초록 ▼

Respiration therapy is accomplished by generating pulses of inhalation gas for delivery to a patient. The inhalation gas pulses may be generated by entraining humidified low pressure gas with pulses of high pressure entrainment gas. The pulses of entrainment gas may be of variable frequency, duratio

Respiration therapy is accomplished by generating pulses of inhalation gas for delivery to a patient. The inhalation gas pulses may be generated by entraining humidified low pressure gas with pulses of high pressure entrainment gas. The pulses of entrainment gas may be of variable frequency, duration and duty cycle and are produced by modulating the flow of a highly pressured gas with a solenoid operated valve.

대표청구항 ▼

CM,1. A method for generating gas pulses for use in respiration therapy comprising the steps of: providing a flow of primary gas; periodically interrupting the primary gas flow by means of a normally closed solenoid actuated valve; generating solenoid control voltage pulses having first and second v

CM,1. A method for generating gas pulses for use in respiration therapy comprising the steps of: providing a flow of primary gas; periodically interrupting the primary gas flow by means of a normally closed solenoid actuated valve; generating solenoid control voltage pulses having first and second voltage magnitude levels, said voltage levels including an initial magnitude in excess of the rated voltage of the solenoid and a second contiguous magnitude less than the said rated voltage and sufficient to hold the solenoid in the actuated state; and applying said voltage pulses to the valve solenoid to cause the generation of gas pulses.