Handle assembly and medical catheter system

Abstract

The invention provides a handle assembly and a medical catheter system, and relates to the technical field of medical instruments. The handle assembly comprises a connecting module internally provided with a catheter channel. An opening is formed in at least one end of the catheter channel, a sealing part is arranged on at least part of the inner wall of the catheter channel, and the sealing part is used for being attached to and sealing an object extending into the catheter channel. According to the handle assembly, a medical catheter and other objects can be inserted into the handle assembly through the catheter channel and the opening of the connecting module, detachable connection between the handle assembly and the medical catheter is achieved, and the sealing performance of the connecting position of the medical catheter and other objects and the handle assembly can be guaranteed through the sealing part; therefore, after the operation, the medical catheter and the handle assembly are separated firstly, the guiding channel is directly withdrawn while the medical catheter is reserved, complex instrument exchange operation does not need to be executed, and the operation convenience, the operation safety and the operation efficiency are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a handle assembly and a medical catheter system. Background Art

[0002] In clinical practice, doctors often use medical catheters for surgical treatment. Medical catheters include infusion tubes, drug delivery tubes, drainage tubes, irrigation tubes, angiography catheters, catheters for endoscopes, etc. Most medical catheters are slender tubes. Based on the distance relationship between the medical catheter and the patient, the two ends of the medical catheter are respectively the distal end and the proximal end. The proximal end of the medical catheter is usually provided with a handle, and the handle is communicated with the internal cavity of the medical catheter. Through the handle and the connector on the handle, external instruments can be communicated with the medical catheter, so as to perform operations such as injecting liquid, suction, or inserting a guide wire into the patient's body through the internal cavity of the medical catheter.

[0003] Before placing the distal end of the medical catheter into the patient's body, it is often necessary to first place a slender guiding channel (such as an interventional catheter, an endoscope, etc.) into the patient's body, and then place the medical catheter along the guiding channel into the patient's body. After using the medical catheter for surgical treatment of the patient, it is often necessary to leave the medical catheter in the patient's body for continuous and long-term treatment, and at the same time, it is necessary to withdraw 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, and the size of the handle is usually much larger than the diameter of the guiding channel. Therefore, it is impossible to directly withdraw the guiding channel from the patient's body while leaving the medical catheter in the patient's body.

[0004] The existing method for withdrawing the guiding channel is usually to first place a guiding wire through the guiding channel into the patient's body after the operation, and then while retaining the wire, withdraw the medical catheter and the guiding channel together, and then re-insert the medical catheter along the wire into the patient's body. The processes of placing the wire, withdrawing the medical catheter and the guiding channel, and re-inserting the medical catheter not only increase the surgical cost and surgical time, but also are complex in operation, require high skills and cooperation from doctors and assistants, increase the surgical risk, and once an operation error occurs, it will lead to the failure of the operation and cause harm to the patient. Summary of the Invention

[0005] The purpose of the present invention is to provide a handle assembly and a medical catheter system to alleviate the technical problems existing in the prior art that when the medical catheter needs to be left in the patient's body after the operation and the guiding channel is withdrawn, it is necessary to first place the wire into the patient's body, then withdraw the medical catheter and the guiding channel, and then re-insert the medical catheter, which not only increases the surgical cost and surgical time, but also is complex in operation, requires high skills and cooperation from doctors and assistants, and increases the surgical risk.

[0006] In a first aspect, the present invention provides a handle assembly, including a connection module having a catheter channel therein;

[0007] At least one end of the catheter channel is provided with an opening, and at least a part of the inner wall of the catheter channel is provided with a sealing portion, and the sealing portion is used to fit and seal with an object extending into the catheter channel.

[0008] In an optional embodiment, it further includes a connector;

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

[0010] In an optional embodiment, there are a plurality of the connection modules, and the plurality of connection modules are sequentially distributed along the extending direction of the medical catheter, and the catheter channels between any two adjacent connection modules are communicated with each other;

[0011] The catheter channels in the plurality of connection modules are used to accommodate the same medical catheter, and the through holes on the plurality of connection modules are used to communicate with a plurality of working holes distributed at intervals on the medical catheter in a one-to-one correspondence.

[0012] In an optional embodiment, the sealing portion is an annular member and there are two sets. The inner wall of the sealing portion is used to seal and fit with the outer wall of the medical catheter extending into the catheter channel, and the two sets of sealing portions form a sealed cavity in the catheter channel. The sealed cavity is used to communicate with the working hole on the medical catheter when the medical catheter extends into the catheter channel, so as to form a working path with the medical catheter.

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

[0014] The sealing portion is a sealing ring that can be deformed along its radial direction. The inner diameter of the sealing ring is not greater than the inner diameter of the catheter channel, and the sealing ring is abutted between the first end cap and the sealing body;

[0015] The first end cap can move axially relative to the sealing body, so that the sealing ring between the first end cap and the sealing body is deformed, and the first end cap can remain fixed in position after moving relative to the sealing body.

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

[0017] A sealing ring is abutted between the second end cover and the sealing body. The second end cover can move axially relative to the sealing body so that the sealing ring between the second end cover and the sealing body is deformed, and the second end cover can be fixed in position after moving relative to the sealing body.

[0018] In an alternative embodiment, the first end cover is slidably connected to the sealing body along the axis of the first end cover, or the first end cover is threadedly connected to the sealing body.

[0019] In an alternative embodiment, a support frame is further included, and the support frame is disposed on one side of the connection module;

[0020] The joint and the through hole are communicated through a connecting pipe, and a clamping groove is provided on the support frame, and the connecting pipe is clamped in the clamping groove; and / or, openings are provided at both ends of the catheter channel, and the openings at both ends of the catheter channel are used for the proximal end of the medical catheter to pass through in sequence; a support groove or a support hole is provided on the support frame, the support groove is used for accommodating 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 alternative embodiment, a handle housing is further included, and a receiving groove is provided in the handle housing, and the connection module is disposed in the receiving groove.

[0022] In a second aspect, the present invention provides a medical catheter system, including a medical catheter and the handle assembly according to any one 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 alternative embodiment, a cavity is provided inside the medical catheter, and a working hole communicating with the cavity is provided on the tube body of the medical catheter located in the catheter channel;

[0024] There is one connection module, and the through hole between the side wall of the connection module and the catheter channel communicates with the working hole.

[0025] In an alternative embodiment, a plurality of mutually isolated cavities are provided inside the medical catheter, and a plurality of working holes are provided on the tube body of the medical catheter located in the catheter channel and are distributed at intervals along its axis. The plurality of working holes communicate with the plurality of cavities in one-to-one correspondence;

[0026] There are multiple connection modules. The proximal end of the medical catheter sequentially passes through the catheter channels in the multiple connection modules and is located in the medical channel in the connection module far from the distal end of the medical catheter. And the multiple working holes are in one-to-one correspondence and communication with the through holes located between the side wall and the catheter channel on the multiple connection modules.

[0027] In an alternative embodiment, the medical catheter is internally provided with a plurality of mutually isolated cavities. The tube body of the medical catheter located in the catheter channel is provided with a plurality of working holes spaced along its axial direction. The plurality of working holes are in one-to-one correspondence and communication with the plurality of cavities.

[0028] There is one connection module. Both ends of the catheter channel are provided with openings. The proximal end of the medical catheter can sequentially pass through the openings at both ends of the catheter channel and extend out of the connection module. The connection module is slidably connected to the medical catheter. The connection module can make the through hole between its side wall and the catheter channel communicate with any one of the working holes during the process of sliding relative to the medical catheter.

[0029] In an alternative embodiment, a balloon is provided outside the tube body of the medical catheter near its distal end. And at least one cavity in the medical catheter is a balloon cavity. The tube body of the medical catheter at the position of the balloon is provided with balloon holes. The balloon and the balloon cavity are communicated through the balloon holes.

[0030] In an alternative embodiment, there are two medical catheters. One medical catheter is an inner catheter and the other medical catheter is an outer catheter. The outer catheter is sleeved outside the inner catheter. And the proximal end of the inner catheter passes through the proximal end of the outer catheter and is exposed outside the outer catheter.

[0031] There are two handle assemblies. One handle assembly is a proximal handle and the other handle assembly is a distal handle. The proximal end of the outer catheter extends into the catheter channel in the distal handle. One end of the catheter channel in the distal handle far from the distal end of the outer catheter is provided with an opening, and this opening is a proximal opening. The proximal end of the inner catheter passes through the catheter channel in the distal handle and extends into the catheter channel in the proximal handle through the proximal opening. And a sealing arrangement is provided between the proximal opening and the outer wall of the inner catheter.

[0032] The handle assembly provided by the present invention includes a connection module having a catheter channel inside; at least one end of the catheter channel is provided with an opening, and at least a part of the inner wall of the catheter channel is provided with a sealing portion, and the sealing portion is used to fit and seal with an object extending into the catheter channel. The handle assembly provided by the present invention can be used in combination with medical catheters such as infusion tubes, drug delivery tubes, drainage tubes, and irrigation tubes to achieve operations such as liquid injection, gas injection, and suction. Among them, the connection module can be detachably connected to the medical catheter. Specifically, the opening is used for the medical catheter to pass through, and the catheter channel is used to accommodate the medical catheter. At this time, the medical catheter and the connection module are connected to each other by a plug-in method. Correspondingly, the object extending into the catheter channel at this time is the medical catheter. The two ends of the medical catheter are usually the proximal end and the distal end respectively. The distal end is used to extend into the patient's body, and the proximal end is used to connect to the handle to facilitate operations such as inserting, injecting liquid, injecting gas, or suction of the medical catheter. During the operation, an intervention catheter, an endoscope and other slender guiding channels can be first inserted into the patient's body, and the proximal end of the medical catheter is connected to the connection module in the handle assembly provided by the present invention, so that the medical catheter is connected to the handle assembly. Then, the distal end of the medical catheter and the tube body near the distal end are placed into the patient's body through the guiding channel, and then the patient can be surgically treated by using the medical catheter and the handle assembly. Since in the handle assembly provided by the present invention, the outer wall of the medical catheter can be hermetically fitted with the sealing portion on the inner wall of the catheter channel after the medical catheter extends into the catheter channel, the connection between the medical catheter and the connection module can be sealed after connection. That is, after the medical catheter and the handle assembly are assembled together, the sealing performance of the connection can be effectively guaranteed. At this time, medical operations such as liquid injection, gas injection, and suction can be normally performed by using the medical catheter and the handle assembly. After the surgical treatment, when the medical catheter needs to be left in the patient's body and the guiding channel is withdrawn from the patient's body, the proximal end of the medical catheter can be first withdrawn from the catheter channel of the connection module, so as to separate the medical catheter from the handle assembly. Since there is no obstruction of the handle assembly at the proximal end of the medical catheter, the guiding channel can be directly withdrawn while retaining the medical catheter. After the guiding channel is withdrawn, to ensure that the medical catheter can be used normally, the proximal end of the medical catheter can also be extended into the catheter channel in the connection module to reassemble the medical catheter and the handle assembly together.It can be seen that the connection module in the present invention enables the handle assembly to be used as an independent handle. It can not only ensure the sealing performance at the connection after assembling the medical catheter and the handle assembly, thus ensuring the normal use functions of the medical catheter and the handle assembly, but also facilitate the flexible disassembly and assembly of the handle assembly at the proximal end of the medical catheter according to the usage requirements. During the process of withdrawing the guiding channel from the patient's body, it is only necessary to directly withdraw the guiding channel from the patient's body after separating the medical catheter from the handle assembly, without first inserting a guide wire into the patient's body, nor withdrawing the medical catheter and the guiding channel together and then reinserting the medical catheter along the guide wire into the patient's body. This effectively simplifies the operation of withdrawing the guiding channel, optimizes the surgical procedure, not only can effectively improve the surgical efficiency, reduce the surgical cost and surgical time, but also can effectively reduce the surgical risk, thereby reducing the harm to the patient, bringing great benefits to both medical staff and patients.

[0033] Compared with the prior art, the handle assembly provided by the present invention can allow objects such as etc. to be inserted through the catheter channel and the opening of the connection module, realizing the detachable connection between the handle assembly and the medical catheter, and can ensure the sealing performance at the connection between the medical catheter and the handle assembly through the sealing part. Thus, when it is necessary to leave the medical catheter in the patient's body and withdraw the guiding channel after the operation, by first separating the medical catheter from the handle assembly, the guiding channel can be directly withdrawn. And after the guiding channel is withdrawn, reconnecting the medical catheter to the connection module can ensure the normal use of the medical catheter, without performing complex instrument exchange operations, effectively improving the operation convenience, surgical safety and surgical efficiency.

[0034] The medical catheter system provided by the present invention includes a medical catheter and the above-mentioned handle assembly. The medical catheter includes a proximal end and a distal end. The proximal end of the medical catheter extends into the catheter channel after passing through the opening of the catheter channel. Since this medical catheter system includes the above-mentioned handle assembly, this medical catheter system and the above-mentioned handle assembly can achieve the same beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 It is a schematic structural diagram of the connection module in the handle assembly provided in Embodiment 1 of the present invention;

[0037] Figure 2 It is a schematic structural diagram of the connection module, the communicating pipe and the joint in the handle assembly provided in Embodiment 1 of the present invention;

[0038] Figure 3 Cross-sectional view of the connection module and the local communication pipe provided in the first embodiment of the present invention;

[0039] Figure 4 Another cross-sectional view of the connection module and the local communication pipe provided in the first embodiment of the present invention;

[0040] Figure 5 Cross-sectional view of the local connection module when the sealing ring of the first embodiment of the present invention is not deformed;

[0041] Figure 6 Cross-sectional view of the local connection module when the sealing ring of the first embodiment of the present invention is deformed;

