The Main Content of This Study is to Use Virtual Reality Technology Combined With Local Anesthesia With Lidocaine Injection at Different Times to Reduce the Pain of PICC in School-age Children

Group B (Lidocaine injection after puncture): ①Download games in the VR headset in advance,The games last approximately 10-15 minutes. Games were selected based on children's preferences, and the VR headset was worn in the optimal state 5 minutes before catheterization.②Sterilized skin -maximum sterile barrier-ultrasound-guided puncture insertion of guidewire -local infiltration anesthesia with 2% lidocaine -broad skin, insertion of skin expansion sheath -insertion of catheter.

Group C (Lidocaine injection before puncture): Steps①was the same as in group B, After disinfecting the skin, local infiltration anesthesia was administered at the prepuncture site under ultrasound guidance using 0.5ml of 2% lidocaine. Approximately 2 minutes later, a skin puncture was performed and a guidewire was inserted. A broad incision was made to accommodate the torn vascular sheath for delivering the catheter to the predetermined length.