WO2015141738A1

WO2015141738A1 - Mask for medical use, and extensible sheet and frame to be used therein

Info

Publication number: WO2015141738A1
Application number: PCT/JP2015/058101
Authority: WO
Inventors: 桂史國本; 武田　裕
Original assignee: 公立大学法人名古屋市立大学; ヴォーパル・テクノロジーズ株式会社
Priority date: 2014-03-19
Filing date: 2015-03-18
Publication date: 2015-09-24
Also published as: JP2015192864A

Abstract

An improved mask for medical use, when put on a patient's face by pressing, said mask being capable of securing high airtightness within the mask and avoiding excessive stress concentration to the patient. The mask for medical use is provided with an extensible sheet (30) having extensibility and being disposed so as to cover the nose and mouth of a patient and a frame (10) having an edge part (11) in an outer circumferential part, wherein the frame (10) is designed so that the edge part (11) can press the extensible sheet (30) thus disposed to thereby closely adhere the extensible sheet (30) to the area around the nose and mouth in the patient's face.

Description

Medical mask, extension sheet and frame used therefor

This invention relates to an improvement of a medical mask.

Conventionally, in medical practice, medical masks are used in various applications such as masks, oxygen masks, anesthesia masks, etc. included in manual resuscitation equipment for emergency resuscitation. As an example of a medical mask used for such applications, Patent Literature 1 discloses a manual respirator for emergency resuscitation including a pump and a mask.
The mask disclosed in Patent Document 1 has high stretchability and low resilience at a portion of the mask that comes into contact with the patient for the purpose of enhancing the adhesion of the mask to the patient's face and enhancing the hermeticity of the mask. The point which provides a gel-like synthetic resin is indicated.

JP 2003-325629 A

The present inventors have intensively studied to make the mask airtight more reliable and to make the mask structure simpler. As a result, by covering the patient's mouth and nose with a single stretchable stretch sheet, pressing the frame around the patient's mouth and nose with a frame having an edge from above the stretch sheet, I was able to solve this problem.

The present invention has been made to solve the above-described problems, and the first aspect of the present invention is defined as follows. That is,
An extensible sheet that is arranged to cover the mouth and nose of the patient;
A frame having an edge portion on an outer peripheral portion, the frame capable of pressing the extension sheet at the edge portion so that the arranged extension sheet is in close contact with the patient's face around the mouth and nose of the patient; ,
A medical mask comprising:

According to the medical mask of the first aspect defined as described above, the extensible extension sheet is pressed at the edge portion of the frame, so that the extendable sheet adheres to the patient's face, and the airtightness of the mask is improved. . That is, the extension sheet is pressed at the edge portion of the frame so that the operator's frame pressing force is easily concentrated on the patient's face. On the other hand, the stretchability of the stretch sheet is used to moderately reduce the excessive stress concentration of the frame pressing force so that the patient's face is not damaged by the frame pressing force. For example, when such a highly airtight mask is used for oxygen therapy, oxygen leakage from between the face and the oxygen mask is suppressed, so that the amount of oxygen used for the therapy can be reduced. The required amount of oxygen can be accurately administered to the patient. Further, since the extension sheet and the frame are configured separately from each other, the mask does not require a holding structure for holding the extension sheet on the frame unlike the mask described in Patent Document 1. The structure can be simplified. Further, if the extension sheet and the frame are separate, only the extension sheet can be exchanged depending on the patient, which is hygienic. As described above, according to the medical mask of the present invention, since oxygen leakage from the mask is suppressed, it is effective in preventing the occurrence of secondary disasters such as ignition by leaked oxygen gas.

The second aspect of the present invention is defined as follows. That is,
In the medical mask, the frame includes a first bone facing portion and a second bone facing portion that respectively face both cheekbones, and a third bone facing portion that faces the chin bone.
When pressing the patient's face with the frame, the facial flesh is likely to move by the pressing force at the thick part of the facial flesh, and the frame may be easily displaced from the position intended by the practitioner. On the other hand, since the movement of the facial flesh at the time of pressing is small in the portion where the facial flesh is thin, the frame is hardly displaced. Therefore, the medical mask defined in the second aspect corresponds to both the cheekbones and chin bones of the face that are thin on the face and move little when pressed in order to reduce the positional deviation when the frame is pressed. The bone facing portion is provided on the frame so that the pressing force acts on the position mainly. Such a structure of the medical mask is particularly suitably used for the EC method, which is a conventional method of artificial respiration, which presses the mask against the patient's face and lifts it upward on the face. Similarly, it is also suitably used in a mask usage method in which the mask is pressed against the patient's face and pulled down to the lower face.

The third aspect of the present invention is defined as follows. That is,
In the medical mask, the frame has a first finger engaging portion that engages with the first finger of the practitioner and a second finger that engages with the second finger of the practitioner on an outer surface of the frame. 2 finger engaging portions.
In the medical mask of the third aspect defined in this way, the operator can engage the finger with the finger engaging portion when the operator presses and pulls up the frame. This makes it easier to apply a pressing force to the mask, which in turn improves the airtightness of the mask.

The fourth aspect of the present invention is defined as follows. That is,
In the medical mask, the first finger engaging portion is on a perpendicular bisector of the straight line connecting the first bone facing portion and the second bone facing portion, and the straight line and the vertical It is arranged on the side opposite to the side where the third bone facing portion is located with respect to the intersection with the bisector.
In the medical mask of the fourth aspect defined in this manner, when the practitioner raises the frame to the upper side of the patient's face or lowers the frame, the finger engaging portion is provided in the direction in which the force acts. The frame can be stably pressed against the patient's face during the lifting or lowering operation.

The fifth aspect of the present invention is defined as follows. That is,
The said medical mask WHEREIN: The said flame | frame is provided with the protruding item | line part for avoiding contact | abutting with the said patient's mouth and nose, and this flame | frame on the said perpendicular bisector.
In the medical mask according to the fifth aspect defined as described above, the frame includes the ridges in the portions corresponding to the mouth and nose of the patient, so that contact between the patient's face and the frame is avoided. Discomfort can be reduced.

The sixth aspect of the present invention is defined as follows. That is,
In the medical mask, in the plan view of the frame, out of the edge portions, from the first edge portion and the second bone facing portion that reach the third bone facing portion from the first bone facing portion. The second edge portion that reaches the third bone facing portion is located within a virtual triangle formed by connecting the first bone facing portion, the second bone facing portion, and the third bone facing portion. ,
In the side view of the frame, among the edge portions, the first edge portion is located above a first virtual straight line connecting the first bone facing portion and the third bone facing portion, The second edge portion is located above a second imaginary straight line connecting the second bone facing portion and the third bone facing portion.
In the medical mask according to the sixth aspect defined as described above, a frame is formed so as to follow a typical three-dimensional shape of the patient face in the supine state in consideration of mounting the mask on the patient face in the supine state. Therefore, while reducing the burden caused by the pressure on the patient, the adhesion between the patient's face and the frame can be further improved, and the airtightness in the mask can be improved.

The seventh aspect of the present invention is defined as follows. That is,
An extensible sheet having extensibility, which is disposed so as to cover the patient's mouth and nose, and has an opening at least in a portion facing the patient's mouth and / or nose;
A frame having an edge portion on an outer peripheral portion, the frame capable of pressing the extension sheet at the edge portion so that the arranged extension sheet is in close contact with the patient's face around the mouth and nose of the patient; ,
A medical mask comprising:
According to the medical mask of the seventh aspect defined in this way, in addition to the action described in the first aspect, a sheet can be provided at a low cost.

(A) is a diagram showing the positional relationship between the patient and the medical mask 1 when the medical mask 1 according to the embodiment of the present invention is mounted, and (B) is a diagram showing a state after the medical mask 1 is mounted. It is. It is a 6-face figure which shows the external appearance of the flame | frame 10 used for the medical mask 1 of embodiment of this invention. It is a figure which shows the use condition of the medical mask 1 of embodiment of this invention. It is a front view which shows the flame | frame 110 used for the medical mask of other embodiment of this invention. It is a front view which shows the extension sheet | seat 200 with the hole used for the medical mask of other embodiment of this invention. It is a front view which shows the other extension sheet | seat 300 with a hole.

(First embodiment)
Hereinafter, the medical mask 1 according to the first embodiment of the present invention will be described.
First, FIG. 1A shows the positional relationship between the patient and the medical mask 1 when the medical mask 1 is mounted, and FIG. 1B shows the state after the medical mask 1 is mounted. As shown in FIGS. 1A and 1B, the medical mask 1 includes a frame 10 and an extension sheet 30. In use, the stretch sheet 30 is covered so as to cover the patient's mouth and nose, and is pressed with the frame 10 from above, thereby exhibiting high airtightness in the medical mask 1.

