Infusion and vascular access nursing covers two related jobs: getting reliable access into a patient's circulation and keeping it working, and delivering therapy through it.
The specialty exists because vascular access is deceptively consequential. A poorly chosen or poorly maintained line causes bloodstream infection, thrombosis, extravasation injury, and — in patients who will need access for years — the exhaustion of usable veins.
Vascular access teams
Many hospitals run a dedicated team, and its work is device selection as much as insertion.
Peripheral catheters, including ultrasound-guided placement for patients with difficult access, which is the skill that turns a repeated failure into one attempt.
Midline catheters, longer peripheral devices for therapy of intermediate duration.
Peripherally inserted central catheters, placed at the bedside by specially trained nurses under ultrasound with tip-location technology. This is one of the clearest cases of a procedure moving from physicians to nurses, and it moved because nurse-led teams demonstrated better first-attempt success and lower infection rates.
Care and maintenance of central lines and implanted ports — dressing changes, needleless connector practice, flushing, and troubleshooting occlusion.
The team's most valuable output is often a recommendation rather than a device: matching the catheter to the therapy, its expected duration, and the patient's vein anatomy, and declining to place a central line that is not needed. Every day a central line stays in adds infection risk, and daily review of necessity is a core prevention measure. See infection prevention nursing.
Infusion therapy
The therapy side spans settings that look nothing alike:
- Hospital infusion of antibiotics, chemotherapy, blood products, and parenteral nutrition.
- Ambulatory infusion centres treating immune, neurological, and inflammatory conditions with biologics and immunoglobulin — a fast-growing part of the field. See ambulatory care nursing.
- Home infusion, where the nurse teaches a patient or family to run therapy themselves and visits to reassess. See home health nursing.
- Oncology infusion, which is its own specialty. See oncology nursing.
The clinical risks are consistent across all of them: infiltration and extravasation, phlebitis, catheter occlusion and breakage, air embolism, infusion reactions and anaphylaxis, and medication error at the point of administration.
Standards and certification
The specialty's professional society publishes infusion therapy standards of practice that function as the reference for institutional policy and are cited in litigation over line-related injury. They cover site selection, device choice, dressing and connector practice, flushing, dwell times, and complication management.
The credential is the CRNI, from the Infusion Nurses Certification Corporation. Eligibility requires a current unrestricted registered nurse licence and at least 1,600 hours of infusion therapy experience within the past two years — which may include education, administration, or research within the specialty, not only bedside practice. The credential runs on a three-year cycle, and recertification requires 1,000 hours of infusion experience within the last three years plus either re-examination or 40 recertification units of continuing education.
A separate board-certification in vascular access is open to several disciplines and is common among members of dedicated access teams.
The economics
Vascular access teams are one of the few specialist nursing services with a clean business case. Central line-associated bloodstream infection is publicly reported and carries payment penalties, so a team that lowers the rate, reduces failed insertion attempts, and shortens delays to therapy pays for itself in a way the finance department can follow.
That is also its vulnerability. Teams established during a push on infection rates are among the first services cut when the rate has been low for a while — after which it stops being low.
Related
- Infection prevention nursing
- Oncology nursing
- Home health nursing
- Nephrology and dialysis nursing
- Nursing specialties
Sources
- CRNI Certification: Frequently Asked Questions — Infusion Nurses Society, on eligibility hours and what experience counts. Accessed September 9, 2026.
- CRNI Recertification — Infusion Nurses Society, on the three-year cycle, 1,000-hour requirement, and recertification units. Accessed September 9, 2026.
- National Healthcare Safety Network — Centers for Disease Control and Prevention, on reporting of central line-associated bloodstream infection. Accessed September 9, 2026.