» Articles » PMID: 36589557

Detectability of Low-oxygenated Regions in Human Muscle Tissue Using Near-infrared Spectroscopy and Phantom Models

Overview
Specialty Radiology
Date 2023 Jan 2
PMID 36589557
Authors
Affiliations
Soon will be listed here.
Abstract

The present work aims to describe the detectability limits of hypoxic regions in human muscle under moderate thicknesses of adipose tissue to serve as a groundwork for the development of a wearable device to prevent pressure injuries. The optimal source-detector distances, detection limits, and the spatial resolution of hypoxic volumes in the human muscle are calculated using finite element method-based computer simulations conducted on 3-layer tissue models. Silicone phantoms matching the simulation geometries were manufactured, and their measurement results were compared to the simulations. The simulations showed good agreement with the performed experiments. Our results show detectability of hypoxic volumes under adipose tissue thicknesses of up to 1.5 cm. The maximum tissue depth, at which hypoxic volumes could be detected was 2.8 cm. The smallest detectable hypoxic volume in our study was 1.2 cm. We thus show the detectability of hypoxic volumes in sizes consistent with those of early-stage pressure injury formation and, consequently, the feasibility of a device to prevent pressure injuries.

References
1.
Cremasco M, Wenzel F, Zanei S, Whitaker I . Pressure ulcers in the intensive care unit: the relationship between nursing workload, illness severity and pressure ulcer risk. J Clin Nurs. 2012; 22(15-16):2183-91. DOI: 10.1111/j.1365-2702.2012.04216.x. View

2.
Stekelenburg A, Gawlitta D, Bader D, Oomens C . Deep tissue injury: how deep is our understanding?. Arch Phys Med Rehabil. 2008; 89(7):1410-3. DOI: 10.1016/j.apmr.2008.01.012. View

3.
Kallman U, Bergstrand S, Ek A, Engstrom M, Lindberg L, Lindgren M . Different lying positions and their effects on tissue blood flow and skin temperature in older adult patients. J Adv Nurs. 2012; 69(1):133-44. DOI: 10.1111/j.1365-2648.2012.06000.x. View

4.
van Beekvelt M, Borghuis M, van Engelen B, Wevers R, Colier W . Adipose tissue thickness affects in vivo quantitative near-IR spectroscopy in human skeletal muscle. Clin Sci (Lond). 2001; 101(1):21-8. DOI: 10.1042/cs20000247. View

5.
Delpy D, Cope M, van der Zee P, Arridge S, Wray S, Wyatt J . Estimation of optical pathlength through tissue from direct time of flight measurement. Phys Med Biol. 1988; 33(12):1433-42. DOI: 10.1088/0031-9155/33/12/008. View