US5413592A
Expired / Lapsed
US
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Cardiac pacemaker with automatic parameter adjustment
Assignee: Intermedics Inc
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Filing: 1993-03-26
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Granted: 1995-05-09
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Expires: 2013-03-26
Abstract
Abstract A cardiac pacemaker which automatically tests for changes in and adjusts output or other parameters in response to detected changes in environmental or physiologic conditions. One or more passive sensors detect environmental or physiologic conditions which may correlate to stimulation thresholds or other parameters. If a change in such conditions is detected, a test or search is initiated to achieve an energy efficient output, to optimize cardiac output, to improve sensing, etc.
Inventors
- 👤 Edward A. Schroeppel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:10
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/362; A61N1/365; A61N1/36585; A61N1/37; A61N1/371; A61N1/3712; A61N1/368; A61N1/3682
Claims Analysis
Total Claims: 52
Claim 1
Independent Claim
89 words
A cardiac pacemaker comprising a pulse generator for producing heart-stimulating pulses, means for electrically connecting said pulse generator to a human heart, at least one sensor for sensing a first variable parameter indicative of physiologic change, means responsive to changes in said first parameter indicative of physiologic change for initiating testing of a second variable parameter, and testing means responsive to said means for initiating testing, said testing means comprising means for stimulating the heart, means for detecting capture, and means for varying the magnitude of a stimulating pulse.
Claim 2
Dependent Claim
89 words
A cardiac pacemaker comprising a pulse generator for producing heart-stimulating pulses, means for electrically connecting said pulse generator to a human heart, at least one sensor for sensing a first variable parameter indicative of physiologic change, means responsive to changes in said first parameter indicative of physiologic change for initiating testing of a second variable parameter, and testing means responsive to said means for initiating testing, said testing means comprising means for stimulating the heart, means for detecting capture, and means for varying the magnitude of a stimulating pulse.
Claim 3
Dependent Claim
20 words
The cardiac pacemaker according to claim 1 wherein said at least one sensor comprises a sensor for detecting environmental changes.
Claim 4
Dependent Claim
17 words
The cardiac pacemaker according to claim 2 wherein said sensor for detecting environmental changes is an accelerometer.
Claim 5
Dependent Claim
18 words
The cardiac pacemaker according to claim 2 wherein said sensor for detecting environmental changes is a vibration sensor.
Claim 6
Dependent Claim
18 words
The cardiac pacemaker according to claim 1 wherein said at least one sensor comprises a physiologic condition sensor.
Claim 7
Dependent Claim
16 words
The cardiac pacemaker according to claim 5 wherein said physiologic condition sensor comprises a temperature sensor.
Claim 8
Dependent Claim
16 words
The cardiac pacemaker according to claim 5 wherein said physiologic condition sensor comprises a pH sensor.
Claim 9
Dependent Claim
16 words
The cardiac pacemaker according to claim 5 wherein said physiologic condition sensor comprises an oxygen sensor.
Claim 10
Dependent Claim
16 words
The cardiac pacemaker according to claim 5 wherein said physiologic condition sensor comprises an impedance sensor.
Claim 11
Dependent Claim
16 words
The cardiac pacemaker according to claim 5 wherein said physiologic condition sensor comprises a catecholamine sensor.
Claim 12
Dependent Claim
18 words
The cardiac pacemaker according to claim 1 wherein said at least one sensor comprises a plurality of sensors.
Claim 13
Dependent Claim
19 words
The cardiac pacemaker according to claim 11 wherein said plurality of sensors comprise an accelerometer and a temperature sensor.
Claim 14
Dependent Claim
90 words
A cardiac pacemaker comprising a pulse generator for producing heart-stimulating pulses, means for electrically connecting said pulse generator to a human heart, at least one sensor for sensing a first variable parameter indicative of physiologic change, means responsive to changes in said first parameter indicative of physiologic change for initiating testing of a second variable parameter, and testing means responsive to said means for initiating testing, said testing means comprising means for stimulating the heart, means for detecting a T-wave, and means for altering the duration of a refractory period.
