US4462398A
Expired / Lapsed
US
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Respirating gas supply method and apparatus therefor
Assignee: DOC TECHNOLOGIES Inc A CORP OF CONNECTICUT
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Filing: 1982-12-03
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Granted: 1984-07-31
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Expires: 2002-12-03
Abstract
Abstract In various embodiments of a respirating gas supply method and apparatus a control circuit (32) responsive to a sensor (28) operates valve means (26) to supply pulses of respirating gas through a single hose cannula (48) to an in vivo respiratory system when negative pressure indicative of inspiration is sensed by the sensor (28). The control circuit (32) operates the valve (26) to communicate the in vivo respiratory system with a supply of gas (20) only if the negative pressure sensed by the sensor (28) does not occur within a predetermined yet selectively variable required minimum delay interval between successive pulsed applications of gas to the in vivo respiratory system. The pulse of gas applied to the in vivo respiratory system can be spiked pulses or square pulses. Humidifiers, nebulizers, and sources of a second gas are provided in accordance with various embodiments. Apnea event detection is also provided.
Inventors
- 👤 Gerald Durkan
- 👤 Leonard M. Sieracki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:43
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/3601; A61M; A61M16/00; A61M16/0051; A61M16/021; A61M16/06; A61M16/0666; A61M16/0672; A61M16/0677; A61M16/08; A61M16/0816; A61M16/0841; A61M16/0858; A61M16/0003; A61M2016/0015; A61M2016/0018; A61M2016/0021; A61M2016/0024; A61M2016/0027; A61M2016/003; A61M2016/0033; A61M2016/0039; A61M2205/00; A61M2205/05; A61M2205/054; A61M2230/00; A61M2230/60
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
231 words
An apparatus for sensing negative pressure in an in vivo respiratory system and for supplying gas to said in vivo respiratory system, said apparatus comprising: valve means having first, second and third ports, said first port being selectively communicable with either said second port or said third port; a single line connected to said first port of said valve means, said line adapted both to transmit to said valve means negative pressure indicative of an inspiration in said in vivo respiratory system and to transmit gas to said in vivo respiratory system; a source of gas communicating with said second port of said valve means; means for sensing negative pressure in said in vivo respiratory system, said sensing means communicating with said third port of said valve means; and, means for controlling said valve means, said control means being responsive to said sensing means for selectively connecting said first port of said valve means to said second port thereof when negative pressure is sensed and for maintaining said connection for at least a portion of the time duration of said negative pressure in said in vivo respiratory system so that gas may be supplied to said in vivo respiratory system, said control means also being adapted to reconnect said first port of said valve means to said third port thereof after the application of gas to said in vivo respirating system.
Claim 2
Independent Claim
231 words
An apparatus for sensing negative pressure in an in vivo respiratory system and for supplying gas to said in vivo respiratory system, said apparatus comprising: valve means having first, second and third ports, said first port being selectively communicable with either said second port or said third port; a single line connected to said first port of said valve means, said line adapted both to transmit to said valve means negative pressure indicative of an inspiration in said in vivo respiratory system and to transmit gas to said in vivo respiratory system; a source of gas communicating with said second port of said valve means; means for sensing negative pressure in said in vivo respiratory system, said sensing means communicating with said third port of said valve means; and, means for controlling said valve means, said control means being responsive to said sensing means for selectively connecting said first port of said valve means to said second port thereof when negative pressure is sensed and for maintaining said connection for at least a portion of the time duration of said negative pressure in said in vivo respiratory system so that gas may be supplied to said in vivo respiratory system, said control means also being adapted to reconnect said first port of said valve means to said third port thereof after the application of gas to said in vivo respirating system.
Claim 3
Dependent Claim
17 words
The apparatus of claim 1 wherein said valve means is a slideable three-way two position spool valve.
Claim 4
Independent Claim
34 words
The apparatus of claims 1 or 2 wherein said single line is connected to application means for applying gas to said in vivo respiratory system, and wherein said application means comprises a nasal cannula.
Claim 5
Dependent Claim
13 words
The apparatus of claim 1 wherein said sensing means comprises a fluidic amplifier.
Claim 6
Dependent Claim
15 words
The apparatus of claim 1 wherein said sensor means comprises a pressure to electric sensor.
Claim 7
Independent Claim
283 words
An apparatus for sensing negative pressure in an in vivo respiratory system and for supplying humidified gas to said in vivo respiratory system, said apparatus comprising: valve means having first, second, third and fourth ports wherein said valve means selectively communicates either said first port with said third port or said second port with said fourth port; a single line connected to said first port of said valve means, said line adapted to both transmit to said valve means negative pressure indicative of an inspiration in said in vivo respiratory system and to transmit humidified gas to said in vivo respiratory system; a source of gas communicating with said second port of said valve means; means for sensing negative pressure in said in vivo respiratory system, said sensing means communicating with said third port of said valve means; humidifying means, said humidifying means having an input port connected to said fourth port of said valve means and an output port connected to said line connecting said in vivo respiratory system to said first port of said valve means; and, means for controlling said valve means, said control means being responsive to said sensing means for selectively connecting said fourth port of said valve means to said second port thereof when negative pressure is sensed and for maintaining said connection for at least a portion of the time duration of said negative pressure in said in vivo respiratory system so that humidified gas may be supplied to said in vivo respiratory system, said control means also being adapted to reconnect said first port of said valve means to said third port thereof after the application of humidified gas to said in vivo respiratory system.
Claim 8
Independent Claim
283 words
An apparatus for sensing negative pressure in an in vivo respiratory system and for supplying humidified gas to said in vivo respiratory system, said apparatus comprising: valve means having first, second, third and fourth ports wherein said valve means selectively communicates either said first port with said third port or said second port with said fourth port; a single line connected to said first port of said valve means, said line adapted to both transmit to said valve means negative pressure indicative of an inspiration in said in vivo respiratory system and to transmit humidified gas to said in vivo respiratory system; a source of gas communicating with said second port of said valve means; means for sensing negative pressure in said in vivo respiratory system, said sensing means communicating with said third port of said valve means; humidifying means, said humidifying means having an input port connected to said fourth port of said valve means and an output port connected to said line connecting said in vivo respiratory system to said first port of said valve means; and, means for controlling said valve means, said control means being responsive to said sensing means for selectively connecting said fourth port of said valve means to said second port thereof when negative pressure is sensed and for maintaining said connection for at least a portion of the time duration of said negative pressure in said in vivo respiratory system so that humidified gas may be supplied to said in vivo respiratory system, said control means also being adapted to reconnect said first port of said valve means to said third port thereof after the application of humidified gas to said in vivo respiratory system.
Claim 9
Dependent Claim
13 words
The apparatus of claim 6 wherein said sensing means comprises a fluidic amplifier.
Claim 10
Dependent Claim
15 words
The apparatus of claim 6 wherein said sensor means comprises a pressure to electric sensor.
Claim 11
Dependent Claim
32 words
The apparatus of claim 6 wherein said single line is connected to application means for applying gas to said in vivo respiratory system, and wherein said application means comprises a nasal cannula.
Claim 12
Dependent Claim
13 words
The apparatus of claim 6 wherein said humidifying means is a bubble humidifier.
Claim 13
Dependent Claim
16 words
The apparatus of claim 6 wherein said valve means is a slidable two way spool valve.
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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) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |