A New Device for the Measurement of the Arterial Compliance Using Implantable Sensors
作者:
A. Welz,
G. Murrmann,
C. Hammer,
U. Stegner,
期刊:
European Surgical Research
(Karger Available online 1993)
卷期:
Volume 25,
issue 4
页码: 245-253
ISSN:0014-312X
年代: 1993
DOI:10.1159/000129284
出版商: S. Karger AG
关键词: Arterial compliance;Low-flow arterial grafting;Graft healing
数据来源: Karger
摘要:
To determine the compliance of experimental arterial grafts and its chronic adaptation after implantation, a new device for measurements was developed which is combined with implantable sensors. The system is based on the physical induction phenomenon. Each sensor comprises two small coils of copper wire which are sutured opposite to each other to the arterial vessel. Up to 3 sensors are adapted to one electrical connector which can be covered subcutaneously. The device is able to read pulsatile diameter excursions of arterial vessels down to 0.02 mm. It was applied first to evaluate the elastic properties of a 4-mm dialdehyde-starch-preserved bovine internal mammary artery implanted in the canine femoral artery position. For comparison an ePTFE graft was used. At implantation the compliance of the biograft was calculated to be 0.028 ± 0.009% mm Hg–1, which was half of the compliance of the native femoral artery (0.06 ± 0.0025% mm Hg–1), but superior if compared to the PTFE (0.008 ± 0.005% mm Hg–1). Within 6 months the compliance of the femoral artery decreased to 0.039 ± 0.013% mm Hg–1, which was well matched now to the compliance of the biograft (0.027 ± 0.005% mm Hg
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