[0042] Figure 7 Another cross-sectional view of the local connection module when the sealing ring of the first embodiment of the present invention is not deformed;

[0043] Figure 8 Front view of the handle housing provided in the first embodiment of the present invention;

[0044] Figure 9 Cross-sectional view of the handle housing, connection module and joint provided in the first embodiment of the present invention;

[0045] Figure 10 Structural schematic diagram of the single-joint handle assembly provided in the first embodiment of the present invention;

[0046] Figure 11 Structural schematic diagram of the double-joint handle assembly provided in the first embodiment of the present invention;

[0047] Figure 12 For Figure 11 Cross-sectional view of the handle assembly in;

[0048] Figure 13 Another structural schematic diagram of the double-joint handle assembly provided in the first embodiment of the present invention;

[0049] Figure 14 Structural schematic diagram of the triple-joint handle assembly provided in the first embodiment of the present invention;

[0050] Figure 15 For Figure 14 Cross-sectional view of the handle assembly in;

[0051] Figure 16 Structural schematic diagram of the support frame provided in the first embodiment of the present invention;

[0052] Figure 17 Cross-sectional view of the support frame provided in the first embodiment of the present invention;

[0053] Figure 18 Another cross-sectional view of the support frame provided in the first embodiment of the present invention;

[0054] Figure 19 Another structural schematic diagram of the support frame provided in the first embodiment of the present invention;

[0055] Figure 20 Another structural schematic diagram of the support frame provided in the first embodiment of the present invention;

[0056] Figure 21 Structural schematic diagram of a single-joint handle assembly including a locking structure provided in the first embodiment of the present invention;

[0057] Figure 22 Structural schematic diagram of a double-joint handle assembly including a locking structure provided in the first embodiment of the present invention;

[0058] Figure 23 Cross-sectional view of the connection module when one end of the catheter channel provided in the first embodiment of the present invention has an opening and the other end is closed;

[0059] Figure 24 Structural schematic diagram of the connection module and the joint when both ends of the catheter channel provided in the first embodiment of the present invention have openings;

[0060] Figure 25 Structural schematic diagram of a medical catheter system including a single-joint handle assembly provided in the second embodiment of the present invention;

[0061] Figure 26 Structural schematic diagram of a medical catheter system including a double-joint handle assembly provided in the second embodiment of the present invention;

[0062] Figure 27 Structural schematic diagram of a medical catheter system including a triple-joint handle assembly provided in the second embodiment of the present invention;

[0063] Figure 28 Another structural schematic diagram of a medical catheter system including a single-joint handle assembly provided in the second embodiment of the present invention;

[0064] Figure 29 Partial structural schematic diagram of the inner catheter provided in the second embodiment of the present invention;

[0065] Figure 30 Partial structural schematic diagram of the outer catheter provided in the second embodiment of the present invention;

[0066] Figure 31 Structural schematic diagram of a medical catheter system including an inner catheter, an outer catheter, and two handle assemblies provided in the second embodiment of the present invention;

[0067] Figure 32Cross-sectional view of a medical catheter system including a single-joint handle assembly provided in the second embodiment of the present invention;

[0068] Figure 33 Cross-sectional view of a medical catheter system including a three-joint handle assembly provided in the second embodiment of the present invention;

[0069] Figure 34 Cross-sectional view of a medical catheter system including an inner catheter, an outer catheter, and two handle assemblies provided in the second embodiment of the present invention;

[0070] Figure 35 Another cross-sectional view of a medical catheter system including a three-joint handle assembly provided in the second embodiment of the present invention;

[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 the second embodiment of the present invention;

[0072] Figure 37 Cross-sectional view of a medical catheter system including a double-joint handle assembly provided in the second embodiment of the present invention.

[0073] Reference numerals: 1 - connection module; 10 - catheter channel; 11 - through hole; 12 - first end cap; 13 - sealing body; 14 - second end cap; 2 - joint; 20 - communication pipe; 3 - sealing ring; 4 - handle housing; 40 - receiving groove; 5 - limiting structure; 50 - limiting protrusion; 51 - limiting groove; 6 - support frame; 60 - clamping groove; 61 - support groove; 62 - support hole; 7 - locking structure; 8 - medical catheter; 80 - working hole; 81 - cavity; 82 - inner catheter; 83 - outer catheter; 84 - guide wire outlet; 85 - liquid injection outlet; 86 - seal; 9 - balloon; 90 - balloon hole. Detailed Description of the Specific Embodiment

[0074] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can 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 present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0076] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0077] Embodiment 1:

[0078] As Figure 1 and Figure 2 shown, the handle assembly provided in this embodiment includes a connection module 1 with a catheter channel 10 provided inside; as Figure 3 and Figure 4 shown, at least one end of the catheter channel 10 is provided with an opening, and at least a part of the inner wall of the catheter channel 10 is provided with a sealing portion, and the sealing portion is used to fit and seal with an object extending into the catheter 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 irrigation tubes to achieve operations such as liquid injection, gas injection, and suction. Among them, the connection module 1 can be detachably connected to the Figures 25 - 37 shown medical catheter 8. Specifically, the opening of the catheter channel 10 is used 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 and the connection module 1 are connected to each other by a plug-in method. Correspondingly, the object extending into the catheter channel 10 at this time is the medical catheter 8. It should be noted that the detachable connection between the connection module 1 and the medical catheter 8 includes two states: connecting first and then disconnecting, and disconnecting first and then connecting.

[0080] The two ends of the medical catheter 8 are usually the proximal end and the distal end respectively. The distal end is used to extend into the patient's body, and the proximal end is used to connect with the handle to facilitate operations such as inserting, injecting liquid, injecting gas, or suctioning the medical catheter 8. During the operation, an interventional catheter, an endoscope and other slender guiding channels can be inserted into the patient's body first, and the proximal end of the medical catheter 8 is communicated with the connection module 1 in the handle assembly provided in this embodiment, so that the medical catheter 8 is connected to the handle assembly. Then, the distal end of the medical catheter 8 and the tube body near the distal end are placed into the patient's body through the guiding channel, and then the patient can be surgically treated by using the medical catheter 8 and the handle assembly.

[0081] Since in the handle assembly provided in this embodiment, after the medical catheter 8 extends into the catheter channel 10 of the connection module 1, its outer wall can be hermetically fitted with the sealing portion on the inner wall of the catheter channel 10, the connection between the medical catheter 8 and the connection module 1 can be sealed after connection. That is, after the medical catheter 8 and the handle assembly are assembled together, the sealing performance of the connection can be effectively guaranteed. At this time, medical operations such as liquid injection, gas injection, and suction can be normally carried out by using the medical catheter 8 and the handle assembly.

[0082] After surgical treatment, when it is necessary to leave the medical catheter 8 in the patient's body and withdraw the guiding channel from the patient's body, the proximal end of the medical catheter 8 can be first withdrawn from the catheter channel 10 of the connection module 1, so as to separate the medical catheter 8 from the handle assembly. Since there is no obstruction of the handle assembly at the proximal end of the medical catheter 8, at this time, the guiding channel can be directly withdrawn while retaining the medical catheter 8.

