JP2003135590A - Medical tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainage catheter (drainage tube) capable of efficiently discharging body fluid such as bile. SOLUTION: A loop part 22 is formed at the end 21a of the drainage tube 21 and a plurality of side holes 23a are provided in a surface formed by the loop. A plurality of side holes 23b are also provided in predetermined longitudinally spaced relationship on a side face of the tube at an adjacent portion 30 adjacent to the loop part 22. The adjacent portion 30 is provided with a length corresponding to the bile duct, with the position of the side hole 23b therein being varied 90 deg. in rotation direction relative to the axis 25 of the tube. When the drainage tube 21 is indwelling in the bile duct 11, the loop part 22 is located on the side 11a of the bile duct 11 upstream of a stricture 16 and is hooked thereto, with the adjacent portion 30 located on the downstream side 11b of the stricture 16, so that, as bile 20 from the loop part 22 flows into the tube, bile 20 existing on the downstream side 11b also flows into the tube from the adjacent portion 30, resulting in increased efficiency for discharging the bile 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical tube, for example, a medical tube which is inserted endoscopically into a bile duct or the like and used for discharging bile or the like.

[0002]

2. Description of the Related Art When a stenosis occurs in a body cavity such as a bile duct, the drainage of bodily fluid such as bile is hindered. Therefore, a drainage tube (hereinafter sometimes referred to as a drainage catheter) is inserted into the bile duct and placed therein. The endoscopic nasal biliary drainage (ENBD) is a known treatment method for draining bile by using an endoscope and inserting a drainage tube nasally to drain bile. ing. (For example, see Japanese Utility Model Laid-Open No. 5-65349)

In addition, an endoscopic biliary drainage method (ERBD: endoscopic retrograde biliary draina) is performed in which a drainage tube is inserted into the stenosis, left in place and left to form a biliary tract, and bile is discharged through this tube.
ge) is known. (Actual No. 60-180442,
(See Japanese Utility Model Laid-Open No. 63-22934)

[0004] However, since this type of drainage catheter is placed in the bile duct, movement of the internal organs of the patient, for example, peristalsis of the stomach, causes the catheter placed in the bile duct to move out of the bile duct, resulting in the patient's condition. May be exacerbated and there is a need for means to prevent the catheter from exiting the bile duct.

Therefore, in the one disclosed in Japanese Utility Model Laid-Open No. 2-65937, a catheter (ERB) left indwelling is left.
The end of D tube) is formed into a loop (pigtail)
By doing so, the indwelling property in the bile duct is improved, and bile or the like is discharged from a plurality of side holes provided in the loop-shaped portion.

[0006] In Japanese Utility Model Laid-Open No. 5-65349, as shown in FIG. 9, a loop is formed at the tip of a catheter used for endoscopic transnasal biliary drainage (ENBD). It is designed to prevent escape from the bile duct.

That is, as shown in FIG. 9, the catheter 1 has a first curved portion 4 having an obtuse angle and an acute angle opposite to the first curved portion 4 from a proximal end portion 2 toward a distal end portion 3. The second bending portion 5 that bends in an inward direction and the third bending portion 6 that bends in an opposite direction to the first bending portion 4 at an acute angle are formed, and the tube between the third bending portion 6 and the distal end portion 3 is formed. X-shaped crosses are formed to form a loop 15 on the tip portion 3, and a plurality of side holes 7 are formed on the loop portion 15.
Is provided.

Then, as shown in FIGS. 10 and 11,
In this catheter 1, a guide wire (not shown) is inserted into the catheter 1 to make the loop portion 15 linear,
First, an endoscope (not shown) is orally introduced to the duodenum 10, the catheter 1 is introduced to the duodenum 10 through the insertion channel of the endoscope, and the loop portion 15 at the tip thereof is inserted into the narrowed portion 16 in the bile duct 11. To the upstream portion 11a (at this time, the valve at the entrance of the bile duct is cut), and the third
The curved portion 6 is positioned on the duodenal papilla 12. In this state, the guide wire is pulled out from the catheter 1 and the endoscope is pulled out from the body.

As a result, as shown in FIG. 11 (schematic enlarged cross-sectional view of the bile duct), the loop portion 15 at the distal end of the catheter 1 which has been linear by the guide wire is located at the upstream side 11a of the stenosis portion 16. As shown in the figure, it is restored to a loop shape and becomes difficult to come out of the bile duct 11. Therefore, the bile 20 flows into the catheter 1 through the side hole 7 provided in the loop portion 15, is guided in the direction of the arrow indicated by the broken line, and is discharged out of the body.

[0010]

However, as described above, a plurality of side holes 7 are provided in a concentrated manner only in the loop portion 15, and the diameter of the side holes 7 is about 1 mm. Since the size and number of the side holes 7 are limited due to the strength of the tube, there is a limit in discharging the bile 20. Also,
When the drainage catheter 1 having the loop portion 15 is inserted into the endoscope, the drainage catheter 1 is stretched linearly using a guide wire, and therefore there is a risk of kinking if the number of the side holes 7 is excessively large.

Therefore, an object of the present invention is to provide a medical tube capable of efficiently discharging bodily fluid such as bile.

[0012]

That is, according to the present invention, in a medical tube which is inserted into a predetermined position in a living body and is used for guiding body fluid at this insertion position, at least one end of the tube body is provided. At least one first body fluid passage hole is provided on the side surface, and at least one second body fluid passage hole is provided at a position adjacent to the end of the tube body, for medical use. It relates to tubes.

According to the medical tubing of the present invention, at least one first body fluid passage hole is provided on the side surface of at least one end portion, and at least one second body fluid passage hole is provided at a position adjacent to this end portion. Since the holes are provided, the bodily fluid flows into the tube from the second bodily fluid flowing hole as well as the first bodily fluid flowing hole, so that the bodily fluid discharging efficiency can be improved. As a result, even if the diameter of each bodily fluid circulation hole is formed small, a sufficient amount of drainage can be secured, and the reduction in the strength of the tube can be prevented by reducing the diameter of the circulation hole.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below.

In the medical tube of the present invention described above, it is desirable that the end portion is formed in a loop shape because it is easily hooked on, for example, a narrowed portion of the bile duct. Further, in order to improve the insertability into the body, the tip may be formed in a taper or spherical shape, and a spherical plug may be provided at the tip.

The tip of the tube body is formed into a loop having a predetermined length, and a plurality of the first bodily fluid circulation holes (for example, circular) are provided on the surface formed by the loop, and the second bodily fluid circulation is performed. A plurality (for example, 8 to 12) of holes (for example, circles) are provided at a predetermined angle (for example, 90 °) with respect to the axis of the tube body, and are displaced from each other in the longitudinal direction of the tube body. It is desirable to be provided at the position because the tube strength can be maintained and bodily fluid can easily evenly flow into the flow holes.

In this case, the second bodily fluid circulation hole is provided over a length corresponding to the bile duct (corresponding to a general length of 8.5 to 10 cm between the duodenal papilla and the duodenal bulb). Is desirable.

Further, it is desirable that a contrast material is provided at the end portion so that the position of the contrast material can be confirmed by X-ray when the tube is inserted into the target site in the body. In this case, the contrast material may be outside or inside the tube, and the contrast material may be contained in the entire tube material or may be contained only in a necessary portion.

The material that can be used for the medical tube described above is a flexible material, and examples thereof include a polymer elastomer material and a flexible synthetic resin material. Examples of the polymer elastomer material include natural rubber and synthetic rubber, such as propylene rubber, urethane rubber, silicone rubber, and fluororubber. Examples of the flexible synthetic resin material include polyethylene, soft vinyl chloride resin, polyamide resin, polyurethane resin, saturated polyester resin, fluororesin and the like. Of the above polymer elastomers, silicone rubber is preferable, and the flexible synthetic resin material is polyethylene or fluororesin.

As the vinyl chloride resin, a vinyl chloride homopolymer, polyvinylidene chloride, vinyl chloride containing 90 mol% or more, preferably 95 mol% or more of vinyl chloride and another copolymerizable monomer are used. There are copolymers and the like. Examples of the polyamide resin include nylon 6, nylon 66, nylon 610, nylon 11, nylon 12, and N-alkoxymethyl modified nylon. As the polyurethane resin, a so-called prepolymer based on linear polyester, polyether or polyesteramide, which is reacted with diisocyanate to form a prepolymer, polymerized by a chain extender and cured by heat or an appropriate crosslinking agent. Method, or by mixing the polyol, diisocyanate, chain extender, and crosslinking agent at the same time,
There is a one-shot method and a segmented polyurethane produced by Examples of the saturated polyester include thermoplastic polyethylene terephthalate and polybutylene terephthalate.

Examples of the fluororesin include fluorinated ethylene-polypropylene copolymer (FEP), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) and tetrafluoroethylene-ethylene copolymer (ETFE).

Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

As a result of extensive studies by the present inventor, the medical tube of the present invention uses a drainage catheter as a medical tube, and when several side holes are provided in a portion to be inserted into the bile duct, bile The present invention is based on the finding that the can be efficiently discharged, and is applied to a drainage catheter used in an endoscopic transnasal biliary drainage method (ENBD) and an endoscopic biliary drainage method (ERBD). Therefore, the embodiment will be described separately for ENBD and ERBD.

Embodiment 1 This embodiment is an endoscopic transnasal biliary drainage method (EN).
Drainage catheter used for BD (hereinafter referred to as ENBD
It is called a tube. ), FIG. 1A is a schematic side view with a part thereof omitted, and FIG. 1B is an enlarged cross-sectional view taken along the line bb of FIG. 1A.

As shown in FIG. 1, the ENBD tube 21 has, for example, a tube size of 6 Fr (outer diameter φ1.9 m).
m, inner diameter φ1.25 mm) and is made of a polymer elastomer material (for example, fluororesin (FEP)) and has elasticity and flexibility. The tip portion 21a of the main body 21A is formed as the loop portion 22,
A plurality of side holes 23a as first circulation holes are provided on the surface formed by the loop, and a plurality of side holes 23b as second circulation holes are also provided on the tube side surface of the adjacent portion 30 adjacent to the loop portion 22. Is provided.

[0026] Then, as shown in FIG. 1 (a), the side hole 23b of the adjacent unit 30, the position of L ₁ ~L ₈ from the side hole 23a of the opposite end to the distal end of the loop portion 22, 10 mm respectively
As shown in FIG. 1 (b), the side holes 23b are spaced apart from each other with respect to the axis 25 of the tube.
As shown in FIG. 3, the tubes are formed in the length direction of the tube at intervals of 10 mm at positions rotated by an angle α in any rotation direction, and the angle α is appropriately selected within the range of 0 <α ≦ 90 °.
This is a noteworthy feature of this embodiment.

In the case of the above-mentioned known examples (Japanese Utility Model Laid-Open No. 2-65937 and Japanese Utility Model Laid-Open No. 5-65349, etc.), the inner diameter of the side holes is about 1 mm and 4 to 6 are provided. In the case of the above configuration, the inner diameter of each of the side holes 23a and 23b is about 30% smaller than that of the known example (that is, about 0.7 m).
m) formed and many are provided.

That is, in the known example, since the side holes are provided in a limited area only in the loop portion, the number of side holes is limited in view of the strength of the tube, and in order to compensate for this, the maximum size of side holes is provided. However, as shown in FIG. 11, the bile duct 1
Although the bile 20 existing on the downstream side 11b of 1 cannot be discharged, in the present embodiment, the side hole 23b is formed not only in the side hole 23a of the loop portion 22 but also in the adjacent portion 30 thereof. Therefore, the bile 20 existing on the downstream side 11b of the bile duct 11 is also discharged, and even if the inner diameter of the side hole is reduced, the frontage area of the side hole is sufficiently secured, a sufficient drainage effect is obtained, and the inner diameter of the side hole is also obtained. Has a large effect of retaining the strength of the tube.

The adjacent portion 30 provided with the side hole 23b has a length and a side hole 23b provided therein so as to correspond to the length between the duodenal papilla and the duodenal bulb.
The number of adjacent holes 30 and side holes 23
The number of b, the angle, and the interval are not limited to the above, and can be appropriately determined. However, if the side holes 23b are provided in a portion longer than the adjacent portion 30, bile will leak out of the bile duct, so about 8 to 12 are realistic, and the angle thereof is also the number of the side holes 23b. It is preferable to determine the balance, for example, in the range of 45 ° to 90 °.

In addition, as shown in FIG.
The BD tube 21 is provided with a contrast part 24 at the tip 21a, and the ENBD tube 2 is provided at a target site in the body.
When inserting 1, the position of the contrast part 24 can be confirmed by X-ray. The contrast portion 24 is a ring-shaped metal (for example, stainless steel) externally fitted to the ENBD tube 21, but may be provided inside the tube. For example, a contrast agent such as bismuth may be contained to form the tube. Well,
You may make it contain only in a required part. Further, in order to enhance the insertability, the tip of the tube may be tapered and the tip of the stopper may be spherical.

FIG. 2 is a schematic view of the state where the ENBD tube 21 of this embodiment is inserted into the body, showing a state in which the distal end portion 21a of the tube is inserted into the bile duct 11 in order to discharge the bile 20. There is.

As shown, this ENBD tube 21
After inserting the guide wire 26 from the proximal end portion 21b side and linearly extending the loop portion 22 of the distal end portion 21a in advance, the bile duct 11 which is a target site in the body transendoscopically is inserted.
It is inserted inside. That is, the bile duct 1 is inserted together with the guide wire 26 into the treatment instrument insertion channel 28 of the endoscope 27.
In the narrowed portion 16 of No. 1, the end portion 21a of the ENBD tube 21
And then pulling out only the guide wire 26 toward the proximal side, the loop portion 22 at the tip of the tube is restored, and FIG.
Then, the loop portion 22 is formed as shown by an imaginary line, and the loop portion 22 is placed on the upstream side 11a of the narrowed portion 16. Note that reference numeral 19 in the figure indicates a flow path of pancreatic juice.

When the guide wire 26 is inserted through the tube 21 as described above, the side holes 23b of the adjacent portion 30 are provided at positions rotated by 90 ° in the linear portions, respectively, and the diameter of the hole is small. It is not damaged by the wire 26, and the side hole 23 of the loop portion 22 is
Since a is also provided on the loop surface, the guide wire 2
Since the tip of 6 does not get caught and the diameter of the hole is small even when it is pushed and extended by the guide wire 26, there is no kinking or buckling even if there is local tension or compression, and the tube It is possible to avoid damaging the strength of the.

Next, by pulling out the endoscope 27 from the outside of the body, as shown in FIG. 3, only the ENBD tube 21 is prevented from coming off with the loop portion 22 at the tip thereof being hooked on the narrowed portion 16, It is placed on the upstream side 11a of the bile duct 11. Therefore, as shown in FIG. 3, the side hole 23a of the loop portion 22 is located on the upstream side 11a of the narrowed portion 16, and the adjacent portion 3
The side hole 23b of 0 is located on the downstream side 11b of the bile duct 11, and the narrow hole 16b is extended from the side hole 23a of the loop portion 22.
The bile 20 existing on the downstream side 11b flows into the bile 20 on the more upstream side from the side hole 23b of the adjacent portion 30, and the bile duct 20 shown in FIG.
It is discharged to the outside of the body via 1.

The bile 20 is excreted through the bile duct 11 into the duodenum 10 and helps absorption of nutrients from food. However, when the stricture 16 is formed in the bile duct 11, normal excretion of the bile 20 into the duodenum is inhibited. It Therefore, for the treatment and the like, the tip of the ENBD tube 21 is inserted into the bile duct 11 and left indwelling, and during treatment, the bile 20 is used to be discharged to the outside of the body.

However, the amount of bile 20 excreted per day is large (about 700 to 100 ml), and although it is a stenosis, EN
The bile 20 flows into the downstream side 11b of the bile duct 11 from a slight gap of the narrowed portion 16 through which the BD tube 21 is inserted, and easily accumulates there. Therefore, by providing the side hole 23b also in the adjacent portion 30 located on the downstream side 11b as in the present embodiment, as shown in FIG. 4, the bile 20 accumulated on the downstream side 11b can also be discharged. It is possible to improve the discharge efficiency.

FIG. 5 shows an example of how the ENBD tube of this embodiment is used. That is, in the ENBD tube 21 placed in the bile duct as described above, the loop portion 22 at the tip thereof is hooked at the stenosis portion, and the tube body is passed from the nostril 34 via the duodenum 10-the stomach 32-the esophagus 33. After being exposed to the outside and once fixed to the cheek 35 with tape or the like, the base end 21b is placed in the container 37 by being hooked on the ear 36. Therefore,
Bile 20 introduced into the ENBD tube 21 from the bile duct is discharged into the container 37.

As described above, according to this embodiment, E
The end portion 21a of the NBD tube 21 is formed as a loop portion 22, side holes 23a are provided at predetermined intervals on the surface formed by the loop, and the adjacent portion 30 adjacent to the loop portion 22 is formed.
Also, the side holes 23b are provided at predetermined intervals, and in a state where the ENBD tube 21 is left in the bile duct 11, the loop portion 22 is located on the upstream side 11a of the stenotic portion 16 of the bile duct 11,
Since the adjacent portion 30 is located on the downstream side 11b of the bile duct 11 and the bile 20 is discharged from the side holes 23a and 23b, the same type of conventional example described above (Actual No. 5-65349).
It is possible to improve the discharge efficiency of the bile 20 as compared with.

Moreover, the side hole 23b of the adjacent portion 30 forms a predetermined angle in the rotational direction with respect to the axis 25 of the tube,
Since the position is shifted in the length direction, the downstream side 11
bile 20 existing in b is easily introduced evenly,
There is no hindrance when inserting the guide wire 26, and since the inner diameters of the side holes 23a and 23b are formed small, the strength of the tube body 21A can be sufficiently maintained, and compared with the above-described conventional example. Can maintain the strength of the tube.

Embodiment 2 This embodiment is based on the endoscopic biliary drainage method (ERB).
It is a drainage catheter (hereinafter referred to as ERBD tube) used for D), and FIG. 6 is a schematic side view with a part thereof omitted.

As shown in FIG. 6, in this ERBD tube 31, loops are symmetrically formed on both sides of an adjacent portion 30 having a side hole 23b, and a loop 22a having a side hole 23a at a front end 31a and a rear end portion. A loop portion 22b having a side hole 23c is provided at 31b. The tube size, tube material, and side holes 23a, 23b, 23c, etc. are also formed in the same manner as in the first embodiment, but when this ERBD tube 31 is also inserted into the body, the guide wire from the rear end portion 31b is used. Since it is inserted, a sealing plug or the like is provided only on the tip 31a as in the first embodiment.

FIG. 7 is a schematic diagram of the insertion state of the ERBD tube 31 of the present embodiment into the body. In order to let the bile 20 flow from the bile duct 11 in which the stenosis 16 has occurred to the duodenum 10, the ERBD tube 31 is shown. Is shown inserted into the bile duct 11.

