Objective:To retrieve, assess and summarize the best evidence for prevention and management of totally implantable venous access port blockage in malignant tumor patients.Methods:Literatures related to the prevention and management of infusion port blockage were searched by computer on BMJ Best Practice, UpToDate, Australian Joanna Briggs Institute Evidence-Based Health Care Centre Database, Guidelines International Network, National Guideline Clearinghouse, Cochrane Library, Ovid, PubMed, CNKI, Wanfang Database, VIP, Medlive, China Biomedical Medline Disc and other Chinese and English databases. The search period was from January 2013 to January 2023. Two researchers evaluated the quality of the literatures respectively, and the literatures that met the criteria were extracted, integrated and graded.Results:A total of 18 literatures were included, including 2 guidelines, 9 evidence summaries, 5 expert consensus articles and 2 systematic reviews. A total of 34 pieces of evidence were summarized from 6 aspects, including personnel training, nursing evaluation, catheter implantation, catheter maintenance, blockage management and health education.Conclusions:Summary of the best evidence for prevention and management of totally implantable venous access port blockage is comprehensive. Clinical medical staff should apply the evidence according to the medical situation to reduce the occurrence of blockage of infusion port.

Objective:To develop a risk assessment scale for infusion port occlusion in patients with malignant tumors and to test its reliability and validity.Methods:An initial item pool was constructed based on literature review. Through purposive sampling, two rounds of Delphi consultations with 20 experts were conducted from March to May 2023. Weights were assigned to the indicators using the analytic hierarchy process (AHP), and the risk assessment scale was finalized. From June to September 2023, a convenience sample of 278 malignant tumor patients with infusion ports from four Class Ⅲ Grade A hospitals in Shanxi Province was selected for item analysis and reliability and validity testing.Results:The risk assessment scale for infusion port occlusion in malignant tumor patients includes five dimensions, 16 primary indicators, and 35 secondary indicators. The content validity index at the scale level was 0.925, and at the item level ranged from 0.818 to 1.000. A total of five factors were extracted by exploratory factor analysis, with a cumulative contribution rate of 57.081% to the variance. The area under the receiver operating characteristic curve was 0.815, with a cutoff score of 24.50. The overall Cronbach's α coefficient was 0.910, and the split-half reliability coefficient was 0.762.Conclusions:The risk assessment scale for infusion port occlusion in malignant tumor patients demonstrates good reliability and validity, and has high predictive power, which provides a scientific basis for identifying high-risk populations in clinical settings.