The hidden costs of running in-house perfusion are the ones that do not appear on the perfusion cost center: a staffing floor set by how many rooms run concurrently rather than by case volume, round-the-clock call coverage with a response standard attached, vacancy and turnover in a labor pool that produces only a few hundred new clinicians a year, certification maintenance that requires each perfusionist to log a minimum annual case count, capital and disposable purchasing at single-hospital scale, quality and data infrastructure, and the revenue exposure created when a program depends on two or three people. A comparison built on salary and benefits alone will miss all seven.

None of this means contracting is automatically cheaper. It means the usual comparison is not measuring the thing that differs.

Why the standard comparison fails – In-House Perfusion

The typical analysis lines up the fully loaded cost of employed perfusionists against a vendor’s proposed per-case or per-month rate, finds the vendor rate higher, and concludes that in-house is less expensive. The error is that the two numbers describe different scopes. The employed-staff figure captures compensation. The vendor figure captures compensation plus coverage guarantees, backup staffing, recruitment, credentialing, continuing education, quality infrastructure, and in many arrangements equipment and disposables. Comparing them directly is comparing a component to a system.

The correction is not to assume the vendor is cheaper. It is to build both sides at the same scope, which requires naming the costs the in-house model absorbs invisibly.

Hidden cost one: the staffing floor is set by rooms, not cases

This is the most consequential item and the one most often missed.

AmSECT’s Standards and Guidelines for Perfusion Practice separates practices that institutions “shall” meet, labeled Standards, from practices that institutions “should” follow, labeled Guidelines. The staffing model sits in the second category, and the distinction is worth preserving: Guideline 15.1 states that the “n+1” staffing model should be utilized at all times, where n equals the number of operating or procedure rooms in use at any given time at a single site. The accompanying note describes this as the minimum safe number of perfusion staff and gives an explicit example: if three operating or procedure rooms are concurrently in use, the minimum safe number of clinical perfusionists available to cover that level of activity is deemed to be four. Non-qualified staff members, including students and staff who have not completed training adequate to the activity, must not be included in that calculation.

Standby cases raise the number further, and here the language is stronger. Standard 14.2 states that one perfusionist shall be assigned for each standby procedure, and AmSECT has confirmed that standby cases count toward the required n. A hospital that identifies procedures preoperatively as being at elevated risk of converting to extracorporeal support is committing a dedicated perfusionist to each of them.

Read that carefully and the implication for low-volume programs becomes clear. A hospital performing 200 pump cases a year and a hospital performing 600 may need a similar staffing floor if both run two rooms concurrently on their busiest days. Case volume drives revenue. Concurrency drives cost. Programs that grew by adding a second room without adding perfusion staff have usually not saved money; they have moved the cost into a coverage risk that has not surfaced yet.

Any cost model that divides perfusionist salary by annual cases and calls the result a cost per case will systematically flatter high-concurrency, low-volume programs, which are precisely the programs where the in-house model is under the most strain.

Hidden cost two: call coverage carries a clock

AmSECT Guideline 15.2 states that an on-call perfusionist should be present and clinically ready for unscheduled and emergency procedures within 60 minutes of being called. AmSECT has declined to specify whether that window refers to travel time or pump-ready time, leaving centers to define it through internal service line discussion, which means the practical constraint your program adopts may be tighter than the guideline text.

Either way, that sentence converts call from a scheduling preference into a geographic and staffing constraint. It limits how far team members can live from the hospital, it constrains how thin a call rotation can be stretched, and it means a program cannot rely on a perfusionist who is already committed to another site.

The financial expression of this is call pay, overtime, and the compounding cost of a rotation carried by too few people. The clinical expression is that a program running a one-in-two or one-in-three call rotation is one resignation away from being unable to meet the standard. Neither expression appears on a salary line.

