CN204972618U - Medical respirator with point type expiratory valve looses - Google Patents

Abstract

The utility model relates to a medical face mask with scattered exhalation valves required for non-invasive positive pressure ventilation in the field of critical care medicine. The mask includes a main frame and a facial cushion, wherein the main frame plays a role of fixing and supporting the entire mask; the facial cushion is fixed on the inner edge of the main frame, and is used to fit the facial skin when worn on the patient's face; the mask also includes a A scattered-point exhalation valve, the scattered-point exhalation valve is a plurality of exhaust holes scattered in multiple areas on the main frame. A hollow joint is connected to the center of the outer side of the main frame for connecting the ventilator pipeline. The outer side of the main frame is provided with at least three headband attachment points for connecting with the headband to fix the mask on the face. The utility model can fully discharge the _CO2 in the exhaled air through the scattered-point exhalation valve integrated on the main frame of the mask, efficiently avoid _CO2 rebreathing, and improve the therapeutic effect of non-invasive positive pressure ventilation.

Description

Medical breathing mask with diffused exhalation valve

technical field

The utility model relates to a medical device related to critical care medicine, in particular to a medical breathing mask which provides an airflow path for non-invasive positive pressure ventilation and can reduce _CO2 rebreathing.

Background technique

Non-invasive positive pressure ventilation refers to a positive pressure-assisted ventilation technique implemented by connecting the patient to a non-invasive positive pressure ventilator through a mask. This technology can improve the patient's ventilation and oxygenation status, and is mainly used in patients with acute and chronic respiratory failure; it has been widely used in chronic obstructive pulmonary disease, cardiogenic pulmonary edema, immunosuppression, acute respiratory distress syndrome, etc. It has achieved remarkable clinical curative effect, and its implementation sites have also expanded from intensive care unit to general ward, emergency department, even community and family, and its clinical application is quite popular.

A mask refers to a type of device that connects the ventilator pipeline to the patient's face to provide an airflow path for non-invasive positive pressure ventilation. The mask is mainly composed of two main parts, the main frame and the facial cushion, which are fixed on the patient's face by the headband during non-invasive positive pressure ventilation. The main frame plays a role of bone support in the whole device structure. The facial cushion is fixed on the main frame, and mainly assumes the function of fitting the patient's facial skin.

The mask has a certain volume. When the patient exhales air, part of the gas will remain in the inner space of the mask. When the ventilator delivers air next time, this part of the residual gas may be inhaled into the lungs again. Exhaled air has a higher concentration of CO ₂ , and when the gas remaining in the mask is inhaled again, CO ₂ will also be inhaled again, a process called CO ₂ rebreathing. Rebreathing CO ₂ can easily lead to CO ₂ retention, which significantly affects the improvement of ventilation function, especially for patients with CO ₂ retention.

The exhalation valve refers to the valve used to expel exhaled gas, including _CO2 , to the atmosphere during noninvasive positive pressure ventilation. Most of the exhalation valves commonly used clinically are connected between the mask and the ventilator pipeline. The design of the valve is not easy to discharge the CO ₂ remaining inside the mask, and has low efficiency in improving CO ₂ rebreathing. In view of this, some people integrate the valve on the mask, but the valve position is only limited to a certain part of the mask, it is difficult to efficiently discharge the residual CO ₂ in the mask, and avoid CO ₂ rebreathing more thoroughly.

This shows that the above-mentioned existing exhalation valve and face mask obviously still have defects in structure, and need to be further improved urgently. In order to solve the above-mentioned existing problems, relevant manufacturers have tried their best to seek a solution, but no applicable improvement has been developed for a long time. Therefore how to create a breathing valve and a face mask with a novel structure is one of the current important research and development issues.

Contents of the invention

One purpose of the present utility model is to provide an improved medical breathing mask to solve the problem that current clinical face masks cannot effectively reduce _CO2 rebreathing.

The purpose of this utility model is achieved by adopting the following technical solutions.

The mask includes a main frame, a facial cushion and a hollow joint, wherein the main frame plays a role of fixing and supporting the entire mask; the facial cushion is fixed on the inner edge of the main frame, and is used to fit the facial skin when worn on the patient's face; The mask also includes a scattered-point exhalation valve, which is a plurality of exhaust holes scattered in multiple areas on the main frame.

The purpose of the utility model and the solution to its technical problems can also be further realized by adopting the following technical measures.

According to the mask of the present invention, a plurality of exhaust holes scattered in multiple areas on the main frame are radially distributed from the central area of the main frame to the surroundings. Optionally, the plurality of exhaust holes scattered in multiple areas on the main frame are divided into multiple groups, and each group includes more than two exhaust holes. Further, the exhaust holes are divided into three groups, which are respectively arranged on the upper part and both sides of the main frame corresponding to the nose area. The diameter of the vent hole is 0.01mm to 2mm, preferably 0.2-0.8mm. The setting of such a scattered-point exhalation valve is not only beneficial for the patient to exhale CO ₂ but also does not hinder the positive pressure maintained in the mask to ensure the existing ventilation effect.

According to the mask of the present utility model, the central part of the outer side of the main frame is connected with a hollow joint for connecting the pipeline of a ventilator. The ventilator is preferably a non-invasive positive pressure ventilator; It is connected with the headband to fix the mask on the face; the outer surface of the main frame is also provided with a through hole connected with the stomach tube, and the through hole has a cap.

