Injection type digestive endoscope integrated incision knife
By designing an integrated digestive endoscope cutting knife that combines injection and cutting functions, the problem of the inability to integrate mucosal cutting knives has been solved, enabling efficient operation of submucosal injection elevation and resection, and improving the efficiency of ESD surgery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2026-03-24
AI Technical Summary
Existing mucosal incision knives cannot achieve integrated submucosal injection elevation and electrocautery in ESD surgery, resulting in frequent instrument changes during the operation, consuming a lot of time for adjusting the endoscope, and affecting the efficiency of the operation.
An integrated injectable digestive endoscope cutting knife was designed, which integrates injection and cutting functions into one unit. The first and second push handles control the extension and retraction of the blade and injection head, respectively. The mucosal protrusion and resection are achieved by utilizing the channel inside the outer sheath, avoiding the need for instrument withdrawal and replacement.
It improves the efficiency of ESD surgery, reduces endoscopic adjustment time, and enhances the smoothness and efficiency of the procedure.
Smart Images
Figure CN224023635U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, specifically to an injection-type integrated digestive endoscope cutting knife. Background Technology
[0002] In clinical practice, ESD refers to endoscopic mucosal dissection, a minimally invasive technique that involves completely peeling diseased mucosa from the submucosa under endoscopy.
[0003] Endoscopic mucosal dissection (EVD) is an elective diagnostic or radical surgery. Its main purpose is to diagnose and treat early-stage gastrointestinal tumors, such as early esophageal cancer, early gastric cancer, stromal tumors, and early colonic tumors. This procedure has the advantage of completely removing a certain area of superficial lesions in a single procedure.
[0004] ESD surgery requires specialized endoscopes, high-frequency generators, high-frequency surgical electrosurgical units, water pumps, and other equipment and instruments. The mucosal incision knife is a routine instrument used in ESD surgery. There are various types of mucosal incision knives available, but none can combine submucosal injection elevation and electrosurgical incision in one procedure. This necessitates frequent exchanges of injection needles and mucosal incision knives in clinical practice, which in turn consumes a significant amount of surgical time when adjusting the endoscope, thus requiring improvements in surgical efficiency. Summary of the Invention
[0005] The purpose of this invention is to provide an injection-type integrated digestive endoscope cutting knife to solve the problems mentioned in the background art. Specifically, it eliminates the need to change the injection needle and the mucosal cutting knife during endoscopic mucosal dissection, thereby saving a significant amount of time spent adjusting the endoscope and improving surgical efficiency.
[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an injection-type integrated digestive endoscope cutting knife.
[0007] Specifically, the integrated cutting knife includes a main body, a first push handle and a second push handle, both of which are slidably mounted on the main body and can be displaced along the axial direction of the main body; it also includes a cutting head and an injection head, the cutting head being connected to an electrode plug on the first push handle via a pull lock, and the injection head being connected to a water injection head on the second push handle via a conduit. Thus, when using the cutting head, the first push handle is used to push it out, and when using the injection head, the second push handle is used to push it out.
[0008] The advantage of this design is that it adds an injection function to the traditional mucosal incision knife structure, integrating injection and incision into one instrument. During mucosal incision surgery, the injection function is first used to inject submucosal tissue to make the mucosa bulge, and then the bulging mucosa is removed. During this process, there is no need to remove the instrument from the endoscope or insert a new instrument, which improves efficiency.
[0009] Furthermore, a guidewire is also provided inside the catheter to guide the injection head. The purpose of the guidewire is to prevent blockage caused by scab formation and carbonization of the blade when cutting the mucosa, which could lead to blockage when the injection head is withdrawn.
[0010] Furthermore, the integrated cutting knife also includes an outer sheath, one end of which is connected to the main body. The outer sheath is a long, flexible tube used to enter the body through the endoscope channel. The outer sheath has a first channel for accommodating a zipper and a second channel for accommodating a catheter along its axial direction. That is, the functions of the cutting knife and the injection are integrated into the outer sheath. When the cutting head and the injection head are not in operation, they can be retracted into the outer sheath.
[0011] Furthermore, the second channel is coaxial with the central axis of the outer sheath, that is, the injection head is located at the center of the end of the outer sheath, which facilitates the precise injection of the liquid.
[0012] Furthermore, the integrated cutting knife also includes a blade head cover and an injection head cover. The blade head cover is inserted into the end of the first channel away from the main body and is used to protect the blade head. The injection head cover is inserted into the end of the second channel away from the main body and is used to protect the injection head.
[0013] Furthermore, the integrated cutting knife also includes a pusher mounted on the second pusher handle. One end of the guide wire extends out of the tube and connects to the pusher. When the injection head is blocked, pushing the pusher will displace the guide wire within the tube.
[0014] Furthermore, a hanging ring is provided in the middle of the guidewire, and a pin is provided on the pusher. The pin extends into the second pusher and passes through the hanging ring. This describes the connection method between the guidewire and the pusher.
[0015] Furthermore, the integrated cutting knife also includes an elastic element, one end of which abuts against a baffle connected to the end of the guide wire, and the other end abuts against a stop connected in the second push handle;
[0016] The purpose of the elastic element is to reset the guidewire when it is displaced. If the pusher is pushed again, the guidewire will be displaced again and reset under the action of the elastic element. The guidewire generates a cyclical motion in this process, thus opening the injection head.
[0017] Furthermore, the integrated cutting knife also includes a tee, the first end of which is connected to the end of the catheter away from the injection head, the second end of which is connected to the injection head, and the third end into which a guide wire is inserted. A seal is provided between the third end of the tee and the guide wire. The tee is designed to allow the guide wire to enter the catheter, while the seal is used to prevent leakage of the injection fluid. Attached Figure Description
[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0019] Figure 1 This is a front view of an integrated cutting knife for an injection-type digestive endoscope according to an embodiment of this utility model;
[0020] Figure 2 This is a cross-sectional view of the insertion end of an integrated cutting knife for an injection-type digestive endoscope in an embodiment of this utility model.
[0021] Figure 3 This is a cross-sectional view of the handle end of an integrated cutting knife for an injection-type digestive endoscope in an embodiment of this utility model.
[0022] In the diagram: 1. Main body; 2. First push handle; 3. Second push handle; 3-1 stop; 4. Blade head; 5. Injection head; 6. Pull lock; 7. Electrode plug; 8. Conduit; 9. Water injection head; 10. Guide wire; 10-1 hanging ring; 10-2 baffle; 11. Outer sheath; 11-1 first channel; 11-2 second channel; 12. Blade head sleeve; 13. Injection head sleeve; 14. Push knob; 14-1 pin; 15. Elastic element; 16. T-joint; 17. Sealing element. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] Example: This example provides an optimal implementation scheme for an injection-type integrated digestive endoscopy cutting tool, combined with the attached... Figure 1 ~Appendix Figure 3 Detailed explanation;
[0025] in Figure 1 This is a front view of the integrated cutting knife of the injection-type digestive endoscope;
[0026] Figure 2 This is a cross-sectional view of the insertion end of the integrated cutting knife of the injection-type digestive endoscope;
[0027] Figure 3 This is a cross-sectional view of the handle of the integrated cutting knife of the injection-type digestive endoscope;
[0028] It should be noted that the insertion end of the injection-type digestive endoscope integrated cutting knife is the end that goes into the body, while the holding end is the end that is held and operated from outside the body.
[0029] Please see the appendix Figure 1 The injection-type integrated digestive endoscope cutting knife includes a main body 1, which is basically columnar in shape and serves as a support structure for the integrated cutting knife. One end of the main body is equipped with a handle to facilitate the operation of the surgeon during the operation.
[0030] Please continue reading the appendix. Figure 1 The injection-type digestive endoscope integrated cutting knife also includes a first push handle 2 and a second push handle 3. Both the first push handle 2 and the second push handle 3 are located on both sides of the main body 1 and extend along the axial direction of the main body 1. They have a shell-like structure that is basically semi-cylindrical. Both shell-like structures encircle the cylindrical main body 1 and present a cylindrical shell-like structure. The two shell-like structures also have handles on the side away from the main body 1, which facilitates operation by doctors.
[0031] Please continue reading the appendix. Figure 1 The first push handle 2 and the second push handle 3 are both slidably mounted on the main body 1 and can be displaced along the axial direction of the main body 1. The connection method between the first push handle 2 and the second push handle 3 and the main body 1 follows the connection method between the main body and the push handle in the traditional mucosal cutting knife, that is, the connection is made by means of sliding groove and sliding block. The sliding groove also forms a blocking effect on the sliding block, limiting the displacement distance of the first push handle 2 and the second push handle 3 relative to the main body 1.
[0032] Please continue reading the appendix. Figure 1 The injection-type digestive endoscope integrated cutting knife also includes a blade head 4 and an injection head 5. The blade head 4 is used to act on the mucosa to cut the mucosa, and the injection head 5 is used to extend under the mucosa to inject into the mucosa, causing the mucosa to bulge and assist in cutting.
[0033] Please see the appendix Figure 1 ~Appendix Figure 2 The blade 4 is connected to the electrode plug 7 on the first push handle 2 via the zipper 6. The blade 4 is electrically connected to the electrode plug 7 via the zipper 6. The injection head 5 is connected to the water injection head 9 on the second push handle 3 via the conduit 8. After the water injection head 9 is connected to the injection solution, the injection solution can be injected into the subcutaneous mucosa via the conduit 8 and the injection head 5.
[0034] Please continue reading the appendix. Figure 2 The catheter 8 is also equipped with a guide wire 10 for guiding the injection head 5.
