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Journal of Biomedical Optics • Open Access

Examiner’s finger-mounted near-infrared spectroscopy is feasible to analyze cerebral and skeletal muscle oxygenation in conscious Chihuahuas
Author(s): Keisuke Hiwatashi; Kimiaki Doi; Risuke Mizuno; Makoto Yokosuka

Paper Abstract

To measure regional saturation of oxygen (rSO2) of hemoglobin and total hemoglobin index (HbI) in the brain (through the molera of the head) and skeletal muscle (musculus gracilis) of conscious Chihuahua dogs using an examiner’s finger-mounted near-infrared spectroscopy (NIRS) device, Toccare, we investigated brain and skeletal muscle NIRS in 48 Chihuahuas without severe disease. To measure rSO2 and total HbI, a Toccare probe was placed on the molera of the head and musculus gracilis of each dog for real-time recording. Stable NIRS values were obtained within 10 s. We also examined the effect of anesthesia on rSO2 and total HbI of a Chihuahua. Cerebral rSO2 values (59%±7%) were significantly lower than those obtained at femoral regions (67%±6%), whereas total HbI values in the brain (0.38±0.09) were significantly higher than those of the musculus gracilis (0.20±0.05). Sedation with a combination of medetomidine and ketamine decreased cerebral rSO2 along with a corresponding reduction in heart rate. Sevoflurane anesthesia with 100% O2 maintained rSO2 in the brain with an even lower heart rate. In conclusions, we measured brain and skeletal muscle rSO2 of hemoglobin in conscious Chihuahuas using a newly developed NIRS device, Toccare, and found that changes in cerebral oxygenation levels were associated with administration of anesthetics.

Paper Details

Date Published: 15 February 2017
PDF: 6 pages
J. Biomed. Opt. 22(2) 026006 doi: 10.1117/1.JBO.22.2.026006
Published in: Journal of Biomedical Optics Volume 22, Issue 2
Show Author Affiliations
Keisuke Hiwatashi, Nippon Veterinary and Life Science Univ. (Japan)
Animal Medical Ctr. of Gotemba Inter (Japan)
Kimiaki Doi, Doi Pet Clinic (Japan)
Risuke Mizuno, Univ. of Tsukuba (Japan)
Makoto Yokosuka, Nippon Veterinary and Life Science Univ. (Japan)

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