JPH11397A - Respiratory nose mask - Google Patents

Abstract

(57) [Summary] [Problem] To provide a mask capable of suppressing gas leakage due to displacement of a mask mounting position due to turning over during sleep without strongly tightening a mask fixing belt. A respiratory nose mask for supplying a positive pressure gas to a user's nose by contacting the mask with a bellows-like elastic body between a face of the mask and a frame on which the mask is mounted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a nasal respirator. More specifically, CPAP (Continuous Positive Airway Pressure) therapy suitable for treatment of sleep apnea syndrome, NIPPV (Nasal Intermittenttent) suitable for ventilation failure
The present invention relates to a respiratory nasal mask used for positive pressure ventilation (therapy) and the like.

[0002]

BACKGROUND OF THE INVENTION for the treatment of patients with sleep apnea syndrome, Keihanashiki continuous positive pressure breathing (CPAP) is performed, a constant yang 4~20cmH approximately ₂ O nostrils of a user during sleep A respiratory assist device supplied with pressurized gas is employed. In addition, in order to treat patients with ventilatory insufficiency, intermittent positive intermittent positive pressure ventilation (NIPPV) is performed, and intermittent positive pressure gas of about 4 to 24 cmH ₂ O is injected into the nostrils of the user, such as during sleep. A supplied respiratory assist device is employed.

[0003] Originally, various nasal masks for respiration and nasal-mouth masks have been developed for applying a positive pressure to the nostrils when using this device.

For example, US Pat. No. 5,243,971 discloses, as a nasal mask for a CPAP device, a mask having a thin film swelled by positive pressure, which is fitted to the nose when used to fit the mask. Further, Japanese Patent Application Laid-Open No. 9-10311 discloses a mask means for treating sleep apnea syndrome, for the purpose of preventing discomfort of a patient, reducing the weight, etc.
A mask for covering between the upper lip is disclosed.

[0005] In the conventional nasal mask, the mask mounting position is apt to be displaced due to body movements such as turning over, and when positive pressure gas is supplied, gas leaks from the interface between the nasal mask and the face, and the eye drops. In some cases, discomfort is given to the user, such as irritation to the part or chills due to air leaks, and in some cases, treatment must be discontinued. Gas leaks are prominent at the root of the nose and wings of the nose, etc.The only way to prevent gas leakage is to tighten the mask fixing belt more strongly regardless of the leak location. When doing so, it is pointed out that the mask may hurt the user's face.

[0006]

SUMMARY OF THE INVENTION According to the present invention, it is possible to prevent a mask mounting position from being shifted due to any body movement such as turning over during sleep without strongly tightening a mask fixing belt, thereby causing pain to a user. It is an object of the present invention to provide an improved mask that is comfortable and can be used for a long time without gas leakage.

[0007]

As a result of intensive studies on such a problem, it has been found that by providing a bellows-like elastic body between a respiratory mask and the mask frame, body movement of the user can be absorbed and gas leakage can be prevented. Is found. That is, the present invention relates to a respiratory nose mask that contacts a user's face and supplies a positive pressure gas to a user's nose. A respiratory nasal mask characterized by having a body is provided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a configuration when a respiratory nose mask of the present invention is worn. As preferred examples of the respiratory nose mask of the present invention, a nose mask 1, a frame 3 for attaching the nose mask, a frame 3 utilizing the shape of the head, and the like.
And a headgear 4 for fixing the positive pressure gas, and is used by being connected to a positive pressure gas generator by a hose 2 for supplying a positive pressure gas. Nose mask 1
Has an approximately isosceles triangle shape when viewed from the front of the user, and has an interface that comes into contact with the face around the nose except for the nostrils and the vicinity thereof, and the interface is made of thin silicon rubber or the like. .

As shown in FIG. 4, a conventional nasal respirator for respiration is attached to the head when the CPAP and NIPPV therapies are performed mainly during sleep, so that when the head turns left and right due to turning over, etc. Since a part of the headgear is in contact with the pillow or the bed, the relative movement between the headgear and the head occurs due to the frictional force, and as shown in FIG. 2, the balance between the forces applied to the left belt 5 and the right belt 6 is lost. The frame moves out of the proper position, moves and / or rotates, and the mask fixed to the frame also moves out of the original position. Further, due to the body movement, the force from the hose 2 is directly applied to the mask, and the mask may come off the original position in the same manner.

