CN101559250B - Double-layer nose mask - Google Patents

Abstract

The invention discloses a double-layer nasal mask, which comprises an inner layer that can be attached to a patient's face to cover the nose and an outer layer arranged outside the inner layer, the inner layer has an air intake channel, and the An air chamber is formed between the inner layer and the nose, an exhaust passage is formed between the inner layer and the outer layer, the air chamber and the exhaust passage are connected by a one-way air valve, and the gas flows from the air The chamber communicates with the exhaust channel in one direction, and at least a portion of the inner layer is folded inwards to form inner folds that can be tightly attached to the patient's face for sealing. The sealing band formed by the inner folds and the patient's face significantly improves the sealing performance of the nasal mask, which can effectively prevent gas leakage, thereby avoiding the adverse effects of gas leakage on the patient and improving the curative effect.

Description

double layer nasal mask

technical field

The invention relates to a double-layer nasal mask for delivering medical gas to a patient.

Background technique

At present, in the medical industry, there are two types of nasal masks and mouth-nose masks used in conjunction with ventilators. Since the nasal masks do not need to cover the mouth, it is convenient for the patient to speak without making the face feel hot and humid, and it is beneficial for oxygen to directly enter the patient. Respiratory system and other advantages are gradually being widely used. Yet existing nasal mask mostly is single-layer structure, and the shortcoming of this structure is: 1, patient can only inhale with nose and exhale with mouth when breathing, and this brings certain inconvenience to patient; 2, clinically There is such a situation that when a dentist uses an analgesic ventilator to deliver anesthetic gas to a patient, the same respiratory nasal mask will be used repeatedly on many different patients. Therefore, there is a possibility of cross-infection between the patient and even the doctor. It stands to reason that all nasal masks given to patients should be disposable. However, due to the non-detachability of the single-layer structure, one-time use will greatly increase the cost of medical treatment. Later, the appearance of some double-layer nasal masks, such as the double-layer nasal mask disclosed in Chinese patent CN200720172765.9, only replaces the inner layer after one use, which solves these two problems to a certain extent, but , due to the lack of a well-designed gas discharge structure, during use of the existing double-layer nasal mask, the gas exhaled by the patient easily flows out from the gap around the nasal mask, causing the patient's cheeks and eyes to feel hot and humid, and affecting medical treatment Effect.

Contents of the invention

The main purpose of the present invention is to provide a double-layer nasal mask for the deficiencies of the prior art, which can overcome the above-mentioned shortcomings in the use of the existing nasal mask, make the patient breathe more smoothly and comfortably, and improve the comfort and safety of the treatment process. Improve healing.

To achieve the above object, the present invention adopts the following technical solutions:

A double-layer nasal mask, comprising an inner layer that can be attached to the patient's face to cover the nose and an outer layer that is arranged outside the inner layer, the inner layer has an air intake channel, and the inner layer and An air chamber is formed between the noses, an exhaust passage is formed between the inner layer and the outer layer, and the air chamber and the exhaust passage are connected by a one-way air valve, and the gas passes from the air chamber to the The exhaust channel flows in one direction, and the feature is that at least a part of the inner layer is folded inwards to form an inner fold that can be closely attached to the patient's face for sealing.

Preferably, the upper part of the inner layer forms a V-shaped depression matching the bridge of the nose, and the inner layer has folds of the inner layer that can fit the bridge of the nose at the V-shaped depression.

Preferably, at least a portion of the periphery of the outer layer connected to the inner layer is folded inward to form folds of the outer layer that are tightly attached to the inner layer for sealing.

Preferably, the inner layer is cup-shaped conforming to the shape of the nose.

Preferably, the one-way air valve includes a valve position and a valve body mounted on the valve position, and the periphery of the valve body warps outward under the action of air pressure during exhalation to supply air.

Preferably, the valve position is in the shape of a wheel, which includes a spoke, a hub on which a shaft is installed, and a plurality of equal fan-shaped openings formed by the spokes, and the valve body is a disc valve connected to the outer end of the shaft, The disc valve seals the fan-shaped opening in a natural state.

Preferably, protruding ribs are provided on the inner wall of the outer layer, and the ribs space the inner layer from the outer layer to form the exhaust channel.

Preferably, a pair of air intake pipes and a pair of air outlet pipes are symmetrically connected to the outer layer, the air intake pipes are connected to the air intake channels, the air outlet pipes are connected to the exhaust channels, and the air intake pipes are connected to the exhaust channels. The air passage includes a connecting pipe arranged on the inner layer, and the connecting pipe is tightly inserted into the air inlet on the outer layer for connecting the air inlet pipe.

Preferably, the outer diameter of the connecting pipe is slightly larger than the aperture of the air inlet into which it is inserted to achieve a tight fit.

Preferably, the air inlet pipe and/or the air outlet pipe are elastic corrugated pipes.

The beneficial technical effect of the present invention is:

The double-layer nasal mask of the present invention first has an inner layer and an outer layer double-layer structure. After wearing, the inner layer is in contact with the patient's face. The exhaust channels are unidirectional, so that the outer layer of the nasal mask and its accessories can be repeatedly sterilized by high temperature and reused many times, reducing medical costs and saving patients' expenses. On the other hand, according to the double-layer nasal mask of the present invention, at least a part of the periphery of the inner layer is folded inward to form inner folds that can be closely attached to the patient's face for sealing. The sealing tape significantly improves the sealing performance and can effectively prevent gas leakage, thereby avoiding discomfort caused by gas leakage to the patient.

According to a preferred embodiment, the upper part of the inner layer forms a V-shaped depression matching the bridge of the nose, and the inner layer has folds in the V-shaped depression that can fit the bridge of the nose. The inner layer is contoured to match the shape of the nose. This ergonomic structure is suitable for wearing, so that the user does not feel uncomfortable when wearing it, and the inner folds fit the patient's face to form a sealing band, and at the same time, there is also a space between the nasal mask and the patient's eyes , so as to ensure the safety of the eyes.

According to a preferred embodiment, at least a part of the periphery where the outer layer connects with the inner layer is folded inward to form folds of the outer layer that are tightly attached to the inner layer for sealing, which is more conducive to the inner layer and the outer layer tight fit. Even if anesthesia gas or exhaust gas leaks between the inner layer and the patient's face, these leaked gases will be discharged through the exhaust channel between the inner and outer layers (for example, sucked out by a vacuum source), so as to avoid gas leakage from the outer layer. patient discomfort. According to this structure, the inner and outer layers play the role of double-layer sealing protection.

Compared with traditional equipment, the use of the double-layer nasal mask of the present invention makes the patient's air in and out more smooth and comfortable, and the treatment is more effective and safe. For example, when the double-layer nasal mask of the present invention is used in the treatment of respiratory failure, the patient's long-term The survival rate has been significantly improved.

Description of drawings

Fig. 1 is the perspective view of the double-deck nasal mask of an embodiment of the present invention;

Fig. 2 is the sectional view of the outer layer of the double-layer nasal mask of an embodiment of the present invention;

Fig. 3 is a side sectional view of a double-layer nasal mask according to an embodiment of the present invention;

Figure 4 is a bottom sectional view of a double-layer nasal mask according to an embodiment of the present invention;

Fig. 5 is a front sectional view of a double-layer nasal mask according to an embodiment of the present invention.

The features and advantages of the present invention will be described in detail with reference to the accompanying drawings.

Detailed ways

Please refer to Figures 1 to 5, the double-layer nasal mask 10 includes an inner layer 11 and an outer layer 20 arranged outside the inner layer, the inner layer 11 adopts a cup shape that matches the shape of the nose, and can fit the patient's face after wearing , thereby forming an air chamber 15 between the inner layer 11 and the nose. The inner layer 11 has an air inlet channel for feeding medical gas. The outer layer 20 of the nasal mask is configured in a separable manner from the inner layer 11, and is spaced apart from the inner layer 11 to form an exhaust channel 22 capable of discharging the patient's exhaled gas. The air chamber 15 is connected to the exhaust passage 22 through a one-way air valve 46, so that exhaled gas flows in one direction from the air chamber to the exhaust passage. The inner layer 11 is preferably made of soft and highly elastic silicone, and the edge fits the patient's face to form a seal.

