The Effect of Skin Laxity on the PICC

To evaluate the clinical effect of tunneled PICC by comparing the rate of complications of the two groups of patients (tunneled PICC vs conventional PICC).

Inclusion Criteria:Patients ≥ 18 years old;Patients who need PICC catheterization according to the doctor's advice;There is no history of venous thrombosis, compression or blockage of superior vena cava, severe coagulation dysfunction and other contraindications for PICC catheterization;There is no serious cardiovascular disease, such as atrial fibrillation, pulmonary heart disease and other patients with abnormal P wave, and severe heart block before catheterizationPatients who have not participated in other clinical studies;Patients who voluntarily participate in this clinical study and can cooperate with clinical follow-upExclusion Criteria:Known allergy to catheter material;The puncture site has a history of infection, injury and radiotherapy;The puncture site has a history of venous thrombosis or surgery;Severe abnormal bleeding and coagulation function;Superior vena cava compression syndrome;Surgical side limbs of breast cancer patients undergoing radical mastectomy or axillary lymph node dissection;The ipsilateral limb of the pacemaker and the arteriovenous fistula;patient or her/his family members refuse to sign the informed consent form.