CCRN Practice Questions AACN With Answers Grade A Certified 2025/26

what do you do if a pt becomes hypotensive when peep is increased - correct answersgive volume how does peep affect cardiac output - correct answerspeep decreases venous return how to best assess a child on high frequency ventilation - correct answerscap refill, pulses, chest FLUTTER best scans for assessing pulmonary embolism in a child - correct answersMRI, spiral CT, ventilation-perfusion scintigraphy *** d dimer fragments might be affected by the liver & are not as reliable for kids s/s aspiration pneumonia - correct answersfoul smelling sputum, febrile, persistent cough, consolidation on cxr bronchiolitis s/s - correct answersparoxysmal cough, respiratory distress that worsens, low grade fever, rhinorrhea, cxr: hyperinflation and flattened diaphragm w areas of atelectasis and air trapping how is the heart affected by air trapping - correct answersincreased RIGHT VENTRICULAR afterload due to pulmonary circulation air trapping leads to increased lung volume which neuromuscular agent is contraindicated in liver failure - correct answersvecuronium How does succinylcholine work? - correct answerscan cause HYPERKALEMIA -neuromuscular blocking drug -only clinically useful depolarizing blocker -used to facilitate both rapid sequence and routine endotracheal intubation and to relax skeletal muscles during surgery -does not reduce pain Suxamethonium has a longer duration of effect than acetylcholine, and is not hydrolyzed by acetylcholinesterase. By maintaining the membrane potential above threshold, it does not allow the muscle cell to repolarize. When acetylcholine binds to an already depolarized receptor, it cannot cause further depolarization. Calcium is removed from the muscle cell cytoplasm independent of repolarization (depolarization signaling and muscle contraction are independent processes). As the calcium is taken up by the sarcoplasmic reticulum, the muscle relaxes. This explains muscle flaccidity rather than tetany following fasciculation. The results are membrane depolarization and transient fasciculations, followed by paralysis. BETA 2 - correct answerscan affect K and cause QT prolongation s/s of magnesium administration - correct answersbronchodilation, hypotension, diarrhea, flushing