Subcutaneous Butterfly Needle: Duration, Care & Complications

A subcutaneous butterfly needle (winged infusion set) provides short-to-medium-term subcutaneous access for medications (insulin, furosemide, immunoglobulins, hydration, palliative drugs).

Typical Dwell Time

• Standard: 3–7 days (per INS/CDC guidelines for subcutaneous catheters).
• Extended: Up to 14 days with transparent dressing, no complications, stable site—per manufacturer IFU and facility policy.
• Not for long-term: >2 weeks → consider implanted port or PICC.

Site Care

1. Sterile insertion; rotate sites (abdomen, thigh, upper arm, back).
2. Transparent semipermeable dressing (Tegaderm, IV3000) changed q7d or PRN.
3. Flush per protocol (0.9% NaCl) before/after meds; heparin not needed for SQ.
4. Monitor q shift: redness, swelling, induration, leakage, pain, blanching.

Complications & Action

Sign	Action
Erythema >2 cm, warmth, purulence	Remove; culture; notify MD; consider antibiotics
Infiltration/leakage	Remove; restart new site
Pain disproportionate	Assess for nerve injury, infection; remove
Catheter dislodgement	Remove; apply pressure; new site

Patient Education

• Shower OK (cover dressing); no tub soaking.
• Report any site changes immediately.
• Activity modification to prevent snagging.

Butterfly needles improve comfort for intermittent SC therapies—vigilant monitoring keeps them safe.