Midline Catheter Study

The purpose of this study is to conduct a prospective longitudinal cohort observational study to analyze the catheterization success rate, catheter dwell time, as well as the incidence and risk factors of related complications in pediatric patients of different age groups; to explore the suitability and application efficacy of this type of catheter in different disease types and treatment scenarios; to optimize the venous access selection strategy for hospitalized pediatric patients, formulate targeted catheterization and maintenance standards, provide theoretical evidence for clinical practice, and improve patients' medical experience.