Abstract
A multiphase study designed with Delphi and observational components was conducted to establish the preliminary validity and reliability of the 2018 Vascular Access Complication Staging and Treatment Instrument in pediatric and neonatal populations from a single, free-standing academic children's hospital. The instrument uses objective measurement criterion to determine the severity of swelling and tissue damage to inform treatment decisions. The results of the study provided preliminary empirical evidence to support a pediatric and neonatal intravenous complication staging instrument to assess degree of swelling and severity of tissue injury. The study also offered preliminary evidence that the instrument was perceived by the nurses who participated in the study to be efficient and easy to use.