Sputum clearance system simulating human cough

Abstract

The invention relates to the technical field of medical apparatus and instruments, in particular to a sputum clearance system simulating human cough. The system comprises a direct-current brushless blower, two-position three-way electromagnetic valve, a first pressure sensor, a second pressure sensor, a gas tank, a vacuum pump, a direct-current brushless blower driver, a central processor and a man-machine interface; an air outlet of the direct-current brushless blower is communicated with an air inlet connector of the three-position three-way electromagnetic valve, and the air outlet connector of the two-position three-way electromagnetic valve is communicated with a respiration mask; the gas tank is communicated with the exhaust connector of the two-position three-way electromagnetic valve; the gas tank is communicated with an inlet of the vacuum pump; the direct-current brushless blower driver is electrically connected with the direct-current brushless blower; the two-position three-way electromagnetic valve, the first pressure sensor, the second pressure sensor, the vacuum pump and the direct-current brushless blower driver are electrically connected with the central processor,and the central processor is electrically connected with the man-machine interface. The sputum clearance system can sufficiently expand the lung, is good in sputum coughing up effect and easy and convenient to operate, and can be displayed visually.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a sputum removal system for simulating human cough. Background technique [0002] For a healthy human body, a normal cough can clear the accumulated secretions in the airway and protect the human respiratory system. A normal cough consists of three processes: deep inhalation to expand the lungs; the glottis closes at the same time as the chest cavity and diaphragm contract, increasing the pressure in the lungs; the glottis suddenly opens, and the high-speed airflow will be generated due to the pressure difference between the inside and outside of the lungs. Carry secretions in the airway out. The normal cough peak flow range of the human body is 360-720L / min. [0003] However, for patients with neuromuscular diseases, emphysema, chronic obstructive pulmonary disease, and mechanical ventilation, due to their respiratory muscle weakness, airway obstruction, and epiglottis...

AI Technical Summary

Problems solved by technology

[0007] 1. The positive pressure air supply time does not match the patient's physical condition, and the lungs cannot be fully expanded

[0008] The intake time of Coughassist is set by the medical staff before starting work, but for patients with different conditions, the following two situations may occur: (1) The lungs are not fully expanded within the set time, and the intake volume is insufficient; (2) The lungs have been fully expanded before the set time, and the excess air supply may cause overinflation and cause discomfort to the patient

[0009] 2. The time of negative pressure exhaust does not match the exhaust condition of the patient, which may easily cause excessive exhaust, and the reduction of lung pressure will cause the lungs to shrink

For different patients, the time for coughing up sputum is not the same. If the time is set too short, the gas in the lungs may not be completely discharged, and the effect of expectoration will be greatly reduced; if the time is set too long, it may cause excessive exhaust and lung low pressure, shrinking lungs

[0011] 3. When setting the intake and exhaust pressure, it is necessary to manually adjust the mechanical knob continuously, which is time-consuming and laborious

[0013] 4. The pressure and flow during the expectoration process are not monitored and cannot be displayed intuitively to the operator

[0014] Because there is no flow sensor for monitoring gas flow and pressure sensor for monitoring gas pressure in coughassist, it is impossible to reflect the pressure and flow conditions in the actual working process to the medical staff in real time

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