Huber coreless needle: 1, a special injection needle with the drug delivery chamber, its needle tip is specially designed bevel, not easy to damage the silicone rubber self-sealing membrane of the drug delivery chamber, so that the number of self-sealing membrane puncture can reach about 1500-2000 times 2, needle and extension tube can be maintained in the original puncture site 5-7 days Port catheter system maintenance of the use of proper use Coreless needles: 1. Choose the right length 2. Choose the right diameter according to the viscosity of the fluid 3. Feed the needle vertically, do not shake/tilt 4. Make sure the needle passes through the self-sealing membrane 5. Feed the needle towards the injection site protection: 1. Change the feed site slightly each time you puncture the skin with a coreless needle 2. Keep the coreless needle for 5-7 days of infusion: change the dressing for each infusion 3. After removal of the needle: disinfect the needle inlet site – compress the needle inlet site – remove the disinfectant – apply antibiotic ointment – -A sterile dressing to cover for 24 hours Catheter cleaning: 1. Heparin solution (100 Ul/ml) or saline (0.9% NaCl) is available. Most operating rules recommend that adults flush with 5 ml of 100 Ul/ml heparin solution each time 2. Maintain positive pressure in the catheter during cleaning to prevent blood reflux 3. Intermittent positive pressure flushing method – high density fluid (e.g., oil or glucose emulsion) 4. After each injection, the catheter must be flushed Catheter cleaning after blood sampling 1.Take 5ml of blood and discard it 2.Take the required blood 3.With 20ml of saline, intermittent positive pressure flushing 4.Inject 5ml of heparin solution (100 Ul/ml) positive pressure to seal the catheter When the catheter is not used for a long time, flush it once every 1-2 months (same as catheter cleaning)