Patent US1625449A successfully refreshed from Google Patents.
US4411271A
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US
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Body tissue depolarization evaluation system
Assignee: Medtronic Inc
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Filing: 1982-02-10
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Granted: 1983-10-25
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Expires: 2002-02-10
Abstract
Abstract An evaluation system for use in conjunction with a body implantable body stimulator, the body stimulator including a stimulation delivering and depolarization sensing lead system. An input connects a digitizer to the lead system, the digitizer digitizing depolarization signals sensed by the lead system. A computing system identifies excursions in the digitized depolarization signals and evaluates identified excursions in accordance with preselected merit criteria. An output gives an indication of at least that excursion having the highest merit that satisfies said merit criteria.
Inventors
- 👤 H. Toby Markowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:02
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/362; A61N1/365; A61N1/37; A61N1/371
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
96 words
An evaluation system for use in conjunction with a body implantable body stimulator, the body stimulator including a stimulaton delivering and depolarization sensing lead system, said evaluation system comprising: input means adapted for connection to said lead system; means for digitizing depolarization signals sensed by said lead system; computing means including means for identifying excursions in the digitized depolarization signals and means for evaluating identified excursions in accordance with a preselected plurality of merit criteria; and output means for giving an indication of at least that excursion having the highest merit that satisfies said merit criteria.
Claim 2
Dependent Claim
96 words
An evaluation system for use in conjunction with a body implantable body stimulator, the body stimulator including a stimulaton delivering and depolarization sensing lead system, said evaluation system comprising: input means adapted for connection to said lead system; means for digitizing depolarization signals sensed by said lead system; computing means including means for identifying excursions in the digitized depolarization signals and means for evaluating identified excursions in accordance with a preselected plurality of merit criteria; and output means for giving an indication of at least that excursion having the highest merit that satisfies said merit criteria.
Claim 3
Dependent Claim
38 words
The system of claim 1 wherein said output means gives an indication of the first evaluated excursion satisfying said merit criteria and excursions evaluated subsequent to said first indicated excursion having greater merit than the last indicated excursion.
Claim 4
Dependent Claim
18 words
The system of claim 2 wherein said output means comprises means for displaying peak-to-peak amplitude of indicated excursions.
Claim 5
Dependent Claim
13 words
The system of claim 3 wherein said displaying means comprises digital displaying means.
Claim 6
Dependent Claim
17 words
The system of claim 1 wherein said merit criteria include excursion slew rate and excursion peak-to-peak amplitude.
Claim 7
Dependent Claim
13 words
The system of claim 5 wherein said merit criteria further include excursion duration.
Claim 8
Dependent Claim
38 words
The system of claim 6 wherein said output means gives an indication of the first evaluated excursion satisfying said merit criteria and excursions evaluated subsequent to said first indicated excursion having greater merit than the last indicated excursion.
Claim 9
Dependent Claim
44 words
The system of claim 6 wherein said merit criteria further include, for excursions subsequent to a first indicated excursion, occurrence within a preselected interval after said first indicated excursion and the relative peak-to-peak amplitude relative to the last indicated excursion within said preselected interval.
Claim 10
Dependent Claim
18 words
The system of claim 8 wherein said output means comprises means for displaying peak-to-peak amplitude of indicated excursions.
Claim 11
Dependent Claim
13 words
The system of claim 9 wherein said displaying means comprises digital displaying means.
Claim 12
Dependent Claim
16 words
The system of claim 10 wherein said excursion identifying means identifies excursions having a negative slope.
Claim 13
Dependent Claim
40 words
The system of claim 11 wherein said merit criteria comprise an excursion slew rate greater than 0.1 V/sec., an excursion peak-to-peak amplitude greater than 1.0 mV, and an excursion duration greater than 3 msec. but no greater than 30 msec.
Claim 14
Dependent Claim
12 words
The system of claim 12 wherein said preselected interval is 200 msec.
Claim 15
Dependent Claim
54 words
The system of claim 13 wherein said output means gives an indication of the first evaluted excursion satisfying said merit criteria and excursions evaluated subsequent to said first indicated excursion during said preselected interval that satisfy said merit criteria and have a peak-to-peak amplitude greater than the last indicated excursion during said preselected interval.
Claim 16
Dependent Claim
16 words
The system of claim 1 wherein said excursion identifying means identifies excursions having a negative slope.
References Cited (Backward Citations)
US3209251A
Cited
US3554187A
Cited
US3498287A
Cited
US3518983A
Cited
US3606882A
Cited
US4112930A
Cited
WO1981001659A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |