Implementing an Evidence-based, Standardized Care Bundle Targeting Register Nurses and Anaesthesiologists, to Enhance Patient Safety and Quality of Intravascular Access Devices Care Management - The Safe-IVADs Project. A Longitudinell Implementation Intervention With an Embedded Process Evaluation.

The goal of this observational study spanning over three years is to evaluate the effectiveness of implementing a co-designed, care bundle on intravascular access device (IVAD) quality and nurses and anaesthesiologist knowledge of IVADs best practices, at an intervention hospital compare to care as usual the a control hospital. Additional aims are to: 1. translate and validate a tool for identifying patients with difficult vein access within the Swedish healthcare context, 2. to evaluate the implementation related to its feasibility, acceptability, fidelity, and cost-effectiveness. The main questions it aims to answer are: * Does the implementation of evidence-based practices improve the quality of IVADs care, e.g. thrombophlebitis/phlebitis, extravasation, infiltration, dislodgement and increase register nurses and anaesthesiologists' knowledge of IVADs best practices? * Does the intervention bridge barriers to successful implementation and support routinization of evidence-based practices. * Which factors influence the implementation in terms of feasibility, acceptability, cost-effectiveness and compatibility with professionals' existing values and clinical workflows?