Surgery – Truss – Pad
Patent
1986-11-10
1988-07-05
Cohen, Lee S.
Surgery
Truss
Pad
128908, A61B 1739
Patent
active
047547570
ABSTRACT:
The HF-current generator of an electrosurgical apparatus has one terminal connected to an active electrode and an additional terminal connected to a neutral electrode. The neutral electrode consists of at least two partial electrodes which are individually connected via connecting leads to respective current meters for measuing the partial currents in the respective connecting leads. The output side of the current meters are connected to a logic element that is provided for combining the partial currents and which provides a logic signal that is a function of their combination. A ratio generator is preferably provided as the logic element to develop a logic signal that is a function of the ratio of the partial currents. A comparator for comparing the logic signal with pre-set limit value is associated with the logic element. The output signal of the comparator is used as an alarm signal to actuate an alarm or a protective means for a patient in contact with the neutral electrode.
REFERENCES:
patent: 3683923 (1972-08-01), Anderson
patent: 3897787 (1975-08-01), Ikuno et al.
patent: 4200105 (1980-04-01), Gonsend
patent: 4231372 (1980-11-01), Newton
patent: 4384582 (1983-05-01), Watt
Siemens Publication "Kleine Einfuehrung in die Electrochirurgie", pp. 3-31.
tkb Pamphlet "Sichertheitstechnische Anforderungen", pp. 106-108.
Cohen Lee S.
Edelman Lawrence C.
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