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Answer :
Final answer:
A positive endotracheal tube cuff leak test is identified by 3) an audible leak when the cuff is deflated, which indicates that the airway is patent enough for potential extubation.
Explanation:
The positive endotracheal tube cuff leak test is a clinical procedure used to assess whether it is safe to remove an endotracheal tube from a patient. An audible leak with the cuff deflated indicates a positive test. This is essential to evaluate before extubation to ensure that the patient's airway will remain open and not obstructed due to swelling or other complications. This test is distinct from blood pressure measurement, which involves listening for Korotkoff sounds to determine systolic and diastolic pressure. However, during a cuff leak test in the context of mechanical ventilation, a clinician deflates the cuff of an endotracheal tube to check if air can pass around the tube and through the patient's vocal cords, indicating that there is no significant swelling blocking the airway.
The correct answer to the student's question is option 3) Audible leak with cuff deflated. This indicates that the patient's airway has enough patency to potentially handle breathing without the tube. It's important to note that the cuff leak test is a method specific to assessing readiness for extubation and is not directly related to the concepts of lung capacity measurement or the blood pressure measurement procedure, which involves Korotkoff sounds and the use of a sphygmomanometer.
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