[0083] Taking the endoscopic surgery of the digestive tract as an example, doctors often insert the medical catheter 8 into the digestive tract through the endoscopic forceps channel (i.e., the guiding channel) to perform surgical operations such as flushing, drainage, dilation, or drug administration on the digestive tract. However, when withdrawing the endoscopic forceps channel while retaining the medical catheter 8, since the size of the endoscopic forceps channel is much smaller than the handle at the proximal end of the medical catheter 8, the endoscopic forceps channel cannot be directly withdrawn. If the handle at the proximal end of the medical catheter 8 is the handle assembly in this embodiment, at this time, the handle assembly can be directly separated from the proximal end of the medical catheter 8, and then the endoscopic forceps channel can be withdrawn, so as to quickly complete the operations of withdrawing the endoscopic forceps channel and leaving the medical catheter 8.

[0084] It should be noted that after withdrawing the guiding channel such as the endoscopic forceps channel, to ensure that the medical catheter 8 can continue to be used normally, the proximal end of the medical catheter 8 can also be reinserted into the catheter channel 10 in the connection module 1 to reassemble the medical catheter 8 with the handle assembly again.

[0085] It can be seen that the connection module 1 in this embodiment enables the handle assembly to be used as an independent handle. It can not only ensure the sealing performance at the connection part after assembling the medical catheter 8 and the handle assembly, so as to ensure the normal use functions of the medical catheter 8 and the handle assembly, but also facilitate the flexible disassembly and assembly of the handle assembly at the proximal end of the medical catheter 8 according to the use requirements. During the process of withdrawing the guiding channel from the patient's body, only after separating the medical catheter 8 from the handle assembly, the guiding channel can be directly withdrawn from the patient's body, without first inserting a guide wire into the patient's body, nor withdrawing the medical catheter 8 and the guiding channel together and then reinserting the medical catheter 8 into the patient's body along the guide wire. Thus, the operation of withdrawing the guiding channel is effectively simplified, and the surgical procedure is optimized. It can not only effectively improve the surgical efficiency, reduce the surgical cost and operation time, but also effectively reduce the surgical risk, thereby reducing the harm to the patient, bringing great benefits to both medical staff and patients.

[0086] Compared with the prior art, the handle assembly provided in this embodiment can be inserted by objects such as through the catheter channel 10 and the opening of the connection module 1, realizing the detachable connection between the handle assembly and the medical catheter 8, and the sealing part can ensure the sealing performance at the connection between the medical catheter 8 and the handle assembly. Therefore, when the medical catheter 8 is left in the patient's body after the operation and the guiding channel is withdrawn, by first separating the medical catheter 8 from the handle assembly, the guiding channel can be directly withdrawn, and after the guiding channel is withdrawn, reconnecting the medical catheter 8 to the connection module 1 can ensure the normal use of the medical catheter 8 without performing complex instrument exchange operations, effectively improving the operation convenience, surgical safety and surgical efficiency.

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

[0088] It should be noted that the medical catheter 8 usually has a lumen 81 inside, and the lumen 81 is correspondingly communicated with the working hole 80. The working hole 80 is such as a liquid injection hole, a gas injection hole, a suction hole, etc. Corresponding to the function of the working hole 80, the lumen 81 inside the medical catheter 8 is usually used for operations such as liquid injection, gas injection, and suction.

[0089] The connector 2 in this embodiment is used to communicate with external instruments such as syringes, and the through hole 11 is used to realize the communication between the connector 2 and the catheter channel 10. When the medical catheter 8 extends into the catheter channel 10, the through hole 11 can also be correspondingly communicated with the working hole 80 on the medical catheter 8, so as to realize the communication between the working hole 80 of the medical catheter 8 and the external instrument through the connector 2.

[0090] In addition, as Figure 23 shown, when only one end of the catheter channel 10 in the connection module 1 is provided with an opening and the other end of the catheter channel 10 is closed, when the medical catheter 8 extends into the catheter channel 10, the proximal end of the medical catheter 8 can be automatically sealed, and operations such as liquid injection and gas injection of the medical catheter 8 can be carried out through the through hole 11 provided on the connection module 1 and the connector 2 communicated with the through hole 11. As Figure 3 and Figure 24As shown, when openings are provided at both ends of the catheter channel 10 in the connection module 1, 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 opening of the medical catheter 8 can also be used as the working hole 80.

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

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

[0093] When the internal cavity 81 of the medical catheter 8 is a multiple cavity, in order to enable the handle assembly to be applicable to the multiple cavities to ensure the multi-functional working process of the medical catheter 8, the connection module 1 also needs to be correspondingly set to multiple. In order to enable the multiple cavities of the medical catheter 8 to be connected to multiple external instruments in a one-to-one correspondence through multiple connection modules 1, in this embodiment, it is defined that the multiple working holes 80 on the medical catheter 8 are 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 in the connection module 1.

[0094] Based on this, distributing the multiple connection modules 1 sequentially along the extension direction of the medical catheter 8 can make the distribution direction of the multiple connection modules 1 the same as the distribution direction of the working holes 80, so that the through holes 11 on the multiple connection modules 1 can communicate with the multiple working holes 80 in a one-to-one correspondence, realizing the corresponding connection between the multiple connection modules 1 and the multiple cavities of the medical catheter 8. At this time, one end of each through hole 11 on each connection module 1 away from the catheter channel 10 can be connected to a connector 2, and the connector 2 is used to communicate with the external instrument corresponding to the working hole 80 docked with this connection module 1.

[0095] It can be seen that the number of connectors 2 is correspondingly set according to the number of internal cavities 81 of the medical catheter 8. For example, as Figure 10As shown, when there is one connector 2, the handle assembly is a single-connector handle assembly. Correspondingly, the single-connector handle assembly is adapted to a single-channel medical catheter. As Figure 11 , Figure 12 and Figure 13 shown, when there are two connectors 2, the handle assembly is a double-connector handle assembly. Correspondingly, the double-connector handle assembly is adapted to a double-channel medical catheter. As Figure 14 and Figure 15 shown, when there are three connectors 2, the handle assembly is a triple-connector handle assembly. Correspondingly, the triple-connector handle assembly is adapted to a triple-channel medical catheter.

[0096] In addition, in this embodiment, the catheter channels 10 between any two adjacent connection modules 1 are interconnected, which can ensure that the same medical catheter 8 can sequentially extend into the catheter channels 10 in multiple connection modules 1.

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

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

[0099] It should be noted that when there are multiple connection modules 1, as Figure 12 shown, only the catheter channel 10 in the connection module 1 close to the proximal end of the medical catheter 8 can have an opening at only one end, and the catheter channels 10 in the remaining connection modules 1 need to have openings at both ends so that the catheter channels 10 in two adjacent connection modules 1 can be interconnected.

