Book contents
- Frontmatter
- Contents
- List of Contributors
- Foreword by Jean-Louis Vincent
- Preface
- Section 1 Hemodynamic Monitoring in the Perioperative Period
- Section 2 Basic Science & Concepts in Fluid Therapy
- Section 3 Practical Use
- Section 4 Future Directions
- 22 Optimizing Hemodynamic Therapy by Monitoring Microcirculation: One Step Forward in Matching Tissue Oxygen Delivery to Consumption
- 23 Predictive Analytics and Artificial Intelligence
- 24 Clinical Decision Support and Closed-Loop Systems for Goal-Directed Hemodynamic Therapy
- 25 Postoperative Surveillance: The Rise of Wireless Sensors, Pocket Ultrasound Devices and AI-Enabled Tools
- 26 Can Perfusion Index Be Useful for Fluid and Hemodynamic Management?
- Index
26 - Can Perfusion Index Be Useful for Fluid and Hemodynamic Management?
from Section 4 - Future Directions
Published online by Cambridge University Press: 11 April 2024
- Frontmatter
- Contents
- List of Contributors
- Foreword by Jean-Louis Vincent
- Preface
- Section 1 Hemodynamic Monitoring in the Perioperative Period
- Section 2 Basic Science & Concepts in Fluid Therapy
- Section 3 Practical Use
- Section 4 Future Directions
- 22 Optimizing Hemodynamic Therapy by Monitoring Microcirculation: One Step Forward in Matching Tissue Oxygen Delivery to Consumption
- 23 Predictive Analytics and Artificial Intelligence
- 24 Clinical Decision Support and Closed-Loop Systems for Goal-Directed Hemodynamic Therapy
- 25 Postoperative Surveillance: The Rise of Wireless Sensors, Pocket Ultrasound Devices and AI-Enabled Tools
- 26 Can Perfusion Index Be Useful for Fluid and Hemodynamic Management?
- Index
Summary
Photoplethysmography (PPG) has been extensively used for pulse oximetry monitoring in perioperative and intensive care. However, some components of PPG signal have been employed for other purposes, such as non-invasive hemodynamic monitoring. Perfusion index (PI) is derived from PPG signal and represents the ratio of pulsatile on non-pulsatile light absorbance or reflectance of the PPG signal. PI determinants are complex and closely interlinked, involving and reflecting the interaction between peripheral and central hemodynamic characteristics, such as vascular tone and stroke volume. Several studies have shed light on the interesting performances of this variable, especially for hemodynamic monitoring in perioperative and intensive care.
In the first section of this chapter the physiological and pathophysiological determinants of PI are exposed, along with relevant measuring techniques and potential limitations. Second, the existing data concerning the usefulness of PI in different clinical settings are presented and discussed. Lastly, we review known perspectives and identify new perceptions concerning the use of PI that should be explored regarding its utilization.
- Type
- Chapter
- Information
- Hemodynamic Monitoring and Fluid Therapy during Surgery , pp. 298 - 309Publisher: Cambridge University PressPrint publication year: 2024