US Patent No: 5,307,795
Number of patents in Portfolio can not be more than 2000
Medical ventilators
Stats
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May 3, 1994
Issued date -
Jan 24, 1992
filing date -
07/778,131
serial no -
In Force
status
Importance
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Abstract
A medical ventilator comprises a ventilator duct having an inlet for respiratory fresh gas. The pressure at which the respiratory fresh gas is supplied to the patient is determined by a driving jet disposed in the ventilator duct at a distance from the inlet so that an intervening column of gas acts as a pneumatic piston. The supply of driving gas to the jet is initially set by a regulator to obtain a desired value of a respiratory parameter, such as the volume of gas ventilating the patient's lungs during the breathing cycle. The volume of gas expelled from the patient's lungs is monitored during operation by detecting means and the regulator is adjusted by a servomotor in response to any change in the measured parameter in order to maintain the parameter at the desired value.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 4,481,944 Apparatus and method for assisting respiration | 75 | 1981 | |
| 4,471,773 Apparatus and method for delivering medication to patient's respiratory system | 27 | 1983 | |
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| 4,520,812 Method and apparatus for controlling a pressure level in a respirator | 38 | 1983 | |
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| 4,957,107 Gas delivery means | 160 | 1988 | |
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| 4,971,049 Pressure sensor control device for supplying oxygen | 51 | 1989 | |
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| 4,537,190 Process and device for controlling artificial respiration | 44 | 1982 | |
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| 5,107,830 Lung ventilator device | 173 | 1990 | |
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| 4,495,946 Artificial breathing device | 18 | 1981 | |
| 4,596,247 Respirator | 11 | 1983 | |