The therapist is mechanically ventilating an ARDS patient in the PRVC mode. What can the therapist expect to happen when the patient's lung mechanics worsen?
A. potentially expose healthier lung units to higher pressures
B. inflation pressures will decrease, reducing the incidence of barotrauma
C. tidal volume will fluctuate considerably throughout the course of ventilation
D. pressure limit will vary
ANS: A
A. Correct response: PRVC is a dual control mode of mechanical ventilation. The therapist sets a maximum pressure limit, Vt, and mandatory rate. The ventilator delivers a test breath, and calculates system compliance and resistance. The ventilator determines the pressure needed to deliver the set volume. The ventilator performs this calculation each breath to adjust pressure delivery to accomplish volume delivery.
Because ARDS produces regional inhomogeneities, the delivered volume preferentially flows to the healthier areas of the lungs. Therefore more of the tidal volume goes to the normal lung units and overinflates them. This situation can cause overdistention and ultimately volutrauma.
B. Incorrect response: See explanation A.
C. Incorrect response: See explanation A.
D. Incorrect response: See explanation A
You might also like to view...
For which of the following patients might you recommend bland aerosol therapy administration? 1. Patient with upper airway edema 2. Patient with a bypassed upper airway 3. Patient who must provide a sputum specimen
a. 1, 2, and 3 b. 2 and 3 only c. 1 and 2 only d. 1 and 3 only
When utilizing the 6-second method, you count the number of R waves in a six-second strip and multiply by:
A. 5. B. 10. C. 15. D. 20.
Humans share the same physical needs, and we meet them in the same ways
a. True b. False Indicate whether the statement is true or false
Explain the reason why a new case must be created when a patient is injured at work.
A. so that the claims are billed to the workers' compensation plan, not to the patient's personal policy B. so that the patient can be billed for the claim C. so that the claims are billed to the patient's personal policy, not to the workers' compensation plan D. None of these are correct.