US4776333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator with variable flow pattern
Assignee: Sharp Corp
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Filing: 1987-11-09
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Granted: 1988-10-11
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Expires: 2007-11-09
Abstract
Abstract An improved artificial ventilator is capable of selection or setting of any arbitrary pattern or waveform of the flow rate of inspiration gas. The flow rate of inspiration gas is controlled through an inspiration valve according to an input representative of a flow rate pattern of an inspiration gas with the aid of a micro-computer, whereby a desired flow pattern of inspiration gas is optionally set.
Inventors
- 👤 Ruichi Miyamae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:26
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/021; A61M16/022; A61M16/024; A61M16/20; A61M16/201; A61M16/202; A61M16/203; A61M16/204; A61M16/208; A61M16/209; A61M16/10; A61M16/105; A61M16/106; A61M16/107; A61M16/0003; A61M2016/0015; A61M2016/0018; A61M2016/0021; A61M2016/003; A61M2016/0033; A61M2016/0039
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
191 words
A control system for an artificial ventilator having a variable gas flow rate during a patient's inspiration comprising: input means for introducing flow rate information; and means, responsive to said flow rate information developed by said input means, for controlling the rate of said gas flow to match the flow rates introduced by said flow rate information; said input means introducing said flow rate information as a plurality of volumes distributed over the time of a single inspiration to allow introduction of time related flow rate information, said input means includes a plurality of sliding flow rate selection means, disposed so as to slide in parallel patterns, for introducing said flow rate information, each said flow rate selection means introducing a volume for a particular time period of a said inspiration, each said flow selection means having an indicator, the position of which indicates the relative flow rate for its associated time period of said inspiration, the indicators of said flow rate selection means collectively forming points above a reference line defining a curve which represents the flow rate with respect to time of said flow rate information for said inspiration.
Claim 2
Dependent Claim
191 words
A control system for an artificial ventilator having a variable gas flow rate during a patient's inspiration comprising: input means for introducing flow rate information; and means, responsive to said flow rate information developed by said input means, for controlling the rate of said gas flow to match the flow rates introduced by said flow rate information; said input means introducing said flow rate information as a plurality of volumes distributed over the time of a single inspiration to allow introduction of time related flow rate information, said input means includes a plurality of sliding flow rate selection means, disposed so as to slide in parallel patterns, for introducing said flow rate information, each said flow rate selection means introducing a volume for a particular time period of a said inspiration, each said flow selection means having an indicator, the position of which indicates the relative flow rate for its associated time period of said inspiration, the indicators of said flow rate selection means collectively forming points above a reference line defining a curve which represents the flow rate with respect to time of said flow rate information for said inspiration.
Claim 3
Dependent Claim
16 words
The ventilator of claim 1 wherein said indicators are levers of said flow rate selection means.
Claim 4
Independent Claim
109 words
A method of controlling an artificial ventilator having a variable gas flow rate during a patient's inspiration comprising: introducing flow rate information as a plurality of volumes distributed over the time of a single inspiration; and controlling the gas flow of said ventilator so as to match the flow rate of said ventilator with the flow rate of said flow rate information at a corresponding time during said inspiration; and monitoring the flow rate of a patient's inspiration while the patient breathes unaided; wherein said flow rate information introduced is indicative of the patient's unaided flow rate at a plurality of points in time distributed during the patient's inspiration.
Claim 5
Independent Claim
109 words
A method of controlling an artificial ventilator having a variable gas flow rate during a patient's inspiration comprising: introducing flow rate information as a plurality of volumes distributed over the time of a single inspiration; and controlling the gas flow of said ventilator so as to match the flow rate of said ventilator with the flow rate of said flow rate information at a corresponding time during said inspiration; and monitoring the flow rate of a patient's inspiration while the patient breathes unaided; wherein said flow rate information introduced is indicative of the patient's unaided flow rate at a plurality of points in time distributed during the patient's inspiration.
Claim 6
Dependent Claim
60 words
The method of claim 3 wherein said step of introducing utilizes a plurality of sliding volume selection means, each corresponding to the volume at an instant of time during said inspiration, said step of introducing including positioning each said sliding volume selection means to indicate the rate of said gas flow for its corresponding instant in time during said inspiration.
