Positive and negative pressure breathing machine

Abstract

The invention provides a positive and negative pressure breathing machine. The positive and negative pressure breathing machine comprises a face breathing device, a main controller, a positive pressure airflow generating device and a negative pressure airflow generating device, wherein the positive pressure airflow generating device and the negative pressure airflow generating device are electrically connected with the main controller and communicated with the face breathing device. A pipeline for communicating the positive pressure airflow generating device and the face breathing device and a pipeline for communicating the negative pressure airflow generating device and the face breathing device do not carry out communication at the same time. A pressure sensor is arranged on the pipeline for communicating the positive pressure airflow generating device and the face breathing device, and a pressure sensor is arranged on the pipeline for communicating the negative pressure airflow generating device and the face breathing device. The positive and negative pressure breathing machine overcomes the defect that an existing noninvasive breathing machine can not be directly used for measuring the airway critical closing pressure of normal people with the airway critical closing pressure as a negative value; a doctor can measure the airway critical closing pressure of a related patient conveniently, and the measuring precision can be improved.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a positive and negative pressure ventilator. Background technique [0002] Airway critical closure pressure (Pcrit), which refers to the pressure when the upper airway is completely occluded in the sleep state, is considered to be a reliable indicator for evaluating the dynamic characteristics of the upper airway, and is usually used to assess the risk of sleep apnea syndrome in normal people. high and low. [0003] The critical airway closing pressure of normal people is mostly lower than -8cmH2O, so regardless of exhalation or inhalation during sleep, the upper airway is always open. In patients with sleep apnea syndrome, the critical airway closing pressure can reach 0cmH2O or even above. [0004] At present, most non-invasive ventilators at home and abroad are positive pressure ventilators, which cannot directly measure the critical airway closing pressure of the above-ment...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a positive and negative pressure ventilator for overcoming the inability of the existing non-invasive ventilator to directly It is used to measure the deficiency of airway critical closing pressure of normal population whose airway critical closing pressure is negative, and is used to improve the convenience and accuracy of measuring airway critical closing pressure of patients

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