Originally, the center line A of the face and the center line B of the frame
And the face was in close contact with the mask, but the angle α
The misalignment creates a gap between the mask and the face, causing air leakage. As described above, the conventional nasal mask cannot avoid gas leakage caused by body movement.

In the respiratory nose mask of the present invention, even if the frame is misaligned, the misalignment of the mask itself or / and the face of the mask that is in close contact with the face is minimized by separating the face of the mask into close contact with the face of the mask. By disposing a bellows-like elastic body that can expand and contract in all directions between the frame and the frame to be attached, the displacement of the frame can be absorbed, and the displacement of the mask itself or / and the face of the mask that is in close contact with the face can be suppressed.

Further, the bellows-like elastic body is provided with appropriate elasticity, and the mask can be naturally and uniformly adhered to the face by the property of extending in all directions. Further, by providing a positive pressure gas to the mask, the bellows-like elastic body is stretched, so that the mask can be brought into close contact with the face without strongly tightening the belt.

Further, the object of the present invention can be solved regardless of the position of the bellows-like elastic body at any position between the face of the mask that is in close contact with the face and the frame on which the mask is mounted. Here, a method of placing a bellows-like elastic body between the frame and the mask shown in FIG. 1 will be described.

When this method is used, the peripheral shape of the bellows coincides with the peripheral shape of the mask to be connected, and the contour of the concave or sharp line of the bellows lies on a plane. As the material of the bellows-like elastic body, silicon rubber or the like, which is the material of the mask, is used, and if it is integrally molded with the mask, there are advantages of low manufacturing cost and easy mounting. The number of bellows pitches, pitch-to-pitch distances and thicknesses depend on the pressure of the positive pressure gas used, the size of the mask, the amount of deviation to be suppressed,
It can be determined by the deviation angle, the material used, and the like.

Since the frame misalignment angle (α) is usually within 10 °, the bellows-like elastic body can compress the height in a natural state where no load is applied to about half when mounted. preferable. The height of the bellows-like elastic body is 1
It is preferable that the pitch is 0 to 30 mm and the number of pitches is 2 to 10. The bellows preferably has a thickness of 1 to 3 mm.

By using the bellows-like elastic body within such a range, it is possible to provide a nasal mask which has good stability against displacement at the time of wearing and which can be worn without discomfort.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention is shown in FIGS. One of the bellows-like elastic members 7 was formed integrally with the mask, and the other was fixed to the frame. As the material of the bellows-like elastic body 7, silicone rubber which is easily used by a human body was used.
In a natural state where a load is not applied to the bellows-like elastic body, the height of the bellows-like elastic body 7 is designed to be 15 mm, the number of pitches of the bellows is equal to 3, and the interval is designed. Since most of the frame misalignment angle (α) is within 10 °, the bellows-like elastic body can be compressed to half its natural height when mounted. The thickness of the bellows is 1.
2 mm was taken.

[0018]

According to the nasal respirator of the present invention, displacement of the mask due to body movement can be suppressed, and gas leakage can be reduced to a minimum. Therefore, it is not necessary to tighten the fixing belt tightly, and it is possible to provide a comfortable and long-lasting nasal mask with reduced pain at the face contact portion. Of course, it can be easily inferred from the technical idea of the present invention that the present invention can be applied to various masks such as a nostril mask.

[Brief description of the drawings]

FIG. 1 is a schematic view of a preferred respiratory nasal mask of the present invention (as viewed from the side of the face).

FIG. 2 is a schematic view of a conventional respiratory nose mask (when viewed from under a face).

FIG. 3 is a schematic view of a preferred respiratory nasal mask of the present invention (when viewed from under the face).

FIG. 4 is a schematic view of a conventional nasal mask.

[Explanation of symbols]

 1. Nasal mask 2. Hose 3 Frame 4. Headgear 5. Left belt 6. Right belt 7. Bellows-like elastic body A. Center line of face B. Center line of frame

Claims (1)

[Claims] 1. A respiratory nasal mask for contacting a user's face and supplying a positive pressure gas to a user's nose, wherein a bellows-like elastic body is provided between a face of the mask and a frame on which the mask is mounted. A respiratory nasal mask, comprising: