초록 ▼

In various embodiments of a respirating gas supply method and apparatus a control circuit (32) responsive to a sensor (28) operates valve means (26) to supply pulses of respirating gas through a single hose cannula (48) to an in vivo respiratory system when negative pressure indicative of inspiratio

In various embodiments of a respirating gas supply method and apparatus a control circuit (32) responsive to a sensor (28) operates valve means (26) to supply pulses of respirating gas through a single hose cannula (48) to an in vivo respiratory system when negative pressure indicative of inspiration is sensed by the sensor (28). The control circuit (32) operates the valve (26) to communicate the in vivo respiratory system with a supply of gas (20) only if the negative pressure sensed by the sensor (28) does not occur within a predetermined yet selectively variable required minimum delay interval between successive pulsed applications of gas to the in vivo respiratory system. The pulse of gas applied to the in vivo respiratory system can be spiked pulses or square pulses. Humidifiers, nebulizers, and sources of a second gas are provided in accordance with various embodiments. Apnea event detection is also provided.

대표청구항 ▼

An apparatus for sensing negative pressure in an in vivo respiratory system and for supplying gas to said in vivo respiratory system, said apparatus comprising: valve means having first, second and third ports, said first port being selectively communicable with either said second port or said third

An apparatus for sensing negative pressure in an in vivo respiratory system and for supplying gas to said in vivo respiratory system, said apparatus comprising: valve means having first, second and third ports, said first port being selectively communicable with either said second port or said third port; a single line connected to said first port of said valve means, said line adapted both to transmit to said valve means negative pressure indicative of an inspiration in said in vivo respiratory system and to transmit gas to said in vivo respiratory system; a source of gas communicating with said second port of said valve means; means for sensing negative pressure in said in vivo respiratory system, said sensing means communicating with said third port of said valve means; and, means for controlling said valve means, said control means being responsive to said sensing means for selectively connecting said first port of said valve means to said second port thereof when negative pressure is sensed and for maintaining said connection for at least a portion of the time duration of said negative pressure in said in vivo respiratory system so that gas may be supplied to said in vivo respiratory system, said control means also being adapted to reconnect said first port of said valve means to said third port thereof after the application of gas to said in vivo respirating system.