US Patent No: 5,307,795

Number of patents in Portfolio can not be more than 2000

Medical ventilators

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Importance

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Abstract

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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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Patent Owner(s)

Patent OwnerAddressTotal Patents
CADUCEUS LIMITEDLONDON2

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chakrabarti, Mihir K Greenford, GB2 4 84
Whitwam, James G London, GB2 4 84

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Bunnell Life Systems, Inc. (2)
4,481,944 Apparatus and method for assisting respiration 84 1981
4,471,773 Apparatus and method for delivering medication to patient's respiratory system 30 1983
 
Dragerwerk Aktiengesellschaft (1)
4,520,812 Method and apparatus for controlling a pressure level in a respirator 45 1983
 
DRIBMED, LTD. (1)
4,957,107 Gas delivery means 183 1988
 
SUNRISE MEDICAL HHG INC. (1)
4,971,049 Pressure sensor control device for supplying oxygen 59 1989
 
SYNTHELABO (1)
4,537,190 Process and device for controlling artificial respiration 50 1982
 
UNIVERSITY OF MANITOBA (1)
5,107,830 Lung ventilator device 207 1990
 
Other [Check patent profile for assignment information] (2)
4,495,946 Artificial breathing device 23 1981
4,596,247 Respirator 12 1983

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
COVIDIEN LP (11)
8,652,064 Sampling circuit for measuring analytes 0 2008
8,425,428 Nitric oxide measurements in patients using flowfeedback 0 2009
8,335,992 Visual indication of settings changes on a ventilator graphical user interface 1 2009
8,453,645 Three-dimensional waveform display for a breathing assistance system 1 2010
8,499,252 Display of respiratory data graphs on a ventilator graphical user interface 1 2010
8,443,294 Visual indication of alarms on a ventilator graphical user interface 0 2010
8,783,250 Methods and systems for transitory ventilation support 0 2011
8,776,792 Methods and systems for volume-targeted minimum pressure-control ventilation 0 2011
8,597,198 Work of breathing display for a ventilation system 0 2011
8,555,881 Ventilator breath display and graphic interface 0 2011
8,555,882 Ventilator breath display and graphic user interface 0 2012
 
UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC. (7)
5,887,611 Gas blender 25 1996
6,390,091 Method and apparatus for controlling a medical ventilator 104 1999
6,796,305 Ventilator monitor system and method of using same 65 2000
6,571,796 Tracheal pressure ventilation respiratory system 46 2001
7,066,173 Medical ventilator and method of controlling same 60 2003
7,210,478 Ventilator monitor system and method of using same 64 2004
8,122,883 Medical ventilator and method of controlling same 1 2006
 
RESMED LIMITED (3)
6,910,480 Patient-ventilator synchronization using dual phase sensors 31 2000
7,055,522 Patient-ventilator synchronization using dual phase sensors 23 2004
7,934,499 Patient-ventilator synchronization using dual phase sensors 21 2005
 
RESMED PARIS (2)
7,905,231 Breathing assistance apparatus 17 2004
8,353,292 Breathing assistance apparatus 0 2011
 
EVENT MEDICAL LTD. (1)
7,219,666 Ventilator 16 2004
 
HILL-ROM SERVICES PTE. LTD (1)
8,251,876 Breathing exercise apparatus 0 2008
 
SALTER LABS (1)
6,378,520 Variable pressure and flow control for a pneumatically-operated gas demand apparatus 34 1999
 
Western/Scott Fetzer Company (1)
6,612,307 Oxygen conserver 7 2001

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