Hidden cost three: vacancy and turnover in a small labor pool

A 2019 survey of perfusionists in the United States, published in the Journal of ExtraCorporeal Technology in 2020, found an average vacancy rate of 12.3 percent and an average turnover rate of 14.7 percent across 484 qualifying responses. The author noted that in the registered nursing literature, vacancy rates at or above 11.1 percent fall into the highest category, which hospitals and healthcare workers subjectively described as severe, and concluded that the perfusion figures would be considered severe in other healthcare professions and would fall in the highest strata of workforce shortages.

Two caveats belong with those numbers. They are self-reported perceptions rather than audited payroll data, and the survey was not randomly distributed, so the author states plainly that the results cannot be statistically generalized to the entire population of perfusionists in the United States. They remain the most useful published national figures available, and the severity framing is borrowed from nursing benchmarks rather than derived for perfusion.

The supply side explains why those numbers persist. Using ABCP certification as a proxy, the same paper estimates roughly 4,000 certified clinical perfusionists nationwide, and observes that because the number is so small, any change in supply or demand can create far-reaching effects. It also notes that the United States Bureau of Labor Statistics does not track perfusionists at all, which is why hard workforce data in this field is scarce. There is no reserve of unemployed certified perfusionists waiting to be recruited. When a hospital loses one, it is competing for the same small pool as every other hospital and every contract provider.

For a cost model, the relevant figures are the ones your own organization can produce: average days to fill a perfusion vacancy over the last five years, locum or traveler rates paid during those gaps, overtime absorbed by remaining staff, and any cases deferred or transferred. Most hospitals have never assembled these, and the exercise itself is usually more persuasive than any vendor presentation.

Hidden cost four: low case volume threatens certification

A Certified Clinical Perfusionist must perform a minimum of 40 clinical activities annually to recertify with the American Board of Cardiovascular Perfusion, of which at least 25 must be documented as Table A primary clinical perfusion activities. Case credit for a primary activity goes only to the perfusionist responsible for the conduct of perfusion for 60 percent of the case, and only one perfusionist may claim primary status per case. A maximum of 15 activities may come from Table B secondary activities, which include first assistant, standby procedures, HIPEC, and simulation at a recognized center. CCPs recertify annually, and must also earn 45 continuing education units over each three-year reporting period, at least 15 of which must be Category I, meaning ABCP-approved perfusion meetings and related activity.

Now combine that with the n+1 staffing floor, and note that only one clinician can claim primary credit per case. A program covering three concurrent rooms carries a staffing floor of four perfusionists. At 200 pump cases a year distributed evenly, each clinician logs about 50 primary activities, which clears both thresholds comfortably. At 120 cases across the same four clinicians, each logs about 30 primary activities: still above the 25-case primary minimum, but 10 short of the 40-activity annual total, meaning every clinician must find ten additional qualifying activities from ECMO, VAD, NRP, standby cases, or simulation. Add a fifth perfusionist to that same 120-case program and primary activities fall to about 24 each, below the primary minimum.

The point is not that any particular program is at risk. It is that case volume per clinician, not case volume overall, is the number that governs recertification, and the n+1 floor sets a denominator the program does not fully control. The costs that follow are real and almost never modeled: travel and coverage expense to send clinicians elsewhere for cases, simulation fees at recognized centers, continuing education, and in the worst case a clinician who cannot recertify. Run the division for your own program before assuming it does not apply.

Hidden cost five: capital, disposables, and biomedical support

Heart-lung machines, cell salvage equipment, monitoring, and their service contracts are capital and maintenance obligations that sit in different budgets from the perfusion cost center, which is exactly why they are omitted from comparisons. Disposables are purchased at single-hospital volume. Equipment refresh cycles arrive as capital requests years after the staffing decision was made.

Contract providers that purchase across many hospitals have a genuine scale advantage on disposables and equipment. Whether that advantage is passed through, and how much of it, is a contract question, not a given. Ask any prospective partner to state explicitly which equipment and disposables are included in their rate and which the hospital continues to buy, and hold that answer next to your current supply spend for the same items.

