THERMOPUNCTURE STENT IMPLANTATION DEVICE

Abstract

A thermopuncture stent implantation device has a proximal end and a distal end, the distal end of a front handle is provided with an outer tube, an insulating middle tube is provided in the outer tube, a conductive part is provided in the insulating middle tube, a terminal of the proximal end of the conductive part is connected to an external power source, a boosting tube is provided between the proximal end of the outer tube and the insulating middle tube, the distal end of the boosting tube and the proximal end of the insulating middle tube are connected with each other, the distal end of the conductive part is provided with an insulating part, on which a conductive head connected with the conductive part is distributed; the stent, after being compressed, is located in a space between the distal end of the conductive part and the outer tube.

Claims

1. An thermopuncture stent implantation device, comprising: a proximal end and a distal end, the distal end of a front handle is provided with an outer tube, the outer tube extends from the proximal end to the distal end, an outer diameter of the distal end of the outer tube is less than or equal to 3.15 mm, an insulating middle tube is provided in the outer tube, the insulating middle tube extends from the proximal end to the distal end, a conductive part is provided in the insulating middle tube, the conductive part extends from the proximal end to the distal end, a terminal of the proximal end of the conductive part can be connected to an external power source; a boosting tube is provided between the proximal end of the outer tube and the insulating middle tube, the distal end of the boosting tube and the proximal end of the insulating middle tube are connected with each other; the distal end of the conductive part is provided with an insulating part, a conductive head is distributed on the insulating part, and the conductive head is connected with the conductive part to achieve a conductive function, and the conductive part also has a function of supporting a stent; when the stent is compressed, it is located in a space between the distal end of the conductive part and the outer tube, the front handle is connected to the proximal end of outer tube, and is moved backwards along the boosting tube, to drive the outer tube to move backwards to release the stent.

2. The thermopuncture stent implantation device according to claim 1, wherein there is a gap between the insulating part and the conductive part, the conductive head is provided at a terminal of the distal end of the implantation device, one end of the conductive head extends from the distal end to the proximal end to enter the gap between the insulating part and the conductive part, and thus is connected with the conductive part to achieve the conductive function, the other end of the conductive head is covered on an outer surface of the insulating part.

3. The thermopuncture stent implantation device according to claim 1, wherein the conductive part is a hollow tubular conductive part.

4. The thermopuncture stent implantation device according to claim 3, wherein the terminal of the proximal end of the conductive part is connected with a Luer connector to implement liquid injection.

5. The thermopuncture stent implantation device according to claim 1, wherein the conductive part is a conductive wire.

6. The thermopuncture stent implantation device according to claim 1, wherein the conductive part is a nickel-titanium wire.

7. The thermopuncture stent implantation device according to claim 1, wherein the conductive part is a metal material.

8. The thermopuncture stent implantation device according to claim 7, wherein the conductive part is a stainless steel material.

9. The thermopuncture stent implantation device according to claim 1, wherein the outer tube comprises a proximal outer tube and a distal outer tube, the proximal outer tube and the distal outer tube are connected in a taper.

10. The thermopuncture stent implantation device according to claim 1, wherein the boosting tube extends towards the proximal end and is connected with a rear handle, and a positioning part is provided between the front handle and the rear handle.

11. The thermopuncture stent implantation device according to claim 1, wherein an outer surface of the conductive part at a distance from the conductive head is covered with a resistance part.

12. The thermopuncture stent implantation device according to claim 1, wherein the conductive head comprises two or four conductive wires, and the two or four conductive wires are evenly distributed within grooves on an outer surface of the insulating part.

13. The thermopuncture stent implantation device according to claim 1, wherein the other end of the conductive head close to an outer side is completely covered on an outer surface of the insulating part, and when cutting with the conductive head, a cut surface of a wound is a circular surface.

14. The thermopuncture stent implantation device according to claim 1, wherein an outer surface of the conductive part is covered with a riveting tube, one end of the conductive head extends from the distal end to the proximal end to enter a gap between the insulating part and the conductive part, and is connected with the conductive part through the riveting tube to implement a conductive function.

15. The thermopuncture stent implantation device according to claim 1, wherein a material of the insulating part is ceramic.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG. 1A is a cross-sectional schematic diagram of an implantation device;

[0023] FIG. 1B is a schematic structural diagram of a distal end of a cross-section of an implantation device;

[0024] FIG. 2 is an overall schematic diagram of an implantation device product;

[0025] FIG. 3A is a cross-sectional schematic diagram taken along B-B in FIG. 1B when a conductive part is a hollow conductive part;

[0026] FIG. 3B is a cross-sectional schematic diagram taken along C-C in FIG. 1B when a conductive part is a hollow conductive part;

[0027] FIG. 4A is a cross-sectional schematic diagram taken along B-B in FIG. 1B when a conductive part is a conductive wire;

[0028] FIG. 4B is a cross-sectional schematic diagram taken along C-C in FIG. 1B when a conductive part is a conductive wire;

[0029] FIG. 5A is a cross-sectional diagram of a proximal tail structure of a stent implantation device corresponding to FIG. 3A and FIG. 3B;

[0030] FIG. 5B is a partial enlarged diagram of FIG. 5A;

[0031] FIG. 6 is a structural cross-sectional diagram of a proximal tail of a stent implantation device corresponding to FIG. 4A and FIG. 4B;

[0032] FIG. 7A is a schematic diagram of a distal end of different types of an implantation device;

[0033] FIG. 7B is a schematic diagram of a distal end of different types of an implantation device;

[0034] FIG. 7C is a schematic diagram of a distal end of different types of an implantation device;

[0035] FIG. 7D is a schematic diagram of a distal end of different types of an implantation device;

[0036] FIG. 8A is a schematic diagram of a distal end of an integrated implantation device;

[0037] FIG. 8B is a schematic diagram of a distal end of an integrated implantation device;

[0038] FIG. 9A is a schematic diagram of a distal end of a split implantation device;

[0039] FIG. 9B is a schematic diagram of a distal end of a split implantation device;

[0040] FIG. 10A is a schematic diagram of a distal end of a flanged implantation device;

[0041] FIG. 10B is a schematic diagram of a distal end of a flanged implantation device;

[0042] FIGS. 10C is a schematic diagram of a distal end of a flanged implantation device;

[0043] FIG. 11 is a schematic diagram of a safety buckle; and

[0044] FIG. 12 is a schematic diagram of a double mushroom head stent fully opened.

DESCRIPTION OF EMBODIMENTS

[0045] In order to make the purpose, technical solutions and advantages of the present disclosure more explicit, the present disclosure will be further illustrated in detail in combination with accompanying drawings and embodiments hereinafter. It should be understood that specific embodiments described herein are only used for explaining the present disclosure, instead of limiting the present disclosure.

[0046] In the following, an end of a conductive head is defined as a distal end, and an end of a stent implantation device connected to an external power source is defined as a proximal end.

[0047] As shown in FIG. 1A, FIG. 1B and FIG. 2, the stent implantation device according to the present disclosure has the proximal end and the distal end, and the stent implantation device includes an outer tube 21, a boosting tube 22, an insulating middle tube 23, an outer tube locking cap 25, a safety lock 26, a positioning part 27, a resistance part 28, a front handle 30, a rear handle 31, a conductive base 32, a conductive plug 33, a Luer connector 34, a conductive head 11, an insulating part 12 and a conductive part 13.

[0048] The outer tube 21 includes a proximal outer tube 211 and a distal outer tube 212. The proximal outer tube 211 is provided at the distal end of the front handle 30, and can be fixed with the front handle 30 through the outer tube locking cap 25, the safety lock 26 is provided at the proximal end of the front handle 30, and the safety lock 26 has threads, which can be matched with threads on the proximal end of the front handle 30, and installed thereon. The insulating middle tube 23 and a stent are arranged within the outer tube 21, the proximal end of the stent abuts against the distal end of the insulating middle tube 23, and the distal end of the stent is close to the insulating part 12, leaving a certain gap; the proximal outer tube 211 and the distal outer tube 212 are connected in a taper. The boosting tube 22 is provided between the proximal outer tube 211 and the insulating middle tube 23, the boosting tube 22 can be made of a stainless steel material, the distal end of the boosting tube 22 and the proximal end of the insulating middle tube 23 are connected with each other; such taper design of the proximal outer tube 211 and the distal outer tube 212 makes the size of the distal outer tube 212 entering a lesion site less than or equal to 3.15 mm, and the boosting tube 22 is provided between the proximal outer tube 211 and the insulating middle tube 23, to provide a force required to release the stent. The insulating middle tube 23 can be made from a special polymer material polyether ether ketone, has high-performance electrical insulating property and thus can isolate the high-frequency electricity of the conductive part 13 from the boosting tube 22, so that the operator can completely avoid the risk of electric shock. The boosting tube 22 extends towards the proximal end and is connected with the rear handle 31, the conductive base 32 is provided at the proximal end of the rear handle 31, there is the conductive plug 33 within the conductive base 32, and the conductive plug 33 can be connected to the conductive head 11 through the conductive part 13, so as to achieve electrifying.

[0049] The positioning part 27 may be further provided between the front handle 30 and the rear handle 31, the positioning part 27 can be designed as a structure of a safety buckle 24. As shown in FIG. 11A and FIG. 11B, the positioning part 27 is the structure of the safety buckle 24, and when releasing the stent, the safety lock 26 is first loosed to move backwards the front handle 30 towards the proximal end, so as to touch the safety buckle 24, the distal end of the stent is released within the distal tissue 40, the stent implantation device is withdrawn, to pull the stent to close to the proximal tissue, and remove the safety buckle 24. The front handle 30 is continued to be withdrawn towards the proximal end, and the stent is continued to be released in the proximal tissue 41, so as to achieve an anastomosing connection of the distal tissue 40 with the proximal tissue 41 by the stent.

[0050] An outer surface of the conductive part 13 at a certain distance from the conductive head 11 can be covered with the resistance part 28. The resistance part 28 can provide a certain resistance for the stent when the stent is released, so that the stent is not easy to slip to the outside of the lesion.

[0051] The distal end of the stent implantation device further includes the conductive head 11, the insulating part 12 and the conductive part 13. When the conductive plug 33 is connected to an external high-frequency power source, the high-frequency power source is transmitted to the conductive head 11 through the conductive part 13, so that the stent implantation device has electrical cutting function, to perform a high-frequency cutting on a human tissue. The conductive part 13 can be any kind of medical metal material, such as nickel titanium material or stainless steel material; the conductive part 13 is arranged within the insulating middle tube 23, extends from the distal end to the proximal end, and is connected to the conductive plug 33 through the rear handle 31, the size of the outer diameter of the conductive part 13 can be designed according to actual needs, the present disclosure can reduce an outer diameter of an implantation part of an existing thermopuncture stent implantation device from 3.5 mm-3.6 mm (10.5 Fr-10.8 Fr) to below 3.2 mm (9 Fr) through a design of the conductive part 13, and preferably, it can be reduced to 3.15 mm (9.5 Fr). In addition, the conductive part 13 can be a hollow conductive part, so as to achieve the function of liquid injection and development, and the conductive part 13 can also be designed as a conductive wire. When the conductive part 13 is designed as a hollow conductive part, a cross-sectional diagram taken along B-B position in FIG. 1B is shown in FIG. 3A, showing a position relation of the conductive part 13, the insulating middle tube 23 and the distal outer tube 212, and a cross-sectional diagram taken along C-C position in FIG. 1B is shown in FIG. 3B, showing a position relation of the conductive part 13, the insulating middle tube 23 and the proximal outer tube 212. FIG. 5A is a cross-sectional view of a proximal tail structure of a stent implantation device corresponding to FIG. 3A and FIG. 3B, FIG. 5B is a partial enlarged view of FIG. 5A, there is the conductive plug 33 within the conductive base 32, and the conductive plug 33 can be connected to the conductive head 11 through the conductive part 13, so as to achieve electrifying. The proximal end of the conductive part 13 communicates with the Luer connector 34, a doctor can connect the Luer connector 34 with a standard injector, and can inject a liquid or a contrast agent into a hollow tube cavity, the liquid or the contrast agent passes through the tube cavity of the conductive part 13 to reach the conductive head 11 at the distal end of the implantation device, and then is injected into a patient's lesion site, the contrast agent is developed under X-ray, marking a target location of the lesion for the doctor, and the doctor can prepare for the next step of releasing the stent.

[0052] When the conductive part 13 is designed as a conductive wire, the conductive wire can adopt different sizes according to requirements. A cross-sectional diagram taken along B-B position in FIG. 1B is shown in FIG. 4A, showing a position relation of the conductive part 13, the insulating middle tube 23 and the distal outer tube 212; a cross-sectional diagram taken along C-C position in FIG. 1B is shown in FIG. 4B, showing a positional relation of the conductive part 13, the insulating middle tube 23 and the proximal outer tube 211. FIG. 6 is a structural cross-sectional view of a proximal tail of a stent implantation device corresponding to FIG. 4A and FIG. 4B, there is the conductive plug 33 within the conductive base 32, and the conductive plug 33 can be connected to the conductive head 11 through the conductive part 13, so as to achieve electrifying.

[0053] The insulating part 12 is located at the distal end of the conductive part 13, there is a certain gap between the insulating part 12 and the conductive part 13, one end of the conductive head 11 can extend from the distal end to the proximal end, to enter the gap between the insulating part 12 and the conductive part 13, so as to be connected with the conductive part 13 to achieve a conductive function, and the other end of the conductive head 11 is covered on an outer surface of the insulating part 12. High-frequency electricity is transmitted to the conductive head 11 at the distal end of the stent implantation device through the conductive part 13, so that the stent implantation device has an electrical cutting function, and can perform a high-frequency cutting and puncture on a human tissue. The insulating part 12 can be made of, such as, a ceramic material, which can prevent tissues from sticking, and make cutting more convenient.

