Drainage catheter, drainage device and drainage method

Abstract

The present invention relates to the technical field of medical devices, and discloses a drainage catheter, a drainage device, and a drainage method. The drainage catheter includes a catheter body, the catheter body includes a drainage end and a connecting end, a first channel penetrating the drainage end and the connecting end is provided in the catheter body; a connector is detachably connected to the connecting end, and a second channel is provided in the connector; an adapter assembly is sleeved on the connecting end and abuts against the connector, and the adapter assembly is connected to the catheter body; wherein the first channel is connected to the second channel and forms a drainage cavity. The above-mentioned drainage catheter can drain body fluids at the lesion through the drainage end. Since the connector and the adapter assembly are detachably connected to the connecting end, the connecting end can be connected to the connector and the adapter assembly after passing through the subcutaneous tunnel, thereby reducing the chance of tube detachment and reducing the risk of infection, and effectively improving the technical problem that the current multi-cavity drainage catheter cannot be drained through the subcutaneous tunnel.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a drainage catheter, a drainage device and a drainage method. Background Art

[0002] Extracorporeal drainage of cerebrospinal fluid is one of the most commonly used treatment techniques in neurosurgery. The traditional drainage method is to insert a drainage catheter directly at the cranial puncture point, which is prone to wound infection and cannot fix the drainage tube, which may easily become dislodged. Therefore, by establishing a subcutaneous tunnel, a certain distance is created between the scalp puncture point and the drainage catheter outlet, and the drainage catheter outlet can be moved to a more suitable and advantageous position. The puncture point and the drainage catheter outlet are connected through the subcutaneous tunnel, and the subcutaneous tunnel itself forms a barrier to prevent infection, which can effectively prevent infection caused by external factors and reduce the risk of infection. In addition, the drainage catheter is guided out of the body through the subcutaneous tunnel, and the fixation of the subcutaneous tissue reduces the chance of tube dislodgment.

[0003] However, conventional multi-lumen drainage catheters cannot pass through the subcutaneous tunnel due to the large size of the drainage rear end, thus failing to achieve subcutaneous tunnel drainage. Summary of the Invention

[0004] The purpose of the present invention is to provide a drainage catheter, a drainage device and a drainage method, aiming to solve the technical problem in the prior art that multi-lumen drainage catheters cannot drain through subcutaneous tunnels.

[0005] To achieve the above objectives, in a first aspect, an embodiment of the present invention provides a drainage catheter for draining fluid through a subcutaneous tunnel, the drainage catheter comprising:

[0006] A catheter body, the catheter body comprising a drainage end and a connecting end, wherein a first channel is provided in the catheter body and passes through the drainage end and the connecting end;

[0007] a connector, detachably connected to the connecting end, and having a second channel disposed therein;

[0008] An adapter component is sleeved on the connecting end and abuts against the connecting head, and the adapter component is communicated with the catheter body.

[0009] The first channel is connected to the second channel to form a drainage cavity, and the drainage cavity is used to drain body fluid out of the body.

[0010] The above-mentioned drainage catheter can drain body fluids at the lesion through the drainage end. Since the adapter assembly and the connector can be detachably connected to the connecting end, the connecting end can be passed through the subcutaneous tunnel and then connected to the adapter assembly and the connector, so that part of the catheter body can be fixed in position through the subcutaneous tunnel, thereby reducing the chance of tube dislocation and reducing the risk of infection, effectively improving the technical problem that the current multi-lumen drainage catheter cannot drain through the subcutaneous tunnel.

[0011] In one embodiment, the catheter body includes a hose, a connector, and a connector. The drainage end is located on the hose, the connection end is located on the connector, and the connector connects the hose and the connector. In this way, the catheter body can achieve both the flexibility of the hose and the stability of the connection between the connection end and the connector on the connector.

[0012] In one embodiment, a first connection hole is defined in a side wall of the hose, and a second connection hole is defined in a side wall of the connector. Both the first and second connection holes are arranged parallel to the first passage, and the ends of the connector are inserted into the first and second connection holes, respectively. The ends of the connector are fixed in the first and second connection holes, respectively, to maintain the relative position of the hose and connector, thereby ensuring the stability of the first passage.

[0013] In one embodiment, the connector is provided with a connecting channel, wherein the first connecting hole, the connecting channel, and the second connecting hole are sequentially connected to form a conducting cavity, which is independent of the drainage cavity. In this way, the catheter body can be provided with multiple cavities, each of which is independent of the other and does not affect each other during use.

