Evaluation of perfusion index as an objective indicator of successful interscalene block

Authors

  • Pardeep Kumar Assistant Professor, Department of Anaesthesiology, Pandit Bhagwat Dayal Sharma Post Graduate Institute of Medical Sciences, Rohtak, Haryana, India https://orcid.org/0000-0002-6025-434X
  • Vandna Arora Assistant Professor, Department of Anaesthesiology, Pandit Bhagwat Dayal Sharma Post Graduate Institute of Medical Sciences, Rohtak, Haryana, India https://orcid.org/0000-0002-8179-8442
  • Akanksha Khatri Senior Resident, Department of Anaesthesiology, Pandit Bhagwat Dayal Sharma Post Graduate Institute of Medical Sciences, Rohtak, Haryana, India https://orcid.org/0000-0001-9863-8333
  • Suresh Kumar Singhal Senior Professor and Head, Department of Anaesthesiology, Pandit Bhagwat Dayal Sharma Post Graduate Institute of Medical Sciences, Rohtak, Haryana, India https://orcid.org/0000-0002-8993-9924
  • Shikha Madan Associate Professor, Department of Obstretics and Gynaecology, Pandit Bhagwat Dayal Sharma Post Graduate Institute of Medical Sciences, Rohtak, Haryana, India https://orcid.org/0000-0001-5206-6827

DOI:

https://doi.org/10.3126/ajms.v14i2.49867

Keywords:

Perfusion index; Interscalene; Nerve block; Ultrasound

Abstract

Background: Interscalene nerve blocks are commonly performed for surgeries of the upper limb. Assessment methods for evaluation of blocks are conventional and subjective.

Aims and Objectives: The aim of the study was to evaluate perfusion index (PI) as an objective indicator for assessing successful ultrasound guided interscalene block.

Materials and Methods: This prospective, observational study included adult patients undergoing upper limb surgery (humerus and shoulder) under USG guided interscalene nerve block. PI was recorded at baseline (before LA administration), at every 2 min till 10 min, and then every 5 min till 30 min after the block in both the arms. The PI values were compared between the blocked and unblocked arms at all observed time points. PI ratio was calculated as the ratio between PI at 15 min after block and the baseline PI.

Results: The PI increased significantly in the blocked limb after local anesthetic injection and there was a statistically significant difference in PI values between the blocked and unblocked arms at all-time points. Both PI and PI ratio at 15 min after injection showed a sensitivity and specificity of 100% for block success at cutoff values of 3.2 and 2.04, respectively.

Conclusion: PI maybe used as an objective indicator of successful interscalene nerve block. PI >3.2 and PI ratio >2.04 at 15 min are accurate predictors for block success.

Downloads

Download data is not yet available.
Abstract
95
PDF
207

Downloads

Published

2023-02-01

How to Cite

Pardeep Kumar, Arora, V., Akanksha Khatri, Suresh Kumar Singhal, & Shikha Madan. (2023). Evaluation of perfusion index as an objective indicator of successful interscalene block. Asian Journal of Medical Sciences, 14(2), 46–50. https://doi.org/10.3126/ajms.v14i2.49867

Issue

Vol. 14 No. 2 (2023)

Section

Original Articles

License

Copyright (c) 2022 Asian Journal of Medical Sciences

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Authors who publish with this journal agree to the following terms:

  1. The journal holds copyright and publishes the work under a Creative Commons CC-BY-NC license that permits use, distribution and reprduction in any medium, provided the original work is properly cited and is not used for commercial purposes. The journal should be recognised as the original publisher of this work.
  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).