JP6507578B2 - Drain tube - Google Patents

Description

  The present invention relates to a medical drain tube.

  There is provided a medical drain tube for aspirating body fluid such as blood, serosal fluid, digestive fluid, and pus fluid from the body of a subject and discharging it from the body. Generally, the distal end of the drain tube is indwelled in a body cavity, and the proximal end is placed outside the body and connected to a drainage bag, a drainage bottle or the like to be suctioned slightly negative pressure. Then, the middle portion of the drain tube is fastened and fixed to the surface of the body wall of the subject with a suture or the like. Thus, the drain tube is indwelled until the wound of the subject is healed to continuously aspirate and drain fluid from the body cavity.

  As this type of drain tube, those having various sizes and internal structures have been proposed. In Patent Document 1, four lumens are formed by four partitions in a length region on the distal end side, and these partitions disappear at an intermediate transition portion so that the lumen is integrated into one. The tube is described. As described above, by not forming the partition wall on the proximal end side of the transition portion, the opening area is increased, the fluid resistance is reduced, and the body fluid can be favorably sucked and discharged.

Japanese Patent Application Laid-Open No. 2002-283433

  Generally, the drain tube to be placed is fixed to the surface of the body wall of the subject by suturing or the like. And when the bodily fluid to be aspirated gradually decreases and a small diameter drain tube becomes sufficient, the drain tube indwelling may be replaced for various reasons. In such a case, generally the following procedure is performed. That is, first, the drain tube is cut above the body wall surface to insert a guide wire into the lumen, and a suture thread or the like is cut to release fixation with the body wall surface. Then, the drain tube indwelling is pulled out along the guide wire, and a new drain tube is inserted into the body cavity along the guide wire and left in place. Thereafter, the new drain tube is fixed to the body wall surface using a suture or the like, and the guide wire is removed.

  When inserting a guide wire into a drain tube indwelling, it may be required to select one of a plurality of lumens and insert the guide wire into the lumen. For example, in the case where the plurality of lumens provided in the drain tube include an end lumen which is exclusively opened at the distal end side and a slit lumen in which a slit opening is formed in the peripheral wall, the end lumen is selected and a guide wire is inserted. It is required to Thus, the distal end of the guide wire can be protruded from the distal end opening without laterally protruding from the slit opening and interfering with the body cavity wall of the subject.

  However, in the drain tube of Patent Document 1, since four lumens formed in the distal end length region are integrated into one at an intermediate transition portion, one of the lumens is selected to be a guide wire. There is a problem that it can not be inserted. That is, when replacing the indwelling drain tube, if the position to cut the drain tube is on the proximal side of the transition part, the guide wire is inserted into the lumen integrated into one. For this reason, the lumen from which the guide wire protrudes from the distal end side of the drain tube can not be selected as desired. On the other hand, when the transition portion is formed sufficiently proximal such that the position for cutting the drain tube is on the distal side of the transition portion, the fluid resistance is reduced and the body fluid is sucked and discharged well. It will not be possible. The position at which the drain tube is cut changes in various ways depending on the physical size of the subject and the position of the indwelling position, so that the transition portion is sufficiently proximal to the drain tube of Patent Document 1 to cope with the change. In the above, the length region in which the four partitions are formed becomes large.

  The present invention has been made in view of the problems as described above, and while allowing the fluid suction and discharge to be performed well from the subject's body, at the time of replacement work, a predetermined lumen is selected and a guide wire is inserted. To provide a medical drain tube that can be

According to the present invention, it comprises: a longitudinally extending peripheral wall and first and second partitions; and four or more lumens respectively defined by the peripheral wall and the partition ; an intermediate region; and the intermediate region a transition region is the length region of the proximal side of, a said drain tube for the intermediate and tip region of the distal end side than the region that have a medical, said lumen, said peripheral wall and said second Two or more slit lumens having slit openings defined by two partition walls and having a slit opening formed through the peripheral wall in the tip end region, and defined by the peripheral wall and the first partition wall, having the slit openings And one or more end lumens open at the distal end side of the drain tube, the first partition wall and the end lumens being in front of the distal end region and the intermediate region Three or more of the slit lumens and two or more of the second partitions are formed across the tip area and the middle area, and are formed in the middle area. An adjacent partition that is a part of the two or more second partitions and is circumferentially adjacent to the first partition disappears at the boundary between the intermediate region and the transition region, and the transition region And the other partition, which is the second partition other than the second partition, is the second partition which is radially opposed to the first partition, and the middle region and the middle region are separated from each other beyond the boundary. The three or more slit lumens in the middle region are formed in the transition region by forming over the tip in the transition region and disappearing in the transition region and not forming at the base end in the transition region. At the proximal end Communicating with each other, wherein the number of the slit lumens is a predetermined number smaller than the three or more in the middle region and smaller than the three or more in the distal end portion in the transition region and the proximal end in the transition region A drain tube is provided, characterized in that the number is less than a predetermined number .

  According to the medical drain tube of the present invention, one partition wall and one or more lumens are formed in the transition region of the drain tube, and one or more other partition walls are not formed, and the plurality of lumens communicate with each other There is. For this reason, the lumen formed in the transition area can be selected to insert the guide wire, and by forming one or more partition walls, the opening area of the drain tube becomes large, so that a good suction of body fluid can be obtained. It becomes possible to discharge.

It is a schematic diagram explaining the use condition of the drain tube concerning embodiment of this invention. It is the cross-sectional view which cut | disconnected the drain tube perpendicularly | vertically with respect to the longitudinal direction, and (a) to (e) shows the cross-sectional view respectively corresponding to the AA line cross section to the EE line cross section of FIG. It is a side sectional view explaining a tube manufacturing device. It is a perspective view of the 1st member of in-die. (A) is a side view of the front-end | tip part of the 1st member of in-die, (b) is the front view. It is a perspective view of the 2nd member of in-die. (A) is a perspective view showing a state in which the second member is advanced to project from the first member in the base end region forming step, and (b) is a first member in the first transition region forming step. It is a perspective view which shows the state retracted to the inside of. (A) is a cross-sectional view of the in-die in a slit formation process, (b) is a partial cross-sectional view of a tube manufacturing apparatus, (c) is a cross-sectional shape of the front-end | tip part area | region of a drain tube shape | molded. (A) is a cross-sectional view of the in-die in the intermediate region forming step, (b) is a partial cross-sectional view of the tube manufacturing apparatus, (c) is a cross-sectional shape of the intermediate region of the drain tube to be formed. (A) is a cross-sectional view of the in-die in the first transition area forming step, (b) is a partial cross-sectional view of the tube manufacturing apparatus, (c) is a cross-sectional shape of the first transition area of the drain tube to be formed. (A) is a cross-sectional view of the in-die in a 2nd transition area | region formation process, (b) is a fragmentary sectional view of a tube manufacturing apparatus, (c) is a cross-sectional shape of the 2nd transition area of the drain tube shape | molded. (A) is a cross-sectional view of the in-die in the proximal region forming step, (b) is a partial cross-sectional view of the tube manufacturing apparatus, (c) is a cross-sectional shape of the proximal region of the drain tube to be formed.

  Hereinafter, embodiments of the present invention will be described based on the drawings. In the drawings, the corresponding components are denoted by the same reference numerals, and overlapping descriptions will be omitted as appropriate. In the present specification, in describing the positional relationship and the like of the respective lumens, the left and right or up and down directions may be defined. However, this is conveniently defined to explain the relative relationship between the components, and does not limit the direction of production or use of the product according to the present invention.

  FIG. 1 is a schematic view illustrating a use state of a drain tube 60 according to an embodiment of the present invention. 2 (a) to 2 (e) are cross-sectional views of the drain tube 60 cut perpendicularly to the longitudinal direction, corresponding to the cross section along the line A-A to the cross section along the line E-E in FIG. It shows a cross-sectional view.

  First, an outline of the present embodiment will be described.

The drain tube 60 according to the present embodiment is used for medical use, and includes the circumferential wall 10 and the plurality of partitions (first partitions 30a to 30b and second partitions 32a to 32c) extending in the longitudinal direction, the peripheral wall 10 and the partitions And three or more lumens 20 (end lumens 21 and slit lumens 22 to 25) respectively defined.
The drain tube 60 has an intermediate region L2 and a transition region L3 which is a length region on the proximal side of the intermediate region L2. The middle region L2 shown in FIG. 2 (b) is a length region in which a plurality of partition walls (symbols omitted) are formed to define three or more lumens 20. In the transition region L3 (first transition region L31 and second transition region L32), a plurality of partition walls (first partition walls 30a to 30b) and one or more lumens 20 (end lumens 21) are formed among a plurality of Among them, one or more other partition walls (second partition walls 32a and 32c) are not formed, and a plurality of lumens 20 (slit lumens 22 to 25) are in a length region in which they communicate with each other.

  The transition area L3 is a length area in which the number of the lumens 20 and the number of partition walls change from the middle area L2. As shown in FIG. 1, the transition area L3 includes a first transition area L31 on the tip end DE side and a second transition area L32 adjacent to the base end PE side. The number of lumens 20 and the number of partition walls further change in the first transition region L31 and the second transition region L32.

In the first transition area L31 of the transition area L3, a part of the plurality (five in the present embodiment) of the partition walls (the first partition walls 30a to 30b and the second partition wall 32b) and one or more lumens 20 (end lumen 21 and Integrated lumens 26 and 27) are formed, one or more other partition walls (second partition walls 32a and 32c) are not formed, and two lumens 20 (slit lumens 22 and 23 and slit lumens 24 and 25) Each is in communication with each other.
In the second transition region L32 of the transition region L3, some of the plurality (five) of partitions (first partitions 30a to 30b) and one or more of the lumens 20 (end lumen 21 and integrated lumen 28 are formed; One or more partition walls (second partition walls 32 a to 32 c) are not formed, and four of the plurality of lumens 20 (slit lumens 22 to 25) communicate with each other.

  Next, the drain tube 60 of the present embodiment will be described in detail.

  As a material of the drain tube 60, a synthetic resin material used for medical use, such as soft vinyl chloride resin, silicone resin, urethane resin, etc. can be used. The total length of the drain tube 60 can be about 50 to 2000 mm. The thickness of the peripheral wall 10 is about 0.1 to 3.0 mm, and can be uniform in the circumferential direction and the length direction.

  The drain tube 60 can be divided into a tip end region L1, an intermediate region L2, a transition region L3 and a base end region L4 in order from the tip DE side. 2 (a) is a cross-sectional view of the tip end region L1, FIG. 2 (b) is a cross-sectional view of the middle region L2, and FIG. 2 (c) is a cross section of a first transition region L31 at the tip of the transition region L3. FIG. 2D is a cross-sectional view of the second transition region L32 at the proximal end of the transition region L3, and FIG. 2E is a cross-sectional view of the proximal region L4.

  As shown in FIG. 1, the drain tube 60 is used by being indwelled in the body cavity BC of the subject S. More specifically, at least the distal end region L1 of the drain tube 60 is inserted into the body cavity BC of the subject S, and the proximal end PE is drawn out of the subject S's body and aspirated to a slight negative pressure. Thus, the body fluid F present inside the body cavity BC can be suctioned out of the body through the drain tube 60. As the body fluid F, blood, serosal fluid, digestive fluid, pus fluid and the like can be exemplified.

  The middle region L2 of the drain tube 60 is inserted into the puncture hole PH provided in the body wall BW of the subject S, and used by being fixed to the body wall BW. Although the method of fixing the drain tube 60 is not particularly limited, the circumferential wall 10 of the drain tube 60 may be sutured to the body wall BW using the suture thread 62.

  As shown in FIG. 2 (a) to FIG. 2 (d), radiopaque contrast line 14 is disposed at a position corresponding to end lumen 21 in peripheral wall 10 of drain tube 60. As shown in FIG. The contrast line 14 is disposed linearly along the length of the drain tube 60. By providing the contrast line 14, the orientation of the drain tube 60 and the position of the tip DE can be confirmed under radiography such as X-ray.

  For the contrast line 14, a mixed material in which a radiopaque material is mixed with the above-described synthetic resin material that constitutes the peripheral wall 10 can be used. Examples of radiopaque materials include barium sulfate, bismuth subcarbonate, bismuth oxide, tungsten, tungsten carbide, zirconium oxide, tantalum, gold, platinum or silver.

  The contrast line 14 is disposed at a position corresponding to the end lumen 21 in the peripheral wall 10 and between the first partition walls 30a and 30b. By arranging the contrast line 14 at such a position, even if the slit openings 12a to 12d are opened and closed at the time of negative pressure suction of the body fluid F and the second partition walls 32a to 32c are locally shaken, contrast is enhanced under radiography The line 14 can be observed stably.

  Three or more lumens 20 are formed in the tip end region L1 shown in FIG. 2A and the middle region L2 shown in FIG. 2B. In the present embodiment, an aspect in which a total of five lumens 20 of one end lumen 21 and four slit lumens 22 to 25 are formed is illustrated. That is, the lumen 20 in the drain tube 60 of the present embodiment includes one or more end lumens 21 and a plurality of (four in the present embodiment) slit lumens 22 to 25. The end lumen 21 is defined by the peripheral wall 10 and the first partition wall (first partition walls 30 a to 30 b), and is open to the end DE side of the drain tube 60. The slit lumens 22 to 25 are defined by the peripheral wall 10 and the second partition wall (second partition walls 32a to 32c), and are slit openings formed in the peripheral wall 10 in the tip end region L1 on the tip DE side than the intermediate region L2. 12a to 12d are provided.

  The end lumen 21 being open on the side of the distal end DE of the drain tube 60 means that the end lumen 21 does not have a slit opening, and an opening is formed exclusively at the distal end DE of the drain tube 60. In addition to the slit openings 12a to 12d being formed through the peripheral wall 10, the slit lumens 22 to 25 are further opened at the distal end DE of the drain tube 60 as shown in FIG. 2 (a).

  However, the number of lumens 20 is not limited to this. For example, two or more end lumens may be formed, and two, three, or five or more slit lumens may be formed.

  In the middle region L2 shown in FIG. 2B, a first partition (first partitions 30a to 30b) and one or more (three in the present embodiment) second partitions (second partitions 32a to 32c) Are formed, and an end lumen 21 and a plurality of (four in the present embodiment) slit lumens 22 to 25 are formed. Then, in the transition region L3, the first partition walls (first partition walls 30a to 30b) and the end lumen 21 are formed, and part or all of the second partition walls (second partition walls 32a to 32c) are not formed. The plurality of slit lumens 22 to 25 communicate with each other.

  The end lumen 21 is formed in a length area extending from the tip DE of the drain tube 60 to at least the transition area L3. On the other hand, in the first transition region L31, the two adjacent slit lumens 22 to 25 are integrated with each other to form an integrated lumen 26 or 27. Furthermore, in the second transition region L32, all four slit lumens 22 to 25 are integrated. Integrated into an integrated lumen 28. That is, the integrated lumen 26 shown in FIG. 2C is a lumen in which the second partition wall 32a is not formed and the slit lumens 22 and 23 communicate with each other. The integrated lumen 27 is a lumen in which the second partition 32 c is not formed and the slit lumens 24 and 25 communicate with each other. The integrated lumen 28 shown in FIG. 2D is a lumen in which all of the second partition walls 32a to 32c are not formed and the slit lumens 22 to 25 all communicate with each other. Hereinafter, the integrated lumens 26 to 28 in which the slit lumens communicate with each other may also be referred to as a slit lumen.

  In the drain tube 60 of the present embodiment, the transition region L3 is formed longer than the intermediate region L2. In other words, the intermediate region L2 is formed shorter than the transition region L3. Since the first partition walls 30a to 30b and the second partition walls 32a to 32c are formed, and the intermediate region L2 in which the opening area of the drain tube 60 is small becomes short, the pressure loss in the drain tube 60 is reduced, and the body fluid F (see FIG. 1) Good aspiration is possible. Here, the length of the transition area L3 is the total length of the first transition area L31 and the second transition area L32. Intermediate region L2 can be, for example, 10 mm or more and 50 mm or less.

  According to the drain tube 60 of the present embodiment, since the first partition walls 30a to 30b and the second partition walls 32a to 32c are formed in the intermediate region L2, the pressure resistance is high. Therefore, the intermediate region L2 is sutured with the suture thread 62 and fixed to the body wall BW, whereby the closure of the lumen 20 by the tightening force of the suture thread 62 is suppressed and the suction and discharge of the body fluid F are inhibited. I have not. Then, a part of the lumen 20 is opened as the end lumen 21 to the tip DE side of the drain tube 60, and the end lumen 21 is formed from the tip region L1 through the middle region L2 to at least the transition region L3. ing. For this reason, the opening of the end lumen 21 can be easily exposed by cutting the drain tube 60 in the transition region L3 placed outside the body. Therefore, by inserting a guide wire (not shown) into the opening of the end lumen 21 which appears cut in the transition region L3, the guide wire can be reliably guided to the opening of the tip DE of the drain tube 60 is there. Moreover, according to the drain tube 60 of the present embodiment, a part or all of the second partition walls 32a to 32c formed in the intermediate region L2 is not formed in the transition region L3, and the slit lumens 22 to 25 communicate with each other. Do. For this reason, the opening area of the drain tube 60 in the transition region L3 and its proximal side (the proximal region L4) can be increased. That is, the first partition walls 30a to 30b and the second partition walls 32a to 32c are formed to form a short intermediate region L2 in which the flow passage is narrowed, and a transition region L3 in which the flow passage is wider than this is formed long to While it is possible to reduce the fluid resistance of F, it is possible to select the end lumen 21 and insert a guide wire by cutting the transition region L3 when replacing the drain tube 60.

  The first partition walls 30 a to 30 b and the second partition walls 32 a to 32 c are radially formed in the cross section of the drain tube 60. In the distal end region L1 and the middle region L2, all of the lumens 20 (end lumens 21 and slit lumens 22 to 25) are defined by the peripheral wall 10, the first partition walls 30a to 30b, and the second partition walls 32a to 32c.

  More specifically, three or more slit lumens 22 to 25 and two or more second partition walls (second partition walls 32a to 32c) are formed in the tip end region L1 and the middle region L2. The second partition wall 32b and one or more (two in the present embodiment) slit lumens (integrated lumens 26 and 27) are formed at the tip (first transition region L31) in the transition region L3. The numbers of the second partition walls and the slit lumens decrease toward the proximal end portion (second transition region L32) of the transition region L3. That is, in the second transition region L32, no second partition wall is formed, and one slit lumen (integrated lumen 28) is formed.

  From the middle region L2 to the second transition region L32 of the transition region L3, the number of second partition walls is three (second partition walls 32a to 32c: middle region L2), one (second partition wall 32b: first transition region) L31) is reduced to a plurality of levels in the order of 0 (second transition region L32). And the number of slit lumens is also four (slit lumens 22 to 25: middle region L2), two (integrated lumens 26 and 27: first transition region L31), one (integrated lumen 28: second transition region L32) The order has been reduced to multiple levels.

  At the tip (first transition region L31) in the transition region L3, as shown in FIG. 2 (c), the second partition facing the first partition (the first partitions 30a to 30b) in the radial direction The opposing partition 32b which is (second partition) is formed, and the adjacent partitions 32a and 32c which are other second partitions which are adjacent to the first partitions 30a to 30b in the circumferential direction are not formed. Then, in the base end portion (second transition region L32) in the transition region L3, as shown in FIG. 2D, the opposing partition 32b and the adjacent partitions 32a and 32c are both not formed and 3 or more (4 in this embodiment) ) Slit lumens 22-25 communicate with each other.

  Thus, the pressure resistance of the drain tube 60 is high in the intermediate region L2, and gradually decreases in the order of the first transition region L31 and the second transition region L32. For this reason, the drain tube 60 drawn out of the body is prevented from kinking in the transition region L3. In particular, by forming the opposing partition wall 32b in the first transition region L31 continuous with the intermediate region L2, the drain tube 60 can maintain high rigidity in the radial direction by the first partition walls 30a to 30b and the opposing partition wall 32b. Therefore, even when the tightening force of the suture thread 62 extends from the intermediate region L2 to the first transition region L31, the drain tube 60 is prevented from being crushed.

  The opening area of the drain tube 60 continuously or gradually increases from the distal end DE side to the proximal end PE side across the middle region L2 and the transition region L3. Stepwise means one or more steps, and may be multiple steps. That is, when the second partition walls (adjacent partition walls) 32a and 32c are formed to disappear discontinuously at the boundary between the intermediate region L2 and the first transition region L31, the opening area of the drain tube 60 is the intermediate region L2 And the first transition region L31. Similarly, when the second partition wall (opposite partition wall) 32b is formed to disappear discontinuously at the boundary between the first transition region L31 and the second transition region L32, the opening area of the drain tube 60 is the first It is expanded stepwise from the transition area L31 to the second transition area L32. When the second partition walls 32a to 32c are formed to gradually disappear in the length direction, the opening area of the drain tube 60 is from the middle region L2 to the first transition region L31, and from the first transition region L31 to It continuously spreads over the second transition region L32.

  As in the drain tube 60 of the present embodiment, the body fluid F to be aspirated (see FIG. 1) is continuously or stepwisely expanded over the intermediate region L2 and the transition region L3. Good aspiration and drainage without excessive decelerating internally.

  In the drain tube 60 of the present embodiment, the first partition wall (first partition walls 30a to 30b) is not formed further on the proximal end PE side than the transition region L3, and the end lumen 21 and the plurality of slit lumens 22 to 25 are mutually It has a proximal end region L4 in communication (see FIG. 2 (e)). In the proximal end region L4 of the drain tube 60, all of the end lumen 21 and the slit lumens 22 to 25 are integrated to form a single lumen 29.

  As a result, the proximal end PE of the drain tube 60 opens a circular single lumen 29. Therefore, a puncture needle or a suction tool (not shown) can be attached without attaching a special jig to the proximal end PE of the drain tube 60.

  However, instead of the present embodiment, the transition region L3 may be extended to the proximal end PE. That is, the end lumen 21 formed in the second transition region L32 may extend to the proximal end PE of the drain tube 60. In such an embodiment, when replacing the indwelling drain tube 60, even if the drain tube 60 is cut at any position outside the body wall BW of the subject S, the opening of the end lumen 21 appears in the cut surface, and therefore a guide wire (Not shown) can be reliably guided to the opening of the tip DE of the drain tube 60.

  Below, the manufacturing method of the drain tube 60 of this embodiment is demonstrated.

  The method of manufacturing the drain tube 60 is not particularly limited, and the distal end region L1 to the proximal end region L4 may be individually formed and joined in the length direction, or the distal end region L1 to the proximal end region L4 may be continuous It may be formed in the same manner.

  When the distal end region L1 to the proximal end region L4 are individually formed, a plurality of molds having cross sections complementary to the cross sectional shape of the drain tube 60 shown in FIGS. 2 (a) to 2 (e) are used. It is good to create separately. Then, the drain tube 60 can be divided into length regions to form short tubes by extrusion molding or injection molding, and these short tubes can be joined to form the drain tube 60. Adjacent short tubes may be joined together with the peripheral wall 10 and the partition walls (the second partition walls 32a to 32c and / or the first partition walls 30a to 30b) by an adhesive or heat fusion.

  In the case of continuously forming from the distal end region L1 to the proximal end region L4, a long gold having a cross section complementary to the cross sectional shape of the drain tube 60 shown in FIGS. 2 (a) to 2 (e). You should create a type. The mold may be coated with a resin tube, and further a heat shrinkable tube may be coated on the outer peripheral surface, and heat and pressure may be formed to form the drain tube 60. This mold is composed of a plurality of relative movable parts, and when the mold is removed from the drain tube 60 after pressure molding, the part corresponding to the slit openings 12a to 12d is pulled out to the tip DE side, The portions respectively corresponding to the one lumen 29, the integrated lumens 26 to 28, the end lumen 21 and the slit lumens 22 to 25 may be pulled out to the proximal end PE side.

  Moreover, in order to shape | mold from the front-end | tip part area | region L1 to the proximal end area | region L4 continuously, you may extrude the drain tube 60 using the following in-die 100 and the tube manufacturing apparatus 300. FIG. Hereinafter, such a manufacturing method may be referred to as "the present method".

  That is, the method is a tube manufacturing method in which the resin drain tube 60 is extrusion-molded using the in-die 100. The drain tube 60 includes the longitudinally extending peripheral wall 10 and the plurality of partition walls (first partition walls 30a to 30b and second partition walls 32a to 32c), as described above with reference to FIG. Three or more predetermined numbers (five in the present embodiment) of lumens 20 defined by the peripheral wall 10 and the partition wall (not shown) are formed in at least a part of the length region. The in-die 100 has the predetermined number of claws 112a to 112e which are spaced apart from one another via a plurality of air gaps 114a to 114e (see FIGS. 5 and 6).

  FIG. 3 is a side sectional view illustrating the tube manufacturing apparatus 300. As shown in FIG. The left side of the figure may be referred to as the front or distal side, and the right side of the figure may be referred to as the posterior or proximal side. For convenience, the tips of the first member 110 and the second member 120, the first drive mechanism 310 and the second drive mechanism 320 are shown in a side view rather than a cross-sectional view. FIG. 4 is a perspective view of the first member 110 of the in-die 100. FIG. 5A is a side view of the tip of the first member 110 of the in-die 100, and shows the first member 110 viewed in the direction of arrow A in FIG. FIG. 5B is a front view of the first member 110 and shows a state in which the first member 110 is viewed in the direction of arrow B in FIG. 4. FIG. 6 is a perspective view of the second member 120 of the in-die 100. FIG. 7A is a perspective view showing a state in which the second member 120 is advanced and protruded from the first member 110 in the base end region forming step. FIG. 7B is a perspective view showing a state in which the second member 120 is retracted into the inside of the first member 110 in the first transition area forming step.

  The tube manufacturing apparatus 300 used for this method is an apparatus provided with the in-die 100 and extruding the drain tube 60 of this embodiment. As described above, the drain tube 60 has at least one predetermined number (three in the present method) of lumens 20 separated by at least one of the partitions (the first partitions 30a to 30b and the second partitions 32a to 32c). A through hole is formed in the length area of the part.

  The tube manufacturing apparatus 300 includes an out-die 200 having a discharge port 202 for discharging the molten resin R1, a first drive mechanism 310 for relatively driving the first member 110 and the second member 120 of the in-die 100, and the in-die 100. And a second driving mechanism 320 for driving the out die 200 relative to each other. The in-die 100 is provided to be able to advance and retract with respect to the discharge port 202.

  The in-die 100 is used by inserting the pin-shaped second member 120 shown in FIG. 6 into the inside of the outer cylindrical first member 110 shown in FIG. The first drive mechanism 310 drives the second member 120 back and forth to the out die 200, and the second drive mechanism 320 drives the first member 110 back and forth to the out die 200. That is, by driving the first drive mechanism 310 in a state in which the second drive mechanism 320 is fixed, the second member 120 is driven to move back and forth with respect to the first member 110. Then, by driving the first drive mechanism 310 and the second drive mechanism 320 together, the in-die 100 is advanced and retracted relative to the out-die 200 while the first member 110 and the second member 120 are relatively fixed. It can be driven. For the first drive mechanism 310 and the second drive mechanism 320, linear drive devices such as hydraulic devices that operate linearly are used.

  By relatively driving the first member 110 and the second member 120, as shown in FIG. 2 (b) to FIG. 2 (e), the first partition walls 30a to 30b formed on the drain tube 60 And the number of second partition walls 32a to 32c can be changed stepwise. Further, by driving the first member 110 and the second member 120 back and forth with respect to the out-die 200, as shown in FIG. 2A, the slit openings 12a to 12d can be formed in the peripheral wall 10 of the drain tube 60. it can.

  As shown in FIG. 3, the out-die 200 is disposed in front of the tube manufacturing apparatus 300. At the center of the out-die 200, a circular discharge port 202 is formed penetrating. The tip of the in-die 100 is disposed inside the discharge port 202. The inside of the discharge port 202 means the inside of the discharge port 202 in a front view of the out-die 200, and the end of the in-die 100 protrudes forward from the discharge port 202 or recedes backward from the discharge port 202 Also includes the state of doing.

  The tube manufacturing apparatus 300 further includes a guide 220 disposed behind the out-die 200 and passing through the tip of the in-die 100. The guide 220 has a frusto-conical shape projecting toward the discharge port 202. The guide 220 is formed with a circular guide opening 222 (see FIGS. 7A and 7B) through which the tip of the first member 110 is inserted. A resin supply path 230 is formed between the front surface 221 of the guide 220 and the tube manufacturing apparatus 300. The resin material for forming the peripheral wall 10 and the partition walls (the first partition walls 30a to 30b and the second partition walls 32a to 32c) of the drain tube 60 is supplied to the resin supply path 230 from the extruder 214 in a molten state. The molten resin R1 flows along the front surface 221 of the guide 220 toward the discharge port 202, contacts the tip portion of the in-die 100 protruding from the guide 220, and has a shape complementary to the in-die 100. It is discharged from.

  The tube manufacturing apparatus 300 includes a second resin supply passage 232 different from the resin supply passage 230. A second resin material R2 mixed with a radiopaque contrast agent is supplied from the second extruder 216 to the second resin supply path 232 in a molten state. The second resin material R2 forms the contrast line 14 (see each drawing in FIG. 2). The second resin supply path 232 is connected to the resin flow path 212 formed on the back side of the out die 200.

  Next, the in-die 100 will be described in more detail.

  As shown in FIG. 4, the first members 110 of the in-die 100 are integrally formed by projecting claws 112 a to 112 e from the tip of the cylindrical body 118. A flange portion 119 is formed on the base end side of the body portion 118. The flange portion 119 is connected to the second drive mechanism 320 (see FIG. 3) and driven to move forward and backward.

  As shown in FIG. 5 (b), the first members 110 of the in-die 100 are spaced apart from each other via the gaps 114 a-114 e to form a predetermined number (five in this embodiment) of lumens 20. It has nail | claw parts 112a-112e.

  The claw portion 112 a is a portion forming the end lumen 21 in the drain tube 60, and the claw portions 112 b to 112 e are portions forming the slit lumens 22 to 25 in the drain tube 60, respectively.

  The first member 110 is formed on the outer surface of the claws 112b to 112e of the predetermined number (five in the present embodiment) so as to project and form the slit openings 12a to 12d in the peripheral wall 10 of the drain tube 60 It has outer protrusions 116a-116d. And the outer side projection part is not formed in the outer surface of the nail | claw part 112a.

  The outer protrusions 116a to 116d are formed to have a circumferential length that is a part of the claws 112b to 112e in a front view. Thereby, as shown to Fig.2 (a), slit opening 12a-12d by which a part of surrounding wall 10 was notched is formed in slit lumens 22-25 of the drain tube 60, respectively.

The second member 120 of the in-die 100 shown in FIG. 6 is provided so as to be able to move forward and backward with respect to the first member 110, and a plurality of (five in the present embodiment) projecting pieces 122a to 122 are inserted in the gaps 114a to 114e. It has 122e.
The second member 120 has one or more projecting pieces 122a to 122e at a first position P1 in the advancing / retreating direction and a second position P2 on the proximal side of the first position P1. Further, the number of protruding pieces (symbols omitted) formed differs between the first position P1 and the second position P2.

  The second member 120 has a cylindrical sliding portion 124. The sliding portion 124 is slidably inserted into the body portion 118 of the first member 110. The projecting piece portions 122 a to 122 e are integrally formed so as to protrude to the tip end side of the sliding portion 124.

  A predetermined number (five in the present embodiment) of projecting pieces 122a to 122e equal to the number of lumens 20 are formed at the second position P2 corresponding to the proximal end of the second member 120, and the first position corresponding to the distal end A number (two) of projecting pieces 122c and 122e smaller than the predetermined number are formed on P1.

  Furthermore, in the second member 120, at the third position P3 between the first position P1 and the second position P2 in the advancing and retreating direction, the number of the projecting pieces 122a to 122e at the second position P2 (five) A smaller number (three) of protruding pieces 122c to 122e are formed than the number of protruding pieces 122c and 122e at the first position P1.

  The projecting pieces 122 a to 122 b are portions for forming the first partition walls 30 a to 30 b of the drain tube 60, respectively. The protruding portions 122 c to 122 e are portions for forming the second partition walls 32 a to 32 c in the drain tube 60, respectively.

  The projecting pieces 122a to 122e are formed in a plate shape that protrudes in the radial direction from the axial center of the second member 120 of the in-die 100 and extends along the axial direction. The second member 120 terminates between the first position P1 and the third position P3 and projecting pieces 122c and 122e which extend in the axial direction long in the first position P1 and the second position P2. It has the protrusion part 122d of middle length, and the short protrusion parts 122a-122b which terminate between the 3rd position P3 and the 2nd position P2. These short protruding pieces 122a to 122b are adjacent to each other in the circumferential direction of the second member 120, and may be hereinafter referred to as "adjacent protruding pieces".

  An intermediate length projecting piece 122d is formed on the opposite side of the short projecting pieces (adjacent projecting pieces) 122a to 122b via the long projecting pieces 122c and 122e. That is, at the third position P3 of the second member 120, the short protruding pieces (adjacent protruding pieces) 122a and 122b, and the protrusions facing the protruding pieces 122a and 122b in the radial direction of the second member 120 A piece 122d is formed.

  The second member 120 is inserted into the first member 110 in a predetermined direction. That is, as shown in FIGS. 7 (a) and 7 (b), the adjacent projecting pieces 122a to 122b of the second member 120 are made of the first member 110 with the outer projections sandwiching the non-formed hooks 112a. It interposes in the cavity parts 114a-114b.

  Hereinafter, a method of forming the proximal region L4 from the distal end region L1 of the drain tube 60 will be described with reference to FIGS. 8 to 12. The step of forming the front end region L1 is a slit forming step, the step of forming the intermediate region L2 is an intermediate region forming step, the step of forming the first transition region L31 is a first transition region forming step, and the second transition region L32 is formed The step of forming is referred to as a second transition region forming step, and the step of forming the proximal region L4 is referred to as a proximal region forming step.

  Although the following description exemplifies that the slit formation step, the intermediate region formation step, the first transition region formation step, the second transition region formation step, and the base end region formation step are performed in this order, the present method is not limited thereto. . These may be performed in the reverse order.

  8 (a) to 8 (c) are diagrams for explaining the slit forming step, and FIG. 8 (a) is a cross-sectional view of the in-die 100. FIG. The cross-section of the in-die 100 refers to the cross-section obtained by cutting the first member 110 and the second member 120 at the discharge port 202 of the out-die 200, and the same applies to FIGS. 9 (a) to 12 (a). FIG. 8B is a partial cross-sectional view of the tube manufacturing apparatus 300. As shown in FIG. For convenience, the front end portions of the first member 110 and the second member 120 are displayed not in cross section but in side views, and the same applies to FIGS. 9 (b) to 12 (b). FIG. 8C shows the cross-sectional shape of the distal end region L1 of the drain tube 60 to be molded.

  In the slit forming step, the first member 110 of the in-die 100 is advanced toward the discharge port 202 to form the slit openings 12 a to 12 d in the peripheral wall 10 of the drain tube 60. The molten resin R1 is brought into contact with the in-die 100 in a state in which the first member 110 is advanced such that at least a portion in the length direction of the outer protrusions 116a to 116d of the first member 110 protrudes forward than the discharge port 202 Then, the ink is discharged from the discharge port 202. At this time, the second member 120 is sufficiently retracted such that the projecting pieces 122a to 122e (see FIG. 7) are positioned rearward of the tip of the guide 220.

  As a result, as shown in FIG. 8A, the claws 112a to 112e and the outer protrusions 116a to 116d appear on the cross section of the in-die 100 at the discharge port 202. And slit opening 12a-12d is formed in the surrounding wall 10 of slit lumens 22-25 in tip part area L1 created at a slit formation process.

