Validation of radial artery-based uncalibrated pulse contour method (PulsioFlex) in critically ill patients: A observational study.

Background: Because of their simplicity, uncalibrated pulse contour (UPC) methods have been introduced into clinical practice in critical care but are often validated with a femoral arterial waveform.

Objective: We aimed to test the accuracy of cardiac index (CI) measurements and trending ability from a radial artery with one UPC.

Design: An observational study.