Claim 15
Dependent Claim
90 words
A cardiac pacemaker comprising a pulse generator for producing heart-stimulating pulses, means for electrically connecting said pulse generator to a human heart, at least one sensor for sensing a first variable parameter indicative of physiologic change, means responsive to changes in said first parameter indicative of physiologic change for initiating testing of a second variable parameter, and testing means responsive to said means for initiating testing, said testing means comprising means for stimulating the heart, means for detecting a T-wave, and means for altering the duration of a refractory period.
Claim 16
Dependent Claim
20 words
The cardiac pacemaker according to claim 13 wherein said at least one sensor comprises a sensor for detecting environmental changes.
Claim 17
Dependent Claim
17 words
The cardiac pacemaker according to claim 14 wherein said sensor for detecting environmental changes is an accelerometer.
Claim 18
Dependent Claim
18 words
The cardiac pacemaker according to claim 14 wherein said sensor for detecting environmental changes is a vibration sensor.
Claim 19
Dependent Claim
18 words
The cardiac pacemaker according to claim 13 wherein said at least one sensor comprises a physiologic condition sensor.
Claim 20
Dependent Claim
16 words
The cardiac pacemaker according to claim 17 wherein said physiologic condition sensor comprises a temperature sensor.
Claim 21
Dependent Claim
16 words
The cardiac pacemaker according to claim 17 wherein said physiologic condition sensor comprises a pH sensor.
Claim 22
Dependent Claim
16 words
The cardiac pacemaker according to claim 17 wherein said physiologic condition sensor comprises an oxygen sensor.
Claim 23
Dependent Claim
16 words
The cardiac pacemaker according to claim 17 wherein said physiologic condition sensor comprises an impedance sensor.
Claim 24
Dependent Claim
16 words
The cardiac pacemaker according to claim 17 wherein said physiologic condition sensor comprises a catecholamine sensor.
Claim 25
Dependent Claim
18 words
The cardiac pacemaker according to claim 13 wherein said at least one sensor comprises a plurality of sensors.
Claim 26
Dependent Claim
19 words
The cardiac pacemaker according to claim 23 wherein said plurality of sensors comprise an accelerometer and a temperature sensor.
Claim 27
Dependent Claim
89 words
A cardiac pacemaker comprising a pulse generator for producing heart-stimulating pulses, means for electrically connecting said pulse generator to a human heart, at least one sensor for sensing a first variable parameter indicative of physiologic change, means responsive to changes in said first parameter indicative of physiologic change for initiating testing of a second variable parameter, and testing means responsive to said means for initiating testing, said testing means comprising means for measuring the stroke volume, and means for varying magnitude of an A-V delay of a stimulating pulse.
Claim 28
Dependent Claim
89 words
A cardiac pacemaker comprising a pulse generator for producing heart-stimulating pulses, means for electrically connecting said pulse generator to a human heart, at least one sensor for sensing a first variable parameter indicative of physiologic change, means responsive to changes in said first parameter indicative of physiologic change for initiating testing of a second variable parameter, and testing means responsive to said means for initiating testing, said testing means comprising means for measuring the stroke volume, and means for varying magnitude of an A-V delay of a stimulating pulse.
Claim 29
Dependent Claim
20 words
The cardiac pacemaker according to claim 25 wherein said at least one sensor comprises a sensor for detecting environmental changes.
Claim 30
Dependent Claim
17 words
The cardiac pacemaker according to claim 26 wherein said sensor for detecting environmental changes is an accelerometer.
Claim 31
Dependent Claim
18 words
The cardiac pacemaker according to claim 26 wherein said sensor for detecting environmental changes is a vibration sensor.
Claim 32
Dependent Claim
18 words
The cardiac pacemaker according to claim 25 wherein said at least one sensor comprises a physiologic condition sensor.
