JP2013202185A - Nostril cannula - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nostril cannula capable of making it hard to visually confirm the mounting state of a nostril cannula by another person, capable of making it hard to bent the nostril cannula by the action of external force and capable of making it hard to intercept the flow of air by kink even at the time of bending of the nostril cannula.SOLUTION: A nostril cannula includes: a tubular body part formed of an elastically deformable material having light permeability and having an internal space; and a pair of nostril insertion parts protruded from the central part in the axial direction of the body part in a diametric direction and communicated with the internal space of the body part to be formed in a tubular shape. In the body part, each of the regions between the end part in the axial direction of the body part and the nostril insertion parts is constituted of a base part of which the surface on the side directed to the face is flat and an opposed part forming the internal space of the body part between the opposed part and the base part. A protruded part protruded to the internal space of the body part is provided to the inner wall surface of the opposed part.

Description

  The present invention relates to a nostril cannula.

  A nostril cannula is for supplying a gas such as oxygen from a patient's nostril, and various forms have been proposed. For example, Patent Document 1 proposes a nostril cannula in which a pair of tubular nostril insertion portions are attached to a central portion of a body portion formed in a hollow cylindrical shape so as to protrude radially outward. When using this nostril cannula, tubes are attached to both ends thereof. And after inserting a nostril insertion part in a patient's nostril, each nose cannula is prevented from shifting | deviating downward by extending each tube upwards and hooking on an ear | edge. The tube hooked on the ear is connected to, for example, an oxygen generator, and oxygen is supplied from the oxygen generator to the patient's nostril via the tube and the nostril cannula.

Utility Model Registration No. 3133934

  By the way, the nostril cannula as described above is generally formed of an elastically deformable resin material, but is hung from above by a tube when worn. For this reason, when wearing a nostril cannula, there is a problem that the patient feels embarrassed and there is a need for a nostril cannula that is inconspicuous from the viewpoint of QOL. Further, if the tube is pulled strongly at the time of wearing, the force also acts on the nostril cannula, and the main body may be bent. When the main body portion is bent in this manner, a so-called kink may occur in which the internal space of the main body portion is crushed. When the kink occurs, the flow of oxygen in the main body is blocked, and there is a possibility that oxygen cannot be supplied to the nostrils.

  Therefore, the present invention has been made to solve the above problems, it is difficult for others to visually recognize that the nostril cannula is worn, and it is difficult to bend due to external force acting, An object of the present invention is to provide a nostril cannula that can make it difficult to block the air flow caused by kinks even if it is bent.

  A nostril cannula according to the present invention is formed of a translucent elastically deformable material and has a tubular main body portion having an internal space, and projects radially from a central portion in the axial direction of the main body portion. A pair of nostril insertion portions formed in a tubular shape communicating with the internal space of the main body portion, wherein each region between the axial end portion of the main body portion and the nostril insertion portion faces the face. A base portion having a flat surface on the side and a facing portion that forms an internal space of the main body portion between the base portion, and an inner wall surface of the facing portion projects into the internal space of the main body portion Protruding portions are provided.

  According to this configuration, the region between the axial end of the main body and the nostril insertion portion is formed, and the inner surface of the main body is formed between the base having a flat surface facing the face and the base. And an opposing portion. Therefore, the nostril cannula can be easily fitted to the face by the flat surface of the base portion, and deviation can be prevented. And since it is formed with the material which can be elastically deformed which has translucency, and has the protrusion part which protrudes in the internal space of a main-body part in the inner wall surface of an opposing part, the following effect can be acquired. That is, since the refractive index of the light at the protruding portion changes as compared with other portions, the main body portion is blurred by this, and the diameter looks small as a whole. Therefore, it can be made more difficult to visually recognize that the nostril cannula is attached. In addition, when the main body is bent, the distance between the protruding portion and the inner wall surface facing the protruding portion is short. Therefore, when the main body is bent, external forces tend to concentrate on this portion, and the protruding portion is opposed. The inner wall to be in close contact. On the other hand, since the distance between the inner wall surfaces is long in the portion where the protruding portion is not provided, the force does not act sufficiently and does not adhere completely, so that a gap is easily formed. Therefore, even if the said area | region of a main-body part is bent by external force, it can make it difficult to interrupt | block the flow of air.

  In the said opposing part, the thickness of the location in which the protrusion part is formed can be made larger than another part. In this case, the rigidity of the protruding portion is increased, and even if an external force is applied, the protruding portion itself is suppressed from being crushed. Therefore, it is easy to maintain the distance between the protruding portion and the opposing inner wall surface with a small distance. Become. As a result, the above-described air flow can be made more difficult to block. Moreover, since the protrusion part is provided in the opposing part side which does not contact skin, it can prevent that a base part becomes hard and can improve the fit to skin.

  The position where the protruding portion is provided in the nostril cannula is not particularly limited. For example, the protruding portion can be disposed on the nostril insertion portion side in the facing portion. If it does in this way, the outline of the upper part of a main-body part can be made more blurred by the refraction | bending of the light in a protrusion part, and also visual recognition can be made difficult. In addition, the nostril cannula is used in a state of being suspended from above by tubes attached to both ends of the nostril, so it is often pulled from above. In addition, since the nose side of the main body portion has an irregular shape in the cross-sectional shape, the rigidity against upward deformation is increased. Therefore, even if pulled from above, it becomes difficult to bend, and the above-described air flow can be further prevented from being blocked.

  In the nostril cannula, the outer corner of the opposite portion where the protruding portion is formed can be cut out. If it does in this way, the refraction of further light will arise and the outline of a main-body part can be further blurred. Further, by cutting out the outer shape of the corner so as to exhibit a shape inclined in the front-rear direction of the nostril cannula, the nostril cannula is easily inclined to the face side due to the weight of the protruding portion. Can be fitted to the skin.

  In the nostril cannula, the main body portion can be configured to be bent in a substantially V shape at a central portion where the nostril insertion portion is formed. If it does in this way, a nostril cannula can incline to the face side and can make it fit with skin.

  According to the present invention, it is possible to make it difficult for others to visually recognize that the nostril cannula is worn, and it is difficult to bend even when an external force is applied, and even if it is bent, the flow of air due to the kink is blocked. Can be difficult.

It is a perspective view of the nostril cannula which concerns on one Embodiment of this invention. It is a front view of FIG. It is a top view of FIG. It is the sectional view on the AA line of FIG. FIG. 3 is a sectional view taken along line B-B in FIG. 2. It is a perspective view which shows the shaping | molding die of the nostril cannula which concerns on this embodiment. It is sectional drawing of the shaping | molding die of FIG. 7, and the resin material adhering to this. It is a figure which shows an example of the usage method of the nostril cannula of FIG. It is sectional drawing which shows the other example of the main-body part of a nostril cannula.

  Hereinafter, an embodiment of a nostril cannula according to the present invention will be described with reference to the drawings. 1 is a perspective view of a nostril cannula according to the present embodiment, FIG. 2 is a front view of FIG. 1, and FIG. 3 is a plan view of FIG. In the following description, the up and down direction in FIG. 2 is referred to as up and down, the left and right direction is referred to as left and right, and the up and down direction in FIG.

  As shown in FIGS. 1-3, this nostril cannula is equipped with the main-body part 1 formed in the tubular shape, and the tubular connection part 2 connected with the both ends and the branch tube 301 mentioned later is attached. The central portion X of the main body 1 is bent in a V shape so as to form an obtuse angle, and a pair of nostril insertion portions 3 are attached with the bent portion interposed therebetween. Each nostril insertion part 3 is formed in a tubular shape so as to be inserted into the nostril, and protrudes upward from the upper part of the main body part 1 in a state of communicating with the main body part 1. The main body 1, the connecting portion 2, and the nostril insertion portion 3 are integrally formed and are not particularly limited. For example, a soft synthetic resin material such as vinyl chloride resin, styrene-based elastomer, silicon rubber, or urethane is used. It is formed with. In particular, it is preferably formed of a light-transmitting (transparent or translucent) material.

  The connecting portion 2 is connected at an angle so as to incline upward from both ends of the main body portion 1. The opening at the upper end is formed to be horizontal and extends upward to substantially the same height as the upper end of the nostril insertion portion 3.

  Next, the main body 1 will be described in more detail with reference to FIGS. 4 and 5. 4 is a cross-sectional view taken along line AA in FIG. 3, and FIG. 5 is a cross-sectional view taken along line BB in FIG. As shown in FIG. 4, the cross section near the center of the main body 1 has a flat base 11 that is a part facing the face, and a U-shaped facing part that forms an internal space S between the base 11. The cross section is formed in a rectangular shape as a whole. In particular, the outer surface of the base 11 is a surface 111 facing the face, and is a flat surface.

  On the other hand, in the main body 1, the cross section of the end region 13 between the nostril insertion portion 3 and the connecting portion 2 is formed in an irregular shape as shown in FIG. 5. That is, the outer shape is substantially rectangular, but a thick rectangular protrusion 14 is formed in front of the upper end of the facing portion 12. Moreover, the small inclined surface 121 is formed in the corner | angular part of the opposing part 12 in which the protrusion part 14 is formed because the external shape is notched. The protrusion 14 formed in this manner covers a length of about 30 to 100%, preferably about 40 to 100%, more preferably about 50 to 100% of the axial length of the end region 13. Are formed to extend in the axial direction.

  Next, a method for manufacturing the nostril cannula configured as described above will be described with reference to FIGS. FIG. 6 is a perspective view illustrating a mold for a nostril cannula according to the present embodiment, and FIG. 7 is a cross-sectional view of the mold and a resin material attached to the mold. Here, a method for forming a nostril cannula by dipping will be described.

  First, the mold will be described. As shown in FIG. 6, the mold 100 has a shape corresponding to the inner space S of the nostril cannula described above. In other words, the mold main body 101 is bent at both ends so as to correspond to the main body 1 and the connecting portion 2, and the pair of protrusions 102 corresponds to the nostril insertion portion 3. The mold body 101 and the protrusion 102 are both solid. In the mold body 101, a concave portion 103 cut out in a rectangular shape is formed at a portion corresponding to the protruding portion 14. Further, the protrusion 102 is formed in a rod shape and is detachably attached to the mold body 101.

  Next, dipping molding is performed using the above mold. The dipping molding can be performed by a known method. First, the above-described resin material is dissolved in a solvent, and is made liquid by heating as necessary and stored in a container. And the said shaping | molding die 100 is immersed in the resin material of this container. Thereafter, when a predetermined time elapses, the mold 100 is pulled up, and the solvent is volatilized and solidified. At this time, as shown in FIG. 7, the resin material adheres along the outer surface of the mold 100 to form a film D. As shown in the figure, a film having a large thickness is formed at a portion where the recess 103 is formed, and this becomes the protrusion 14. At this time, a small inclined surface 121 is formed on the outer surface of the protrusion 14 due to so-called sink marks.

  Thus, when the formed film D is solidified, the protrusion 102 is removed from the mold 100, and subsequently, the mold body 101 is pulled out from the film D. At this time, since the molded film D has elasticity, it can be easily pulled out even if the mold body 101 has a bent shape. Thus, the nostril cannula is completed.

  When a nostril cannula is manufactured by dipping molding as described above, a thick film is formed in the recess 103, thereby increasing the thickness. Here, sink marks are generated in the thick portion, and the outer shape takes a corner portion and exhibits a shape inclined in the front-rear direction of the nostril cannula. If it becomes such a shape, the refraction | bending of the outstanding light will arise, the outline of a main-body part can be blurred, and visual recognition can be made difficult. Further, the nostril cannula is easily tilted from the nostril insertion portion side to the face side due to the weight of the protruding portion 14. As a result, the nostril cannula can be fitted to the skin. In particular, as shown in FIG. 3, by bending the main body 1 in a V shape so as to form an obtuse angle at the central portion X, the nostril cannula can be easily tilted to the face side. Therefore, the fit can be further improved.

  Next, the usage method of this nostril cannula is demonstrated, referring FIG. First, a connection tube kit 300 as shown in FIG. 8 is prepared. The connection tube kit 300 includes a pair of branch tubes 301 and a connection tube 302 that connects one end portions of the tubes 301. A connection tube 303 is attached to the connection tube 302 and communicates with both branch tubes 301. In addition, a stopper 304 is provided that bundles both the branch tubes 301 and is movable along the branch tubes 301. And each branch tube 301 of the connection tube kit 300 comprised in this way is attached to the both ends of a nostril cannula, ie, each connection part 2. FIG. Subsequently, each nostril insertion portion 3 is inserted into the patient's nostril, and a nostril cannula is mounted under the nose. Following this, each branch tube 301 is pulled up and hooked to the ear, and then the connecting tube 302 is placed under the chin. Then, the position of the stopper 304 is adjusted, and the branch tube 301 is fixed along the jaw. Thereafter, the connection tube 303 is connected to an oxygen supply device (not shown) to supply oxygen. The oxygen is supplied from the nostril into the patient's body through the connection tube 303, the branch tube 301, and the nostril cannula.

  As described above, according to the present embodiment, since the protruding portion 14 that protrudes into the internal space S of the main body 1 is provided on the inner wall surface of the facing portion 12, when the main body 1 is bent, The effect of can be obtained. That is, as shown in FIG. 5, since the distance t1 between the protruding portion 14 and the inner wall surface facing the protruding portion 14 is short, when the main body portion 1 is bent, the external force tends to concentrate on this portion, and the protruding portion 14 And the inner wall surface facing each other. On the other hand, in the portion where the protruding portion 14 is not provided, the distance t2 between the inner wall surfaces is long, so that the force hardly acts, it is difficult to be completely adhered, and a gap is easily formed. Therefore, even if the end region of the main body 1 is bent by an external force, it is possible to make it difficult to block the air flow.