2, (A) front view, (B) right side view, (C) left side view, (D) plan view, (E) bottom view, and (F) rear view of the frame 10 are shown.
The frame 10 has a shape that fits the patient's mouth and nose within the frame 10 when the frame 10 is placed on the patient's face. Moreover, the edge part 11 is provided in the outer peripheral part so that the extension sheet | seat 30 can be pressed around a patient's mouth and nose. As the edge portion 11 is thinner, the pressing force is concentrated on the extension sheet 30 when the frame is pressed, the extension sheet 30 and the patient's face are in close contact with each other, and the airtightness of the mask 1 is excellent. On the other hand, if the edge portion 11 is thin, the pressing force per unit area increases, and an excessive force is applied to the patient's face, which may cause internal bleeding or laceration. According to the study by the present inventors, the thickness of the edge portion 11 in contact with the extended sheet 30 is preferably 1 to 10 mm, more preferably 3 to 5 mm. The thickness of the edge portion 11 may be uniform in the outer peripheral portion of the frame 10 or may be changed as appropriate. The material constituting the frame 10 is preferably a hard material so that it can withstand the pressing force of the practitioner and can apply the pressing force of the practitioner to the extension sheet without waste. If it is such a material, a various material can be used according to the objective. For example, a metal or a resin composition having impact resistance or heat resistance may be used so that the shape can be maintained even during disasters such as earthquakes and fires. Examples of the metal include duralumin, and examples of the resin composition include a polycarbonate resin. Further, the frame may be made of a transparent material or an observation window may be formed on the frame so that the practitioner can observe the patient's mouth and nose. If the frame is made of a transparent material, an observation window is unnecessary.

The frame 10 includes a first bone facing portion 12 and a second bone facing portion 13 at positions facing both cheekbones, and a third bone facing portion 14 at a position facing the chin bone. These bone facing portions are provided by causing the frame 10 to bulge outward in plan view. When pressing the patient's face with the frame 10, these bone facing portions can capture both cheekbones and chin bones, respectively, so that the positional deviation of the frame 10 can be suppressed.
In the medical mask 1 of the present embodiment, the first bone facing portion 12 and the second bone facing portion 13 include a first bone facing point 120 and a second bone facing point 130, respectively. These bone facing points are provided by projecting the first facing portion 12 and the second facing portion 13 to the face side in a side view. Further, the third bone facing portion 14 includes a third bone facing point 140 provided by projecting so as to hold the chin tip. The

bone facing points

120, 130, and 140 provided in this way can capture the lower part of the cheekbone and the chin bone when the frame 10 is pressed and pulled up, thereby avoiding the displacement of the medical mask 1. can do.

The frame 10 has a first finger engaging portion 15 that engages with the first finger of the practitioner and a second finger engaging portion that engages with the second finger of the practitioner on the outer surface of the frame 10. 16. For example, in the EC method, the practitioner engages the thumb with the first finger engagement portion 15, engages the index finger with the second finger engagement portion 16, presses the frame 10, and lifts it up. The frame 10 can be stably adhered to the patient's face. Here, the position and shape of the first finger engaging portion 15 is particularly limited if the first finger engaging portion 15 is provided so as to prevent the operator's finger from sliding on the frame 10 when the operator presses and lifts the frame 10. It is not limited. As a preferred example, in the medical mask 1, it is on a vertical bisector of a straight line connecting the first bone facing portion 12 and the second bone facing portion 13, and an intersection of this straight line and the vertical bisector. As a reference, a convex portion as the first finger engaging portion 15 is arranged on the side opposite to the side where the third bone facing portion 14 is located. The first finger engaging portion 15 may be provided as a concave portion as well as a convex portion. In the medical mask 1, the second finger engaging portion 16 is on the vertical bisector, and is a position where the index finger can be engaged when the first finger engaging portion 15 is engaged with the thumb. Is provided as an inclined portion. As another example, the second finger engaging portion 16 may be provided as a convex portion or a concave portion.

The frame 10 includes a ridge portion 17 on the vertical bisector. The shape of the ridge 17 is not particularly limited as long as it is formed to avoid contact between the patient's mouth and nose and the frame 10. The ridges 17 may be formed on the entire vertical bisector, or may be partially formed at positions corresponding to the patient's mouth and nose.
The frame 10 is preferably formed in a shape that can fit a general human face in a plan view and a side view. For example, as a plan view shape, the first edge portion 19 from the first bone facing point 120 to the third bone facing point 140 and the second edge from the second bone facing point 130 to the third bone facing point 140 are used. The edge portion 20 is located along a virtual triangle formed by connecting the first bone opposing point 120, the second bone opposing point 130, and the third bone opposing point 140, or within the outer virtual triangle. Is preferred. In addition, as a side view shape, the first edge portion 19 and the second edge portion 20 include an imaginary straight line formed by connecting the first bone facing point 120 and the third bone facing point 140 and the second edge portion 140. It is preferable to be located above a virtual straight line formed by connecting the bone facing point 130 and the third bone facing point 140.
Further, like the frame 10,

openings

18 and 19 may be provided. During the treatment, the practitioner can visually check the state of the extension sheet placed on the patient's face through the opening, and thus can improve the safety of the treatment. Such an opening is preferably provided when the frame is formed of an opaque material such as duralumin.

