Apparatus and method for recording monophasic action potentials

Details Apparatus and method for recording monophasic action potentials Apparatus and method for recording monophasic action potentials

1988-07-27

1990-12-25

Cohen, Lee S.

Surgery

Truss

Pad

128786, 128696, A61B 50402, A61N 105

Patent

active

049795104

ABSTRACT:
The apparatus comprises a probe having a tip portion, a first electrode mounted on a terminal free end of the tip portion and a second electrode spaced along the tip portion from the first electrode for supplying a reference potential. The probe is constructed so as to hold the first electrode in contact with tissue of an in vivo beating heart with a positive pressure without causing macroscopic damage to the heart tissue while orienting the probe such that the second electrode is spaced from the heart tissue.
A stylet is retractably mounted within the probe, for allowing a physician to maneuver the probe through a vein or the like. Once the probe is in position, it may be replaced by a probe of a different shape. The probe may also be retracted while being inserted, for preventing internal injury to the patient. The stylet may have a noncircular cross-section for restricting directions in which it can bend. In an alternative embodiment, a combination catheter is disclosed, including pacing electrodes for pacing the heart while measuring the potentials thereof.

REFERENCES:
patent: 3665064 (1972-05-01), Mosier et al.
patent: 4135518 (1979-01-01), Dutcher
patent: 4172451 (1979-10-01), Kline
patent: 4682603 (1987-07-01), Franz
patent: 4690155 (1987-09-01), Hess
Franz et al., "Simultaneous Recordings of Monophasic Action Potentials . . . ", Klin Wochenschr, 58, 1357-1359, (1980).
Franz et al., "A Simple and Safe Method . . . ", Pflugeas Arch, 1980, P. R2.
Olsson et al., "Further Improved Method . . . ", J Electrocardiology, 4(1), 19-23, 1971.
Introduction to Bioelectrodes, Ferris, Plenum Press, 1974, 94-95.

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