Abstract
This paper presents the latest development of the hybrid microwave-optical thermoregulation monitor for the muscle. It is capable of warming the muscle and measuring the subsequent blood volume changes, using a novel microwave applicator with integrated optical probes. The challenge is to measure the thermoregulation response in deep tissue while minimizing any effect from the skin layer. We have introduced a skin cooling device, an additional integrated optical Laser Doppler flow monitoring probe and a temperature sensor to measure skin blood flow and temperature, respectively. The result shows that skin cooling is essential to minimize skin flow changes during microwave warming. The hybrid probe was placed on a human thigh to measure oxy/deoxy/total haemoglobin concentration changes (ΔHbO2/ΔHHb/ΔHbT), skin flux and temperature upon microwave warming. Without skin cooling, the skin temperature was elevated by 4 °C and both ΔHbO2/ΔHbT and skin flux increased, showing microwave warming occurring in both the skin and muscle. With skin cooling, the skin temperature was kept relatively constant. While ΔHbO2/ΔHbT increased, the skin flux was relatively stable, showing a preferential microwave warming in the muscle, rather than the skin.
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References
Johnson JM, O’Leary DS, Taylor WF et al (1986) Effect of local warming on forearm reactive hyperaemia. Clin Physiol 6(4):337–46
Herrick AL, Clark S (1998) Quantifying digital vascular disease in patients with primary Raynaud’s phenomenon and systemic sclerosis. Ann Rheum Dis 57(2):70–78
Song C (1984) Effect of local hyperthermia on blood flow and microenvironment: a review. Cancer Res 44:4721s–4730s
Al-Armaghany A, Tong K, Leung TS (2013) Development of a hybrid microwave-optical tissue oxygenation probe to measure thermal response in the deep tissue. Adv Exp Med Biol 789: 371–377
Cornejo A, Rodriguez T, Steigelman M et al (2011) The use of visible light spectroscopy to measure tissue oxygenation in free flap reconstruction. J Reconstr Microsurg 27(7):397–402
Gebuhr P, Jorgensen JP, Vollmer-Larsen B et al (1989) Estimation of amputation level with a laser Doppler flowmeter. J Bone Joint Surg 71-B(3):514–517
Duncan A, Meek JH, Clemence M et al (1995) Optical pathlength measurements on adult head, calf and forearm and the head of the newborn infant using phase resolved optical spectroscopy. Phys Med Biol 40(2):295–304
Liemert A, Kienle A (2011) Light diffusion in N-layered turbid media: steady-state domain. J Biomed Opt 15(2):025003
Acknowledgments
This work was partly funded by EPSRC (Grant Code EP/G005036/1). We would also like to thank Sonny Gunadi and Nick Everdell for building the NIRS monitor.
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Al-Armaghany, A., Tong, K., Leung, T.S. (2014). Development of a Hybrid Microwave-Optical Thermoregulation Monitor for the Muscle. In: Swartz, H.M., Harrison, D.K., Bruley, D.F. (eds) Oxygen Transport to Tissue XXXVI. Advances in Experimental Medicine and Biology, vol 812. Springer, New York, NY. https://doi.org/10.1007/978-1-4939-0620-8_46
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DOI: https://doi.org/10.1007/978-1-4939-0620-8_46
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