Why is the use of applied PEEP generally not necessary for patients who require mechanical ventilation for respiratory failure caused by airflow obstruction?
A. because PEEP will have little affect on the oxygenation of these type patients
B. because PEEP tends to overdistend obstructed regions of the lungs
C. because PEEP will unnecessarily prolong the expiratory time
D. because PEEP will significantly reduce the delivered tidal volume
ANS: C
A. Correct response: Because alveolar inflammation, flooding, and collapse from airflow obstruction are not major features of acute respiratory failure from airflow obstruction, applying PEEP to maintain alveolar recruitment is generally unnecessary. Moreover, because applied PEEP can further overdistend obstructed regions, PEEP should probably be avoided unless clear regions of atelectasis or alveolar edema exist. Fio2 adjustments can be used to provide adequate oxygenation. Applied PEEP, however, may help the patient trigger breaths in the presence of high levels of auto-PEEP. The hypoxemia these patients experience results from simple V/Q abnormalities, manageable by changes in Fio2.
B. Incorrect response: See explanation A.
C. Incorrect response: See explanation A.
D. Incorrect response: See explanation A
You might also like to view...
Brachial refers to the arm, and the term ________ refers to the thigh.
Fill in the blank(s) with the appropriate word(s).
Accounts Receivable (A/R) refers to
A. cases that have not yet been paid. B. the amount the hospital was paid. C. cases that have been paid. D. denials that have been returned to the hospital.
Which of the following suffixes indicates the drug is a bronchodilator?
–terol –olol –alol –pril
After providing 30 seconds of positive-pressure ventilations to a premature newborn, your partner assesses the infant's heart rate and finds that it is 50 beats/min. You should:
A. request a paramedic crew so they perform intubation. B. obtain vascular access and give IV fluid boluses. C. ventilate the newborn for 30 seconds and reassess. D. advise your partner to initiate chest compressions.