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
What is the standard target activated clotting time (ACT) before initiating cardiopulmonary bypass?
Answer: Greater than 400 seconds
An ACT greater than 400 seconds is required before initiating CPB to prevent clot formation in the bypass circuit.
Which cannulation site is most commonly used for arterial return during standard cardiopulmonary bypass?
Answer: Ascending aorta
The ascending aorta is the most common arterial cannulation site for CPB because it provides optimal flow and avoids retrograde perfusion risks.
What is the purpose of the cardiotomy reservoir in the CPB circuit?
Answer: To collect blood suctioned from the operative field
The cardiotomy reservoir collects blood suctioned from the operative field so it can be filtered and returned to the patient.
Which type of oxygenator is most commonly used in modern cardiopulmonary bypass circuits?
Answer: Hollow-fiber membrane oxygenator
Hollow-fiber membrane oxygenators are preferred in modern CPB because they minimize blood trauma and air emboli risk.
What is the typical target mean arterial pressure (MAP) during cardiopulmonary bypass for most adult patients?
Answer: 50–80 mmHg
A MAP of 50–80 mmHg is generally maintained during CPB to ensure adequate end-organ perfusion while minimizing bleeding risk.
Pulsatile flow during cardiopulmonary bypass is considered beneficial primarily because it:
Answer: Improves microcirculatory perfusion and reduces systemic vascular resistance
Pulsatile perfusion during CPB enhances microcirculatory flow and helps maintain normal vascular tone compared to non-pulsatile flow.