How Is the Positive Pressure Level Established in a Bubble

question 5

Multiple Choice

How is the positive pressure level established in a bubble CPAP system?

• A) The therapist dials the desired CPAP level directly on the ventilator.
• B) The therapist immerses the distal end of the expiratory limb a certain distance below the water surface.
• C) The CPAP level is established by stacking adaptors with weighted balls to the distal opening of the expiratory limb.
• D) The positive pressure is achieved by tightening a screw clamp attached to the expiratory limb until the desired pressure is achieved.

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