Pressure Controlled Clamp Using Shape Memory Alloy for Minimal Vessel Invasion in Blood Flow Occlusion
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概要
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Purpose: Vessel damage after clamping may affect the success of surgical operations. A new pressure controlled clamp (SMA clamp) was designed using super elastic property of shape memory alloy (SMA) to realize atraumatic vessel occlusion. The ability and biological effect of the SMA clamp to control pressure was investigated in vivo. Methods: The loading-displacement curves of the SMA clamps (experimental group) and conventional clamp (control group) by occlusion of pig carotid arteries were evaluated using a clamping-pressure analyzing system. To investigate macroscopically and histologically the vessel damage of the SMA and conventional clamps, pig carotid arteries were stained with Evan's blue and its histological sections were stained with Elastica Massion after clamping for fifteen minutes.Results: Constant value was shown in the loading-displacement curve of SMA clamp. In the control group, damaged area stained with Evan's blue in the vessel wall showed enlargement with the pressure increasing. Less areas in experimental groups are observed than that in the control group. Histological section in the experimental group showed no obvious except a slight compressive damage in the tunica intima. In the control group, vessel wall showed irreversible damages. Conclusions: This experiment indicated that the SMA clamp, which has a unique mechanical property, can be used without vessels damage. This pressure controlled clamp can be a selection in clinical apparatus to improve surgical safety.
著者
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Zhang Ye
Department Of Bacteriology Kurume University School Of Medicine
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Sano Yuya
Division Of Advanced Prosthetic Dentistry Tohoku University Graduate School Of Dentistry Tohoku Univ
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Kano Mitsuhiro
Division Of Oral And Craniofacial Anatomy Tohoku University Graduate School Of Dentistry Tohoku Univ
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Kanetaka Hiroyasu
Department Of Physical Medicine And Rehabilitation Graduate School Of Biomedical Engineering
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Shimizu Yoshinaka
Division Of Oral And Craniofacial Anatomy Tohoku University Graduate School Of Dentistry Tohoku Univ
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Sato Takumi
Division of Oral Pathology, Graduate school of Dentistry, Tohoku University, Sendai, Miyagi, Japan.
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Zhang Ye
Department of Physical Medicine and Rehabilitation, Graduate School of Biomedical Engineering, Tohoku University, Sendai, Miyagi, Japan
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Kudo Tadaaki
Division of Oral Physiology, and Tohoku University, Sendai, Miyagi, Japan
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Sano Yuya
Division of Advanced Prosthetic Dentistry, Tohoku University, Sendai, Miyagi, Japan
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Kano Mitsuhiro
Division of Oral and Craniofacial Anatomy, Tohoku University, Sendai, Miyagi, Japan
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- Pressure Controlled Clamp Using Shape Memory Alloy for Minimal Vessel Invasion in Blood Flow Occlusion
- Pressure Controlled Clamp Using Shape Memory Alloy for Minimal Vessel Invasion in Blood Flow Occlusion