1. In this study, the risk factors leading to catheter-related complications in the daily life behavior habits of patients with PICC catheter were identified, refined and initially established, and the Delphi method (expert consultation method) was used to further identify the existing and potential risk factors leading to PICC catheter-related complications in the daily life behavior habits of patients. To develop individualized and precise health education programs for risk factors, in order to build an accurate health education model centered on improving patients' daily life and behavior habits.
2. To conduct clinical empirical study to evaluate the feasibility and effectiveness of precise health education program for PICC patients with catheter, and to observe the impact of this health education model on the knowledge, attitude and practice level of daily management, self-management efficacy and the incidence of related complications after catheter insertion in PICC patients, so as to provide a reference for health education of PICC patients.

Inclusion Criteria:

• Cancer patients undergoing chemotherapy in our hospital with ≥6 cycles of chemotherapy;
• Patients with PICC implanted for the first time and maintained at our hospital;
• Aged 18-60 years;
• The material and performance of PICC catheter are silicone three-way valve catheter;
• Catheter placement under the guidance of portable color Doppler ultrasound diagnostic instrument;
• Clear consciousness, good language communication skills and normal comprehension ability;
• Informed consent and voluntary participation in the study.

Exclusion Criteria:

• Persons with self-care ability defects;
• Puncture times more than 1 time.