The extension sheet 30 is a single extension sheet having extensibility in all directions, and is arranged so as to cover the mouth and nose of the patient. Furthermore, when the extension sheet 30 and the frame 10 are overlapped, the peripheral edge portion of the extension sheet 30 is located outside the edge portion 11 of the frame 10 in plan view.
When the edge portion 11 of the frame 10 is pressed against the patient's face via the extension sheet 30, the patient's face is inclined, so the edge portion 11 tends to be displaced along this inclination (this displacement is sometimes the patient's face). May cause tears and internal bleeding on the face). In other words, a force vector is produced along the face surface. When the extension sheet 30 has extensibility, most of the force vector along the face surface is absorbed by the extension sheet 30 extending. Thus, the burden on the patient's face is reduced.
At this time, the extension sheet 30 is preferably a continuous sheet. This is not only to ensure the airtightness of the extension sheet 30 but also to prevent the deviation. This is because if the extension sheet 30 itself is displaced, the force of the edge portion 11 may directly affect the patient's face. Since the patient's face has a distorted spherical shape, the entire periphery of the extension sheet 30 is pressed downward along the face by the edge portion 11 of the frame 10. Therefore, a force that is pressed downward by the edge portion 11 and a force that resists the edge portion 11 are also applied to the portion that the edge portion 11 abuts (the portion that is located on the extension sheet and the point target also has a downward force. And the extension sheet 30 itself is more reliably prevented from shifting, so that the force of the edge portion 11 is efficiently converted into the extension of the extension sheet 30.

In the case of a continuous stretch sheet 30, the shape is preferably a hemisphere along the face shape. At that time, the extension sheet 30 is preferably separated from the inner surface of the frame 10 preferably entirely. If it is in close contact with the inner surface of the frame 10, the stretchability of the stretch sheet 30 may be suppressed. Moreover, even if the extension sheet 30 is extended by the edge portion 11, the burden on the patient's nose, mouth and eyes is reduced by making the extension sheet 30 hemispherical along the shape of the face.
The material of the stretch sheet is not particularly limited as long as it has sufficient stretchability, and can be appropriately selected according to the use of the mask, but silicone gel or the like can be used.
The thickness of the extension sheet can also be appropriately selected depending on the use of the mask, the condition of the patient's face, etc., and is preferably 0.5 to 7 mm, for example.

FIG. 3 shows a use state of the medical mask 1 of the first embodiment. Thus, the practitioner presses the frame 10 via the extension sheet 30 arranged on the patient's face. At this time, the thumb is engaged with the first finger engaging portion 15 and the index finger is engaged with the second finger engaging portion 16, so that the finger is stabilized on the frame 10 and the pressing force is not wasted. Can act on the face.

(Second Embodiment)
FIG. 4 shows a frame 110 used for the medical mask of the second embodiment. 4, the same elements as those in FIGS. 1 and 2 are denoted by the same reference numerals, and the description thereof is partially omitted.
In the frame 110, for example, a tube support hole 101 for inserting an oxygen tube connected to an oxygen cylinder or the like is formed. The number of tube support holes 101 is not particularly limited, and may be one or two or more. The position where the tube support hole 101 is formed is arbitrary, and may be formed on the upper side of the frame 110 as shown in FIG. 4 or may be formed on the lower side of the frame 110. It is preferable that the tube support hole 101 has a structure in which the diameter of the support hole can be adjusted so as to be compatible with tubes having different outer diameters.
In the medical mask of the second embodiment, the extension sheet is provided with a through hole at a position corresponding to the tube support hole 101 provided in the frame 110. For example, an oxygen tube connected to an oxygen cylinder inserts an extension sheet through the tube support hole 101 and the through-hole, thereby feeding oxygen into a space formed between the patient's face and the extension sheet. be able to. At this time, it is preferable that the diameter of the through hole of the extension sheet is smaller than the outer diameter of the tube so that the tube is tightly fitted to the extension sheet. This is to ensure airtightness.