[0014] In one embodiment, a first through hole communicating with the conducting cavity is provided on a side wall of the connector;

[0015] The adapter assembly includes an adapter with a cavity and a branch tube mounted on the adapter. The branch tube has a third channel disposed within it. The connector passes through the cavity, and the third channel communicates with the first through-hole. Thus, the third channel communicates with the conduction cavity, thereby achieving the multi-lumen function of the drainage catheter.

[0016] In one embodiment, a blocking portion is provided at one end of the adapter facing the connector, and the blocking portion abuts against a side wall of the connector;

[0017] The adapter assembly further includes a stopper disposed within the cavity, the stopper being configured to position the connector so that the third channel, which faces one end of the connector, communicates with the first through-hole. Because the blocking portion and the stopper allow the connector to be positioned within the adapter at a predetermined position, the third channel, which faces one end of the connector, accurately communicates with the first through-hole.

[0018] In one embodiment, the adapter has a recessed portion on its inner wall, the stopper engages with the recessed portion, and a through-hole is formed in the stopper. The connector has a stopper surface on its outer wall that mates with the inner wall of the through-hole. This allows the connector to penetrate the stopper at a predetermined angle, preventing the connector from rotating within the through-hole.

[0019] In one embodiment, the position-limiting member includes a sealing portion and a fixing portion. The sealing portion abuts the blocking portion, and the sidewall of the sealing portion is provided with at least one second through-hole, which communicates with the first through-hole and the third channel. The fixing portion is provided at the end of the adapter away from the blocking portion, so that the connector is sequentially passed through the fixing portion and the sealing portion according to a predetermined position, and the sealing portion and the connector have an interference fit. This ensures the positional accuracy of the connector, the connectivity between the first through-hole and the third channel, and the sealing between the connector and the adapter.

[0020] In one embodiment, the drainage catheter further comprises a balloon provided at the drainage end, the balloon being in communication with the conduction cavity;

[0021] The branches are symmetrically arranged as injection and drainage branches. The injection branch is used for injection and cleaning, and the drainage branch is equipped with an indicator balloon for monitoring the status of the balloon. The injection and drainage branches enable the drainage catheter to function as a multi-lumen device, providing more possibilities for its use and enhancing its practicality.

[0022] In a second aspect, an embodiment of the present invention further provides a drainage device, comprising: a drainage catheter as described in any of the above embodiments;

[0023] a subcutaneous tunnel needle detachably connected to the connecting end; and

[0024] A drainage line and a drainage bag, one end of the drainage line is connected to the connector and communicates with the drainage cavity, and the drainage bag is connected to the other end of the drainage line.

[0025] The drainage device proposed in the embodiment of the present invention can drain body fluids at the drainage end at the lesion site. Since the subcutaneous tunnel needle, the adapter assembly and the connector can be detachably connected to the connecting end, the subcutaneous tunnel needle can be connected to the connecting end first. The connecting end can then pierce the skin with the subcutaneous tunnel needle and sneak through the skin again after a preset distance. That is, the connecting end is connected to the adapter assembly and the connector after passing through the subcutaneous tunnel, so that part of the catheter body is fixed in position through the subcutaneous tunnel, thereby reducing the chance of tube disengagement and reducing the risk of infection. Continuous extracorporeal drainage can be performed, effectively improving the technical problem that the current multi-lumen drainage catheter cannot drain through the subcutaneous tunnel.

[0026] In a third aspect, an embodiment of the present invention further provides a drainage method, using the drainage device, comprising:

[0027] placing the drainage end of the catheter body into the lesion;

[0028] Connecting the subcutaneous tunnel needle to the connecting end, so that the subcutaneous tunnel needle pierces the skin and passes through the skin after sneaking a preset distance, and part of the catheter body passes through the skin along with the subcutaneous tunnel needle;

[0029] Remove the subcutaneous tunnel needle, sleeve the adapter assembly onto the connection end, and connect the connector to the connection end;

[0030] The drainage pipeline is connected to the connector, and the drainage bag is connected to one end of the drainage pipeline, so that the drainage bag, the drainage pipeline, and the drainage cavity are communicated.