  Further, since the thickness of the protruding portion 14 is larger than that of the other portions, and the protruding portion 14 is provided at the upper end portion of the facing portion 12, the rigidity against the upward pulling can be increased. In particular, in the nostril cannula, as described above, a force is often applied upward by being pulled by the branch tube 301, but it is particularly advantageous because it is difficult to bend against such an external force.

  Furthermore, when the branch tube 301 is pulled upward, in the conventional nostril cannula, the vicinity of the lower portion of the surface 111 facing the face of the main body portion 1 is the starting point, and the upper portion of the main body portion may rotate in a direction away from the face. . However, the nostril cannula of the present invention is flexible because the main body 1 is formed of a soft synthetic resin material, and is difficult to rotate because the protrusion 14 is thicker than the other parts.

  Moreover, since the nostril cannula is formed of a translucent (transparent or translucent) material, there is an advantage that it is difficult to visually recognize even if the patient wears it. In particular, since the projection 14 having a large thickness has a refractive index of light different from that of other portions, the outline of the main body 1 can be blurred by the projection 14 provided on the upper end side of the main body 1. it can. Thereby, the diameter of the main-body part 1 can be shown small, and a nostril cannula can be made harder to visually recognize. Furthermore, by forming the inclined surface 121 on the outer surface of the protruding portion 14, more reliable light refraction occurs and the contour can be further blurred. In particular, by disposing the projecting portion in the vicinity of the upper portion and / or the lower portion of the main body portion, the outline of the main body portion can be further blurred, and the visual recognition can be made more difficult.

  Further, when the inclined surface 121 is formed on the outer surface of the protruding portion 14 as described above, the thickness of the protruding portion 14 acts so that the main body portion 1 is inclined toward the face side of the patient. Thereby, the fitting feeling to the face of the main-body part 1 improves.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible unless it deviates from the meaning. For example, in the above embodiment, the connecting portions 2 are provided at both ends of the main body 1, but the branch tube 301 can be directly connected to the main body 1 without providing the connecting portions 2. Moreover, the connection part 2 does not need to extend upward to substantially the same height as the upper end of the nostril insertion part 3.

  Moreover, the cross-sectional shape of the protrusion part 14 is not specifically limited, For example, it can also comprise as shown in FIG. In FIG. 9A, the protruding portion 14 is provided at the center in the vertical direction of the facing portion 12. Moreover, in the example of FIG.9 (b), the thickness of the protrusion part 14 is not enlarged, but is made the same as another part. That is, the recess 15 corresponding to the protrusion 14 is formed on the outer surface of the main body 1. In the example shown in FIG. 9 (c), the inclined portion is made the protruding portion 14 by inclining the inner wall surface of the facing portion 12. Further, in the example of FIG. 9D, the facing portion 12 is formed in an arc shape, and the protruding portion 14 is provided thereon. Even if it is which form, as long as the protrusion part 14 is provided in the opposing part 12, as above-mentioned, light can be refracted and an outline can be blurred and it can become difficult to interrupt | block the flow of air.

  Moreover, although such a protrusion part 14 can also be provided in the base part 11 on the opposite side to the opposing part 12, since the base part 11 will become hard if the protrusion part 14 with large thickness is provided in the base part 11 side, it will be on the face. From the viewpoint of the fit, it is preferable to provide it on the facing portion 12 side.

  Moreover, in the said embodiment, although dipping molding was demonstrated as a manufacturing method of a nostril cannula, methods other than this can also be utilized, for example, can also be manufactured by injection molding.

DESCRIPTION OF SYMBOLS 1 Main body part 11 Base part 12 Opposing part 14 Protrusion part 3 Nostril insertion part

Claims (5)

A tubular main body portion formed of an elastically deformable material having translucency and having an internal space;
A pair of nostril insertion portions that protrude in the radial direction from the central portion in the axial direction of the main body portion and are formed in a tubular shape communicating with the internal space of the main body portion,
With
In the main body, each region between the axial end of the main body and the nostril insertion portion is:
A base having a flat surface on the side facing the face;
And an opposing part that forms an internal space of the main body part between the base part and the base part,
On the inner wall surface of the facing portion, a protruding portion that protrudes into the internal space of the main body portion is provided.
Nostril cannula.   The nostril cannula according to claim 1, wherein a thickness of a portion where the protruding portion is formed in the facing portion is larger than that of other portions.   The nostril cannula according to claim 1 or 2, wherein the protruding portion is disposed on the nostril insertion portion side in the facing portion.   The nostril cannula according to any one of claims 1 to 3, wherein an outer shape of a corner portion of the facing portion where the protruding portion is formed is cut out.   The nostril cannula according to any one of claims 1 to 4, wherein the main body portion is bent in a substantially V shape at a central portion of the nostril insertion portion.

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