A drainage tube

Abstract

The present invention belongs to the field of medium delivery equipment, and specifically relates to a drainage tube, including a drainage tube body, a capsule assembly and a resistance part. The capsule assembly includes a support ring body, a spring-shaped capsule body and a deformable capsule body connected in sequence, and the cavities of the three can be connected to form a cavity that is axially connected and connected to the drainage tube cavity. The support ring body is matched with the inner wall of the drainage tube cavity through the resistance part, which can prevent the support ring body from slipping to the outside. The spring-shaped capsule body and the deformable capsule body are respectively provided with inner tube one and inner tube two, and both inner tubes extend in the drainage tube cavity and the free port leads to the outside of the drainage tube cavity. The spring-shaped capsule body can push the deformable capsule body to the outside. The deformable capsule body can be inflated into a trumpet-shaped structure and the expanded end is a free end. The present invention improves the structure of the drainage tube port so that the diameter of the tube mouth of the drainage tube can be adjusted and changed, and can switch between the expanded diameter support state and the original contracted state, while ensuring smooth drainage, it can also ensure that the drainage tube is easy to plug and unplug.

Description

Technical Field

[0001] The invention relates to the technical field of medium conveying equipment, and in particular to a drainage tube. Background Art

[0002] Drainage tubes are used for clinical surgical drainage. They are a kind of medical device that guides pus, blood, and liquid accumulated between human tissues or in body cavities to the outside of the body to prevent postoperative infection and promote wound healing. There are many types of surgical drainage tubes used clinically, including those for urinary catheterization, those for wound drainage of blood stasis, and those for drainage of effusion in the chest cavity, brain cavity, gastrointestinal tract, bile duct, etc. Drainage tubes are generally made of materials such as silicone rubber or polyurethane. When in use, one end of the catheter is inserted into the drainage site in the body cavity or between tissues, and the other end of the catheter is left outside the body and can be connected to other external instruments. The drainage tube can drain the patient's effusion, exudate or gas to the outside of the body with the help of pressure such as body pressure, gravity or negative pressure suction. There will be certain differences in the diameter and structure of drainage tubes for different purposes and different parts. For example, the outer diameter of drainage tubes used for the gastrointestinal tract, such as gastric cavity drainage tubes and anal drainage tubes, is slightly thicker than the diameter of urethral drainage tubes and bile duct drainage tubes.

[0003] In order to facilitate the insertion of one end of the drainage tube into the body and avoid forming a large wound in the insertion path, the outer diameter of the drainage tube is limited. Therefore, when using the existing drainage tube, the end of the drainage tube inserted into the body cavity or between tissues is prone to the port pressing against the wall of the organ or tissue, or being covered by the human tissue outside the port, resulting in poor drainage. Summary of the invention

[0004] In order to overcome the problem that the drainage tube port is easily blocked or covered, resulting in poor drainage, the present invention provides a drainage tube, which improves the structure of the drainage tube port so that the diameter of the tube mouth of the drainage tube can be adjusted and changed, and can switch between an expanded diameter support state and an original contracted state. It has the advantages of ensuring easy insertion and removal of the drainage tube while ensuring smooth drainage.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a drainage tube, comprising a drainage tube body, a capsule assembly and a resistance part. The drainage tube body comprises a first end and a second end which are relatively distributed at two ends of the drainage tube cavity. When in use, the first end is used to be inserted into a body cavity or between tissues, and the second end is retained outside the body.

[0006] The bladder assembly is fixedly disposed in the drainage tube cavity and close to one side of the first end head. In the initial state, the entire bladder assembly is relatively retracted into the port of the first end head, so as to facilitate the insertion of the drainage tube.

[0007] The capsule assembly includes a supporting ring body, a spring-shaped capsule body and a deformable capsule body which are connected to each other, and the spring-shaped capsule body is placed between the supporting ring body and the deformable capsule body, and the supporting ring body is relatively located on the side away from the first end. After the capsule assembly is placed in the drainage tube cavity, the deformable capsule body, the spring-shaped capsule body and the supporting ring body are arranged in sequence from the outer end to the inner end in the axial direction of the drainage tube cavity. The annular cavity of the supporting ring body, the annular cavity of the spring-shaped capsule body and the capsule cavity of the deformable capsule body can be connected in sequence to form an axially through cavity, and the cavity is connected with the drainage tube cavity.

[0008] The support ring body is matched with the inner wall of the drainage tube cavity through the resistance part, which can prevent the support ring body from slipping from the port of the first end to the outside of the drainage tube cavity, and enable the balloon assembly to remain fixedly connected to the drainage tube body, avoiding the balloon assembly from escaping from the drainage tube cavity as a whole.

[0009] The spring-shaped capsule is provided with an inner tube 1 connected to its capsule cavity, and the deformable capsule is provided with an inner tube 2 connected to its capsule cavity. The tube bodies of the inner tube 1 and the inner tube 2 both extend in the drainage tube cavity, and the free ends of the inner tube 1 and the inner tube 2 are respectively connected to the outside of the drainage tube cavity from positions close to the second end. For example, the free end of the inner tube 1 is passed through the tube wall of the drainage tube body and directly extends to the outside of the drainage tube cavity; or the free end of the inner tube 1 is connected to the branch tube structure provided on the drainage tube body, so that the free end of the inner tube 1 can be connected to the outside of the drainage tube cavity through the port of the branch tube structure; and the free end of the inner tube 2 is passed through the tube wall of the drainage tube body and directly extends to the outside of the drainage tube cavity; or the free end of the inner tube 2 is connected to the branch tube structure provided on the drainage tube body, so that the free end of the inner tube 2 can be connected to the outside of the drainage tube cavity through the port of the branch tube structure.

[0010] The spring-shaped capsule is cylindrical. When the spring-shaped capsule is switched to an extended state, the deformed capsule can be pushed out of the port of the first end. The deformed capsule can swell into a trumpet-shaped structure outside the drainage lumen or outside the port of the first end, and the expanded end of the trumpet-shaped structure is a free end.

[0011] Optionally, the resistance part includes an inner conical surface formed on the inner wall of the port of the first end, and an outer conical surface formed on the outer peripheral surface of the supporting ring body. The flared end of the inner conical surface faces inward, and the small diameter end of the outer conical surface is close to the spring-shaped capsule. The inner diameter of the flared end of the inner conical surface is not less than the outer diameter of the large diameter end of the outer conical surface, and the inner diameter of the narrowed end of the inner conical surface is less than the outer diameter of the large diameter end of the outer conical surface.

[0012] Optionally, the resistance part includes a capsule ring fixedly embedded on the outer wall of the support ring body. The capsule ring is provided with an inner tube three connected to its capsule cavity. The tube body of the inner tube three extends in the drainage lumen, and the free end of the inner tube three extends from a position close to the second end to the outside of the drainage lumen or is connected to the outside of the drainage lumen. Further, the cross section / radial section of the capsule ring is O-shaped.

[0013] Optionally, through holes are distributed and formed on the capsule wall of the deformable capsule, and each through hole penetrates the outer wall surface and the inner wall surface of the deformable capsule.

[0014] Optionally, after the deformation capsule is inflated, a recess is formed at a middle position of its inner wall surface, extending radially toward a side away from the axis, and the recess extends in a circumferential direction.

[0015] Optionally, the tube body of inner tube one and the tube body of inner tube two are both suspended in the drainage lumen. The end of inner tube one close to the second terminal is connected to branch tube one fixed on the drainage tube body, and the medium can be fed into and discharged from inner tube one through branch tube one. The end of inner tube two close to the second terminal is connected to branch tube two fixed on the drainage tube body, and the medium can be fed into and discharged from inner tube two through branch tube two. At this time, the tube body of inner tube one and the tube body of inner tube two can also be fixed on the inner wall of the drainage lumen, such as the tube body of inner tube one, the tube body of inner tube two and the drainage lumen are an integrated structure.

[0016] Optionally, the tube bodies of the inner tube 1 and the inner tube 2 are both suspended in the drainage lumen, so that one end of the inner tube 1 close to the second terminal and one end of the inner tube 2 close to the second terminal are both extended to the outside of the drainage lumen through the integrated tube.

[0017] The integrated tube comprises an externally threaded tube fixed on the drainage tube body, a spiral ring corresponding to and matching the externally threaded surface formed in the middle of the externally threaded tube, and a nut corresponding to and matching the externally threaded surface formed on the end of the externally threaded tube.

[0018] An axial column block is formed on the inner bottom surface of the nut and can be inserted into the shaft cavity of the external threaded tube. The outer circumference of the axial column block is opposite to the inner circumference of the shaft cavity, and the two circumferences can be in a contact matching form or in a matching form with a radial gap formed between the two circumferences.

[0019] A wall hole 1 is formed on the wall of the externally threaded pipe and on the side of the middle externally threaded surface away from the end head for the inner pipe 2 to extend out. The outer end of the wall hole 1 can be covered by screwing the screw ring, and the conduction state of the lumen of the inner pipe 2 can be blocked.

[0020] A wall hole 2 is formed on the tube wall of the external threaded tube and at the root side of the end head for the inner tube 1 to extend out. When the nut is screwed, the axial column block on the nut can cover the inner port of the wall hole 2 and block the conduction state of the tube cavity of the inner tube 1.

[0021] Optionally, the first inner tube is a spiral hose and / or the second inner tube is a spiral hose.

[0022] Optionally, a multi-step countersunk section is formed at the end of the spiral ring away from the end head and at the inner wall port. The multi-step countersunk section is a countersunk structure with more than three steps. An inner annular groove extending radially is formed at the axial middle position of the multi-step countersunk section.

[0023] Optionally, a multi-step cylindrical segment is formed on the free end side of the axial column block and at the end of the outer peripheral surface. The multi-step cylindrical segment is a cylindrical structure with more than three steps. The outer diameter of each step on the multi-step cylindrical segment tends to increase gradually from the free end side to the root side. An outer annular groove extending radially is formed at the axial middle position of the multi-step cylindrical segment.

[0024] The beneficial effects of the present invention are as follows: the present invention improves the structure of the drainage tube port so that the diameter of the drainage tube port can be adjusted and changed to form an expansion support structure, thereby ensuring smooth and stable drainage during the drainage process, and can also switch to a contracted state to ensure convenient insertion and removal of the drainage tube. In addition, the present invention also has the advantages of simple overall structure, convenient manufacturing and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention (only the drainage tube body is cut away).

[0026] Figure 2 It is a structural schematic diagram of the state in which the balloon assembly is configured at the end of the drainage tube body.

[0027] Figure 3 It is a structural schematic diagram of state 2 in which the balloon assembly is configured at the end of the drainage tube body.

[0028] Figure 4 The third structural schematic diagram is a state where the balloon assembly is configured at the end of the drainage tube body.

[0029] Figure 5 Schematic diagram of the process of inserting the balloon assembly into the drainage tube body.

[0030] Figure 6 Schematic diagram of the cross-sectional structure of the integrated tube.

[0031] In the figure: 10 drainage tube body, 11 first end head, 12 second end head, 13 drainage tube cavity; 20 capsule assembly, 21 support ring body, 22 spring-shaped capsule body, 23 deformable capsule body, 231 inner wall surface, 232 through hole, 233 recess, 24 inner tube one, 25 inner tube two, 26 branch tube one, 27 branch tube two; 30 resistance part, 31 inner conical surface, 32 outer conical surface, 33 capsule ring; 40 integrated tube, 41 external threaded tube, 411 wall hole one, 412 wall hole two, 413 end head, 414 axial cavity, 42 spiral ring, 421 multi-step countersunk hole section, 4211 inner annular groove, 43 nut, 431 inner threaded surface, 432 axial column block, 433 multi-step cylindrical section, 4331 outer annular groove. DETAILED DESCRIPTION

[0032] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention. At the same time, the terms such as "upper", "lower", "front", "back", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical contents.

[0033] like Figures 1 to 5 The drainage tube shown includes a drainage tube body 10 , a balloon assembly 20 and a resistance portion 30 .

[0034] The drainage tube body 10 includes a first end 11 and a second end 12 which are relatively distributed at two ends of the drainage tube cavity 13. When in use, the first end 11 is used to be inserted into a body cavity or between tissues, and the second end 12 is retained outside the body. Therefore, when the capsule assembly 20 is fixedly configured in the drainage tube cavity 13, it should be close to the port position of the first end 11.

[0035] The capsule assembly 20 includes a supporting ring body 21, a spring-shaped capsule 22 (also called a cylindrical spring-shaped capsule) and a deformable capsule 23 which are interconnected, and the spring-shaped capsule 22 is placed between the supporting ring body 21 and the deformable capsule 23, and the supporting ring body 21 is on the side away from the first end head 11, that is, (in the initial state) the deformable capsule 23 is relatively close to the port of the first end head 11.

[0036] The supporting ring body 21, the spring-shaped capsule body 22 and the deformable capsule body 23 may be an integral structure formed in one piece, or an integral structure formed by physical connection methods such as welding and bonding. Figure 1 , Figure 2 , which is a schematic diagram of the matching structure of the bladder assembly 20 and the drainage tube body 10 in the initial state and in the contracted state.

[0037] The annular cavity of the support ring 21, the annular cavity of the spring-shaped capsule 22 (when fully inflated) and the capsule cavity (a trumpet-shaped channel) of the deformable capsule 23 (when fully inflated) can be connected to form an axially through cavity, and the cavity is connected with the drainage tube cavity 13 to form an axially through drainage channel. Figure 3 , Figure 4 , which is a schematic diagram of the matching structure of the spring-shaped capsule 22, the deformable capsule 23, etc. of the capsule assembly 20 and the drainage tube body 10 in a fully expanded state.

[0038] The support ring body 21 is matched with the inner wall of the drainage tube cavity 13 through the resistance part 30, which can prevent the support ring body 21 from slipping out of the drainage tube cavity 13 from the port of the first end head 11. In other words, it can prevent the support ring body 21 from slipping out of the port of the first end head 11 to the outside of the drainage tube body 10.

[0039] The spring-shaped capsule 22 is provided with an inner tube 1 24 connected to its capsule cavity, and the deformable capsule 23 is provided with an inner tube 25 connected to its capsule cavity. The tube bodies of the inner tube 1 24 and the inner tube 2 25 are both extended in the drainage lumen 13, or the free ends of the inner tube 1 24 and the free ends of the inner tube 2 25 are respectively extended from the position close to the second end 12 to the outside of the drainage lumen 13, see Figure 6 or the free end of the inner tube 24, the free end of the inner tube 25 are connected to the drainage lumen 13 from a position close to the second end 12, see Figure 1 shown.

[0040] like Figure 1 As shown, the tube body of the inner tube 1 24 and the tube body of the inner tube 2 25 are both fixed on the inner wall of the drainage lumen 13 to form an integral structure. Figures 2 to 6 As shown, the tube body of the inner tube 1 24 and the tube body of the inner tube 2 25 are both detached from the inner wall of the drainage lumen 13 and can move in the drainage lumen 13. At this time, the tube body can be suspended in the drainage lumen 13 in a relatively matched state.

[0041] The spring-shaped capsule 22 is cylindrical. When the spring-shaped capsule 22 switches between the contracted state and the expanded state, its axial length can be extended and shortened, and its volume can be increased and decreased. The axial length of the spring-shaped capsule 22 in the contracted state is significantly smaller than its axial length in the expanded state; at the same time, the inner diameter of the axial cavity of the spring-shaped capsule 22 in the contracted state is smaller than the inner diameter of the axial cavity of the spring-shaped capsule 22 in the expanded state.

[0042] When the spring-shaped capsule 22 is switched to a fully expanded state, it is in a cylindrical shape and can push the deformable capsule 23 to the outside of the port of the first end 11. The deformable capsule 23 can expand into a trumpet-shaped structure outside the drainage tube cavity 13, and the expanded end of the trumpet-shaped structure is a free end. Moreover, the capsule passage of the deformable capsule 23 in the expanded state is also trumpet-shaped, that is, at this time, the overall shape of the deformable capsule 23, the outer wall surface and its inner wall surface 231 are all trumpet-shaped, see Figure 3 shown.

[0043] Through holes 232 are distributed and formed on the wall of the deformable capsule 23, and the through holes 232 penetrate the outer wall surface and the inner wall surface 231 of the deformable capsule 23. When the deformable capsule 23 is inflated, the liquid can flow toward the inner wall surface 231 of the deformable capsule 23 through the trumpet-shaped port of the deformable capsule 23 and the distributed numerous through holes 232, and flow toward the contraction side of the trumpet-shaped passage of the deformable capsule 23, and after flowing through the cylindrical cavity of the spring-shaped capsule 22 and the inner hole of the support ring body 21 in sequence, it flows into the drainage lumen 13, and is finally drained out of the body.

[0044] By arranging the capsule assembly 20 in the drainage tube body 10, and in the initial state, the capsule assembly 20 can be retracted into the drainage tube cavity 13 as a whole, so as to facilitate the insertion and placement of the drainage tube. After the first terminal 11 is inserted into the body cavity or tissue, the fluid medium is injected from the free end port of the inner tube 1 24, and the spring-shaped capsule 22 is first controlled to gradually expand, gradually expand, and axially extend, and the deformed capsule 23 is gradually pushed out of the port of the first terminal 11. After the deformed capsule 23 is completely or mostly pushed out of the drainage tube cavity 13, the fluid medium is injected from the free end port of the inner tube 2 25 to control the deformed capsule 23 to gradually expand and stretch to form a trumpet-shaped structure. Because the deformable capsule 23 is trumpet-shaped after being fully inflated and the expanded mouth of the trumpet is a free end, it can not only promote the relative expansion of the port of the drainage tube, but also push outward the tissues, cavity walls, etc. outside the port, and effectively prevent the port from being covered or covered, and stably and reliably ensure smooth drainage. Preferably, a plurality of grooves can be formed at the trumpet-shaped port of the deformable capsule 23, and the plurality of grooves are alternately distributed along the circumferential direction, so as to improve the ability of the deformable capsule 23 to prevent the port of the drainage tube from being covered or covered, and stably and reliably ensure smooth drainage.

[0045] After the spring-shaped capsule 22 is fully inflated, the inner circumference of its capsule wall can form a smooth surface. After the deformable capsule 23 is fully inflated, the entire inner wall surface 231 of its capsule wall can be formed into a smooth surface. After the deformable capsule 23 is fully inflated, the specific trumpet-shaped three-dimensional structure formed has been determined in the pre-design process and is a pre-formed component. In addition, the trumpet-shaped structure formed by the inflated deformable capsule 23 can be pre-set into multiple specific schemes due to the changes in the subtle parts, such as Figure 3 , Figure 4 As shown, only two specific solutions are shown, which cannot limit the scope of protection of the present invention.

[0046] When in use, the free end of the inner tube 25 connected to the deformable sac 23 can be connected to a pulse pump, so that the deformable sac 23 can periodically produce elastic expansion and contraction in the inflated state, prompting the sac wall and tissue near the port to passively produce peristalsis, and passively change the position state relative to the outer edge of the port, so as to better inhibit the port of the drainage tube from being covered or wrapped, better ensure the stability of the drainage state, and improve the use / drainage effect.

[0047] During the drainage process, the spring-shaped capsule 22 and the deformable capsule 23 are both kept in an inflated state. When the drainage is finished and the drainage tube needs to be pulled out, the fluid medium is extracted from the free end port of the inner tube 25, and the deformable capsule 23 is first controlled to shrink to the initial state, that is, fully shrink so that its volume is significantly reduced, and then the fluid medium is extracted from the free end port of the inner tube 1 24, and the spring-shaped capsule 22 is controlled to shrink gradually, so that the deformable capsule 23 can be pulled back into the port of the first end 11 and retracted into the drainage tube cavity 13, and finally the first end 11 can be pulled out. In view of the fact that the end of the drainage tube of the present invention can undergo expansion and contraction changes, it has certain requirements in terms of clinical application scenarios.

[0048] The through holes 232 are distributed on the deformable capsule 23. On the one hand, the flow cross-section of the deformable capsule 23 can be significantly increased, the drainage speed can be increased, and the drainage effect can be improved; on the other hand, the difficulty of the flow cross-section port on the deformable capsule 23 being excessively sealed or wrapped can be increased, and the drainage can be ensured to be smooth in a more stable and reliable manner.

[0049] like Figure 1 As shown, the end of the inner tube 1 24 close to the second terminal 12 is connected to the branch tube 1 26 fixedly arranged on the drainage tube body 10, and the medium (generally liquid medium) can be fed into the inner tube 1 24 and discharged / extracted through the branch tube 1 26, so that the spring-shaped capsule 22 changes between the expanded state and the contracted state. The end of the inner tube 2 25 close to the second terminal 12 is connected to the branch tube 2 27 fixedly arranged on the drainage tube body 10, and the medium (generally liquid medium) can be fed into the inner tube 2 25 and discharged / extracted through the branch tube 2 27, so that the deformable capsule 23 changes between the expanded state and the contracted state. Caps are provided at the ports of the branch tube 1 26 and the ports of the branch tube 2 27, and the ports of the branch tube 1 26 and the branches 2 27 can be blocked by the caps.

[0050] like Figures 2 to 6 As shown, one end of the inner tube 1 24 close to the second terminal 12 and one end of the inner tube 2 25 close to the second terminal 12 are extended to the outside of the drainage tube cavity 13 through the integrated tube 40 fixed on the drainage tube body 10. At this time, it is convenient to connect the inner tube 1 24 and the inner tube 2 25 with external equipment, and at the same time, the conduction state of the inner tube 1 24 and the inner tube 2 25 can be controlled, which can provide great convenience for operation and use.

[0051] like Figure 6As shown, the integrated tube 40 includes an externally threaded tube 41 fixedly mounted on the drainage tube body 10, a screw ring 42 corresponding to and matching the externally threaded surface formed in the middle of the externally threaded tube 41, and a nut 43 corresponding to and matching the externally threaded surface formed on the end 413 of the externally threaded tube 41. An axial column block 432 is formed on the inner bottom surface of the nut 43, which can extend into the axial cavity 414 of the externally threaded tube 41. The internal thread surface 431 of the nut 43 matches the end 413 through a threaded structure. The axial extension length of the axial column block 432 is greater than the axial extension length of the nut body of the nut 43.

[0052] A wall hole 1 411 is formed on the wall of the externally threaded tube 41 and on the side of the externally threaded surface in the middle away from the end 413 for the inner tube 25 to extend out. The screw ring 42 can be screwed to cover the outer end of the wall hole 1 411 and block the conductive state of the inner tube 25, so that the deformable capsule 23 can be stably maintained in a fully expanded state, and the inner wall surface 231 of the deformable capsule 23 can be kept smooth and smooth to ensure the drainage effect.

[0053] A second wall hole 412 is formed on the tube wall of the externally threaded tube 41 and at the root side of the end 413 for the inner tube 1 24 to extend out. When the nut 43 is screwed, the axial column block 432 thereon can cover the inner port of the second wall hole 412 and block the conduction state of the inner tube 1 24, so that the spring-shaped capsule 22 can be stably maintained in a fully expanded state, and the inner wall of the spring-shaped capsule 22 can be kept smooth and smooth to ensure the drainage effect.

[0054] In order to improve the blocking effect of the spiral ring 42 on the conductive state of the inner tube 25, and to improve the blocking effect of the nut 43 on the conductive state of the inner tube 1 24, and to better ensure that the wall surface of the spring-shaped capsule 22 and the wall surface of the deformed capsule 23 are stably and reliably maintained in a smooth state, the following design can be specifically made.

[0055] like Figure 6As shown, a multi-step counterbore section 421 is formed on the spiral ring 42 and at the inner wall port on the end side away from the end head 413. The multi-step counterbore section 421 is a three-step counterbore structure, and an inner annular groove 4211 extending radially is formed at the axial middle position of the multi-step counterbore section 421 (on the side wall near the middle first-step counterbore on the multi-step counterbore section 421). At the same time, a multi-step cylindrical section 433 is formed on the axial column block 432 and at the end of the outer peripheral surface on the free end side. The multi-step cylindrical section 433 is a three-step cylindrical structure, and the outer diameter of each step is gradually increased from the free end side to the root side (from top to bottom in the figure). An outer annular groove 4331 extending radially is formed at the axial middle position of the multi-step cylindrical section 433 (on the outer wall near the middle first-step cylinder on the multi-step cylindrical section 433).

[0056] After the inner annular groove 4211 is provided, when the screw ring 42 covers the inner tube 25 inside, the tube body of the inner tube 25 can be bent, and the tube wall at the bent position will extend into the inner annular groove 4211, making the conduction and blocking state of the inner tube 25 more stable and reliable. Similarly, after the outer annular groove 4331 is provided, when the nut 43 rolls the inner tube 1 24 inside, the tube body of the inner tube 1 24 can be bent, and the tube wall at the bent position will extend into the outer annular groove 4331, making the conduction and blocking state of the inner tube 1 24 more stable and reliable.

[0057] like Figure 1 , Figure 5 As shown, the resistance part 30 includes an inner conical surface 31 formed on the inner wall of the port of the first end head 11, and an outer conical surface 32 formed on the outer peripheral surface of the support ring body 21. The flared end of the inner conical surface 31 faces inward, and the small diameter end of the outer conical surface 32 is close to the spring-shaped capsule 22. The inner diameter of the flared end of the inner conical surface 31 is larger than the outer diameter of the large diameter end of the outer conical surface 32, and the inner diameter of the narrowed end of the inner conical surface 31 is smaller than the outer diameter of the large diameter end of the outer conical surface 32. Figure 5 As shown, the resistance part 30 may also include a bag ring 33 fixedly embedded on the outer wall of the support ring body 21. The bag ring 33 is provided with an inner tube 3 (not shown in the figure) connected to its bag cavity. The tube body of the inner tube 3 extends in the drainage lumen 13, and the free end of the inner tube 3 extends from a position close to the second terminal 12 to the outside of the drainage lumen 13. The cross section / radial section of the bag ring 33 is O-shaped.

[0058] The connection relationship between the inner tube three and the tube wall of the drainage tube body 10 can refer to the inner tube one 24 and the inner tube two 25. For example, a branch tube three can be set on the drainage tube body 10 at the same time, and the free end of the inner tube three (i.e., the end close to the second terminal 12) can be connected to the branch tube three, and the medium (generally liquid medium) can be fed into the inner tube three and the medium can be discharged-extracted through the branch tube three, so that the capsule ring 33 changes between the expanded state and the contracted state. When the capsule ring 33 expands, its outer diameter can be significantly enlarged, so that the outer diameter of the support ring body 21 is enlarged, so that the support ring body 21 and the inner wall of the drainage tube cavity 13 form an elastic interference matching relationship, which helps to promote the support ring body 21 to be firmly supported in the drainage tube cavity 13, and improve the firmness and reliability of the fixed connection state between the capsule assembly 20 and the drainage tube body 10. For another example, one end of the inner tube 1 24 close to the second terminal 12, one end of the inner tube 25 close to the second terminal 12, and one end of the inner tube 3 close to the second terminal 12 can all be extended to the outside of the drainage tube cavity 13 through the integrated tube 40 fixed on the drainage tube body 10.