[0100] In this embodiment, the sealing part is an annular part and there are two groups. The inner wall of the sealing part is used for hermetically fitting with the outer wall of the medical catheter 8 extending into the catheter channel 10, and the two groups of sealing parts form a sealed cavity in the catheter channel 10. The sealed 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 path with the medical catheter 8.

[0101] When the medical catheter 8 extends into the catheter channel 10, at least part of the working hole 80 on it enters the sealed cavity. At this time, the working hole 80 can communicate with the through hole 11 on the connection module 1 through the sealed cavity, so that the liquid or gas entering from the joint 2 can enter the working passage formed by the connection between the sealed cavity and the medical catheter 8. Among them, the inner diameter at the sealed cavity can be larger than the inner diameter of the medical catheter 8. At this time, the medical catheter 8 is inserted into the catheter channel 10, and the working hole 80 is located in the sealed cavity, so that the communication between the working hole 80 and the through hole 11 can be realized without adjusting the position of the medical catheter 8 to align the working hole 80 with the through hole 11, thus improving the convenience of use of the handle assembly.

[0102] Further, as Figure 5 and Figure 6 shown, 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 an opening is provided on the first end cap 12; the sealing part is a sealing ring 3 that can deform along its radial direction. The inner diameter of the sealing ring 3 is not greater than the inner diameter of the catheter channel 10, and a sealing ring 3 is abutted between the first end cap 12 and the sealing body 13; the first end cap 12 can move axially relative to the sealing body 13 to deform the sealing ring 3 between the first end cap 12 and the sealing body 13, and the first end cap 12 can remain fixed in position after moving relative to the sealing body 13.

[0103] Among them, the first end cap 12 is annular, and the inner space of the ring of the first end cap 12 and the hollow part of the sealing body 13 communicate with each other to jointly form the catheter channel 10.

[0104] The sealing part is a sealing ring 3 that can deform along its radial direction, which can make the sealing module 1 in this embodiment adapt to medical catheters 8 with different diameters, further expanding the applicable range of the handle assembly.

[0105] To ensure the sealing effect, the sealing part needs to be made of a sealing material.

[0106] To realize the radial deformation of the sealing part, the sealing part can adopt a silicone layer covering the inner wall of the catheter channel 10, or the sealing part can adopt a sealing ring 3. The sealing ring 3 can be one or more. When the sealing part adopts a plurality of sealing rings 3, the plurality of sealing rings 3 are distributed in sequence along the axial direction of the catheter channel 10.

[0107] During the process of the first end cap 12 moving axially relative to the sealing body 13, the closer the first end cap 12 is to the sealing body 13 (at this time, the first end cap 12 is along Figure 5 and Figure 6If it moves in the direction of the arrow shown, the greater the compression of the sealing ring 3 by the first end cap 12, and thus the smaller the inner diameter of the sealing ring 3, which can fit a medical catheter 8 with a smaller diameter; conversely, the larger the inner diameter of the sealing ring 3, which can fit a medical catheter 8 with a larger diameter.

[0108] It can be seen that when the connection module 1 includes the first end cap 12 and there is a sealing ring 3 abutted 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 connection module 1 can fit medical catheters 8 with different diameters.

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

[0110] Among them, the connection method between the first end cap 12 and the sealing body 13 is not limited, as long as the first end cap 12 can move relative to the sealing body 13 and remain fixed in position after moving. For example, as Figure 3 、 Figure 5 and Figure 6 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 shown, the first end cap 12 and the sealing body 13 are threadedly connected. 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 moving can be fixed by means of clamping, inserting pins or interference fit, etc.

[0111] In this embodiment, as Figure 3 、 Figure 5 and Figure 6 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 shown, the first end cap 12 and the sealing body 13 are threadedly connected.

[0112] Furthermore, as Figure 3 and Figure 4 shown, the connection module 1 can further include a second end cap 14, and the second end cap 14 is connected to the end of the sealing body 13 far from the first end cap 12; there is a sealing ring 3 abutted between the second end cap 14 and the sealing body 13, and the second end cap 14 can move 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 can remain fixed in position after moving relative to the sealing body 13.

[0113] Among them, the second end cap 14 is also annular. At this time, the inner space of the ring of the first end cap 12, the hollow part of the sealing body 13, and the inner space of the ring of the second end cap 14 communicate with each other to jointly form a catheter channel 10.

[0114] The connection module 1 further 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 stably support 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 provided with a working hole 80, so as to ensure the tightness of the space where the working hole 80 is located.

[0115] There is no limitation 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 moving. 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 threadedly connected. 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 moving can be fixed by means of clamping, inserting pins or interference fit.

[0116] When there are multiple connection modules 1, two adjacent connection modules 1 can be fixedly connected. Further, when the connection module 1 further includes a first end cap 12 and a second end cap 14, in order to achieve the fixed connection between two adjacent connection modules 1, among two adjacent connection modules 1, the mutually approaching first end cap 12 and second end cap 14 can be fixedly connected by means of integral molding, etc. At this time, assembling the first end cap 12 with the connection module 1 and assembling the second end cap 14 with the connection module 1 can sequentially achieve the sequential fixed connection of multiple connection modules 1, effectively improving the assembly efficiency of the handle assembly.

[0117] As Figure 8 and Figure 9 shown, the handle assembly provided in this embodiment may further include a handle housing 4. An accommodation groove 40 is provided in the handle housing 4, and the connection module 1 is arranged in the accommodation 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 body, thereby improving the overall structural integrity of the handle assembly.

[0119] Further, 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 connection 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 connection module 1. The limiting protrusion 50 extends into the limiting groove 51 to limit the axial movement of the connection module 1 along the handle housing 4.

[0120] When the connection module 1 is provided with a through hole 11, the limiting structure 5 can not only improve the position stability of the connection module 1 in the receiving groove 40 of the handle housing 4, but also effectively prevent the connection module 1 from rotating randomly in the receiving groove 40, which may affect 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.

[0121] To facilitate the assembly of the handle assembly, the handle housing 4 can be formed by docking two half shells, and the two half shells are detachably connected by fasteners such as screws or a snap-fit structure.

[0122] As Figures 10 - 20 shown, the handle assembly provided in this embodiment further includes a support frame 6, and the support frame 6 is provided on one side of the connection module 1; the joint 2 and the through hole 11 are connected by a communication pipe 20, and a card slot 60 is provided on the support frame 6, and the communication pipe 20 is snap-fitted in the card slot 60; and / or, both ends of the catheter channel 10 are provided with openings, and the two ends of the catheter channel 10 are used for the proximal end of the medical catheter 8 to pass through in sequence; a support groove 61 or a support hole 62 is provided on the support frame 6, 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 communication pipe 20 between the joint 2 and the connection module 1, so that the distribution of the communication pipe 20 is more orderly, thereby facilitating medical staff to identify the corresponding joint 2 of each connection module 1 and improving the convenience of use of the handle assembly.