  At this time, the second resin material R2 is supplied to the resin flow channel 212 of the out-die 200 from the second extruder 216 (see FIG. 3). Thereby, the contrast line 14 is formed together with the peripheral wall 10 of the drain tube 60. Thereafter, the contrast line 14 is continuously formed until the proximal end region forming step.

  9 (a) to 9 (c) are diagrams for explaining the intermediate region forming step, and FIG. 9 (a) is a transverse sectional view of the in-die 100, and FIG. 9 (b) is a partial sectional view of the tube manufacturing apparatus 300. FIG. 9C shows the cross-sectional shape of the intermediate region L2 of the drain tube 60 to be molded.

  In the intermediate region forming step, the first member 110 is retracted more than in the slit forming step so that the outer protrusions 116 a to 116 d are positioned behind the tip of the guide 220. Then, the plurality of voids 114a to 114e of the in-die 100 disposed inside the discharge port 202 from which the molten resin R1 is extruded is opened to bring the molten resin R1 into contact with the in-die 100. In the present embodiment, all the air gaps 114a to 114e are opened. Thereby, an intermediate wall in which the peripheral wall 10, the plurality of partition walls (five of the first partition walls 30a to 30b and the second partition walls 32a to 32c in the present embodiment) and three or more (five in the present embodiment) lumens 20 are formed Region L2 is created. And slit opening 12a-12d (refer to Drawing 8 (c)) is not formed in slit lumens 22-25 of middle field L2, but circling peripheral wall 10 is formed.

  10 (a) to 10 (c) illustrate the first transition area forming step, and FIG. 10 (a) is a cross sectional view of the in-die 100, and FIG. 10 (b) is a portion of the tube manufacturing apparatus 300. FIG. 10C is a cross-sectional view of the first transition region L31 of the drain tube 60 to be molded.

  In the first transition area forming step, while the first member 110 is fixed to the discharge port 202, the second member 120 is advanced slightly more than the intermediate area forming step. The foremost projecting pieces 122c and 122e (see FIG. 6) formed at the first position P1 of the second member 120 are made to project more than the discharge port 202, and the other projecting pieces 122a to 122b and 122d are discharged from the discharge port 202. The position is more backward than that. Then, the air gaps 114c and 114e (see FIG. 9A) of the plurality of in the in-die 100 are closed, and the other air gaps 114a to 114b and 114d (see FIG. 9A) are opened. The molten resin R1 is brought into contact with the in-die 100. In this way, the number (three in the present embodiment) of the plurality (three in the present embodiment) of partitions (numbers less than the number (5)) and the lumens 20 of a portion (three) of the three or more (five) , And the other lumens 20 communicate with each other. Specifically, the slit lumens 22 and 23 communicate with each other to form an integrated lumen 26, and the slit lumens 24 and 25 communicate with each other to form an integrated lumen 27.

  The intermediate region forming step and the first transition region forming step are performed in succession while continuing the extrusion of the molten resin R1. Thus, in the drain tube 60, the intermediate region L2 and the first transition region L31 can be formed continuously.

  11 (a) to 11 (c) are diagrams for explaining the second transition region forming step, and FIG. 11 (a) is a transverse sectional view of the in-die 100, and FIG. 11 (b) is a portion of the tube manufacturing apparatus 300. FIG. 11C is a cross-sectional view of the second transition region L32 of the drain tube 60 to be molded.

  In the second transition region forming step, the second member 120 is advanced slightly further than the first transition region forming step while the first member 110 is fixed to the discharge port 202. The protruding pieces 122c to 122e (see FIG. 6) formed at the third position P3 of the second member 120 are made to project more than the discharge port 202, and the other protruding pieces 122a to 122b are retracted from the discharge port 202. Position. As a result, the projecting pieces 122c and 122e formed at the first position P1 project more than the claws 112c and 112e. Then, the void portions 114c to 114e (see FIG. 9A) in the in-die 100 are closed, and the other void portions 114a to 114b (see FIG. 9A) are opened to make the molten resin R1 in-die 100. Contact with. Thus, the number (two in the present embodiment) of the plurality (two in the present embodiment) of the plurality (five) of the plurality (five) is smaller than the plurality (five) and the lumens 20 of a part (two) of the three or more (five). , And the other lumens 20 communicate with each other. Specifically, the slit lumens 22-25 communicate with each other to form an integrated lumen 28.

  12 (a) to 12 (c) are diagrams for explaining the base end region forming step, and FIG. 12 (a) is a cross sectional view of the in-die 100, and FIG. 12 (b) is a partial cross section of the tube manufacturing apparatus 300. FIG. 12C shows the cross-sectional shape of the proximal end region L4 of the drain tube 60 to be molded.

  In the base end region forming step, while the first member 110 is fixed to the discharge port 202, the second member 120 is advanced further than the first transition region forming step. During the entire process, the second member 120 takes the most advanced position relative to the first member 110. The protruding pieces 122a to 122e (see FIG. 6) at the second position P2 of the second member 120 are inserted into the gaps 114a to 114e (see FIG. 9A) of the first member 110, and a plurality (in this embodiment) All five air gaps 114 a to 114 e are closed to bring the molten resin R 1 into contact with the in-die 100. Thereby, the first partitions 30a to 30b and the second partitions 32a to 32c are not formed. Specifically, the end lumen 21 and the slit lumens 22 to 25 all communicate with each other to form a proximal region L4 in which a single lumen 29 is formed.

  As described above, according to the present method, the drain tube 60 in which the proximal region L4 is continuously formed from the distal region L1 is created.

  The present invention is not limited to the above-described embodiment, and also includes various modifications, improvements and the like as long as the object of the present invention is achieved.

  For example, although the above embodiment exemplifies that both the first transition region L31 and the second transition region L32 are formed, the present invention is not limited thereto, and the drain tube 60 may be a first transition region L31 or a second transition region. Only one of the L 32 may be provided. For example, when the first transition region L31 is formed and the second transition region L32 is not formed, the proximal end region forming step may be performed in tandem with the above-described first transition region forming step. When the second transition area L32 is formed and the first transition area L31 is not formed, the second transition area forming process may be performed in tandem with the above-described intermediate area forming process.

