IMR Press / RCM / Volume 23 / Issue 9 / DOI: 10.31083/j.rcm2309299
Open Access Original Research
Measurement of Revascularization Effect Using Near Infrared Spectroscopy in Below the Knee Arteries
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1 Faculty of Medicine, Vilnius University, LT-03101 Vilnius, Lithuania
2 Vilniaus Miesto Klinikinė Hospital, LT-10207 Vilnius, Lithuania
3 Department of Vascular Surgery, Zealand University Hospital, DK-4000 Roskilde, Denmark
*Correspondence: tomas.baltrunas@gmail.com (Tomas Baltrūnas)
Academic Editor: Grigorios Korosoglou
Rev. Cardiovasc. Med. 2022, 23(9), 299; https://doi.org/10.31083/j.rcm2309299
Submitted: 13 May 2022 | Revised: 21 July 2022 | Accepted: 5 August 2022 | Published: 5 September 2022
(This article belongs to the Special Issue Peripheral Arterial Disease)
Copyright: © 2022 The Author(s). Published by IMR Press.
This is an open access article under the CC BY 4.0 license.
Abstract

Objectives: Current methods evaluating tissue ischemia are based mainly on evaluating blood flow and not tissue perfusion. However, diabetes mainly affects small vessels and blood flow evaluation is insufficient. The aim of the trial was to evaluate the feasibility of NIRS in measuring perfusion changes during chronic total occlusion (CTO) revascularization in below the knee (BTK) arteries. Methods and Material: A prospective observational study was performed. During the endovascular revascularization procedure, tissue oxygenation changes were measured using three NIRS sensors. Postoperative angiographies and 30 days wound healing was evaluated. Results: The study enrolled 30 patients with chronic limb threatening ischemia, occluded below the knee arteries, Rutherford 5. Mean age 74.7 ± 11.2 years, 16 (53%) of the patients had diabetes mellitus, 10 (33%) had end-stage renal disease. A statistically significant NIRS rSO2 increase was observed on sensors near the wound after the revascularization, p = 0.001. Thirty days follow-up visits included 27 patients, because 3 patients had died. Comparing good wound healing group with poor wound healing group intraoperative NIRS rSO2 increase difference was statistically significant, p = 0.017. Conclusions: The study confirmed tissue perfusion increase could be detected using NIRS during revascularization of below the knee arteries. An intraoperative increase of NIRS rSO2 proved to predict wound healing results.

Keywords
near-infrared spectroscopy
blood perfusion
wound healing
chronic limb-threatening ischemia
below the knee
chronic total occlusion
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