Hidden cost six: quality, data, and competency infrastructure

Perfusion quality assurance is work: case data capture, outcome review, protocol maintenance, competency assessment, equipment checklists, and participation in continuing education. In an in-house department this work is distributed across a perfusion manager, a service line director, and quality staff, where it is rarely tracked as a perfusion cost. It is still being paid for.

The comparison question is not whether this work costs money, since it does either way. It is whether a two-person or four-person department can perform it at the same depth as an organization that does it across many sites, and whether the hospital’s current program actually is performing it. A hospital that has not reviewed perfusion outcome data in two years is not saving the cost of that review; it is deferring it.

Hidden cost seven: concentration risk

A four-person perfusion department is a single point of failure for an entire cardiac program. If two clinicians leave in the same quarter, the hospital faces a choice between paying emergency locum rates, reducing concurrent room capacity, or transferring cases. Cardiac surgery is high-revenue and difficult to recapture once referral patterns shift.

This is not a cost line. It is a risk, and it should be modeled as one, with an estimated probability and an estimated revenue exposure, rather than assumed away. Ask what fraction of your cardiac program’s annual contribution margin depends on the continued employment of three or four specific people.

What contracting does and does not solve

Contracted perfusion transfers recruitment, credentialing, coverage guarantees, continuing education, competency management, and in many cases equipment and disposables to a partner with a larger staffing pool to draw from. That is a real transfer of operational burden and a real reduction in concentration risk.

It does not eliminate cost, and it does not eliminate the underlying labor shortage. The same small national pool supplies both models. A contract provider manages the shortage by spreading clinicians across many sites and maintaining float capacity; it does not conjure additional perfusionists into existence. It also introduces its own considerations: contract term and termination provisions, what happens to currently employed hospital perfusionists, how rate escalation is handled, how the provider is held to clinical quality standards, and how disruption is managed during transition.

Those are legitimate questions to press hard on. A provider that cannot answer them specifically is not ready to be evaluated.

How to build an honest comparison

Build both models across every row. Use a three-year to five-year window rather than a single year, since vacancy, turnover, and equipment refresh are episodic and a one-year snapshot will land on a good year or a bad one by accident. Express the result as total cost of coverage rather than cost per case, then divide by cases at the end. Doing it in the other order hides the concurrency effect described above.

Where SpecialtyCare fits

SpecialtyCare employs more than 430 perfusionists nationwide and supports more than 75,000 heart procedures each year, with one out of every seven heart procedures in the United States performed with a SpecialtyCare perfusionist in the room. That scale is relevant to this discussion in three specific ways: it supplies the float capacity that makes coverage guarantees possible during vacancy and leave, it provides case volume across sites that supports clinician recertification requirements, and it enables purchasing of perfusion and ECMO equipment and disposables at a volume no single hospital reaches. SpecialtyCare captures patient care metrics and outcomes from every cardiac procedure it supports and maintains a large multi-institutional clinical database used to identify practice trends. SpecialtyCare is accredited and certified by The Joint Commission.

Whether a contracted model is right for a specific hospital depends on that hospital’s concurrency, volume, current vacancy history, and equipment position, which is why the comparison framework above matters more than any vendor claim.

If you are preparing a build-versus-contract analysis for your cardiac program, contact SpecialtyCare and ask for the cost categories in your model to be addressed line by line rather than in aggregate.

Frequently asked questions

What does the AmSECT n+1 staffing model actually say? It is Guideline 15.1 in AmSECT’s Standards and Guidelines for Perfusion Practice, which means AmSECT states it “should” be followed rather than “shall.” The guideline says the n+1 staffing model should be utilized at all times, where n equals the number of operating or procedure rooms in use at any given time at a single site, and describes this as the minimum safe number of perfusion staff. AmSECT’s worked example: three concurrent rooms means a minimum safe number of four clinical perfusionists. Students and staff without training adequate to the activity must not be counted. Separately, Standard 14.2 states that one perfusionist shall be assigned for each standby procedure, and AmSECT has confirmed standby cases count toward n.

