The goal of this implementation study is to learn if the CFIR-ERIC matching tool is effective indeveloping implementation strategies for pediatric nurse. The evidence practised in this study is the pediatric venous access device selection decision tree from clinical practice guideline on infusion therapy in children. The main questions it aims to answer are:

1. Does the implementation strategies developed by CFIR-ERIC matching tool improve nurses knowledge in venous access devices selection.
2. Does the implementation strategies developed by CFIR-ERIC matching tool lower the error rate of appropriate venous access device selection.

Researchers will compare the CFIR-ERIC group to a blank group to see if CIFR-ERIC matching tool works to improve nurses knowleged and lower the error rate of venous access device selection.

Participants will:

1. Receive the implementation strategies made by CFIR-ERIC matching tool.
2. Using the pediatric venous access device selection decision trees in daily catheterization.
3. Record their venous access device selection informantion, consumables usage and pediatric patients' outcome.

Currently，the evidence-based practice research often isolates barrier assessment from implementation strategy development. At tne same time, many implementation science models being overly complex for clinicians. In Chinese, certain studies still neglect barrier assessment, demonstrate inconsistent conceptualization of implementation strategies, and rarely classify developed strategies.

As a tool for matching and selecting implementation strategies, the CFIR - ERIC matching tool has the characteristics of strong pertinence, repeatability, structuring, systematization, and simple and convenient operation compared with other models. Researchers can identify barrier factors through CFIR and use the CFIR - ERIC matching tool to match strategies to promote the implementation of clinical intervention measures.

This implementation study adopted a pre-post design using the CFIR-ERIC Matching Tool to analyze barriers and develop strategies. Grounded in the "Pediatric Venous Access Device Selection Decision Tree" from the 2021 clinical practice guideline on infusion therapy in children, the intervention was rolled out across 21 wards at the Children's Hospital of Fudan University.

The implementation process of the evidence was evaluated from four aspects using the RE-AIM framework , including the evaluation indicators corresponding to each dimension of patient reach, intervention efficacy, medical adoption, and guideline implementation.

Inclusion Criteria:

• Having worked at the research site for ≥ 1 year;
• Being able to independently perform nursing operations (having completed the content related to intravenous infusion in the standardized training of this hospital and passed the assessment).

Exclusion Criteria:

• Not having obtained the nurse practice license;
• Refusing to participate in this study.