JP2016036675A - Tracheal tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tracheal tube capable of easily sucking foreign matters through a plurality of suction lumens even for a patient who is lying down.SOLUTION: A tracheal tube comprises a tube body and a cuff. A first lumen communicates with the outward of the tube body through a first suction port part formed at a position on the side of a base end part with respect to the cuff, and a second lumen communicates with the inward of the tube body through a second suction port part formed at a position on the side of a tip end part with respect to the cuff. The first lumen and the second lumen are formed on the side of a lower surface part. On a cross section orthogonal to the center axis of an inner peripheral surface, the second lumen is formed at a position which does not intersect a first straight line which passes through two points on an inner wall constituting the maximum diameter of the first lumen, and the first lumen is formed at a position which does not intersect a second straight line which passes through two points on an inner wall constituting the maximum diameter of the second lumen.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a tracheal tube.

  Traditionally, the trachea is a tracheal tube that makes it easy to breathe and suck foreign objects such as sputum by directly connecting the outside of the body and the trachea to patients who have difficulty breathing spontaneously or patients who have difficulty discharging sputum by themselves. Incision tubes are known. Medical workers connect the ventilator to the tracheostomy tube to maintain the patient's breathing or insert a suction catheter into the tracheostomy tube to aspirate and remove foreign substances such as sputum . Patent Document 1 discloses such a tracheal tube.

  The tracheal tube disclosed in Patent Literature 1 includes a suction lumen extending from the proximal end side to the distal end side, and the suction lumen communicates with the outside through a suction port formed on the proximal end side with respect to the cuff. ing.

  Further, Patent Document 2 has a suction lumen extending from the proximal end side to the distal end side, and the suction lumen communicates with the inside through a suction port formed on the distal end side with respect to the cuff. Is disclosed.

JP 2003-93512 A JP 2011-156246 A

  There is a need for a tracheal tube having a plurality of suction lumens so that foreign substances such as sputum can be sucked and removed in the trachea both on the proximal side (jaw side) and on the distal side (tracheal bifurcation side) with respect to the cuff. .

  An object of the present invention is a tracheal tube having a plurality of suction lumens capable of sucking foreign matter on both the proximal side and the distal side from the cuff, and is used for a plurality of suctions even for a sleeping patient An object of the present invention is to provide a tracheal tube capable of easily sucking foreign matter through a lumen.

  A tracheal tube as a first aspect of the present invention includes a tube main body in which a distal end portion and a base end portion are connected via a bending portion, and a contractible and expandable cuff attached on the outer peripheral surface of the tube main body. A first lumen and a second lumen are defined in a wall of the tube body, and the first lumen is formed at a position closer to the proximal end than the cuff. The first suction port that penetrates to the outer peripheral surface communicates with the outside of the tube main body, and the second lumen penetrates to the inner peripheral surface formed at a position closer to the distal end than the cuff. A plane including the central axis of the inner peripheral surface of the tube body at the position of the distal end portion and the proximal end portion is a first virtual plane. And if before The first lumen and the second lumen include, in a cross section including the first lumen and the second lumen and orthogonal to the central axis, a second virtual that passes through the central axis on the cross section and is orthogonal to the first virtual plane. It is formed on the lower surface side located on the outer curved surface side of the curved portion of the outer peripheral surface of the tube body with respect to the plane, and in the cross section, the second lumen is an inner wall that defines the first lumen The first lumen is formed at a position where the first straight line passing through the two points constituting the maximum diameter of the first lumen does not intersect, and the first lumen is the second lumen of the inner wall defining the second lumen. The second straight line passing through two points constituting the maximum diameter is formed at a position where it does not intersect.

  In the tracheal tube as one embodiment of the present invention, the angle formed by the first straight line and the second straight line is preferably larger than 90 in the cross section.

  As one embodiment of the present invention, in the cross section, the midpoint of the first lumen on the first straight line is centered from the midpoint of the second lumen on the second straight line with the central axis as the center. The angle is preferably in the range of 30 to 80 degrees.

  As one embodiment of the present invention, the central angle is preferably in the range of 40 to 70 degrees.

  As one embodiment of the present invention, the central angle is preferably in the range of 55 to 65 degrees.

  As one embodiment of the present invention, it is preferable that the second lumen is formed at a position that intersects the first virtual plane.

  According to the tracheal tube of the present invention, a foreign patient can be easily sucked through a plurality of suction lumens even for a sleeping patient.

It is a figure which shows the state which detained the tracheal tube 1 as 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. 3A and 3B are side views of the tube body 2 alone shown in FIG. 4 (a) and 4 (b) are side views of the tube body 2 alone shown in FIG. FIG. 5A is a top view of the tube main body 2, and FIG. 5B is a bottom view of the tube main body 2. It is II sectional drawing of Fig.3 (a). It is II-II sectional drawing of Fig.3 (a). It is sectional drawing which added the cuff 3 to the III-III sectional drawing of Fig.5 (a). It is the figure which looked at the tracheal tube 1 shown in FIG. 1 from the base end side. It is IV-IV sectional drawing of Fig.4 (a). It is a figure which shows the modification of the 1st suction port part 12b in the tube main body 2 of the tracheal tube 1 shown in FIG. It is a flowchart figure which shows the procedure of the manufacturing method of the tube main body 2 among the manufacturing methods of the tracheal tube. It is sectional drawing which shows the tracheal tube set 100. FIG. It is sectional drawing which shows the modification of the 2nd suction opening part shown in FIG.

  Hereinafter, embodiments of a tracheal tube according to the present invention will be described with reference to FIGS. 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 1 according to the present embodiment is placed in the trachea, and FIG. 2 is a perspective view showing a single tube body 2 of the tracheal tube 1. 3A, 3B, 4A, and 4B are side views of the tube main body 2. FIG. FIG. 5A is a top view of the tube main body 2, and FIG. 5B is a bottom view of the tube main body 2. 6 is a cross-sectional view taken along line II in FIG. 3A, FIG. 7 is a cross-sectional view taken along line II-II in FIG. 3A, and FIG. 8 is a cross-sectional view taken along line III-III in FIG. FIG. 9 is a view of the tracheal tube 1 as seen from the proximal end side. FIG. 10 is a cross-sectional view taken along the line IV-IV in FIG. In addition, in FIG. 8, in addition to the tube main body 2, the cuff 3 is shown for convenience of explanation.

  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.

  As shown in FIGS. 2 to 5 and the like, the tube main body 2 extends from the distal end 5 in the extending direction of the central axis O1 of the inner peripheral surface of the tube main body 2 (hereinafter simply referred to as “central axis direction A”). A hollow portion 7 penetrating to the proximal end 6 is defined, and in the state where the tracheal tube 1 is inserted and indwelled from the outside into the trachea, the hollow portion 7 ensures an airway. 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.

  More specifically, the tube main 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 on the outer peripheral surface. The cuff mounting portion 9 includes 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.

  Here, in the present embodiment, when the tube body 2 is viewed from the distal end 5 side of the distal end portion 8 (see FIG. 3B), the direction in which the proximal end 6 is located with respect to the distal end 5, that is, the distal end 5 On the other hand, the direction in which the bending portion 10 is curved is referred to as “upper side”, and the opposite side is referred to as “lower side”.

  Moreover, as shown in FIGS. 2-8 etc., 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 which divides the hollow part 7 of the tube main body 2, it is center axis O1. The three hollow parts extending along are defined. Specifically, the tube body 2 is formed in the wall and extends from the first to third base end openings 12a to 14a defined on the base end surface along the central axis O1 to the first to third lumens 12 to 12. 14. In addition, although it is a hollow part also about the small diameter 1st-3rd lumens 12-14 divided in the wall, in order to distinguish from the large diameter hollow part 7 for securing an airway for convenience of explanation, here, It is described as “lumen”.

  The first lumen 12 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 is formed at the predetermined position. The tube main body 2 communicates with the outside of the tube main body 2 through a first suction port portion 12 b that penetrates to the outer peripheral surface of the tube main body 2. In addition, the 1st 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. More specifically, the first suction port portion 12b of the present embodiment is formed in the end portion of the bending portion 10 on the distal end portion 8 side, that is, in the vicinity of the proximal end portion 11 side of the cuff attachment portion 9. The first lumen 12 is a lumen for sucking and removing foreign substances X such as sputum, saliva, blood and the like stored in the trachea upstream side (jaw side) with respect to the cuff 3 in a state indwelled in the trachea. Hereinafter, it is referred to as “first lumen for suction”.

  The second lumen 13 extends from the second base end opening 13a on the base end surface to a predetermined position closer to the distal end portion 8 than the cuff 3 and the cuff mounting portion 9, and is a tube formed at the predetermined position. It communicates with the hollow portion 7 of the tube main body 2 through the second suction port portion 13 b that penetrates to the inner peripheral surface of the main body 2. In addition, the 2nd suction port part 13b of this embodiment is formed in the front-end | tip part 8 as a position of the front-end | tip part 8 side rather than the cuff 3 and the cuff mounting part 9. FIG. More specifically, the second suction port portion 13b of this embodiment is a notch-shaped suction port that continues to the position of the tip 5 on the inner peripheral surface of the tip 8 as shown in FIG. The second lumen 13 is a lumen for sucking and removing foreign substances X such as soot stored near the tip 8 on the trachea downstream side (tracheal branching portion side) with respect to the cuff 3 placed in the trachea. Hereinafter, it is referred to as “second lumen for suction”.

  The third lumen 14 extends from the third base end opening 14a 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. It communicates with the outside through 14b. Therefore, for example, using a syringe or the like, air or the like into the annular space Y defined by the outer peripheral surface of the cuff mounting portion 9 and the inner surface of the cuff 3 through the flow path 14b from the third proximal end opening 14a of the third lumen 14. The cuff 3 can be expanded in the radial direction B (see FIG. 8) by the supplied fluid. For the expanded cuff 3, if the fluid is sucked from the annular space Y through the flow path 14 b and the third proximal end opening 14 a of the third lumen 14, the cuff 3 is contracted in the radial direction B. Can be made. As described above, the third lumen 14 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 main 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 coalescence, polyester such as polyethylene terephthalate, butadiene-styrene copolymer, polyamide (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, or poly- (4-methylpentene-1) because it is easy to mold.

  1 and 8, the cuff 3 is attached on the outer peripheral surface of the cuff mounting portion 9 of the tube main body 2, and the outer peripheral surface of the cuff mounting portion 9 through the cuff lumen 14 of the tube main body 2 described above. And the pressure of the fluid supplied to the annular space Y defined by the inner surface of the cuff 3 can be expanded. 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 Y through the cuff lumen of the tube body 2 to 3 is expanded in the radial direction B of the tube body 2 (see FIG. 8). 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 by the inner peripheral surface of the trachea by the frictional force between the outer surface of the cuff 3 and the inner wall of the trachea. Blocks the trachea. 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 pulled out from the trachea or when the position where the tracheal tube 1 is placed is readjusted, the fluid in the annular space Y is sucked using the cuff lumen, and the cuff 3 is removed. Shrink. Thereby, the tube main body 2 of the tracheal tube 1 can be moved along the trachea in the trachea.

  In such a cuff 3, the end edge 15 on the proximal end 6 side and the end edge 16 on the distal end 5 side in the central axis direction A are respectively in the circumferential direction C of the tube body 2 (see FIGS. 2 and 6). In the whole area, it is bonded to the outer peripheral surface of the cuff mounting portion 9 by welding, ultrasonic bonding or the like. Thereby, the annular space Y described above is defined by the inner surface of the cuff 3 and the outer peripheral surface of the cuff mounting portion 9. More specifically, as shown in FIG. 8, the end edge 15 on the base end 6 side is bent inside the annular space Y, and a surface of the end edge 15 extending from the outer surface of the cuff 3 is formed. In the annular space Y, the cuff mounting portion 9 is bonded to the outer peripheral surface. Further, the end edge 16 on the tip 5 side is bent to the outside of the annular space Y, and the surface of the end edge 16 extending from the inner surface of the cuff 3 is outside the annular space Y, and the cuff mounting portion 9. It is adhered to the outer peripheral surface of.

  In addition, as a constituent material of the cuff 3, for example, soft polyvinyl chloride, polyurethane, polyethylene, polypropylene, polyester, ethylene-vinyl acetate copolymer (EVA), silicone, or any of these materials may be mixed. A flexible material can be used.

  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. As shown in FIGS. 1 and 9, the flange member 4 is a cylindrical tube that is fitted to the tube main body 2 when the proximal end portion 11 of the tube main body 2 is inserted and fitted to the tube main body 2. And a plate-like flange portion 18 that protrudes radially outward from the outer wall of the cylindrical portion 17 and abuts against the skin in a state where the tracheal tube 1 is indwelled. In FIG. 9, for convenience of explanation, the positions of the first suction lumen 12, the second suction lumen 13, and the cuff lumen 14 of the tube body 2 are indicated by a two-dot chain line.

  As shown in FIG. 9, the cylinder portion 17 communicates with the first suction lumen 12, the second suction lumen 13, and the cuff lumen 14, at positions proximal to the flange portion 18. In the state where the holes 17a, 17b and 17c are defined and the base end portion 11 of the tube body 2 is fitted in the cylindrical portion 17, the first suction lumen 12 and the second suction lumen are provided. 13 and the cuff lumen 14 communicate with the outside of the tracheal tube 1 through corresponding communication holes 17a, 17b, and 17c, and medical tubes are connected to the communication holes 17a to 17c, respectively.

  Specifically, the first suction lumen 12 communicates with the outside of the tracheal tube 1 on the proximal end side of the tracheal tube 1 through a corresponding communication hole 17 a formed in the cylindrical portion 17. Therefore, if suction 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 17a of the cylindrical portion 17 exposed outside the body, the first suction lumen from outside the body. The foreign matter X such as a heel can be sucked through 12. The second suction lumen 13 is the same as the first suction lumen 12, and the foreign matter X is removed through the suction tube 20, the corresponding communication hole 17 b formed in the cylindrical portion 17, and the second suction lumen 13. Can be aspirated.

  Further, the cuff lumen 13 communicates with the outside of the tracheal tube 1 on the proximal end side of the tracheal tube 1 through a corresponding communication hole 17 c formed in the cylindrical portion 17. Accordingly, if a syringe or the like is connected to the other end of the cuff tube 21 whose one end is fitted to the communication hole 17c of the cylindrical portion 17 exposed to the outside of the body, the annular space of the cuff 3 can be operated by operating the syringe or the like outside the body. The supply and suction of fluid to Y can be performed, whereby the expansion and contraction of the cuff 3 can be manipulated.

  The cylindrical portion 17 of the flange member 4 is mounted concentrically with the proximal end portion 11 of the tube main body 2, and the position of the first suction lumen 12 in the circumferential direction C of the tube main body 2, the second suction lumen. The position of 13 and the position of the cuff lumen 14 are set in the vicinity of the positions in the circumferential direction C of the corresponding communication holes 17a, 17b, and 17c of the cylindrical portion 17. Therefore, each communicating hole 17a, 17b, 17c can be shortened, and it is suppressed that the structure of the communicating holes 17a, 17b, and 17c of the cylinder part 17 becomes complicated. Further, as shown in FIG. 9, the suction tubes 19 and 20 and the cuff tube 21 are arranged in the direction in which the flange portion 18 protrudes from each communication hole 17a, 17b, 17c in the plan view of FIG. It connects so that it may extend, and it does not extend to the front-end | tip part 8 side. By connecting in this way, in a state where the tracheal tube 1 is placed in the trachea, the suction tubes 19 and 20 and the cuff tube 21 are prevented from colliding with the patient's jaw, and the tracheal tube 1 is placed. The patient's discomfort can be reduced.

  As a constituent material of the flange member 4, for example, it can be formed of the same material as that of the tube body 2.

  Hereinafter, details of the tube body 2 in the present embodiment will be further described.

[Tip 8 of tube body 2]
As shown in FIG. 6, the tube body 2 is different from the central axis O <b> 2 of the outer peripheral surface and the central axis O <b> 1 of the inner peripheral surface that defines the hollow portion 7. Specifically, in the cross section orthogonal to the central axis O1 of the inner peripheral surface as shown in FIG. 6 (in the present embodiment, excluding one cross section including the distal end surface of the tube body 2), the central axis O1 of the inner peripheral surface Is located above the central axis O2 of the outer peripheral surface, and as shown in FIG. 6, the outer peripheral surface and the inner peripheral surface are not concentric circles in the same cross section. More specifically, as shown in FIG. 6, the outer peripheral surface of the tube body 2 is positioned on the outer curved surface side (lower side in FIG. 6) of the curved portion 10 in a cross section orthogonal to the central axis O <b> 1 of the inner peripheral surface. A lower surface portion 22, an upper surface portion 23 located on the inner curved surface side (upper side in FIG. 6) of the bending portion 10, and a side surface portion 24 connecting the lower surface portion 22 and the upper surface portion 23 in the circumferential direction C of the tube body 2. The tube body 2 has a thickness T from the upper surface portion 23 side in the same cross section (in the present embodiment, the same cross section not including a portion on the upper surface portion 23 side of a tapered portion 25 described later). Also, the lower surface portion 22 side is thick. Furthermore, in this embodiment, the thickness T of the tube body 2 is configured to gradually increase from the upper surface portion 23 toward the lower surface portion 22 in the circumferential direction C in the same cross section (see FIG. 6). The “thickness T of the tube main body 2” means the thickness of the tube main body 2 on a line segment connecting the central axis O1 and one point on the outer peripheral surface.

  By making the thickness T on the lower surface portion 22 side of the tube body 2 larger than the thickness T on the upper surface portion 23 side, the first and second suction lumens 12 and 13 formed in the wall on the lower surface portion 22 side. The cross-sectional area can be made relatively large, the clogging of the foreign matter X in the first and second suction lumens 12 and 13 can be suppressed, the suction pressure required for suction can be reduced, and suction efficiency can be improved. Can be improved.

  Here, as shown in FIGS. 2 to 8 and the like, the outer peripheral surface of the distal end portion 8 of the tube body 2 is formed with a tapered portion 25 whose outer diameter gradually decreases toward the distal end 5 and extends to the distal end 5. ing. This tapered portion 25 can reduce the insertion resistance when the tube body 2 is inserted from the outside of the body into the trachea. In particular, as described above, by providing the tapered portion 25 on the outer peripheral surface of the distal end portion 8 of the tube main body 2 having a thickness T (see FIG. 6) depending on the position in the circumferential direction C, the tube main body 2 is moved from outside the body into the trachea. An increase in insertion resistance that can occur at a portion where the thickness T is thick during insertion can be suppressed. When the tube body 2 is inserted into the trachea from outside the body, for example, the skin and trachea at the throat are incised to form an insertion port, and the tube port 2 is expanded using an obturator 50 or the like described later. 2 is inserted. The obturator 50 is removed from the proximal end 6 side of the tube body 2 after the cuff 3 is expanded and the tube body 2 is placed at a predetermined position in the trachea. Further, the obturator 50 may be removed from the proximal end 6 side of the tube body 2 before the tube body 2 is placed at a predetermined position in the trachea and the cuff 3 is expanded.

  Furthermore, in the present embodiment, as shown in FIG. 8, the angle θ1 of the tapered portion 25 with respect to the central axis O1 of the inner peripheral surface of the tube body 2 is substantially the same regardless of the position in the circumferential direction C. Thereby, the insertion resistance difference in the circumferential direction C that can be generated when the angle with respect to the central axis O1 varies depending on the position in the circumferential direction C when the tube body 2 is inserted into the trachea from outside the body can be reduced.

  Furthermore, the tapered portion 25 of the present embodiment has an oblique truncated cone shape whose length in the central axis direction A at the lower surface portion 22 is longer than the length in the central axis direction A at the upper surface portion 23. Specifically, as described above, the angle θ1 of the tapered portion 25 with respect to the central axis O1 of the inner peripheral surface of the tube body 2 is substantially the same regardless of the position in the circumferential direction C (see FIG. 8). 3 (a), an ellipse formed by connecting the base end of the outer peripheral surface of the tapered portion 25 in the central axis direction A in the circumferential direction C (a solid line indicated by “M” in FIG. 3A) In the circle formed by connecting the cross section including the formed ellipse and the tip of the outer peripheral surface of the tapered portion 25 (the same as the tip of the outer peripheral surface of the tube body 2) in the circumferential direction C (in FIG. 3A) It is not parallel to a cross section including a circle formed by a solid line indicated by “N”. That is, as shown in FIG. 8, the angle θ1 of the tapered portion 25 with respect to the central axis O1 at the lower surface portion 22 and the upper surface portion 23 is the same, but the taper in the central axis direction A at the lower surface portion 22 and the upper surface portion 23. The length of the shape part 25 is different.

  Then, the length in the central axis direction A at the lower surface portion 22 is longer than the length in the central axis direction A at the upper surface portion 23, so that the tube on the lower surface portion 22 side in the portion other than the tapered portion 25. Although the thickness T (see FIG. 6) of the main body 2 is thicker than the thickness T of the tube main body 2 on the upper surface portion 23 side, the thickness T on the lower surface portion 22 side and the upper surface portion 23 side are on the distal end surface of the tube main body 2. It is possible to adopt a configuration in which the thickness difference (thickness T difference) is small or the thickness T is substantially equal. That is, since the difference in thickness due to the position in the circumferential direction C can be reduced on the distal end surface of the tube body 2, nonuniform deformation of the tube body 2 due to the difference in rigidity in the circumferential direction C, and this nonuniformity. An increase in insertion resistance due to various deformations can be suppressed.

  In particular, like the tube body 2 of the present embodiment, the thickness T of the tube body 2 at the distal end surface is made uniform regardless of the position in the circumferential direction C, and the central axis O1 of the inner circumferential surface is formed at the distal end surface of the tube body 2. It is preferable to adopt a concentric configuration in which the outer peripheral surface and the central axis O2 of the outer peripheral surface substantially coincide (see FIG. 8). In the case of such a configuration, it is particularly preferable to make the thickness T uniform at the distal end surface so as to reduce the insertion resistance at the distal end surface. Note that the thickness T of the distal end surface of the tube body 2 of the present embodiment is 0.6 mm regardless of the position in the circumferential direction C.

[First and second suction lumens 12 and 13 of the tube body 2]
Next, the positional relationship between the first suction lumen 12 (first lumen 12) and the second suction lumen 13 (second lumen 13) will be described in detail.

  As shown in FIGS. 2 to 8, the first suction lumen 12 extends in the wall of the tube body 2 along the central axis O <b> 1 of the inner peripheral surface of the tube body 2. The lumen 12 is an outer wall formed on the outer peripheral surface of the tube main body 2 from an inner wall opening 26 formed on the inner wall of the first suction lumen 12 at a position closer to the base end portion 11 than the cuff 3 and the cuff attachment portion 9. It communicates with the outside through a suction port as the first suction port portion 12 b that penetrates to the opening 27.

  Further, the second suction lumen 13 is formed in the wall of the tube main body 2 along the central axis O1 of the inner peripheral surface of the tube main body 2 from the base end 11 on the base end 11 side of the cuff 3 to the cuff 3. It extends to the tip 8 on the tip 8 side. As described above, the second suction lumen 13 communicates with the inner hollow portion 7 of the tube body 2 through the suction port as the second suction port portion 13b penetrating to the inner peripheral surface of the tube body 2. Yes.

  Here, the cross section shown in FIG. 6 is a cross section that includes the first suction lumen 12, the second suction lumen 13, and the cuff lumen 14, and is orthogonal to the central axis O1. 6 indicates a first virtual plane P1 including the central axis O1 at the positions of the distal end portion 8 and the proximal end portion 11 of the tube main body 2, and the first virtual plane P1 of the present embodiment. The virtual plane P1 is a plane including all the central axis O1 of the tube main body 2. Further, “P2” indicated by a broken line in FIG. 6 indicates a second virtual plane P2 that passes through the central axis O1 on the cross section of FIG. 6 and is orthogonal to the first virtual plane P1. Then, an intersection line between the first virtual plane P1 and the lower surface portion 22 located on the outer curved surface side of the curved portion 10 (see FIG. 2 etc.) of the outer peripheral surface of the tube main body 2 is a first intersection line L1 (FIG. 8), a point K1 shown in FIG. 6 indicates a point on the first intersection line L1. Moreover, when the intersection line which the 1st virtual plane P1 and the upper surface part 23 located in the inner curved surface side of the curved part 10 among the outer peripheral surfaces of the tube main body 2 cross is made into the 2nd intersection line L2 (refer FIG. 8). In addition, a point K2 shown in FIG. 6 indicates a point on the second intersection line L2. Furthermore, a straight line L3 indicated by a two-dot chain line in FIG. 6 is an imaginary line passing through two points constituting the maximum diameter of the first suction lumen 12 among the inner walls that define the first suction lumen 12 in this sectional view. A straight line L4 indicated by a two-dot chain line in FIG. 6 is an imaginary line passing through two points constituting the maximum diameter of the second suction lumen 13 among the inner walls that define the second suction lumen 13 in this sectional view. A line is shown. For convenience of explanation, the straight line L3 is hereinafter referred to as “first straight line L3”, and the straight line L4 is referred to as “second straight line L4”.

  As shown in FIG. 6, the second suction lumen 13 is formed at a position where the first straight line L3 does not intersect, and the first suction lumen 12 is formed at a position where the second straight line L4 does not intersect. Yes. With such a configuration, the distance in the circumferential direction C between the first suction lumen 12 and the second suction lumen 13 can be set to a predetermined distance or more, and the tube body 2 of the tracheal tube 1 is manufactured. In addition, the first suction lumen 12 and the second suction lumen 13 can be easily formed as separate lumens. Further, as shown in FIG. 10, when the outer wall opening 27 is formed on the outer peripheral surface of the tube main body 2, it is possible to prevent the formed opening from communicating with the second suction lumen 13.

  Further, as shown in FIG. 6, the second suction lumen 13 is provided on the lower surface portion 22 side of the tube body 2 and at a position intersecting the first virtual plane P1. The lower surface portion 22 of the tube body 2 is a surface on the back side when the tracheal tube 1 is indwelled in the trachea, and is a surface on the lower side in the vertical direction for a patient lying down. That is, by arranging the second suction lumen 13 on the lower surface portion 22 side, foreign matter X (such as a sputum that is easily stored on the inner surface (back surface) vertically below in the trachea of the sleeping patient. 1) can be easily sucked through the second suction lumen 13.

  Furthermore, as shown in FIG. 6, the angle θ2 formed by the first straight line L3 and the second straight line L4 is larger than 90 degrees. By adopting such a configuration, the distance in the circumferential direction C between the first suction lumen 12 and the second suction lumen 13 can be less than a predetermined distance. As described above, in the trachea of a sleeping patient, foreign substances X such as wrinkles are easily stored on the back side surface in the trachea. Accordingly, the first suction lumen 12 is also preferably located on the side of the lower surface portion 22 of the tube body 2, similarly to the second suction lumen 13. Therefore, by arranging the first suction lumen 12 and the second suction lumen 13 so that the angle θ2 formed by the first straight line L3 and the second straight line L4 in the sectional view of FIG. 6 is larger than 90 degrees, The position in the circumferential direction C of the first suction lumen 12 can be set to a position close to the second suction lumen 13 disposed at a position where the first virtual plane P1 intersects the lower surface portion 22 side.

  In other words, the first suction lumen 12 is formed at a position where the central angle is less than 90 degrees from the point K1 on the first intersection line L1 around the central axis O1 in the cross-sectional view of FIG. It is formed at a position that does not intersect the first virtual plane P1 and the second virtual plane P2. That is, in the cross section of FIG. 6, the first suction lumen 12 is formed at a position that is closer to the lower surface portion 22 than the second virtual plane P2 and does not intersect the first virtual plane P1 and the second virtual plane P2. Yes.

  In the cross-sectional view of FIG. 6, the center point R of the first suction lumen 12 on the first straight line L3 with the center axis O1 as the center has a central angle of 30 to 30 from the point K1 on the first intersection line L1. The range is preferably 80 degrees, more preferably 40 to 70 degrees, and particularly preferably 55 to 65 degrees. Further, in the cross-sectional view of FIG. 6, since the midpoint S of the second suction lumen 13 on the second straight line L4 is preferably at a position intersecting the first virtual plane P1, in the cross-sectional view of FIG. Centering on the central axis O1, the midpoint R of the first suction lumen 12 on the first straight line L3 has a central angle of 30 to 80 degrees from the midpoint S of the second suction lumen 13 on the second straight line L4. Is preferably in the range of 40 to 70 degrees, more preferably in the range of 55 to 65 degrees. However, the second suction lumen 13 only needs to be positioned on the lower surface portion 22 side, and as shown in FIG. 6, the midpoint S of the second suction lumen 13 is not positioned on the first virtual plane P1. It may be a configuration.

  Further, in the cross section including the first suction lumen 12 and the second suction lumen 13 and perpendicular to the central axis O1, as shown in FIG. 6, the first suction lumen 12 and the second suction lumen 13 are substantially elliptical. have. Accordingly, the first straight line L3 in the present embodiment is the long axis of the first suction lumen 12 and its extension line, and the second straight line L4 in the present embodiment is the long axis of the second suction lumen 13 and This is an extension.

  In addition, in the cross section including the first suction lumen 12, the second suction lumen 13, and the cuff lumen 14 as shown in FIG. 6 and orthogonal to the central axis O 1, the cuff lumen 14 is also the outer periphery of the tube body 2. It is formed at a position intersecting the first virtual plane P1 on the upper surface portion 23 side of the surface. That is, in the cross-sectional view shown in FIG. 6, the second suction lumen 13 and the cuff lumen 14 are formed at substantially opposing positions across the central axis O1.

[First suction port portion 12b of the first suction lumen 12]
Next, the details of the suction port as the first suction port portion 12b of the first suction lumen 12 will be described. As shown in FIGS. 2, 4 (a) and 5 (b), the first suction port portion 12 b is formed on the inner wall of the first suction lumen 12 at a position closer to the base end portion 11 than the cuff 3. The suction port penetrates from the inner wall opening 26 to the outer wall opening 27 formed on the outer peripheral surface of the tube body 2.

