The therapist has been requested to obtain a P0.1 measurement from a patient who is being mechanically ventilated. Which of the following conditions are requirements for this measurement?
A. The patient must be sedated and paralyzed.
B. The patient may be either breathing spontaneously or by controlled mechanical ventilation.
C. The patient must be breathing spontaneously.
D. This maneuver cannot be performed on a mechanically ventilated patient.
?ANS: C
A. Incorrect response: See explanation C.
B. Incorrect response: See explanation C.
C. Correct response: The airway occlusion pressure (P0.1) is the negative airway pressure generated during the first 100 msec of an occluded inspiration. P0.1 is a parameter for the neuromuscular activation of the respiratory system, which is an important determinant for the work of breathing. It has been shown to be a good predictor for successful weaning from mechanical ventilation, and the patient must be breathing spontaneously.
D. Incorrect response: See explanation C.
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