Abstract: The ventilation module (8) regulates the inspiratory pressure (P) according to an inspiratory pressure order (AI). A control module (9) compares the breathed volume at each cycle (VTI) with a minimum volume order (VTImini) and varies the pressure order (AI) in the direction tending to maintain the breathed volume (VTI) just over the minimum (VTImini), but keeping the pressure order (AI) within the interval comprised between the two extreme values (AImini, AImaxi). Utilization to combine the advantages of the pressure mode ventilation with those of the volumetric ventilation.
Type:
Grant
Filed:
May 7, 1999
Date of Patent:
March 15, 2005
Assignee:
Nellcor Puritan Bennett France Developpement
Abstract: A compressor driven by a motor sends to a nasal mask a breathable gas at a low positive relative pressure whereby the motor is controlled to maintain the pressure in the delivery pipe of the compressor substantially equal to a set point, independently of the inspiration and expiration of the patient, a computer receiving on an input a motor speed signal as a parameter representative of the respiratory activity of the patient and analyzing the motor speed variations whereby the computer will increase the pressure set point if necessary or reduces the pressure set point by a predetermined amount depending upon whether there is a hypopnoea or the absence thereof.
Type:
Grant
Filed:
February 1, 2001
Date of Patent:
June 3, 2003
Assignee:
Nellcor Puritan Bennett France Developpement
Abstract: A compressor driven by a motor sends to a nasal mask a breathable gas at a low positive relative pressure whereby the motor is controlled to maintain the pressure in the delivery pipe of the compressor substantially equal to a set point, independently of the inspiration and expiration of the patient, a computer receiving on an input a motor speed signal as a parameter representative of the respiratory activity of the patient and analyzing the motor speed variations whereby the computer will increase the pressure set point if necessary or reduces the pressure set point by a predetermined amount depending upon whether there is a hypopnoea or the absence thereof.
Type:
Grant
Filed:
April 14, 1997
Date of Patent:
September 4, 2001
Assignee:
Nellcor Puritan Bennett France Developpement
Abstract: The ventilation module (8) regulates the inspiratory pressure (P) according to an inspiratory pressure order (AI). A control module (9) compares the breathed volume at each cycle (VTI) with a minimum volume order (VTImini) and varies the pressure order (AI) in the direction tending to maintain the breathed volume (VTI) just over the minimum (VTImini), but keeping the pressure order (AI) within an interval comprised between the two extreme values (AImini, AImaxi). Utilization to combine the advantages of the pressure mode ventilation with those of the volumetric ventilation.
Type:
Grant
Filed:
March 12, 1997
Date of Patent:
July 13, 1999
Assignee:
Nellcor Puritan Bennett France Developpement