Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Instruments and devices for fault testing
Patent
1994-08-15
1996-09-03
Wieder, Kenneth A.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Instruments and devices for fault testing
324527, 324556, G01R 3112
Patent
active
055527132
ABSTRACT:
A continuity/leakage tester for cardiac catheter probes of the type having plural spaced surface electrodes thereon. The apparatus includes a block having an open ended blind bores provided therein sized for receiving catheters of different diameters. A port is provided in the bore or bores adjacent the opened end and a spring loaded electrical contact provided therein which is grounded. Four plural bores are provided in the block, a common electrical conductor bar extends transversely across the ports which are formed at a common longitudinal station on each of the bores. The catheter is inserted in the bore and as each surface electrode contacts the spring biased electrode in the bore, a continuity test may be performed by an ohm meter connected to the probe lead for that particular surface electrode. As each subsequent surface electrode on the probe enters the bore, its corresponding electrical lead may be switched to the ohm meter for continuity testing of that electrode. Leakage test may be performed between each pair of spaced surface electrodes on the probe by applying a leak test voltage across any two conductors via the catheter leads. If any electrical leakage is present between the selected conductors, a leak current is detected by a leakage detector. The block may be mounted conveniently on a cabinet containing the electrical circuitry for the continuity and leakage testing; and, selector knobs may be provided on the cabinet for the various test functions. The apparatus and method of the present invention enable the medical practitioner to quickly and easily test a cardiac catheter probe in the operating room prior to insertion of the probe in the incision made for entering the probe in the patients vein and inserting the probe into the patients heart.
REFERENCES:
patent: 4857857 (1989-08-01), Valenti et al.
patent: 5396181 (1995-03-01), O'Brien et al.
Cardiac Assist Devices, Inc.
Do Diep
Johnston Roger A.
Wieder Kenneth A.
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