery is insufficient to meet cellular demands, indicating global tissue hypoperfusion and shock. It provides an early and sensitive measure of inadequate oxygenation at the cellular level.

In the management of septic shock, which of the following is the first-line vasopressor recommended for use?

Answer: Norepinephrine

Norepinephrine is the first-line vasopressor recommended for use in the management of septic shock. It is preferred due to its potent alpha-1 adrenergic effects, which cause vasoconstriction and effectively increase mean arterial pressure, crucial for maintaining organ perfusion. Major guidelines, such as the Surviving Sepsis Campaign, endorse its use due to its efficacy and favorable side effect profile.

Which of the following is the primary goal in the initial management of a patient with increased intracranial pressure (ICP)?

Answer: Reducing intracranial pressure

The primary goal in the initial management of a patient with increased intracranial pressure (ICP) is to reduce that pressure. Elevated ICP can compromise cerebral blood flow, leading to ischemia, and can cause brain herniation, which is often fatal. Interventions are focused on lowering ICP to maintain adequate cerebral perfusion pressure and prevent secondary brain injury.