  FIG. 10 shows a cross section perpendicular to the central axis O1 and including the inner wall opening 26. As shown in FIG. 10, the inner wall opening 26 passes through the central axis O1 on the cross section shown in FIG. 10 and is orthogonal to the first virtual plane P1, like the first suction lumen 12 in FIG. The first virtual plane P1 and the second virtual plane P2 on the lower surface 22 side located on the outer curved surface side of the curved portion 10 (see FIG. 2 and the like) of the outer peripheral surface of the tube body 2 relative to the virtual plane P2. It is formed at a position where it does not intersect. Accordingly, foreign substances X such as wrinkles that are easily stored on the inner surface on the back side in the trachea can be easily sucked through the inner wall opening 26 and the first suction lumen 12.

  Furthermore, in the cross section shown in FIG. 10, the position of the midpoint W in the circumferential direction of the inner wall opening 26 is the same as the midpoint R of the first suction lumen 12 on the first straight line L3 in FIG. Centering on the central axis O1 on the cross section shown in FIG. 10, the central angle is preferably in the range of 30 to 80 degrees from the point K1 on the first intersection line L1, and more preferably in the range of 40 to 70 degrees. A range of 55 to 65 degrees is preferable, and it is particularly preferable.

  Further, when the suction port as the first suction port portion 12b is viewed from the outside of the outer peripheral surface of the tube body 2 to the front, the inner wall opening 26 has a substantially rectangular shape as shown in FIG. The outer wall opening 27 is substantially elliptical. More specifically, the inner wall opening 26 has a substantially rectangular shape, and the outer wall opening 27 has a substantially elliptical shape in which the major axis direction is not parallel to the central axis direction A and is substantially orthogonal. Such shapes of the inner wall opening 26 and the outer wall opening 27 are formed by forming a suction port as the first suction port portion 12 b as a groove formed in the outer wall of the tube body 2. Specifically, the groove forming the suction port extends in a straight line not along the circumferential direction C of the tube body 2 in a direction not parallel to the central axis O1. And as shown in FIG. 2, the groove | channel which forms a suction opening is circular arc shape with the uniform cross section of a groove | channel inner surface. And the edge of the groove defines an outer wall opening 27 having a substantially elliptical shape, and a part of an arc-shaped curved surface having a uniform cross section inside the groove defines a substantially rectangular inner wall opening 26. In other words, the groove forming the suction port has a cylindrical outer peripheral surface receiving shape imitated by pressing the outer peripheral surface of the cylindrical member against the outer peripheral surface of the tube body 2.

  In this way, the suction port as the first suction port portion 12b is configured by a groove extending linearly in the direction not parallel to the central axis O1 and not along the circumferential direction C of the tube body 2, so that during suction. It is possible to prevent the inner surface of the trachea from coming into close contact with the inner wall opening 26.

  FIG. 11 shows a modification of the suction port as the first suction port portion 12b. The suction port as the first suction port portion 12b shown in FIG. 4A is constituted by a groove extending in a direction substantially orthogonal to the central axis O1, but the first suction port portion shown in FIG. The suction port 12b is configured by a groove that is not parallel to the central axis O1 and extends in a direction that is not orthogonal. By forming a suction port as the first suction port portion 12b by such a groove, the inner wall opening 26 is formed in a substantially parallelogram shape when viewed from the outside of the outer peripheral surface of the tube body 2 to the front. It is possible to make it easy to suck sputum, saliva and the like due to the influence of surface tension and the like.

  Further, in FIG. 11, a plurality of convex portions 40 are provided on the inner surface of the groove constituting the suction port as the first suction port portion 12 b, and an uneven shape is formed. By forming such a concavo-convex shape on the inner surface of the groove, it is possible to further prevent the inner surface of the trachea from closely contacting the inner wall opening 26 during suction.

  Furthermore, in FIG. 11, the suction port as the first suction port portion 12 b is formed at the position of the bending portion 10 in the central axis direction A. And when forming the suction port as the 1st suction port part 12b in the curved part 10, it is beneficial to comprise by the groove | channel extended in the direction which is not parallel to the central axis O1 and is not orthogonal. That is, if the suction port as the first suction port portion 12b is configured by a groove that is not parallel to the central axis O1 and extends in a direction that is not orthogonal, and the groove is formed at the position of the curved portion 10, the inner wall opening 26 may have a substantially parallelogram shape having a diagonal line that is long in the vertical direction. Therefore, compared to the case where a groove extending in a direction orthogonal to the central axis O1 is formed at the position of the bending portion 10, the lower end position of the inner wall opening 26 can be set on the lower surface portion 22 side. When 2 is placed in the trachea, sputum, saliva and the like stored on the inner surface on the back side in the trachea can be easily sucked.

  As described above, the suction port as the first suction port portion 12b sucks foreign matter X (see FIG. 1) such as sputum and saliva stored near the proximal end 6 side of the cuff 3 of the tracheal tube 1. In the central axis direction A, it is particularly preferable that the cuff 3 and the cuff mounting portion 9 are in a position in the vicinity of the base end 6 side.

[Method of manufacturing tracheal tube 1]
Next, a method for manufacturing the tracheal tube 1 of the present embodiment will be described. FIG. 12 is a flowchart showing the procedure of the method for manufacturing the tube main body 2 in the method for manufacturing the tracheal tube 1. As shown in FIG. 12, the manufacturing method of the tube main body 2 of the tracheal tube 1 defines the hollow portion 7 penetrating from the distal end 5 to the proximal end 6, and the first suction lumen 12 as two lumens in the wall and Step S1 for extruding the tube material having the second suction lumen 13; Step S2 for adhering the cuff 3 to the outer peripheral surface of the extruded tube material; and a taper shape at the tip of the tube material. A step S3 of pressing a mold having an inner surface to form a tapered portion 25 whose outer diameter gradually decreases toward the tip and extends to the tip on the outer peripheral surface of the tip of the tube material; A blade such as a feather blade is inserted through the opening, and the tip of the second suction lumen 13 is located on the inner peripheral surface at the position where the tapered portion 25 of the outer peripheral surface is formed. That a step S4 of forming a groove in a position, in the proximal position near the cuff attachment portion of the tubing, is intended to include the step S5 that the tip forms a first suction port portion 12b by a circular blade or the like, the.

