Practice Quiz

Respiratory Therapist

Category - Patient Evaluations and Recommendations

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In a patient with chronic airway obstruction, the exhalation time will generally need to be how much longer than the length of inspiration time?
  1. 1-2 times longer
  2. 3-4 times longer
  3. 4-5 times longer
  4. 5-6 times longer
Explanation
Answer: B - The exhalation time will need to be 3-4 times longer than the inspiratory time in a COPD patient.

A high expiratory pressure is found in patients with chronic airways obstruction (CAO). As such, longer exhalation period is expected. This is also referred to as I:E ratio.
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