Authors:	Heimes, Diana Becker, Philipp Thiem, Daniel G. E. Kuchen, Robert Kyyak, Solomiya Kämmerer, Peer W.
Title:	Is hyperspectral imaging suitable for assessing collateral circulation prior radial forearm free flap harvesting? : Comparison of hyperspectral imaging and conventional Allen’s test
Online publication date:	12-Jan-2022
Year of first publication:	2021
Language:	english
Abstract:	This cross-sectional study aims to compare a new and non-invasive approach using hyperspectral imaging (HSI) with the conventional modified Allen’s test (MAT) for the assessment of collateral perfusion prior to radial forearm free flap harvest in healthy adults. (2) HSI of the right hand of 114 patients was recorded. Here, three recordings were carried out: (I) basic status (perfusion), (II) after occlusion of ulnar and radial artery (occlusion) and (III) after releasing the ulnar artery (reperfusion). At all recordings, tissue oxygenation/superficial perfusion (StO2 (0–100%); 0–1 mm depth), tissue hemoglobin index (THI (0–100)) and near infrared perfusion index/deep perfusion (NIR (0–100); 0–4 mm depth) were assessed. A modified Allen’s test (control) was conducted and compared with the HSI-results. (3) Results: Statistically significant differences between perfusion (I) and artery occlusion (II) and between artery occlusion (II) and reperfusion (III) could be observed within the population with a non-pathological MAT (each p 8 s, an impairment in reperfusion was shown (each p p < 0.01). (4) Conclusions: The results indicate a reliable differentiation between perfusion and occlusion by HSI. Therefore, HSI could be a useful tool for verification of the correct performance of the MAT as well as to confirm the final diagnosis, as it provides an objective, reproducible method whose results strongly correlate with those obtained by MAT. What is more, it can be easily applied by non-medical personnel. Keywords: hyperspectral imaging Allen’s test radial forearm free flap microvascular surgery microsurgery reconstructive surgery
DDC:	610 Medizin 610 Medical sciences
Institution:	Johannes Gutenberg-Universität Mainz
Department:	FB 04 Medizin
Place:	Mainz
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-6695
Version:	Published version
Publication type:	Zeitschriftenaufsatz
Document type specification:	Scientific article
License:	CC BY
Information on rights of use:	https://creativecommons.org/licenses/by/4.0/
Journal:	Journal of Personalized Medicine 11 6
Pages or article number:	531
Publisher:	MDPI
Publisher place:	Basel
Issue date:	2021
ISSN:	2075-4426
Publisher URL:	https://doi.org/10.3390/jpm11060531
Publisher DOI:	10.3390/jpm11060531
Appears in collections:	JGU-Publikationen