JP2017093623A - Tracheal tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tracheal tube with which the likelihood of inflammation occurring in a tracheal inner wall is reduced.SOLUTION: The tracheal tube according to the present invention comprises: a tube body; and a cuff which is mounted to the tube body, and of which barrel is contractible and expandable. The tracheal tube, when expanded, includes a tapered part which is rotationally symmetric about a center axis line of the tube body, and of which diameter increases from one side to the other along the center axis line. A covering region in which the tapered part covers a tracheal inner wall of a trachea when the barrel is expanded inside the trachea, includes: a circumferential wrinkle in continuously noncontact with the tracheal inner wall along a circumferential direction of the barrel; and a sealed part in continuously contact with the tracheal inner wall along the circumferential direction of the barrel. The sealed part is formed of a proximal side sealed portion located in a proximal side of the tube body across the circumferential wrinkle and a distal side sealed portion located in a distal side of the tube body across the circumferential wrinkle.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a tracheal tube.

  2. Description of the Related Art Conventionally, a tracheostomy tube is known as a tracheal tube that directly connects the outside of the body and the trachea to a patient who has difficulty in spontaneous breathing to facilitate breathing. A tracheostomy tube is provided with a contractible and expandable cuff on the outer peripheral surface of the tube body. After the tracheostomy tube is inserted into the patient's trachea with the cuff deflated, the cuff is expanded to contact the inner wall of the trachea and the tracheostomy tube is placed in the trachea (for example, patents) Reference 1 and Patent Document 2).

Japanese Patent No. 5271898 JP 2000-167060 A

  By the way, when the cuff is expanded in the patient's trachea and the tracheal tube is used, foreign substances such as sputum, saliva, blood, and aspiration are stored on the upstream side (jaw side) of the trachea. The stored foreign matter can be removed, for example, by suction from a lumen provided in the tracheal tube.

  However, when the cuff is expanded in the trachea, wrinkles may occur on the outer surface of the cuff, and a gap due to wrinkles may occur between the outer surface of the cuff and the inner wall of the patient's trachea. When a gap due to wrinkles is generated, there is a possibility that foreign matter flows downstream from the gap and flows into the lungs. Thus, the risk of the patient developing a disease such as pneumonia increases due to the foreign matter flowing into the lung.

  In addition, since a gap due to wrinkles is generated, the contact area between the cuff and the tracheal inner wall is reduced, and the cuff becomes easy to move. The ease of movement of the cuff increases the risk of inducing cough.

  In view of the above problems, an object of the present invention is to provide a tracheal tube capable of improving safety.

  In order to achieve the above object, a tracheal tube of the present invention comprises a tube main body, a cuff attached to the tube main body, and the trunk portion being contractible and expandable. The tube body is rotationally symmetric with respect to the central axis of the tube main body, and has a tapered portion whose diameter increases from one side to the other along the central axis, and the tapered portion is expanded in the trachea. A covering region covering the inner wall of the trachea continuously contacts the inner wall of the trachea, and a circumferential wrinkle that is not in contact with the inner wall of the trachea continuously in the circumferential direction of the trunk. A sealing portion that is located on a proximal end side of the tube body with the circumferential wrinkle interposed therebetween, and a distal end side of the tube body with the circumferential wrinkle interposed therebetween. Located on the tip side Characterized in that it is constituted by the closed part.

  Here, in the tracheal tube of the present invention, the proximal end side sealing portion is in contact with the inner wall of the trachea seamlessly across the circumferential direction of the trunk portion at the proximal end peripheral portion located on the proximal end side of the tube body. It is preferable to include a proximal end side sealing region.

  Further, the tracheal tube of the present invention is such that the distal end side sealing portion is in contact with the inner wall of the trachea without a break across the circumferential direction of the body portion at the distal end side peripheral portion located on the distal end side of the tube body. It is preferable to include a region.

  In the tracheal tube of the present invention, it is preferable that the taper portion has a diameter that increases from the distal end side to the proximal end side of the tube body with the central axis as a center.

  In the tracheal tube of the present invention, it is preferable that the tapered portion has a diameter-expanded portion having a diameter larger than that of the periphery in a state where the body portion is expanded at an end portion on a distal end side of the tube main body.