[0031] The drainage catheter and drainage device and the method of use thereof proposed in the embodiments of the present invention are such that the subcutaneous tunnel needle, the adapter assembly and the connector can be detachably connected to the connecting end of the catheter body. Thus, the subcutaneous tunnel needle can be connected to the connecting end first, and the connecting end can then pierce the skin with the subcutaneous tunnel needle and sneak through a preset distance before passing through the skin again, so that the connecting end of the catheter body can be kept away from the puncture point, thereby reducing the chance of tube disengagement and the risk of infection. After removing the subcutaneous tunnel needle, the connecting end of the catheter body can be connected to the adapter assembly and the connector, and the size limitations of the adapter assembly and the connector can be ignored, effectively improving the technical problem that the current multi-lumen drainage catheter cannot drain through the subcutaneous tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A three-dimensional schematic diagram of a drainage catheter provided in an embodiment of the present invention;

[0034] Figure 2 for Figure 1 A schematic three-dimensional diagram of a catheter body in the drainage catheter shown;

[0035] Figure 3 for Figure 1 A three-dimensional schematic diagram of a connector in a drainage catheter is shown;

[0036] Figure 4 for Figure 1A cross-sectional view of a portion of the catheter body of the drainage catheter shown;

[0037] Figure 5 for Figure 1 A schematic exploded perspective view of a portion of the main body of the drainage catheter shown;

[0038] Figure 6 for Figure 1 A three-dimensional schematic diagram of a connector in a drainage catheter is shown;

[0039] Figure 7 for Figure 1 Another perspective schematic diagram of the connector in the drainage catheter shown;

[0040] Figure 8 for Figure 1 A three-dimensional schematic diagram of the adapter assembly in the drainage catheter shown;

[0041] Figure 9 for Figure 8 A cross-sectional view of the adapter assembly shown;

[0042] Figure 10 for Figure 8 An exploded perspective view of the adapter assembly shown;

[0043] Figure 11 for Figure 10 A three-dimensional schematic diagram of the adapter in the adapter assembly shown in another angle;

[0044] Figure 12 for Figure 10 A bottom view of the fixed portion of the adapter assembly shown;

[0045] Figure 13 Schematic diagram of the subcutaneous tunnel needle and catheter body;

[0046] Figure 14 for Figure 13 A partial enlarged view of the structure shown in middle A;

[0047] Figure 15 A three-dimensional schematic diagram of a drainage device provided in an embodiment of the present invention.

[0048] The meanings of the marks in the figure are:

[0049] 100. Drainage catheter;

[0050] 10. Catheter body; 11. First channel; 12. Hose; 13. Connector; 131. First through hole; 132. Position-limiting end surface; 14. Connector; 141. Connecting channel; 15. First connecting hole; 16. Second connecting hole; 17. Structural member; 18. Position-limiting surface;

[0051] 101. drainage end; 102. connection end;

[0052] 20. Connector; 21. Second channel;

[0053] 30. Adapter assembly; 31. Sealing gasket; 32. Cavity; 33. Adapter; 34. Branch pipe; 35. Third channel; 36. Blocking portion; 361. Limiting hole; 37. Limiting member; 371. Through hole; 372. Sealing portion; 373. Fixing portion; 374. Second through hole; 38. Recessed portion;

[0054] 40. Drainage hole;

[0055] 50. Injection hole;

[0056] 200, drainage device;

[0057] 60. Subcutaneous tunnel needle;

[0058] 70. Drainage tube;

[0059] 80. Drainage bag. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings, i.e., embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0061] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of description and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the patent. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0062] In order to illustrate the technical solution of the present invention, the following description is given with reference to specific drawings and embodiments.

[0063] First, refer to Figures 1 to 4 An embodiment of the present invention provides a drainage catheter 100 for draining body fluids from a cerebral hematoma cavity, a brain tumor cavity, or a lateral ventricle through a subcutaneous tunnel. The body fluid may be, but is not limited to, cerebrospinal fluid or a hematoma. Drainage catheter 100 includes a catheter body 10, a connector 20, and an adapter assembly 30.

[0064] The catheter body 10 includes a drainage end 101 and a connecting end 102 . A first channel 11 penetrating the drainage end 101 and the connecting end 102 is defined in the catheter body 10 .

[0065] The connector 20 is detachably connected to the connecting end 102 , and a second channel 21 is defined in the connector 20 .

[0066] The adapter assembly 30 is sleeved on the connecting end 102 and abuts against the connector 20 , and the adapter assembly 30 is communicated with the catheter body 10 .

[0067] The first channel 11 is connected to the second channel 21 to form a drainage cavity, which is used to drain body fluid out of the body.