When the patient exhales, the exhaled air fills the entire mask space. According to the mask with scattered exhalation valve proposed by the utility model, through the continuous air flow provided by the ventilator, the exhaled gas including _CO2 will be discharged by a plurality of exhaust holes scattered in multiple areas on the mask, Thus effectively reducing CO ₂ rebreathing.

By virtue of the above technical solutions, the utility model has at least the following beneficial effects:

1. The mask is simple and economical to make;

2. The mask is easy to use and can efficiently reduce _CO2 rebreathing without additional exhaust equipment;

3. The mask is widely applicable to various types of ventilators.

Description of drawings

Fig. 1 is a schematic diagram of a medical breathing mask in the prior art.

Fig. 2 is a schematic diagram of an embodiment of the medical breathing mask according to the present invention.

Fig. 3 is a schematic diagram of another embodiment of the medical breathing mask according to the present invention.

Explanation of reference signs:

1: Mask 4: Facial cushion

2: exhalation valve 5: headband attachment point

3: Main frame 6: Joint

detailed description

In order to further explain the technical means and effects that the utility model takes to achieve the intended purpose of the invention, below in conjunction with the accompanying drawings and preferred embodiments, the specific details of the medical breathing mask with scattered exhalation valve proposed according to the utility model are given below. Structure, characteristic and effect thereof are as follows in detail.

Fig. 1 has shown the medical breathing mask in the prior art, and this mask 1 comprises a breathing valve integrated on it, and the position of this breathing valve 2 is only limited to a zone on the mask, it is difficult to remove the residual CO in the mask ₂ Efficient discharge.

Fig. 2 shows an embodiment of the medical breathing mask according to the present invention. Face mask 1 comprises a main frame 3, a face cushion 4 and a hollow joint 6, and described main frame 3 plays the fixing, supporting effect of whole described mask; Described face cushion 4 is fixed on the inner edge of main frame, uses When worn on the patient's face, it fits closely to the facial skin; the mask 1 also includes a scattered point exhalation valve 2, which is a plurality of exhaust holes distributed in multiple areas on the main frame , the exhaust holes are radially distributed from the central area of the main frame to the surroundings. The number of vent holes is between 24-72, preferably 36-48. The diameter of the vent hole is 0.01 mm to 2 mm, preferably 0.2 mm to 0.8 mm. The center of the outer side of the main frame 3 is connected to a hollow joint 6, which is used to connect the pipeline of the ventilator. The ventilator is preferably a non-invasive positive pressure ventilator; The mask is fixed on the face; the outer surface of the main frame is also provided with a through hole connected with the gastric tube, and the through hole has a cap.

Fig. 3 shows another embodiment of the medical breathing mask according to the present invention. Compared with the breathing mask shown in Figure 2, the breathing mask shown in Figure 3 is different in that: the scattered exhalation valve 2 is three groups of exhaust holes scattered in three areas on the main frame; The group includes 8-16 exhaust holes, which are respectively arranged on the upper part and two sides corresponding to the nose area on the main frame.

In order to realize the purpose of the present utility model, the scattered-point exhalation valve provided here can also be a plurality of exhaust holes scattered irregularly in multiple regions on the main frame, a plurality of regular (such as circular arrangement, etc.) ) are scattered over multiple areas on the main frame.

The above descriptions are only preferred embodiments of the present utility model, and do not limit the utility model in any form. Although the utility model has been disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any skilled person familiar with this profession, without departing from the scope of the technical solution of the present utility model, can use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but all without departing from the technical solutions of the present utility model For the content of the scheme, any simple modification, equivalent change and modification to the above embodiments according to the technical essence of the present utility model still belong to the scope of the technical scheme of the present utility model.

Claims (10)

1. a medical breathing mask, the mask comprises a main frame and a facial cushion, the facial cushion is fixed on the inner edge of the main frame, fits the skin of the face when worn on the patient's face, and is characterized in that it also includes: A scattered exhalation valve, the scattered exhalation valve is a plurality of exhaust holes scattered in multiple areas on the main frame. 2. The mask according to claim 1, characterized in that, the plurality of exhaust holes scattered in multiple areas on the main frame are distributed radially from the central area of the main frame. 3 . The mask according to claim 1 , wherein the plurality of exhaust holes scattered on multiple areas of the main frame are divided into multiple groups, and each group includes more than two exhaust holes. 4 . 4. The mask according to claim 3, wherein the exhaust holes are divided into three groups, which are respectively arranged on the main frame corresponding to the upper part and both sides of the nose area. 5. The mask according to any one of claims 1-4, characterized in that, the diameter of the exhaust hole is 0.01-2mm. 6. The mask according to claim 5, characterized in that, the diameter of the exhaust hole is 0.2-0.8mm. 7. The mask according to any one of claims 1-4, wherein a hollow joint is connected to the center of the outer side of the main frame, and the joint is used to connect a pipeline of a ventilator. 8. The mask of claim 7, wherein the ventilator is a non-invasive positive pressure ventilator. 9. The mask according to any one of claims 1-4, wherein the outer surface of the main frame is provided with at least three headband attachment points, and the headband attachment points are connected with the headband to connect The mask is fixed on the face. 10. The face mask according to any one of claims 1-4, characterized in that, a through hole connected to the gastric tube is also provided on the outer surface of the main frame, and the through hole has a cap.