  In the tracheal tube of the present invention, it is preferable that the tapered portion has a thin-walled portion whose thickness is thinner than that of the periphery at the end portion on the distal end side of the tube body.

  According to the present invention, a tracheal tube capable of improving safety can be provided.

It is a figure which shows the state which detained the tracheal tube which concerns on one Embodiment of this invention in the trachea. It is a perspective view which shows the tube main body 2 in the tracheal tube 1 shown in FIG. It is a side view which shows the outline of the cuff 3 with which the tracheal tube 1 shown in FIG. 1 is provided. It is sectional drawing of the cuff 3 shown in FIG. 4 is a flowchart showing a procedure of a method for attaching the cuff 3. It is the figure (the 1) which shows typically an example of the cyclic | annular covering area | region 30 formed when the tracheal tube 1 provided with the cuff 3 shown in FIG. 3 is expanded in a trachea. It is the figure (the 2) which shows typically an example of the cyclic | annular covering area | region 30 formed when the tracheal tube 1 provided with the cuff 3 shown in FIG. 3 is expanded in a trachea. It is a figure which shows the modification of the shape of the cuff 3 with which the tracheal tube 1 is provided.

  Hereinafter, an embodiment of a tracheal tube according to the present invention will be described with reference to the drawings. In each figure, the same code | symbol is attached | subjected to the common member.

  FIG. 1 is a view showing a state in which a tracheal tube according to an embodiment of the present invention is placed in the trachea. FIG. 2 is a perspective view showing a single tube body 2 in the tracheal tube 1 shown in FIG. FIG. 3 is a side view showing an outline of the cuff 3 provided in the tracheal tube 1 shown in FIG.

  As shown in FIG. 1, a tracheal tube 1 is attached to a tube body 2, a contractible and expandable cuff 3 attached on the outer peripheral surface of the tube body 2, and one end of the tube body 2. And a flange member 4.

  The tube body 2 defines a hollow portion 7 penetrating from the distal end 5 to the proximal end 6 in the extending direction of the central axis O1 of the outer peripheral surface of the tube main body 2 (hereinafter simply referred to as “central axial direction A”). In the state where the tracheal tube 1 is inserted and indwelled in the trachea from the outside, the airway is secured by the hollow portion 7. The distal end 5 of the tube body 2 is the distal end of the tube body 2 and is one end located on the trachea branch portion side in a state where the tracheal tube 1 is placed in the trachea. The proximal end 6 is the proximal end of the tube body 2 and is the other end that is located on the jaw side when the tracheal tube 1 is placed in the trachea.

  The tube body 2 includes a distal end portion 8 including a distal end 5, a cuff attachment portion 9 that is continuous on the proximal end 6 side of the distal end portion 8 in the central axis direction A, and the cuff 3 is attached to the outer peripheral surface, and the cuff attachment portion. 9 is provided with a curved portion 10 that is continuous on the proximal end 6 side, and a proximal end portion 11 that is continuous on the proximal end 6 side of the curved portion 10 and includes the proximal end 6. In other words, the distal end portion 8 of the tube main body 2 is connected to the proximal end portion 11 via the cuff mounting portion 9 and the bending portion 10. The flange member 4 is attached to the base end portion 11.

  Two hollow portions extending along the central axis O1 are defined in the wall of the tube main body 2 between the outer peripheral surface of the tube main body 2 and the inner peripheral surface defining the hollow portion 7 of the tube main body 2. ing. Specifically, the tube body 2 includes a first lumen and a first lumen that are formed in the wall and extend along the central axis O1 from the first base end opening 12a and the second base end opening 13a that are defined on the base end surface. It has 2 lumens. In addition, although the small diameter 1st lumen | rumen and 2nd lumen | rumen which were divided in the wall are also a hollow part, in order to distinguish from the large diameter hollow part 7 for ensuring an airway for convenience of explanation, here, "lumen" is used. Called.

  The first lumen extends from the first base end opening 12a on the base end surface to a predetermined position on the base end portion 11 side with respect to the cuff 3 and the cuff mounting portion 9, and a tube formed at the predetermined position. The tube 2 communicates with the outside of the tube body 2 through a suction port portion 12 b that penetrates to the outer peripheral surface of the body 2. In addition, the suction port part 12b of this embodiment is a suction port, and is formed in the curved part 10 as a position of the base end part 11 side rather than the cuff 3 and the cuff mounting part 9. FIG. The first lumen sucks and removes foreign matter X such as sputum, saliva, blood, and aspirations stored in the trachea upstream side (jaw side) with respect to the cuff 3 in a state indwelled in the trachea.

  The second lumen extends from the second base end opening 13a of the base end surface to the position of the cuff 3 and the cuff mounting portion 9, and passes through to the outer peripheral surface of the tube body 2 formed at that position. Communicate with the outside through. Therefore, for example, using a syringe or the like, air enters the space (annular space) defined by the outer peripheral surface of the cuff mounting portion 9 and the inner surface of the cuff 3 through the flow path 13b from the second proximal end opening 13a of the second lumen. The cuff 3 can be expanded by the supplied fluid. Further, with respect to the expanded cuff 3, the cuff 3 can be contracted by sucking fluid from the annular space through the flow path 13b of the second lumen and the second proximal end opening 13a. As described above, the second lumen is a lumen used for contracting and expanding the cuff 3 and is hereinafter referred to as a “cuff lumen”.

  Examples of the constituent material of the tube body 2 include silicone, polyvinyl chloride, polyethylene, polypropylene, cyclic polyolefin, polystyrene, poly- (4-methylpentene-1), polycarbonate, acrylic resin, and acrylonitrile-butadiene-styrene copolymer. Various resins such as polyesters such as polyethylene terephthalate, butadiene-styrene copolymers, and polyamides (for example, nylon 6, nylon 6,6, nylon 6,10, nylon 12) can be used. Among them, it is preferable to use a resin such as polyvinyl chloride, polypropylene, cyclic polyolefin, polyester, and poly- (4-methylpentene-1) because it is easy to mold.

  As shown in FIG. 1, the flange member 4 is attached to the base end portion 11 (see FIG. 2 and the like) of the tube body 2, and when the tube body 2 is inserted into the trachea from outside the body, the tracheal tube 1 is placed. Furthermore, the tip 8 is fixed at an appropriate position in the trachea by contacting the skin. The proximal end portion 11 of the tube main body 2 is inserted into the flange member 4. The flange member 4 is fitted to the tube main body 2 so as to be fitted to the tube main body 2, and protrudes radially outward from the outer wall of the cylindrical portion 17. And a plate-like flange portion 18 that comes into contact with the skin in the indwelling state.

  The first lumen communicates with the outside of the tracheal tube 1 on the proximal end side of the tracheal tube 1 through a corresponding communication hole formed in the cylindrical portion 17. Aspiration of a foreign substance X such as aspiration is performed by connecting a syringe or a suction pump to the other end of the suction tube 19 whose one end is fitted to the communication hole of the cylindrical portion 17 exposed outside the body. To do.

  Further, the cuff lumen communicates with the outside of the tracheal tube 1 on the proximal end side of the tracheal tube 1 through a corresponding communication hole formed in the cylindrical portion 17. Therefore, if a syringe or the like is connected to the other end of the cuff tube having one end fitted into the communicating hole of the cylindrical portion 17 exposed outside the body, the cuff 3 can be moved to the annular space by operating the syringe or the like outside the body. The fluid can be supplied and sucked, whereby the expansion and contraction of the cuff 3 can be manipulated.

  The flange member 4 can be formed of the same material as that of the tube main body 2, for example.

  The cuff 3 is attached on the outer peripheral surface of the cuff mounting portion 9 of the tube main body 2, and is divided by the outer peripheral surface of the cuff mounting portion 9 and the inner surface of the cuff 3 through the cuff lumen of the tube main body 2 described above. It can be expanded by the pressure of the fluid supplied to the annular space. Therefore, when the tracheal tube 1 is inserted from the outside into the trachea and the tracheal tube 1 is to be placed at a predetermined position, fluid is supplied to the annular space through the cuff lumen of the tube body 2, and the cuff 3 is Expand. As a result, the outer surface of the expanded cuff 3 is in close contact with the inner wall of the trachea, and the cuff 3 is sandwiched between the inner peripheral wall surface of the trachea by the frictional force between the outer surface of the cuff 3 and the inner wall of the trachea. Block the trachea around. Therefore, the position of the cuff 3 in the trachea is fixed, and the tracheal tube 1 can be placed at the predetermined position described above.

