- The Short Answer: Perfusion Basic Science Examination
- Where PBSE Sits in the CCP Pathway
- What the 11 Knowledge Areas Cover
- Format, Timing and Delivery
- What a Passing Score Actually Means
- What the Published Results Show
- Who Can Sit for It
- Fees, Windows and the Fall 2026 Calendar
- Sequencing Your Preparation by Domain
- What Passing Does and Does Not Give You
- Frequently Asked Questions
- PBSE stands for Perfusion Basic Science Examination, Part I of the ABCP process toward Certified Clinical Perfusionist (CCP).
- Passing PBSE alone does not award CCP; you must also pass CAPE, the separate Part II.
- The exam has approximately 220 multiple-choice items, a four-hour limit, and a passing scaled score of 400 on a 120-480 scale.
- The fee is USD 360, with a USD 100 late-application fee when applicable and a no-refund policy.
The Short Answer: Perfusion Basic Science Examination
If you landed here searching "what does PBSE mean," the answer for this site is specific: PBSE means Perfusion Basic Science Examination. It is the first of two examinations administered by the American Board of Cardiovascular Perfusion (ABCP) on the way to the Certified Clinical Perfusionist (CCP) credential. Perfusionists operate the heart-lung machine and related life-support equipment during cardiac surgery and other critical care procedures, and ABCP's examination process is how the profession verifies that a graduate has the foundational knowledge to practice safely.
The acronym is shared by other, unrelated credentials in other fields. Nothing on this page applies to them. Everything here concerns the ABCP examination that perfusion school graduates and final-term students take. For a deeper definitional treatment, you can also read What Is PBSE? and What Does PBSE Stand For?.
Where PBSE Sits in the CCP Pathway
ABCP certification is a two-part process. PBSE is Part I and emphasizes basic-science processes: the physiology, pharmacology, pathology, and engineering principles that explain why perfusion practice works the way it does. CAPE, the Part II examination, emphasizes application of that knowledge to clinical scenarios. CAPE has its own separate four-hour timer and is a distinct sitting.
The two exams draw on the same official knowledge base. The 11 content headings are shared between PBSE and CAPE, and all of them may be tested on PBSE. The difference is emphasis, not a different syllabus. That is why candidates who treat PBSE as "just memorization" often struggle: even a basic-science question may be framed around a perfusion-relevant mechanism.
| Feature | PBSE (Part I) | CAPE (Part II) |
|---|---|---|
| Full name | Perfusion Basic Science Examination | Separate Part II examination |
| Emphasis | Basic-science processes | Application |
| Knowledge base | Same 11 headings | Same 11 headings |
| Time limit | Four hours | Its own separate four-hour timer |
| Awards CCP on its own? | No | No; both must be passed |
What the 11 Knowledge Areas Cover
ABCP publishes 11 knowledge-base headings in its 2026 Examination Guidebook. No official percentage distribution was verified, so you should not assume any one area is the heaviest. Treat all eleven as fair game. The knowledge-base survey underlying these headings was last conducted in 2023. For a full walk-through, see PBSE Exam Domains 2026: Complete Guide to All 11 Content Areas.
Domain 1: Anatomy & Physiology
The foundation for everything else. Candidates should be able to reason about how circulation, gas exchange, and organ perfusion behave in health and during bypass.
- Cardiac and vascular anatomy relevant to cannulation and surgical exposure
- Hemodynamics, oxygen delivery, and the physiologic effects of non-pulsatile flow and hemodilution
- Renal, pulmonary, neurologic, and hematologic physiology as they respond to extracorporeal circulation
Domain 2: Pharmacology
Drug mechanisms, interactions, and the rationale behind agents used on and around bypass.
- Anticoagulation and its reversal, and how monitoring relates to dosing
- Vasoactive and inotropic agents and their receptor-level effects
- Cardioplegia constituents and why each component is included
Domain 3: Pathology
Disease states that create the need for surgery or complicate perfusion management.
- Congenital and acquired heart disease
- Coagulopathies and inflammatory responses to extracorporeal circulation
- Organ dysfunction pathways that perfusion strategy aims to prevent
Domain 4: Laboratory Analysis
Interpreting blood gases, coagulation measures, electrolytes, and related values, and linking results to corrective action.
- Acid-base and blood-gas interpretation
- Coagulation testing and what altered results imply
- Hematologic values and their relationship to hemodilution
Domain 5: Quality Assurance
Safety culture, documentation, and systematic approaches to reducing error in perfusion practice.
