JP2017093905A - Tube instrument for being inserted into nasal cavity - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tube instrument for being inserted into a nasal cavity, which can easily secure an airway by establishing compatibility between the softness and rigidity of a tube.SOLUTION: A tube instrument 1 for being inserted into a nasal cavity comprises a tube 2 that is made of a hollow rubbery elastic body having a through-hole for connecting respective openings 6 and 7 at both ends. The tube 2 can be inserted into the nasal cavity. The tube instrument 1 for being inserted into the nasal cavity also comprises a rib protruding from an inner wall of the through-hole, midway in a length direction of the tube 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a nasal cavity insertion tube device for insertion into a nasal cavity.

  Snoring is a sleep symptom that many people have experienced, whether sporadic or chronic. Snoring that occurs sporadically when you are tired or drinking a lot has a relatively low risk of harming your health. However, if there is a companion who sleeps in the same room, snoring is preferably eliminated because it interferes with the sleep of the companion. On the other hand, chronic snoring is more serious than sporadic snoring because it interferes with the sleep of the accompanying person and has a risk of becoming sleep apnea syndrome. Sleep apnea syndrome is a disease in which an apnea state frequently occurs during sleep, and is likely to become hypertension during sleep, and is said to increase the risk of stroke and myocardial infarction. Sleep apnea syndrome also makes it difficult to get enough sleep even if it does not cause such a serious illness, so it becomes sleepy during the day and accidents occur when driving a car or motorcycle. Has the potential danger of causing.

  Sleep apnea syndrome is said to be caused by obstruction or obstruction of the airway during sleep due to the natural skeletal skeleton. It is well known that an obese person or wrestler who is prone to sleep apnea syndrome has a good-quality sleep using a medical device called CPAP. CPAP is composed of a mask and a compressor connected to the mask, and has a function of forcibly sending air from the compressor toward the mask during sleep and opening the upper airway of the user. However, since this medical device generally has a weight of 2 to 3 kg, it has a drawback that it is difficult to carry easily. Recently, groundbreaking snoring-free goods that eliminate these shortcomings have appeared. It is a tube-shaped product (referred to as “nasal cavity insertion tube device”) to be inserted into the nasal cavity (see, for example, Patent Document 1).

International Publication No. WO2014 / 163110

  FIG. 4 is a schematic diagram (4B) of a situation where a tube part constituting a conventional nasal cavity insertion tube device is inserted from the human nasal cavity to the airway shown in (4A) and (4A) of a human having a narrow airway. The schematic diagram (4C) of the situation where the tube is bent in the human nasal cavity shown in FIG. 4A) and the schematic diagram (4D) of the situation where the tube is compressed in the human nasal cavity shown in (4A) are respectively shown.

  Human snore with large snore or human apnea with sleep apnea syndrome often has a narrow airway behind the nasal cavity P (see the part indicated by the arrow 4A). In such a case, when the tube 32 is inserted into the nasal cavity P, it is easy to secure an airway, and snoring can be reduced or sleep apnea syndrome can be eliminated (see 4B). In order not to damage the inside of the nasal cavity P, the tube 32 is preferably made of a soft rubber-like elastic body.

  However, if the tube 32 is made of a soft rubber-like elastic body, the rigidity of the tube 32 is low, so that when the tube 32 is inserted into the nasal cavity P, the tube 32 is likely to be bent at an intermediate point 32a (see 4C). . Further, even if the tube 32 can be inserted into the nasal cavity P without being bent in the middle, the tube 32 may be crushed by being compressed at a site in the back of the nasal cavity P (see the site indicated by the arrow 4D) (4D See). As a result, the airway may not be secured and snoring may not be reduced or sleep apnea syndrome may not be resolved.

  FIG. 5 is a longitudinal sectional view (5A) of the conventional nasal cavity insertion tube device having the tube of FIG. 4 cut along the length direction and when cut along the XX line of (5A). XX sectional drawing (5B) is shown, respectively.

  The conventional nasal cavity insertion tube device 30 of FIG. 5 includes a tube 32 made of a rubber-like elastic body such as silicone rubber. The tube 32 has a hollow cylindrical shape and includes through holes 38 that are open on both ends. In addition, the tube 32 includes holes 35, 35 connected to the through hole 38 from the outside in the middle of the length direction. The hole 35 has a function of forming a bypass flow path between the outside air and the body, and a function of inhaling the air including the humid air in the nasal cavity P when the nasal cavity P is dried. The nasal cavity insertion tube device 30 includes a U-shaped bridge portion 41 made of resin or metal on the side opposite to the side to be inserted into the nasal cavity P. The bridge portion 41 is a portion that passes the human nasal septum, and the stopper at the tip thereof can be put in the other nasal cavity different from the nasal cavity into which the tube 32 is inserted.

  In order to increase the rigidity of the tube 32 of the conventional nasal cavity insertion tube device 30, the thickness of the tube 32 may be increased. However, the through-hole 38 becomes narrower in the length direction with respect to the thickness of the tube 32, that is, the outer diameter, and it goes against securing the airway. In addition, it is conceivable to secure the size of the through-hole 38 of the tube 32 and increase the outer diameter of the tube 32, but there is a risk that it is difficult to insert into the nasal cavity P or cannot be inserted.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a nasal cavity insertion tube device in which the softness and rigidity of the tube are compatible and an airway is easily secured.

  A nasal cavity insertion tube device according to an embodiment for achieving the above object includes a tube made of a hollow rubber-like elastic body having through holes connecting openings at both ends thereof, and the tube can be inserted into the nasal cavity. The nasal cavity insertion tube device includes a rib projecting from the inner wall of the through hole in the middle of the tube length direction.

  In the nasal cavity insertion tube device according to another embodiment, the rib may be one or more linear ribs extending linearly in the length direction of the through hole of the tube.

  In the nasal cavity insertion tube device according to another embodiment, the rib may be one or more frame-shaped ribs protruding in a frame shape along the inner wall of the through hole of the tube.

  In the nasal cavity insertion tube device according to another embodiment, the aforementioned rib may be one or more spiral ribs that spirally project along the inner wall of the through hole of the tube.

  In the nasal cavity insertion tube device according to another embodiment, the aforementioned rib may be formed in a region from the nasal cavity insertion side of the tube to a middle position of the length of the tube.

  ADVANTAGE OF THE INVENTION According to this invention, the nasal cavity insertion tube apparatus which aims at coexistence of the softness and rigidity of a tube and can ensure an airway easily can be provided.

FIG. 1 shows each perspective view of a nasal cavity insertion tube device according to a first embodiment of the present invention and a clip that is partially embedded and fixed thereto. 2 shows a longitudinal sectional view (2A) cut in the length direction of the nasal cavity insertion tube device of FIG. 1 and an AA sectional view (2B) cut along the AA line of (2A), respectively. . FIG. 3: is the longitudinal cross-sectional view cut | disconnected in the length direction of the nasal cavity insertion tube apparatus which concerns on 2nd embodiment of this invention, the expanded sectional view (3A) of the part B, and the modification of 2nd embodiment (3A) ) Is an enlarged cross-sectional view (3B) similar to FIG. FIG. 4 is a schematic diagram (4B) of a situation where a tube part constituting a conventional nasal cavity insertion tube device is inserted from the human nasal cavity to the airway shown in (4A) and (4A) of a human having a narrow airway. The schematic diagram (4C) of the situation where the tube is bent in the human nasal cavity shown in FIG. 4A) and the schematic diagram (4D) of the situation where the tube is compressed in the human nasal cavity shown in (4A) are respectively shown. FIG. 5 is a longitudinal sectional view (5A) of the conventional nasal cavity insertion tube device having the tube of FIG. 4 cut along the length direction and when cut along the XX line of (5A). XX sectional drawing (5B) is shown, respectively.

  Hereinafter, each embodiment of the nasal cavity insertion tube device according to the present invention will be described with reference to the drawings. Each embodiment described below does not limit the present invention, and all elements and combinations described in each embodiment are not necessarily essential to the solution of the present invention. .

"First embodiment"
FIG. 1 shows each perspective view of a nasal cavity insertion tube device according to a first embodiment of the present invention and a clip that is partially embedded and fixed thereto. 2 shows a longitudinal sectional view (2A) cut in the length direction of the nasal cavity insertion tube device of FIG. 1 and an AA sectional view (2B) cut along the AA line of (2A), respectively. .

A. Structure of Nasal Cavity Insertion Tube Device A nasal cavity insertion tube device 1 according to this embodiment includes a tube 2, a clip 3 fixed to one end thereof, and a stopper 4 fixed to the opposite side of the clip 3 to the tube 2. Prepare. Hereinafter, the clip 3, the stopper 4, and the tube 2 will be described in detail.

(1. clip)
The clip 3 is provided on one end of the nasal cavity insertion tube device 1 (the end opposite to the side to be inserted into the nasal cavity), and is preferably mainly made of resin (synthetic resin or natural resin). ). As a suitable resin constituting the clip 3, polycarbonate (PC), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyacetal resin (POM), polyether ether ketone (PEEK), or two or more polymers thereof An alloy can be illustrated. However, you may comprise the clip 3 from resin other than the said illustration. Further, the clip 3 may be configured by mixing a filler such as glass fiber, carbon fiber, or boron fiber in the resin. Further, the clip 3 may be made of a material other than a resin such as a metal. In that case, for the purpose of preventing rust, the clip 3 is covered with a resin or a rubber-like elastic body so as not to expose the metal to the outside. It is preferable to do this. In the present application, “mainly resin” means that the resin occupies a volume exceeding 50% by volume of the clip 3.

  The clip 3 is embedded in a thick portion on the opening 6 side of the tube 2 provided in the nasal cavity insertion tube device 1 and has a tubular shape or a shape lacking a part of the tubular shape, and a part of the buried tube 10. And a bridge portion 11 having a shape that extends from the outside toward the outside (the direction away from the embedded tube 10) and returns to the side of the embedded tube 10 (the side that does not cross the opening 6 of the tube 2). In this embodiment, the shape of the buried pipe 10 is preferably a substantially cylindrical shape, and has a plurality of protrusions 13 and 14 on the outer side surface and the inner side surface thereof. The buried pipe 10 is a pipe that is completely closed in a cross section parallel to the opening surface of the opening 6, but may have a shape lacking a part of a cylinder (for example, a C shape in a cross-sectional view). The buried tube 10 has a substantially circular outer periphery, and includes a plurality of protrusions 13 along the periphery thereof, and also has a substantially circular inner periphery, and includes a plurality of protrusions 14 along the periphery thereof. However, when the shape of the through hole 8 of the tube 2 is non-circular, the shape of the inner periphery of the buried tube 10 may be non-circular according to the shape of the through hole 8 of the tube 2. For example, when the shape of the through-hole 8 of the tube 2 is a square, the shape of the inner periphery of the buried pipe 10 can also be a square.

  The bridge portion 11 is a part of the clip 3 and is preferably made of a material constituting the clip 3. When the clip 3 is made of only resin, the bridge portion 11 can also be made of the same resin. However, the bridge portion 11 may be made of a material different from that of the clip 3. For example, the clip 3 may be mainly made of resin, and only the bridge portion 11 may be made of metal. The bridge portion 11 is an elongated member extending from one end (end portion on the opening 6 side) side of the buried pipe 10. In this embodiment, the bridge portion 11 has a U-shape. That is, the bridge portion 11 has a shape that extends to the outside of the embedded tube 10, curves in a U shape on the opposite side of the embedded tube 10, and returns to the side of the embedded tube 10. Since the bridge portion 11 extends from the embedded tube 10, forms a U-shaped curve and returns to the tube 2, the bridge portion 11 passes through the nasal septum separating the two nasal cavities, and the other nasal cavity The nasal cavity insertion tube device 1 can be used by inserting the stopper 4 into the nasal cavity. The bridge portion 11 is preferably provided with an enlarged diameter portion 12 that is thicker than the bridge portion 11 on the side opposite to the connection side with the buried pipe 10. This is to facilitate the formation of the stopper 4 around the enlarged diameter portion 12. However, the formation of the enlarged diameter portion 12 is not essential.

(2. Stopper)
The stopper 4 is preferably sized to enter the nasal cavity. The stopper 4 is preferably made of a material similar to a suitable material candidate that constitutes the tube 2. For example, when the tube 2 is made of silicone rubber, the stopper 4 can be made of silicone rubber.