  Further, when the tracheal tube 1 is removed from the trachea or when the position where the tracheal tube 1 is placed is adjusted, the cuff lumen is used to suck the fluid in the annular space and the cuff 3 is contracted. . Thereby, the tube main body 2 of the tracheal tube 1 can be moved along the trachea in the trachea.

  The cuff 3 has an end edge on the base end 6 side in the central axis direction A (corresponding to a base end side connecting portion 14b described later) and an end edge on the front end 5 side (corresponding to a front end side connecting portion 14a described later). In the entire region of the tube body 2 in the circumferential direction B (see FIG. 2), the tube body 2 is joined to the outer peripheral surface of the cuff mounting portion 9 by welding, ultrasonic fusion, or the like. Thereby, the annular space described above is formed by the inner surface of the cuff 3 and the outer peripheral surface of the cuff mounting portion 9.

  The cuff 3 will be described in more detail with reference to FIGS. 3 and 4. FIG. 3 shows only the cuff 3 and a part of the tube main body 2 to which the cuff 3 is attached in the vicinity of the cuff 3, and shows a state where the cuff 3 is expanded at a constant pressure (for example, 16 to 25 mmHg). ing. That is, when the cuff 3 is expanded under a condition in which an external force that inhibits the expansion of the cuff is not applied, for example, outside the body, the state shown in FIG. 3 is obtained. 4 is a cross-sectional view of the cuff 3 shown in FIG.

  The cuff 3 has a distal end side connection portion 14a and a proximal end side connection portion 14b fused to the tube body 2 on the distal end 5 side and the proximal end 6 side. The cuff 3 has a body portion that can be expanded and contracted. In the present embodiment, the body portion has a tapered portion 16 and a connecting portion. The connecting portion connects the tapered portion 16 and the distal end side connecting portion 14a or the proximal end side connecting portion 14b. The connecting portion that connects the tapered portion 16 and the distal end side connecting portion 14a is specifically referred to as the distal end side connecting portion 15a, and the connecting portion that connects the tapered portion 16 and the proximal end side connecting portion 14b is particularly referred to as the proximal end side connecting portion. 15b.

  In the cuff 3, the outer shape of the tapered portion 16 formed between the distal end side connecting portion 14a and the proximal end side connecting portion 14b is such that the distal end side connecting portion 14a is on the upper bottom side and the proximal end side connecting portion 14b is on the lower bottom side. The shape is substantially a truncated cone with the central axis O1 as the central axis. That is, the taper portion 16 is rotationally symmetric with respect to the central axis O1, and in a side view, a tapered shape in which the diameter of the outer surface spreads around the central axis O1 from the distal end 5 side toward the proximal end 6 side, in other words, The taper shape is such that the diameter of the outer surface decreases from the proximal end 6 side toward the distal end 5 side with the central axis O1 as the center.

  In the example shown in FIGS. 3 and 4, the distal end side connection portion 14 a is fused to the tube body 2 so as to expand toward the distal end side rather than the taper portion 16, and the proximal end side connection portion 14 b is folded toward the taper portion 16 side. The state in which the distal end side connection portion 14a and the proximal end side connection portion 14b are fixed to the outer wall of the tube body 2 is shown in FIG. And it is not restricted to what is shown in FIG. For example, the distal end side connection portion 14 a may be fixed to the tube body 2 within the tapered portion 16 in a state where the distal end side connection portion 14 a is folded toward the tapered portion 16, and the proximal end side connection portion 14 b extends to the proximal end side relative to the tapered portion 16. In this manner, the tube body 2 may be fixed.

  Here, a method of attaching the cuff 3 of the tracheal tube 1 will be described. FIG. 5 is a flowchart showing the procedure of the above-described cuff 3 attachment method.

