Catheter sealing method for negative pressure indwelling needles

Indwelling needles, also known as intravenous (IV) indwelling catheters, can reduce pediatric patients' pain and fear associated with repeated venipuncture. To ensure proper function for subsequent treatments, catheter sealing is essential. Negative-pressure sealing of indwelling needles is a commonly used method, and the specific procedure is as follows:

1. Preparation before sealing: Assess the patient's condition to confirm that intravenous infusion has been completed. Check the site of the indwelling needle for any abnormalities such as leakage, redness, swelling, or pain. The operator should perform hand hygiene, wear a mask, and draw up the appropriate sealing solution.

2. Disinfection: Using the right hand, grasp a pair of forceps holding a cotton ball soaked in disinfectant, and thoroughly disinfect the needle-free connector or heparin cap of the indwelling catheter.

3. Injection of sealing solution: After allowing the disinfectant to dry completely, insert the syringe needle into the indwelling catheter to two-thirds of its depth. Use a pulsatile technique to inject 4 mL of sealing solution, then while slowly withdrawing the needle, continue injecting the remaining 1 mL.

4. Securing the catheter: After injection, clamp and secure the external extension tubing by folding it back on itself, and inform the patient or caregiver about relevant post-procedure precautions.

Note: Sealing of indwelling needles must be performed by qualified healthcare professionals. Improper or self-directed attempts may lead to complications such as catheter occlusion or catheter-related bloodstream infections.