(Third embodiment)
As a third embodiment of the present invention, examples of stretched sheets with holes are shown in FIGS. In FIG. 5 and FIG. 6, the extension sheet is indicated by a bold line, while the mask 10 is indicated by an imaginary line.
In the extension sheet 200 shown in FIG. 5, a large hole is formed so that the mouth and nose of the patient can be exposed. In FIG. 5, the code | symbol 201 shows the inner periphery of the extension sheet | seat 200, and the code | symbol 203 shows an outer periphery. As described above, the inner peripheral edge 201 and the outer peripheral edge 203 of the extension sheet 200 shown in FIG. 5 are formed substantially parallel to the edge portion 11 of the frame 10.
Thus, when providing a large hole in the extension sheet, the inner peripheral edge 201 is fixed to the frame 10 and the other parts are free with respect to the frame 10 to prevent the extension sheet from shifting when pressed by the edge portion 11. .

FIG. 6 shows another example of the extension sheet 300 having holes. The hole formed in the extension sheet 300 is relatively small, and the patient's nose is exposed. In FIG. 6, reference numeral 301 indicates the inner peripheral edge of the extension sheet 300. The outer peripheral edge 303 is formed in parallel with the edge of the frame 10.

As mentioned above, although embodiment of this invention has been described, you may implement combining 2 or more embodiment among these. Alternatively, of these, one embodiment may be partially implemented. Further, among these, two or more embodiments may be partially combined.
The present invention is not limited to the description of the embodiment of the invention. Various modifications may be included in the present invention as long as those skilled in the art can easily conceive without departing from the description of the scope of claims.

DESCRIPTION OF SYMBOLS 1 Medical mask 10 110 Frame 11 19 20 Edge part 12 13 14 Bone opposing part 15 16 Finger engaging part 17 Projection part 18 Opening part 30,200,300 Extension sheet

Claims

An extensible sheet that is arranged to cover the mouth and nose of the patient;
A frame having an edge portion on an outer peripheral portion, the frame capable of pressing the extension sheet at the edge portion so that the arranged extension sheet is in close contact with the patient's face around the mouth and nose of the patient; ,
A medical mask comprising:
The frame includes a first bone facing portion and a second bone facing portion that respectively face both cheekbones, and a third bone facing portion that faces the chin bone.
The medical mask according to claim 1.
The frame has a first finger engaging portion that engages with the first finger of the practitioner and a second finger engaging portion that engages with the second finger of the practitioner on the outer surface of the frame With
The medical mask according to claim 1 or 2.
The first finger engaging portion is on a vertical bisector of a straight line connecting the first bone facing portion and the second bone facing portion, and the straight line and the vertical bisector Arranged on the opposite side to the side where the third bone facing portion is located with respect to the intersection point,
The medical mask according to claim 3.
The frame includes a ridge on the vertical bisector to avoid contact between the patient's mouth and nose and the frame.
The medical mask according to claim 4.
In the plan view of the frame, out of the edge portions, a first edge portion from the first bone facing portion to the third bone facing portion and a third bone facing portion from the second bone facing portion. The second edge portion leading to is located within a virtual triangle formed by connecting the first bone facing portion, the second bone facing portion, and the third bone facing portion,
In the side view of the frame, among the edge portions, the first edge portion is located above a first virtual straight line connecting the first bone facing portion and the third bone facing portion, The second edge portion is located above a second imaginary straight line connecting the second bone facing portion and the third bone facing portion;
The medical mask according to any one of claims 2 to 5.
An extensible sheet having extensibility, which is disposed so as to cover the patient's mouth and nose, and has an opening at least in a portion facing the patient's mouth and / or nose;
A frame having an edge portion on an outer peripheral portion, the frame capable of pressing the extension sheet at the edge portion so that the arranged extension sheet is in close contact with the patient's face around the mouth and nose of the patient; ,
A medical mask comprising:
An extension sheet for use in a medical mask together with a frame having an edge on the outer periphery,
The extension sheet is disposed so as to cover the periphery of the patient's mouth and nose, and an opening is provided at least in a portion of the extension sheet that faces the patient's mouth and / or nose.
Extension sheet for use in medical masks.
A frame for use in a medical mask together with an extension sheet arranged to cover the periphery of the patient's mouth and nose,
The frame is a frame having an edge portion on an outer peripheral portion thereof and capable of pressing the extension sheet with the edge portion so that the extension sheet is in close contact with the patient's face around the mouth and nose of the patient. ,
Frame for use in medical masks.