Electronic Skin Replaces Volunteer Experiments
Author(s)
N. Nessler, W. Reischer & M. Salchner
Abstract
Neutral electrodes (grounding plates used in electrosurgical operations) were
tested with thermo cameras in volunteer experiments. These experiments are
difficult to perform and expensive. A new test device swaroTEST with a
measuring board \“electronic skin” simulates the relevant electrical features of
human skin to replace volunteer experiments. This device consists of a three
dimensional resistor network representing the electric features of the skin and
muscle tissue, and a temperature sensing array (one transistor for each cm²) to
measure the resultant temperature increase after a standardized current load (700
mA hf current during 60 s, proposed in the relevant AAMI HF-18 standard). The
comparison of test results with thermo camera images of volunteer experiments
showed a sufficient coincidence, which proves the applicability of this test
device to replace volunteer experiments.
Keywords: electronic skin, electrosurgery, neutral electrode.
1 Introduction
Neutral electrodes (dispersive electrodes, grounding plates) are safety relevant
accessories in electrosurgery and must be tested according to AAMI HF 18
standard. A neutral electrode in contradiction to the active electrode (electrical
knife) must not heat the patient’s skin in excess of 6°C during the hf-current
pass.
One test method is a volunteer experiment under standardized conditions
(AAMI) with a thermo camera to measure the temperature increase on the skin
under the neutral electrode. This method is laborious (10 volunteers for one
significant test!), time consuming and expensive (thermo camera, clinical
environment) and cannot be used routinely for quality tests. The result of a
typical volunteer experiment is shown in fig. 1. As usual the higher temperatures
are displayed in yellow to red, cooler sites are green to blue.
Keywords
electronic skin, electrosurgery, neutral electrode.
Related Book
Other papers in this volume
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