Medical Perfusion Technology: What Hospital Leaders Need

Medical Perfusion Technology: What Hospital Leaders Need

Medical perfusion technology is the equipment and expertise used to keep blood moving and oxygenated when a patient's heart or lungs cannot do the job. It includes the heart-lung machine used during cardiac surgery and extracorporeal membrane oxygenation (ECMO) used in intensive care. Trained clinicians called perfusionists run these systems alongside surgeons and anesthesiologists.

This article is for hospital executives, service line leaders and clinical engineering teams who need a working understanding of perfusion services, the evidence behind them and the operational questions they raise. It follows the same approach as our briefing on wound care technology for healthcare leaders.

Key takeaways

  • A perfusionist operates heart-lung machines and related technology to keep patients stable during heart surgery and other procedures, working with surgeons and anesthesiologists.
  • Venoarterial (VA) ECMO supports both heart and lungs; venovenous (VV) ECMO supports the lungs only.
  • To sit for the American Board of Cardiovascular Perfusion exams, candidates must graduate from a CAAHEP/AC-PE accredited perfusion program.
  • The EOLIA trial of ECMO for severe ARDS reported 35% 60-day mortality with ECMO versus 46% with conventional care, a difference that did not reach statistical significance.
  • Results for ECMO-assisted CPR differ sharply between a single expert center (ARREST) and a multicenter trial (INCEPTION), which makes program experience central to outcomes.

What does a perfusionist do?

A perfusionist runs the machines that temporarily take over circulation and gas exchange, and monitors the patient's blood throughout. Cleveland Clinic describes perfusionists as operating heart-lung machines and other technologies under the direction of anesthesiologists and surgeons, with training that covers cardiopulmonary bypass, mechanical circulatory devices, autotransfusion and blood gas, hematocrit and coagulation testing.

Key terms, defined plainly:

  • Perfusion: the delivery of blood to the body's tissues.
  • Cardiopulmonary bypass (CPB): using a heart-lung machine to route blood outside the body during surgery so the surgeon can work on a still heart.
  • Oxygenator: the component that adds oxygen to blood and removes carbon dioxide.
  • Cannula: a tube placed in a blood vessel to carry blood to and from the circuit.
  • Autotransfusion: collecting and returning a patient's own blood lost during surgery.

In the United States, the credential most hospitals look for comes from the American Board of Cardiovascular Perfusion (ABCP). ABCP states that eligibility for its examinations requires graduation from a perfusion program accredited through CAAHEP and its Accreditation Committee for Perfusion Education (AC-PE). Some states also license perfusionists, so check your state's rules when credentialing.

How does a heart-lung machine work?

The heart-lung machine drains blood from the patient, oxygenates it, controls its temperature and pumps it back, so the brain and organs keep receiving oxygen while the heart is stopped or bypassed.

MedlinePlus explains that during bypass surgery, the machine reroutes blood from the heart so the brain and other vital organs still get adequate circulation. A typical circuit includes a venous reservoir, a pump, an oxygenator with a heat exchanger, arterial filters, and sensors for pressure, flow, temperature and blood gases.

Practice standards matter as much as hardware. The American Society of ExtraCorporeal Technology publishes Standards and Guidelines for Perfusion Practice, most recently updated in 2023 for adult practice and 2025 for pediatric and congenital practice. AmSECT describes them as setting the minimum requirements for safe cardiopulmonary bypass, with standards being mandatory and guidelines recommended. Its implementation toolkit includes an oxygen delivery (DO2) reference chart, reflecting interest in goal-directed perfusion, which means adjusting pump flow to meet oxygen delivery targets rather than relying on fixed formulas.

What is ECMO, and how is it different from bypass?

ECMO is longer-term life support, delivered in intensive care for days, rather than the hours of support used in the operating room. It buys time for the heart or lungs to recover or for another treatment.

The Extracorporeal Life Support Organization (ELSO) describes two main types:

FeatureVenoarterial (VA) ECMOVenovenous (VV) ECMO
SupportsHeart and lungsLungs only
Blood pathDrained from a large vein, returned to a large arteryDrained from and returned to veins near or in the heart
Patient's heartMay be too weak to pumpMust pump well enough on its own
Typical usesCardiogenic shock, cardiac arrest, failure after heart surgerySevere respiratory failure such as ARDS

Cleveland Clinic notes that VA-ECMO is a bridge, not a treatment on its own, that patients typically stay on it about five to seven days, and that risks include bleeding, blood clots, brain injury, pulmonary edema, infection and kidney damage. If weaning fails, options include a ventricular assist device, transplant or palliative care.

Compared with cardiopulmonary bypass, ECMO runs at the bedside for days, which means the hospital needs round-the-clock specialist coverage, not just an operating room team.

What does the evidence say about ECMO and patient outcomes?

The evidence supports ECMO in carefully selected patients treated by experienced teams, but trial results are mixed and depend heavily on setting.

