Practice Quiz

Respiratory Therapist

Category - Patient Evaluations and Recommendations

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If a mechanically ventilated, the patient has an auto PEEP of 2 cmH2O and is ordered to have PEEP of 5 cmH2O; how much pressure is present at the start of inspiration?
  1. 2 cmH2O
  2. 5 cmH2O
  3. 7 cmH2O
  4. 9 cmH2O
Explanation
Answer: A - At the start of inspiration patient would have 2 cmH2O present.

If a patient has a 2 cmH2O of auto PEEP, this number is constant. It will not fluctuate with inspiration or exhalation. The PEEP at exhalation would be 7 cmH2O as the patient would have 5 cmH2O in addition to the auto PEEP of 2 cmH2O.
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