Intraoperative Procedures & Patient Monitoring Flashcards
7 cards from real CCP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Intraoperative Procedures & Patient Monitoring flashcards as text
When monitoring a patient during CPB with a pulmonary artery catheter, which parameter directly reflects left ventricular preload?
Answer: Pulmonary artery occlusion pressure (PAOP)
Pulmonary artery occlusion pressure (PAOP/PCWP), measured when the balloon is inflated, reflects left atrial pressure and thus left ventricular end-diastolic pressure (preload).
The primary mechanism by which hypothermia protects the brain during circulatory arrest is:
Answer: Reducing cerebral metabolic rate for oxygen (CMRO2)
Hypothermia primarily protects the brain by reducing the cerebral metabolic rate for oxygen (CMRO2), decreasing neuronal energy demand during the period of no perfusion.
A perfusionist observes pink frothy fluid in the arterial outflow of the oxygenator. This finding most likely indicates:
Answer: Oxygenator blood leak into the gas phase
Pink frothy fluid in the oxygenator gas outlet indicates a blood-gas interface breach where blood is leaking into the gas phase, requiring immediate oxygenator change.
Which factor most significantly increases the risk of gaseous microemboli during CPB?
Answer: Rapid rewarming with large temperature gradients
Rapid rewarming with large temperature gradients between the water bath and patient blood causes dissolved gases to come out of solution, creating gaseous microemboli.
During CPB, the systemic flow rate for an adult patient is typically calculated based on:
Answer: Body surface area (BSA) with a target of 2.0–2.4 L/min/m²
Adult CPB flow is indexed to body surface area, with a standard target of 2.0–2.4 L/min/m² to ensure adequate systemic oxygen delivery.
An intraoperative transesophageal echocardiogram (TEE) shows significant aortic valve regurgitation during CPB. The perfusionist's primary concern should be:
Answer: LV distension from aortic regurgitation compromising myocardial protection
Aortic regurgitation during cardioplegia delivery allows cardioplegia to leak back into the LV, causing ventricular distension and inadequate myocardial protection.
The Fick principle, as applied during CPB monitoring, relates oxygen consumption to:
Answer: The product of cardiac output and the arteriovenous oxygen content difference
The Fick principle states that VO2 = CO × (CaO2 – CvO2), meaning oxygen consumption equals cardiac output multiplied by the arteriovenous oxygen content difference.