US3881493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronously reinforcing pacer
Assignee: American Optical Corp
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Filing: 1974-02-07
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Granted: 1975-05-06
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Expires: 1994-02-07
Abstract
Abstract There is disclosed an external pacer for operating together with an improperly functioning implantable pacer. The external pacer operates in the demand mode; as in the case of an implantable demand pacer, when a heartbeat is detected the generation of a stimulating pulse is inhibited. However, the external pacer also includes a mechanism for sensing a stimulating pulse generated by the implantable pacer. When such a pacer pulse is detected, the external pacer immediately generates a pulse which reinforces the pulse generated by the implantable pacer.
Inventors
- 👤 Robert L Cannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:15
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/362; A61N1/3625
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
148 words
An external heart pacer for supplementing the operation of the implantable heart pacer of a patient comprising electrode means for coupling to the heart of said patient, means for generating stimulating pulses on said electrode means, first means for detecting a patient heartbeat signal on said electrode means, means normally for controlling the periodic operation of said pulse generating means, means responsive to the detection of a heartbeat signal by said first detecting means for inhibiting the generation of a pulse by said pulse generating means and for restarting a period of its operation, second means for detecting an electrical signal on said electrode means indicative of the generation of a stimulating pulse by said implantable pacer, and means responsive to the operation of said second detecting means for controlling the generation of a pulse by said pulse generating means and for re-starting a period of its operation.
Claim 2
Dependent Claim
148 words
An external heart pacer for supplementing the operation of the implantable heart pacer of a patient comprising electrode means for coupling to the heart of said patient, means for generating stimulating pulses on said electrode means, first means for detecting a patient heartbeat signal on said electrode means, means normally for controlling the periodic operation of said pulse generating means, means responsive to the detection of a heartbeat signal by said first detecting means for inhibiting the generation of a pulse by said pulse generating means and for restarting a period of its operation, second means for detecting an electrical signal on said electrode means indicative of the generation of a stimulating pulse by said implantable pacer, and means responsive to the operation of said second detecting means for controlling the generation of a pulse by said pulse generating means and for re-starting a period of its operation.
Claim 3
Dependent Claim
58 words
An external heart pacer in accordance with claim 1 further including means for varying the period of said pulse generating means, whereby the rate at which stimulating pulses are generated may be made slower than the rate at which stimulating pulses are generated by said implantable pacer so that the external pacer can operate in a demand mode.
Claim 4
Dependent Claim
58 words
An external heart pacer in accordance with claim 2 further including means for preventing the operation of said second detecting means from controlling the generation of a pulse by said pulse generating means if said second detecting means operates within a predetermined time interval following the termination of the previous period of operation of said pulse generating means.
Claim 5
Dependent Claim
22 words
An external heart pacer in accordance with claim 2 further including means for selectively disabling the operation of said first detecting means.
Claim 6
Dependent Claim
58 words
An external heart pacer in accordance with claim 4 further including means for preventing the operation of said second detecting means from controlling the generation of a pulse by said pulse generating means if said second detecting means operates within a predetermined time interval following the termination of the previous period of operation of said pulse generating means.
Claim 7
Dependent Claim
125 words
An external heart pacer for supplementing the operation of the implantable heart pacer of a patient comprising means for generating pulses, electrode means for coupling to a patient''s heart, timing means for controlling the cyclic application of generated pulses to said electrode means, means for detecting electrical signals on said electrode means, and means responsive to the detected electrical signal on said electrode means representing a heartbeat for inhibiting the generation of a pulse and for starting a new cycle of operation of said timing means and responsive to the detected electrical signal on said electrode means representing a stimulating pulse from said implantable pacer for immediately controlling the generation of a pulse and for starting a new cycle of operation of said timing means.
Claim 8
Dependent Claim
125 words
An external heart pacer for supplementing the operation of the implantable heart pacer of a patient comprising means for generating pulses, electrode means for coupling to a patient''s heart, timing means for controlling the cyclic application of generated pulses to said electrode means, means for detecting electrical signals on said electrode means, and means responsive to the detected electrical signal on said electrode means representing a heartbeat for inhibiting the generation of a pulse and for starting a new cycle of operation of said timing means and responsive to the detected electrical signal on said electrode means representing a stimulating pulse from said implantable pacer for immediately controlling the generation of a pulse and for starting a new cycle of operation of said timing means.
Claim 9
Dependent Claim
57 words
An external heart pacer in accordance with claim 6 fuRther including means for varying the period of operation of said timing means, whereby the rate at which pulses are generated may be made slower than the rate at which stimulating pulses occur from said implantable pacer so that the external pacer can operate in a demand mode.
Claim 10
Dependent Claim
34 words
An external heart pacer in accordance with claim 7 further including means for inhibiting the generation of a pulse within a predetermined time interval following the generation of a previous pulse or a heartbeat.
Claim 11
Dependent Claim
34 words
An external heart pacer in accordance with claim 6 further including means for inhibiting the generation of a pulse within a predetermined time interval following the generation of a previous pulse or a heartbeat.
Claim 12
Dependent Claim
34 words
An external heart pacer in accordance with claim 6 further including means for selectively controlling the continuous generation of pulses under control of said timing means independent of the operation of said detecting means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |