Laryngeal mask and method for attaching laryngeal mask

Abstract

To provide a nasal laryngeal mask and a method for attaching the laryngeal mask.SOLUTION: A laryngeal mask has: a first tube having a first end; a second tube having a second end; an annular cuff having a third end, communicating with the third end, and configured to be tightly adhered with a tissue surrounding an opening of a subject's trachea; and a branch connection part having a first connection port configured to be connectable to the first end, a second connection port configured to be connectable to the second end, and a third connection port configured to be connectable to the third end.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a laryngeal mask, which is a medical device for securing the airway during general anesthesia or in emergency rescue, and a method for wearing the laryngeal mask.

Background Art

[0002] As a medical device for blocking the communication between the esophagus and the trachea of a subject and securing the airway, a laryngeal mask is known. Generally, the laryngeal mask includes a tube member that is inserted into the subject through the oral cavity and arranged to communicate with the trachea, and an annular cuff that is provided at the tip of the tube member and is arranged in close contact with the surrounding tissue of the opening of the trachea by being inflated in a state of being inserted from the oral cavity to a preset insertion position (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the conventional laryngeal mask has problems that the operation in the oral cavity and on the teeth is difficult because the tube member extends out of the oral cavity. In addition, there are problems such as the tube being blocked or the teeth chipping due to strongly biting the tube member during anesthesia or during anesthesia awakening.

[0005] Therefore, an object of the present invention is to provide a nasal laryngeal mask and a method for wearing the laryngeal mask.

Means for Solving the Problems

[0006] To achieve the above object, the laryngeal mask of the present invention is A first tube having a first end, a second tube having a second end, an annular cuff having a third end, communicating with the third end, and configured to be capable of adhering to the tissue around the opening of the trachea of the subject, a branch connection portion having a first connection port configured to be connectable to the first end, a second connection port configured to be connectable to the second end, and a third connection port configured to be connectable to the third end, and having. [Effect of the Invention]

[0007] According to an embodiment of the present invention, a nasal laryngeal mask and a method of wearing the laryngeal mask can be provided. [Brief Description of the Drawings]

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

[0009] Hereinafter, a laryngeal mask according to an embodiment of the present invention will be described with reference to the drawings.

[0010] (Overall Configuration) FIG. 1 shows a schematic perspective view of the laryngeal mask according to the present embodiment.

[0011] As shown in FIG. 1, the laryngeal mask 100 according to this embodiment includes a first tube 110, a second tube 120, an annular cuff 130, a branch connection portion 140, and the like. Each component will be described in detail. In this embodiment, as an example, the case where the first tube 110 and the second tube 120 are respectively passed from the first nostril and the second nostril of the subject into the nasal cavity will be described, but the present invention is not limited in this regard. For example, for a subject with only one nostril open due to nasal septum deviation or the like, only the first tube 110 may be passed from one nostril of the subject into the nasal cavity, and the second tube may be passed into the oral cavity of the subject.

[0012] As described above, the first tube 110 is a tube that is disposed in the oral cavity through the nasal cavity from one nostril of the subject. The first end portion 112 disposed inside the oral cavity of the first tube 110 is connected to the first connection port 142 of the branch connection portion 140 described later.

[0013] Similarly to the first tube 110, the second tube 120 is a tube that is disposed in the oral cavity through the nasal cavity from the other nostril of the subject. The second end portion 122 disposed inside the oral cavity of the second tube 120 is connected to the second connection port 144 of the branch connection portion 140 described later.

[0014] The first tube 110 and the second tube 120 are preferably made of a flexible material such as medical soft vinyl chloride resin so as not to damage the nasal cavity and oral cavity of the subject, although not limited thereto.

[0015] When passing a medical tube through the nasal cavity, inserting a tube as thin as possible for the size of the subject's nasal cavity can reduce the occurrence of nosebleeds and mucosal damage. In particular, nosebleeds during surgery are difficult to stop and pose a life-threatening risk, and special attention is required. From the above perspective, the diameter (inner diameter) of the first tube 110 and the second tube 120 is preferably about 2.5 mm to 5.0 mm, and more preferably 4 mm to 4.5 mm. Although it depends on the user's physique, age, gender, etc., the tube diameter of a conventional tracheal tube used for general nasotracheal intubation for adults is usually about 6 to 7 mm in inner diameter. In the laryngeal mask according to the present embodiment, since oxygen and gas exchange necessary for the human body are performed via two tubes transnasally, the diameters of the first tube 110 and the second tube 120 can be made smaller compared to the nasotracheal intubation tube. For example, by setting it to 4 mm to 4.5 mm, it can be preferably used for subjects of all physiques and ages, but it is considered that even smaller tube diameters can be applied depending on the surgery and physique. In any case, since the tube diameter can be made smaller compared to the conventional nasotracheal intubation tube, the risk of nosebleeds and mucosal damage during the treatment of the subject can be reduced.

[0016] The annular cuff 130 is arranged at a preset insertion position from the subject's oral cavity, adheres to the surrounding tissue of the opening of the subject's trachea, and plays a role in blocking the communication between the subject's esophagus and trachea.

[0017] The annular cuff 130 is integrally provided with a cuff-shaped member 132 formed entirely in an annular shape (i.e., endless) and a conduit 134 communicating with the internal space surrounded by the cuff-shaped member 132. Note that the cuff-shaped member 132 may be configured to be able to expand or contract by gas being supplied to the inside or discharged from the inside by a gas supply device (not shown).

[0018] The annular cuff 130 can be formed from materials such as medical soft vinyl chloride resin and medical silicone rubber.

[0019] The conduit 134 communicates with the internal space surrounded by the cuff-shaped member 132 of the annular cuff 130 and has a third end 136. Note that the length of the conduit 134 is not particularly limited, and it is not particularly limited as long as the annular cuff can be placed at a predetermined position of the subject.

[0020] The branch connection portion 140 has a substantially Y-shaped cross-sectional view, and has a first connection port 142 and a second connection port 144 on the upper end side (oral cavity side), and a third connection port 146 on the lower end side (trachea side).

[0021] The first connection port 142 is detachably connected to the first end 112 of the first tube 110, the second connection port 144 is detachably connected to the second end 122 of the second tube 120, and the third connection port 146 is detachably connected to the third end 136.

[0022] In FIG. 1, the annular cuff 130 and the branch connection portion 140 are shown as separate members, but the annular cuff 130 and the branch connection portion 140 may be integrally formed. In this case, in terms of the configuration of the laryngeal mask, it has substantially the same configuration as the laryngeal mask 100 shown in FIG. 1 except that the third end 136 and the third connection port 146 are always connected. By integrally forming the annular cuff 130 and the branch connection portion 140, the size of the entire laryngeal mask 100 excluding the tube portions of the first tube 110 and the second tube 120 can be reduced, so that handling becomes easier and the laryngeal mask 100 can be placed deeper into the oral cavity.

[0023] When the laryngeal mask 100 according to the present embodiment configured as described above is used, the gas is introduced from the upstream side through the first tube (and the second tube), the branch connection portion 140, the conduit 134, and the internal space of the cuff-shaped member 132 into the trachea of the subject.

[0024] (An example of a method for wearing a laryngeal mask) Next, a method for wearing the laryngeal mask according to the present embodiment will be described with reference to the drawings. The method for wearing the laryngeal mask according to the present embodiment includes a first tube 110 having the first end portion 112 described above, a second tube 120 having the second end portion 122, and a third end portion 136. An annular cuff 130 that communicates with the third end portion 132 and is configured to be able to adhere to the surrounding tissue of the opening of the trachea of the subject, a first connection port 142 configured to be connectable to the first end portion 112, and a second connection port 144 configured to be connectable to the second end portion 122. And a method of wearing a laryngeal mask 100 having a branch connection portion 140 having a third connection port 146 configured to be connectable to the third end portion 136 to a subject.

[0025] FIG. 2 shows a flowchart of an example of a method for wearing a laryngeal mask according to an embodiment of the present invention. In the method for wearing the laryngeal mask shown in FIG. 2, a method for wearing a laryngeal mask in which tubes are passed through both nostrils of a subject will be described.

[0026] As shown in FIG. 2, the method for wearing the laryngeal mask according to the present embodiment includes a first step S200 of inserting the first tube from the first nostril of the subject and taking out the first end portion of the first tube outside the oral cavity of the subject; a second step S220 of inserting the second tube from the second nostril of the subject and taking out the second end portion of the first tube outside the oral cavity of the subject; a third step S240 of connecting the first end portion to the first connection port, connecting the second end portion to the second connection port, and connecting the third end portion to the third connection port; a fourth step S260 of disposing the annular cuff on the surrounding tissue of the opening of the trachea of the subject; a fifth step S280 of removing the bending of the first tube and the second tube by pulling the first tube and the second tube from the first nostril side and the second nasal cavity side, respectively; and has.

[0027] Each step will be described in more detail.

[0028] In the first step S200, the first tube 110 is inserted into the first nostril of the subject from the side of the first end 112, the first tube 110 is passed through the nasal cavity of the subject, and the first end 112 is brought out of the subject's oral cavity. As a result, the first tube 110 is arranged such that the first end 112 is located outside the oral cavity, the main body portion of the first tube passes through the subject's oral cavity and nasal cavity, and the other end is located outside the nostril.

[0029] In the second step S220, the second tube 120 is inserted into the second nostril of the subject from the side of the second end 122, the second tube 120 is passed through the nasal cavity of the subject, and the second end 122 is brought out of the subject's oral cavity. As a result, the second tube 120 is arranged such that the second end 122 is located outside the oral cavity, the main body portion of the second tube passes through the subject's oral cavity and nasal cavity, and the other end is located outside the nostril. Of course, either the first step or the second step may be carried out first, or they may be carried out simultaneously.

[0030] Briefly speaking, the third step S240 is a step of connecting the first tube 110, the second tube 120, and the annular cuff 130 to the branch connection portion 140. Specifically, the first end 112 of the first tube 110 brought out of the subject's oral cavity in the first step is connected to the first connection port 142, the second end 122 of the second tube 120 brought out of the subject's oral cavity in the second step is connected to the second connection port 144, and the third end 136 of the annular cuff 130 is connected to the third connection port 146. At this time, the connection order is not particularly limited.

[0031] The fourth step S260 is a step of arranging the annular cuff 130 on the surrounding tissue of the opening of the trachea of the subject, or in other words, a step of arranging it so as to cover the pharynx of the subject.

[0032] The fifth step S280 is a step of eliminating the bending of the first tube 110 and the second tube 120. Specifically, the first tube 110 and the second tube 120 are each pulled from the first nostril side and the second nasal cavity side, respectively, to eliminate the bending of each tube.

[0033] By the above steps, the attachment of the laryngeal mask according to the present embodiment is completed. After the attachment, a ventilator (not shown) or the like is connected from the other end side of the first tube and the second tube to perform assisted ventilation to secure the airway of the subject.

[0034] As described above, in the laryngeal mask according to the present embodiment, since the first tube and the second tube do not substantially pass through the oral cavity, the risk that the subject bites the tube and the tube is blocked is low.

[0035] In addition, in the laryngeal mask according to the present embodiment, since the first tube and the second tube do not substantially pass through the oral cavity, the treatment of the oral cavity and teeth of the subject is not hindered.

[0036] Furthermore, in the laryngeal mask according to the present embodiment, since ventilation is performed using the two tubes of the first tube and the second tube, the diameter of each tube can be reduced, and the risk of nosebleed and mucosal damage can be lowered. Also, since ventilation is performed using two tubes, the tubes are less likely to kink, and it is easy to ensure a sufficient ventilation volume.

[0037] (Another Example of the Method for Attaching a Laryngeal Mask) Another example of the method for attaching the laryngeal mask according to the present embodiment will be described below.

[0038] FIG. 3 shows a flowchart of an example of the method for attaching a laryngeal mask according to another embodiment of the present invention. In the method for attaching the laryngeal mask shown in FIG. 3, the laryngeal mask according to the present embodiment is attached to a subject who has only one nostril open due to a deviated nasal septum or the like.

[0039] As shown in FIG. 3, the method for wearing a laryngeal mask according to the present embodiment is as follows. A sixth step S300 of inserting the first tube through the first nostril of the subject and bringing out the first end of the first tube outside the subject's oral cavity; A seventh step S320 of connecting the first end to the first connection port, the second end to the second connection port, and the third end to the third connection port; An eighth step S340 of disposing the annular cuff on the tissue around the opening of the trachea of the subject; A ninth step S360 of removing the bend of the first tube by pulling the first tube from the first nostril side; It has.

[0040] Each step will be described in more detail.

[0041] The sixth step S300 is a step of inserting the first tube 110 from the first nostril of the subject from the first end 112 side, passing the first tube 110 through the subject's nasal cavity, and bringing out the first end 112 outside the subject's oral cavity. As a result, the first tube 110 is arranged such that the first end 112 is located outside the oral cavity, the main body portion of the first tube passes through the subject's oral cavity and nasal cavity, and the other end is located outside the nostril.

[0042] The seventh step S320 is a step of connecting the first tube 110, the second tube 120, and the annular cuff 130 to the branch connection portion 140. Specifically, the first end 112 of the first tube 110 brought out outside the subject's oral cavity in the sixth step is connected to the first connection port 142, the second end 122 of the second tube 120 is connected to the second connection port 144, and the third end 136 of the annular cuff 130 is connected to the third connection port 146. At this time, the connection order is not particularly limited.

[0043] The eighth step S340 is a step of disposing the annular cuff 130 on the tissue around the opening of the trachea of the subject, or in other words, a step of disposing it so as to cover the subject's pharynx.

[0044] The ninth step S360 is a step of eliminating the bending of the first tube 110. Specifically, by pulling the first tube 110 from the first nostril side, the bending of each tube is eliminated.

[0045] By the above steps, even for a subject with only one nostril open due to nasal septum deviation or the like, the wearing of the laryngeal mask according to the present embodiment can be completed, and the airway of the subject can be secured.

[0046] As described above, in the laryngeal mask according to the present embodiment, although the second tube passes through the oral cavity, since the tube diameter can be reduced, the influence on the oral cavity operation can be minimized. In addition, since the tube diameter of the second tube is small, a part of the oral cavity operation is also possible in the treatment of a subject wearing the laryngeal mask.

[0047] Furthermore, in the laryngeal mask according to the present embodiment, since the nasal tube is one of the first tubes, the risk of nosebleed and mucosal damage can be further reduced as compared with the case where the aforementioned first tube and second tube pass through the nose.

[0048] (Another embodiment of the method for wearing a laryngeal mask) Next, the method for wearing the laryngeal mask according to the present embodiment in the case where the annular cuff 130 and the branch connection portion 140 are integrally formed will be described with reference to the drawings.

[0049] FIG. 4 shows a flowchart of an example of the method for wearing a laryngeal mask according to another embodiment of the present invention. In the method for wearing a laryngeal mask shown in FIG. 4, a method for wearing a laryngeal mask by passing tubes through both nostrils of a subject will be described.

[0050] As shown in FIG. 4, the method for wearing the laryngeal mask according to the present embodiment is A 10th step S400 of inserting the first tube through the first nostril of the subject and bringing out the first end of the first tube outside the subject's oral cavity; An 11th step S420 of inserting the second tube through the second nostril of the subject and bringing out the second end of the first tube outside the subject's oral cavity; A 12th step S440 of connecting the first end to the first connection port and connecting the second end to the second connection port; A 13th step S460 of disposing the annular cuff on the tissue around the opening of the trachea of the subject; A 14th step S480 of pulling the first tube and the second tube from the first nostril side and the second nasal cavity side, respectively, to remove the bending of the first tube and the second tube; It has.

[0051] Each step will be described in more detail.

[0052] The 10th step S400 is a step of inserting the first tube 110 from the first nostril of the subject from the side of the first end 112, passing the first tube 110 through the subject's nasal cavity, and bringing out the first end 112 outside the subject's oral cavity. As a result, the first tube 110 is arranged such that the first end 112 is located outside the oral cavity, the main body portion of the first tube passes through the subject's oral cavity and nasal cavity, and the other end is located outside the nostril.

[0053] The 11th step S420 is a step of inserting the second tube 120 from the second nostril of the subject from the side of the second end 122, passing the second tube 120 through the subject's nasal cavity, and bringing out the second end 122 outside the subject's oral cavity. As a result, the second tube 120 is arranged such that the second end 122 is located outside the oral cavity, the main body portion of the second tube passes through the subject's oral cavity and nasal cavity, and the other end is located outside the nostril. Of course, either the first step or the second step may be carried out first, or they may be carried out simultaneously.

[0054] The 12th step S440 is a step of connecting the first tube 110 and the second tube 120 to the annular cuff 130. Specifically, the first end 112 of the first tube 110 that extends outside the subject's oral cavity in the first step is connected to the first connection port 142, and the second end 122 of the second tube 120 that extends outside the subject's oral cavity in the second step is connected to the second connection port 144. At this time, the connection order is not particularly limited.

[0055] The 13th step S460 is a step of disposing the annular cuff 130 on the surrounding tissue of the opening of the subject's trachea. In other words, it is a step of disposing it so as to cover the subject's pharynx.

[0056] The 14th step S480 is a step of eliminating the bending of the first tube 110 and the second tube 120. Specifically, the first tube 110 and the second tube 120 are each pulled from the first nostril side and the second nasal cavity side, respectively, to eliminate the bending of each tube.

[0057] By the above steps, the attachment of the laryngeal mask according to the present embodiment is completed. After attachment, a ventilator (not shown) or the like is connected from the other end side of the first tube and the second tube to perform assisted ventilation to secure the subject's airway.

[0058] As described above, in the laryngeal mask according to the present embodiment, since the first tube and the second tube do not substantially pass through the oral cavity, the risk that the subject bites the tube and the tube becomes blocked is low.

[0059] Also, in the laryngeal mask according to the present embodiment, since the first tube and the second tube do not substantially pass through the oral cavity, it does not interfere with the treatment of the subject's oral cavity and teeth.

[0060] Furthermore, since the laryngeal mask according to the present embodiment performs ventilation using two tubes, namely the first tube and the second tube, the diameter of each tube can be reduced, and the risk of nosebleeds and mucosal damage can be lowered. Also, since ventilation is performed using two tubes, the tubes are less likely to kink, and it is easy to ensure a sufficient ventilation volume.

[0061] (Other embodiments of the method of wearing a laryngeal mask) Another embodiment of the method of wearing a laryngeal mask in the case where the annular cuff 130 and the branch connection portion 140 are integrally formed will be described below.

[0062] FIG. 5 shows a flowchart of an example of the method of wearing a laryngeal mask according to another embodiment of the present invention. In the method of wearing a laryngeal mask shown in FIG. 5, the laryngeal mask according to the present embodiment is worn on a subject who has only one nostril open due to a deviated nasal septum or the like.

[0063] As shown in FIG. 5, the method of wearing a laryngeal mask according to the present embodiment includes a fifteenth step S500 of inserting the first tube through the first nostril of the subject and bringing the first end of the first tube out of the subject's oral cavity; a sixteenth step S520 of connecting the first end to the first connection port and connecting the second end to the second connection port; a seventeenth step S540 of placing the annular cuff on the tissue around the opening of the trachea of the subject; an eighteenth step S560 of removing the bend of the first tube by pulling the first tube from the first nostril side; and has.

[0064] Each step will be described in more detail.

[0065] The 15th step S500 is a step of inserting the first tube 110 from the first end 112 side into the first nostril of the subject, passing the first tube 110 through the nasal cavity of the subject, and taking out the first end 112 to the outside of the subject's oral cavity. Thereby, the first tube 110 is arranged such that the first end 112 is located outside the oral cavity, the main body portion of the first tube passes through the inside of the subject's oral cavity and nasal cavity, and the other end is located outside the nostril.

[0066] The 16th step S520 is a step of connecting the first tube 110 and the second tube 120 to the annular cuff 130. Specifically, the first end 112 of the first tube 110 taken out outside the subject's oral cavity is connected to the first connection port 142, and the second end 122 of the second tube 120 is connected to the second connection port 144. At this time, the connection order is not particularly limited.

[0067] The 17th step S540 is a step of arranging the annular cuff 130 on the surrounding tissue of the opening of the trachea of the subject, or in other words, a step of arranging it so as to cover the pharynx of the subject.

[0068] The 18th step S360 is a step of eliminating the bending of the first tube 110. Specifically, the bending of each tube is eliminated by pulling the first tube 110 from the first nostril side.

[0069] By the above steps, even for a subject with only one nostril open due to nasal septum deviation or the like, the wearing of the laryngeal mask according to this embodiment can be completed, and the airway of the subject can be secured.

[0070] As described above, in the laryngeal mask according to this embodiment, although the second tube passes through the oral cavity, the tube diameter can be reduced, so the influence on the oral cavity operation can be minimized. Also, since the tube diameter of the second tube is small, some oral cavity operations are also possible in the treatment of the subject wearing the laryngeal mask.

[0071] Furthermore, since the nasal tube of the laryngeal mask according to the present embodiment is a single first tube, the risk of nosebleeds and mucosal damage can be further reduced as compared with the case where the aforementioned first tube and second tube pass through the nose.

[0072] As described above, the embodiments of the present invention have been described with reference to the drawings. However, the specific configuration should be considered not to be limited to these embodiments. The scope of the present invention is indicated not only by the description of the above embodiments but also by the claims, and further includes all modifications within the meaning and scope equivalent to the claims.

Explanation of Reference Numerals

[0073] 100 Laryngeal mask 110 First tube 112 First end 120 Second tube 122 Second end 130 Annular cuff 132 Cuff-shaped member 134 Conduit 136 Third end 140 Branch connection part 142 First connection port 144 Second connection port 146 Third connection port

Claims

1. a first tube having a first end; a second tube having a second end; an annular cuff having a third end, communicating with the third end, and configured to be capable of adhering to the surrounding tissue of the opening of the trachea of the subject; a branch connection portion having a first connection port configured to be connectable to the first end, a second connection port configured to be connectable to the second end, and a third connection port configured to be connectable to the third end; A laryngeal mask having the above.

2. The annular cuff is configured to be capable of adhering to the surrounding tissue of the opening of the trachea by expanding in a state of being inserted from the oral cavity to a preset insertion position. The laryngeal mask according to Claim 1.

3. The inner diameters of the first tube and the second tube are in the range of 4 mm to 4.5 mm. The laryngeal mask according to Claim 1.

4. a first tube having a first end; a second tube having a second end; an annular cuff having a first connection port configured to be connectable to the first end and a second connection port configured to be connectable to the second end, communicating with the first connection port and the second connection port, and configured to be capable of adhering to the surrounding tissue of the opening of the trachea of the subject; A laryngeal mask having the above.

5. The annular cuff is configured to be capable of adhering to the surrounding tissue of the opening of the trachea by expanding in a state of being inserted from the oral cavity to a preset insertion position. The laryngeal mask according to Claim 4.

6. The inner diameters of the first tube and the second tube are in the range of 4 mm to 4.5 mm. The laryngeal mask according to Claim 4.

7. A method of wearing a laryngeal mask, which includes wearing a laryngeal mask having a first tube having a first end, a second tube having a second end, an annular cuff having a third end, communicating with the third end, and configured to be capable of adhering to the surrounding tissue of the opening of the trachea of the subject, a first connection port configured to be connectable to the first end, a second connection port configured to be connectable to the second end, and a third connection port configured to be connectable to the third end to the subject, and the method includes: a first step of inserting the first tube through the first nostril of the subject and bringing the first end of the first tube out of the oral cavity of the subject; A second step of inserting the second tube into the second nostril of the subject and taking out the second end of the first tube outside the subject's oral cavity; A third step of connecting the first end to the first connection port, connecting the second end to the second connection port, and connecting the third end to the third connection port; A fourth step of disposing the annular cuff on the tissue around the opening of the trachea of the subject; A fifth step of removing the bending of the first tube and the second tube by pulling the first tube and the second tube from the first nostril side and the second nasal cavity side, respectively; A method for wearing a laryngeal mask having the above steps.

8. A method for wearing a laryngeal mask on a subject, the laryngeal mask comprising a first tube having a first end, a second tube having a second end, a third end, an annular cuff configured to communicate with the third end and to be closely attached to the tissue around the opening of the trachea of the subject, a first connection port configured to be connectable to the first end, a second connection port configured to be connectable to the second end, and a branch connection portion having a third connection port configured to be connectable to the third end, the method comprising: A sixth step of inserting the first tube into the first nostril of the subject and taking out the first end of the first tube outside the subject's oral cavity; A seventh step of connecting the first end to the first connection port, connecting the second end to the second connection port, and connecting the third end to the third connection port; An eighth step of disposing the annular cuff on the tissue around the opening of the trachea of the subject; A ninth step of removing the bending of the first tube by pulling the first tube from the first nostril side; A method for wearing a laryngeal mask having the above steps.

9. A method for wearing a laryngeal mask, the laryngeal mask comprising a first tube having a first end, a second tube having a second end, a first connection port configured to be connectable to the first end, and a second connection port configured to be connectable to the second end, an annular cuff configured to communicate with the first connection port and the second connection port and to be closely attached to the tissue around the opening of the trachea of the subject, the method comprising: A tenth step of inserting the first tube into the first nostril of the subject and taking out the first end of the first tube outside the subject's oral cavity; A 11th step of inserting the second tube through the second nostril of the subject and taking out the second end of the first tube outside the subject's oral cavity; A 12th step of connecting the first end to the first connection port and connecting the second end to the second connection port; A 13th step of disposing the annular cuff on the tissue around the opening of the trachea of the subject; A 14th step of removing the bending of the first tube and the second tube by pulling the first tube and the second tube from the first nostril side and the second nasal cavity side, respectively; A method for wearing a laryngeal mask having the above steps.

10. A method for wearing a laryngeal mask, comprising: a first tube having a first end; a second tube having a second end; a first connection port configured to be connectable to the first end; and a second connection port configured to be connectable to the second end, the first connection port and the second connection port being in communication with each other, and an annular cuff configured to be in close contact with the tissue around the opening of the trachea of the subject, the method comprising: A 15th step of inserting the first tube through the first nostril of the subject and taking out the first end of the first tube outside the subject's oral cavity; A 16th step of connecting the first end to the first connection port and connecting the second end to the second connection port; A 17th step of disposing the annular cuff on the tissue around the opening of the trachea of the subject; A 18th step of removing the bending of the first tube by pulling the first tube from the first nostril side; A method for wearing a laryngeal mask having the above steps.

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