Domain 6: Devices & Equipment
How the circuit and its components work: pumps, oxygenators, heat exchangers, filters, cannulae, and reservoirs, plus the physical principles governing flow and pressure.
Domain 7: Clinical Management
Conducting bypass: initiation, maintenance, temperature management, myocardial protection strategy, and separation from bypass.
Domain 8: Special Patient Groups
Pediatric, neonatal, and other populations whose physiology changes circuit design and management decisions. This links to the pediatric case expectations in the eligibility rules below.
Domain 9: Special Procedures/Special Techniques
Procedures and techniques beyond routine bypass. Note that ABCP's undated certification summary uses a different label for this area than the versioned guidebook; this site follows the guidebook heading.
Domain 10: Catastrophic Events & Device Failure
Recognizing and responding to emergencies such as air in the circuit, oxygenator failure, pump failure, and other critical events. Expect reasoning about prevention and response sequence.
Domain 11: Monitoring
Which parameters are monitored during perfusion, what they tell you, and how to act on abnormal readings.
Format, Timing and Delivery
PBSE contains approximately 220 multiple-choice items with a four-hour testing limit. The word "approximately" is deliberate: ABCP does not state an exact question count, so avoid planning your pacing around a precise number. Instead, plan around the four-hour ceiling and the fact that questions may be presented in blocks.
Pearson VUE test centers deliver the examination, with Professional Testing, Inc. (PTI) supporting development and administration. Bring matching original, unexpired government-issued photo identification; a mismatch between your ID and your registration is an avoidable way to lose an attempt.
ABCP's relaunched official practice exams mirror this structure: block format, approximately half-length timing, domain-level feedback, and online calculator and whiteboard features. Those are descriptions of the practice product; they should not be read as a verified statement of the actual exam's calculator policy. Confirm tool availability directly in the current guidebook before test day. You can supplement official practice with our PBSE practice tests to rehearse the block-by-block pacing.
What a Passing Score Actually Means
The passing scaled score is 400 on a 120-480 scale, set using a criterion-referenced standard. That means you are measured against a fixed competency benchmark, not against other candidates, and there is no grading curve. ABCP does not publish a raw-percentage rule, so you cannot convert 400 into "I need X percent correct." For a focused treatment, see PBSE Passing Score 2026: Exactly What You Need to Pass.
A preliminary pass/fail result is issued at the test center. Final verified results are provided within six weeks. ABCP permits unlimited attempts, once per examination window, though separate state licensure rules may impose their own attempt limits if you need a state license to practice.
What the Published Results Show
ABCP's 2025 Annual Report publishes PBSE outcomes by administration and by candidate cohort. These are PBSE figures only, not CAPE statistics, and they do not add up to a single 2026 pass rate. Always read them with the administration and cohort attached.
| Administration | First-time candidates | All candidates | Repeat candidates |
|---|---|---|---|
| Spring 2025 | 74.4% (32/43) | 70.1% (54/77) | 64.7% (22/34) |
| Fall 2025 | 92.0% (242/263) | 89.4% (253/283) | 55.0% (11/20) |
Two patterns stand out. First, the Fall administration drew a far larger candidate group than Spring, which fits the usual graduation timing of perfusion programs, so the two administrations are not directly comparable in size. Second, repeat candidates passed at lower rates than first-time candidates in both windows. That does not tell you why, but it does suggest that retaking without changing your preparation approach is risky. For more context, see PBSE Pass Rate 2026: What the Data Shows and How Hard Is the PBSE Exam?.
Who Can Sit for It
ABCP eligibility normally requires graduation from an accredited perfusion program before testing, plus an official graduation transcript, a school clinical-competency statement, and a documented case record. You may apply while still enrolled, provided graduation precedes the examination date. Limited historic exceptions exist for pre-April 15, 1981 entrants and previously certified perfusionists.
The clinical case requirements
The detailed guidebook criteria take precedence over the simplified "75 CPB" wording found on the main PBSE page. The requirement is:
- At least 75 qualifying primary clinical perfusion activities
- Within those 75: five qualifying 3P ECMO or 6P VAD cases and at least 70 primary CPB cases
- At least 10 pediatric CPB cases performed or observed; performed pediatric cases may overlap the 75, but observations cannot count toward the 75
- Cases must occur in the US, its territories, or Canada
- An ABCP-certified CCP instructor must be physically present during CPB cases
Effective November 1, 2025, submitted case records require the instructor's full first and last name and CCP number, including the overseeing CCP for ECMO and VAD cases. Incomplete instructor information is a documentation problem you can prevent by collecting those details at the time of each case rather than reconstructing them later. The full breakdown lives in PBSE Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Fees, Windows and the Fall 2026 Calendar
The PBSE fee is USD 360, plus a USD 100 late-application fee when applicable. ABCP's published no-refund policy applies, so confirm your eligibility paperwork and your window before paying. A full cost picture, including preparation expenses, is in PBSE Certification Cost 2026: Complete Pricing Breakdown.
