초록 ▼

A fluidically-operated respirator comprises an apneic event circuit (10) and a demand gas circuit (20). The apneic event circuit (10) comprises a variable capacitance device (132) and an exhaust means (130) which rapidly discharge fluid from the circuit (10) when an inspiration occurs. If an apneic

A fluidically-operated respirator comprises an apneic event circuit (10) and a demand gas circuit (20). The apneic event circuit (10) comprises a variable capacitance device (132) and an exhaust means (130) which rapidly discharge fluid from the circuit (10) when an inspiration occurs. If an apneic event occurs, the circuit (10) activates one or more signals (136) as a predetermined volume of fluid is built up in the circuit (10). The demand gas circuit (20) of the respirator supplies respirating gas to a patient at the beginning of an inspiration and for a time period which is a fraction of the duration of the inspiration.

대표청구항 ▼

A method of detecting apneic events comprising the steps of: sensing pressure in an in vivo respiratory system, negative pressure in said respiratory system being created by an attempt to inspire and nonnegative pressure in said system being indicative of noninspiration; generating a first fluid sig

A method of detecting apneic events comprising the steps of: sensing pressure in an in vivo respiratory system, negative pressure in said respiratory system being created by an attempt to inspire and nonnegative pressure in said system being indicative of noninspiration; generating a first fluid signal whenever nonnegative pressure occurs in said in vivo respiratory system, said first fluid signal having a duration related to the duration of said nonnegative pressure; applying said first fluid signal to an elastic capacitance device, said elastic device having a pre-determined maximum capacity for storing a volume of fluid substantially equal to a volume of fluid created by the continuous application of said first fluid signal for a predetermined time period; discharging said elastic capacitance whenever negative pressure occurs in said in vivo respiratory system and, activating a signaling means to indicate an apneic event whenever the pressure created in said elastic capacitance device by the continuous application of said first fluid signal for a time greater than the pre-determined time period exceeds the maximum capacity of the elastic capacitance device.