Handle assembly and medical catheter system

Abstract

The utility model provides a handle assembly and medical catheter system relate to medical instrument technical field. The handle assembly includes the connecting module that has the catheter passage inside, at least one end of catheter passage is equipped with the opening, at least partial inner wall of catheter passage is equipped with the sealing portion, and the sealing portion is used for being consistent and sealing with the object that extends to the inside of catheter passage. The handle assembly can be inserted for medical catheter and other objects through the catheter passage and opening of connecting module, realizes the detachable connection between handle assembly and medical catheter, and can guarantee the sealing property of medical catheter and other objects and handle assembly connecting place through the sealing portion, thereby being convenient for separating medical catheter and handle assembly through the operation of first after operation, withdrawing the guide channel directly while retaining medical catheter, need not performing the complicated instrument exchange operation, effectively improves the operation convenience, operation safety and operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a handle assembly and a medical catheter system. Background Technology

[0002] In clinical practice, doctors frequently use medical catheters for surgical treatments. Medical catheters include infusion tubing, drug delivery tubing, drainage tubing, irrigation tubing, contrast catheters, and endoscopic catheters. Medical catheters are typically long and thin tubes, with a distal and proximal end based on their proximity to the patient. The proximal end of the catheter usually has a handle that communicates with the internal lumen of the catheter. Through the handle and its connectors, external instruments can be connected to the catheter, allowing procedures such as fluid injection, suction, or guidewire insertion to be performed through the catheter's internal lumen.

[0003] Before inserting the distal end of a medical catheter into the patient's body, a thin guiding channel (such as an interventional catheter or endoscope) is often first inserted. The medical catheter is then inserted into the patient's body along this guiding channel. After surgical treatment using a medical catheter, it is often necessary to leave the catheter in place for continuous and long-term treatment, while simultaneously removing the guiding channel from the patient's body. However, the proximal end of the medical catheter is fixed to the handle and cannot be separated or disassembled. Furthermore, the handle is typically much larger than the diameter of the guiding channel, making it impossible to directly remove the guiding channel from the patient's body while the medical catheter is in place.

[0004] Current procedures for withdrawing the guiding channel typically involve inserting a guidewire into the patient's body through the guiding channel after surgery, then withdrawing the medical catheter and guiding channel together while retaining the guidewire, and finally reinserting the medical catheter along the guidewire. This process of placing the guidewire, withdrawing the medical catheter and guiding channel, and reinserting the medical catheter not only increases surgical costs and time but is also complex, requiring a high level of skill and coordination from both the surgeon and assistants. This increases surgical risks, and any errors can lead to surgical failure and harm to the patient. Utility Model Content

[0005] The purpose of this invention is to provide a handle assembly and a medical catheter system to alleviate the technical problems in the prior art where, after surgery, when the medical catheter needs to be left in the patient's body and the guide channel needs to be removed, a guidewire must first be inserted into the patient's body, then the medical catheter and guide channel must be removed, and then the medical catheter must be reinserted. This not only increases the cost and time of the operation, but also makes the operation complicated, requires high levels of skill and coordination from the doctor and assistant, and increases the risk of the operation.

[0006] In a first aspect, this utility model provides a handle assembly, including a connecting module with an internal conduit channel;

[0007] The conduit channel has an opening at at least one end, and a sealing portion is provided on at least a portion of the inner wall of the conduit channel for fitting and sealing with an object inserted into the conduit channel.

[0008] In an optional implementation, a connector is also included;

[0009] A through hole is provided between the side wall of the connecting module and the catheter channel. The end of the through hole located on the side wall of the connecting module communicates with the connector. The end of the through hole located inside the connecting module is used to communicate with the working hole on the medical catheter inside the catheter channel.

[0010] In an optional embodiment, there are multiple connecting modules, which are distributed sequentially along the extension direction of the medical catheter, and the catheter channels between any two adjacent connecting modules are interconnected.

[0011] The catheter channels in the multiple connecting modules are used to accommodate the same medical catheter, and the through holes on the multiple connecting modules are used to communicate one-to-one with the multiple working holes spaced apart on the medical catheter.

[0012] In an optional embodiment, the sealing part is an annular part and is provided in two sets. The inner wall of the sealing part is used to seal and fit against the outer wall of the medical catheter that extends into the catheter channel. The two sets of sealing parts form a closed cavity in the catheter channel. The closed cavity is used to communicate with the working hole on the medical catheter when the medical catheter is extended into the catheter channel, so as to form a working passage with the medical catheter.

[0013] In an optional embodiment, the connecting module includes a first end cap and a hollow sealing body, the first end cap being connected to one end of the sealing body, and the opening being provided on the first end cap;

[0014] The sealing part is a sealing ring that can deform radially, the inner diameter of the sealing ring is not greater than the inner diameter of the conduit channel, and the sealing ring abuts between the first end cap and the sealing body.

[0015] The first end cap is movable relative to the sealing body along its axial direction to deform the sealing ring between the first end cap and the sealing body, and the first end cap is able to remain in a fixed position after being moved relative to the sealing body.

[0016] In an optional embodiment, the connection module further includes a second end cap, which is connected to the end of the sealing body that is away from the first end cap;

[0017] The sealing ring abuts between the second end cap and the sealing body. The second end cap is movable relative to the sealing body along its axial direction to deform the sealing ring between the second end cap and the sealing body, and the second end cap is able to remain fixed in position after moving relative to the sealing body.

[0018] In an optional embodiment, the first end cap and the sealing body are slidably connected along the axial direction of the first end cap, or the first end cap and the sealing body are threadedly connected.

[0019] In an optional embodiment, a support frame is also included, which is disposed on one side of the connecting module;

[0020] The connector and the through hole are connected by a connecting pipe, and the support frame is provided with a slot, in which the connecting pipe is snapped into the slot; and / or, both ends of the catheter channel are provided with openings, which are used for the proximal end of the medical catheter to pass through sequentially; the support frame is provided with a support groove or a support hole, the support groove is used to accommodate the proximal end of the medical catheter outside the catheter channel, and the support hole is used for the proximal end of the medical catheter outside the catheter channel to pass through.

[0021] In an optional embodiment, a handle housing is also included, wherein a receiving groove is provided inside the handle housing, and the connecting module is disposed in the receiving groove.

[0022] Secondly, this utility model provides a medical catheter system, including a medical catheter and a handle assembly as described in any of the foregoing embodiments. The medical catheter includes a proximal end and a distal end, and the proximal end of the medical catheter extends into the catheter channel after passing through the opening of the catheter channel.

[0023] In an optional embodiment, the medical catheter has an internal cavity, and the tube body of the medical catheter located within the catheter channel has a working hole that communicates with the cavity;

[0024] The connecting module is a single unit, and the through hole between the side wall of the connecting module and the conduit channel is connected to the working hole.

[0025] In an optional embodiment, the medical catheter has multiple mutually isolated cavities inside, and the tube body of the medical catheter located within the catheter channel has multiple working holes spaced apart along its axial direction, with each of the multiple working holes corresponding to and communicating with one of the multiple cavities.

[0026] The connection modules are multiple, and the proximal end of the medical catheter passes through the catheter channels in the multiple connection modules in sequence and is located in the medical channel in the connection module far away from the distal end of the medical catheter. The multiple working holes are connected one-to-one with the through holes on the multiple connection modules located between their side walls and the catheter channels.

[0027] In an optional embodiment, the medical catheter has multiple mutually isolated cavities inside, and the tube body of the medical catheter located within the catheter channel has multiple working holes spaced apart along its axial direction, with each of the multiple working holes corresponding to and communicating with one of the multiple cavities.

[0028] The connecting module is a single unit. Both ends of the catheter channel are provided with openings. The proximal end of the medical catheter can pass through the openings at both ends of the catheter channel in sequence and extend out of the connecting module. The connecting module is slidably connected to the medical catheter. During the sliding process relative to the medical catheter, the connecting module can make its through hole between its sidewall and the catheter channel communicate with any of the working holes.

[0029] In an optional embodiment, the medical catheter has a balloon attached to the outside of its distal end, and at least one lumen in the medical catheter is a balloon cavity. The medical catheter has a balloon hole on its body located at the balloon, and the balloon and the balloon cavity are connected through the balloon hole.

[0030] In an optional embodiment, there are two medical catheters, one of which is an inner catheter and the other is an outer catheter; the outer catheter is sleeved over the inner catheter, and the proximal end of the inner catheter passes through the proximal end of the outer catheter and protrudes outside the outer catheter;

[0031] The handle assembly comprises two parts, one of which is a proximal handle and the other is a distal handle. The proximal end of the external catheter extends into the catheter channel in the distal handle. The distal end of the catheter channel in the distal handle, away from the external catheter, has an opening, which is a proximal opening. The proximal end of the internal catheter passes through the catheter channel in the distal handle and extends into the catheter channel in the proximal handle through the proximal opening. The proximal opening is sealed to the outer wall of the internal catheter.

[0032] The handle assembly provided by this utility model includes a connecting module with an internal catheter channel. At least one end of the catheter channel has an opening, and at least a portion of the inner wall of the catheter channel has a sealing portion for contacting and sealing with an object inserted into the catheter channel. The handle assembly provided by this utility model can be used in combination with medical catheters such as infusion tubes, drug delivery tubes, drainage tubes, and flushing tubes to perform operations such as fluid injection, gas injection, and suction. The connecting module can be detachably connected to the medical catheter. Specifically, the opening is for the medical catheter to pass through, and the catheter channel is for accommodating the medical catheter. The medical catheter and the connecting module are connected by a plug-in connection. Correspondingly, the object inserted into the catheter channel is the medical catheter. The two ends of the medical catheter are typically a proximal end and a distal end. The distal end is inserted into the patient's body, and the proximal end is connected to the handle to facilitate insertion, fluid injection, gas injection, or suction operations. During surgery, a slender guiding channel, such as an interventional catheter or endoscope, can be inserted into the patient's body first. The proximal end of the medical catheter is connected to the connecting module in the handle assembly provided by this invention, thus connecting the medical catheter and the handle assembly. Then, the distal end and the proximal portion of the medical catheter are placed into the patient's body through the guiding channel. Surgical treatment can then be performed using the medical catheter and the handle assembly. Because the outer wall of the medical catheter, after being inserted into the catheter channel of the connecting module, can seal against the sealing part of the inner wall of the catheter channel in the handle assembly provided by this invention, the connection point between the medical catheter and the connecting module can be sealed. That is, the sealing of the connection point is effectively guaranteed after the medical catheter and the handle assembly are assembled. At this time, normal medical operations such as fluid injection, gas injection, and suction can be performed using the medical catheter and the handle assembly. After surgical treatment, when it is necessary to leave the medical catheter in the patient's body and remove the guiding channel, the proximal end of the medical catheter can be removed from the catheter channel of the connecting module, thereby separating the medical catheter from the handle assembly. Since the proximal end of the medical catheter lacks a handle assembly, the guide channel can be withdrawn while the medical catheter is in place. After withdrawing the guide channel, to ensure the medical catheter can be used normally, the proximal end of the medical catheter can be inserted into the catheter channel within the connecting module to reassemble the medical catheter and handle assembly.As can be seen, the connecting module in this utility model allows the handle assembly to be used as an independent handle. It not only ensures the sealing of the connection point after assembling the medical catheter and handle assembly, thus guaranteeing the normal function of both, but also facilitates flexible assembly and disassembly of the handle assembly at the proximal end of the medical catheter according to usage needs. During the withdrawal of the guide channel from the patient's body, the guide channel can be withdrawn directly after separating the medical catheter and handle assembly, without first inserting a guidewire into the patient's body, or withdrawing the medical catheter and guide channel together and then re-inserting the medical catheter along the guidewire. This effectively simplifies the withdrawal operation of the guide channel, optimizes the surgical procedure, and not only effectively improves surgical efficiency, reduces surgical costs and time, but also effectively reduces surgical risks, thereby reducing harm to the patient and bringing significant benefits to both medical staff and patients.

[0033] Compared with the prior art, the handle assembly provided by this utility model allows for the insertion of objects through the catheter channel and opening of the connecting module, realizing a detachable connection between the handle assembly and the medical catheter. Furthermore, the sealing part ensures a tight seal at the connection between the medical catheter and the handle assembly. This facilitates the removal of the guide channel after surgery when the medical catheter is left in the patient's body. The guide channel can be directly removed by first separating the medical catheter from the handle assembly, and then reconnecting the medical catheter to the connecting module after removal ensures normal use of the medical catheter. No complex instrument exchange procedures are required, effectively improving operational convenience, surgical safety, and surgical efficiency.

[0034] The medical catheter system provided by this utility model includes a medical catheter and the aforementioned handle assembly. The medical catheter includes a proximal end and a distal end, with the proximal end extending into the catheter channel after passing through the opening. Because this medical catheter system includes the aforementioned handle assembly, it achieves the same beneficial effects as the aforementioned handle assembly. Attached Figure Description

[0035] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the connection module in the handle assembly provided in Embodiment 1 of this utility model;

[0037] Figure 2A schematic diagram of the connection module, connecting pipe and connector in the handle assembly provided in Embodiment 1 of this utility model;

[0038] Figure 3 A cross-sectional view of the connection module and the partial connecting pipe provided in Embodiment 1 of this utility model;

[0039] Figure 4 Another cross-sectional view of the connecting module and the partial connecting pipe provided in Embodiment 1 of this utility model;

[0040] Figure 5 A cross-sectional view of a portion of the connection module when the sealing ring is not deformed, as provided in Embodiment 1 of this utility model;

[0041] Figure 6 A cross-sectional view of a partial connection module when the sealing ring deforms, as provided in Embodiment 1 of this utility model;

[0042] Figure 7 This is another cross-sectional view of a partial connection module provided in Embodiment 1 of this utility model when the sealing ring is not deformed;

[0043] Figure 8 This is a front view of the handle housing provided in Embodiment 1 of this utility model;

[0044] Figure 9 A cross-sectional view of the handle housing, connecting module, and connector provided in Embodiment 1 of this utility model;

[0045] Figure 10 This is a schematic diagram of the structure of the single-joint handle assembly provided in Embodiment 1 of this utility model;

[0046] Figure 11 This is a schematic diagram of the structure of the dual-joint handle assembly provided in Embodiment 1 of this utility model;

[0047] Figure 12 for Figure 11 A cross-sectional view of the handle assembly in the image;

[0048] Figure 13 This is another structural schematic diagram of the dual-joint handle assembly provided in Embodiment 1 of this utility model;

[0049] Figure 14 This is a schematic diagram of the structure of the three-joint handle assembly provided in Embodiment 1 of this utility model;

[0050] Figure 15 for Figure 14 A cross-sectional view of the handle assembly in the image;

[0051] Figure 16 This is a schematic diagram of the support frame provided in Embodiment 1 of the present utility model;

[0052] Figure 17 A cross-sectional view of the support frame provided in Embodiment 1 of this utility model;

[0053] Figure 18 Another sectional view of the support frame provided in Embodiment 1 of this utility model;

[0054] Figure 19 This is another structural schematic diagram of the support frame provided in Embodiment 1 of this utility model;

[0055] Figure 20 Another structural schematic diagram of the support frame provided in Embodiment 1 of this utility model;

[0056] Figure 21 A schematic diagram of the structure of a single-joint handle assembly including a locking structure provided in Embodiment 1 of this utility model;

[0057] Figure 22 This is a schematic diagram of the structure of a double-joint handle assembly including a locking structure provided in Embodiment 1 of the present invention;

[0058] Figure 23 A cross-sectional view of the connecting module when one end of the conduit channel provided in Embodiment 1 of this utility model is open and the other end is closed;

[0059] Figure 24 This is a schematic diagram of the connection module and connector when both ends of the conduit channel are open, as provided in Embodiment 1 of this utility model;

[0060] Figure 25 This is a schematic diagram of the structure of a medical catheter system including a single-connector handle assembly provided in Embodiment 2 of the present invention;

[0061] Figure 26 This is a schematic diagram of the structure of a medical catheter system including a dual-connector handle assembly provided in Embodiment 2 of the present invention;

[0062] Figure 27 This is a schematic diagram of the structure of a medical catheter system including a three-joint handle assembly provided in Embodiment 2 of the present invention;

[0063] Figure 28 This is another structural schematic diagram of a medical catheter system including a single-connector handle assembly provided in Embodiment 2 of this utility model;

[0064] Figure 29 This is a partial structural schematic diagram of the internal catheter provided in Embodiment 2 of this utility model;

[0065] Figure 30 This is a partial structural schematic diagram of the external catheter provided in Embodiment 2 of this utility model;

[0066] Figure 31A schematic diagram of the structure of a medical catheter system including an inner catheter, an outer catheter, and two handle assemblies provided in Embodiment 2 of this utility model;

[0067] Figure 32 A cross-sectional view of a medical catheter system including a single-connector handle assembly provided in Embodiment 2 of this utility model;

[0068] Figure 33 A cross-sectional view of a medical catheter system including a three-joint handle assembly provided in Embodiment 2 of this utility model;

[0069] Figure 34 A cross-sectional view of a medical catheter system including an inner catheter, an outer catheter, and two handle assemblies, provided for Embodiment 2 of this utility model;

[0070] Figure 35 Another cross-sectional view of the medical catheter system including a three-joint handle assembly provided in Embodiment 2 of this utility model;

[0071] Figure 36 Another cross-sectional view of a medical catheter system including an inner catheter, an outer catheter, and two handle assemblies provided in Embodiment 2 of this utility model;

[0072] Figure 37 This is a cross-sectional view of a medical catheter system including a dual-joint handle assembly, provided in Embodiment 2 of this utility model.

[0073] Icons: 1-Connecting module; 10-Catheter channel; 11-Through hole; 12-First end cap; 13-Sealing body; 14-Second end cap; 2-Connector; 20-Connecting tube; 3-Sealing ring; 4-Handle housing; 40-Receiving groove; 5-Limiting structure; 50-Limiting protrusion; 51-Limiting groove; 6-Support frame; 60-Card slot; 61-Support groove; 62-Support hole; 7-Locking structure; 8-Medical catheter; 80-Working hole; 81-Cavity; 82-Inner catheter; 83-Outer catheter; 84-Guidewire outlet; 85-Injection outlet; 86-Seal; 9-Balloon; 90-Balloon orifice. Detailed Implementation

[0074] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0075] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0076] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0077] Example 1:

[0078] like Figure 1 and Figure 2 As shown, the handle assembly provided in this embodiment includes a connection module 1 with an internal conduit channel 10; as Figure 3 and Figure 4 As shown, at least one end of the conduit channel 10 is provided with an opening, and at least a portion of the inner wall of the conduit channel 10 is provided with a sealing portion for fitting and sealing with an object extending into the conduit channel 10.

[0079] The handle assembly provided in this embodiment can be used in combination with medical catheters 8 such as infusion tubes, drug delivery tubes, drainage tubes, and flushing tubes to perform operations such as infusion, gas injection, and suction. The connecting module 1 can be connected to... Figures 25-37 The medical catheter 8 shown is detachably connected. Specifically, the opening of the catheter channel 10 is for the medical catheter 8 to pass through, and the catheter channel 10 is used to accommodate the medical catheter 8. At this time, the medical catheter 8 is connected to the connecting module 1 by a plug-in connection. Correspondingly, the object inserted into the catheter channel 10 at this time is the medical catheter 8. It should be noted that the detachable connection between the connecting module 1 and the medical catheter 8 includes two states: connection first and then detachment, and detachment first and then connection.

[0080] The medical catheter 8 typically has a proximal end and a distal end. The distal end is inserted into the patient's body, while the proximal end connects to a handle to facilitate procedures such as insertion, infusion, pneumatic infusion, or suction of the medical catheter 8. During surgery, a slender guiding channel, such as an interventional catheter or endoscope, can be inserted into the patient's body first. The proximal end of the medical catheter 8 is then connected to the connecting module 1 in the handle assembly provided in this embodiment, thus connecting the medical catheter 8 to the handle assembly. The distal end and the proximal portion of the medical catheter 8 are then placed into the patient's body through the guiding channel, allowing for surgical treatment using the medical catheter 8 and the handle assembly.

[0081] In the handle assembly provided in this embodiment, after the medical catheter 8 is inserted into the catheter channel 10 of the connecting module 1, its outer wall can be sealed and fitted with the sealing part of the inner wall of the catheter channel 10. Therefore, after the medical catheter 8 is connected to the connecting module 1, its connection can be sealed. That is, after the medical catheter 8 and the handle assembly are assembled together, the sealing of its connection can be effectively guaranteed. At this time, the medical catheter 8 and the handle assembly can be used to perform medical operations such as injection, gas injection, and suction normally.

[0082] After surgical treatment, when it is necessary to leave the medical catheter 8 in the patient's body and remove the guiding channel from the patient's body, the proximal end of the medical catheter 8 can be removed from the catheter channel 10 of the connecting module 1, thereby separating the medical catheter 8 from the handle assembly. Since there is no handle assembly obstructing the proximal end of the medical catheter 8, the guiding channel can be removed directly while the medical catheter 8 is retained.

[0083] Taking endoscopic surgery of the digestive tract as an example, doctors often insert a medical catheter 8 into the digestive tract through the endoscopic channel (i.e., the guide channel) to perform surgical procedures such as flushing, drainage, dilation, or drug administration. However, when withdrawing the endoscopic channel but leaving the medical catheter 8 in place, the endoscopic channel cannot be directly withdrawn because its size is much smaller than the handle at the proximal end of the medical catheter 8. If the handle at the proximal end of the medical catheter 8 is the handle assembly in this embodiment, the handle assembly can be directly separated from the proximal end of the medical catheter 8, and then the endoscopic channel can be withdrawn, thus quickly completing the operation of withdrawing the endoscopic channel and leaving the medical catheter 8 in place.

[0084] It should be noted that after the endoscope forceps and other guiding channels are removed, in order to ensure that the medical catheter 8 can continue to be used normally, the proximal end of the medical catheter 8 can be reinserted into the catheter channel 10 in the connecting module 1 to reassemble the medical catheter 8 and the handle assembly.

[0085] As can be seen, the connection module 1 in this embodiment allows the handle assembly to be used as an independent handle. It not only ensures the sealing of the connection between the medical catheter 8 and the handle assembly after assembly, thus guaranteeing the normal function of the medical catheter 8 and the handle assembly, but also facilitates the flexible assembly and disassembly of the handle assembly at the proximal end of the medical catheter 8 according to usage needs. During the process of withdrawing the guide channel from the patient's body, it is only necessary to directly withdraw the guide channel from the patient's body after separating the medical catheter 8 and the handle assembly. There is no need to first insert the guidewire into the patient's body, nor is it necessary to withdraw the medical catheter 8 and the guide channel together and then reinsert the medical catheter 8 into the patient's body along the guidewire. This effectively simplifies the withdrawal operation of the guide channel, optimizes the surgical procedure, and can not only effectively improve surgical efficiency, reduce surgical costs and surgical time, but also effectively reduce surgical risks, thereby reducing harm to the patient and bringing great benefits to both medical staff and patients.

[0086] Compared with the prior art, the handle assembly provided in this embodiment allows objects to be inserted through the catheter channel 10 and opening of the connecting module 1, realizing a detachable connection between the handle assembly and the medical catheter 8. The sealing part ensures the sealing of the connection between the medical catheter 8 and the handle assembly. This facilitates the removal of the guide channel after surgery when the medical catheter 8 is left in the patient's body. The guide channel can be directly removed by first separating the medical catheter 8 from the handle assembly. After the guide channel is removed, the medical catheter 8 can be reconnected to the connecting module 1 to ensure normal use of the medical catheter 8. There is no need to perform complicated instrument exchange operations, which effectively improves the convenience of operation, surgical safety and surgical efficiency.

[0087] like Figure 2 , Figures 9-15 As shown, the handle assembly provided in this embodiment may further include a connector 2; as Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, a through hole 11 is provided between the side wall of the connecting module 1 and the catheter channel 10. The end of the through hole 11 located on the side wall of the connecting module 1 is connected to the connector 2. The end of the through hole 11 located inside the connecting module 1 is used to connect with the working hole 80 on the medical catheter 8 inside the catheter channel 10.

[0088] It should be noted that the medical catheter 8 typically has an internal cavity 81, which is connected to a corresponding working port 80, such as an injection port, an air injection port, or a suction port. Corresponding to the function of the working port 80, the internal cavity 81 of the medical catheter 8 is typically used for operations such as injection, air injection, and suction.

[0089] In this embodiment, the connector 2 is used to communicate with external instruments such as syringes, and the through hole 11 is used to connect the connector 2 with the catheter channel 10. When the medical catheter 8 is inserted into the catheter channel 10, the through hole 11 can also connect with the working hole 80 on the medical catheter 8, thereby enabling the connection between the working hole 80 of the medical catheter 8 and external instruments through the connector 2.

[0090] In addition, such as Figure 23 As shown, when only one end of the catheter channel 10 in the connecting module 1 has an opening, the other end of the catheter channel 10 is closed. When the medical catheter 8 is inserted into the catheter channel 10, the proximal end of the medical catheter 8 can be automatically sealed. Injection of fluid or gas into the medical catheter 8 can be performed through the through hole 11 on the connecting module 1 and the connector 2 connected to the through hole 11. Figure 3 and Figure 24As shown, when both ends of the catheter channel 10 in the connection module 1 are provided with openings, one opening allows the proximal end of the medical catheter 8 to pass through, and the other opening can be connected to a connector 2, which can also be connected to an external instrument. At this time, the proximal end of the medical catheter 8 can also be used as a working port 80.

[0091] like Figure 4 As shown, there can be multiple connecting modules 1, which are distributed sequentially along the extension direction of the medical catheter 8, and the catheter channels 10 between any two adjacent connecting modules 1 are interconnected; the catheter channels 10 in the multiple connecting modules 1 are used to accommodate the same medical catheter 8, and the through holes 11 on the multiple connecting modules 1 are used to connect one-to-one with the multiple working holes 80 distributed at intervals on the medical catheter 8.

[0092] The internal cavity 81 of the medical catheter 8 can be one (i.e., single cavity) or multiple (i.e., multi-cavity). When the internal cavity 81 of the medical catheter 8 is multi-cavity, the multiple cavities need to be isolated from each other, and the multiple cavities 81 are used for different operations. For example, one cavity 81 can be used for liquid injection, and another cavity 81 can be used for gas injection. When a guidewire needs to be inserted into the medical catheter 8, the guidewire can share a cavity with the above-mentioned liquid injection or gas injection cavity 81, or an additional cavity 81 can be set in the medical catheter 8 for the introduction of the guidewire.

[0093] When the internal cavity 81 of the medical catheter 8 is multi-cavity, in order to enable the handle assembly to be compatible with the multi-cavity to ensure the multifunctional operation of the medical catheter 8, the connecting module 1 also needs to be configured as multiple. In order to enable the multi-cavity of the medical catheter 8 to be connected to multiple external instruments one by one through multiple connecting modules 1, this embodiment limits the multiple working holes 80 on the medical catheter 8 to be distributed at intervals along its extension direction, and the distance between two adjacent working holes 80 is greater than the length of the catheter channel 10 inside the connecting module 1.

[0094] Based on this, multiple connecting modules 1 are sequentially distributed along the extension direction of the medical catheter 8, so that the distribution direction of the multiple connecting modules 1 is the same as the distribution direction of the working holes 80. This allows the through holes 11 on the multiple connecting modules 1 to communicate one-to-one with the multiple working holes 80, realizing the corresponding communication between the multiple connecting modules 1 and the multi-lumen channels of the medical catheter 8. At this time, the end of the through hole 11 on each connecting module 1 away from the catheter channel 10 can be connected to a connector 2. The connector 2 is used to communicate with the external instrument corresponding to the working hole 80 that is connected to the connecting module 1.

[0095] It can be seen that the number of connectors 2 corresponds to the number of internal cavities 81 of the medical catheter 8. For example, as Figure 10As shown, when connector 2 is a single unit, the handle assembly is a single-connector handle assembly, which is adapted to single-lumen medical catheters. Figure 11 , Figure 12 and Figure 13 As shown, when there are two connectors 2, the handle assembly is a dual-connector handle assembly, which is adapted to dual-lumen medical catheters. Figure 14 and Figure 15 As shown, when there are three connectors 2, the handle assembly is a three-connector handle assembly, and the corresponding three-connector handle assembly is adapted to a three-lumen medical catheter.

[0096] Furthermore, in this embodiment, the catheter channels 10 between any two adjacent connecting modules 1 are interconnected, which can ensure that the same medical catheter 8 can be sequentially inserted into the catheter channels 10 within multiple connecting modules 1.

[0097] It should be noted that, since the inner wall of the catheter channel 10 can be sealed and fitted with the outer wall of the medical catheter 8 inserted into it, when the medical catheter 8 is sequentially inserted into the catheter channels 10 in multiple connecting modules 1 and the through hole 11 is connected to the working hole 80, the multiple working holes 80 can be isolated from each other by the seal between the inner wall of the catheter channel 10 and the outer wall of the medical catheter 8, thereby preventing the different cavities 81 of the medical catheter 8 from being mixed due to the connection of the working holes 80.

[0098] As can be seen, when there are multiple connecting modules 1 in the handle assembly provided in this embodiment, the multiple connecting modules 1 are also independent of each other, which can realize independent sealing between multiple cavities 81 of the medical catheter 8, and at the same time realize one-to-one correspondence between multiple cavities 81 and multiple external instruments. Therefore, the handle assembly provided in this embodiment can be adapted to medical catheters 8 of various types and different numbers of cavities 81, and has a wide range of applications.

[0099] It should be noted that when there are multiple connection modules 1, such as... Figure 12 As shown, only the catheter channel 10 in the connection module 1 near the proximal end of the medical catheter 8 can have an opening at only one end, while the catheter channels 10 in the other connection modules 1 must have openings at both ends so that the catheter channels 10 in two adjacent connection modules 1 can communicate with each other.

[0100] In this embodiment, the sealing part is an annular part and is provided in two sets. The inner wall of the sealing part is used to seal and fit with the outer wall of the medical catheter 8 that extends into the catheter channel 10. The two sets of sealing parts form a closed cavity in the catheter channel 10. The closed cavity is used to communicate with the working hole 80 on the medical catheter 8 when the medical catheter 8 extends into the catheter channel 10, so as to form a working passage with the medical catheter 8.

[0101] When the medical catheter 8 is inserted into the catheter channel 10, its working hole 80 at least partially enters the sealed cavity. At this time, the working hole 80 can communicate with the through hole 11 on the connecting module 1 through the sealed cavity, so that liquid or gas entering from the connector 2 can enter the working passage formed between the sealed cavity and the medical catheter 8. The inner diameter of the sealed cavity can be larger than the inner diameter of the medical catheter 8. Inserting the medical catheter 8 into the catheter channel 10 so that the working hole 80 is located in the sealed cavity achieves communication between the working hole 80 and the through hole 11, eliminating the need to adjust the position of the medical catheter 8 to align the working hole 80 with the through hole 11, thus improving the ease of use of the handle assembly.

[0102] Furthermore, such as Figure 5 and Figure 6 As shown, the connecting module 1 includes a first end cap 12 and a hollow sealing body 13. The first end cap 12 is connected to one end of the sealing body 13, and an opening is provided on the first end cap 12. The sealing part is a sealing ring 3 that can deform radially. The inner diameter of the sealing ring 3 is not greater than the inner diameter of the conduit channel 10, and the sealing ring 3 abuts between the first end cap 12 and the sealing body 13. The first end cap 12 can move relative to the sealing body 13 along its axial direction to deform the sealing ring 3 between the first end cap 12 and the sealing body 13, and the first end cap 12 can maintain its fixed position after moving relative to the sealing body 13.

[0103] The first end cap 12 is annular, and the space inside the first end cap 12 and the hollow part of the sealing body 13 are interconnected to form the conduit channel 10.

[0104] The sealing part is a sealing ring 3 that can deform radially, which allows the sealing module 1 in this embodiment to be adapted to medical catheters 8 of different diameters, further expanding the applicability of the handle assembly.

[0105] To ensure a good seal, the sealing part must be made of sealing material.

[0106] To achieve radial deformation of the sealing part, the sealing part can be a silicone layer covering the inner wall of the conduit channel 10, or the sealing part can be a sealing ring 3. There can be one or more sealing rings 3. When multiple sealing rings 3 are used in the sealing part, the multiple sealing rings 3 are distributed sequentially along the axial direction of the conduit channel 10.

[0107] As the first end cap 12 moves axially relative to the sealing body 13, the closer the first end cap 12 gets to the sealing body 13 (at which point the first end cap 12 moves axially relative to the sealing body 13), the more it moves. Figure 5 and Figure 6If the first end cap 12 moves in the direction of the arrow shown, the compression of the sealing ring 3 will be greater, and the inner diameter of the sealing ring 3 will be smaller, so that it can be adapted to a smaller diameter medical catheter 8; conversely, the inner diameter of the sealing ring 3 will be larger, so that it can be adapted to a larger diameter medical catheter 8.

[0108] As can be seen, when the connecting module 1 includes a first end cap 12 and a sealing ring 3 abuts between the first end cap 12 and the sealing body 13, the inner diameter of the sealing ring 3 can be adjusted by adjusting the moving distance of the first end cap 12 relative to the sealing body 13, so that the connecting module 1 can be adapted to medical catheters 8 of different diameters.

[0109] When the connecting module 1 is provided with a through hole 11, such as Figures 5-7 As shown, the through hole 11 needs to be provided on the sealing body 13 to ensure that the through hole 11 is located in the sealed cavity between the two sets of sealing parts.

[0110] There are no restrictions on the connection method between the first end cap 12 and the sealing body 13, as long as it allows the first end cap 12 to move relative to the sealing body 13 and remain fixed in position after movement. For example, Figure 3 , Figure 5 and Figure 6 As shown, the first end cap 12 and the sealing body 13 can be slidably connected along the axial direction of the first end cap 12, or, as... Figure 4 and Figure 7 As shown, the first end cap 12 and the sealing body 13 are threaded together. When the first end cap 12 and the sealing body 13 are slidably connected along the axial direction of the first end cap 12, the position of the first end cap 12 after movement can be fixed by means of snap-fit, pin, or interference fit.

[0111] In this embodiment, as Figure 3 , Figure 5 and Figure 6 As shown, the first end cap 12 and the sealing body 13 can be slidably connected along the axial direction of the first end cap 12, or, as... Figure 4 and Figure 7 As shown, the first end cap 12 is threadedly connected to the sealing body 13.

[0112] Furthermore, such as Figure 3 and Figure 4 As shown, the connecting module 1 may further include a second end cap 14, which is connected to the end of the sealing body 13 away from the first end cap 12; a sealing ring 3 abuts between the second end cap 14 and the sealing body 13; the second end cap 14 is movable relative to the sealing body 13 along its axial direction to deform the sealing ring 3 between the second end cap 14 and the sealing body 13, and the second end cap 14 is able to maintain its fixed position after moving relative to the sealing body 13.

[0113] The second end cap 14 is also annular. At this time, the annular space of the first end cap 12, the hollow part of the sealing body 13, and the annular space of the second end cap 14 are interconnected to form the conduit channel 10.

[0114] The connecting module 1 also includes a second end cap 14. When a sealing ring 3 is provided between the second end cap 14 and the sealing body 13, the sealing ring 3 on one side of the first end cap 12 and the sealing ring 3 on one side of the second end cap 14 can cooperate with each other to provide stability support for the medical catheter 8 and improve the balance of the medical catheter 8 in the catheter channel 10. In addition, the sealing ring 3 on one side of the second end cap 14 can also cooperate with the sealing ring 3 on one side of the first end cap 12 to form a sealed space in the catheter channel 10. This sealed space is used to accommodate the tube body of the medical catheter 8 with a working hole 80, thereby ensuring the airtightness of the space where the working hole 80 is located.

[0115] There are no restrictions on the connection method between the second end cap 14 and the sealing body 13, as long as the second end cap 14 can move relative to the sealing body 13 and remain fixed in position after movement. For example, the second end cap 14 and the sealing body 13 can be slidably connected along the axial direction of the second end cap 14, or the second end cap 14 and the sealing body 13 can be threaded together. When the second end cap 14 and the sealing body 13 are slidably connected along the axial direction of the second end cap 14, the position of the second end cap 14 after movement can be fixed by means of snap-fit, pin, or interference fit.

[0116] When there are multiple connecting modules 1, adjacent connecting modules 1 can be fixedly connected. Furthermore, when the connecting module 1 also includes a first end cap 12 and a second end cap 14, in order to achieve a fixed connection between adjacent connecting modules 1, the first end cap 12 and the second end cap 14 that are close to each other in adjacent connecting modules 1 can be fixedly connected by means of integral molding or other methods. At this time, assembling the first end cap 12 with the connecting module 1 and assembling the second end cap 14 with the connecting module 1 can sequentially achieve a fixed connection of multiple connecting modules 1, effectively improving the assembly efficiency of the handle assembly.

[0117] like Figure 8 and Figure 9 As shown, the handle assembly provided in this embodiment may further include a handle housing 4, with a receiving groove 40 inside the handle housing 4, and the connecting module 1 disposed in the receiving groove 40.

[0118] The handle housing 4 is used to protect the connection module 1. When there are multiple connection modules 1, the handle housing 4 can also integrate multiple connection modules 1 into one, thereby improving the overall structural integrity of the handle assembly.

[0119] Furthermore, such as Figure 9As shown, a limiting structure 5 is provided between the inner wall of the receiving groove 40 and the outer wall of the connecting module 1. The limiting structure 5 includes a limiting protrusion 50 and a limiting groove 51. One of the limiting protrusion 50 and the limiting groove 51 is provided on the inner wall of the receiving groove 40, and the other is provided on the outer wall of the connecting module 1. The limiting protrusion 50 extends into the limiting groove 51 to limit the axial movement of the connecting module 1 along the handle housing 4.

[0120] When the connecting module 1 is provided with a through hole 11, the limiting structure 5 can not only improve the positional stability of the connecting module 1 in the receiving groove 40 of the handle housing 4, but also effectively prevent the connecting module 1 from rotating randomly in the receiving groove 40 and affecting the position of its through hole 11, thereby preventing the accuracy of the docking and connection between the through hole 11 and the working hole 80 of the medical catheter 8 from being affected.

[0121] To facilitate the assembly of the handle assembly, the handle housing 4 can be formed by mating two half-housing units, and the two half-housing units can be detachably connected by fasteners such as screws or snap-fit ​​structures.

[0122] like Figures 10-20 As shown, the handle assembly provided in this embodiment also includes a support frame 6, which is located on one side of the connecting module 1; the connector 2 and the through hole 11 are connected by a connecting pipe 20, the support frame 6 is provided with a slot 60, and the connecting pipe 20 is snapped into the slot 60; and / or, both ends of the catheter channel 10 are provided with openings, and the openings at both ends of the catheter channel 10 are used for the proximal end of the medical catheter 8 to pass through in sequence; the support frame 6 is provided with a support groove 61 or a support hole 62, the support groove 61 is used to accommodate the proximal end of the medical catheter 8 outside the catheter channel 10, and the support hole 62 is used for the proximal end of the medical catheter 8 outside the catheter channel 10 to pass through.

[0123] The support frame 6 is used to support the connecting pipe 20 between the connector 2 and the connecting module 1, making the distribution of the connecting pipe 20 more orderly, thereby making it easier for medical staff to identify the connector 2 corresponding to each connecting module 1 and improving the ease of use of the handle assembly.

[0124] The slot 60 is used to connect the support frame 6 and the connecting pipe 20, thereby improving the ease of installation and removal of the connecting pipe 20.

[0125] When the handle assembly includes the handle housing 4, the support frame 6 can be connected to the handle housing 4.

[0126] like Figure 16 , Figure 19 and Figure 20 As shown, the support frame 6 may include one or more support rods, each support rod having at least one slot 60. When the support frame 6 includes one support rod, one end of the support rod is connected to the handle housing 4; as shown... Figures 16-18As shown, when the support frame 6 includes multiple support rods, one end of each support rod is connected to a point, and that point may have a rod perpendicular to the support rod, which is connected to the handle housing 4.

[0127] The insertion rod can be inserted into the handle housing 4 so that the support frame 6 can rotate relative to the handle housing 4, thereby facilitating the flexible adjustment of the position of the support frame 6 to engage different connectors 2 according to usage requirements.

[0128] Furthermore, there are no restrictions on the orientation of the card slot 60, such as... Figure 16 and Figure 20 As shown, when the slot 60 is located at one end of the support rod, the opening of the slot 60 can face away from the other end of the support rod; as Figure 19 As shown, when the slot 60 is provided on one side of the support rod, the opening of the slot 60 can face away from the other side of the support rod.

[0129] To improve the stability of the medical catheter 8 within the catheter channel 10, this embodiment preferably provides openings at both ends of the catheter channel 10, and as follows: Figure 17 and Figure 18 As shown, the support frame 6 is provided with a support groove 61 or a support hole 62. The support groove 61 is used to accommodate the proximal end of the medical catheter 8 outside the catheter channel 10, which can improve the stability of the medical catheter 8. The support hole 62 is used for the proximal end of the medical catheter 8 outside the catheter channel 10 to pass through, which can also support the medical catheter 8 to improve its stability.

[0130] It should be noted that the selection of the support groove 61 and support hole 62 needs to be determined based on whether the proximal end of the medical catheter 8 is used as the working port 80. Specifically, when the proximal end of the medical catheter 8 is not required to be used as the working port 80, in order to ensure that the proximal end of the medical catheter 8 can be closed, such as... Figure 17 As shown, the support frame 6 can be provided with a support groove 61 to accommodate the proximal end of the medical catheter 8. The proximal end of the medical catheter 8 extends into the support groove 61 and abuts against the inner wall of the support groove 61. When the proximal end of the medical catheter 8 is used as a working port 80, that is, when the proximal end of the medical catheter 8 needs to be connected to the connector 2 via the connecting tube 20, as... Figure 15 and Figure 18 As shown, the support frame 6 needs to be provided with a support hole 62 for the proximal end of the medical catheter 8 to pass through.

[0131] like Figure 21 and Figure 22 As shown, a locking structure 7 is movably connected to the handle housing 4. The locking structure 7 includes a locking part located within the catheter channel 10. The locking structure is used to move on the handle housing 4 to move the locking part and fix the medical catheter 8 within the catheter channel 10. The locking structure 7 can be an existing stopcock structure.

[0132] Example 2:

[0133] like Figures 25-37 As shown, the medical catheter system provided in this embodiment includes a medical catheter 8 and the above-mentioned handle assembly. The medical catheter 8 includes a proximal end and a distal end. The proximal end of the medical catheter 8 passes through the opening of the catheter channel 10 and extends into the catheter channel 10.

[0134] Among them, medical catheters include drainage tubes, injection tubes, feeding tubes, dilation catheters, stone removal catheters, occlusion catheters, urinary catheters, central venous catheters, and vascular / nerve perforation catheters.

[0135] Since the medical catheter system provided in this embodiment includes the above-mentioned handle assembly, the medical catheter system provided in this embodiment has the beneficial effects of the handle assembly in the first embodiment, which will not be repeated here.

[0136] In this embodiment, the medical catheter 8 may also have one or more cavities 81 inside.

[0137] like Figure 32 As shown, when the medical catheter 8 has a cavity 81 inside, the tube body of the medical catheter 8 located within the catheter channel 10 has a working hole 80 communicating with the cavity 81; there is one connecting module 1, and the through hole 11 between the side wall of the connecting module 1 and the catheter channel 10 communicates with the working hole 80. Further, as... Figure 25 As shown, at this time, the through hole 11 can be connected to only one connector 2 through the connecting pipe 20.

[0138] The single-lumen medical catheter 8 can be used as a nasoenteric feeding tube or a nasobiliary drainage tube. Specifically, during the placement of a nasoenteric feeding tube, the single-lumen nasoenteric feeding tube can be inserted through an endoscopic forceps channel pre-placed in the patient's body. The endoscopic forceps channel is then withdrawn, and the handle assembly is installed at the proximal end of the nasoenteric feeding tube. After placement, nutrients and medication can be continuously delivered to the intestines through the handle assembly and the medical catheter 8.

[0139] In endoscopic retrograde cholangiopancreatography (ERCP), doctors usually place a single-lumen nasobiliary drainage tube in the patient's bile duct for short-term drainage of bile and stones. When using the medical catheter system provided in this embodiment, the handle assembly can be assembled to the proximal end of the medical catheter 8, which serves as the nasobiliary drainage tube. Then, the handle assembly can be used to communicate with external instruments to perform negative pressure aspiration of the bile duct, thereby improving drainage efficiency and effectiveness.

[0140] In this embodiment, as Figure 33As shown, the medical catheter 8 may also have multiple mutually isolated cavities 81 inside. In this case, the medical catheter 8 has multiple working holes 80 distributed axially along its tube body located in the catheter channel 10. The multiple working holes 80 are connected to the multiple cavities 81 one by one. Correspondingly, there are multiple connecting modules 1. The proximal end of the medical catheter 8 passes through the catheter channels 10 in multiple connecting modules 1 in sequence and is located in the medical channel in the connecting module 1 far from the end of the medical catheter 8. The multiple working holes 80 are connected to the through holes 11 on the multiple connecting modules 1 located between their side walls and the catheter channels 10 one by one.

[0141] Furthermore, such as Figure 26 and Figure 27 As shown, multiple connectors 2 can be used at this time, and multiple connectors 2 are connected to multiple through holes 11 on the connecting module 1 in a one-to-one manner. Among them, the connectors 2 and the through holes 11 can be connected by a connecting pipe 20.

[0142] Multi-lumen medical catheters can also be used as nasoenteric feeding tubes or nasobiliary drainage tubes. Specifically, for nasoenteric feeding tubes, if used during surgery... Figure 33 and Figure 27 The medical catheter system shown, consisting of a three-lumen medical catheter and a three-connector handle assembly, allows for simultaneous intestinal flushing, nutrition, and decompression procedures through the three lumens 81 during use. The three lumens 81 are separated and sealed from each other by the three-connector handle assembly, preventing cross-contamination and mutual interference, thus improving surgical outcomes and efficiency.

[0143] For nasobiliary drainage tubes, if a single-lumen tube is used, simultaneous irrigation and drainage cannot be performed, easily leading to high pressure within the bile duct and pancreatic duct, causing serious complications. However, if a... Figure 26 The medical catheter system shown, consisting of a dual-lumen medical catheter and a dual-connector handle assembly, allows for simultaneous flushing and drainage of the bile duct through both lumens during use, thereby increasing the effectiveness of bile duct drainage and stone removal.

[0144] The medical catheter system provided in this embodiment can also be used as follows: Figure 28The combination of the multi-cavity medical catheter and single-connector handle assembly shown is as follows: Specifically, the medical catheter 8 has multiple isolated cavities 81 inside, and the tube body of the medical catheter 8 located in the catheter channel 10 has multiple working holes 80 distributed axially at intervals. The multiple working holes 80 are connected to the multiple cavities 81 one by one. There is one connecting module 1. Both ends of the catheter channel 10 are provided with openings. The proximal end of the medical catheter 8 can pass through the openings at both ends of the catheter channel 10 in sequence and extend out of the connecting module 1. The connecting module 1 is slidably connected to the medical catheter 8. During the sliding process relative to the medical catheter 8, the connecting module 1 can make its through hole 11 between its side wall and the catheter channel 10 connected to any of the working holes 80.

[0145] As the connecting module 1 slides relative to the medical catheter 8, its through hole 11 sequentially connects with multiple working holes 80 on the medical catheter 8. This allows the handle assembly to connect with and seal different cavities 81, facilitating the sequential performance of different surgical procedures using the different cavities 81. For example, when the medical catheter 8 is a three-cavity feeding tube, it has three working holes 80. When the connecting module 1 is moved to different working holes 80, the handle assembly can be connected to the three cavities 81 respectively, enabling different surgical procedures such as flushing, nutrient delivery, and decompression.

[0146] As can be seen, the medical catheter 8 has multiple isolated cavities 81 inside, and when the connecting module 1 is slidably connected to the medical catheter 8, a handle assembly can be used to cooperate with the medical catheter 8 which has multiple cavities 81 inside to perform a variety of surgical operations in sequence, which effectively improves the adaptability of the handle assembly and the convenience of surgical operation.

[0147] like Figures 25-31 , Figures 34-37 As shown, a balloon 9 may be provided on the outside of the tube body near its distal end of the medical catheter 8, and at least one cavity 81 in the medical catheter 8 is a balloon cavity. A balloon hole 90 is provided on the tube body of the medical catheter 8 located at the balloon 9, and the balloon 9 and the balloon cavity are connected through the balloon hole 90.

[0148] The balloon 9 is used to position the medical catheter 8 in the patient's body after it is inflated. At this time, one of the multiple working holes 80 near the proximal end of the medical catheter 8 is an inflation hole, and the inflation hole is connected to the balloon cavity.

[0149] When using the medical catheter 8, the distal end of the medical catheter 8 and the balloon 9 can be inserted into the patient's body first. Then, one of the connecting modules 1 in the handle assembly is connected to the medical catheter 8, so that the filling port is connected to the through hole 11 on the connecting module 1. Subsequently, gas or liquid can be injected into the balloon cavity through the connector 2 connected at the through hole 11, so that the balloon 9 inflates and abuts against the inner wall of the intestines or other passages in the patient's body to achieve the positioning purpose.

[0150] In this embodiment, to facilitate the positioning of the medical catheter 8 or balloon 9, a radiopaque ring that can be visualized under X-ray can be installed at the distal end of the medical catheter 8.

[0151] In practical applications, for nasobiliary drainage tubes, if used during surgery... Figure 27 and Figure 35 The medical catheter system shown, consisting of balloon 9, a three-channel medical catheter, and a three-connector handle assembly, allows the balloon 9 to be inflated through one of the channels 81 during surgery to block the distal end of the bile duct and prevent the medical catheter 8 from dislodging from the bile duct. Then, the remaining two channels 81 are used for flushing and drainage, further reducing surgical risks.

[0152] Furthermore, in endoscopic ultrasound-guided gastrojejunostomy (EUS-GE), the surgeon places a nasobiliary tube in the jejunum during the procedure to inject fluid and expand the target jejunal segment, thereby assisting in ultrasound-guided puncture and anastomosis of the target intestinal lumen. However, existing nasobiliary tubes are single-lumen medical catheters with non-detachable handles. Therefore, when placing the nasobiliary tube, a guidewire must first be inserted into the endoscope already in place in the patient's body, then the endoscope is exchanged and removed from the body, the nasobiliary tube is inserted along the guidewire, and finally the guidewire is removed. Moreover, the fluid injected through the existing nasobiliary tubes tends to flow down the intestines, causing the target intestinal lumen to fail to fill and expand, while other intestinal cavities receive excessive fluid, affecting the accuracy of ultrasound imaging.

[0153] If this embodiment is adopted Figure 27 and Figure 35 The medical catheter system, consisting of a three-lumen medical catheter and a three-connector handle assembly, can solve the aforementioned problems during gastrojejunostomy. Specifically, the three lumens 81 of the medical catheter 8 serve as the balloon cavity, the injection cavity, and the guidewire cavity, respectively. During use, the physician inserts the medical catheter 8 into the patient's body through an endoscope placed in the patient's body as a guide channel. Then, the handle assembly is removed, and the endoscope is withdrawn directly. Subsequently, without withdrawing the guidewire, the balloon 9 is inflated to block the distal end of the target intestinal lumen. Then, fluid is injected through the injection cavity. At this time, the fluid cannot flow to the distal intestine, thus filling and expanding the target intestinal lumen to achieve the expected surgical requirements.

[0154] In this embodiment, there can be two medical catheters 8, such as... Figure 29 , Figure 30 , Figure 31 , Figure 34 and Figure 36 As shown, one medical catheter 8 is an inner catheter 82, and the other medical catheter 8 is an outer catheter 83. The outer catheter 83 is sleeved over the inner catheter 82, and the proximal end of the inner catheter 82 passes through the proximal end of the outer catheter 83 and protrudes outside the outer catheter 83. Correspondingly, there are two handle assemblies, one of which is a proximal handle and the other is a distal handle. The proximal end of the outer catheter 83 extends into the catheter channel 10 in the distal handle. The distal end of the catheter channel 10 in the distal handle, away from the distal end of the outer catheter 83, has an opening, which is a proximal opening. The proximal end of the inner catheter 82 passes through the catheter channel 10 in the distal handle and extends into the catheter channel 10 in the proximal handle through the proximal opening. The proximal opening is sealed with the outer wall of the inner catheter 82.

[0155] This configuration allows the medical catheter system to consist of two medical catheters and a dual-handle assembly, thus enabling the medical catheter system to have more functions.

[0156] Furthermore, such as Figure 29 , Figure 31 and Figure 36 As shown, a balloon 9 may also be provided on the inner catheter 82, and this balloon 9 is a distal balloon; correspondingly, as... Figure 30 , Figure 31 , Figure 34 and Figure 36 As shown, a balloon 9 can also be provided on the external catheter 83, and the balloon 9 is a proximal balloon.

[0157] For nasoenteric feeding tubes, this can be used. Figure 34 The medical catheter system shown, consisting of a proximal balloon, two medical catheters, and a dual-handle assembly, allows for surgical procedures. During use, the inflated proximal balloon can be used to block the lumen of the proximal digestive tract. Then, medication, nutrition, and flushing are performed through the lumen 81 in the inner catheter 82 and the lumen 81 in the outer catheter 83, respectively. Because the lumen of the proximal digestive tract is blocked by the proximal balloon, the food, medication, flushing fluid, and other substances injected during the above procedures can only move towards the distal end of the digestive tract (anal side), thus preventing the reflux of substances towards the oral side.

[0158] For the nasobiliary duct during EUS-GE surgery, this can be achieved by using... Figure 31 and Figure 36The medical catheter system shown consists of a proximal balloon, a distal balloon, two medical catheters, and a dual-handle assembly. During use, the inflated proximal and distal balloons work together to seal both ends of the target intestinal lumen. Then, liquids or other substances are injected into the sealed intestinal lumen through the cavity 81 in the inner catheter 82. Since both ends of the intestinal lumen are sealed, the substance can only remain between the proximal and distal balloons, thereby improving the efficiency and effectiveness of filling.

[0159] like Figure 37 As shown, when the medical catheter 8 in the medical catheter system provided in this embodiment has two cavities 81 inside, the handle assembly is a double-connector handle assembly, and a balloon 9 is provided near the distal end of the medical catheter 8, one of the two cavities 81 inside the medical catheter 8 can be used as a balloon cavity for filling the balloon 9, and the other can be used as an injection cavity. At this time, the medical catheter 8 can be provided with two outlets that are spaced apart along its axial direction and are both connected to the injection cavity. Both outlets are located on the side of the balloon 9 near the proximal end of the medical catheter 8, and the outlet closer to the balloon 9 is the guidewire outlet 84, and the outlet further away from the balloon 9 is the injection outlet 85. A sealing element 86 is provided in the injection cavity between the guidewire outlet 84 and the injection outlet 85. The sealing element 86 is used to isolate the guidewire outlet 84 and the injection outlet 85.

[0160] During use, the guidewire can be inserted into the injection chamber through the distal end of the medical catheter 8 and then extended through the guidewire outlet 84. During injection, liquid can be injected into the injection chamber through the working port 80 near the proximal end of the medical catheter 8, and then the liquid is ejected from the injection outlet 85. It should be noted that because a sealing element 86 is provided between the guidewire outlet 84 and the injection outlet 85, the guidewire and the liquid will not interfere with each other.

[0161] It can be seen that this setup not only improves the operability of the guidewire, but also allows the guidewire and the injection process to share a single cavity 81. This allows for an increase in the orifice diameter of the injection cavity while keeping the outer diameter of the medical catheter 8 constant, thereby improving injection efficiency, surgical efficiency, and reducing the workload of medical staff.

[0162] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A handle assembly, characterized in that, Includes a connection module (1) with an internal conduit channel (10); The conduit channel (10) has an opening at at least one end, and at least a portion of the inner wall of the conduit channel (10) has a sealing portion for fitting and sealing with an object extending into the conduit channel (10).

2. The handle assembly according to claim 1, characterized in that, It also includes connector (2); A through hole (11) is provided between the side wall of the connecting module (1) and the catheter channel (10). The end of the through hole (11) located on the side wall of the connecting module (1) is connected to the connector (2). The end of the through hole (11) located inside the connecting module (1) is used to connect with the working hole (80) on the medical catheter (8) inside the catheter channel (10).

3. The handle assembly according to claim 2, characterized in that, There are multiple connecting modules (1), and the multiple connecting modules (1) are distributed sequentially along the extension direction of the medical catheter (8), and the catheter channel (10) between any two adjacent connecting modules (1) is interconnected. The catheter channels (10) in the multiple connecting modules (1) are used to accommodate the same medical catheter (8), and the through holes (11) on the multiple connecting modules (1) are used to communicate one-to-one with the multiple working holes (80) spaced apart on the medical catheter (8).

4. The handle assembly according to any one of claims 1-3, characterized in that, The sealing part is an annular part and has two sets. The inner wall of the sealing part is used to seal and fit with the outer wall of the medical catheter (8) that extends into the catheter channel (10). The two sets of sealing parts form a closed cavity in the catheter channel (10). The closed cavity is used to communicate with the working hole (80) on the medical catheter (8) when the medical catheter (8) extends into the catheter channel (10) to form a working passage with the medical catheter (8).

5. The handle assembly according to claim 4, characterized in that, The connection module (1) includes a first end cap (12) and a hollow sealing body (13). The first end cap (12) is connected to one end of the sealing body (13), and the opening is provided on the first end cap (12). The sealing part is a sealing ring (3) that can deform radially. The inner diameter of the sealing ring (3) is not greater than the inner diameter of the conduit channel (10), and the sealing ring (3) abuts between the first end cap (12) and the sealing body (13). The first end cap (12) is movable relative to the sealing body (13) along its axial direction to deform the sealing ring (3) between the first end cap (12) and the sealing body (13), and the first end cap (12) is able to remain in a fixed position after being moved relative to the sealing body (13).

6. The handle assembly according to claim 5, characterized in that, The connection module (1) further includes a second end cap (14), which is connected to the end of the sealing body (13) away from the first end cap (12); The sealing ring (3) abuts between the second end cap (14) and the sealing body (13). The second end cap (14) is movable relative to the sealing body (13) along its axial direction to deform the sealing ring (3) between the second end cap (14) and the sealing body (13), and the second end cap (14) is able to maintain a fixed position after moving relative to the sealing body (13).

7. The handle assembly according to claim 5, characterized in that, The first end cap (12) and the sealing body (13) are slidably connected along the axial direction of the first end cap (12), or the first end cap (12) and the sealing body (13) are threadedly connected.

8. The handle assembly according to claim 2 or 3, characterized in that, It also includes a support frame (6), which is located on one side of the connecting module (1); The connector (2) and the through hole (11) are connected by a connecting pipe (20), and the support frame (6) is provided with a slot (60), in which the connecting pipe (20) is engaged; and / or, Both ends of the catheter channel (10) are provided with openings, and the openings at both ends of the catheter channel (10) are used for the proximal end of the medical catheter (8) to pass through in sequence; the support frame (6) is provided with a support groove (61) or a support hole (62), the support groove (61) is used to accommodate the proximal end of the medical catheter (8) outside the catheter channel (10), and the support hole (62) is used for the proximal end of the medical catheter (8) outside the catheter channel (10) to pass through.

9. The handle assembly according to any one of claims 1-3, characterized in that, It also includes a handle housing (4), which has a receiving groove (40) inside, and the connecting module (1) is located in the receiving groove (40).

10. A medical catheter system, characterized in that, Includes a medical catheter (8) and a handle assembly as described in any one of claims 1-9, wherein the medical catheter (8) includes a proximal end and a distal end, and the proximal end of the medical catheter (8) extends into the catheter channel (10) after passing through the opening of the catheter channel (10).

11. The medical catheter system according to claim 10, characterized in that, The medical catheter (8) has a cavity (81) inside, and the medical catheter (8) has a working hole (80) connected to the cavity (81) on the tube body located in the catheter channel (10); The connecting module (1) is one, and the through hole (11) between the side wall of the connecting module (1) and the conduit channel (10) is connected to the working hole (80).

12. The medical catheter system according to claim 10, characterized in that, The medical catheter (8) has multiple mutually isolated cavities (81) inside. The medical catheter (8) has multiple working holes (80) spaced along its axial direction on its tube body located in the catheter channel (10). The multiple working holes (80) are connected to the multiple cavities (81) one by one. There are multiple connection modules (1). The proximal end of the medical catheter (8) passes through the catheter channels (10) in multiple connection modules (1) in sequence and is located in the medical channel in the connection module (1) far away from the medical catheter (8). The multiple working holes (80) are connected one-to-one with the through holes (11) on the multiple connection modules (1) located between their side walls and the catheter channels (10).

13. The medical catheter system according to claim 10, characterized in that, The medical catheter (8) has multiple mutually isolated cavities (81) inside. The medical catheter (8) has multiple working holes (80) spaced along its axial direction on its tube body located in the catheter channel (10). The multiple working holes (80) are connected to the multiple cavities (81) one by one. The connecting module (1) is one, and both ends of the catheter channel (10) are provided with openings. The proximal end of the medical catheter (8) can pass through the openings at both ends of the catheter channel (10) and extend out to the outside of the connecting module (1). The connecting module (1) is slidably connected to the medical catheter (8). The connecting module (1) can connect its sidewall to the through hole (11) between the catheter channel (10) and any of the working holes (80) during the sliding process relative to the medical catheter (8).

14. The medical catheter system according to claim 12, characterized in that, The medical catheter (8) has a balloon (9) on its outer side near its distal end, and at least one cavity (81) in the medical catheter (8) is a balloon cavity. The medical catheter (8) has a balloon hole (90) on its body located at the balloon (9), and the balloon (9) and the balloon cavity are connected through the balloon hole (90).

15. The medical catheter system according to any one of claims 11-14, characterized in that, There are two medical catheters (8), one of which is an inner catheter (82) and the other is an outer catheter (83); the outer catheter (83) is sleeved outside the inner catheter (82), and the proximal end of the inner catheter (82) passes through the proximal end of the outer catheter (83) and is exposed outside the outer catheter (83); The handle assembly consists of two parts, one of which is a proximal handle and the other is a distal handle. The proximal end of the external conduit (83) extends into the conduit channel (10) in the distal handle. The distal end of the conduit channel (10) in the distal handle, away from the external conduit (83), has an opening, which is a proximal opening. The proximal end of the internal conduit (82) passes through the conduit channel (10) in the distal handle and extends into the conduit channel (10) in the proximal handle through the proximal opening. The proximal opening is sealed to the outer wall of the internal conduit (82).

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