As shown, this ERBD tube 31
The guide wire 26 is inserted from the rear end 31b, and the loop 22b of the rear end 31b and the loop 22a of the tip 31a are linearly stretched in advance. Is inserted into the bile duct 11. That is, it is inserted into the treatment tool insertion channel 28 of the endoscope 27 together with the guide wire 26, and the narrowed portion 1 at the target site in the body is inserted.
After passing the distal end portion of the guide wire 26 through the guide wire 6, the ERBD tube 31 is pushed into the narrowed portion 16 by the pusher tube 29 using the wire 26 as a guide. Next, when only the guide wire 26 is pulled out to the proximal side, the loop portions 22a and 22b at both ends of the tube are restored and the state shown in FIG. 6 is restored.

Then, by pulling out the endoscope 27 from the outside of the body, as shown in FIG. 8, only the ERBD tube 31 remains in the body, and the loop portion 22a is located on the upstream side 11a of the narrowed portion 16 and the loop portion 22b. Can be locked inside the duodenum 10 and prevented from falling off from the target site.

Therefore, the bile 2 in which the normal inflow from the bile duct 11 into the duodenum 10 is blocked by the stenosis 16
0 indicates the loop portion 22 in the upstream portion 11a of the bile duct 11.
From the side hole 23a of a to the adjacent portion 3 in the downstream portion 11b.
0 side hole 23b into the ERBD tube 31,
It efficiently flows out into the duodenum 10 from the side hole 23c of the other loop portion 22b.

Thus, this ERBD tube 31
Is a substitute bile duct for the bile duct 11 in which the function of supplying the bile 20 to the duodenum 10 has disappeared or decreased due to the occurrence of the stenosis 16.
It is left in the body for a certain period of time.

Also in this ERBD tube 31, when the guide wire 26 is inserted through the tube 31, the side hole 23b of the adjacent portion 30 is the same as in the first embodiment.
It is provided at a position rotated by 90 ° on the linear portion, and the diameter of the hole is small, so that it is not damaged by the guide wire 26, and the side holes 23a and 23c of the loop portions 22a and 22b at both ends are also loop surfaces. Because it is provided in
Since the tip of the guide wire 26 is not caught and the diameter of the hole is small even when the guide wire 26 is pushed and extended, it may cause kinking or buckling even if there is local tension or compression. Therefore, it is possible to avoid impairing the strength of the tube.

The ERBD tube 3 of this embodiment is used.
1, the contrast part 24 is provided only on the loop part 22a of the front end part 31a as described above, but it may be symmetrically provided on the loop part 22b of the rear end part 31b as well. You may produce the whole by.

As described above, according to this embodiment, E
The RBD tube 31 has loop portions 2 on both sides of the adjacent portion 30.
2a and 22b are formed symmetrically, side holes 23a and 23c are provided at predetermined intervals on the surfaces formed by the respective loops, and side holes 23b are also provided at adjacent parts 30 at predetermined intervals.
When the ERBD tube 31 is placed in the bile duct 11, the loop portion 22a is located on the upstream side 11a of the narrowed portion 16 of the bile duct 11 and the loop portion 22b is located inside the duodenum 10 and is hooked. And bile 20 flows into the tube from the side hole 23a in the upstream side 11a of the bile duct 11 and from the side hole 23b in the downstream side 11b, and from the side hole 23c of the other loop portion 22b to the duodenum 10. Since it flows out, it is possible to improve the supply efficiency of the bile 20 as compared with the above-mentioned conventional example of the same type (Actual Kaihei No. 2-65937).

Also. Since the side hole 23b of the adjacent portion 30 is provided at a predetermined angle in the rotation direction with respect to the axis 25 of the tube and is displaced in the length direction, the downstream side 11b.
Bile 20 existing in the tube is easily introduced evenly, there is no hindrance when inserting the guide wire 26, and the inner diameter of each side hole 23a, 23b, 23c is formed small, so that the strength of the tube is sufficiently maintained. It is possible to maintain the strength of the tube as compared with the conventional example described above.

The above-described respective embodiments can be variously modified based on the technical idea of the present invention.

For example, the side holes 23a, 23c provided in the loop portions 22, 22a, 22b and the side holes 23b provided in the adjacent portion 30 are not limited to round holes, but may be any shape such as a polygon or a star. it can.

