Cardiopulmonary Bypass Techniques Flashcards
6 cards from real CSC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Cardiopulmonary Bypass Techniques flashcards as text
Protamine is given after cardiopulmonary bypass primarily to:
Answer: Reverse heparin anticoagulation
Protamine binds and neutralizes heparin, reversing anticoagulation after the patient is separated from CPB.
Which parameter best indicates adequate systemic oxygen delivery during cardiopulmonary bypass?
Answer: Mixed venous oxygen saturation (SvO2)
Mixed venous oxygen saturation reflects the balance between oxygen delivery and consumption, making it the best indicator of systemic perfusion adequacy during CPB.
What is the purpose of a left ventricular vent during cardiopulmonary bypass?
Answer: To prevent left ventricular distension and reduce myocardial work
The LV vent decompresses the left ventricle, preventing distension that can cause myocardial injury when the heart is arrested.
Systemic inflammatory response syndrome (SIRS) after CPB is primarily triggered by:
Answer: Contact activation from blood exposure to the bypass circuit
Contact of blood with the non-endothelial surfaces of the CPB circuit activates complement and inflammatory cascades, producing post-CPB SIRS.
Glucose management during cardiopulmonary bypass is important because hyperglycemia:
Answer: Worsens neurological outcomes and increases infection risk
Hyperglycemia during CPB is associated with impaired neurological outcomes and increased risk of wound infection, necessitating tight glycemic control.
Which flow rate is considered the standard index flow for normothermic cardiopulmonary bypass in adults?
Answer: 2.2–2.4 L/min/m²
An index flow of 2.2–2.4 L/min/m² is the standard for normothermic CPB, approximating normal cardiac index and ensuring adequate systemic oxygen delivery.