US4402327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
External cardiac compression alarm system
Assignee: Individual
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Filing: 1981-06-12
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Granted: 1983-09-06
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Expires: 2001-06-12
Abstract
Abstract An external cardiac compression alarm system is disclosed comprising an inflatable balloon which may be inserted through the esophagus into the chest region of a patient undergoing cardiac arrest, said balloon being connected by a tube to a pressure gauge. The pressure gauge, in turn, is connected to a speaker which may emit two tones. There are two switches provided on the pressure gauge, one switch corresponding to a desired minimum degree of pressure to be exerted on the patient and the second switch corresponding to a desired maximum degree of pressure such that when the first switch is activated by the pressure gauge, the speaker emits one tone and when the second switch is activated, the speaker emits a second tone, thereby providing both audio and visual feedback immediately to a person performing external cardiac compression.
Inventors
- 👤 E. H. Lambert
- 👤 T. A. Don Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:00
CPC Classifications
G; G09; G09B; G09B23/00; G09B23/28; G09B23/288; A; A61; A61B; A61B5/00; A61B5/03; A61B5/036; A61B5/037; A61B5/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
123 words
A cardiac compression alarm system for insertion through the mouth and esophagus to a position adjacent the chest region, comprising: Sensor means configured to be inserted through the mouth and esophagus into the chest region of a person for sensing changes in external pressure applied to said chest region; a conduit joined to said sensor means, said conduit of sufficient length so as to extend from the sensor means through the esophagus and mouth to a position external to the person; measuring means, joined to said conduit, for measuring a change in the force exerted on said sensor means in said chest region; and indicating means, joined to said measuring means, for indicating the change in the force measured by said measuring means.
Claim 2
Dependent Claim
123 words
A cardiac compression alarm system for insertion through the mouth and esophagus to a position adjacent the chest region, comprising: Sensor means configured to be inserted through the mouth and esophagus into the chest region of a person for sensing changes in external pressure applied to said chest region; a conduit joined to said sensor means, said conduit of sufficient length so as to extend from the sensor means through the esophagus and mouth to a position external to the person; measuring means, joined to said conduit, for measuring a change in the force exerted on said sensor means in said chest region; and indicating means, joined to said measuring means, for indicating the change in the force measured by said measuring means.
Claim 3
Dependent Claim
14 words
A system according to claim 1 wherein said measuring means comprises a pressure gauge.
Claim 4
Dependent Claim
14 words
A system according to claim 1 wherein said sensor means comprises an inflatable balloon.
Claim 5
Dependent Claim
74 words
A system according to claim 1 wherein said indicating means comprises a dial connected to said measuring means and a speaker capable of emitting first and second tones, said speaker being electrically connected to said measuring means so that when said measuring means registers a first amount of pressure, said speaker will emit said first tone, and when said measuring means registers a second amount of pressure, said speaker will emit said second tone.
Claim 6
Dependent Claim
27 words
A system accoring to claim 4, further comprising a first switching means for activating said first tone and a second switching means for activating said second tone.
Claim 7
Dependent Claim
32 words
A system according to claim 5, wherein said dial further includes a needle and said first and second switching means are activated by the passage therethrough of said needle on said dial.
Claim 8
Independent Claim
197 words
A method for determining changes in external pressure applied to the cardiac region, such as during cardiopulmonary resuscitation, comprising the steps of: (a) providing a compression alarm system, said compression alarm system comprising: (i) sensor means configured to be inserted through the mouth and esophagus into the chest region of a person for sensing changes in external pressure applied to said chest region; (ii) a conduit joined to said sensor means, said conduit of sufficient length so as to extend from the sensor means through the esophagus and mouth to a position external to the person; (iii) measuring means, joined to said conduit, for measuring a change in the force exerted on said sensor means in said chest region; and (iv) indicating means, joined to said measuring means, for indicating the change in the force measured by said measuring means; (b) inserting said sensor means and said conduit through the mouth and esophagus such that the sensor means is place in said chest region; (c) applying an external pressure to said cardiac region, whereby said measuring means measures the changes in the force exerted on said chest region and the changes are indicated on said indicating means.
Claim 9
Independent Claim
197 words
A method for determining changes in external pressure applied to the cardiac region, such as during cardiopulmonary resuscitation, comprising the steps of: (a) providing a compression alarm system, said compression alarm system comprising: (i) sensor means configured to be inserted through the mouth and esophagus into the chest region of a person for sensing changes in external pressure applied to said chest region; (ii) a conduit joined to said sensor means, said conduit of sufficient length so as to extend from the sensor means through the esophagus and mouth to a position external to the person; (iii) measuring means, joined to said conduit, for measuring a change in the force exerted on said sensor means in said chest region; and (iv) indicating means, joined to said measuring means, for indicating the change in the force measured by said measuring means; (b) inserting said sensor means and said conduit through the mouth and esophagus such that the sensor means is place in said chest region; (c) applying an external pressure to said cardiac region, whereby said measuring means measures the changes in the force exerted on said chest region and the changes are indicated on said indicating means.
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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) | 1986-09-05 | 1987-03-07 | 1987-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-05 | 1991-03-07 | 1991-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-05 | 1995-03-07 | 1995-09-06 | $7700.00 | Window Closed / Lapsed |