Cutter head dredging device for mucous membrane incision knife

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a mucous membrane incision knife head dredging device which comprises a guide column, a fixing base, a dredging wire and a guide pipe, the two ends of the guide column in the axial direction are a first end and a second end respectively, and a first inserting groove and a second inserting groove which are communicated with each other are formed in the guide column. The fixed seat is detachably connected to the second end part of the guide column; one end of the dredging wire is connected with the fixing seat, the other end of the dredging wire extends into the first inserting groove from the second inserting groove, and the dredging wire is sleeved with the guide pipe; the guide column is used for guiding the dredging process of the tool bit and the dredging wire, operation can be facilitated, operation efficiency is improved, meanwhile, the guide pipe in the guide column is used for effectively supporting the dredging wire, structural strength is improved, the dredging wire is prevented from deforming in the dredging process, and the dredging effect is improved. And the fixing seat and the guide column which are detachably connected are utilized to form two dredging devices with different structures to dredge the tool bits in different states.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a mucosal incision knife head dredging device. Background Art

[0002] A disposable mucosal cutter is a minimally invasive surgical instrument that is commonly used for curative resection of superficial lesions in the patient's digestive tract, such as resection of submucosal tumors of the digestive tract. The fundamental principle is to use high-frequency current to generate heat in the surgical blade. Through the heat effect, the tissue is heated to above the protein coagulation point, causing the cell protein to denature and coagulate, and the surrounding tissue fluid to solidify into a solid gel, thereby achieving the effects of cutting, coagulation and hemostasis.

[0003] Usually, after curative resection with a mucosal incision knife, the injection hole of the blade becomes clogged after a long period of cutting, making it difficult to flush or rehydrate the wound during surgery. Utility Model Content

[0004] The technical problem to be solved by the present invention is: in order to solve the problem in the prior art that the injection hole of the blade is blocked after a long period of cutting, which makes it difficult to flush or replenish the wound during surgery, a mucosal incision blade unclogging device is now provided.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a mucosal incision knife head dredging device, the knife head includes an outer sheath tube and an injection hole located in the center of the outer sheath tube, the dredging device is used to dredge the injection hole, and the dredging device includes:

[0006] The guide post has two ends along its axial direction, namely a first end and a second end, and a first slot and a second slot are formed in the guide post, which are connected to each other. The first slot and the second slot both extend along the axial direction of the guide post. The end of the first slot away from the second slot passes through the end surface of the first end of the guide post for the insertion of the tool bit, and the second slot passes through the end surface of the second end of the guide post.

[0007] a fixing seat detachably connected to the second end portion of the guide post;

[0008] A dredging wire, one end of which is connected to the fixing seat, and the other end of which extends from the second slot into the first slot;

[0009] And a guide tube, which is sleeved on the outside of the dredging wire to support the dredging wire. The outer diameter of the guide tube is larger than the diameter of the liquid injection hole of the cutter head and smaller than the outer diameter of the outer sheath tube of the cutter head.

[0010] During use, first insert the cutting knife head into the first slot of the guide post. After the head is guided by the first slot, the dredging wire is inserted into the liquid injection hole of the head. Then fix the head and push the dredging device. The dredging wire continuously enters the liquid injection hole of the head. Then move the dredging device back and forth to ensure that the tissue in the liquid injection hole of the head is loosened. Under the support of the guide tube, the dredging wire has high structural strength and is not easily deformed during the dredging process. Finally, take out the cutting knife head to complete the dredging work;

[0011] When there is too much tissue on the cutting knife head and it cannot be inserted into the first slot or when there is too much tissue on the head and it cannot be aligned with the dredging wire, the guide post can be removed at this time. The fixing seat and the dredging wire can form a new dredging device. During operation, directly observe visually to align the dredging wire with the liquid injection hole of the head for dredging.

[0012] Furthermore, the guide tube is fixedly sleeved outside the dredging wire to form a fixed guide tube. One end of the fixed guide tube is connected to the fixing seat, and the other end extends into the second slot and does not extend into the first slot. That is, the fixed guide tube supports the rear end of the dredging wire to improve its structural strength.

[0013] Furthermore, the guide tube is slidably sleeved outside the dredging wire to form a sliding guide tube. An elastic element is provided between the sliding guide tube and the fixing seat, and the elastic element is sleeved outside the dredging wire. In the initial state, the sliding guide tube extends from the second slot into the first slot to support the front end of the dredging wire. When the head gradually enters the first slot and the dredging wire extends into the liquid injection hole, the outer sheath tube applies force to the guide tube. At this time, the elastic element is compressed, and the guide tube gradually moves backward to support the rear end of the dredging wire. After dredging, the guide tube can be reset under the action of the elastic element.

