Subcutaneous Injection Technique: 45-Degree Angle Guide

Subcutaneous Injection: Correct Needle Angle & Technique

Subcutaneous (SC) injections deliver medication into the fatty tissue layer between skin and muscle. Standard angle: 45° (up to 90° for patients with more adipose tissue).

Step-by-Step Technique

1. Prepare: Verify order, patient, medication, dose, expiration. Wash hands, don gloves.
2. Select site: Abdomen (2" from umbilicus), anterior/lateral thigh, posterior upper arm, upper outer buttock, scapular area. Rotate sites.
3. Cleanse: Alcohol swab, 2-inch circle, allow to dry.
4. Pinch: Grasp 1-2 inches of skin/subcutaneous tissue between thumb and forefinger.
5. Insert: Hold syringe like dart, bevel up. Insert at 45° angle (90° if ample tissue) with quick, smooth motion.
6. Aspirate: Pull back slightly—no blood should appear (if blood, withdraw, change site).
7. Inject: Slow, steady plunger depression.
8. Withdraw: Smooth, quick removal at same angle.
9. Post-care: Don't massage (except heparin/insulin per protocol). Apply gentle pressure if bleeding. Activate safety device. Dispose in sharps container.
10. Document: Site, medication, dose, patient response.

Common SC Medications

• Insulin, heparin, enoxaparin, vaccines, biologics, growth hormone, epinephrine (auto-injector)

Troubleshooting

• Bruising: Apply pressure longer, avoid aspirin/NSAIDs if possible
• Pain: Room temp medication, sharp needle, quick insertion, rotate sites
• Lipohypertrophy: Rotate sites systematically, avoid repeated same spot