Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1998-02-06
1999-07-20
Getzow, Scott M.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
A61N 1362
Patent
active
059250682
ABSTRACT:
Improved methods of determining the recommended replacement time (RRT), and therefore extending the longevity, of implantable electronic medical devices, especially implantable cardioverter-defibrillators, pacemakers and similar devices which rely on a battery having at least a minimal charge in order for the device to perform its intended function and devices employing these methods are described. In one embodiment the improved method entails independent measurement of at least two different indicators of battery strength, at least one of which is affected by the battery's internal impedance. In a preferred embodiment, terminal battery voltage and capacitor charge time are independently monitored. If the terminal battery voltage falls below a predetermined minimum threshold or the capacitor charge time is confirmed to exceed a predetermined maximum charge time, an RRT signal is issued. In an alternative embodiment, an RRT signal is also issued by the medical device when one indicator of battery strength, for example, battery terminal voltage, falls below a predetermined intermediate voltage but is above the minimum threshold voltage and a second indicator of battery strength, for example, capacitor charge time, exceeds its predetermined maximum threshold.
REFERENCES:
patent: 4295474 (1981-10-01), Fischell
patent: 4345603 (1982-08-01), Schulman
patent: 4606350 (1986-08-01), Frost
patent: 4809697 (1989-03-01), Causey et al.
patent: 4944299 (1990-07-01), Sergiu
patent: 5137021 (1992-08-01), Wayne et al.
patent: 5312444 (1994-05-01), Bocek et al.
patent: 5370668 (1994-12-01), Shelton et al.
patent: 5458624 (1995-10-01), Renirie et al.
Getzow Scott M.
Pacesetter Inc.
LandOfFree
Method for determining an ICD replacment time does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for determining an ICD replacment time, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for determining an ICD replacment time will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1317550