[0014] Furthermore, a plurality of visual windows are axially provided on the guide post at intervals. The visual windows radially penetrate the wall of the first slot from the outer peripheral wall of the guide post. During the process of gradually inserting the head into the first slot, the dredging process of the head can be observed through the visual windows to confirm the insertion situation of the dredging wire.

[0015] Furthermore, a second step is provided inside the second slot. A limiting protrusion for abutting against the second step protrudes radially from one end of the sliding guide tube close to the fixing seat. In the initial state, the limiting protrusion abuts against the second step under the elastic force of the elastic element to limit the sliding guide tube. During the process of gradually inserting the head into the first slot, the dredging wire gradually enters the liquid injection hole, and the outer sheath tube pushes the sliding guide tube backward, and the limiting protrusion separates from the second step.

[0016] Further, the diameter of the first slot is larger than that of the second slot to form a first step for restricting the insertion length of the tool bit. When the tool bit abuts against the first step, the dredging wire reaches the bottom of the liquid injection hole. At this time, the dredging device can be moved backward for the next dredging.

[0017] Further, a plurality of anti-slip protrusions are provided on the outer peripheral wall of the fixing base and are evenly distributed along its circumferential direction, which can increase the friction force with the fixing base, thereby improving the operation stability.

[0018] Further, the guide post is threadedly connected to the fixing base, so that the detachable connection between the two can be realized.

[0019] Further, the fixing base includes a central convex portion located at its central part and used for inserting into the second slot. The cross-sectional areas of the central convex portion and the second slot gradually increase from the first slot to the direction of the second slot. That is, both are conical structures, with the front small and the rear large, which can guide the insertion of the two.

[0020] Further, the central convex portion is provided with a fixing groove for inserting the dredging wire, and one end of the fixing groove close to the guide post expands to form an installation groove for installing the elastic element. One end of the elastic element abuts against the limiting protrusion, and the other end abuts against the groove wall of the installation groove.

[0021] The beneficial effects of the present utility model are as follows: The present utility model uses the guide post to guide the dredging process of the tool bit and the dredging wire, which is convenient for operation and improves the operation efficiency. At the same time, the guide tube inside the guide post is used to effectively support the dredging wire, improving the structural strength and avoiding deformation during the dredging process. And the detachable connection between the fixing base and the guide post forms two different structural dredging devices to dredge the tool bits in different states.

[0022] Other features and advantages of the present application will become clear through the following detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following further illustrates the present utility model in conjunction with the drawings and embodiments.

[0024] Figure 1 is a schematic structural diagram of Embodiment 1;

[0025] Figure 2 is a cross-sectional view of Embodiment 1;

[0026] Figure 3 is the dredging device after removing the guide post in Embodiment 1;

[0027] Figure 4 is a schematic structural diagram of Embodiment 2;

[0028] Figure 5 is a sectional view of the second embodiment;

[0029] Figure 6 is the dredging device after removing the guide post in the second embodiment;

[0030] Figure 7 is a schematic structural view of the cutter head inserted into the first slot and the dredging wire not yet inserted into the liquid injection hole in the second embodiment;

[0031] Figure 8 is a schematic structural view of the cutter head inserted into the first slot and the dredging wire just inserted into the liquid injection hole in the second embodiment;

[0032] Figure 9 is a schematic structural view of the dredging wire inserted into the bottom of the liquid injection hole in the second embodiment;

[0033] In the figure:

[0034] 1. Guide post; 101. First end; 102. Second end; 103. First slot; 104. Second slot; 105. Visual window; 106. First step; 107. Second step;

[0035] 2. Fixed seat; 201. Anti-slip protrusion; 202. Central protrusion; 203. Fixed groove; 204. Installation groove;

[0036] 3. Dredging wire;

[0037] 4. Guide tube; 401. Limit protrusion;

[0038] 5. Elastic element;

[0039] 6. Cutter head. Detailed implementation manners

[0040] Now, the present utility model will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner. Therefore, they only show the components related to the present utility model. Directions and references (such as up, down, left, right, etc.) can only be used to assist in the description of the features in the drawings. Therefore, the following detailed implementation manners are not adopted in a restrictive sense, and the scope of the claimed subject matter is only defined by the appended claims and their equivalent forms.

[0041] In this embodiment, the "front end" is the end close to the guide post, and the "rear end" is the end close to the fixed seat.

[0042] Embodiment 1:

[0043] As Figures 1 - 3As shown in the figure, a device for dredging the tip of a mucosal incision knife, the tip 6 includes an outer sheath tube and a liquid injection hole located at the central part of the outer sheath tube. The dredging device is used to dredge the liquid injection hole, and the dredging device includes a guiding column 1, a fixing seat 2, a dredging wire 3 and a guiding tube 4:

[0044] The two ends of the guiding column 1 along its axis are respectively a first end 101 and a second end 102, and a first slot 103 and a second slot 104 which are interconnected are opened inside the guiding column 1. Both the first slot 103 and the second slot 104 extend along the axis of the guiding column 1. One end of the first slot 103 far from the second slot 104 penetrates through the end face of the first end 101 of the guiding column 1 for the tip 6 to be inserted, and the front end of the first slot 103 is a conical surface. The second slot 104 penetrates through the end face of the second end 102 of the guiding column 1;

[0045] The diameter of the first slot 103 is larger than the diameter of the second slot 104 to form a first step 106 for restricting the insertion length of the tip 6. When the tip 6 abuts against the first step 106, the dredging wire 3 reaches the bottom of the liquid injection hole. At this time, the dredging device can be moved backward to perform the next round of dredging.

[0046] The guiding column 1 is provided with a plurality of visually observable windows 105 which are distributed at intervals along its axis. The visually observable windows 105 radially penetrate through the wall of the first slot 103 from the outer peripheral wall of the guiding column 1; During the process of the tip 6 being gradually inserted into the first slot 103, the dredging process of the tip 6 can be observed through the visually observable windows 105 to confirm the insertion situation of the dredging wire 3.

[0047] The fixing seat 2 is detachably connected to the second end 102 of the guiding column 1. In this embodiment, the connection method between the two is not limited, and it can be plug-in connection, snap connection, etc. Preferably, the fixing seat 2 and the guiding column 1 can adopt threaded connection; A plurality of anti-slip protrusions 201 which are evenly distributed along its circumferential direction are provided on the outer peripheral wall of the fixing seat 2, which can increase the friction force with the fixing seat 2, thereby improving the operation stability; The fixing seat 2 includes a central protrusion 202 located at its central part and used for inserting into the second slot 104. The central protrusion 202 is provided with a fixing groove 203 for the dredging wire 3 to be inserted, and the cross-sectional areas of the central protrusion 202 and the second slot 104 gradually increase from the first slot 103 to the direction of the second slot 104, that is, both of them are conical structures, smaller in the front and larger in the back, which can guide the plug-in connection of the two.

[0048] One end of the dredging wire 3 is connected to the fixing seat 2, and the other end extends into the first slot 103 from the second slot 104, and its front end is a conical structure.

[0049] The guiding tube 4 is sleeved outside the dredging wire 3 to support the dredging wire 3. The outer diameter of the guiding tube 4 is larger than the diameter of the liquid injection hole of the cutter head 6 and smaller than the outer diameter of the outer sheath tube of the cutter head 6. In this embodiment, the guiding tube 4 is fixedly sleeved outside the dredging wire 3 to form a fixed guiding tube. One end of the fixed guiding tube is connected to the fixed seat 2, and the other end extends into the second slot 104 and does not extend into the first slot 103 to avoid interfering with the cutter head 6. The fixed guiding tube 4 supports the rear end of the dredging wire 3 to improve its structural strength.

[0050] Working principle:

[0051] During use, first insert the cutting knife cutter head 6 into the first slot 103 of the guiding column 1. After the cutter head 6 is guided by the first slot 103, the dredging wire 3 can be smoothly inserted into the liquid injection hole. Then fix the cutter head 6 and push the dredging device. The dredging wire 3 continuously enters the liquid injection hole of the cutter head 6. Then move the dredging device back and forth to ensure that the tissue in the liquid injection hole of the cutter head 6 is loosened. Under the supporting effect of the guiding tube 4, the dredging wire 3 has high structural strength and is not easily deformed during the dredging process. Finally, take out the cutting knife cutter head 6 to complete the dredging work;

[0052] When there is too much tissue on the cutting knife cutter head 6 and it cannot be inserted into the first slot 103 or when there is too much tissue on the cutter head 6 and it cannot be aligned with the dredging wire 3, at this time, the guiding column 1 can be removed. The fixed seat 2, the dredging wire 3 and the guiding tube 4 can form a new dredging device. During operation, directly observe visually to align the dredging wire 3 with the liquid injection hole of the cutter head 6 for dredging.

