Peds CCRN Review Questions with Complete Solutions (from AACN)

Peds CCRN Review Questions with Complete Solutions (from AACN) PEEP is intended to do which of the following? A. Improve ventilation/perfusion matching B. Decrease functional residual capacity C. Increased venous return to the heart D. Increased cardiac output - Correct Answer A. Improve ventilation/perfusion matching - PEEP increases alveolar volume, thereby improving ventilation/perfusion matching and increasing functional residual capacity. - A detrimental effect of PEEP (especially at high levels) is a decrease in venous return to the heart and a subsequent decrease in cardiac output. In an infant with sepsis, factors that impair the release of oxygen by negatively affecting oxyhemoglobin dissociation include: A. Hyperthermia B. Metabolic acidosis C. Respiratory acidosis D. Hypothermia - Correct Answer D. Hypothermia - To answer this question, you must consider the factors that would cause a left shift of the oxyhemoglobin curve. - Hypothermia, decreased CO2, and increased pH (alkalosis) would all cause a left shift. - Hyperthermia and acidosis would cause a right shift of the curve In which condition might you observe a decreased V/Q ratio (<0.8)? A. Status asthmaticus B. Sepsis C. Pulmonary emboli D. Tricuspid atresia - Correct Answer A. Status asthmaticus