As shown in FIG. 1 , the contour of the inner layer 11 conforming to the shape of the nose is ergonomic, and the nasal mask can fit the patient's nose naturally when worn, so that the user does not feel uncomfortable when wearing it. There is a space between the nasal mask and the patient's eyes, so as to protect the safety of the eyes.

As shown in Figures 1, 3, and 4, the periphery of the inner layer 11 is folded inward to form an inner fold 11a. When the nasal mask 10 is worn on the patient's nose, the inner fold 11a will stick to the patient's face In this way, the inner layer folds 11a will form a good sealing band between the inner layer 11 and the patient's face, effectively preventing the gas from leaking out, thereby avoiding the discomfort caused by the gas leakage to the patient, and ensuring no harm to the human body. Eyes have adverse effects, but also improve the effect of treatment.

As shown in Figures 1 and 4, a V-shaped depression 12 is arranged on the top of the inner layer 11 to match the bridge of the patient's nose. The folded surface of the V-shaped recess 12 directly faces the air chamber 15, so that it can fit the bridge of the nose to form a tight sealing area. The V-shaped recess 12 further increases the distance between the nasal mask and the patient's eyes, thereby ensuring the safety of the patient when using the nasal mask.

As shown in FIGS. 1 to 5 , the outer layer 20 is matched with the inner layer 11 and assembled with a gap. The outer layer 20 is also preferably made of soft silicone. Protruding ribs 21 are preferably provided on the inner wall of the outer layer 20, so that a gap space, that is, an exhaust channel 22, is formed between the inner layer and the outer layer. Two left and right air intake pipes 30, 31 and two left and right air outlet pipes 32, 33 are symmetrically arranged on the outer layer 20 (with reference to human faces). These four silicone tubes are preferably designed in a wave shape and have good elasticity, so as to facilitate the connection of external hoses. As shown in Figure 4, the inner layer 11 has two connecting rubber hoses 16, 17, which are respectively inserted into the two air inlets 20a on the outer layer 20 to communicate with the two air inlet pipes 30, and the medical gas can pass through the connecting pipes. The rubber hose enters the air chamber 15 . The connecting rubber pipes 16, 17 on the inner layer can be seen by cutting the air inlet pipe 30. The outer diameter of the connecting rubber pipes is larger than the aperture of the air inlet it is inserted in, so as to achieve the purpose of sealing. The outer layer 20 is also provided with two exhaust ports 20b, 20d connected to the exhaust channel 22, and the exhaust ports 20b, 20d are respectively externally connected with two outlet pipes 31 for exhausting the exhaust gas in the exhaust channel. Exhaust can be achieved by directing the gas with a suitable vacuum source (not shown).

As shown in Figures 1, 3 and 5, the periphery of the opening of the outer layer 20 preferably has outer layer folds that are substantially similar to the peripheral folds 11a of the inner layer 11, which facilitates the tight fitting of the inner layer and the outer layer. In this way, even if anesthesia gas or waste gas leaks between the inner layer 11 and the patient's face, these leaked gases will be sucked (for example, by a vacuum source) into the exhaust passage 22 and then discharged by the exhaust pipe 31, thus To avoid gas leakage to cause discomfort to the patient. According to this structure, the inner and outer layers play the role of double protection.

As shown in Figures 3 to 5, a wheel-shaped valve position 40 is provided on the inner layer 11. The valve position 40 is provided with a hub hole 40a, a spoke 40b on which a shaft 40d is installed, and four equal fan-shaped openings 40c. On this valve position 40, a disc valve 45 is mounted on the outer end of the shaft 40d near the exhaust passage 22. The valve position 40 and the disc valve 45 cooperate to form the aforementioned one-way air valve 46 . The disc valve 45 is made of soft and elastic material such as silica gel, so that it can bend. The disc valve 45 acts as an interlayer between the valve position 40 and the outer layer 20, and will adhere to the bottom surface of the valve position 40 in a natural state, and its periphery can warp under pressure.

