Thermal Analysis and Control of Transcutaneous Energy Transfer Modulus of Puborectalis-Like Artificial Anal Sphincter

doi:10.16183/j.cnki.jsjtu.2019.188

Abstract

Abstract:

The puborectalis-like artificial anal sphincter system (PAAS) uses transuctaneous energy transmission (TET) to charge lithium batteries integrated within the charging module. Therefore, the system can work stably during in-vivo experiments for a long period of time. Massive in-vivo experiments show that the large amount of heat generated in the wireless charging process is unfavorable to the biological safety of the living tissue near the charging module after PAAS implantation, so it is necessary to reasonably plan the wireless charging process. In this paper, by analyzing the heat conduction relationship of the internal components of the charging module, the internal thermal resistance model of the charging module is established, verified, and modified by in-vitro experiments. The modified model can reliably describe the temperature changes of the living tissue during charging. Based on the modified model, this paper formulates the single maximum continuous wireless charging time during the in-vivo experiment, thus improving the biological safety of PAAS during in-vivo experiments, and then prolonging the implantation time of PAAS.

Key words: artificial anal sphincter, transcutaneous energy transfer, thermal resistance analysis, in-vivo experiment

CLC Number:

TH772

ZHOU Zerun, YAN Guozheng, WANG Zhiwu, HUA Fangfang, YAO Shengjian, DING Zifan. Thermal Analysis and Control of Transcutaneous Energy Transfer Modulus of Puborectalis-Like Artificial Anal Sphincter[J]. Journal of Shanghai Jiaotong University, 2020, 54(8): 813-819.

Figures/Tables 12

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材料名称	k/(W·m^-1·k^-1)	δ/mm
线圈Litz线(R1)	83.00	3.76
电子灌封胶(R2、R6)	0.10	0.01
医用尼龙外壳(R3、R7)	0.25	0.70
猪皮(R4)	0.54	5.46
电路板(R5)	16.50	0.80
脂肪(R8)	0.20	16.42
肌肉层(R9)	0.42	13.22