How to increase the success rate of indwelling needle insertion

An indwelling needle is a commonly used method for venous access in daily clinical practice, especially suitable for individuals requiring frequent or intermittent intravenous infusions. Placing an indwelling needle helps avoid repeated venipunctures. Below are the procedural steps for inserting an indwelling needle:

1. Select a large, straight vein with abundant blood flow, avoiding joints and venous valves.

2. Apply a tourniquet at an appropriate tightness—loose enough to allow one finger to fit underneath.

3. Disinfect vertically twice with antiseptic spray approximately 10 cm above the puncture site, then gently loosen the needle core.

4. Insert the needle directly into the vein at a 15–30 degree angle, advancing slowly.

5. Upon observing flashback of blood, lower the angle by 5–10 degrees and advance the needle an additional 0.2 cm.

6. Hold the "Y" connector with your left hand and withdraw the needle core approximately 0.5 cm with your right hand.

7. Use your right hand to advance the needle hub into the vein.

8. Slowly insert the catheter (outer sheath) fully into the vein.

9. Release the tourniquet, hold the "Y" connector with your left hand, and completely remove the needle core with your right hand.

Note: This procedure should only be performed under the guidance of a healthcare professional.