Dysfunction of the heart's conductive cells most likely will cause:

You have applied a nonporous dressing to a puncture wound on a patient's chest. An OEC candidate asks you why the dressing was taped only on three sides. Your best response is that taping the dressing on three sides:

a. permits oxygen to enter the lungs. b. allows trapped air to escape upon exhalation. c. is less painful for the patient. d. decreases the chances that air will enter the chest upon exhalation.

Which of the following measurements may be helpful in the assessment of recovery during ECLS?

A. activated clotting times less than 200 seconds B. dynamic compliance of 0.8 ml/cm H2O or greater C. oxygenation index of less than 40 D. PEEP of 10 cm H2O or less