  In step S3 for forming the tapered portion 25 described above, the end edge 16 on the distal end 5 side of the tube material of the cuff 3 is sandwiched between the inner surface of the mold and the outer peripheral surface of the tube material. Melt part. Thereby, the edge part 16 of the melted cuff 3 is melted, and the adhesive force between the edge part 16 of the cuff 3 and the outer peripheral surface of the cuff mounting part 9 can be further strengthened.

  Further, the second suction port portion 13b of the second suction lumen 13 described above is formed by the groove formed in step S4 for forming a groove on the inner peripheral surface that defines the distal end portion of the second suction lumen 13 (see FIG. 7). ) Is formed. In the manufacturing method described above, the groove is formed by cutting off a part of the inner wall using a cutter, but any cutout member that can form a groove by cutting out a part of the inner wall may be used. It is not limited to. Further, in the manufacturing method described above, also in step S5 for forming the first suction port portion 12b, a cutting tool having a circular tip or a cutting tool having a U-shaped tip such as a round sword is used as shown in FIG. Although the groove-shaped first suction port portion 12b as shown in FIG. 10 or the like is formed, a notch capable of forming a groove-shaped first suction port portion 12b by cutting out a part of the outer wall of the tube material. Any member may be used, and the blade is not limited to the above-described blade.

  In addition, about each step of the manufacturing method of the tracheal tube 1 other than the manufacturing method of the tube main body 2, it can implement | achieve using a well-known various method, Description is abbreviate | omitted here.

[Tracheal tube set 100]
Finally, a tracheal tube set 100 including the above-described tracheal tube 1 and an obturator 50 inserted into the trachea from outside the body together with the tube main body 2 will be described.

  FIG. 13 is a cross-sectional view of the tracheal tube set 100. As shown in FIG. 13, the tracheal tube set 100 is inserted into the trachea from outside the body together with the tracheal tube 1 with the tracheal tube 1 including the tube main body 2 and the distal end protruding from the distal end opening 28 of the tube main body 2. The obturator 50 is provided.

  The distal end of the obturator 50 is inserted into an insertion port formed in the skin and trachea before the distal end 5 of the tube body 2 of the tracheal tube 1. Then, the insertion port is expanded by the obturator 50 to facilitate the insertion of the tube body 2 into the trachea.

  When the obturator 50 is inserted into the tube body 2 in the tracheal tube 1, the amount of insertion of the obturator 50 into the tracheal tube 1 in the central axis direction A of the inner peripheral surface of the tube body 2 is engaged with the obturator 50. An engagement portion 29 is provided to restrict the movement.

  Specifically, the engagement portion 29 of the tracheal tube 1 shown in FIG. 13 is a proximal end surface of the cylindrical portion 17 of the flange member 4, and the obturator 50 is connected to the tube from the proximal end 6 (see FIG. 2 etc.) side of the tube body 2. As it is inserted into the main body 2, the flange portion 52 provided at the proximal end portion 51 of the obturator 50 comes into contact with the proximal end surface of the cylindrical portion 17 in the flange member 4 of the tracheal tube 1, and the obturator 50 is inserted further. Can not do. That is, the amount of insertion of the obturator 50 into the tracheal tube 1 is regulated by the proximal end surface of the cylindrical portion 17 in the flange member 4 of the tracheal tube 1. The engaging portion is not limited to that shown in FIG. 13. For example, a female screw portion is provided on the inner surface of the cylindrical portion 17 of the flange member 4, and a male screw portion is provided on the outer surface of the proximal end portion 51 of the obturator 50. The tracheal tube 1 and the obturator 50 may be engaged with each other by screwing the female screw portion and the male screw portion.

  As described above, the outer peripheral surface of the distal end portion 8 of the tube body 2 is formed with the tapered portion 25 extending to the distal end 5 whose outer diameter gradually decreases toward the distal end 5 (see FIG. 2 and the like). . In addition, a tapered portion 54 whose outer diameter gradually decreases toward the tip is formed on the outer peripheral surface of the tip 53 of the obturator 50. Hereinafter, in order to distinguish between the tapered portion 25 of the tube body 2 and the tapered portion 54 of the obturator 50, the tapered portion 25 of the tube body 2 is referred to as a “first tapered portion 25”. The tapered portion 54 is referred to as a “second tapered portion 54”.

  In a state where the obturator 50 is engaged with the engaging portion 29, at least a part of the second tapered portion 54 is exposed outward from the distal end opening 28 of the tube main body 2, and in the central axis direction A, the tube main body 2. The first tapered portion 25 and the second tapered portion 54 of the obturator 50 are continuously located. By setting it as such a structure, the insertion resistance in the front-end | tip 5 of the tube main body 2 at the time of inserting in a trachea from the outside body can be reduced.

  In FIG. 13, the angle θ <b> 1 of the first tapered portion 25 with respect to the central axis direction A is larger than the angle θ <b> 3 of the second tapered portion 54. Note that the angle θ1 of the first taper-shaped portion 25 with respect to the central axis direction A can be smaller than the angle θ3 of the second taper-shaped portion 54 or can be set to an approximately equal angle, as shown in FIG. Furthermore, by making the angle θ1 of the first tapered portion 25 larger than the angle θ3 of the second tapered portion 54, the insertion resistance at the distal end 5 of the tube body 2 can be reduced, which is more preferable. Further, by making the angle θ1 of the first taper-shaped portion 25 substantially equal to the angle θ3 of the second taper-shaped portion 54, the tip 5 of the tube body 2 and the obturator 50 have a substantially integrated structure, and The insertion resistance can also be reduced. Further, by making the angle θ1 of the first taper-shaped portion 25 smaller than the angle θ3 of the second taper-shaped portion 54, the distal end 5 of the tube body 2 and the obturator 50 are excessively inserted into the tracheal inner wall. Damage can be reduced.

  Furthermore, the tube main body 2 includes a distal end surface including an edge portion 30 that defines the distal end opening 28, and in a state where the obturator 50 is engaged with the engaging portion 29, the outer peripheral surface of the second tapered portion 54 is a tube. It fits and contacts the edge 30 of the main body 2. That is, the outer peripheral surface of the second tapered portion 54 is in contact with the edge 30 over the entire area in the circumferential direction C. By adopting such a configuration, the step in the radial direction B between the first taper-shaped portion 25 and the second taper-shaped portion 54 is only the thickness T (see FIG. 6) at the distal end surface of the tube body 2. The insertion resistance at the distal end 5 of the tube main body 2 can be reduced as compared with the configuration in which the outer peripheral surface of the second tapered portion 54 is not in contact with the edge 30 of the tube main body 2 in the entire circumferential direction C. be able to.

  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, in the tube body 2 described above, the distal end portion 8, the cuff attachment portion 9, and the proximal end portion 11 are straight cylindrical portions that are not curved. However, the tube body 2 may be curved from the distal end portion to the proximal end portion. it can.

  Furthermore, as shown in FIG. 6, the midpoint S of the second suction lumen 13 on the second straight line L4 in the tube body 2 described above is not located on the first virtual plane P1, and the side surface 24 If the midpoint S is located on the first virtual plane P1 in the cross-sectional view of FIG. 6, foreign substances X such as wrinkles that are easily stored on the inner surface on the back side in the trachea are present. Since it is easy to be sucked through the second suction lumen 13, such an arrangement is more preferable. Further, as shown in FIG. 6, in the tube body 2 described above, the midpoint S of the second suction lumen 13 on the second straight line L4 is not positioned on the first virtual plane P1. Even if it exists, as shown in FIG. 14, if the suction port as the second suction port portion 13b is formed at a position close to the point K1 on the first intersection line L1, the foreign matter X is easily sucked. It can be configured. 14 shows a cross section at the same position as FIG. 7. In this cross sectional view, the third through two points constituting the maximum diameter of the suction port among the suction ports as the second suction port portion 13b. The suction port as the second suction port portion 13b is arranged so that the midpoint U of the suction port on the straight line L5 (virtual line) is located on the first virtual plane P1.

  The present invention relates to a tracheal tube.

1: Tracheal tube 2: Tube body 3: Cuff 4: Flange member 5: Tip of tube body 6: Base end of tube body 7: Hollow part 8: Tip part of tube body 9: Cuff mounting part 10 of tube body: Tube Curved portion 11 of main body: Base end portion 12 of tube main body: First suction lumen (first lumen)
12a: first base end opening 12b: first suction port (suction port)
13: Second suction lumen (second lumen)
13a: second base end opening 13b: second suction port (suction port)
14: Cuff lumen (third lumen)
14a: third base end opening 14b: flow path 15: base end side edge portion 16: tip end side edge portion 17: tube portions 17a to 17c: communication holes 18: flange portions 19, 20: suction tube ( Medical tube)
21: Tube for cuff (medical tube)
22: Lower surface portion 23: Upper surface portion 24: Side surface portion 25: First tapered shape portion (tapered shape portion)
26: inner wall opening 27: outer wall opening 28: distal end opening 29: engagement portion 30: edge 40: convex portion 50: obturator 51: proximal end portion 52 of the obturator 53: flange portion 53: distal end portion 54 of the obturator: second taper Shaped part (tapered part)
A: Direction of central axis of inner peripheral surface of tube body B: Radial direction of tube body C: Circumferential direction of tube body K1: Point on first intersection line K2: Point on second intersection line L1: First intersection line L2 : Second intersection line L3: first straight line (virtual line)
L4: Second straight line (virtual line)
L5: 3rd straight line (virtual line)
M: Line connecting the proximal end of the tapered portion in the circumferential direction N: Line connecting the distal end of the tapered portion in the circumferential direction O1: Center axis line O2 of the inner peripheral surface of the tube body P2: Center axis line P1 of the outer peripheral surface of the tube body First virtual plane P2: Second virtual plane R: Midpoint S of the first suction lumen on the first straight line: Midpoint T of the second suction lumen on the second straight line: Thickness U of the tube body U: Third Middle point X of the second suction port on the straight line: Foreign matter Y: Annular space W: Midpoint θ in the circumferential direction of the inner wall opening θ1: Angle of the tapered portion of the tube body with respect to the central axis θ2: First straight line and second straight line Angle θ3 between the angle of the tapered portion of the obturator with respect to the central axis

Claims (6)

A tracheal tube comprising a tube body in which a distal end portion and a proximal end portion are connected via a bending portion, and a contractible and expandable cuff attached on the outer peripheral surface of the tube body,
A first lumen and a second lumen are defined in the wall of the tube body,
The first lumen communicates with the outside of the tube body through a first suction port that penetrates to the outer peripheral surface formed at a position closer to the base end than the cuff.
The second lumen communicates with the inside of the tube body through a second suction port that penetrates to an inner peripheral surface formed at a position closer to the tip than the cuff,
When the plane including the central axis of the inner peripheral surface of the tube body at the position of the distal end portion and the proximal end portion is a first virtual plane, the first lumen and the second lumen are the first lumen In the cross section that includes the lumen and the second lumen and is orthogonal to the central axis, the outer peripheral surface of the tube body is more than the second virtual plane that passes through the central axis on the cross section and is orthogonal to the first virtual plane. It is formed on the lower surface side located on the outer curved surface side of the curved portion,
In the cross section, the second lumen is formed at a position where a first straight line passing through two points constituting the maximum diameter of the first lumen does not intersect among the inner walls defining the first lumen, One lumen is formed in a position where a second straight line passing through two points constituting the maximum diameter of the second lumen does not intersect among inner walls defining the second lumen.   The tracheal tube according to claim 1, wherein an angle formed by the first straight line and the second straight line is greater than 90 in the cross section.   In the cross section, with the central axis as the center, the midpoint of the first lumen on the first straight line is within a range of 30 to 80 degrees from the midpoint of the second lumen on the second straight line. The tracheal tube according to claim 1 or 2, wherein the tracheal tube is provided.   The tracheal tube according to claim 3, wherein the central angle is in a range of 40 to 70 degrees.   The tracheal tube according to claim 4, wherein the central angle is in the range of 55 to 65 degrees.   The tracheal tube according to any one of claims 1 to 5, wherein the second lumen is formed at a position intersecting the first virtual plane.

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