Claim 7
Dependent Claim
112 words
An artificial ventilator comprising: an inspiration gas circuit; means for introducing an input representative of a flow rate pattern of an inspiration gas wherein said input corresponds to a plurality of volumes to be distributed over the time of a single inspiration, said volumes over time constituting said flow rate pattern; computer means for providing a control cycle of operation in response to said input from said means for introducing, said control cycle of operation comprising a flow increasing step, a flow decreasing step and a flow constant step; valve means for controlling the flow rate of the inspiration gas in response to said control cycle of operation from said computer means.
Claim 8
Dependent Claim
112 words
An artificial ventilator comprising: an inspiration gas circuit; means for introducing an input representative of a flow rate pattern of an inspiration gas wherein said input corresponds to a plurality of volumes to be distributed over the time of a single inspiration, said volumes over time constituting said flow rate pattern; computer means for providing a control cycle of operation in response to said input from said means for introducing, said control cycle of operation comprising a flow increasing step, a flow decreasing step and a flow constant step; valve means for controlling the flow rate of the inspiration gas in response to said control cycle of operation from said computer means.
Claim 9
Dependent Claim
186 words
An artificial ventilator having a variable gas flow rate during a patient's inspiration or expiration comprising: input means for introducing flow rate information; and means, responsive to said flow rate information developed by said input means, for controlling the rate of said gas flow to match the flow rates introduced by said flow rate information; said input means introducing said flow rate information as a plurality of volumes distributed over the time of a single inspiration to allow introduction of time related flow rate information; said input means including a plurality of sliding volume selection means, disposed so as to slide in parallel patterns, for introducing said flow rate information, each said volume selection means introducing a volume for a particular time period of a said inspiration; each said volume selection means having an indicator, the position of which indicates the relative flow rate for its associated time period of said inspiration, the indicators of said volume selection means collectively forming points above a reference line defining a curve which represents the flow rate with respect to time of said flow rate information for said inspiration.
Claim 10
Dependent Claim
186 words
An artificial ventilator having a variable gas flow rate during a patient's inspiration or expiration comprising: input means for introducing flow rate information; and means, responsive to said flow rate information developed by said input means, for controlling the rate of said gas flow to match the flow rates introduced by said flow rate information; said input means introducing said flow rate information as a plurality of volumes distributed over the time of a single inspiration to allow introduction of time related flow rate information; said input means including a plurality of sliding volume selection means, disposed so as to slide in parallel patterns, for introducing said flow rate information, each said volume selection means introducing a volume for a particular time period of a said inspiration; each said volume selection means having an indicator, the position of which indicates the relative flow rate for its associated time period of said inspiration, the indicators of said volume selection means collectively forming points above a reference line defining a curve which represents the flow rate with respect to time of said flow rate information for said inspiration.
Claim 11
Dependent Claim
16 words
The ventilator of claim 6 wherein said indicators are levers of said flow rate selection means.
Claim 12
Dependent Claim
26 words
The ventilator of claim 6 further comprising: an inspiration gas circuit, said means for controlling varying the rate of gas flow within said inspiration gas circuit.
Claim 13
Dependent Claim
130 words
An artificial ventilator having a variable gas flow rate during a patient's inspiration or expiration comprising: input means for introducing flow rate information; and means, responsive to said flow rate information developed by said input means, for controlling the rate of said gas flow to match the flow rates introduced by said flow rate information; said input means introducing said flow rate information as a plurality of volumes distributed over the time of a single inspiration to allow introduction of time related flow rate information; and flow sensor means for monitoring the flow rate of an inspiration of a patient while the patient breathes unaided and wherein said flow rate information introduced by said input means is adjustable in accordance with the flow rate monitored by said flow sensor means.
Claim 14
Dependent Claim
130 words
An artificial ventilator having a variable gas flow rate during a patient's inspiration or expiration comprising: input means for introducing flow rate information; and means, responsive to said flow rate information developed by said input means, for controlling the rate of said gas flow to match the flow rates introduced by said flow rate information; said input means introducing said flow rate information as a plurality of volumes distributed over the time of a single inspiration to allow introduction of time related flow rate information; and flow sensor means for monitoring the flow rate of an inspiration of a patient while the patient breathes unaided and wherein said flow rate information introduced by said input means is adjustable in accordance with the flow rate monitored by said flow sensor 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) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |