Split combined type multichannel drainage tube
By introducing a hard central tube into the drainage tube and a tight sleeve structure, the contradiction between the stability of the drainage tube connection and the smoothness of the capillary wall tube is solved, and the stable connection of the drainage tube and the smoothness of the capillary wall tube are achieved.
Patent Information
- Application Number
- CN202323372947.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-11
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2033-12-11
AI Technical Summary
During the pipe placement process, the connecting head assembly of the existing drainage tube is too large, which hinders the passage of human tissue. When the tube is equipped with a guide needle, the cannula and the component need to be connected later, resulting in a contradiction between the connection stability and the smoothness of the capillary wall tube.
Design a split-type multi-channel drainage tube, including a connecting seat, a drainage connection tube and a drainage tube, and uses a hard central tube to tightly press the sleeve structure to ensure a stable connection between the drainage tube and the connecting base. Keep the capillary wall tube unobstructed.
By increasing the contact surface between the sleeve and the drainage cannula, a greater friction is provided to ensure the firmness of the connection without affecting the smoothness of the capillary wall tube, and avoiding interference dimensional problems caused by excessive compression.
Smart Images
Figure CN222323973U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a drainage technology for medical devices, in particular to a split combined multi-channel drainage tube. Background Art
[0002] After a surgical operation, drainage is a timely and effective treatment measure in clinical treatment. Usually, the body fluid is drained to the external drainage bag or drainage bottle through a drainage tube. Usually, it is appropriate to insert the drainage tube into the body and keep it in the drainage state for a period of time, and it is not suitable for frequent plugging and replacement. During the placement of the drainage tube, the connector assembly is too large to prevent the drainage tube from passing through the human tissue (the external part of the drainage tube assembly needs to be disassembled during the placement of the tube). In addition, when the drainage tube is equipped with a guide needle, the drainage cannula and the drainage assembly need to be connected later. Therefore, the drainage tube is provided with a connecting seat to connect the drainage cannula and the drainage connecting tube. The drainage cannula is sleeved on the central tube inside the connecting seat, and then the drainage cannula is pressed against the central tube by tightening the connecting cover so as to be installed at the lower end of the connecting seat. Due to the limited thickness of the connecting cover, the contact area between it and the drainage cannula is small. In order to ensure a stable connection, the drainage cannula needs to be squeezed, and the two interfere with each other in the thickness direction by a certain size. The wall of the drainage cannula is usually provided with a capillary wall tube. In order to compact and block the patency of the capillary wall tube, the drainage cannula is usually not allowed to be excessively squeezed, which is in great conflict with the connection stability between the drainage cannula and the connecting seat. Summary of the invention
[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a split combined multi-channel drainage tube which can both keep the capillary wall tubes in the drainage cannula unobstructed and firmly connect the drainage cannula and the connecting seat.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a split combined multi-channel drainage tube, which includes a connecting seat, a drainage connecting tube and a drainage cannula, the interior of the connecting seat is provided with a hard central tube fixedly connected to the middle of the connecting seat, the central tube divides the inner cavity of the connecting seat into an inner channel and an inserting cavity, the upper end of the drainage cannula is radially expanded to be inserted into the central tube and inserted into the inserting cavity so that the inner cavity of the drainage cannula is connected with the inner channel; the drainage cannula A drainage hole is provided away from the connecting seat, and a capillary wall tube is provided inside the side wall of the drainage cannula, which is connected from the upper end to the lower end of the drainage cannula; the capillary wall tube is open at the upper end of the drainage cannula and is connected with the insertion cavity; the outer peripheral surface of the upper end of the drainage cannula is provided with a hard sleeve that surrounds and presses the outer wall of the drainage cannula, and the lower end of the connecting seat is detachably connected with a lower connecting cover that can push the sleeve to move axially, and the lower end of the connecting seat is provided with a sealing ring whose inner ring edge is tightly sleeved on the outer wall of the sleeve.
[0005] As an improvement on the technical solution of the split combined multi-channel drainage tube of the utility model, the contact length between the sleeve and the drainage cannula is greater than 1.5 times the diameter of the drainage cannula.
[0006] As an improvement on the technical solution of the split combined multi-channel drainage tube of the utility model, the end of the central tube extends out of the lower end of the connecting seat, and the sleeve part extends into the insertion cavity.
[0007] As an improvement of the technical solution of the split combined multi-channel drainage tube of the utility model, the inner side of the sealing ring is provided with a conical ring wall which is inclined upward and contacts the outer wall surface of the sleeve. 所述下连接盖与所述连接座之间 Gas-tight connection is achieved by sealing ring.
[0008] As an improvement of the technical solution of the split combined multi-channel drainage tube of the utility model, the lower connecting cover is provided with a through hole larger than the diameter of the sleeve, and the middle part of the sleeve is provided with a shoulder larger than the diameter of the through hole.
[0009] As an improvement on the technical solution of the split combined multi-channel drainage tube of the utility model, the circumferential surface of the perforation is an inclined guide surface, the lower end of the sleeve is provided with an inverted convex edge larger than the diameter of the small head of the perforation, the lower edge of the inverted convex edge is provided with a chamfered cone surface, and the diameter of the small head of the chamfered cone surface is smaller than the diameter of the large head of the inclined guide surface.
[0010] As an improvement on the technical solution of the split combined multi-channel drainage tube of the utility model, the lower end of the drainage connecting tube is connected to the upper end of the connecting seat to connect the inner channel, and the upper end of the drainage connecting tube is connected to the external negative pressure mechanism.
[0011] As an improvement of the technical solution of the split combined multi-channel drainage tube of the utility model, the side wall of the connecting seat is provided with an infusion channel connected to the inner channel and a drug infusion channel connected to the insertion cavity.
[0012] As an improvement on the technical solution of the split combined multi-channel drainage tube of the utility model, the central tube includes an introduction section and a main body section, the outer diameter of the introduction section is smaller than the main body section and smoothly transitions to the main body section; the inner hole of the sleeve includes an upper introduction section and a lower tightening section, the aperture of the introduction section is larger than the tightening section and smoothly transitions.
[0013] As an improvement on the technical solution of the split combined multi-channel drainage tube of the utility model, the insertion cavity is annular, the drainage cannula is a soft catheter, and at least two capillary wall tubes are opened, and the at least two capillary wall tubes are evenly arranged along the circumferential direction of the drainage cannula.
[0014] The beneficial effect of the utility model is that the lower connection cover is equipped with a hard sleeve, the upper end of the soft drainage cannula is inserted into and tightly embraces the hard central tube, and then the lower connection cover pushes the sleeve to cover and tightly embrace the drainage cannula, and the sleeve has a certain axial length so that it has more contact surfaces with the drainage cannula and thus has a larger friction force, so that the sleeve and the drainage cannula can form a relatively firm connection relationship without over-compressing the drainage cannula. Since there is no local over-compression of the drainage cannula to avoid excessive interference size, the patency of the capillary wall tube opened in the tube wall of the drainage cannula is maintained, so that the split combined multi-channel drainage tube can not only keep the capillary wall tube in the drainage cannula patency but also firmly connect the drainage cannula and the connection seat. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional structural schematic diagram of a split combined multi-channel drainage tube of the utility model.
[0016] Figure 2 for Figure 1 The three-dimensional structural schematic diagram of the split combined multi-channel drainage tube is shown in which the central tube and the drainage cannula are separated and the connecting seat and the lower connecting cover are cut, and the lower connecting cover is separated from the connecting seat.
[0017] Figure 3 for Figure 2 The three-dimensional structural schematic diagram of the central tube and the drainage cannula in the split combined multi-channel drainage tube is shown.
[0018] Figure 4 for Figure 3 The three-dimensional structural schematic diagram of the split combined multi-channel drainage tube shown is that the lower connecting cover is further inserted into the connecting seat. DETAILED DESCRIPTION
[0019] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings.
[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the utility model is a split combined multi-channel drainage tube, which includes a connecting seat 21, a drainage connecting tube 51 and a drainage cannula 11. The interior of the connecting seat 21 is provided with a hard central tube 25 fixedly connected to the middle of the connecting seat, and the central tube 25 divides the inner cavity of the connecting seat into an inner channel 52 and an insertion cavity 28. The outer wall of the central tube 25 and the inner wall of the connecting seat 21 form the insertion cavity 28. The upper end of the drainage cannula 11 is radially expanded and inserted into the central tube 25 and inserted into the insertion cavity 28 so that the inner cavity of the drainage cannula 11 is connected with the inner channel 52, so that the upper end of the drainage cannula 11 can be detachably connected to the lower end of the connecting seat 21; the drainage cannula 11 is provided with a drainage hole 12 away from the connecting seat 21, and a capillary wall tube 13 is provided inside the side wall of the drainage cannula 11, which is connected from the upper end to the lower end of the drainage cannula 11; the capillary wall tube 13 is open at the upper end of the drainage cannula 11 and is connected with the insertion cavity 28; the outer peripheral surface of the upper end of the drainage cannula 11 is provided with a hard sleeve 35 that surrounds and presses the outer wall surface of the drainage cannula 11, the lower end of the connecting seat 21 is detachably connected with a lower connecting cover 31 that can push the sleeve 35 to move axially, and the lower end of the connecting seat 21 is provided with a sealing ring 22 whose inner ring edge is tightly sleeved on the outer wall surface of the sleeve 35. The lower connection cover 31 is provided with a hard sleeve 35, and the upper end of the soft drainage cannula 11 is inserted into and tightly embraces the hard central tube 25, and then the lower connection cover 31 pushes the sleeve 35 to cover and tightly embrace the drainage cannula 11. The sleeve 35 has a certain axial length so that it has more contact surfaces with the drainage cannula 11 and thus has a greater friction force, so that the sleeve 35 and the drainage cannula 11 can form a relatively firm connection relationship without over-pressing the drainage cannula 11. Since there is no local over-pressing of the drainage cannula 11 to avoid excessive interference size, the patency of the capillary wall tube 13 opened in the tube wall of the drainage cannula 11 is maintained, so that the split combined multi-channel drainage tube can not only keep the capillary wall tube 13 in the drainage cannula 11 unobstructed but also firmly connect the drainage cannula 11 and the connection seat 21.
[0021] Among them, the contact length of the sleeve 35 with the drainage cannula 11 is greater than 1.5 times the diameter of the drainage cannula 11, thereby ensuring that sufficient friction can be generated to hold the drainage cannula 11 tightly to prevent it from loosening. The sleeve 35 and the central tube 25 clamp the drainage cannula 11 from the inside and outside to make it less likely to loosen, and no local excessive squeezing of the drainage cannula 11 is generated, thereby maintaining the patency of the drainage cannula 11.
[0022] Furthermore, the end of the central tube 25 extends out of the lower end of the connecting seat 21, thereby facilitating the insertion and connection operation between the upper end of the drainage cannula 11 and the end of the central tube 25; the sleeve 35 partially extends into the insertion cavity 28, so that the opening of the capillary wall tube 13 is located in the insertion cavity 28.
[0023] The inner side of the sealing ring 22 is provided with a cone ring wall 23 that is inclined upward and contacts the outer wall of the sleeve 35. The cone ring wall 23 is a conical annular wall that is inclined inward and upward, and has a certain degree of softness and elasticity, so that the sleeve 35 with an inner diameter larger than the cone ring wall 23 can be inserted and form a seal. When there is a positive pressure inside, the cone ring wall 23 and the sleeve 35 will be in tighter contact and better sealing. The body of the sealing ring 22 is located between the lower connection cover 31 and the connection seat 21 to achieve an airtight connection.
[0024] The lower connection cover 31 is provided with a through hole 32 larger than the diameter of the sleeve, and the middle part of the sleeve 35 is provided with a shoulder 38 larger than the diameter of the through hole, so that the lower connection cover 31 can push the sleeve 35 inward to move axially and hold the drainage cannula 11 tightly to make it sleeved on the central tube 25, so that the inner cavity channel of the drainage cannula 11 is connected with the central channel of the central tube 25. This structure makes the lower connection cover 31 and the sleeve 35 two separate monomers, so that the sleeve 35 mainly moves axially in the process of pushing the drainage cannula 11 into the central tube 25, and there is a circumferential tangential sliding friction between the shoulder 38 of the sleeve 35 and the lower connection cover 31. The driving process does not force the sleeve 35 to rotate, so that it plays a certain protective role in preventing the drainage cannula 11 from twisting.
[0025] Furthermore, the peripheral surface of the perforation 32 is an inclined guide surface, and the lower end of the sleeve 35 is provided with an undercut convex edge 36 larger than the diameter of the small end of the perforation, and the lower side edge of the undercut convex edge 36 is provided with a chamfered cone surface, and the small end diameter of the chamfered cone surface is smaller than the large end diameter of the inclined guide surface, so that the chamfered cone surface cooperates with the inclined guide surface to facilitate the undercut convex edge of the sleeve 35 to be inserted into the perforation 32 along the axial direction, and after insertion, the undercut convex edge 36 can prevent the sleeve 35 from falling off the lower connection cover 31. Therefore, when releasing the connection, the sleeve 35 can be pulled back in the direction away from the central tube 25 in the axial direction, and the drainage cannula 11 can be pulled out of the central tube 25 after loosening.
[0026] The lower end of the drainage connection tube 51 is connected to the upper end of the connection seat 21 to communicate with the inner channel 52, and the upper end of the drainage connection tube 51 is connected to the external negative pressure mechanism, thereby generating negative pressure on the inner channel 52 and the central channel of the central tube 25, forming negative pressure on the drainage cannula 11, and performing negative pressure drainage on the cannula site.
[0027] The side wall of the connection seat 21 is provided with an infusion channel 55 connected to the inner channel 52 and a drug delivery channel 29 connected to the insertion cavity 28, so that disinfectant liquid can be injected for flushing during the drainage process. The flushing channel and the drainage channel share the same channel and realize different functions at different times. When working together with the infusion channel 55, it plays a flushing role, and at other times, it plays a drainage role. Drug liquid can be added to the drug delivery channel 29 to play a therapeutic role.
[0028] The central tube 25 includes an introduction section and a main body section, the outer diameter of the introduction section is smaller than the main body section and smoothly transitions to the main body section; the inner hole of the sleeve 35 includes an upper introduction section and a lower tightening section, the aperture of the introduction section is larger than the tightening section and smoothly transitions. The introduction section facilitates the upper end of the drainage cannula 11 to be axially inserted into the central tube 25, and the sleeve 35 corresponds to the initial stage of inserting the central tube 25, there is more gap between the introduction section and the introduction section, and the drainage cannula 11 can be clamped at the gap to guide the sleeve 35 to be inserted more easily, and then the introduction section is correspondingly moved to the main body section, and the introduction section is correspondingly inserted into the tightening section to achieve a certain length of full-circumferential clamping, so as to obtain a tight connection effect and not easy to loosen.
[0029] Another structural form can be that the central tube 25 includes a continuous insertion section, a transition section and a connecting section, the connecting section is fixed to the connecting seat 21, the insertion section is suspended, the diameter of the insertion section is smaller than the diameter of the connecting section, and the transition section is inclined to facilitate the small end to be easily inserted into the upper end of the drainage cannula 11, and then the drainage cannula 11 is radially expanded during the axial insertion process, so that the drainage cannula 11 can more tightly cover the central tube 25, and the sleeve 35 can also be more smoothly inserted from the corresponding part of the small central tube 25 end. As the insertion depth increases, the insertion becomes tighter, and the anti-loosening effect is very good.
[0030] The insertion cavity 28 is annular, and the drainage cannula 11 is a soft catheter. The soft drainage cannula 11 and the hard central tube 25 are matched with each other, which is easy to connect and install, and also easy to achieve the sealing effect; and the outer side of the soft drainage cannula 11 is matched with the hard sleeve, which also achieves the sealing effect of soft and hard matching and the effect of docking and installation. The capillary wall tube 13 is provided with at least two, and the at least two capillary wall tubes 13 are evenly arranged along the circumferential direction of the drainage cannula 11, and four capillary wall tubes 13 are usually provided to better maintain the patency of the capillary wall tube 13.
[0031] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.
Claims
1. A split combined multi-channel drainage tube, comprising a connecting seat, a drainage connecting tube and a drainage cannula, wherein a hard central tube fixedly connected to the middle of the connecting seat is provided inside the connecting seat, the central tube divides the inner cavity of the connecting seat into an inner channel and an inserting cavity, the upper end of the drainage cannula is radially expanded to be inserted into the central tube and inserted into the inserting cavity so that the inner cavity of the drainage cannula is connected with the inner channel; the drainage cannula is provided with a drainage hole away from the connecting seat, and a capillary wall tube is provided inside the side wall of the drainage cannula, which is connected from the upper end of the drainage cannula to the lower end; characterized in that: The capillary wall tube is open at the upper end of the drainage cannula and communicates with the insertion cavity; the outer peripheral surface of the upper end of the drainage cannula is provided with a hard sleeve that surrounds and presses the outer wall of the drainage cannula, the lower end of the connecting seat is detachably connected with a lower connecting cover that can push the sleeve to move axially, and the lower end of the connecting seat is provided with a sealing ring with an inner ring edge that tightly sleeves the outer wall of the sleeve.
2. The split combined multi-channel drainage tube according to claim 1, characterized in that: The contact length between the sleeve and the drainage cannula is greater than 1.5 times the diameter of the drainage cannula.
3. The split combined multi-channel drainage tube according to claim 2, characterized in that: The end of the central tube extends out of the lower end of the connecting seat, and the sleeve portion extends into the insertion cavity.
4. The split combined multi-channel drainage tube according to claim 1, characterized in that: The inner side of the sealing ring is provided with a conical ring wall which is inclined upward and contacts the outer wall surface of the sleeve.
5. The split combined multi-channel drainage tube according to claim 1, characterized in that: The lower connecting cover is provided with a through hole larger than the diameter of the sleeve, and the middle part of the sleeve is provided with a shoulder larger than the diameter of the through hole.
6. The split combined multi-channel drainage tube according to claim 5, characterized in that: The circumferential surface of the perforation is an inclined guide surface, and the lower end of the sleeve is provided with an undercut convex edge larger than the diameter of the small head of the perforation, and the lower side edge of the undercut convex edge is provided with a chamfered cone surface, and the small head diameter of the chamfered cone surface is smaller than the large head diameter of the inclined guide surface.
7. The split combined multi-channel drainage tube according to claim 1, characterized in that: The lower end of the drainage connecting tube is connected to the upper end of the connecting seat to communicate with the inner channel, and the upper end of the drainage connecting tube is connected to the external negative pressure mechanism.
8. The split combined multi-channel drainage tube according to claim 1, characterized in that: The side wall of the connecting seat is provided with an infusion channel connected to the inner channel and a drug infusion channel connected to the insertion cavity.
9. The split combined multi-channel drainage tube according to claim 1, characterized in that: The central tube comprises an introduction section and a main body section, wherein the outer diameter of the introduction section is smaller than that of the main body section and smoothly transitions to the main body section; the inner hole of the sleeve comprises an upper introduction section and a lower tightening section, wherein the aperture of the introduction section is larger than that of the tightening section and smoothly transitions to the main body section.
10. The split combined multi-channel drainage tube according to claim 1, characterized in that: The inserting cavity is annular, the drainage cannula is a soft catheter, and at least two capillary wall tubes are provided, and the at least two capillary wall tubes are evenly arranged along the circumferential direction of the drainage cannula.