Cystotome

Abstract

The utility model discloses a cyst incision knife, including handle, outer tube, tool bit, electrode head and plug needle, handle and tool bit are connected in the both ends of outer tube, and the center of handle, outer tube and tool bit has the working channel of communicating in proper order, the side of handle still is equipped with the working bypass interface and the electrode bypass interface for inserting electrode head, and plug needle is blocked in the proximal end of handle, the distal end of tool bit is the taper section that gradually contracts towards the distal end, and the distal end face of taper section is annular plane, and the annular plane is connected with the outer surface of taper section and forms the circular blade edge. The utility model can be through the working channel of center and carry out the wire puncture, and after puncture is completed, the proximal end of handle is blocked through plug needle, and the liquid injection or suction work is carried out, and the working bypass interface in it can be used for liquid injection, also can be connected negative pressure pump, and the structure of instrument is simplified through the mode of sharing interface and working channel.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a cyst incision knife. Background Technology

[0002] Pancreatic pseudocysts are a common complication of severe acute pancreatitis or chronic pancreatitis. They are caused by the leakage of pancreatic juice, which irritates surrounding tissues and forms a fibrous capsule. The cyst wall is not covered by epithelial cells, making it prone to secondary infection, rupture, or compression of surrounding organs (such as the stomach wall and splenic vessels). Current clinical treatment focuses on minimally invasive drainage, with endoscopic ultrasound (EUS)-guided transgastric / duodenal stent placement being particularly recommended. This technique establishes a "bridging channel" between the cyst cavity and the digestive tract to drain the cystic fluid, resulting in minimal trauma and a low recurrence rate.

[0003] Cyst incision scalpel is a key instrument used in minimally invasive surgery to remove or drain cysts. Its core technology lies in achieving vaporization cutting and simultaneous hemostasis through the thermal effect generated when high-frequency current acts on the tissue, which significantly reduces intraoperative bleeding and shortens the operation time.

[0004] The steps of cyst incision surgery generally include: puncture, incision of the cyst, aspiration of cyst fluid, and injection of medication. In current techniques, the components performing these operations are typically distributed independently in different parts of the cyst incision knife, each working independently without interference. This results in a complex cyst incision knife structure and inconvenient operation. Furthermore, the blades in existing cyst incision knives lack clearly defined cutting edges, leading to slow cutting speeds, unclear stomas, and difficulty in timely hemoclotting. Utility Model Content

[0005] To address the technical problems of existing cyst incision knives, such as complex structure, inconvenient operation, slow cutting speed, and unclear stoma, this utility model provides a cyst incision knife to solve the above problems.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a cyst incision knife, including a handle, an outer tube, a blade, an electrode head, and a plug needle. The handle and the blade are connected to both ends of the outer tube. The handle, the outer tube, and the blade have a working channel that is connected in sequence at their centers. The side of the handle is also provided with a working bypass interface and an electrode bypass interface for inserting the electrode head. The plug needle is sealed at the proximal end of the handle. The distal end of the blade head is a tapered segment that gradually tapers towards the distal end. The distal end face of the tapered segment is an annular plane. The annular plane and the outer surface of the tapered segment are connected to form a circular cutting edge.

[0007] In an optional embodiment of this utility model, the cutter head includes a connecting part and a cutting part that are axially connected. The connecting part is located inside the outer tube and is fixedly connected to the outer tube. The cutting part abuts against the end of the outer tube, and the tapered section is located in the cutting part.

[0008] In an optional embodiment of this utility model, the outer surface of the connecting part is provided with at least one annular barb, and the annular barb is interference-fitted with the outer tube.

[0009] In an optional embodiment of this utility model, the outer surface of the connecting part further has an axially extending cutting surface, one end of which extends to the proximal end of the connecting part, and a channel for the electrode lead to pass through is formed between the cutting surface and the outer tube.

[0010] In an optional embodiment of this utility model, the plug needle includes a handle, a connecting ring connecting the handle, and a needle tip. The connecting ring is sleeved on the handle, and the needle tip is inserted into the proximal end of the handle.

[0011] In an optional embodiment of this utility model, a knob is threadedly connected to the proximal end of the handle. The outer surface of the knob is provided with anti-slip texture, and the central axis of the knob is through. The needle is inserted into the knob.

[0012] In an optional embodiment of this utility model, the knob includes an inner sleeve and an outer sleeve connected to each other, a sealing ring is fixed to the proximal end of the handle, the outer sleeve is threadedly connected to the outer surface of the handle, and the inner sleeve abuts against the sealing ring.

[0013] In an optional embodiment of this utility model, an insulating sleeve is also provided on the outer surface of the connection between the handle and the outer tube.

[0014] In an optional embodiment of this utility model, the angle between the electrode bypass interface and the central axis of the handle is 30°~45°, and a triangular plate is connected between the handle and the electrode bypass interface.

[0015] The beneficial effects of this utility model are: (1) This utility model can perform guide wire puncture through the central working channel. After puncture, the proximal end of the handle is sealed by the plug needle to perform liquid injection or aspiration. The working bypass interface can be used for liquid injection or connected to a negative pressure pump. The instrument structure is simplified by sharing the interface and working channel.

[0016] (2) The blade in this utility model has a sharp circular edge, which can quickly cut open the cyst and coagulate blood vessels to form a stoma, resulting in low intraoperative bleeding.

[0017] (3) The present invention has a knob at the near end of the handle, which makes the insertion of the guide wire and the plug needle smoother and improves the sealing effect. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1This is a front view of a specific embodiment of the cyst incision knife described in this utility model; Figure 2 This is a partial axial sectional view of a specific embodiment of the cyst incision knife described in this utility model; Figure 3 yes Figure 2 Enlarged view of point a in the middle; Figure 4 This is a perspective view of the blade in this utility model.

[0020] In the diagram, 1. Handle, 2. Outer tube, 3. Cutting head, 301. Connecting part, 302. Cutting part, 4. Electrode head, 5. Plug needle, 501. Handle, 502. Connecting ring, 503. Needle, 6. Working channel, 7. Working bypass interface, 8. Triangular plate, 9. Electrode bypass interface, 10. Conical section, 11. Annular plane, 12. Circular cutting edge, 13. Annular barb, 14. Cutting surface, 15. Electrode lead, 16. Knob, 1601. Inner sleeve, 1602. Outer sleeve, 17. Anti-slip texture, 18. Sealing ring, 19. Insulating sleeve. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] In this invention, the term "distal end" for indicating orientation refers to the end closer to the damaged tissue, and "proximal end" refers to the end farther from the damaged tissue.

[0023] Example 1 like Figures 1-4 As shown, a cyst incision knife includes a handle 1, an outer tube 2, a blade 3, an electrode head 4, and a plug needle 5. The handle 1 and the blade head 3 are connected to both ends of the outer tube 2. The handle 1, the outer tube 2, and the blade head 3 have a working channel 6 that is sequentially connected in the center. The side of the handle 1 is also provided with a working bypass interface 7 and an electrode bypass interface 9 for inserting the electrode head 4. The plug needle 5 is sealed at the proximal end of the handle 1. The working channel 6 runs through the front and back, allowing the insertion of a guidewire. After the guidewire is withdrawn, the proximal end of the working channel 6 is sealed with the plug needle 5. Fluid can be injected into the working channel 6 through the working bypass interface 7, or cyst fluid can be aspirated through the working bypass interface 7. The electrode head 4 is connected to the blade head 3 through an electrode lead 15, energizing the blade head 3.

[0024] The distal end of the blade 3 is a tapered segment 10 that gradually tapers towards the distal end. The distal end face of the tapered segment 10 is an annular plane 11, which connects with the outer surface of the tapered segment 10 to form a circular cutting edge 12. The circular cutting edge 12 forms a clear cutting edge. When the electrode head 4 is energized, the annular plane 11, with the circular cutting edge 12 as its boundary, can quickly cut the coagulated blood vessels after the cyst, forming a stoma and reducing bleeding. The tapered segment 10 can appropriately dilate the stoma.

[0025] The cutter head 3 may, but is not limited to, adopt the following structure: like Figure 4 As shown, the device includes an axially connected connecting portion 301 and a cutting portion 302. The connecting portion 301 is located inside the outer tube 2 and is fixedly connected to the outer tube 2. The cutting portion 302 abuts against the end of the outer tube 2, and the tapered section 10 is located in the cutting portion 302. The connecting portion 301 and the outer tube 2 can be fixed by an interference fit. In a preferred embodiment, the outer surface of the connecting portion 301 is provided with at least one annular barb 13, and the annular barb 13 is interference-fitted with the outer tube 2.

[0026] The plug needle 5 may, but is not limited to, adopt the following structure: The device includes a handle 501, a connecting ring 502 connecting the handle 501, and a needle 503. The connecting ring 502 is fitted onto the handle 1, and the needle 503 is inserted into the proximal end of the handle 1. Since the connecting ring 502 is normally connected to the handle 1, when it is necessary to open the proximal end of the working channel 6, the needle 5 can also be connected to the handle 1 through the connecting ring 502, without needing to be placed arbitrarily, making it convenient to use at any time.

[0027] In a preferred embodiment, the outer surface of the connection between the handle 1 and the outer tube 2 is typically fitted with an insulating sleeve 19, such as... Figure 2 As shown, the insulating sleeve 19 has a relatively long coverage length on the outer tube 2. The insulating sleeve 19 can prevent leakage at the connection between the handle 1 and the outer tube 2, and also plays a certain protective role for the outer tube 2.

[0028] The optimal angle between the electrode bypass interface 9 and the central axis of the handle 1 is 30° to 45°.

[0029] Example 2 Based on the above embodiment, the outer surface of the connecting part 301 also has an axially extending cutting surface 14. One end of the cutting surface 14 extends to the proximal end of the connecting part 301, and a channel for the electrode lead 15 to pass through is formed between the cutting surface 14 and the outer tube 2, which facilitates the installation of the electrode lead 15.

[0030] Example 3 Based on the above embodiment, a knob 16 is also threadedly connected to the proximal end of the handle 1. The outer surface of the knob 16 is provided with anti-slip texture 17. The central axis of the knob 16 is through, and the needle 503 is inserted into the knob 16. Since the working channel 6 is relatively long and the gap with the guidewire is small, the handle 1 needs to be gripped tightly when inserting the guidewire. The knob 16 can provide a handhold for the operator, and the anti-slip texture 17 on the outer surface can play an anti-slip role.

[0031] In further design, such as Figure 3 As shown, the knob 16 includes an inner sleeve 1601 and an outer sleeve 1602 connected to each other. A sealing ring 18 is fixed to the proximal end of the handle 1. The outer sleeve 1602 is threadedly connected to the outer surface of the handle 1, and the inner sleeve 1601 abuts against the sealing ring 18. The knob 16 has a relatively thin shell structure and is lightweight. Furthermore, the inner sleeve 1601 can extend towards the sealing ring 18 to form a contact surface, thereby improving the sealing effect.

[0032] Example 4 Based on the above embodiment, a triangular plate 8 is connected between the handle 1 and the electrode bypass interface 9. As shown in the figure, the triangular plate 8 is connected to the two sides of the handle 1 and the electrode bypass interface 9, and smoothly transitions with the handle 1 and the electrode bypass interface 9, so that the handle 1 and the electrode bypass interface 9 are connected to form a complete triangular shape. The triangular plate 8 can play a role in structural reinforcement, and a logo can also be designed on the surface of the triangular plate 8.

[0033] In the description of this utility model, it should be understood that the terms "inner", "outer", "axial", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In this specification, the illustrative expressions of the terms do not necessarily refer to the same embodiments. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0035] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A cyst incision knife, characterized in that: Includes a handle (1), an outer tube (2), a blade (3), an electrode head (4), and a plug (5). The handle (1) and the blade (3) are connected to both ends of the outer tube (2). The handle (1), the outer tube (2), and the blade (3) have a working channel (6) that is connected in sequence at their center. The side of the handle (1) is also provided with a working bypass interface (7) and an electrode port for inserting an electrode bypass connector. The plug (5) is sealed at the proximal end of the handle (1). The distal end of the cutter head (3) is a tapered segment (10) that gradually tapers toward the distal end. The distal end face of the tapered segment (10) is an annular plane (11). The annular plane (11) is connected to the outer surface of the tapered segment (10) to form a circular cutting edge (12).

2. The cyst incision knife according to claim 1, characterized in that: The cutter head (3) includes a connecting part (301) and a cutting part (302) connected axially. The connecting part (301) is located inside the outer tube (2) and is fixedly connected to the outer tube (2). The cutting part (302) abuts against the end of the outer tube (2). The tapered section (10) is located in the cutting part (302).

3. The cyst incision knife according to claim 2, characterized in that: The outer surface of the connecting part (301) is provided with at least one annular barb (13), and the annular barb (13) is press-fitted with the outer tube (2).

4. The cyst incision knife according to claim 2, characterized in that: The outer surface of the connecting part (301) also has an axially extending cutting surface (14), one end of which extends to the proximal end of the connecting part (301), and a channel for the electrode lead (15) to pass through is formed between the cutting surface (14) and the outer tube (2).

5. The cyst incision knife according to claim 1, characterized in that: The plug needle (5) includes a handle (501), a connecting ring (502) connecting the handle (501) and a needle (503). The connecting ring (502) is fitted onto the handle (1), and the needle (503) is inserted into the proximal end of the handle (1).

6. The cyst incision knife according to claim 5, characterized in that: The handle (1) is also threaded to a knob (16) at its proximal end. The outer surface of the knob (16) is provided with anti-slip texture (17). The central axis of the knob (16) is through, and the needle (503) is inserted into the knob (16).

7. The cyst incision knife according to claim 6, characterized in that: The knob (16) includes an inner sleeve (1601) and an outer sleeve (1602) connected to each other. A sealing ring (18) is fixed to the proximal end of the handle (1). The outer sleeve (1602) is threadedly connected to the outer surface of the handle (1). The inner sleeve (1601) abuts against the sealing ring (18).

8. The cyst incision knife according to claim 1, characterized in that: An insulating sleeve (19) is also provided on the outer surface of the connection between the handle (1) and the outer tube (2).

9. The cyst incision knife according to claim 1, characterized in that: The angle between the electrode bypass interface (9) and the central axis of the handle (1) is 30°~45°, and a triangular plate (8) is connected between the handle (1) and the electrode bypass interface (9).

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