Safety and Effectiveness of CATHTONG™ II PICC

Inclusion Criteria:

* Subjects volunteered to participate in the trial and signed the informed consent.
* Age 18 years old, 80 years old; gender is not limited;
* Suitable for patients who need central venous catheterization via peripheral venipuncture (life expectancy is more than 6 months): need medium-term and long-term infusion or intravenous drug therapy; need multi-chamber infusion of multiple drugs at the same time; need infusion of irritating, corrosive or hyperosmotic drugs; hyperbaric angiography or central venous pressure monitoring function;
* Patients who need to be maintained in the investigator's hospital after PICC catheterization;
* Ability to communicate well with researchers and comply with test requirements.

Exclusion Criteria:

* Local infection of puncture vein or occlusion or serious lesion of blood vessel at puncture place;
* Patients with known or suspected allergies to polyurethane;
* Pre-intubation site includes trauma history, vascular surgery history, thrombosis history, radiotherapy history, bilateral breast cancer surgery affected upper limbs, superior vena cava compression syndrome, etc.
* The prothrombin time was 6 seconds longer than the normal value and the activated partial thromboplastin time was 2.5 times longer than the normal value.
* Pregnancy and lactation women;
* The subjects had a history of difficulty in catheterization.
* Patients with pacemaker implantation in vivo;
* Researchers do not consider it appropriate to participate in this clinical trial.