초록 ▼

Normal breathing cycles of a ventilator cause an alarm controller circuit to emit a periodic pulse which resets a timer circuit thereby maintaining an alarm device in an “off”condition. Patient disconnect is sensed by an alarm trigger circuit which sends an inhibit pulse to the controller circuit in

Normal breathing cycles of a ventilator cause an alarm controller circuit to emit a periodic pulse which resets a timer circuit thereby maintaining an alarm device in an “off”condition. Patient disconnect is sensed by an alarm trigger circuit which sends an inhibit pulse to the controller circuit inhibiting the timer circuit reset pulse. This causes the timer to “time out”thereby turning on an alarm actuator circuit which causes an audible and/or visual alarm condition.

대표청구항 ▼

A fluidic patient disconnect alarm system for a fluidically controlled patent ventilator apparatus comprising control means utilizing a pressurized breathing gas for intermittently supplying gas to a patient breathing hose communicating with an expiratory valve which comprises; first means responsiv

A fluidic patient disconnect alarm system for a fluidically controlled patent ventilator apparatus comprising control means utilizing a pressurized breathing gas for intermittently supplying gas to a patient breathing hose communicating with an expiratory valve which comprises; first means responsive to said ventilator apparatus for providing a periodic inspiratory fluidic pressure signal; patient breathing hose disconnect alarm trigger circuit means for producing a fluidic pressure signal representing a patient disconnect; a fluidic alarm controller circuit having first and second input ports and first and second output ports, the first input port coupled to said first means, said controller circuit including means responsive to said periodic inspiratory fluidic pressure signal from the ventilator for producing an output timer reset signAl at the first output port; the second input port coupled to said patient breathing hose disconnect alarm trigger circuit means, said controller circuit including means responsive to said fluidic pressure signal from a patent breathing hose disconnect alarm trigger circuit means for producing a timer reset inhibit signal at the second output port; timer circuit means; an alarm actuating circuit; alarm means; said alarm trigger circuit means having an input port for sensing the pressure of the breathing gas at the patient hose outlet, an output port in fluidic communication with the input port and providing said fluidic pressure signal to the second input port of the alarm controller circuit in response to a sensed pressure loss in the breathing hose representing a patient disconnect; said timer circuit means having an input port fluidically coupled to the first output port of the alarm controller circuit for receiving said reset signal, and an output port coupled to said alarm actuating circuit and providing a timed output pressure signal said alarm actuating circuit having an input port fluidically coupled to the output port of the timer circuit means, and an output port for providing an alarm actuating pressure signal and fluidically coupled to actuate said alarm means; said alarm actuating circuit having means for providing said alarm actuating pressure signal to said alarm means in the absence of said timed output pressure signal from said timer circuit means.