(3. Tube)
The tube 2 is preferably composed of silicone rubber, urethane rubber, ethylene propylene rubber, butyl rubber, ethylene propylene diene rubber, nitrile rubber, ester-based, styrene-based, olefin-based, fluorine-based thermoplastic elastomer, or a composite thereof. The The tube 2 is made of a hollow rubber-like elastic body having through holes 8 that connect the openings 6 and 7 at both ends thereof. The outer shape of the tube 2 is preferably substantially cylindrical in a cross-sectional view cut along a plane parallel to the openings 6 and 7, but the outer shape is not limited to a complete circle in the cross-sectional view, It may be an ellipse or a polygon. However, when the cross section of the tube 2 (hereinafter simply referred to as “cross section” unless otherwise specified) is a polygon, the outer periphery of the tube 2 is in contact with the nasal cavity.

  Further, the cross-sectional shape of the through-hole 8 penetrating both ends of the tube 2 does not contact the nasal cavity unlike the outer shape of the tube 2 and may be any shape, and may be any shape such as a circle, an ellipse, or a triangle or a rectangle. It may be square. The outer diameter of the tube 2 from the opening 7 located on the nasal cavity insertion side to the vicinity of the opening 6 on the opposite side has a size that can be inserted into a human nasal cavity. The outer diameter can be appropriately designed according to the size of the human nasal cavity. A suitable size of the outer diameter is, for example, 4 to 7 mm. Further, the length of the portion of the tube 2 to be inserted into the nasal cavity is not particularly limited as long as the airway can be secured, and can be designed as appropriate according to the structure of the human nasal cavity. A suitable size of the length is, for example, 110 to 160 mm.

  The tube 2 preferably includes two through holes 5 that penetrate from the outer surface to the inner through hole 8. The number of through holes 5 is not limited to two, and may be one or three or more. The through hole 5 has a function of forming a bypass flow path between the outside air and the body when the opening 6 is blocked for some reason or the flow path of the air is narrowed. Moreover, since the inside of the nasal cavity may be dried only by the air sucked from the opening 6, the through-hole 5 also has a function of sucking in including the moist air in the nasal cavity.

  As shown in FIG. 2, the tube 2 includes a rib 20 protruding from the inner wall of the through hole 8 in the middle of the length direction. In this embodiment, the ribs 20 are four linear ribs extending linearly in the length direction of the through hole 8 of the tube 2. Hereinafter, in this embodiment, the rib 20 is referred to as a “linear rib 20”. The straight rib 20 is a semi-cylindrical elongated rib that is formed in the length direction of the through hole 8 of the tube 2 from the vicinity of the opening end face of the embedded tube 10 of the clip 3 and is formed to a little before the opening 7. The straight rib 20 is formed in a region from the nasal cavity insertion side (opening 7) of the tube 2 to a middle position of the length of the tube 2 (intermediate position between the opening 6 and the opening 7). More specifically, the linear rib 20 reaches a region from the nasal cavity insertion side of the tube 2 to the middle position of the length of the tube 2 and beyond that to the opening end surface of the embedded tube 10 on the inner side of the tube 2. Thus, since the linear rib 20 is formed in the area | region from the nasal cavity insertion side of the tube 2 to the middle position of the length of the tube 2, it is close to the opening part 7 in the middle of inserting the tube 2 in a nasal cavity. It is possible to reduce the risk that the region is bent at the back of the nasal cavity.

  As shown in FIG. 2 (2 B), the linear ribs 20 are formed at intervals of about 90 degrees from the center of the through hole 8 in the cross section along line AA of the tube 2. In this way, by forming the linear ribs 20 at substantially equal intervals along the periphery of the through hole 8, it is difficult to bend regardless of the direction of the tube 2. It should be noted that the three straight ribs 20 may be formed at intervals of approximately 120 degrees in the cross section along line AA of the tube 2. Further, the number of the linear ribs 20 may be one, two, or five or more. Further, the linear rib 20 may be formed only in the region from the opening 7 of the tube 2 to the middle position of the tube 2.

B. Manufacturing Method of Nasal Cavity Insertion Tube Device The clip 3 is preferably formed in a form in which the bridge portion 11 is extended substantially straight from the embedded tube 10 in the length direction of the tube. The bridge portion 11 is subjected to a bending deformation process into a U shape after the molding. However, you may produce the clip 3 in the state which curved the bridge part 11 from the beginning. Further, the clip 3 may be manufactured by separately molding a plurality of members (for example, the embedded tube 10 and the bridge portion 11) constituting the clip 3 and bonding them.

  Next, the portion of the embedded pipe 10 of the clip 3 is inserted into the mold, and the middle mold constituting the mold is also inserted into the embedded pipe 10. The middle mold is provided with four straight grooves for forming the straight ribs 20 that extend in the length direction thereof. A curable rubber composition that cures to become the tube 2 is supplied into the gap between the buried tube 10 and the mold and the middle mold. Next, when the mold is opened after curing the curable rubber composition, the embedded tube 10 is embedded in the thick portion of the tube 2, and four linear ribs 20 are provided on the inner wall of the through hole 8. The nasal cavity insertion tube device 1 is completed. After that, the stopper 4 may be molded with the expanded diameter portion 12 inserted, or may be molded before or simultaneously with the embedded tube 10 being insert-molded on the opening 6 side of the tube 2.

"Second embodiment and its modifications"
Next, a second embodiment of the nasal cavity insertion tube device of the present invention and a modification thereof will be described. In the second embodiment and its modifications, portions common to the first embodiment are denoted by the same reference numerals, and redundant description thereof is omitted.

  FIG. 3: is the longitudinal cross-sectional view cut | disconnected in the length direction of the nasal cavity insertion tube apparatus which concerns on 2nd embodiment of this invention, the expanded sectional view (3A) of the part B, and the modification of 2nd embodiment (3A) ) Is an enlarged cross-sectional view (3B) similar to FIG.

A. Structure of Nasal Cavity Insertion Tube Device As shown in FIG. 3 (3A), the nasal cavity insertion tube device 1a according to the second embodiment has a frame shape along a part of the through hole 8 of the tube 2a along the inner wall of the through hole 8. One rib (referred to as “frame-shaped rib”) 25 is provided. In this embodiment, the through hole 8 has a cylindrical shape. Therefore, the frame-shaped rib 25 is a ring-shaped (annular) rib formed along the circumference of the through-hole 8, and protrudes toward the center of the through-hole 8 from the inner wall other than the frame-shaped rib 25. Thus, the through hole 8 is partially narrowed. In this embodiment, the opening shape of the frame-like rib 25 is substantially circular. However, the opening shape of the frame-like rib 25 is not limited to a substantially circular shape, and may be a polygonal shape such as a triangle or a quadrangle, an elliptical shape, or an indefinite shape. The frame-like rib 25 is formed in a region from the nasal cavity insertion side of the tube 2a to the middle position of the length of the tube 2a.

  When the through hole 8 is formed in a polygonal shape, the frame-like rib 25 does not have to be an annular rib. Even when the through-hole 8 is formed in a polygonal shape, the opening shape of the frame-like rib 25 does not have to be the same as the cross-sectional shape of the through-hole 8 and can be, for example, substantially circular. Further, the frame-like rib 25 may be provided not only on the inner wall of the through-hole 8 but also two or more. Further, the two or more frame-like ribs 25 may be formed beyond the region from the nasal cavity insertion side of the tube 2a to the middle position of the length of the tube 2a.

  As shown in FIG. 3 (3B), the nasal cavity insertion tube device 1b according to the modified example of the second embodiment is replaced with the frame-like rib 25 described above, instead of the tube 2b which is one of its constituent members. You may provide the helical rib 26 which advances the through-hole 8 spirally and is protruded from the inner wall. The number of spiral turns is two in this modification, but is not limited to this.

  In this modification, the through hole 8 has a cylindrical shape. For this reason, the spiral rib 26 is a coil-like rib and protrudes toward the center of the through hole 8 from the inner wall other than the spiral rib 26 to partially narrow the through hole 8. In this embodiment, the opening shape of the spiral rib 26 is substantially circular. However, the opening shape of the spiral rib 26 is not limited to a substantially circular shape. The spiral rib 26 is formed in a region from the nasal cavity insertion side of the tube 2b to the middle position of the length of the tube 2b.

  When the through hole 8 is formed in a polygonal shape, the spiral rib 26 may not be a coiled rib. Further, even when the through hole 8 is formed in a polygonal shape, the opening shape of the spiral rib 26 does not have to be the same as the cross-sectional shape of the through hole 8, and can be, for example, substantially circular. Further, the spiral rib 26 may be provided not only at one place but also at two or more places on the inner wall of the through hole 8. Furthermore, the spiral rib 26 may be formed beyond the region from the nasal cavity insertion side of the tube 2b to the middle position of the length of the tube 2b. For example, a spiral rib 26 that draws a spiral from the opening 6 to the opening 7 of the tube 2b can be formed.