[0059] In summary, the resistance part 30 can be an implementation scheme including the inner conical surface 31 and the outer conical surface 32, or an implementation scheme including the inner conical surface 31, the outer conical surface 32 and the capsule ring 33, or an implementation scheme including only the capsule ring 33. When the resistance part 30 is only composed of the capsule ring 33, it is easy to make the support ring 21 or the fixed connection state between the capsule assembly 20 and the drainage tube body 10 more controllable and more convenient to operate. When the capsule ring 33 is inflated, it can ensure that the capsule assembly 20 is firmly and reliably fixedly connected with the drainage tube body 10, ensure the normal drainage operation, and prevent the capsule assembly 20 from slipping out of the drainage tube cavity 13, ensuring safe use. On the contrary, when the balloon ring 33 is caused to contract, the fixed connection state between the balloon assembly 20 and the drainage tube body 10 can be easily released, and the balloon assembly 20 can be easily pulled out from the drainage tube cavity 13 to solve the problem of serious blockage at one or more locations in the drainage tube cavity 13, which adversely affects the smooth drainage. At that time, the balloon assembly 20 can be replaced or cleaned according to the situation, and then pushed back into the position close to the first end 11 in the drainage tube cavity 13. Therefore, the present invention can also solve the problem of blockage inside the lumen of the drainage tube, and can be better applied to scenes with a high probability of blockage in the lumen of the anal drainage tube, intestinal drainage tube, etc.

[0060] In order to increase the difficulty of the trumpet-shaped port on the deformable capsule 23 being over-sealed or over-wrapped, the purpose of ensuring smooth drainage in a more stable and reliable manner is achieved. On the inner wall surface 231 of the trumpet-shaped structure formed after the deformable capsule 23 is inflated, and at the middle position of the inner wall surface 231, a recess 233 extending radially away from the axis is formed, and the recess 233 extends around the circumferential direction. After the recess 233 is set, the tissue surrounding the trumpet-shaped port will first creep and fill into the recess 233, and will not block the axial cavity of the trumpet-shaped cavity of the deformable capsule 23 too quickly, so that the smooth drainage can be effectively ensured. When combined with the scheme of distributing the through holes 232, the anti-blocking and anti-wrapping capabilities can be further improved, as well as the drainage effect.

[0061] The inner tube 1 24 is a spiral hose, or the inner tube 2 25 is a spiral hose. If an inner tube 3 is also provided, then one of the inner tube 1 24, the inner tube 2 25, and the inner tube 3 can be a spiral hose. At the same time, it is also preferred that the inner tube formed as a spiral hose is in a suspended state relative to the drainage lumen 13, and the other two inner tubes are fixed on the inner wall of the drainage lumen 13. Setting one inner tube as a spiral hose allows the inner tube to be able to stretch and deform in the drainage lumen 13, which helps to overcome / alleviate the problem of blockage in the drainage lumen 13 by pulling the spiral inner tube when a serious blockage occurs somewhere in the lumen of the drainage lumen 13, which is convenient and effective.

