A Multicentre Pilot Study of Midline Catheter's Tip at a Different Position in Antimicrobial Therapy

The procedures ① evaluation and selection of blood vessels: select the puncture vein in the middle of the patient's upper arm, ② Skin disinfection and towel laying: take the supine position, extend the upper limb to be punctured 45 \~ 90 °, disinfect the pre punctured upper limb with 75% alcohol and 5% povidone iodine. ③ Puncture vein: tie a tourniquet to fill the vein. Before puncture, use 0.2 \~ 0.4 ml of 2% lidocaine for local anesthesia. Under the guidance of ultrasound, use the puncture needle in the improved sedinger assembly for puncture. After successful puncture, insert the guide wire. ④ Delivery and confirmation of catheter position: after successful puncture, insert the dilator catheter sheath assembly, withdraw the setinger guide wire, deliver the catheter, after catheter placement, flush and seal the catheter with normal saline, and fix the catheter with sterile dressing.