As of the research date of October 14, 2026, the current calendar lists the Fall 2026 window as October 20-24, 2026. An older figure in the 2025 Annual Report lists October 21-24, but the current calendar takes precedence. Applications for that window closed October 5, 2026, with a late fee applying after September 21, so the fall window is no longer open to new applicants.
Sequencing Your Preparation by Domain
Because ABCP publishes no domain weights, a sensible plan is to build from foundations upward rather than guessing which area is "worth more." The logic below ties the order to how the domains depend on one another. For a fuller method, see the PBSE Study Guide 2026, and keep the PBSE Cheat Sheet nearby for fast review.
Physiology, pharmacology, pathology
- Domains 1-3 underpin every later topic, so lock these in first
- Practice explaining why a drug or lesion changes hemodynamics, not just what it does
Laboratory analysis and devices
- Domains 4 and 6 convert theory into numbers and hardware
- Work blood-gas and coagulation interpretation by hand, since calculator availability on the real exam should be confirmed rather than assumed
Management, special groups, special techniques
- Domains 7-9 integrate earlier material into clinical decision-making
- Tie pediatric reasoning in Domain 8 to circuit and physiology differences
Safety, monitoring, and block-format practice
- Domains 5, 10, and 11 reward systematic thinking about prevention and response
- Finish with timed, block-style sets from our practice tests and ABCP's official practice exams, rehearsing the no-going-back rule
Because PBSE emphasizes basic-science processes, spend practice time on explaining mechanisms in your own words. If you can articulate why a change in one variable moves another, you are much better placed than if you only memorized values. Programs' own training resources are a natural complement.
What Passing Does and Does Not Give You
Passing PBSE does not award the CCP credential. You still need to pass CAPE. Only after both are passed is CCP awarded, and only then do maintenance obligations begin. Those obligations are CCP requirements, not additional PBSE content domains.
Standard CCP maintenance requires 40 clinical activities annually, including at least 25 primary and no more than 15 secondary activities, plus 45 CEUs per three-year cycle, with at least 15 Category I CEUs. New CCPs certified in the fall have a lighter first cycle: 20 activities, including at least 13 primary and no more than seven secondary, after which the standard 40-activity requirement resumes. Professional-activity CEU requirements are not prorated for that first cycle. Reporting periods end June 30, with reports due July 31. Note that ABCP's Booklet of Information shows conflicting edition versions, so these figures follow the live recertification pages.
On the career side, no PBSE-specific salary premium has been verified. Perfusionist pay is tied to the occupation, call arrangements, and eventual CCP status rather than to this single exam. If you are weighing the investment, PBSE Salary Guide 2026, Is the PBSE Certification Worth It?, and PBSE Jobs separate occupational pay from certification effects. For the overall credential picture, see PBSE Certification.
Key Takeaway
Think of PBSE as the basic-science gate to CCP, not the finish line. Plan your preparation across all 11 unweighted domains, rehearse block-style pacing, and confirm your window and paperwork well before the application deadline.
Frequently Asked Questions
On this site, PBSE stands for Perfusion Basic Science Examination, administered by the American Board of Cardiovascular Perfusion (ABCP) as Part I of the Certified Clinical Perfusionist (CCP) examination process.
No. Passing PBSE alone does not award CCP. You must also pass CAPE, the separate Part II examination, before the credential is awarded.
The exam has approximately 220 multiple-choice items with a four-hour testing limit. ABCP does not publish an exact question count, so plan around the time limit rather than a precise number.
A scaled score of 400 on a 120-480 scale, using a criterion-referenced standard. There is no grading curve and no published raw-percentage rule. Preliminary results appear at the test center, with final verified results within six weeks.
The fee is USD 360, plus a USD 100 late-application fee when applicable. A no-refund policy applies, so verify your eligibility and application window before paying.
ABCP permits unlimited attempts, once per examination window. Separate state licensure rules may limit attempts if you need a state license. Published results show repeat candidates passed at lower rates than first-time candidates in both 2025 administrations, so adjust your preparation before retesting.