Pusher for partially-covered or fully-covered biliary tract metal stent

Abstract

The utility model discloses a pusher for a partially-covered or fully-covered biliary tract metal stent. The pusher comprises a pusher operating handle, the outer sheath tube is connected with the pusher operating handle, and the inner part of the outer sheath tube is hollow to form a channel; a conical head part is arranged at one end, far away from the pusher operating handle, of the outer sheath tube, the pusher operating handle is connected with an inner tube, and one end, far away from the pusher operating handle, of the inner tube is connected with the conical head part; the driving end of the pusher operating handle drives the inner tube to move in the axial direction of the outer sheath tube so as to drive the conical head part at the front end to move; a metal stent is arranged on the outer ring of the inner tube, and the metal stent is a partially-covered biliary tract metal stent or a fully-covered biliary tract metal stent; the driving end of the pusher operating handle drives the inner tube to move in the axial direction of the outer sheath tube so as to drive the metal support to move towards the outside or the inside of the outer sheath tube. According to the pusher, the operation process is simplified, the operation time is shortened, the operation success rate is improved, and complications are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bile duct puncture and drainage under ultrasound inner diameter guidance, in particular to a pusher for a partially or fully covered bile duct metal stent. Background Art

[0002] Ultrasound-guided bile duct drainage (EUS-BD) has been widely used in patients with malignant biliary obstruction who have failed conventional ERCP, have undergone gastrointestinal diversion, or have difficulty reaching the duodenal papilla due to gastrointestinal obstruction. During EUS-BD, especially transhepatic transgastric bile duct puncture and drainage (EUS-HGS), after successful bile duct puncture and successful guidewire placement, stent placement requires adequate dilation of the puncture channel and stomach wall due to the thick stomach wall and narrow puncture channel.

[0003] There are two methods for inserting metal stents in the prior art: cold expansion and hot expansion.

[0004] Cold dilation is to dilate the puncture channel with dilation bougies from thin to thick along the indwelling guide wire until the metal stent pusher can pass through smoothly, or to dilate the puncture channel with a cylindrical air balloon until the metal stent pusher can pass through smoothly.

[0005] Thermal dilation is the process of using a cystotomy knife to electrocute and dilate the puncture channel to a sufficiently large diameter along the indwelling guide wire.

[0006] However, both methods require the exchange and passage of multiple accessories along the guidewire, which can lead to prolonged operation time, bile leakage, guidewire displacement or even slippage, resulting in operation failure and serious complications.

[0007] Therefore, based on the above technical problems, technicians in this field urgently need to develop a pusher for a partially covered or fully covered biliary metal stent. Utility Model Content

[0008] The purpose of the utility model is to provide a pusher for a partially covered or fully covered biliary metal stent. The cone head at the end of the pusher has a channel inside, which can pass the metal head of the guide wire. In this way, the electrosurgical expansion device and the metal stent implantation device are integrated together, so that the expansion step and the stent implantation step are simplified into one step, simplifying the operation process, shortening the operation time, improving the success rate of the operation, and reducing the occurrence of complications.

[0009] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0010] The utility model provides a pusher for a partially covered or fully covered biliary metal stent, the pusher comprising:

[0011] Pusher operating handle; and

[0012] An outer sheath tube connected to the pusher operating handle, wherein the inner portion of the outer sheath tube is hollow to form a channel;

[0013] The outer sheath is provided with a cone head at one end away from the pusher operating handle, and the pusher operating handle is connected to an inner tube, and the inner tube is connected to the cone head at one end away from the pusher operating handle;

[0014] The driving end of the pusher operating handle drives the outer sheath tube and the inner tube to move relative to each other;

[0015] The outer ring of the inner tube is provided with a metal stent, and the metal stent is a partially covered biliary metal stent or a fully covered biliary metal stent;

[0016] The driving end of the pusher operating handle drives the outer sheath tube to move along the axial direction of the inner tube to drive the metal stent to move toward the outside or inside of the outer sheath tube.

[0017] Furthermore, the pusher operating handle includes a mounting end and an operating end;

[0018] The mounting end is fixedly connected to the outer sheath tube, and a transition tube is provided between the mounting end and the operating end;

[0019] The inner tube passes through the installation end and the transition tube and is connected to the driving component of the operating end.

[0020] Furthermore, the cone head is configured as a frustum structure with a diameter gradually decreasing from one end close to the outer sheath tube to one end away from the outer sheath tube.

[0021] Furthermore, the outer sheath is a plastic sheath;

[0022] The outer diameter of the inner tube is smaller than the inner diameter of the outer sheath tube;

[0023] The compressed size of the metal stent is smaller than the inner diameter of the outer sheath;

[0024] The metal bracket is arranged at one end of the inner tube close to the cone head.

