Measurement of optical reflection and temperature changes after blood occlusion using a wearable device
| Autor: | Mutsumi Okazaki, Itsuro Saito, Jian Gu, Takao Someya, Masaki Sekino, Yingyi Xiao, Yoko Tomioka, Koichi Kida |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Microsurgery
Materials science Ischemia lcsh:Medicine Free flap Free Tissue Flaps 01 natural sciences Temperature measurement Signal Article 010309 optics Wearable Electronic Devices 03 medical and health sciences 0302 clinical medicine 0103 physical sciences Occlusion medicine Animals Humans Postoperative Period Vascular Diseases lcsh:Science Monitoring Physiologic Multidisciplinary lcsh:R Temperature Time constant medicine.disease Electrical and electronic engineering Rats Cardiovascular diseases Regional Blood Flow 030220 oncology & carcinogenesis Curve fitting lcsh:Q Ligation Biomedical engineering |
| Zdroj: | Scientific Reports, Vol 10, Iss 1, Pp 1-13 (2020) Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | Early detection of compromised circulation is essential for postoperative monitoring of free flap. Hourly clinical check-ups such as inspection and palpation still result in a delay in detection. Conversely, optical reflection and temperature measurement are useful alternatives for detecting blood circulation. However, conventional methods that verify ischemia and congestion within a short period have not been reported. In this study, we measured short-term changes in optical reflection and temperature in a rat flap using a wearable flexible sensor probe previously developed in our laboratory. Five ischemia and five congestion groin flap models were measured using a sensor probe and reference devices. Curve fitting was performed on transition signals to evaluate changes in signals and their time constants. The optical reflection signal decreased after venous ligation and increased after arterial ligation. The parameters of the fitted curves indicate a significant difference between congestion and ischemia at p |
| Databáze: | OpenAIRE |
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