Further, although the ENBD tube and the ERBD tube have been described as the bile duct indwelling tube for bile drainage in the embodiments, the invention is not limited to bile drainage tube and can be applied to other medical purposes.

The materials, structures, shapes, dimensions, etc. of the ENBD tube and the ERBD tube shown in the embodiment may be appropriate other than those in the embodiment.

[0055]

As described above, in the medical tube of the present invention, the body fluid flows into the tube through the second body fluid passage hole as well as the first body fluid passage hole, so that the body fluid discharge efficiency is improved. be able to. As a result, it is possible to secure a sufficient drainage amount even if the diameter of each bodily fluid circulation hole is formed small,
By reducing the diameter of the flow holes, it is possible to prevent the strength of the tube from decreasing.

[Brief description of drawings]

FIG. 1 shows an ENBD tube according to Embodiment 1 of the present invention, (a) is a schematic side view, and (b) is bb of (a).
It is a line expansion sectional view.

FIG. 2 is a schematic view showing a state where the ENBD tube is inserted into the body.

FIG. 3 is a schematic diagram of a main part showing a state in which the ENBD tube is placed in the bile duct.

FIG. 4 is an enlarged cross-sectional view of a main part of the ENBD tube in a state of being left in the bile duct.

FIG. 5 is a schematic view showing an example of a usage state of the ENBD tube.

FIG. 6 is a schematic side view showing an ERBD tube according to a second embodiment of the present invention.

FIG. 7 is a schematic view showing a state where the ERBD tube is inserted into the body.

FIG. 8 is a schematic view showing a state of placing the ERBD tube in the bile duct.

FIG. 9 is a schematic side view showing an example of an ENBD tube according to a conventional example.

FIG. 10 is a schematic view of a main part showing a state in which the ENBD tube is inserted into the body.

FIG. 11 is a schematic diagram of a main part showing a state where the ENBD tube is placed in the bile duct.

[Explanation of symbols]

10 ... Duodenum, 11 ... Bile duct, 11a ... Upstream side, 11b
... Downstream side, 12 ... Duodenal papilla, 16 ... Stenosis, 19
... pancreatic juice, 20 ... bile, 21 ... drainage catheter (E
NBD tube), 21A ... tube body, 21a, 3
1a ... Tip part, 21b, 31b ... Base end part (rear end part), 2
2 ... Loop portion, 23a ... Side hole (first circulation hole), 23b
... side hole (second circulation hole), 24 ... contrast part, 25 ... axial center,
26 ... Guide wire, 27 ... Endoscope, 28 ... Channel, 29 ... Pusher tube, 30 ... Adjacent part, 31 ...
Drainage catheter (ERBD tube), 32 ...
Stomach, 33 ... Esophagus, 34 ... Nostril, 35 ... Cheek, 36 ... Ear, 3
7 ... Container, α ... Angle, L, L _{1 to} L ₈ ... Distance

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Claims (5)

[Claims] 1. A medical tube which is inserted at a predetermined position in a living body and is used for guiding body fluid at this insertion position, wherein at least one first body fluid flow passage is provided on a side surface of at least one end of the tube body. A medical tube, wherein a hole is provided, and at least one second bodily fluid circulation hole is provided at a position adjacent to the end of the tube body. 2. The end portion is formed in a loop shape,
The medical tube according to claim 1. 3. An end portion of the tube body is formed in a loop shape having a predetermined length, a plurality of the first bodily fluid circulation holes are provided on a surface formed by the loop, and the second bodily fluid circulation hole is provided.
The medical tube according to claim 2, wherein a plurality of the tubes are provided at a predetermined angle with respect to the axis of the tube body, and are provided at positions displaced from each other in the longitudinal direction of the tube body. 4. The medical tube according to claim 1, wherein the second bodily fluid circulation hole is provided over a length corresponding to a bile duct. 5. The medical tube according to claim 1, wherein a contrast material is provided on the end portion.