  As shown in FIG. 5, the mounting method of the cuff 3 includes a step S1 of turning the annular cuff material upside down, a step S2 of inserting the tube material into the inside of the cuff material turned upside down, and externally fitting the cuff material upside down on the tube material. Step S3 for fixing one end side of the annular cuff material to the outer wall of the tube material, Step S4 for turning the other end side of the cuff material upside down from the one end side of the fixed cuff material, and the other end of the cuff material And S5 for fixing the side to the outer wall of the tube material. The tube material means a completed tube body 2 or a base of the tube body 2. Further, the annular cuff material constitutes the cuff 3 of the tracheal tube 1 by being attached to the tube material, and means a base of the cuff 3. The annular cuff material includes a large-diameter portion that becomes the tapered portion 16 and an edge portion that is continuous on both sides of the large-diameter portion and has a smaller diameter than the large-diameter portion. Hereinafter, each step will be described in detail.

  In step S1, the annular cuff material is turned over so that the surface of the large-diameter portion that becomes the inner wall of the tapered portion 16 is exposed to the outside. However, if there is no distinction between the front and back of the annular cuff material, or if it has already been reversed, step S1 can be omitted.

  In step S2, the inverted annular cuff material is externally fitted from one end side of the tube material (for example, one end side serving as the base end 6 of the tube body 2). In addition, you may make it externally fit the cyclic | annular cuff material turned inside out from the other end side (for example, one end side used as the front-end | tip 5 of the tube main body 2).

  In step S3, an end edge portion that is an end edge portion of the annular cuff material that is externally fitted to the tube material, which is the base-side connection portion 14b, is fixed to the outer wall of the tube material by fusion or the like. To do. In addition, when the edge part of the one end side of a cuff material is fixed with respect to the outer wall of a tube material, the edge part of the one end side of a cuff material is the center axis line direction (center axis direction A of the tube main body 2). In the same direction) extending outside the large diameter portion. Further, the end edge portion on one end side fixed to the tube material is an end edge portion serving as the base end side connection portion 14b. When the end edge portion on the one end side is fixed to the outer wall of the tube material, the cuff material is used. Since it is in an inverted state, it is positioned in the direction of the distal end side of the tube material, that is, the distal end 5 side of the tube body 2 from the large diameter portion.

  In step S4, the other end side of the cuff material is turned over again starting from the edge portion on the one end side of the fixed cuff material. That is, it turns over so that the surface which becomes the outer wall of the taper part 16 among large diameter parts may be exposed outside. More specifically, with the base end side connection portion 14b as a starting point, the end portion on the other end side of the annular cuff material, the end edge portion serving as the distal end side connection portion 14a, and the large diameter portion serving as the taper portion 16 Turn over. Thereby, the base end side connection part 14b will be in the state folded in the large diameter part side used as the taper part 16 in the central-axis direction of a tube material. On the other hand, the end edge portion that becomes the distal end side connection portion 14a extends outside the large diameter portion that becomes the tapered portion 16 in the central axis direction of the tube material, specifically, more on the distal end side of the tube material than the large diameter portion. It will be in the state that existed.

  In step S5, an end edge portion which is the end edge portion on the other end side of the cuff material, which becomes the distal end side connection portion 14a, is fixed to the outer wall of the tube material by fusion or the like. Thereby, fixation with respect to the tube material of a cuff material is completed.

  As described above, the cuff 3 can be attached to the tube material. Here, the method for attaching the cuff 3 has been described with reference to FIG. 5. However, as the cuff 3, the distal end side connection portion 14 a and the proximal end side connection portion 14 b are spread more to the distal end side than the taper portion 16. When using what was fixed to the tube main body 2, the process of fitting the annular cuff material used as the cuff 3 to the tube material without turning over, and fixing one end side of the annular cuff material to the outer wall of the tube material; And a step of fixing the other end side of the cuff material to the outer wall of the tube material. More specifically, of the annular cuff material that is externally fitted to the tube material, both end edges extending to the outside of the large diameter portion that becomes the tapered portion 16 in the central axis direction of the tube material are fused or the like. It fixes to the outer wall of a tube material, and forms the front end side connection part 14a and the base end side connection part 14b.

  Next, the state of the trunk when the cuff 3 of the present embodiment is expanded in the trachea will be described. The tapered portion 16 of the cuff 3 covers the tracheal inner wall of the trachea in a state where the trunk portion is expanded in the trachea. Hereinafter, a region of the outer wall of the tapered portion 16 of the cuff 3 that covers the inner wall of the trachea in a state where the trunk portion is expanded in the trachea is referred to as a “cover region”. “When the cuff is expanded in the trachea” means that the cuff is expanded with a constant pressure of, for example, about 16 to 25 mmHg.

  FIG. 6 is a diagram schematically illustrating an example of an annular covering region 30 formed when the cuff 3 included in the tracheal tube 1 is expanded in the trachea. 6 is the circumferential direction of the tracheal inner wall (the same direction as the circumferential direction B), and the vertical direction in FIG. 6 is the extending direction of the trachea (the same direction as the central axis direction A). As shown in FIG. 6, the covering region 30 includes a contact portion 31 that is a portion that contacts the tracheal inner wall of the tapered portion 16 and a wrinkle portion 32 that covers the tracheal inner wall of the tapered portion 16 but is not in contact therewith. Including.

  Since the contact part 31 is an area | region closely_contact | adhered between the taper part 16 and a trachea inner wall, foreign materials, such as aspiration, do not flow into the contact part 31. FIG.

  The wrinkle portion 32 is formed by allowing the outer surface of the taper portion 16 to be wrinkled without the outer surface of the taper portion 16 being fully expanded. Accordingly, the wrinkle portion 32 has a space between the tapered portion 16 and the tracheal inner wall. For this reason, foreign matter such as aspiration may flow into the wrinkle portion 32.

  As shown in FIG. 6, the contact portion 31 includes a sealing portion 31 a that is in contact with the inner wall of the trachea without a break along the circumferential direction B of the trunk portion. Further, the wrinkle portion 32 includes a circumferential wrinkle 32b that is continuously in contact with the inner wall of the trachea along the circumferential direction B of the trunk portion. The sealing portion 31a is divided in the central axis direction A by the circumferential wrinkle 32b, and the proximal end side sealing portion 31b located on the proximal end side of the tube body 2 with the circumferential wrinkle 32b interposed therebetween, and the tube body 2 with the circumferential wrinkle 32b interposed therebetween. It is comprised by the front end side sealing part 31c located in the front end side.

  Thus, according to the tracheal tube 1 according to the present embodiment, as shown in FIG. 6, the covering region 30 includes the proximal end side sealing portion 31 b and the distal end side sealing portion 31 c across the circumferential wrinkle 32 b. Thus, the plurality of sealing portions can reduce the risk of foreign substances such as aspiration from the proximal end of the cuff 3 and reduce the risk that the patient will develop a disease such as pneumonia. Moreover, the contact resistance between the cuff 3 and the tracheal inner wall is increased by the plurality of sealed portions, the cuff 3 is more fixed, and the risk of inducing cough can be reduced. Therefore, the tracheal tube 1 improves safety.

  As shown in FIG. 6, the wrinkle portion 32 is formed on either the proximal end side peripheral portion 33 a located on the proximal end side of the tube body 2 or the distal end side peripheral portion 33 b located on the distal end side of the tube body 2. The end wrinkles 32c that communicate with each other and the normal wrinkles 32a other than the circumferential wrinkles 32b and the end wrinkles 32c may be included.

  Moreover, although the covering area | region 30 shown in FIG. 6 was supposed to have one circumference wrinkle 32b, you may have several circumference wrinkles 32b.

  FIG. 7 is a diagram schematically illustrating another example of the annular covering region 30 formed when the cuff 3 included in the tracheal tube 1 is expanded in the trachea. The left-right direction and the up-down direction in FIG. 7 are the same as the left-right direction and the up-down direction in FIG.

  As shown in FIG. 7, the contact portion 31 includes a sealing portion 31 a that is in contact with the inner wall of the trachea without breaking along the circumferential direction B of the trunk portion, as in FIG. 6. Similarly to FIG. 6, the wrinkle portion 32 includes a circumferential wrinkle 32 b that is not in contact with the tracheal inner wall continuously in the circumferential direction B of the trunk portion. As in FIG. 6, the sealing portion 31a includes a proximal end side sealing portion 31b positioned on the proximal end side of the tube body 2 with the circumferential wrinkle 32b interposed therebetween, and a distal end positioned on the distal end side of the tube body 2 with the circumferential wrinkle 32b interposed therebetween. It is comprised by the side sealing part 31c.

  Further, as shown in FIG. 7, the proximal end side sealing portion 31 b is in contact with the tracheal inner wall seamlessly in the circumferential direction B of the trunk portion at the proximal end peripheral portion 33 a located on the proximal end side of the tube body 2. A proximal end side sealing region 34a is included. That is, the wrinkle portion 32 does not reach the base end side peripheral edge portion 33a (does not communicate with the outside of the covering region 30 from the base end side peripheral edge portion 33a). Further, as shown in FIG. 7, the distal end side sealing portion 31 c is a distal end side sealing portion that is in contact with the inner wall of the trachea in the circumferential direction B of the trunk portion at the distal end side peripheral portion 33 b located on the distal end side of the tube body 2. The region 34b is included. That is, the wrinkle portion 32 does not reach the distal end side peripheral portion 33b (not communicated from the front end side peripheral portion 33b to the outside of the covering region 30).

  Thus, according to the tracheal tube 1 according to the present embodiment, as shown in FIG. 7, the proximal end side sealing portion 31 b includes the proximal end side sealed region 34 a, so that aspiration or the like from the proximal end side of the cuff 3 The risk of the foreign substance flowing in can be further reduced, and the risk of the patient developing a disease such as pneumonia can be further reduced. Therefore, the tracheal tube 1 improves safety.

  Further, according to the tracheal tube 1 according to the present embodiment, as shown in FIG. 7, since the distal end side sealing portion 31c includes the distal end side sealed region 34b, the contact resistance between the cuff 3 and the tracheal inner wall increases. The cuff 3 is further fixed, and the risk of inducing coughing can be further reduced. Therefore, the tracheal tube 1 improves safety.

  In the tracheal tube 1 having the above-described properties, for example, an angle (taper angle) θ (see FIG. 3) formed by the tapered portion 16 and the central axis O1 in a side view of the cuff 3 is set to a central axis O1 of the tapered portion 16. The length along the cuff (cuff width), the maximum diameter (cuff diameter) of the circle formed by the outer surface of the tapered portion 16 on the surface orthogonal to the central axis O1, and the material and thickness of the film constituting the outer surface of the cuff 3 are adjusted. This can be realized. Hereinafter, an example of a configuration that can more easily realize the tracheal tube 1 having such properties will be described with reference to FIG.

  FIG. 8 is a view showing a modification of the shape of the cuff 3 provided in the tracheal tube 1. As shown in FIG. 8, the tapered portion 16 has an enlarged diameter portion 16 a that has a diameter larger than that of the surroundings when the body portion is expanded at the end portion on the distal end side of the tube body 2. The enlarged diameter portion 16a is formed, for example, by providing an annular protrusion protruding outward in the radial direction around the central axis O1 in a part of the film constituting the outer surface of the cuff 3. Here, the end portion on the distal end side of the tube body 2 in the tapered portion 16 corresponds to the distal end side peripheral edge portion 33 b of the covering region 30. Therefore, according to the tracheal tube 1 provided with such a cuff 3, the distal end side peripheral edge portion 33b easily comes into contact with the tracheal inner wall by the enlarged diameter portion 16a, and the distal end side sealing portion 31c is easily formed. The enlarged diameter portion 16a may be provided at the proximal end portion instead of or in addition to the distal end portion of the tube body 2 in the tapered portion 16. Thereby, the proximal end peripheral edge portion 33a easily comes into contact with the tracheal inner wall by the enlarged diameter portion 16a, and the proximal end side sealing portion 31b is also more easily formed.

  Moreover, the taper part 16 in the cuff 3 shown in FIG. 8 constitutes an outer surface than the periphery at the end part on the distal end side of the tube main body 2 instead of or in addition to the enlarged diameter part 16a. You may have a thin part with a thin film thickness. According to the tracheal tube 1 having such a cuff 3, the thin-walled portion having a thickness smaller than that of the surrounding film is easier to expand than the surrounding film in a state where the body portion is expanded. It becomes easy to come into contact with the inner wall of the trachea, and the distal end side sealing portion 31c is easily formed. Note that the thin portion may be provided at the proximal end portion instead of or in addition to the distal end portion of the tube body 2 in the tapered portion 16. Thereby, the proximal end peripheral edge portion 33a is easily brought into contact with the tracheal inner wall by the thin portion, and the proximal end side sealing portion 31b is also more easily formed.

  The present invention is not limited to the configuration specified in the above-described embodiment, and various modifications can be made without departing from the spirit of the invention described in the claims.

  For example, FIG. 7 shows a covering region 30 in which the proximal-side sealing portion 31b includes the proximal-side sealing region 34a and the distal-side sealing portion 31c includes the distal-side sealing region 34b. The base end side sealing portion 31b includes the base end side sealing region 34a and the tip end side sealing portion 31c does not include the tip end side sealing region 34b, or the base end side sealing portion 31b is not limited to 30. It is good also as the covering area | region 30 which does not contain the base end side sealing area | region 34a and the front end side sealing part 31c contains the front end side sealing area | region 34b.

  The present invention relates to a tracheal tube.

DESCRIPTION OF SYMBOLS 1 Tracheal tube 2 Tube body 3 Cuff 4 Flange member 5 Tube body tip 6 Tube body proximal end 7 Hollow portion 8 Tube body distal end 9 Tube body cuff mounting portion 10 Tube body bending portion 11 Tube body proximal end Part 12a First base end opening 12b Suction port (suction port)
13a 2nd base end opening 13b Flow path 14a Tip side connection part 14b Base end side connection part 15a Tip side connection part 15b Base end side connection part 16 Tapered part 16a Wide diameter part 17 Cylindrical part 18 Flange part 19 Suction tube 30 Covering Area 31 Contact portion 31a Sealed portion 31b Base end side sealed portion 31c Tip end side sealed portion 32 Wrinkle portion 32a Normal wrinkle 32b Circumferential wrinkle 32c End portion wrinkle 33a Base end side peripheral portion 33b Tip end side peripheral portion 34a Base end side sealed region 34b Tip Side sealed area A Direction of central axis of outer peripheral surface of tube body B Circumferential direction of tube main body O1 Center axis of outer peripheral surface of tube main body

Claims (6)

A tube body;
A cuff that is attached to the tube body, and the trunk portion is contractible and expandable,
The trunk portion is rotationally symmetric with respect to the central axis of the tube main body in an expanded state, and has a tapered portion whose diameter spreads from one to the other along the central axis.
In the state where the trunk portion is expanded in the trachea, the tapered region covers the tracheal inner wall of the trachea.
A circumferential wrinkle that is not in contact with the inner wall of the trachea continuously over the circumferential direction of the trunk,
A sealing part that is in continuous contact with the inner wall of the trachea across the circumferential direction of the trunk part,
The sealing portion includes a proximal-side sealing portion positioned on the proximal end side of the tube main body with the circumferential wrinkle interposed therebetween, and a distal-end side sealing portion positioned on the distal end side of the tube main body with the circumferential wrinkle interposed therebetween. To be
Tracheal tube. The proximal end side sealing portion includes a proximal end side sealing region that is in contact with the inner wall of the trachea without a break across the circumferential direction of the trunk portion in the proximal end side peripheral portion located on the proximal end side of the tube body.
The tracheal tube according to claim 1. The distal-end-side sealing portion includes a distal-end-side sealing region that is in contact with the tracheal inner wall seamlessly across the circumferential direction of the trunk portion at the distal-end peripheral edge located on the distal end side of the tube body
The tracheal tube according to claim 1 or 2.   The tracheal tube according to any one of claims 1 to 3, wherein the tapered portion has a diameter that increases from the distal end side to the proximal end side of the tube main body with the central axis as a center.   5. The tracheal tube according to claim 4, wherein the tapered portion has an enlarged diameter portion at a distal end side of the tube main body having a diameter larger than that of the surrounding area in a state where the trunk portion is expanded.   6. The tracheal tube according to claim 4, wherein the tapered portion has a thin-walled portion having a thickness smaller than that of the periphery at an end portion on a distal end side of the tube main body.

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