US3923055A
Expired / Lapsed
US
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Process and device for controlling the pressure course of a respirator
Assignee: HAMMACHER KONRAD SONNENHEIM 15 CH 6344 MEIERSKAPPEL SWITZERLAND
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Filing: 1974-11-15
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Granted: 1975-12-02
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Expires: 1994-11-15
Abstract
Abstract A process and apparatus are disclosed for controlling the pressure course of a respirator connected to a patient, in which the pressure of the respiration gas is momentarily decreased, under the control of a pulse-synchronized signal waveform derived from physiological data taken from the patient, for example, the ECG, during the propagation time of each pulse wave in the alveolar flow path of the patient. Following each decrease there is immediately effected a substantial re-establishment of the pressure of the respiration gas. Disclosed apparatus suitable for performing this operation comprises a timer circuit responsive to the pulse-synchronized signals generated from the patient''s physiological data and a valve arrangement which is coupled into the patient respirator line and controlled by the output pulse waveform of the timer circuit.
Inventors
- 👤 Konrad Hammacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:05
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/021; A61M16/022; A61M16/0003; A61M2016/003; A61M2016/0033; A61M2016/0039; A61M2230/00; A61M2230/04
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
79 words
A process for controlling the pressure course of a respirator comprising momentarily decreasing the pressure of the respiration gas under the control of a pulse-synchronized signal derived from a measurement of impulses produced by the heart of the patient associated with the respirator in each case during the propagation time of the pulse wave in the pulmonary alveolar blood vessel flow paths of the patient and immediately thereafter causing substantially a re-establishment of the pressure of the respiration gas.
Claim 2
Dependent Claim
79 words
A process for controlling the pressure course of a respirator comprising momentarily decreasing the pressure of the respiration gas under the control of a pulse-synchronized signal derived from a measurement of impulses produced by the heart of the patient associated with the respirator in each case during the propagation time of the pulse wave in the pulmonary alveolar blood vessel flow paths of the patient and immediately thereafter causing substantially a re-establishment of the pressure of the respiration gas.
Claim 3
Dependent Claim
16 words
A process according to claim 1 wherein the pulse-synchronized signal is derived from the patient''s ECG.
Claim 4
Dependent Claim
17 words
A process according to claim 1 wherein the pulse-synchronized signal is generated from a patient-derived blood-pressure signal.
Claim 5
Dependent Claim
36 words
A process according to claim 1 further comprising delaying the pulse-synchronized signals and reforming same into impulses corresponding to the duration of the passage of the pulse wave through the pulmonary alveolar blood vessel flow paths.
Claim 6
Dependent Claim
35 words
A process according to claim 1 further comprising producing a control signal from the pulse-synchronized signal and superimposing same on the pressure course of a respirator via a valve means connected into the respiration line.
Claim 7
Dependent Claim
27 words
A process according to claim 5 further comprising coupling the patient line to a reduced pressure via a valve means for the duration of the control impulse.
Claim 8
Dependent Claim
27 words
A process according to claim 1 further comprising generating a control signal from the pulse-synchronized signal and using same for controlling the time cycle of a respirator.
Claim 9
Dependent Claim
22 words
A process according to claim 1 further comprising providing additional pneumatic means for shortening the pressure increase following the reduction in pressure.
Claim 10
Dependent Claim
162 words
Apparatus for controlling the pressure course of a respirator, in which the pressure of the respiration gas is momentarily decreased, under the control of a pulse synchronized signal derived from a measurement of impulses produced by the heart taken from a patient associated with the respirator, during the propagation time of the pulse wave in the pulmonary alveolar blood vessel flow paths of the patient and is immediately substantially re-established thereafter, comprising first means for deriving the pulse synchronized signal from said measurement taken from a patient, second means contained in the line from a respiration gas source to the patient for controllably reducing the pressure momentarily in the patient line, and timer means responsive to the pulse synchronized signals generated by said first means for controlling said second means, said timer means including means for delaying said second means for a time period which elapses between the measuring incident and the arrival of the pulse wave in the alveolar blood vessels.
Claim 11
Dependent Claim
162 words
Apparatus for controlling the pressure course of a respirator, in which the pressure of the respiration gas is momentarily decreased, under the control of a pulse synchronized signal derived from a measurement of impulses produced by the heart taken from a patient associated with the respirator, during the propagation time of the pulse wave in the pulmonary alveolar blood vessel flow paths of the patient and is immediately substantially re-established thereafter, comprising first means for deriving the pulse synchronized signal from said measurement taken from a patient, second means contained in the line from a respiration gas source to the patient for controllably reducing the pressure momentarily in the patient line, and timer means responsive to the pulse synchronized signals generated by said first means for controlling said second means, said timer means including means for delaying said second means for a time period which elapses between the measuring incident and the arrival of the pulse wave in the alveolar blood vessels.
Claim 12
Dependent Claim
37 words
A device according to claim 9 wherein said second means is a valve arrangement which in one position connects the respiration gas source with the patient and in its other position connects the patient with the atmosphere.
Claim 13
Dependent Claim
22 words
A device according to claim 10 wherein said valve arrangement is connected with a reduced pressure chamber in said other switching position.
Claim 14
Dependent Claim
23 words
A device according to claim 10 wherein said valve arrangement connects the patient line with a suction pump in said second switching position.
Claim 15
Dependent Claim
14 words
A device according to claim 9 wherein said second means is a pump arrangement.
Claim 16
Dependent Claim
20 words
A device according to claim 9 wherein said second means is comprised of the control valve of a valve-controlled respirator.
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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |