Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1995-12-06
1997-07-22
Jastrzab, Jeffrey R.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
607 2, A61N 1362
Patent
active
056499710
ABSTRACT:
A method and apparatus for inducing fibrillation in a patient's heart by delivering a direct current stimulus to the heart from a DC-to-DC converter. The hardware of a conventional implantable cardioverter/defibrillator (ICD) is utilized with a modification to the control algorithms. Particularly, when it is desired to induce fibrillation in a patient's heart, typically during ICD implant defibrillation threshold (DFT) testing, a command is delivered from an external instrument to the ICD to deliver the fibrillation shock. The DC-to-DC converter which is normally used to charge the ICD high voltage capacitors is activated and immediately thereafter or following a short period to allow the high voltage capacitors to charge, the high voltage output switches of the output stage are closed. This delivers the output current from the DC-to-DC converter to the defibrillation electrodes and through the patient's heart. This stimulus is continued for a predetermined time of between about 30 milliseconds to 5 seconds. At that point the output switches are opened and the converter is shut off. This DC stimulus delivered directly to the patient's heart induces fibrillation.
REFERENCES:
patent: 3602229 (1971-08-01), Jaros
patent: 5129392 (1992-07-01), Bardy et al.
patent: 5215083 (1993-06-01), Drane et al.
patent: 5279293 (1994-01-01), Andersen et al.
patent: 5395373 (1995-03-01), Ayers
patent: 5470341 (1995-11-01), Kuehn et al.
patent: 5489293 (1996-02-01), Pless et al.
"Digital System for Artificial Fibrillation of Animal Hearts", Schwingshacki, et al., Biomedical Engineering, vol. 8, No. 11, Nov. 1973, pp. 472-474.
"Cadence.RTM. Tiered therapy Defibrillator System--V-100 Serial Pulse Generator and Programmer", Physician's Manual, Ventritex, Inc., Jan. 1993.
Fain Eric S.
Pless Benjamin D.
Jastrzab Jeffrey R.
Meltzer Mark J.
Mitchell Steven M.
Ventritex, Inc.
LandOfFree
Apparatus and method for inducing fibrillation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for inducing fibrillation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for inducing fibrillation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1557430