How quickly must an on-call perfusionist be able to respond? AmSECT Guideline 15.2 states that an on-call perfusionist should be present and clinically ready for unscheduled and emergency procedures within 60 minutes of being called. AmSECT has stated that the guideline does not specify whether this means travel time or pump-ready time, and encourages centers to define it through internal service line discussion.

How many cases does a perfusionist need each year to stay certified? The American Board of Cardiovascular Perfusion requires a minimum of 40 clinical activities annually for CCP recertification, of which at least 25 must be Table A primary clinical perfusion activities. A maximum of 15 may come from Table B secondary activities. Primary case credit goes only to the perfusionist responsible for the conduct of perfusion for 60 percent of the case, and only one perfusionist may claim primary status per case. CCPs recertify annually and must earn 45 continuing education units across each three-year period, with at least 15 in Category I, meaning ABCP-approved perfusion meetings and related activity.

Is outsourcing perfusion cheaper than employing perfusionists? It depends on the hospital, and any provider claiming otherwise without seeing your numbers is guessing. The variables that determine the answer are concurrent room count relative to case volume, your actual vacancy and turnover history, whether your case volume comfortably supports recertification for your current headcount, your equipment refresh position, and your current disposable pricing. A hospital with high volume, low concurrency, stable staffing, and recent capital investment may find in-house is less expensive. A hospital with the opposite profile usually finds the reverse.

How large is the certified perfusionist workforce in the United States? There is no authoritative count, because the United States Bureau of Labor Statistics does not track perfusionists. Using ABCP certification as a proxy, a 2020 paper in the Journal of ExtraCorporeal Technology estimated approximately 4,000 certified clinical perfusionists nationwide, and noted that because the number is so small, any change in supply or demand can create far-reaching effects. The same survey reported an average vacancy rate of 12.3 percent and turnover of 14.7 percent, though it was a non-random sample and its author cautions that the results cannot be statistically generalized to all perfusionists. Because supply is constrained, the shortage affects hospital-employed and contracted models alike.

What happens to our current perfusionists if we contract the service? This is a contract term, not a fixed feature of the model, and it should be negotiated explicitly. Ask any prospective partner to describe in writing how currently employed hospital perfusionists are handled, including offer terms, seniority treatment, benefits comparison, and assignment location. Ask for references from hospitals that went through the same transition.

What is the single most common error in a build-versus-contract perfusion analysis? Dividing perfusionist salary by annual case count to produce a cost per case. That calculation assumes staffing scales with volume. It does not; it scales with concurrency. Build total cost of coverage first, then divide by cases.

Sources

• American Society of ExtraCorporeal Technology. Standards and Guidelines for Perfusion Practice (2023). https://amsect.org/Portals/0/2023%20AmSECT%20Standards%20and%20Guidelines%20for%20Perfusion%20Practice.pdf
• American Society of ExtraCorporeal Technology. Frequently Asked Questions to the AmSECT Standards and Guidelines. https://amsect.org/Portals/0/FAQ%20Frequently%20Asked%20Questions%20to%20the%20AmSECT%20Standards%20and%20Guidelines_docx.pdf
• American Board of Cardiovascular Perfusion. Clinical Activity requirements for recertification. https://www.abcp.org/recertification/clinical-activity
• American Board of Cardiovascular Perfusion. Professional Activity and continuing education requirements. https://www.abcp.org/recertification/professional-activity
• Results of the 2019 Survey on Perceptions of Vacancy and Turnover Among Perfusionists in the United States. Journal of ExtraCorporeal Technology, 2020. https://ject.edpsciences.org/articles/ject/pdf/2020/01/ject-52-27.pdf
• Commission on Accreditation of Allied Health Education Programs. Perfusion profession description and certification information. https://www.caahep.org/profession-description-and-certification-information/perfusion
• Accreditation Committee for Perfusion Education. https://ac-pe.org/
• SpecialtyCare. Perfusion service page. https://specialtycareus.com/services/cardiac/perfusion/