"What is a peripheral IV (PIV)?"

"A peripheral IV, or PIV, is a short catheter (about 1 inch / 2.5 cm) placed into a small peripheral vein — usually in the forearm or hand — to give fluids, medications, blood products, or contrast. It is the most common vascular access device. It is intended for short-term use and for therapies that are not irritating to small veins; vesicants, high-osmolarity solutions, and long courses generally require a midline or central line instead."

"How do you care for and maintain a peripheral IV?"

"Keep the site clean and covered with an intact transparent dressing, secure the catheter to prevent movement, flush with normal saline before and after use to confirm patency (heparin is not needed for routine peripheral IVs), scrub the hub before each access, and assess the site at least every shift for pain, redness, swelling, or leaking. Replace the catheter when clinically indicated rather than on a fixed schedule, per current INS standards."

"What are the complications of a peripheral IV?"

"The most common peripheral IV complications are phlebitis (vein inflammation), infiltration (non-vesicant fluid leaking into tissue) and extravasation (vesicant leaking into tissue), occlusion, dislodgement, and — less commonly — local infection. Phlebitis and infiltration are the leading reasons a PIV fails before therapy is complete."

"How often should a peripheral IV be changed?"

"Current INS Infusion Therapy Standards of Practice support replacing peripheral IVs based on clinical indication — site assessment and device function — rather than routinely at a fixed interval such as every 72–96 hours. A well-functioning, asymptomatic site can remain in place, while any site with pain, redness, swelling, or dysfunction should be removed promptly."

"Does a peripheral IV need to be flushed with heparin?"

"No. Routine short peripheral IVs are maintained with normal saline flushes (the SAS approach — saline, administer, saline). Heparin locking is reserved for certain central venous access devices, not standard peripheral IVs."

Peripheral IV (PIV): Information, Care and Maintenance, and Complications

The peripheral IV (PIV) is the most frequently placed vascular access device in healthcare — and the foundation of the vascular access hierarchy. This reference covers what a PIV is, when to use it, site selection, care and maintenance, dwell and replacement, and peripheral IV complications.

Parent guide: Vascular Access: The Complete Clinical Reference

What is a peripheral IV?

A peripheral IV is a short peripheral catheter — roughly 1 inch (2.5 cm) — inserted into a small peripheral vein, most often in the forearm or the dorsum of the hand, to deliver fluids, medications, blood products, or contrast. It is intended for short-term therapy with solutions that are not damaging to small vessels.

A PIV is not appropriate for vesicant chemotherapy, parenteral nutrition, high-osmolarity (>900 mOsm/L) infusions, or therapies expected to run for many days — these require a midline or central venous access device. Choosing the right device up front is the heart of Vessel Health and Preservation.

Indications and site selection

Indications: short-term IV fluids, most IV medications, blood products, contrast, and bridging access.
Preferred sites: forearm veins (cephalic, basilic, median) — they support stability and longer dwell. Avoid areas of flexion (the antecubital fossa) when possible, the underside of the wrist, and veins in an extremity with lymphedema, AV fistula, or prior mastectomy.
Difficult IV access (DIVA): for patients with hard-to-find veins, use ultrasound guidance and structured vein assessment rather than repeated blind attempts. See Ultrasound-Guided Vascular Access.

Peripheral IV care and maintenance

Dressing: cover with a sterile transparent semipermeable dressing; replace if it loosens, becomes damp, or is soiled.
Securement: secure the catheter to limit movement, which reduces phlebitis and dislodgement.
Flushing: flush with normal saline before and after use to confirm patency and clear the lumen (SAS — saline, administer, saline). Heparin is not used for routine peripheral IVs.
Hub disinfection: scrub the needleless connector with alcohol or CHG for 15 seconds and let it dry before every access.
Assessment: assess the site at least every shift (more often for vesicants or in children) for pain, redness, swelling, induration, or leaking; document findings using a standardized phlebitis/infiltration scale.

Dwell time and replacement

Current INS Infusion Therapy Standards of Practice support replacing peripheral IVs when clinically indicated — based on site assessment and catheter function — rather than on a fixed routine schedule (the older “every 72–96 hours” rule). A well-functioning, asymptomatic site can remain; any symptomatic or dysfunctional site is removed promptly. Always remove a PIV as soon as it is no longer needed.

Peripheral IV complications

Complication	What it is	Action
Phlebitis	Inflammation of the vein wall (pain, redness, warmth, palpable cord)	Remove the catheter; apply warm compress; grade with a standardized scale → Phlebitis guide
Infiltration	Leakage of non-vesicant fluid into surrounding tissue (swelling, coolness)	Stop infusion, remove catheter, elevate; stage the injury → Infiltration & Extravasation guide
Extravasation	Leakage of a vesicant into tissue — a medical emergency	Stop immediately, follow the antidote/management protocol, escalate
Occlusion	Catheter won’t flush	Assess for kinking/clot; do not force; remove if unresolved
Dislodgement	Partial or complete catheter dislodgement	Remove, assess, replace at a new site as needed
Local infection	Redness, purulence at the site	Remove catheter; treat per policy

For full recognition, grading, and management of each, see Catheter Complications: Recognition, Prevention, and Management.

Patient education

Patients sometimes go home or to outpatient settings with a peripheral IV in place. Plain-language home guidance is in How to Take Care of Your IV at Home.