  It should be noted that the various components of the drain tube 60 of the present invention need not be separate entities. A plurality of components being formed as a single member, a single component being formed of a plurality of members, a certain component being part of another component, and one of the certain components Allow overlapping of parts and parts of other components, etc.

The above embodiment includes the following technical ideas.
(1) A medical drain tube comprising: a circumferential wall and a plurality of partitions extending in the longitudinal direction; and three or more lumens respectively defined by the circumferential wall and the partition, wherein the plurality of partitions are An intermediate region formed to define the three or more lumens, and a length region proximal to the intermediate region, wherein a part of the plurality of partition walls and one or more of the plurality of lumens And a transition region formed and not including one or more of the plurality of partition walls and in which the plurality of lumens communicate with each other.
(2) The lumen is defined by the peripheral wall and the first partition, and is defined by one or more end lumens opened on the distal end side of the drain tube, the peripheral wall and the second partition And a plurality of slit lumens provided with slit openings formed through the peripheral wall in a tip end region on the tip side of the intermediate region, the intermediate region including the first partition wall and one or more of A second partition is formed to form the end lumen and the plurality of slit lumens, and the transition region is formed to include the first partition and the end lumen, and a portion of the second partition or The drain tube according to the above (1), wherein the plurality of slit lumens communicate with each other in a completely non-formed manner.
(3) The three or more slit lumens and the two or more second partitions are formed in the tip area and the middle area, and the second partition and one or more of the second partitions are formed at the tip in the transition area. The drain tube according to (2), wherein a slit lumen is formed, and the number of the second partition wall and the slit lumen decreases toward the proximal end of the transition area.
(4) An opposing partition, which is the second partition opposite to the first partition in the radial direction, is formed at the tip end in the transition region, and in the circumferential direction with respect to the first partition The adjacent partition, which is the other adjacent second partition, is not formed, and at the proximal end portion in the transition region, the opposing partition and the adjacent partition are not formed together and the three or more slit lumens communicate with each other The drain tube as described in said (3).
(5) Any one of the above (2) to (4) in which the opening area continuously or stepwise increases from the distal end side to the proximal end side across the intermediate region and the transition region. Drain tube as described in.
(6) In the above (2) to (5), further on the proximal side than the transition area, the first partition is not formed, and the end lumen and the plurality of slit lumens communicate with each other. A drain tube according to any one of the preceding claims.
(7) The drain according to any one of (2) to (6), wherein a radiopaque contrast line is disposed at a position corresponding to the end lumen in the peripheral wall of the drain tube. tube.
(8) The drain tube according to any one of (1) to (5), wherein the transition region is provided to extend to the proximal end.
(9) The drain tube according to any one of (1) to (8), wherein the transition area is formed longer than the intermediate area.

Reference Signs List 10 peripheral wall 12a to 12d slit opening 14 contrast line 20 lumen 21 end lumen 22 to 25 slit lumen 26 to 28 integrated lumen 29 single lumen 30a to 30b first partition 32a, 32c second partition (adjacent partition)
32b Second partition (opposite partition)
DESCRIPTION OF SYMBOLS 60 drain tube 62 suture thread 100 in-die 110 1st member 112a-112e claw part 114a-114e gap part 116a-116d outer side projection part 118 trunk | drum 119 flange part 120 2nd member 122a-122b protrusion piece part (adjacent protrusion part)
122c to 122e Protrusive piece 124 Sliding part 200 Out die 202 Discharge port 212 Resin flow path 214 Extruder 216 Second extruder 220 Guide 221 Front face 222 Guide opening 230 Resin supply path 232 Second resin supply path 300 Tube manufacturing device 310 First drive mechanism 320 Second drive mechanism S Subject F Body fluid BC Body cavity BW Body wall PH Puncture hole DE Tip end PE Base end L1 Tip part area L2 Intermediate area L3 Transition area L31 First transition area L32 Second transition area L4 Base end area P1 first position P2 second position P3 third position R1 molten resin R2 second resin material

Claims (6)

A longitudinally extending peripheral wall and first and second partition walls, and four or more lumens respectively defined by the peripheral wall and the partition wall , an intermediate region and a proximal side of the intermediate region a transition region is a length field, a said drain tube medical that Yusuke and tip region of the distal end side than the intermediate region, and
The lumen is
Three or more slit lumens having slit openings defined by the peripheral wall and the second partition and penetrating through the peripheral wall in the tip end region;
And one or more end lumens defined by the circumferential wall and the first partition wall and open to the distal end side of the drain tube without the slit opening;
The first partition and the end lumen are formed across the tip area, the intermediate area, and the transition area,
Three or more of the slit lumens and two or more of the second partitions are formed across the tip region and the intermediate region;
An adjacent partition which is a part of the two or more second partitions formed in the middle region and is adjacent to the first partition in the circumferential direction is the middle region and the transition region. Disappearing at the boundary and not forming in the transition region,
Another opposing second partition, which is the second partition opposite in the radial direction to the first partition, extends beyond the boundary to a tip of the intermediate region and the transition region. And three or more of the slit lumens in the middle region communicate with each other at the proximal end in the transition region by being formed across the transition region and disappearing in the transition region and not being formed at the proximal end in the transition region. Yes,
The number of slit lumens is a predetermined number less than the three or more in the middle region and the three or more at the tip in the transition region, and a number less than the predetermined number in the proximal portion in the transition region drain tube, characterized in that. The drain tube according to claim 1 , wherein the opening area continuously or gradually increases from the distal side to the proximal side across the intermediate region and the transition region. The drain tube according to claim 1 or 2 , further comprising a base end region where the first partition wall is not formed and the end lumen and the plurality of slit lumens communicate with each other on the more proximal side than the transition region. . The drain tube according to any one of claims 1 to 3 , wherein a radiopaque contrast line is disposed at a position corresponding to the end lumen in the peripheral wall of the drain tube. The drain tube of claim 1 or 2 transition region is provided extending to the proximal end. The drain tube according to any one of claims 1 to 5 , wherein the transition area is formed longer than the intermediate area.

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