[0068] It can be understood that in this embodiment, the connecting end 102 is detachably connected to the adapter assembly 30 and the connector 20 after passing through the subcutaneous tunnel. Therefore, the shape and size of the connector 20 and the adapter assembly 30 are not limited and can be selected according to actual needs.

[0069] Please refer to Figure 2 and Figure 3 In this embodiment, the connector 20 and the connection end 102 are connected by a threaded connection, wherein one end of the connector 20 is provided with an internal thread, and the connection end 102 is provided with an external thread. It is understood that in other embodiments, the connector 20 and the connection end 102 can be fixedly connected by a fastener or other fixing member, which is not limited here.

[0070] Please refer to Figure 1 、 Figure 2 and Figure 10 In this embodiment, a sealing gasket 31 is provided between the adapter assembly 30 and the connector 20. The end surface of the connector 20 facing the joint 13 abuts against the sealing gasket 31. A certain interference fit exists between the connector 20 and the sealing gasket 31 to ensure sealing. It is understood that in other embodiments, the sealing gasket 31 may be omitted, and this is not a limitation here.

[0071] It is understandable that in other embodiments, the adapter assembly 30 may be omitted, and the catheter body 10 may be directly and detachably connected to the connector 20 to form a drainage cavity to achieve continuous extracorporeal drainage of fluids.

[0072] The above-mentioned drainage catheter 100 is used as follows: First, the drainage end 101 is placed at the lesion site; the connecting end 102 is passed through the skin via a subcutaneous tunnel and then connected to the adapter assembly 30 and the connector 20; the drainage catheter 100 continuously drains body fluids through the drainage cavity. Because the connector 20 and the adapter assembly 30 are both detachably connected to the connecting end 102, the shape and size of the connecting end 20 and the adapter assembly 30 can be ignored. The connecting end 102 is passed through the subcutaneous tunnel and then connected to the adapter assembly 30 and the connector 20, thereby fixing the position of the catheter body 10 through the subcutaneous tunnel, thereby reducing the chance of tube removal and the risk of infection, and effectively improving the technical problem that current multi-lumen drainage catheters cannot drain through subcutaneous tunnels.

[0073] Therefore, the drainage catheter 100 is connected to the connector 20, the adapter assembly 30, and the connecting end 102 through a detachable connection. In actual use, the connecting end 102 first passes through the skin through a subcutaneous tunnel and then connects to the adapter assembly 30 and the connector 20. The shape and size restrictions of the connector 20 and the adapter assembly 30 can be ignored, which improves the convenience of the catheter body 10 passing through the subcutaneous tunnel, minimizes harm to the human body, and thus reduces the chance of tube removal and the risk of infection.

[0074] Please refer to Figure 1 、 Figure 2 and Figure 4 In one embodiment of the present invention, the catheter body 10 includes a hose 12, a connector 13, and a connector 14. A drainage end 101 is located on the hose 12, a connecting end 102 is located on the connector 13, and the connector 14 connects the hose 12 and the connector 13. This ensures that the catheter body 10 maintains both the flexibility of the hose 12 and the stability of the connection between the connecting end 102 on the connector 13 and the connector 20.

[0075] In this embodiment, the hose 12 is made of silicone rubber, which is odorless, non-toxic, non-corrosive, anti-coagulant, has good compatibility with the body, has excellent high and low temperature resistance and physiological inertness, can withstand harsh disinfection conditions, and has high transparency, so the flow of liquid in the pipeline can be observed at any time.

[0076] In this embodiment, the material of the connector 13 can be hard plastic such as ABS (Acrylonitrile Butadiene Styrene) and PP (Polypropylene).

[0077] In this embodiment, connector 14 is a stainless steel tube, which has greater strength and hardness than hose 12 and can absorb some of the forces acting on the catheter body 10 during its movement. Stainless steel tubes are standard components, suitable for mass production, and low cost. It is understood that in other embodiments, connector 14 can be made of other materials, without limitation. It is also understood that there can be one or more connectors 14.

[0078] Please refer to Figures 4 to 6 In one embodiment of the present invention, a first connection hole 15 is defined on the side wall of the hose 12, and a second connection hole 16 is defined on the side wall of the connector 13. Both the first connection hole 15 and the second connection hole 16 are arranged parallel to the first passage 11, and the ends of the connector 14 are respectively inserted into the first connection hole 15 and the second connection hole 16. The ends of the connector 14 are respectively fixed in the first connection hole 15 and the second connection hole 16, which prevents the relative position of the hose 12 and the connector 13 from changing, thereby ensuring the stability of the first passage 11.

[0079] In this embodiment, the sidewall of the hose 12 is provided with two first connection holes 15, and the sidewall of the connector 13 is provided with two second connection holes 16 and a first through-hole 131 communicating with the connector 14. The portion of the second connection hole 16 near the connection end 102 is a complete circular hole, while the other end is a semi-circular hole. The connector 14 is glued into the second connection hole 16, with the tail end extending beyond the connector 13 by a distance of 8 to 12 mm, for example, 10 mm. The front end extends 0.8 to 1.2 mm beyond the step of the first through-hole 131 of the connector 13, i.e., the front end is positioned at the lower-middle position of the first through-hole 131. Glue is applied to the extended portion to ensure a secure seal. The portion of the connector 14 extending beyond the connector 13 is inserted into the first connection hole 15, forming an interference fit. The connection between the hose 12 and the connector 13 can be glued to ensure a tight seal. Furthermore, a tightening member 17, such as heat shrink tubing, can be used at the connection to enhance the seal.

[0080] Please refer to Figure 1 、 Figure 4 and Figure 5 In one embodiment of the present invention, a connecting passage 141 is provided within the connector 14. The first connecting hole 15, the connecting passage 141, and the second connecting hole 16 are sequentially connected to form a conducting lumen, which is independent of the drainage lumen. In this manner, the catheter body 10 can be provided with multiple independent lumens, ensuring that they do not interfere with each other during use.

[0081] Please refer to Figure 1 、 Figure 5 、 Figures 8 to 10In one embodiment of the present invention, a first through-hole 131 is provided on the sidewall of the connector 13, communicating with the guide cavity. The adapter assembly 30 includes an adapter 33 with a cavity 32 and a branch pipe 34 mounted on the adapter 33. Branch pipe 34 defines a third channel 35. The connector 13 passes through the cavity 32, and the third channel 35 communicates with the first through-hole 131. Thus, the third channel 35 communicates with the guide cavity, enabling the multi-lumen functionality of the drainage catheter 100.

[0082] In this embodiment, the catheter body 10 includes two connectors 14, forming two conducting lumens. The sidewall of the connector 13 is provided with two first through-holes 131, each of which communicates with a respective conducting lumen. The adapter 33 is provided with two symmetrically arranged branches 34, that is, the adapter 33 has two symmetrically arranged third channels 35, each of which communicates with a respective first through-hole 131. Thus, each third channel 35 communicates with a respective conducting lumen, forming a three-lumen drainage catheter 100 comprising two conducting lumens and one drainage lumen.

[0083] It can be understood that in other embodiments, the two branch pipes 34 may be asymmetrically arranged, and accordingly, the two first through holes 131 may also be asymmetrically arranged.

[0084] It is understandable that in other embodiments, the number of the first through holes 131 and the number of the branch pipes 34 may be other and may be determined according to the number of cavities actually required, and are not limited here.

[0085] Please refer to Figures 1 to 4 、 Figures 8 to 12 In one embodiment of the present invention, a blocking portion 36 is provided in the cavity 32 of the adapter 33 at one end facing the connector 20 , and the blocking portion 36 abuts against the side wall of the connector 13 .

[0086] Adapter assembly 30 further includes a stopper 37 disposed within cavity 32. Stopper 37 is used to position connector 13 so that the end of third passage 35 facing connector 13 communicates with first through-hole 131. Because blocking portion 36 and stopper 37 allow connector 13 to pass through adapter 33 at a predetermined position, accurate communication between the end of third passage 35 facing connector 13 and first through-hole 131 is ensured.

[0087] In this embodiment, the blocking portion 36 is an end face with a limiting hole 361 in the center. The joint 13 at the connecting end 102 is stepped. The diameter of the joint with the external thread is smaller than the diameter of the other joints, and a limiting end face 132 is formed at the connection point. The size of the limiting hole 361 is larger than the size of the joint with the external thread and smaller than the size of the limiting end face 132, so that the joint with the external thread can pass through the limiting hole 361 and the limiting end face 132 abuts against the blocking portion 36.

[0088] Please refer to Figures 7 to 12 In one embodiment of the present invention, a recessed portion 38 is provided on the inner wall of the adapter 33, a limiting member 37 is engaged with the recessed portion 38, and a through hole 371 is formed in the limiting member 37. A limiting surface 18 is provided on the outer wall of the connector 13, and the limiting surface 18 is adapted to the inner wall of the through hole 371, so that the connector 13 passes through the limiting member 37 at a preset angle, thereby preventing the connector 13 from rotating in the through hole 371.

