Respirator

Abstract

An respirator comprises an inhale gas circuit, wherein a positive pressure source which is provided the positive pressure for patient is arranged on the inhale gas circuit; an expiration-and-cough gas circuit, wherein a negative pressure source which is provided the negative pressure for patient is arranged on the expiration-and-cough gas circuit and concatenated with a fast-gate valve between the negative pressure source and the patient, a suction port is connected with an air vent when the negative pressure source is not work. The respirator further comprises a central processing unit; each module is conducted cooperative control by detected data detected from a sensor module and the sensor in other module; an inhale control module, wherein the positive pressure is controlled and provided with the patient; a negative pressure control module, wherein the negative pressure is controlled and provided with the patient; an expiration-and-cough control module, wherein the fast-gate valve is controlled; the sensor module, wherein the inhale and PEEP pressure sensor are concatenated between the positive pressure and the patient; the expiration-and-cough pressure sensor is concatenated between the negative pressure and the patient. The respirator has the advantages by higher accuracy, responsiveness and safety.

Description

technical field [0001] The invention relates to the field of medical devices, and more specifically, provides a ventilator. Background technique [0002] As a medical device that can replace or assist patients to complete mechanical ventilation, the ventilator has been widely used clinically. For those patients who are on a ventilator, they usually cannot expel sputum on their own. If sputum and sputum accumulate in the respiratory tract, it will directly affect the smoothness and effective ventilation of the respiratory tract, resulting in shortness of breath, decreased blood oxygen concentration, and severe respiratory failure and atelectasis. At the same time, sputum is also a breeding ground for bacteria, which may cause respiratory system infections in patients and aggravate the condition. Therefore, timely and effective sputum removal is very necessary, and regular sputum suction has become one of the core tasks of clinical care for ventilator patients. The conventi...

AI Technical Summary

Problems solved by technology

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

[0006] 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

[0007] 3. The implementation of coughing up sputum can only be carried out by doctors according to the stage. The system cannot complete the whole process automatically and cannot meet the clinical needs

Whether or not to cough up sputum must be determined by the subjective human judgment of doctors or nurses, which cannot achieve true automation and better meet clinical needs

[0008] 4. There is no feasible solution for the expectoration of PEEP patients

When such patients need to clear the airway sputum, if the ventilator is removed and the routine suction tube operation is performed, it means that the oxygenation of the patient is interrupted or weakened for a period of time, and the patient's alveoli are directly exposed to a pressure lower than the PEEP value In the atmosphere, it is obviously very harmful to the patient

The expectoration method described in patent WO2007054829 and patent CN 201510657436.2 does not explain how to expectorate PEEP patients, but as far as those skilled in the art understand this method, it is possible to shorten the expectoration time and end expectoration in advance to ensure that PEEP patients need positive end-cough pressure (PECP), but this method only uses time to control PECP, no closed-loop feedback, no direct pressure monitoring, and no actual pressure control. It is obviously impossible to accurately control PECP, so it may cause harm to the patient

[0010] 5. The pipeline connection is complicated, the space occupied is large, the cost is high, and there are many fault points and leakage points

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