[0062] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. The present invention can be improved in many aspects without violating the overall concept, and those familiar with the technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A drainage tube, comprising a drainage tube body (10), wherein the drainage tube body (10) comprises a first end (11) and a second end (12); characterized in that: It also includes a capsule assembly (20) fixedly disposed in the drainage tube cavity (13) of the drainage tube body (10) and close to the first end (11), and a resistance portion (30); The capsule assembly (20) comprises a supporting ring body (21), a spring-shaped capsule body (22) and a deformable capsule body (23) connected in sequence, wherein the supporting ring body (21) is located on a side of the port opposite to the first end head (11); the annular cavity of the supporting ring body (21), the annular cavity of the spring-shaped capsule body (22) and the capsule cavity of the deformable capsule body (23) can be connected to form an axially penetrating cavity that is in communication with the drainage tube cavity (13); The support ring body (21) and the inner wall of the drainage tube cavity (13) are matched via the resistance portion (30), thereby preventing the support ring body (21) from slipping out of the drainage tube cavity (13) from the port of the first end head (11); The spring-shaped capsule (22) is provided with an inner tube 1 (24) in communication with its capsule cavity, and the deformable capsule (23) is provided with an inner tube 2 (25) in communication with its capsule cavity; the tube body of the inner tube 1 (24) and the tube body of the inner tube 2 (25) both extend in the drainage tube cavity (13), and the free ends of the inner tube 1 (24) and the free ends of the inner tube 2 (25) are respectively connected to the outside of the drainage tube cavity (13) from positions close to the second end head (12); The spring-shaped capsule (22) is cylindrical; when the spring-shaped capsule (22) is switched to an extended state, the deformed capsule (23) can be pushed out of the port of the first end (11); the deformed capsule (23) can be expanded into a trumpet-shaped structure outside the drainage tube cavity (13), and the expanded end of the trumpet-shaped structure is a free end; The tube body of the inner tube 1 (24) and the tube body of the inner tube 2 (25) are both suspended in the drainage tube cavity (13); one end of the inner tube 1 (24) close to the second end head (12) and one end of the inner tube 2 (25) close to the second end head (12) are both extended outward from the drainage tube cavity (13) through the integrated tube (40), so that the free end ports of the inner tube 1 (24) and the inner tube 2 (25) are respectively extended to the outside of the drainage tube cavity (13); The integrated tube (40) comprises an externally threaded tube (41) fixedly mounted on a drainage tube body (10), a screw ring (42) corresponding to and matching the externally threaded surface formed in the middle of the externally threaded tube (41), and a nut (43) corresponding to and matching the externally threaded surface formed on an end (413) of the externally threaded tube (41); an axial column block (432) capable of extending into an axial cavity (414) of the externally threaded tube (41) is formed on the inner bottom surface of the nut (43); A wall hole (411) for the inner tube (25) to extend out is formed on the wall of the externally threaded tube (41) and on the side of the middle externally threaded surface away from the end (413); the outer end of the wall hole (411) can be covered by screwing the screw ring (42), and the conductive state of the inner tube (25) can be blocked; A second wall hole (412) is formed on the tube wall of the external threaded tube (41) and at the root side of the end head (413) for the first inner tube (24) to extend out; when the nut (43) is screwed, the axial column block (432) can cover the inner end of the second wall hole (412) and block the conduction state of the first inner tube (24).

2. A drainage tube according to claim 1, characterized in that: The resistance portion (30) comprises an inner conical surface (31) formed on the inner wall of the port of the first end head (11), and an outer conical surface (32) formed on the outer peripheral surface of the support ring body (21); the flared end of the inner conical surface (31) faces inward, and the small diameter end of the outer conical surface (32) is close to the spring-shaped capsule (22); the inner diameter of the flared end of the inner conical surface (31) is not less than the outer diameter of the large diameter end of the outer conical surface (32), and the inner diameter of the narrowed end of the inner conical surface (31) is less than the outer diameter of the large diameter end of the outer conical surface (32).

3. A drainage tube according to claim 1 or 2, characterized in that: The resistance part (30) comprises a bag ring (33) fixedly embedded on the outer wall of the support ring body (21); the bag ring (33) is provided with an inner tube three connected to its bag cavity; the tube body of the inner tube three extends in the drainage tube cavity (13), and the free end of the inner tube three is connected to the outside of the drainage tube cavity (13) from a position close to the second end head (12).

4. A drainage tube according to claim 3, characterized in that: The cross section of the capsule ring (33) is O-shaped.

5. The drainage tube according to claim 1, characterized in that: Through holes (232) are distributed and formed on the wall of the deformable capsule (23), and the through holes (232) penetrate between the outer wall surface and the inner wall surface (231) of the deformable capsule (23).

6. A drainage tube according to claim 1, characterized in that: After the deformable capsule (23) is inflated, a recess (233) is formed at the middle position of its inner wall surface (231) and extends radially toward a side away from the axis, and the recess (233) extends in a circumferential direction.

7. The drainage tube according to claim 1, characterized in that: The inner tube 1 (24) is a spiral hose and / or the inner tube 2 (25) is a spiral hose.

8. The drainage tube according to claim 1, characterized in that: A multi-step countersunk hole section (421) is formed at the end of the spiral ring (42) away from the end head (413) and at the inner wall port, so that the multi-step countersunk hole section (421) is a countersunk hole structure with more than three steps, and an inner annular groove (4211) extending radially is formed in the axial middle position of the multi-step countersunk hole section (421); and / or, a multi-step cylindrical surface section (433) is formed at the free end of the axial column block (432) and at the end of the outer peripheral surface, so that the multi-step cylindrical surface section (433) is a cylindrical surface structure with more than three steps, and the outer diameter of each step tends to increase gradually from the free end side to the root side, and an outer annular groove (4331) extending radially is formed in the axial middle position of the multi-step cylindrical surface section (433).

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