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. 2023 Nov 20;10(2):101369.
doi: 10.1016/j.jvscit.2023.101369. eCollection 2024 Apr.

Intraprocedural application of a peripheral blood flow monitoring system during endovascular treatment for femoropopliteal disease

John G Winscott  1 , Greg Stanley  2 , Eric Scott  3
Affiliations

Intraprocedural application of a peripheral blood flow monitoring system during endovascular treatment for femoropopliteal disease

John G Winscott et al. J Vasc Surg Cases Innov Tech. .

Abstract

Sensors that implement laser speckle image streaming provide real-time, noninvasive assessment of peripheral blood flow during endovascular revascularization. This single-center feasibility study evaluated a laser speckle-based peripheral blood flow monitoring system in 24 patients with peripheral arterial disease. System-quantified blood flow values showed improvement at the conclusion of the procedure in 20 of 24 patients (83.3%). Of the four patients without improved flow values, waveform morphology improved in three. Waveforms graded as moderate to severe peripheral arterial disease decreased from 71% before the procedure to 25% after the procedure, with improvement in 19 of 24 patients. In this limited population, laser speckle imaging could offer a highly sensitive method of detecting intraprocedural pedal blood flow changes.

Keywords: Angioplasty; Blood flow; Chronic limb threatening ischemia; Laser speckle imaging.

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Conflict of interest statement

J.G.W. declares consulting agreements with Cardiva, W.L. Gore & Associates, Medtronic, and Shockwave Medical. G.S. declares consulting agreements with Medtronic and Boston Scientific. E.S. declares consulting agreements with Medtronic and Boston Scientific.

Figures

Fig 1
Fig 1
Four-level grading system for waveform characterization. PAD, Peripheral arterial disease. Defined by Rumwell and McPharlin in 1998, and reproduced, with permission, from Lewis et al, under the terms of a Creative Commons Attribution-NonCommercial 3.0 License.
Fig 2
Fig 2
Flow values before and after the endovascular procedure. A, Flow values in all 24 patients. Bars from top to bottom are maximum, quartile 3, median, quartile 1, and minimum. The mean is shown with an X. B, Mean follow values before and after the procedure stratified by baseline Rutherford clinical class (RCC).
Fig 3
Fig 3
Flow values and morphology before and after the endovascular procedure. A, Individual participants shown using a log-2 scale before and after the revascularization procedure. B, Waveform morphologies before and after the endovascular procedure.
Fig 4
Fig 4
A, A generic example of the FlowMet Peripheral Blood Flow Monitoring System screen (Medtronic). B, An example waveform before the procedure. C, An example waveform after the procedure.
See this image and copyright information in PMC

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