[0124] Among them, the card slot 60 is used to realize the snap-fit between the support frame 6 and the communication pipe 20, thereby improving the convenience of installation and removal of the communication 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] As Figure 16 、 Figure 19 and Figure 20 shown, the support frame 6 can include one or more support rods, and at least one card slot 60 is provided on each support rod. When the support frame 6 includes one support rod, one end of the support rod is connected to the handle housing 4; as Figures 16 - 18As shown, when the support frame 6 includes a plurality of support rods, one ends of the plurality of support rods are connected to one point, and a plug rod perpendicular to the support rods may be provided at this point, and the plug rod is connected to the handle housing 4.

[0127] Wherein, the plug rod and the handle housing 4 can be inserted 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 according to the usage requirements to clamp different connectors 2.

[0128] In addition, the orientation of the card slot 60 is not limited. For example, Figure 16 and Figure 20 as shown, when the card slot 60 is provided at one end of the support rod, the opening of the card slot 60 can face away from the other end of the support rod; as Figure 19 shown, when the card slot 60 is provided on one side of the support rod, the opening of the card slot 60 can face away from the other side of the support rod.

[0129] To improve the stability of the medical catheter 8 in the catheter channel 10, in this embodiment, it is preferred that both ends of the catheter channel 10 are provided with openings, and as Figure 17 and Figure 18 shown, at this time, a support groove 61 or a support hole 62 is provided on the support frame 6. 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, and can also support the medical catheter 8 to improve the stability of the medical catheter 8.

[0130] It should be noted that the selection of the support groove 61 and the support hole 62 needs to be determined according to whether the proximal end of the medical catheter 8 is used as the working hole 80. Specifically, when the proximal end of the medical catheter 8 does not need to be used as the working hole 80, in order to close the proximal end of the medical catheter 8, as Figure 17 shown, a support groove 61 for accommodating the proximal end of the medical catheter 8 may be provided on the support frame 6, and after the proximal end of the medical catheter 8 extends into the support groove 61, it abuts against the inner wall of the support groove 61. When the proximal end of the medical catheter 8 is used as the working hole 80, that is, when the proximal end of the medical catheter 8 needs to be connected to the connector 2 through the connecting pipe 20, as Figure 15 and Figure 18 shown, a support hole 62 for the proximal end of the medical catheter 8 to pass through needs to be provided on the support frame 6.

[0131] As Figure 21 and Figure 22 shown, a locking structure 7 may be movably connected to the handle housing 4. The locking structure 7 includes a locking portion, and the locking portion is located in the catheter channel 10. The locking structure is used to move on the handle housing 4 to drive the locking portion to move so as to fix the medical catheter 8 in the catheter channel 10 in the catheter channel 10. Among them, the locking structure 7 may adopt an existing cock structure.

[0132] Embodiment 2:

[0133] As Figures 25 - 37 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 extends into the catheter channel 10 after passing through the opening of the catheter channel 10.

[0134] Among them, the medical catheter 8 is such as a drainage tube, an injection tube, a nutrition tube, a dilation catheter, a lithotripsy catheter, a plugging catheter, a urinary catheter, a central venous catheter, a blood vessel / nerve penetrating catheter, etc.

[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 all the beneficial effects of the handle assembly in the first embodiment above, which will not be elaborated here.

[0136] In this embodiment, a lumen 81 or multiple lumens 81 may also be provided inside the medical catheter 8.

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

[0138] The single-lumen medical catheter 8 can be used as a nasoenteric nutrition tube or a nasobiliary drainage tube. Specifically, in the placement operation of the nasoenteric nutrition tube, the single-lumen nasoenteric nutrition tube can be placed through the endoscopic forceps channel pre-retained in the patient's body, and then the endoscopic forceps channel is withdrawn, and then the handle assembly is installed at the proximal end of the nasoenteric nutrition tube. After the placement operation, feeding and drug administration can be continuously carried out into the intestine through the handle assembly and the medical catheter 8.

[0139] In endoscopic retrograde cholangiopancreatography (i.e., 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 used as a nasobiliary drainage tube, and then the bile duct can be aspirated under negative pressure by connecting the handle assembly with external instruments, thereby improving the drainage efficiency and effect.

[0140] In this embodiment, as Figure 33As shown, the interior of the medical catheter 8 may further be provided with a plurality of mutually isolated channels 81. At this time, a plurality of working holes 80 are provided on the tube body of the medical catheter 8 located in the catheter channel 10 and are distributed at intervals along its axial direction. The plurality of working holes 80 communicate with the plurality of channels 81 in a one-to-one correspondence. Correspondingly, there are a plurality of connection modules 1. The proximal end of the medical catheter 8 sequentially passes through the catheter channels 10 in the plurality of connection modules 1 and then is located in the medical channel in the connection module 1 far from the distal end of the medical catheter 8. Moreover, the plurality of working holes 80 communicate with the through holes 11 on the plurality of connection modules 1 located between their side walls and the catheter channels 10 in a one-to-one correspondence.

[0141] Further, as Figure 26 and Figure 27 shown, at this time, a plurality of connectors 2 can also be adopted. The plurality of connectors 2 communicate with the through holes 11 on the plurality of connection modules 1 in a one-to-one correspondence. Among them, the connector 2 and the through hole 11 can be communicated through a connecting pipe 20.

[0142] The multi-channel medical catheter 8 can also be used as a nasoenteral nutrition tube or a nasobiliary drainage tube. Specifically, for the nasoenteral nutrition tube, if a medical catheter system composed of the three-channel medical catheter and the three-connector handle assembly shown in Figure 33 and Figure 27 is adopted during the operation, then during the use process, operations such as flushing, nutrition, and decompression can be simultaneously performed on the intestine through the three channels 81. The above three channels 81 can be independent and sealed from each other through the three-connector handle assembly, which can avoid cross-contamination and mutual influence, and improve the surgical effect and efficiency.

[0143] For the nasobiliary drainage tube, if a single-channel drainage tube is used, it is impossible to perform flushing and drainage operations simultaneously, which easily leads to high pressure in the bile duct and pancreatic duct, causing a serious risk of complications. However, if a medical catheter system composed of the double-channel medical catheter and the double-connector handle assembly shown in Figure 26 is adopted, then during the use process, the bile duct can be flushed and drained simultaneously through the double channels, thereby increasing the effect of bile duct drainage and stone cleaning.

[0144] The medical catheter system provided in this embodiment can also adopt such as Figure 28The combined form of the multi-channel medical catheter and the single-connector handle assembly shown. Specifically, at this time, multiple mutually isolated channels 81 are provided inside the medical catheter 8. Multiple working holes 80 are provided at intervals along the axial direction on the tube body of the medical catheter 8 located inside the catheter channel 10. The multiple working holes 80 are in one-to-one correspondence and communication with the multiple channels 81; there is one connection module 1, and openings are provided at both ends of the catheter channel 10. The proximal end of the medical catheter 8 can extend outside the connection module 1 after passing through the openings at both ends of the catheter channel 10 in sequence; the connection module 1 is slidably connected to the medical catheter 8, and the through hole 11 between its side wall and the catheter channel 10 can be communicated with any one of the working holes 80 during the process of sliding relative to the medical catheter 8.

[0145] During the process of the connection module 1 sliding relative to the medical catheter 8, when the through hole 11 on it is sequentially communicated with the multiple working holes 80 on the medical catheter 8, the handle assembly can be communicated and sealed with different channels 81, so as to facilitate performing different surgical operations in sequence using different channels 81. For example, when the medical catheter 8 is a three-channel nutrition tube, three working holes 80 are provided on the medical catheter 8. When the connection module 1 is moved to different working holes 80, the handle assembly can be respectively communicated with the three channels 81, so that different surgical operations such as flushing, supplying nutrition, and decompression can be performed respectively.

[0146] It can be seen that when multiple mutually isolated channels 81 are provided inside the medical catheter 8 and the connection module 1 is slidably connected to the medical catheter 8, a handle assembly can be used to cooperate with the medical catheter 8 having multiple channels 81 inside to perform multiple surgical operations in sequence, effectively improving the adaptability of the handle assembly and the convenience of surgical operations.

[0147] As Figures 25 - 31 、 Figures 34 - 37 As shown, a balloon 9 can be provided outside the tube body of the medical catheter 8 near its distal end, and at least one of the channels 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 at the position of the balloon 9. The balloon 9 and the balloon cavity are communicated through the balloon hole 90.

[0148] The balloon 9 is used to achieve the positioning of the medical catheter 8 in the patient's body after being filled and inflated. At this time, among the multiple working holes 80 near the proximal end position of the medical catheter 8, one of the working holes 80 is a filling hole, and the filling hole is communicated with the balloon cavity.

[0149] When using the medical catheter 8, the distal end and the balloon 9 of the medical catheter 8 can be first inserted into the patient's body, and then one of the connection modules 1 in the handle assembly is connected to the medical catheter 8, so that the filling hole communicates with the through hole 11 on the connection module 1. Then, gas or liquid can be filled into the balloon cavity through the connector 2 communicated at the through hole 11, so that the balloon 9 is filled and inflated to abut against the inner wall of the intestinal tract or other channels in the patient's body, achieving the positioning purpose.

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

[0151] In practical applications, for a nasobiliary drainage tube, if the Figure 27 and Figure 35 medical catheter system composed of the balloon 9, the three-channel medical catheter and the three-connector handle assembly shown is used during the operation, then during the operation, the balloon 9 can be first filled and inflated through one of the channels 81 to block the distal end of the bile duct to prevent the medical catheter 8 from falling off from the bile duct, and then the remaining two channels 81 can be used for flushing and drainage, further reducing the surgical risk.

[0152] In addition, for endoscopic ultrasound-guided gastrojejunostomy (EUS-GE), during the operation, the doctor will place a nasobiliary tube in the jejunum to inject liquid and inflate the target jejunal segment to be anastomosed, so as to assist in puncturing and anastomosing the target intestinal lumen under ultrasound. However, the existing nasobiliary tubes are all single-channel medical catheters and the medical catheter and the handle are not detachable. Therefore, when placing the nasobiliary tube, a guide wire needs to be first placed in the endoscope placed in the patient's body, then the endoscope is exchanged and withdrawn from the human body, then the nasobiliary tube is inserted along the guide wire, and finally the guide wire is withdrawn. Moreover, the liquid injected through the existing nasobiliary tube will flow along the intestinal tract, resulting in the inability of the target intestinal lumen to be filled and inflated while a lot of liquid flows into other intestinal lumens, affecting the accuracy of the ultrasound image.

[0153] If the medical catheter system formed by combining the three-channel medical catheter and the three-connector handle assembly shown in Figure 27 and Figure 35 this embodiment is used for the above-mentioned gastrojejunostomy, the above problems can be solved. Specifically, the three channels 81 in the medical catheter 8 are respectively used as the balloon cavity, the liquid injection cavity and the guide wire cavity. When in use, the doctor can use the endoscope placed in the patient's body as a guiding channel to insert the medical catheter 8 into the patient's body, then disassemble the handle assembly, directly withdraw the endoscope, and then, without withdrawing the guide wire, expand the balloon 9 to block the distal end of the target intestinal lumen, and then inject liquid through the liquid injection cavity. At this time, the liquid cannot flow to the distal intestinal tract, and the target intestinal lumen can be filled and inflated to meet the expected requirements of the operation.

[0154] In this embodiment, there can be two medical catheters 8. At this time, asFigure 29 , Figure 30 , Figure 31 , Figure 34 and Figure 36 As shown in Figure 34 and Figure 36 , one of the medical catheters 8 is an inner catheter 82, and the other medical catheter 8 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; correspondingly, there are two handle assemblies, one of the handle assemblies is a proximal handle, and the other handle assembly is a distal handle; the proximal end of the outer catheter 83 extends into the catheter channel 10 in the distal handle, and an opening is provided at one end of the catheter channel 10 in the distal handle away from the distal end of the outer catheter 83, and this opening 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, and a sealing arrangement is provided between the proximal opening and the outer wall of the inner catheter 82.

[0155] This setting makes the medical catheter system composed of a double medical catheter and two handle assemblies, so that the medical catheter system has more functions.

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

[0157] For a nasoenteral feeding tube, at this time, the medical catheter system composed of a proximal balloon, a double medical catheter and two handle assemblies as shown in Figure 34 can be used for the operation. Then, during use, the inflated proximal balloon can be used to block the lumen of the proximal part of the digestive tract, and then operations such as drug administration, nutrition supply, and irrigation can be carried out respectively through the lumen 81 in the inner catheter 82 and the lumen 81 in the outer catheter 83. Since the lumen of the proximal part of the digestive tract is blocked by the proximal balloon, substances such as food, drugs, and irrigation fluid injected during the above operations can only move towards the distal end (anus side) of the digestive tract, thus avoiding the backflow of substances towards the oral side.

[0158] For a nasobiliary duct in EUS-GE surgery, at this time, the one shown in Figure 31 and Figure 36During the operation with the medical catheter system shown, which consists of a proximal balloon, a distal balloon, a double medical catheter, and a double handle assembly, during use, the inflated proximal balloon and distal balloon can cooperate with each other to block both ends of the target intestinal lumen. Then, substances such as liquid can be injected into the blocked intestinal lumen through the lumen 81 in the inner catheter 82. Since both ends of the intestinal lumen are blocked, the substances can only be retained between the proximal balloon and the distal balloon, thus improving the filling efficiency and effect.

