TITLE:
A Study on the Correlation between Peripheral Perfusion Index and Haemodynamic Fluctuations during the Induction Phase of Painless Gastroscopy in Adults
AUTHORS:
Wei Jiang, Kun Zhang
KEYWORDS:
Painless Gastroscopy, Peripheral Perfusion Index, Haemodynamics, Anaesthetic Induction, Hypotension, Early Warning
JOURNAL NAME:
Journal of Biosciences and Medicines,
Vol.14 No.7,
July
7,
2026
ABSTRACT: Objective: To investigate the dynamic changes in the peripheral perfusion index (PI) during the induction phase of anaesthesia for painless gastroscopy in adults, to analyse its correlation with haemodynamic fluctuations, and to evaluate the early warning value of PI for hypotension during the induction phase. Methods: A total of 219 patients scheduled for painless gastroscopy were selected and divided into three age groups: young adults (18 - 44 years), middle-aged adults (45 - 59 years), and young elderly (60 - 74 years), with 73 patients in each group. Intravenous anaesthesia was administered using a combination of propofol and sufentanil. PI, systolic blood pressure (SBP), diastolic blood pressure (DBP), and heart rate (HR) were recorded pre-anaesthesia (T0), upon completion of propofol administration (T2), upon loss of the eyelash reflex (T3), and upon awakening (T6). These four time points were the primary analytical time points. The maximum changes during the induction phase (ΔPI, ΔSBP, ΔDBP) were calculated, and Pearson correlation analysis and ROC curve analysis were performed to assess their predictive value. Results: Following anaesthetic induction, PI increased significantly, peaking between T2 and T3, whilst SBP and DBP decreased significantly and showed a significant negative correlation with PI (P Conclusion: During the induction phase of painless gastroscopy, PI provides a continuous, non-invasive, and early reflection of peripheral vascular tone and the state of sympathetic inhibition, and is significantly correlated with haemodynamic fluctuations; implementing stratified management using a warning threshold of PI = 3.65% (3.2% for the elderly) can improve the safety of outpatient anaesthesia.