a ventilator

Abstract

The invention provides a respirator. The respirator comprises an inspiration pipeline, an expiration pipeline, an expectoration pipeline and a central processing unit; the inspiration pipeline is provided with a positive pressure source for supplying positive pressure to a patient, a buffer tank and a two-position two-way balloon valve, and the two-position two-way balloon valve is subjected to on-off switching control through an air pump and a first two-position three-way valve; the expiration pipeline is provided with an expiration valve which is controlled though a second two-position three-way valve by receiving compressed air which is from the buffer tank and has preset constant pressure; the expectoration pipeline is provided with a negative pressure source for supplying negative pressure to the patient and a fast valve which is connected between the negative pressure source and the patient in series; the central processing unit conducts cooperative control over all the parts of the respirator according to data detected by a sensor in the respirator. According to the respirator, an expectoration machine can be embedded into the respirator by serving as a module, and higher precision, responsibility and safety are achieved; by adopting the same central processing unit, the system structure is simplified, and respiration and expectoration work of the respirator can achieve real synchronousness.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a ventilator with the function of coughing up sputum. Background technique [0002] For patients who are on a ventilator, especially after the artificial airway is established, the cough reflex is weakened, or due to severe decline in lung function, respiratory muscle weakness, etc., most of them cannot expel sputum spontaneously, which can easily cause secretions to stay and block the airway make lung infections worse. Therefore, for mechanically ventilated patients, manual sputum removal is required on a regular basis. At present, it is commonly used clinically to suck sputum with a sputum suction tube, but the invasive sputum suction method of sputum suction tube is easy to damage the airway due to the high local negative pressure and the insertion and movement of the catheter. Cause injury or airway scarring, at the same time, it will interrupt the patient's mechanical ventil...

AI Technical Summary

Problems solved by technology

This will have a certain degree of time lag in the control, affecting the expectoration effect

[0007] 2. Safety: subject to various environmental conditions, the detection of the breathing process may bring wrong results, which is easy to cause misjudgment. The internal conditions of the breathing circuit are very complicated, such as gaseous water vapor and liquid water, and even the patient coughs up The sputum may be distributed in every corner of the breathing circuit. These factors will directly affect the accuracy of the detection results of the pressure or flow sensor, or even wrong results.

causing a safety hazard

[0008] 3. The pipeline connection is complex, occupying a large space, high cost, and many failure points and leakage points

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