[0089] In this embodiment, the recessed portion 38 is a racetrack-shaped groove, with two flat sides and two curved sides. Correspondingly, the outer wall of the retaining member 37 also has two flat sides and two curved sides. The flat sides of the outer wall of the retaining member 37 correspond to the flat sides of the recessed portion 38, and the curved sides of the outer wall of the retaining member 37 correspond to the curved sides of the recessed portion 38. This allows the retaining member 37 to be positioned within the cavity 32 in a predetermined orientation. Furthermore, the retaining member 37 and the recessed portion 38 form an interference fit, which improves sealing.

[0090] It is understandable that in other embodiments, the recessed portion 38 may also have other shapes, and accordingly, the shape of the limiting member 37 is adapted thereto, which is not limited here.

[0091] In this embodiment, the connector 13 is cylindrical, and the limiting surface 18 on its outer wall is a rectangular limiting surface, and the rest of the side wall is a circular surface. Correspondingly, the inner wall of the through hole 371, that is, the inner wall of the limiting member 37, is adapted to the outer wall of the connector 13, and is a combination of a rectangular plane and a circular surface. Among them, the rectangular plane side wall of the through hole 371 corresponds to the rectangular limiting surface of the connector 13, and the circumferential surface side wall of the through hole 371 corresponds to the circumferential surface of the connector 13. In this way, the connector 13 can be provided with the adapter 33 at a preset angle and direction to ensure the accuracy of assembly. It can be understood that in other embodiments, the shape of the limiting surface 18 on the outer wall of the connector 13 can be designed according to needs, and accordingly, the shape of the side wall of the through hole 371 is adapted thereto, and there is no limitation here.

[0092] In this embodiment, the recessed portion 38 and the limiting member 37 are connected by gluing. It is understood that in other embodiments, the recessed portion 38 and the limiting member 37 can also be integrally formed.

[0093] Please refer to Figures 1 to 4 , Figures 7 to 12In one embodiment of the present invention, the stopper 37 includes a sealing portion 372 and a fixing portion 373. The sealing portion 372 abuts against the blocking portion 36. The sidewall of the sealing portion 372 is provided with at least one second through-hole 374, which communicates with the first through-hole 131 and the third channel 35. The fixing portion 373 is provided at the end of the adapter 33 away from the blocking portion 36, so that the connector 13 is sequentially passed through the fixing portion 373 and the sealing portion 372 according to the preset position. The sealing portion 372 and the connector 13 have an interference fit. This ensures the positional accuracy of the connector 13, the connectivity between the first through-hole 131 and the third channel 35, and the sealing between the connector 13 and the adapter 33.

[0094] In this embodiment, the sealing portion 372 is a sealing ring. Two second through-holes 374 are defined on the sidewall of the sealing portion 372. These two second through-holes 374 are located on the curved outer wall of the sealing portion 372. These second through-holes 374 communicate with the first through-hole 131 and the third channel 35. In other words, both third channels 35 communicate with the conduction cavity. Furthermore, two grooves are defined on the curved outer wall of the sealing portion 372. Applying glue in these grooves allows the sealing portion 372 to be bonded to the adapter 33.

[0095] In this embodiment, the fixing portion 373 is a fixed ring. The outer wall of the fixing portion 373 is a combination of two flat surfaces and two curved surfaces, which allows the fixing portion 373 to be positioned within the cavity 32 in a predetermined direction. The inner wall of the fixing portion 373 is adapted to the limiting surface 18 and is a combination of a rectangular flat surface and a circular surface. This allows the connector 13 to pass through the fixing portion 373 at a predetermined angle and direction, ensuring assembly accuracy. It is understood that in other embodiments, the fixing portion 373 can be omitted, and the sealing portion 372 can directly limit the connector 13 to pass through the adapter 33 at a predetermined angle and direction.

[0096] In one embodiment of the present invention, drainage catheter 100 also includes a balloon at drainage end 101, which communicates with the conduction lumen. Branch tubes 34 are symmetrically arranged as injection and drainage branches. The injection branch is used for injection and cleaning, and the drainage branch is equipped with an indicator balloon for monitoring the status of the balloon. The combination of the injection and drainage branches enables the multi-lumen functionality of drainage catheter 100, expanding its possibilities and enhancing its practicality.