Normally, the disc valve relies on its hub 45a, which is tightly snapped together with the valve position 40, thereby blocking the fan-shaped opening 40b on the valve. In this state, the air chamber 15 and the exhaust passage 22 are blocked. When the patient inhales, the medical gas passes through the intake tube 30 of the outer layer 20, enters the connecting rubber tubes 16, 17 from the intake ports 20a, 20c, and is introduced into the air chamber 15. The disc valve 45 seals the valve position 40, blocking The communication between the gas chamber 15 and the exhaust passage 22 is provided to prevent the gas from leaking out. When the patient exhales, the periphery of the disc valve 45 warps radially under the effect of the relatively high pressure in the air chamber 15, and at this time the exhaust gas in the air chamber 15 will enter the exhaust passage 22 through the opened fan-shaped opening 40b, Relying on the suction effect of a suitable vacuum source (not shown), the waste gas is continuously discharged from the exhaust ports 20b, 20d through the exhaust pipe 31 .

According to the above-mentioned structure, the inner layer 11 and the one-way air valve 46 can be easily disassembled from the outer layer 20. After the nasal mask is used, the inner layer 11 and the one-way air valve 46 are convenient to replace with new ones. The high temperature sterilization is reused, and the outer layer 20 can be reused.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (9)

1. double-layer nasal mask, comprise and to be posted by the internal layer and the skin that is arranged at outside the described internal layer that patient covers nose on the face, described internal layer has inlet channel, form air chamber between described internal layer and the nose, form the exhaust passage between described internal layer and the skin, be connected by Non-return air valve between described air chamber and the described exhaust passage, gas from described air chamber to the one-way flow of described exhaust passage, described it is characterized in that, the inwardly turnover of at least a portion periphery of described internal layer, formation can be close to patient and turn over pleat with the internal layer that seals on the face, the inwardly turnover of at least a portion periphery that described skin and described internal layer join forms to be close on the described internal layer and turns over pleat with the skin that seals.

2. double-layer nasal mask as claimed in claim 1 is characterized in that, the V font depression that matches with the bridge of the nose is formed at the top of described internal layer, and described internal layer has and can turn over pleat with the described internal layer of bridge of the nose applying at described V word recess.

3. double-layer nasal mask as claimed in claim 1 is characterized in that, described internal layer for the nose shape match cup-shaped.

4. as each described double-layer nasal mask of claim 1 to 3, it is characterized in that described Non-return air valve comprises valve position and be installed in valve body on the described valve position, described valve body when exhaling under the gas pressure its periphery outwards warpage for giving vent to anger.

5. double-layer nasal mask as claimed in claim 4, it is characterized in that, described valve position is a colyliform, it comprises spoke, the wheel hub of axle and the fan-shaped opening of a plurality of equalizations that described spoke forms is installed, described valve body is the disc valve that is connected the outer end of described axle, and described disc valve is airtight described fan-shaped opening under naturalness.

6. as each described double-layer nasal mask of claim 1 to 3, it is characterized in that outer field inwall is provided with the rib of projection, described rib makes internal layer and described skin form described exhaust passage separately.

7. as each described double-layer nasal mask of claim 1 to 3, it is characterized in that, be connected to a pair of air inlet pipe and a pair of escape pipe on the described skin symmetrically, described air inlet pipe and described inlet channel join, described escape pipe and described exhaust passage join, described inlet channel comprises the connection tube that is arranged on the internal layer, and described connection tube closely inserts the air inlet that is used to connect described air inlet pipe on the described skin.

8. double-layer nasal mask as claimed in claim 7 is characterized in that, the external diameter of described connection tube than the aperture of the described air inlet that it inserted slightly greatly to realize tight fit.

9. double-layer nasal mask as claimed in claim 7, described air inlet pipe and/or described escape pipe are elastic wavy pipe.

Images