Respirators and control methods for respirators

Abstract

The invention relates to a respirator which comprises a breathing tube connecting piece used for being connected with a breathing tube; an actuator pneumatically connected to the breathing tube connection via which air is delivered to the patient; and a respiration sensor connecting piece which is used for providing respiration sensor signals for the respiration sensor, and a controller that calculates the inhaling volume according to the breathing signal and calculates the inhaling volume and the exhaling volume according to the lung volume signal of each breathing. The controller is furtherconfigured to determine when the exhaled volume exceeds an adjustable value of the associated inhalation volume, increasing the pressure at the end of the exhalation. And when the oxygen saturation isreduced to be lower than the lower limit, the pressure at the end of expiration is increased. Whether the oxygen saturation is reduced to be lower than the lower limit or not is determined, and if yes, the standby ventilation is started at a preset frequency. And when the oxygen saturation exceeds the lower limit again, the standby ventilation frequency is reduced. In another embodiment, stand-byventilation is terminated when the oxygen saturation exceeds an average limit. The invention also relates to a corresponding control method.

Description

technical field [0001] The field of the invention includes respirators of the type mentioned in the preambles of claims 1 , 3 , 5 and 7 , and control methods of the type mentioned in the preambles of claims 10 , 12 and 15 . [0002] EP 2091429 B1 discloses a respirator according to the preambles of claims 1 and 9 . [0003] The present invention relates to the field of respirators and control methods thereof, in particular to respirators considering the oxygen saturation in blood measured by an oximeter. Background technique [0004] It is well known that mechanically ventilated respirators produce various forms of oxygen deficiency. (Roche Lexikon Medizin, 4 th ed., Urban & Fischer Verlag, Munich). This type of respirator is also known as a ventilator. There are three basic types: [0005] a) Pressure-controlled respirators: the inspiratory phase is terminated when a predetermined breathing pressure is reached in the device. Exhalation is mostly passive. [0006] b)...

AI Technical Summary

Problems solved by technology

Other flow modes, such as deceleration, acceleration, and sinusoidal flow, are practically no longer used in volume-controlled ventilation, as they do not provide any conceivable benefit

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