COMPARISON OF THE PLETH VARIABILITY INDEX, PERFUSION INDEX, AND PULSE PRESSURE VARIABILITY FOR FORECASTING HYPOTENSION DURING LARGE ABDOMINAL OPERATIONS UNDER GENERAL ANAESTHESIA

Abstract

Background: The results of surgery may be adversely affected by transient hypotension after general anaesthesia. However,

there is a dearth of data in the literature currently available for evaluating relevant parameters in patients having significant

abdominal procedures.

Aim: The purpose of this study was to compare the predictability of hypotension following major abdominal operations

performed under general anaesthesia (GA) using the pulse pressure variability (PPV), pleth variability index (PVI), and

perfusion index (PI).

Methods: 280 adult patients undergoing major abdominal surgery under general anaesthesia were evaluated for this study.

PI, PPV, PVI, heart rate, and mean arterial pressure were measured in each patient at 1-minute intervals up to 20 minutes after

the introduction of anaesthesia. Hypotension was assessed at 5 and 15 minutes. Also, the best cut-off and diagnostic

performance were assessed for the prediction of dichotomous outcomes. Statistical significance was considered at p<0.05.