Surgical electrotechnology: quo vadis?
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Electrocoagulation↗
Biomedical subjects
G C Gerhard
Publications and source records attributed to G C Gerhard.
A shocking experience: Ohm's Law and the nurse.
The Clinical Engineering Center of the Northern New England/University of New Hampshire has developed a seminar on electrical safety for members of the nursing profession. This program provides an understanding of basic circuit theory, grounding problems, wiring systems, and electrical safety. Examples are drawn from actual clinical situations. Portions of the seminar are devoted to equipment demonstrations and to a panel discussion which provides the participants with an opportunity to ask questions. Through this experience, the nurses begin to view the function of a Clinical Engineer in a different light, their awareness of the role of the Clinical Engineering Center is expanded, and they become a second line of defense for electrical safety in the hospital.
Biomedical Engineering↗
A programmable variable waveshape generator for electrosurgical research.
A variable waveform electrosurgical unit (VWESU) was designed and used for electrosurgical research. The design criteria included the ability to modulate the amplitude of a sinusoidal carrier on a cycle-by-cycle basis, output power equivalent to commercial generators, and provision for varying the output impedance. These were realized with a microprocessor-controlled variable waveform generator which allows the user to program waveforms into memory with a set of simple descriptive commands, a linear power amplifier, and a custom output transformer. The contents of the memory are directly pipelined to a set of analog switches, which modulate the radio-frequency carrier with one of eight amplitude levels, thereby bypassing the speed limitations of the microprocessor.
Biomedical Engineering↗