TrialPopulationResultCaveat
EOLIA249 patients with severe ARDS60-day mortality 35% with ECMO vs 46% with conventional care (P=0.09)28% of control patients crossed over to rescue ECMO
ARREST30 patients with refractory out-of-hospital VF cardiac arrestSurvival to discharge 43% with ECMO-facilitated resuscitation vs 7% with standard careSingle expert center, stopped early
INCEPTION134 analyzed patients with refractory cardiac arrest30-day survival with good neurologic outcome 20% with ECPR vs 16% with conventional CPR (P=0.52)Multicenter; only 66% of the ECPR group received it

The figures above come from the European Society of Intensive Care Medicine's review of EOLIA, the Society of Critical Care Medicine's appraisal of ARREST and a summary of INCEPTION, published in the New England Journal of Medicine in 2023. The ESICM reviewers called EOLIA underpowered and said it did not settle whether ECMO is superior, while finding no sign it is dangerous in selected patients treated by trained teams. The SCCM appraisal of ARREST stressed that its results came from a single center with an experienced team and may not carry over to lower-volume programs.

For a hospital leader, the takeaway is practical: outcomes appear to depend on patient selection, speed and team experience as much as on the device itself. ELSO's registry reports give participating centers a way to benchmark their outcomes against peers.

What should hospital leaders plan for in a perfusion program?

Plan for people first, then equipment, data and governance. A perfusion service is a 24-hour clinical commitment, not a capital purchase.

A planning checklist:

  1. Staffing and call coverage. Decide whether perfusion is in-house or contracted, and how many credentialed perfusionists you need for surgery, ECMO and on-call coverage without unsafe fatigue. Our article on healthcare staff shortages covers recruitment and retention levers.
  2. Credentialing. Verify ABCP certification and any state license, and track recertification dates.
  3. Standards adoption. Map your protocols to the AmSECT standards, including checklists and safety devices.
  4. Equipment lifecycle. Budget for pumps, consoles, oxygenators, heater-coolers and backup units, plus service contracts. Clinical engineering should own preventive maintenance records; see our note on the medical device repair exemption for the right-to-repair context.
  5. Data and documentation. Capture perfusion records electronically and integrate them with the electronic health record, so pump data, labs and medications sit in one timeline.
  6. ECMO program governance. Define who can initiate ECMO, selection criteria, transport arrangements and when to refer to a higher-volume center.
  7. Vendor and contract risk. If perfusion staff or devices come from third parties, assess them as you would any critical supplier. Our guide to third-party risk management in healthcare applies.
  8. Quality review. Track complications, adverse events and outcomes, and feed them into your patient safety program.

When this does not apply

Not every hospital should run ECMO. A community hospital without cardiac surgery may be better served by fast referral and transport agreements with a regional ECMO center than by building a low-volume program. Likewise, recent technology claims from vendors, such as smaller circuits or new monitoring features, should be judged on published evidence and your own team's capacity to use them, not on brochure promises. The same applies to predictive or AI-based monitoring tools; our CIO guide to AI and ML in healthcare covers how to evaluate them. This article is general information about hospital services, not medical advice for any patient.

Frequently asked questions

Is a perfusionist a doctor?

No. A perfusionist is a specialized allied health professional, not a physician. In the United States, most complete an accredited perfusion education program and earn certification through the American Board of Cardiovascular Perfusion. Perfusionists work under the direction of surgeons and anesthesiologists, operating the heart-lung machine and related equipment and monitoring the patient's blood during procedures.

How long can a patient stay on ECMO?

It varies by condition and response. Cleveland Clinic notes that patients on VA-ECMO typically stay about five to seven days before weaning begins, though some need longer. ECMO is a bridge, so the team is always working toward recovery, a longer-term device, a transplant or, if none is possible, a decision about comfort-focused care.

What is the difference between ECMO and a heart-lung machine?

Both move blood outside the body to add oxygen and remove carbon dioxide. A heart-lung machine supports a patient for hours during surgery in the operating room. ECMO uses a simpler circuit to support patients for days in intensive care while the heart or lungs recover. ECMO can be venoarterial, supporting heart and lungs, or venovenous, supporting lungs only.

Does ECMO improve survival?

In selected patients treated by experienced teams, it can. Trials show a mixed picture: EOLIA found lower mortality with ECMO in severe ARDS that did not reach statistical significance, ARREST found a large survival benefit for cardiac arrest at one expert center, and the multicenter INCEPTION trial did not. Patient selection and program experience appear to drive results.

What to do next

  1. Ask your perfusion lead for a one-page summary of staffing, call coverage and credential status.
  2. Compare your perfusion protocols against the current AmSECT Standards and Guidelines and close any gaps.
  3. Review whether your hospital should run ECMO in-house or formalize referral and transport with a regional center.
  4. Check that perfusion records flow into your EHR and that outcomes are reviewed in your quality program.

Sources

Last reviewed: October 2026.

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