Chronic implantation of a skeletal muscle energy convertor for cardiac assist devices: a preliminary report.

Chronic implantation of a skeletal muscle energy convertor for cardiac assist devices: a preliminary report.
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用于心脏辅助装置的骨骼肌能量转换器的长期植入:初步报告。

DOI:
10.1097/00002480-199809000-00091
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发表时间:
1998
期刊:
ASAIO journal (American Society for Artificial Internal Organs : 1992)
影响因子:
--
通讯作者:
Hill,JD
Hill,JD
中科院分区:
--
文献类型:
--
作者:
Reichenbach,SH;Gustafson,KJ;Khazalpour,KM;Farrar,DJ;Hill,JD

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一种能够驱动各种心脏辅助装置的高效能量转换器正在山羊身上开发。线性结构的肌肉功被转换成水力能量,并传递到外部测试系统,该系统在缩短收缩期间控制肌肉负荷。本研究的重点是在肌肉调节过程中肌肉特征和最佳功率输出的变化。能量转换器安装在胸腔上,背阔肌插入物重新连接到装置上,经皮液压管在脊柱附近引出。在装置、刺激器和肌内电极植入之后,开始了渐进式调理方案。每周在有意识的动物中进行生物力学肌肉表征,在等长和等张条件下进行单次抽搐和强直收缩。表征数据为计算机模拟预测最佳肌肉功率输出和操作条件提供了可用功率和输入的度量。这些正在进行的植入提供了对可用肌肉力量的深入了解,并表明植入式能量转换器是可行的。能量转换器的开发是实现无栓骨骼肌心脏辅助的重要一步。这些研究将在数量和持续时间上扩大,以进一步调查调理的影响,并确定设备开发的改进。
An efficient energy convertor capable of driving a variety of cardiac assist devices is being developed in goats. Muscle work in a linear configuration is converted to hydraulic energy and transmitted to an external test system that controls muscle loads during shortening contractions. This investigation focuses on the variation of muscle characteristics and optimal power output during muscle conditioning. The energy convertor was mounted on the rib cage, the latissimus dorsi insertion reattached to the device, and percutaneous hydraulic lines exited near the spine. Following device, stimulator, and intramuscular electrode implantation, a progressive conditioning protocol was initiated. Weekly biomechanical muscle characterization was performed in the conscious animal, with single twitch and tetanic contractions performed under isometric and isotonic conditions. The characterization data provide a measure of available power, as well as inputs, for a computer simulation that predicts optimal muscle power output and operating conditions. These ongoing implants provide insight into the available muscle power and suggest an implantable energy convertor is feasible. Development of an energy convertor is an important step toward tether free skeletal muscle powered cardiac assist. These studies will be expanded in number and duration to further investigate the effects of conditioning and identify improvements in device development.
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