[0025] Furthermore, an injection channel communicating with the outer sheath is formed inside the mounting end;

[0026] The mounting end has a syringe connecting port, and the syringe connecting port is communicated with the injection channel so as to inject contrast medium into the outer sheath tube through the syringe.

[0027] In the above technical solution, the utility model provides a pusher for a partially or fully covered biliary metal stent, which has the following beneficial effects:

[0028] The cone head of the pusher of the utility model has a channel inside, which can pass the metal head of the guide wire, thereby integrating the electrosurgical expansion device and the metal stent implantation device together, simplifying the expansion step and the stent implantation step into one step, simplifying the operation process, shortening the operation time, improving the operation success rate, and reducing the occurrence of complications. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0030] Figure 1 This is a schematic structural diagram of a pusher for a partially or fully covered biliary metal stent disclosed in an embodiment of the present application;

[0031] Figure 2 This is a schematic structural diagram of a partially covered or fully covered biliary metal stent pusher disclosed in an embodiment of the present application in a metal stent implantation state;

[0032] Figure 3 This is an enlarged structural diagram of a pusher for a partially covered or fully covered biliary metal stent disclosed in an embodiment of the present application.

[0033] Description of reference numerals:

[0034] 1. Pusher operating handle; 3. Metal bracket; 4. Cone head;

[0035] 101, installation end; 102, operation end; 103, transition tube; 104, injection channel; 105, two interfaces of the syringe;

[0036] 201, outer sheath; 202, inner tube; 203, metal ring;

[0037] 401. Cone head wire. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] See also Figures 1 to 3 As shown;

[0040] This embodiment discloses a pusher for a partially or fully covered biliary metal stent, the pusher comprising:

[0041] Pusher operating handle 1; and

[0042] An outer sheath tube 201 connected to the pusher operating handle 1, wherein the inner portion of the outer sheath tube 201 is hollow to form a passage;

[0043] The outer sheath 201 is provided with a cone head 4 at one end away from the pusher operating handle 1, and the pusher operating handle 1 is connected to the inner tube 202, and the inner tube 202 is connected to the cone head 4 at one end away from the pusher operating handle 1;

[0044] The driving end of the pusher operating handle 1 drives the outer sheath tube 201 and the inner tube 202 to move relative to each other;

[0045] The outer ring of the inner tube 202 is provided with a metal stent 3, which is a partially covered biliary metal stent or a fully covered biliary metal stent;

[0046] The driving end of the pusher operating handle 1 drives the outer sheath tube 201 to move along the axial direction of the inner tube 202 to drive the metal stent 3 to move toward the outside or inside of the outer sheath tube 201 .

[0047] Specifically, this embodiment discloses a partially covered or fully covered biliary metal stent pusher with electrocuting and expansion function, the pusher structure combines the electrocuting and expansion function with the metal stent placement function, the pusher includes a pusher operating handle 1 and an outer sheath tube 201 connected thereto; the outer sheath tube 201 is provided with an inner tube 202 or an outer sheath tube 201 connected to the driving structure of the pusher operating handle 1, and the other end of the outer sheath tube 201 is provided with a cone head 4, which is connected to the inner tube 202, so as to be driven by the driving structure of the pusher operating handle 1 to move axially along the outer sheath tube 201 or drive the outer sheath tube 201 to move.

[0048] This application can drive the inner tube 202 to move, or it can drive the outer sheath 201 to move after changing the connection structure, both of which can meet the design requirements for the entry and exit of the metal stent 3. The following explanation and description only uses the driving of the inner tube 202 as a specific embodiment.

[0049] As an expanded implementation method, the inner tube 202 of this embodiment can be designed as a hollow structure to pass through the hollow structure as a channel, allowing the channel to serve as a passage space for the internal guide wire, and the guide wire involved in this embodiment mainly serves to guide the insertion of the pusher; and one end of the cone head wire 401 is connected to the cone head 4, and the other end of the cone head wire 401 is connected to the power supply, so that after power is turned on, the cone head 4 of this embodiment can perform an electric cutting and expansion operation. At the same time, it should be noted that the cone head wire 401 of this embodiment can adopt a structure that is placed inside the inner tube 202, that is, a channel for wiring is set in the inner wall of the inner tube 202, and the cone head wire 401 is arranged in the wiring channel, so that one end is connected to the unit interface of the power supply, and the other end is connected to the cone head 4 of this embodiment.