[0035] Please continue reading the appendix. Figure 1 ~Appendix Figure 2 The injection-type digestive endoscope integrated cutting knife also includes an outer sheath 11. One end of the outer sheath 11 is connected to the main body 1, and the other end is a free end. A first channel 11-1 for accommodating the zipper 6 and a second channel 11-2 for accommodating the catheter 8 are opened along its axial direction inside the outer sheath 11.
[0036] Please continue reading the appendix. Figure 1 ~Appendix Figure 2 The second channel 11-2 is coaxial with the central axis of the outer sheath 11.
[0037] Please continue reading the appendix. Figure 1 ~Appendix Figure 2 The injection-type integrated digestive endoscope cutting knife also includes a blade head sleeve 12 and an injection head sleeve 13. The blade head sleeve 12 is inserted into the end of the first channel 11-1 away from the main body 1. The blade head sleeve 12 is a rigid cylindrical structure made of metal. It has a shoulder and a groove formed on the outer sheath tube 11 to form a stop and prevent the blade head sleeve 12 from moving axially. The injection head sleeve 13 is inserted into the end of the second channel 11-2 away from the main body 1. The injection head sleeve 13 is also a rigid cylindrical structure made of metal. It also has a shoulder and a groove formed on the outer sheath tube 11 to form a stop and prevent the injection head sleeve 13 from moving axially.
[0038] Please continue reading the appendix. Figure 1 The injection-type digestive endoscope integrated cutting knife also includes a pusher 14 mounted on the second pusher 3. One end of the guide wire 10 extends out of the tube and connects to the pusher 14, while the other end of the pusher 14 extends into the second pusher 3 and connects to the guide wire 10.
[0039] Please see the appendix Figure 3 The connection between the guide wire 10 and the pusher 14 is as follows: a hanging ring 10-1 is provided in the middle of the guide wire 10, and a pin 14-1 is provided on the pusher 14. The pin 14-1 extends into the second push handle 3 and passes through the hanging ring 10-1.
[0040] Please continue reading the appendix. Figure 3 The injection-type digestive endoscope integrated cutting knife also includes an elastic element 15, which is specifically a cylindrical spring. One end of the spring abuts against the baffle 10-2 connected to the end of the guide wire 10, and the other end abuts against the stop 3-1 connected in the second push handle 3.
[0041] Please continue reading the appendix. Figure 3 The injection-type digestive endoscope integrated cutting knife also includes a three-way valve 16. The first end of the three-way valve 16 is connected to the end of the catheter 8 away from the injection head 5, the second end is connected to the water injection head 9, and the third end is inserted by a guide wire 10. A sealing element 17 is provided between the third end of the three-way valve 16 and the guide wire 10.
[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0043] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An injection-type integrated digestive endoscope cutting knife, characterized in that, The device includes a main body, a first push handle and a second push handle, both of which are slidably disposed on the main body and can be displaced along the axial direction of the main body; it also includes a cutting head and an injection head, the cutting head being connected to an electrode plug disposed on the first push handle via a pull lock, and the injection head being connected to a water injection head disposed on the second push handle via a conduit, the conduit also containing a guide wire for guiding the injection head.
2. The injection-type integrated digestive endoscope cutting knife according to claim 1, characterized in that: It also includes an outer sheath, one end of which is connected to the main body, and the outer sheath has a first channel for accommodating the zipper and a second channel for accommodating the catheter formed along its axial direction.
3. The injection-type integrated digestive endoscope cutting knife according to claim 2, characterized in that: The second channel is coaxial with the central axis of the outer sheath.
4. The injection-type integrated digestive endoscope cutting knife according to claim 2, characterized in that: It also includes a blade cap and an injection cap, wherein the blade cap is inserted into the first channel at the end away from the main body, and the injection cap is inserted into the second channel at the end away from the main body.
5. An injection-type integrated digestive endoscope cutting tool according to any one of claims 1 to 4, characterized in that: It also includes a pusher knob installed on the second pusher handle, with one end of the guide wire extending out of a tube and connected to the pusher knob.
6. The injection-type integrated digestive endoscope cutting knife according to claim 5, characterized in that: A hanging ring is provided in the middle of the guide wire, and a pin is provided on the push knob. The pin extends into the second push handle and passes through the hanging ring.
7. The injection-type integrated digestive endoscope cutting knife according to claim 5, characterized in that: It also includes an elastic element, one end of which abuts against a baffle connected to the end of the guide wire, and the other end abuts against a stop connected to the second push handle.
8. An injection-type integrated digestive endoscope cutting tool according to any one of claims 1 to 4, characterized in that: It also includes a three-way connector, the first end of which is connected to the end of the catheter away from the injection head, the second end of which is connected to the water injection head, and the guide wire is inserted into the third end.
9. The injection-type integrated digestive endoscope cutting knife according to claim 8, characterized in that: A seal is provided between the third end of the tee and the guide wire.