Claim 33
Dependent Claim
16 words
The cardiac pacemaker according to claim 29 wherein said physiologic condition sensor comprises a temperature sensor.
Claim 34
Dependent Claim
16 words
The cardiac pacemaker according to claim 29 wherein said physiologic condition sensor comprises a pH sensor.
Claim 35
Dependent Claim
16 words
The cardiac pacemaker according to claim 29 wherein said physiologic condition sensor comprises an oxygen sensor.
Claim 36
Dependent Claim
16 words
The cardiac pacemaker according to claim 29 wherein said physiologic condition sensor comprises an impedance sensor.
Claim 37
Dependent Claim
16 words
The cardiac pacemaker according to claim 29 wherein said physiologic condition sensor comprises a catecholamine sensor.
Claim 38
Dependent Claim
18 words
The cardiac pacemaker according to claim 25 wherein said at least one sensor comprises a plurality of sensors.
Claim 39
Dependent Claim
19 words
The cardiac pacemaker according to claim 35 wherein said plurality of sensors comprise an accelerometer and a temperature sensor.
Claim 40
Dependent Claim
82 words
A cardiac pacemaker comprising a pulse generator for producing heart-stimulating pulses, means for electrically connecting said pulse generator to a human heart, at least one sensor for sensing a first variable parameter indicative of physiologic change, means responsive to changes in said first parameter indicative of physiologic change for initiating testing of a second variable parameter, and testing means responsive to said means for initiating testing, said testing means comprising means for detecting intrinsic cardiac signals, and means for altering amplification gain.
Claim 41
Dependent Claim
82 words
A cardiac pacemaker comprising a pulse generator for producing heart-stimulating pulses, means for electrically connecting said pulse generator to a human heart, at least one sensor for sensing a first variable parameter indicative of physiologic change, means responsive to changes in said first parameter indicative of physiologic change for initiating testing of a second variable parameter, and testing means responsive to said means for initiating testing, said testing means comprising means for detecting intrinsic cardiac signals, and means for altering amplification gain.
Claim 42
Dependent Claim
20 words
The cardiac pacemaker according to claim 37 wherein said at least one sensor comprises a sensor for detecting environmental changes.
Claim 43
Dependent Claim
17 words
The cardiac pacemaker according to claim 38 wherein said sensor for detecting environmental changes is an accelerometer.
Claim 44
Dependent Claim
18 words
The cardiac pacemaker according to claim 38 wherein said sensor for detecting environmental changes is a vibration sensor.
Claim 45
Dependent Claim
18 words
The cardiac pacemaker according to claim 37 wherein said at least one sensor comprises a physiologic condition sensor.
Claim 46
Dependent Claim
16 words
The cardiac pacemaker according to claim 41 wherein said physiologic condition sensor comprises a temperature sensor.
Claim 47
Dependent Claim
16 words
The cardiac pacemaker according to claim 41 wherein said physiologic condition sensor comprises a pH sensor.
Claim 48
Dependent Claim
16 words
The cardiac pacemaker according to claim 41 wherein said physiologic condition sensor comprises an oxygen sensor.
Claim 49
Dependent Claim
16 words
The cardiac pacemaker according to claim 41 wherein said physiologic condition sensor comprises an impedance sensor.
Claim 50
Dependent Claim
16 words
The cardiac pacemaker according to claim 41 wherein said physiologic condition sensor comprises a catecholamine sensor.
Claim 51
Dependent Claim
18 words
The cardiac pacemaker according to claim 37 wherein said at least one sensor comprises a plurality of sensors.
Claim 52
Dependent Claim
19 words
The cardiac pacemaker according to claim 47 wherein said plurality of sensors comprise an accelerometer and a temperature sensor,
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-05-08 | 1998-11-07 | 1999-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-08 | 2002-11-07 | 2003-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-08 | 2006-11-07 | 2007-05-09 | $7700.00 | Window Closed / Lapsed |