[0159] As Figure 37 shown, when there are two lumens 81 inside the medical catheter 8 in the medical catheter system provided in this embodiment, the handle assembly is a double-joint handle assembly, and there is a balloon 9 at the tube body of the medical catheter 8 near the distal end, one of the two lumens 81 inside the medical catheter 8 can be used as a balloon lumen for inflating the balloon 9, and the other as an injection lumen; at this time, there can be two outlets on the medical catheter 8 that are axially spaced apart and both communicate with the injection lumen. Both outlets are located on the side of the balloon 9 near the proximal end of the medical catheter 8. Among the two outlets, the outlet closer to the balloon 9 is the guide wire outlet 84, and the outlet farther from the balloon 9 is the injection outlet 85. A seal 86 is provided at the position between the guide wire outlet 84 and the injection outlet 85 in the injection lumen. The seal 86 is used to isolate the guide wire outlet 84 and the injection outlet 85.

[0160] During use, the guide wire can be inserted into the injection lumen from the distal orifice of the medical catheter 8 and then extended through the guide wire outlet 84; when injecting liquid, the liquid can be injected into the injection lumen through the working hole 80 near the proximal end of the medical catheter 8, and then the liquid shoots out from the injection outlet 85. It should be noted that since there is a seal 86 between the guide wire outlet 84 and the injection outlet 85, the guide wire and the liquid will not interfere with each other.

[0161] It can be seen that this setting method can not only improve the operability of the guide wire, but also make the guide wire and the liquid injection process share a lumen 81. Thus, without changing the outer diameter of the medical catheter 8, the aperture of the injection lumen can be increased, the injection efficiency can be improved, and further the surgical efficiency can be improved, reducing the operation burden of medical staff.

[0162] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A handle assembly, characterized in that: It comprises a connection module (1) having a conduit channel (10) inside; At least one end of the conduit channel (10) is provided with an opening, and at least part of the inner wall of the conduit channel (10) is provided with a sealing portion, and the sealing portion is used to fit and seal with an object extending into the conduit channel (10).

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

3. The handle assembly according to claim 2, characterized in that: There are a plurality of connection modules (1), the plurality of connection modules (1) are sequentially distributed along the extension direction of the medical catheter (8), and the catheter channels (10) between any two adjacent connection modules (1) are interconnected; The catheter channels (10) in the plurality of connection modules (1) are used to accommodate the same medical catheter (8), and the through holes (11) on the plurality of connection modules (1) are used to communicate with the plurality of working holes (80) distributed at intervals on the medical catheter (8) in a one-to-one correspondence.

4. The handle assembly according to any one of claims 1 to 3, characterized in that: The sealing part is an annular part and is provided with two groups. The inner wall of the sealing part is used to seal with the outer wall of the medical catheter (8) inserted into the catheter channel (10), and the two groups of the 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) is inserted into the catheter channel (10), so as to form a working passage between the medical catheter (8) and the sealing part.

5. The handle assembly according to claim 4, characterized in that: The connection module (1) comprises a first end cover (12) and a hollow sealing body (13), wherein the first end cover (12) is connected to one end of the sealing body (13), and the opening is provided on the first end cover (12); The sealing portion is a sealing ring (3) that can be deformed in its radial direction, 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) is in contact between the first end cover (12) and the sealing body (13); The first end cover (12) can move relative to the sealing body (13) along its axial direction to deform the sealing ring (3) between the first end cover (12) and the sealing body (13), and the first end cover (12) can maintain a fixed position after moving relative to the sealing body (13).

6. The handle assembly according to claim 5, characterized in that: The connection module (1) further comprises a second end cover (14), wherein the second end cover (14) is connected to an end of the sealing body (13) away from the first end cover (12); The sealing ring (3) is in contact between the second end cover (14) and the sealing body (13); the second end cover (14) can move relative to the sealing body (13) along its axial direction so as to deform the sealing ring (3) between the second end cover (14) and the sealing body (13); and the second end cover (14) can 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 cover (12) and the sealing body (13) are connected by sliding along the axial direction of the first end cover (12), or the first end cover (12) and the sealing body (13) are connected by threads.

8. The handle assembly according to claim 2 or 3, characterized in that: It also comprises a support frame (6), wherein the support frame (6) is arranged on one side of the connection module (1); The joint (2) and the through hole (11) are connected via a connecting pipe (20), a slot (60) is provided on the support frame (6), and the connecting pipe (20) is connected to 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 to allow 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 to allow 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 to 3, characterized in that: It also comprises a handle shell (4), wherein a receiving groove (40) is provided in the handle shell (4), and the connection module (1) is arranged in the receiving groove (40).

10. A medical catheter system, characterized in that: It comprises a medical catheter (8) and a handle assembly according to any one of claims 1 to 9, wherein the medical catheter (8) comprises a proximal end and a distal end, and the proximal end of the medical catheter (8) passes through the opening of the catheter channel (10) and then extends into the catheter channel (10).

11. The medical catheter system according to claim 10, characterized in that: A cavity (81) is provided inside the medical catheter (8), and a working hole (80) communicating with the cavity (81) is provided on the tube body of the medical catheter (8) located in the catheter channel (10); There is one connection module (1), and a through hole (11) between the side wall of the connection module (1) and the conduit channel (10) is in communication with the working hole (80).

12. The medical catheter system according to claim 10, characterized in that: The medical catheter (8) is provided with a plurality of mutually isolated cavities (81) inside, and a tube body of the medical catheter (8) located in the catheter channel (10) is provided with a plurality of working holes (80) spaced apart along its axial direction, and the plurality of working holes (80) are connected to the plurality of cavities (81) in a one-to-one correspondence; There are a plurality of connection modules (1), the proximal end of the medical catheter (8) sequentially passes through the catheter channels (10) in the plurality of connection modules (1) and is located in the medical channel in the connection module (1) away from the distal end of the medical catheter (8), and the plurality of working holes (80) are connected in a one-to-one correspondence with the through holes (11) on the plurality of connection modules (1) located between the side walls thereof and the catheter channels (10).

13. The medical catheter system according to claim 10, characterized in that: The medical catheter (8) is provided with a plurality of mutually isolated cavities (81) inside, and a tube body of the medical catheter (8) located in the catheter channel (10) is provided with a plurality of working holes (80) spaced apart along its axial direction, and the plurality of working holes (80) are connected to the plurality of cavities (81) in a one-to-one correspondence; The connecting module (1) is a single one, and both ends of the catheter channel (10) are provided with openings, so that the proximal end of the medical catheter (8) can sequentially pass through the openings at both ends of the catheter channel (10) and then extend out of the connecting module (1); the connecting module (1) is slidably connected to the medical catheter (8), and the connecting module (1) can, in the process of sliding relative to the medical catheter (8), connect the through hole (11) between its side wall and the catheter channel (10) with any of the working holes (80).

14. The medical catheter system according to claim 12, characterized in that: A balloon (9) is provided outside the tube body of the medical catheter (8) near its distal end, 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).

15. The medical catheter system according to any one of claims 11 to 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); 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, and the end of the catheter channel (10) in the distal handle away from the distal end of the outer catheter (83) is provided with an opening, which is the proximal opening; the proximal end of the inner catheter (82) passes through the catheter channel (10) in the distal handle and then extends into the catheter channel (10) in the proximal handle through the proximal opening, and a seal is provided between the proximal opening and the outer wall of the inner catheter (82).

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