23 Jul METHOD AND DEVICE FOR PROVING INTESTINE TISSUE VIABILITY
Abstract
FIELD: medicine; medical engineering. ^ SUBSTANCE: device has two electrodes connected to AC-oscillator and oscilloscope mounted between the electrodes for measuring voltage amplitude. The electrodes are manufactured as pincers branches electrically insulated from each other at their fixation place. The oscillator produces alternating sinusoid voltage having amplitude of 3 V and frequency of 20 kHz. One of the electrodes is connected to the oscillator via active resister of 1.8 kOhm. Method involves recording impedance of tissues under study. Measurement results are processed using the device for proving intestine tissue viability. First, interelectrode voltage amplitude is measured with no tissue available between them. Then, a part of intestine is across captured with electrodes and compressed to bring internal surfaces in contact. Impedance changes are recorded of intestine under study by reading measured voltage amplitude values between the electrodes. The intestine is considered to be viable when interelectrode voltage amplitude becomes at least 1.75 times as small when tissue is available between the electrodes with respect to the case when no tissue is available between the electrodes. ^ EFFECT: wide range of functional applications. ^ 3 cl, 3 dwg
Year: 2006
Country: RU
Doc No: 2267986