Breathing machine breathing phase control method based on dynamic threshold value

Abstract

A breathing machine breathing phase control method based on a dynamic threshold value is characterized in that two threshold values are set for a breathing machine, one threshold value is a static threshold value, the other threshold value is a dynamic threshold value, the static threshold value is larger than the dynamic threshold value, and the static threshold value is used for achieving static control of a patient in a non-breathing state; in the static control, the breathing machine outputs gas which takes a static reference value as a basis and takes a static threshold value as an up-down floating range and has relatively fixed pressure and flow. The dynamic threshold value is used for achieving dynamic control of the patient in the breathing state, and in the dynamic control process, the breathing machine outputs gas with the pressure and the flow in a breathing wave shape based on the dynamic reference value. The breathing phase is controlled in a double-threshold control mode, static control and dynamic control are switched, the problems of breathing phase control lag and false triggering in the prior art can be effectively solved, the breathing phase of the breathing machine can better follow the breathing rhythm of a patient, and the breathing comfort can be dynamically adjusted.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a breathing phase control method of a ventilator. The control method can effectively solve the false triggering and respiratory phase lag problems caused by the fixed threshold control of the existing ventilator. Background technique [0002] In modern clinical medicine, the ventilator, as an effective means of artificially replacing the spontaneous ventilation function, has been widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgery, respiratory support treatment and emergency resuscitation. It occupies a very important position in the field of modern medicine. Ventilator is a vital medical equipment that can prevent and treat respiratory failure, reduce complications, save and prolong the life of patients. [0003] Respiratory phase control is an important performance of the ventilator. The usual practice is to obt...

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Problems solved by technology

[0005] Judging from the prior art and the above-mentioned patent applications, in the past, in the respiratory phase control of the ventilator, the preset threshold value for judging the breathing characteristics of the patient all adopts a fixed threshold method, and the preset fixed threshold method exists in the actual control of the ventilator. The obvious disadvantage is: if the preset fixed threshold range is too large, there will be a lag in respiratory phase control, resulting in poor breathing followability and reduced breathing comfort; if the preset fixed threshold range is too small, the judgment will be relatively sensitive and easy. Generate false triggers, that is, due to external interference, it is mistaken for the patient's breathing characteristics

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