[0054] The conductive part 13 according to the present disclosure replaces an inner tube and a conductive wire of a traditional stent implantation device, having a conductive function, and replacing an outer diameter φ1.1 mm of an original inner tube and an outer diameter φ0.3 mm of the original conductive wire with a diameter less than φ0.4 mm of the conductive part 13, with the total diameter being reduced by a space of φ1 mm (a space of 3 Fr), so that a conventional covered gastrointestinal stent (10 mm-16 mm) can be installed; and since φ3.5 mm-φ3.6 mm (10.5 Fr-10.8 Fr) of the outer diameter of an original traditional thermal implantation device is reduced to 3.15 mm (9.5 Fr), an electric implantation device can smoothly pass through a gastroscopic channel of φ3.2 mm.

[0055] The structures of the conductive head 11, the insulating part 12 and the conductive part 13 at the distal end of the stent implantation device according to the present disclosure are as shown in FIGS. 7A-7D, the conductive head 11 can comprises two or four conductive wires, one end of the conductive head 11 can extend from the distal end to the proximal end, to enter the gap between the insulating part 12 and the conductive part 13, and thus be connected with the conductive part 13 to achieve a conductive function; the other end of the conductive head 11 is covered on the outer surface of the insulating part 12. At the distal end, the conductive head 11 can be evenly distributed within grooves on an outer surface of the insulating part 12 by the two or four conductive wires, so as to achieve conductive and cutting functions. Within grooves on the outer surface of the insulating part 12, adjacent conductive wires are spaced apart in the same angle, and radially distributed on the outer surface of the insulating part 12.

[0056] As shown in FIGS. 8A-8B, one end of the conductive head 11 can extend from the distal end to the proximal end, to enter the gap between the insulating part 12 and the conductive part 13, and thus be connected with the conductive part 13 to achieve a conductive function; the other end of the conductive head 11 is fully covered on the outer surface of the insulating part 12. In this case, when cutting with the conductive head 11, a cut surface is a circular surface, instead of a straight incision, thus it is easier to stop bleeding when using a hemostatic clip to stop bleeding, which is beneficial to wound healing.

[0057] As shown in FIGS. 9A-9B, the outer surface of the conductive part 13 can be covered with a riveting tube 29, one end of the conductive head 11 can extend from the distal end to the proximal end to enter the gap between the insulating part 12 and the conductive part 13, and can be connected with the conductive part 13 through the riveting tube 29 to achieve a conductive function. The riveting tube 29 can be made of stainless steel, and can connect the conductive part 13 with the insulating part 12. As shown in FIG. 9A, the other end of the conductive head 11 can be fully covered on the outer surface of the insulating part 12, and in this case, when cutting with the conductive head 11, the cut surface is a circular surface, instead of a straight incision, which is beneficial to wound healing.

[0058] As shown in FIGS. 10A-10C, the other end of the conductive head 11 can also be distributed within a groove on the surface of the insulating part 12 in the form of one conductive wire, and is looped around a terminal of the distal end of the stent implantation device to form a “-” bevel conductive incision, and at this time, when cutting a tissue, the conductive wire looped and the conductive wire distributed within the groove are utilized. If there is no riveting tube 29, one end of the conductive head 11 is directly connected to the conductive part 13, and the other end of the conductive head 11 is distributed on the periphery of the insulating part 12, which can also achieve the conductive function.

[0059] When the stent implantation device according to the present disclosure is used, after the conductive plug 33 is connected to an external high-frequency power source, the high-frequency power source is transmitted to the conductive head 11 through the conductive part 13, so that the stent implantation device has an electrical cutting function, and can cut the diseased distal tissue 40; if the conductive part 13 is a hollow conductive part, it is connected with an external Luer connector, so as to make the stent implantation device have a liquid injection function.

[0060] As shown in FIG. 12, the double mushroom head stent 42 is released by the thermopuncture stent implantation device, and when the double mushroom head stent 42 is opened, one end of which is in the distal tissue 40 and the other end of which is in the proximal tissue 41.

[0061] The above descriptions are only preferred embodiments of the present application, so that those skilled in the art can understand or implement the present application. Multiple amendments to these embodiments and combinations thereof will be obvious to those skilled in the art, and general principles defined herein can be achieved in the other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will be not limited to these embodiments shown herein, but shall comply with the widest scope in consistent with the principles and novel features disclosed herein.