[0097] In this embodiment, a heparin cap is injected into the drug injection branch tube to perform drug injection and cleaning. It can be understood that in other embodiments, other required drugs can also be injected.

[0098] In this embodiment, the indicator balloon is connected to the drainage branch tube, which can monitor the status of the balloon on the drainage end 101 at the lesion in real time. It is understood that in other embodiments, the drainage branch tube can also be connected to a sensor-based drainage monitoring device to achieve intelligent monitoring of the drainage process, which is not limited here.

[0099] In this embodiment, the drainage catheter 100 further includes a drainage hole 40 and a drug injection hole 50 at the drainage end 101. The drainage hole 40 is connected to the first channel 11; the drug injection hole 50 is sequentially connected to one of the conduction lumens and the drug injection branch; and the balloon is sequentially connected to the other conduction lumen and the drainage branch. It is understood that in other embodiments, the drug injection branch can also be used to cleanse the lesion, which is not a limitation here.

[0100] Second, please refer to Figure 1 、 Figure 2 、 Figures 13 to 15 An embodiment of the present invention further provides a drainage device 200 , comprising a drainage catheter 100 , a drainage line 70 and a drainage bag 80 .

[0101] The connecting end 102 is detachably connected to the subcutaneous tunnel needle 60 . One end of the drainage tube 70 is connected to the connector 20 and communicates with the drainage cavity. The drainage bag 80 is connected to the other end of the drainage tube 70 .

[0102] The drainage device 200 can drain body fluids at the lesion with the drainage end 101. Since the subcutaneous tunnel needle 60, the adapter assembly 30 and the connector 20 can be detachably connected to the connecting end 102, the subcutaneous tunnel needle 60 can be connected to the connecting end 102 first. Then, the connecting end 102 can pierce the skin with the subcutaneous tunnel needle 60 and sneak through the skin again after a preset distance. That is, the connecting end 102 passes through the subcutaneous tunnel and then connects to the adapter assembly 30 and the connector 20, so that part of the catheter body 10 is fixed in position through the subcutaneous tunnel, thereby reducing the chance of tube disengagement and the risk of infection, and can perform continuous extracorporeal drainage, effectively improving the technical problem that the current multi-lumen drainage catheter cannot drain through the subcutaneous tunnel.

[0103] In this embodiment, one end of the subcutaneous tunnel needle 60 is provided with a bend for puncturing the skin, and the other end of the subcutaneous tunnel needle 60 is provided with an internal thread that is threadedly connected to the connecting end 102. It is understood that in other embodiments of the present application, the internal thread may be provided at the connecting end 102, and one end of the subcutaneous tunnel needle 60 may be provided with an external thread that matches the internal thread, and this is not limited here.

[0104] It is understood that in other embodiments, the subcutaneous tunnel needle 60 may also be a straight needle, which is not limited here.

[0105] It can be understood that in other embodiments of the present application, the subcutaneous tunnel needle 60 and the connecting end 102 can be fixedly connected by a fastener such as a buckle.

[0106] In this embodiment, the connector 20 and the drainage line 70 are connected via a Luer connector, that is, the Luer connector connects the drainage cavity and the drainage line 70. The Luer connector is easy to assemble and disassemble, has good sealing performance, and is highly practical.

[0107] In this embodiment, the drainage line 70 further includes a dropper bottle and a three-way valve. A monitor can be provided at the end of the three-way valve not connected to the drainage line 70 to monitor the situation inside the human body in real time.

[0108] On the third aspect, an embodiment of the present invention also proposes a drainage method, using a drainage device 200, the drainage method including: placing the drainage end 101 into the lesion; connecting the subcutaneous tunnel needle 60 to the connecting end 102, so that the subcutaneous tunnel needle 60 pierces the skin, sneaks through the skin after a preset distance, and part of the catheter body 10 passes through the skin with the subcutaneous tunnel needle 60; removing the subcutaneous tunnel needle 60, putting the adapter assembly 30 on the connecting end 102, and connecting the connector 20 to the connecting end 102; connecting the drainage pipeline 70 to the connecting head 20, and connecting the drainage bag 80 to one end of the drainage pipeline 70, so that the drainage bag 80 and the drainage pipeline 70 are connected to the drainage cavity.

[0109] Optionally, the preset distance of the subcutaneous tunnel needle 60 may be 3 to 8 cm, for example, 5 cm.

[0110] It can be understood that after part of the catheter body 10 first passes through the skin through the subcutaneous tunnel, the connecting end 102 is then detachably connected to the adapter assembly 30 and the connector 20. The shape and size restrictions of the connector 20 and the adapter assembly 30 can be ignored, which improves the convenience of the catheter body 10 passing through the subcutaneous tunnel, thereby reducing the chance of tube removal and reducing the risk of infection.

[0111] The above-mentioned drainage catheter 100, drainage device 200 and drainage method can be used for clinical treatment of neurosurgery. Since the subcutaneous tunnel needle 60 and the connector 20 can be detachably connected to the connecting end 102, the subcutaneous tunnel needle 60 can be connected to the connecting end 102 first, and then the connector 20 and the adapter assembly 30 can be connected to the connecting end 102 after the subcutaneous tunnel is established. The size limitations of the connector 20 and the adapter assembly 30 can be ignored, and the connecting end 102 can be kept away from the puncture point, thereby reducing the chance of tube disengagement and reducing the risk of infection.

[0112] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A drainage catheter for draining fluid through a subcutaneous tunnel, characterized in that: The drainage catheter comprises: a catheter body, the catheter body comprising a drainage end and a connecting end, wherein a first passage penetrating the drainage end and the connecting end is provided in the catheter body; a connector detachably connected to the connecting end, wherein a second channel is provided in the connector; and an adapter assembly, the adapter assembly being sleeved on the connecting end and abutting against the connector, and the adapter assembly being in communication with the conducting cavity of the catheter body; The first channel is connected to the second channel to form a drainage cavity, and the drainage cavity is used to drain body fluid out of the body.

2. The drainage catheter according to claim 1, characterized in that The catheter body includes a hose, a joint and a connecting piece. The drainage end is located on the hose, the connecting end is located on the joint, and the connecting piece connects the hose and the joint.

3. The drainage catheter according to claim 2, characterized in that A first connecting hole is provided on the side wall of the hose, and a second connecting hole is provided on the side wall of the connector. The first connecting hole and the second connecting hole are both arranged parallel to the first channel, and both ends of the connecting piece are respectively inserted into the first connecting hole and the second connecting hole.

4. The drainage catheter according to claim 3, characterized in that: A connecting channel is provided in the connecting piece, and the first connecting hole, the connecting channel and the second connecting hole are connected in sequence to form a conducting cavity, and the conducting cavity is independent of the drainage cavity.

5. The drainage catheter according to claim 4, characterized in that A first through hole communicating with the conducting cavity is provided on the side wall of the connector; The adapter assembly includes an adapter with a cavity and a branch pipe provided on the adapter, a third channel is provided in the branch pipe, the joint is passed through the cavity, and the third channel is connected to the first through hole; The connector is detachably connected to the connection end via threads or buckles.

6. The drainage catheter according to claim 5, characterized in that The adapter is provided with a blocking portion at one end facing the connector, and the blocking portion abuts against the side wall of the connector; The adapter assembly further includes a limiting member disposed in the cavity, and the limiting member is used to position the connector so that the third channel is connected to the first through hole at one end thereof facing the connector.

7. The drainage catheter according to claim 6, characterized in that A recessed portion is provided on the inner wall of the adapter, the limiting member is clamped with the recessed portion and a through hole is provided in the limiting member, and a limiting surface is provided on the outer wall of the connector, and the limiting surface is adapted to the inner wall of the through hole.

8. The drainage catheter according to claim 7, characterized in that The limiting member includes a sealing portion and a fixing portion, the sealing portion abuts against the blocking portion, and at least one second through hole is provided on the side wall of the sealing portion, and the second through hole is connected to the first through hole and the third channel; the fixing portion is provided at one end of the adapter away from the blocking portion, so that the joint is sequentially penetrated by the fixing portion and the sealing portion according to a preset position, and the sealing portion is interference fit with the joint.

9. The drainage catheter according to claim 5, characterized in that: The drainage catheter further comprises a balloon provided at the drainage end, the balloon being in communication with the conduction cavity; The branch pipes are symmetrically arranged drug injection branch pipes and diversion branch pipes. The drug injection branch pipes are used for drug injection and cleaning. The diversion branch pipes are provided with indicator airbags for monitoring the status of the balloons.

10. A drainage device, characterized in that: include: The drainage catheter according to any one of claims 1 to 9; a subcutaneous tunnel needle, detachably connected to the connecting end; and, A drainage line and a drainage bag, one end of the drainage line is connected to the connector and communicates with the drainage cavity, and the drainage bag is connected to the other end of the drainage line.

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