(1) Wash your hands, wear a mask, prepare things and bring them to the patient's bedside.

(2) Check the patient's name and inform the purpose of the operation.

(3) Measure the patient's upper arm circumference to see if it is consistent with the last time (recorded in the maintenance manual).

(4) Remove the fixing tape to completely expose the gray connector.

(5) Wipe the adhesive tape marks on the patient's skin with an alcohol cotton swab.

(6) Wash your hands again, remove the original connector, and disinfect the connector cross section, spiral mouth and skin with Aner iodine cotton swab (note that the disinfection cotton swab cannot disinfect the connector inner diameter).

(7) Pre-flush the new joint, connect it well, flush the catheter with pulse method, seal the pipe with positive pressure, and indicate the date of joint replacement.

(8) Remove the old film, observe whether the puncture point is red, swollen and oozing, and observe the length of the catheter.

(9) Open the dressing bag, pour iodophor and alcohol into the disinfection cup, and put the adhesive tape and sterile infusion paste into the sterile area.

(10) Put on gloves and put the sterile treatment towel under the patient's armpit.

(1 1) Disinfection at puncture point.

2. Precautions:

(1) Do not flush the catheter with normal saline containing blood and liquid medicine.

(2) Don't put the blue part of the catheter outside the membrane to prevent bacteria from entering the body after the catheter is damaged.

(3) Do not stick adhesive tape on the blue part of the catheter to avoid tearing the catheter.

(4) The contrast agent cannot be injected under high pressure.

(5) Always observe the number of catheter drops. If the number of drops slows down or the catheter is blocked, timely notify the professional catheter nurse to handle it accordingly.

(6) Observe the puncture point for redness, induration and exudation at any time, and handle it in time if found.

(7) Before use, the catheter must be X-rayed to determine its position.