[0053] Embodiment 2:

[0054] As Figures 4 - 9 shown, the difference between Embodiment 2 and Embodiment 1 is that in this embodiment, the guiding tube 4 is slidably sleeved outside the dredging wire 3 to form a sliding guiding tube. An elastic element 5 is provided between the sliding guiding tube and the fixed seat 2. The elastic element 5 is sleeved outside the dredging wire 3, and the elastic element 5 is a spring. A second step 107 is provided inside the second slot 104. A limiting protrusion 401 for abutting against the second step 107 protrudes radially from one end of the sliding guiding tube close to the fixed seat 2. One end of the fixing groove 203 close to the guiding column 1 expands to form an installation groove 204 for installing the elastic element 5. One end of the elastic element 5 abuts against the limiting protrusion 401, and the other end abuts against the groove wall of the installation groove 204. After splitting the guiding column 1 and the fixed seat 2, the fixed seat 2 and the dredging wire 3 form a new dredging device.

[0055] In the initial state, the limiting protrusion 401 abuts against the second step 107 under the elastic force of the elastic element 5 to limit the sliding guide tube. The sliding guide tube extends into the first slot 103 from the second slot 104 to support the front end of the dredging wire 3. When the cutter head 6 gradually enters the first slot 103 and the dredging wire 3 extends into the liquid injection hole, an external sheath tube applies a force to the guide tube 4. At this time, the elastic element 5 is compressed, and the sliding guide tube gradually moves backward to support the rear end of the dredging wire 3. After dredging, the sliding guide tube can be reset under the action of the elastic element 5.

[0056] Based on the ideal embodiments of the present invention as inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A mucosal incision knife head dredging device, characterized by: include: The guide column (1) has two ends along its axial direction, namely a first end (101) and a second end (102), and a first slot (103) and a second slot (104) are provided inside the guide column (1), the first slot (103) passing through the end surface of the first end (101) for inserting the cutter head (6), and the second slot (104) passing through the end surface of the second end (102); A fixing seat (2) detachably connected to the second end portion (102) of the guide column (1); A dredging wire (3), one end of which is connected to the fixing seat (2), and the other end of which extends from the second slot (104) into the first slot (103); and a guide tube (4), which is sleeved on the outside of the dredging wire (3) to support the dredging wire (3).

2. The mucosal scalpel head dredging device according to claim 1, characterized in that: The guide tube (4) is fixedly sleeved on the outside of the dredging wire (3) to form a fixed guide tube, and one end of the fixed guide tube is connected to the fixing seat (2), and the other end extends into the second slot (104).

3. The mucosal scalpel head dredging device according to claim 1, characterized in that: The guide tube (4) is slidably sleeved on the outside of the dredging wire (3) to form a sliding guide tube, and an elastic element (5) is provided between the sliding guide tube and the fixing seat (2), and the elastic element (5) is sleeved on the outside of the dredging wire (3).

4. The mucosal scalpel head dredging device according to claim 1, characterized in that: The guide column (1) is provided with a plurality of spaced-apart visual windows (105) along its axial direction, and the visual windows (105) radially penetrate the wall of the first slot (103) from the outer peripheral wall of the guide column (1).

5. The mucosal scalpel tip dredging device according to claim 3, characterized in that: A second step (107) is provided inside the second slot (104), and a limiting protrusion (401) protrudes radially from one end of the sliding guide tube close to the fixing seat (2) for abutting against the second step (107).

6. The mucosal scalpel head dredging device according to claim 1, characterized in that: The diameter of the first slot (103) is greater than the diameter of the second slot (104) to form a first step (106) that limits the insertion length of the cutter head (6).

7. The mucosal scalpel tip dredging device according to claim 1, characterized in that: The outer peripheral wall of the fixing seat (2) is provided with a plurality of anti-slip protrusions (201) evenly distributed along its circumference.

8. The mucosal scalpel head dredging device according to claim 1, characterized in that: The guide column (1) is threadedly connected to the fixing seat (2).

9. The mucosal scalpel head dredging device according to claim 3, characterized in that: The fixing seat (2) comprises a central protrusion (202) located at its center and used for inserting into the second slot (104); the cross-sectional areas of the central protrusion (202) and the second slot (104) gradually increase from the first slot (103) to the second slot (104).

10. The mucosal scalpel head dredging device according to claim 9, characterized in that: The central protrusion (202) is provided with a fixing groove (203) for inserting the dredging wire (3), and the fixing groove (203) is expanded near one end of the guide column (1) to form an installation groove (204) for installing the elastic element (5), and one end of the elastic element (5) is in contact with the limiting protrusion (401), and the other end is in contact with the groove wall of the installation groove (204).

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