B. Manufacturing method of nasal cavity insertion tube device (manufacturing method of second embodiment)
Since the manufacturing of the clip 3 and the stopper 4 is the same as the method described in the first embodiment, a description thereof will be omitted. Prior to the integral molding of the clip 3 and the tube 2a and the formation of the frame-like rib 25, the portion of the embedded tube 10 of the clip 3 is inserted into the mold, and the inner mold constituting the mold also inside the embedded tube 10 Insert a type. The middle mold includes one annular groove in a part of the length direction. A curable rubber composition that cures to become the tube 2a is supplied into the gap between the buried tube 10 and the mold and the middle mold. Next, when the mold is opened after curing the curable rubber composition, it has a form in which the embedded tube 10 is embedded in the thick part of the tube 2 a, and one frame-like rib 25 is provided on the inner wall of the through hole 8. The nasal cavity insertion tube device 1a is completed. The middle mold can be separated from the tube 2a without any trouble even if the frame-like rib 25 is formed on the inner wall of the through hole 8 by pulling out the force from the through hole 8.

(Manufacturing method of modification of second embodiment)
Since the manufacturing of the clip 3 and the stopper 4 is the same as the method described in the first embodiment, a description thereof will be omitted. Prior to the integral molding of the clip 3 and the tube 2b and the formation of the spiral rib 26, the portion of the embedded tube 10 of the clip 3 is inserted into the mold, and the inner mold constituting the mold also inside the embedded tube 10 Insert a type. The middle mold is provided with a coiled groove in a part of its length direction. A curable rubber composition that cures to become the tube 2b is supplied into the gap between the buried tube 10 and the mold and the middle mold. Next, when the mold is opened after curing the curable rubber composition, the nasal cavity has a configuration in which the embedded tube 10 is embedded in the thick part of the tube 2b, and the inner wall of the through hole 8 includes the spiral rib 26. The insertion tube device 1b is completed. The middle mold can be separated from the tube 2b without any trouble even if the spiral rib 26 is formed on the inner wall of the through hole 8 by pulling out the force from the through hole 8. Further, when the spiral rib 26 is formed at a distance close to the length of the tube 2b, it can be pulled out from the tube 2b while rotating the middle mold.

"Other embodiments"
The preferred embodiments of the present invention have been described so far, but the present invention is not limited to such embodiments and can be implemented with various modifications.

  For example, in the first embodiment, instead of the linear rib 20, a curved rib that curves at a level that is not spiral can be formed on the inner wall of the through hole 8. Two or more frame-like ribs 25 or spiral ribs 26 may be formed at predetermined intervals in the length direction of the tube 2a or the tube 2b. Further, any combination of two or more of the linear rib 20, the frame-shaped rib 25 and the spiral rib 26 is formed on the inner wall of the through-hole 8 along the length direction of the tubes 2, 2a, 2b. May be.

  The present invention can be used as a member for preventing or reducing snoring.

1, 1a, 1b Nasal cavity insertion tube device 2, 2a, 2b Tube 6, 7 Opening 8 Through hole 20 Straight rib (an example of rib)
25 Frame-shaped rib (an example of a rib)
26 Spiral rib (an example of rib)

Claims (5)

A nasal cavity insertion tube device comprising a tube made of a hollow rubber-like elastic body having through holes connecting the openings at both ends, and capable of inserting the tube into the nasal cavity,
A nasal cavity insertion tube device comprising a rib in the middle of the tube in the length direction and protruding from the inner wall of the through hole.   The nasal cavity insertion tube device according to claim 1, wherein the rib is one or more linear ribs extending linearly in a length direction of the through hole of the tube.   The nasal cavity insertion tube device according to claim 1, wherein the rib is one or more frame-like ribs protruding in a frame shape along an inner wall of the through hole of the tube.   The nasal cavity insertion tube device according to claim 1, wherein the rib is one or two or more spiral ribs that spirally project along the inner wall of the through hole of the tube.   The nasal cavity insertion tube device according to any one of claims 1 to 4, wherein the rib is formed in a region from a nasal cavity insertion side of the tube to a middle position of the length of the tube.

Images