Dynamic analysis of a small artery of a human finger by optical coherence tomography

Mitsuo Kuwabara; Natsuki Takahashi; Daisuke Takada; Masato Ohmi; Masamitsu Haruna

doi:10.1117/12.873718

11 February 2011 Dynamic analysis of a small artery of a human finger by optical coherence tomography

Mitsuo Kuwabara, Natsuki Takahashi, Daisuke Takada, Masato Ohmi, Masamitsu Haruna

Proceedings Volume 7889, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XV; 78892Z (2011) https://doi.org/10.1117/12.873718
Event: SPIE BiOS, 2011, San Francisco, California, United States

Abstract

OCT is highly potential for development of a new field of dynamic skin physiology, as recently reported by the authors. In this paper, we demonstrate dynamic analysis of a small artery of a human finger by the SS-OCT. Among the vascular system, only the small artery has two physiological functions both for the elastic artery (like main and middle arteries) and for muscle-controlled one (like arterioles). It, therefore, is important for dynamic analysis of blood flow and circulation. In the time-sequential OCT images obtained with 25 frames/s, it is found that the small artery makes a sharp response to sound stress for contraction and expansion while it continues pulsation in synchronization with the heartbeats. This result indicates that the small artery exhibits clearly the two physiological functions for blood flow and circulation. In response to sound stress, blood flow is controlled effectively by thickness change of the tunica media which consists of five to six layers of smooth muscles. It is thus found that the thickness of the tunica media changes remarkably in response to external stress, reflecting activity of the sympathetic nerve. The dynamic OCT of the small artery presented here will allow us not only to understand the mechanism of blood flow control and also to detect abnormal physiological functions in the whole vascular system.

Citation Download Citation

Mitsuo Kuwabara, Natsuki Takahashi, Daisuke Takada, Masato Ohmi, and Masamitsu Haruna "Dynamic analysis of a small artery of a human finger by optical coherence tomography", Proc. SPIE 7889, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XV, 78892Z (11 February 2011); https://doi.org/10.1117/12.873718

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KEYWORDS

Arteries

Optical coherence tomography

Blood circulation

Nerve

Skin

Control systems

Physiology

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