ABCP Perfusion Basic Science (PBSE) Practice Exam
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About this Exam
Prepare with the ABCP Perfusion Basic Science (PBSE) Practice Exam practice quiz. This question bank includes 10 questions covering circuit, relative, improperly, abcp, and perfusion. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.
Sample Questions
Question
1
Improperly placed venous cannula blocks which vessel?
Explanation:
When a venous cannula is placed improperly into a hepatic vein, it can block the liver’s outflow. The hepatic veins are the vessels that drain blood from the liver into the inferior vena cava (IVC) just below the diaphragm. If the cannula occludes a hepatic vein, hepatic venous drainage is impeded, causing blood to back up in the liver and impair hepatic perfusion during perfusion or bypass. Blocking the portal vein would affect inflow to the liver rather than its outflow, so it’s not the vessel whose obstruction is most likely from a misplaced venous cannula. The renal veins drain the kidneys into the IVC and are not directly involved in draining the liver. The IVC would affect systemic venous return broadly, but the question targets the specific hepatic drainage pathway, which is the hepatic vein.
Question
2
What measures prevent circuit air entrainment during CPB setup?
Explanation:
Preventing air from entering the bypass circuit starts with thorough priming, confirming all connections are leak-free, and venting the reservoir effectively to remove any trapped air before starting bypass. Proper priming displaces air with liquid, leak checks ensure the system is airtight, and active venting of the reservoir allows any rising air to escape, preventing bubbles from entering the pump and patient. Keeping the reservoir closed, using high suction, or avoiding venting would all increase the chance of air remaining or being drawn into the circuit, which is why those are not suitable.
Question
3
How should DO2 and SvO2 trends be interpreted during CPB?
Explanation:
Oxygen delivery must meet tissue oxygen demand on CPB, and SvO2 shows the balance between delivery and consumption. When DO2 is sufficient, tissues don’t extract as much O2 and SvO2 stays normal or increases. A rising SvO2 therefore points to adequate delivery or a reduction in oxygen extraction (for example from cooling or lower metabolic rate). Conversely, SvO2 falling suggests DO2 is inadequate or that tissues are extracting more O2 to meet demand. So interpreting trends this way—DO2 sufficient with SvO2 rising; SvO2 falling with potential DO2 insufficiency or high extraction—is correct. Rising SvO2 does not indicate tissue hypoxia; it typically argues against it.
Question
4
Which of the following best describes the protamine dose relative to heparin in reversal?
Explanation:
Protamine reverses heparin by forming a stable complex, and the dosing is guided by a rough 1:1 ratio by units of heparin given. For every 100 units of heparin, about 1 mg of protamine is used to neutralize it. This balance aims to stop excessive anticoagulation without tipping into protamine overdosage, which can cause its own adverse effects and even coagulopathy. So the best choice is 1 mg of protamine per 100 units of heparin. Under-dosing (less than 1 mg per 100 units) risks residual heparin and bleeding; over-dosing (more protamine than needed) risks adverse reactions and potential interference with clotting. In practice, the exact amount may be adjusted based on the patient’s response and intraoperative coagulation monitoring.
Question
5
Sufentanil potency relative to fentanyl?
Explanation:
The main idea is comparing how much drug is needed to achieve the same analgesic effect. Sufentanil is significantly more potent than fentanyl, meaning a much smaller amount produces the same pain relief. This is due to its higher affinity for mu opioid receptors and greater lipophilicity, which allow it to bind more effectively and reach receptor sites rapidly. In clinical practice, sufentanil is commonly considered about ten times more potent than fentanyl, so roughly one-tenth the dose of fentanyl can achieve a similar effect. Keep in mind that exact multipliers can vary by context and reference, but tenfold is the typical exam-standard figure. This higher potency is paired with rapid onset, so dosing must be precise to avoid overdose.
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ABCP Perfusion Basic Science (PBSE) Practice Exam
This practice set contains 10 questions from the matching question bank and focuses on circuit, relative, improperly, abcp, and perfusion. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.
This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.
Frequently Asked Questions
This quiz contains a total of 10 practice questions carefully selected to test your knowledge on this subject.
Yes, you will have exactly 0 minutes to complete the exam. A countdown timer will be visible once you start.
Yes, you can retake this practice test as many times as you need. The questions and options may be randomized on subsequent attempts to ensure comprehensive learning.
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