[0050] As the main component of this embodiment, the pusher has the following specific structure: the pusher operating handle 1 of this embodiment includes a mounting end 101 and an operating end 102;

[0051] The mounting end 101 is fixedly connected to the outer sheath 201 , and a transition tube 103 is provided between the mounting end 101 and the operating end 102 ;

[0052] The inner tube 202 passes through the installation end 101 and the transition tube 103 and is connected to the driving component of the operating end 102 .

[0053] First, this embodiment makes some changes to the structure of the existing pusher, namely, the pusher includes a mounting end 101, an operating end 102, and a transition tube 103; the mounting end 101 is connected to the outer sheath tube 201, and the operating end 102 is a structure that drives the inner tube 202 to move. There are many types of structures of the operating end 102, all of which are well-known technologies. They can be manually operated or electrically operated, and will not be described in detail here. The transition tube 103 is a structure that connects the mounting end 101 and the operating end 102.

[0054] Among them, in order to assist the placement of the metal stent 3 and the expansion of the electric incision, the front end of the pusher of this embodiment is a cone head 4, which is configured as a frustum structure with a diameter gradually decreasing from the end close to the outer sheath 201 to the end away from the outer sheath 201.

[0055] Preferably, the outer sheath 201 of this embodiment is a plastic sheath; the outer diameter of the inner tube 202 is smaller than the inner diameter of the outer sheath 201; the compressed size of the metal bracket 3 is smaller than the inner diameter of the outer sheath 201; the metal bracket 3 is arranged at one end of the inner tube 202 close to the cone head 4.

[0056] Preferably, an injection channel 104 connected to the outer sheath 201 is formed inside the mounting end 101 of this embodiment; at the same time, in order to facilitate the injection of contrast agent into the outer sheath 201, the mounting end 101 of this embodiment has a syringe connecting port 105, which is connected to the injection channel 104 to inject contrast agent into the outer sheath 201 through the syringe.

[0057] In the above technical solution, the utility model provides a pusher for a partially or fully covered biliary metal stent, which has the following beneficial effects:

[0058] The cone head portion 4 of the pusher of the present invention has a channel inside, which can pass the metal head of the guide wire, thereby integrating the electrosurgical expansion device with the metal stent implantation device, simplifying the expansion step and the stent implantation step into one step, simplifying the operation process, shortening the operation time, improving the success rate of the operation, and reducing the occurrence of complications.

[0059] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A pusher for a partially or fully covered biliary metal stent, characterized in that: The pusher includes: a pusher operating handle (1); and An outer sheath tube (201) connected to the pusher operating handle (1), wherein the inner portion of the outer sheath tube (201) is hollow to form a channel; The outer sheath tube (201) is provided with a cone head (4) at one end away from the pusher operating handle (1), and the pusher operating handle (1) is connected to an inner tube (202), and the inner tube (202) is connected to the cone head (4) at one end away from the pusher operating handle (1); The driving end of the pusher operating handle (1) drives the outer sheath tube (201) and the inner tube (202) to move relative to each other; The outer ring of the inner tube (202) is provided with a metal stent (3), and the metal stent (3) is a partially covered biliary metal stent or a fully covered biliary metal stent; The driving end of the pusher operating handle (1) drives the outer sheath tube (201) to move along the axial direction of the inner tube (202) to drive the metal bracket (3) to move toward the outside or inside of the outer sheath tube (201).

2. A pusher for a partially covered or fully covered biliary metal stent according to claim 1, characterized in that: The pusher operating handle (1) comprises a mounting end (101) and an operating end (102); The mounting end (101) is fixedly connected to the outer sheath tube (201), and a transition tube (103) is provided between the mounting end (101) and the operating end (102); The inner tube (202) passes through the installation end (101) and the transition tube (103) and is connected to the driving component of the operating end (102).

3. A pusher for a partially covered or fully covered biliary metal stent according to claim 2, characterized in that: The cone head (4) is configured as a frustum structure with a diameter gradually decreasing from an end close to the outer sheath tube (201) to an end away from the outer sheath tube (201).

4. A pusher for a partially covered or fully covered biliary metal stent according to claim 2, characterized in that: The outer sheath (201) is a plastic sheath; The outer diameter of the inner tube (202) is smaller than the inner diameter of the outer sheath tube (201); The compressed size of the metal stent (3) is smaller than the inner diameter of the outer sheath tube (201); The metal bracket (3) is arranged at one end of the inner tube (202) close to the cone head (4).

5. The pusher for a partially covered or fully covered biliary metal stent according to claim 2, characterized in that: An injection channel (104) communicating with the outer sheath tube (201) is formed inside the mounting end (101); The mounting end (101) has a syringe connection port (105), and the syringe connection port (105) is connected to the injection channel (104) so as to inject contrast agent into the outer sheath tube (201) through a syringe.

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