Endoscope transparent cap and endoscope tip cap structure using the same

Abstract

The utility model relates to the field of endoscope, concretely relates to an endoscope transparent cap and the endoscope tip cap structure of using it. Endoscope transparent cap includes the conical pipe department and the connecting pipe department of coaxial arrangement, wherein, the conical pipe department is round table state, and its big end part connects the connecting pipe department, the inner wall of conical pipe department is provided with the guide groove for the alignment channel hole of endoscope to the mucosa incision knife that the mucosa incision knife that stretches out from the channel hole is guided. The utility model can assist mucosa incision knife positioning, make guide mucosa incision knife can accurate, fast reach the lesion bottom.

Description

Technical Field

[0001] This utility model relates to the field of endoscopes, specifically to a transparent endoscope cap and an endoscope tip cap structure using the same. Background Technology

[0002] Endoscopic mucosal resection (EMR) is a major advancement in the treatment of early-stage gastrointestinal cancers and precancerous lesions, enabling many patients who would otherwise require surgery to be cured through minimally invasive procedures.

[0003] Traditional EMR techniques, such as injection-assisted lift-and-resection, while effective, have limitations when dealing with larger, flatter lesions, including limited resection area, insufficient resection depth, low rate of complete resection in a single procedure, and a high recurrence rate. To overcome these drawbacks, the technique is constantly being improved. Cap-Assisted EMR (EMRC) is an important development based on this. This technique involves attaching a transparent cap to the tip of an endoscope and using negative pressure suction to draw the target mucosa and submucosal tissue into the cap, creating a distinct "false stalk." This provides better exposure of the lesion, creating conditions for open surgical resection. This method significantly increases the size and depth of the tissue mass resected in a single procedure, contributing to more thorough resection and thus improving the complete resection rate and radical cure.

[0004] However, despite the numerous advantages of EMRC technology, after the operator uses negative pressure suction through the transparent cap to draw the lesion into the cap and form a false stalk, the next crucial step is to precisely place the mucosal incision knife (usually a snare) at the base of the false stalk to ensure sufficient depth and completeness of the resection. But with current technology, due to the limited angle of the endoscopic instrument channel, the limited space within the transparent cap, and the uncertainty of the tissue being drawn in, the operator often cannot directly and in one go place the mucosal incision knife in the ideal position.

[0005] Therefore, the operator must make repeated, minute adjustments: including slight advances and retreats of the endoscope, rotation of the endoscope itself, and individual adjustments to the extension angle and direction of the snare. This process not only demands a high level of skill and experience from the operator but also significantly prolongs the surgical time. Furthermore, during adjustments, negative pressure suction may be interrupted, causing the formed false pedicle to dislodge, requiring re-suction and further slowing down the process. More seriously, repeated instrument adjustments may increase the risk of accidental damage to the surrounding normal mucosa or even perforation.

[0006] Therefore, it is urgent to solve the problem that the mucosal incision knife cannot be accurately and quickly positioned. Summary of the Invention

[0007] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide an endoscope transparent cap that can assist in the positioning of the mucosal incision knife, so that the mucosal incision knife can accurately and quickly reach the bottom of the lesion.

[0008] To solve the above-mentioned technical problems, the technical solution of this utility model is: a transparent endoscope cap, comprising a conical tube portion and a connecting tube portion coaxially arranged; wherein... The tapered tube section is frustum-shaped, and its large end is connected to the connecting tube section; The inner wall of the conical tube is provided with a forceps channel hole for aligning the endoscope and a guide groove for guiding the mucosal cutting blade extending from the forceps channel hole.

[0009] Furthermore, the guide groove is formed by a guide portion connected to the inner wall of the tapered tube.

[0010] Furthermore, the bottom of the guide groove of the guide part is connected to the inner wall of the tapered tube, and the guide part is a non-closed-loop structure symmetrical about the center line of the bottom of the guide groove.

[0011] Furthermore, in order to expand the surgical field and increase the area of ​​lesion to be attracted when aspirating small lesions, the size of the notch of the guide gradually increases from the end near the end of the connecting tube to the end away from the end of the connecting tube.

[0012] Furthermore, the projection of the guide portion onto the end face of the tapered tube is C-shaped.

[0013] Furthermore, the guide groove has a constant diameter along its extension direction.

[0014] Furthermore, the bottom of the guide groove extends in a direction parallel to the axial direction of the tapered tube.

[0015] Furthermore, both the tapered tube section and the connecting tube section are made of rigid materials.

[0016] This utility model also relates to an endoscope tip cap structure, comprising: Transparent cap for endoscope; The fixing sleeve has one end fitted onto the connecting tube of the endoscope's transparent cap, and the other end fitted onto the endoscope's front end.

[0017] Furthermore, the material of the fixing sleeve is a soft material.

[0018] After adopting the above technical solution, the transparent cap of the endoscope is installed at the tip of the endoscope, ensuring that the guide groove is aligned with the forceps channel of the endoscope. During the operation, after the transparent cap of the endoscope aspirates the lesion, the mucosal incision blade extends out of the tip of the endoscope along the forceps channel and enters the guide groove. Guided by the guide groove, it accurately and quickly reaches the bottom of the lesion for resection. The transparent cap of the endoscope with the guide groove can assist in the positioning of the mucosal incision blade, thereby reducing the difficulty of the surgical operation and shortening the operation time. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of the transparent cap of the endoscope of this utility model from one perspective; Figure 2 This is a structural schematic diagram of the transparent cap for the endoscope of this utility model from another perspective; Figure 3 for Figure 1 The main view; Figure 4 for Figure 3 AA section view; Figure 5 for Figure 1 Top view; Figure 6 This is a front view of the endoscope tip cap structure of this utility model; Figure 7 for Figure 6 BB cross-sectional view; Figure 8 This is a schematic diagram of the endoscope tip cap structure of this utility model installed behind the endoscope. In the figure, 1 is the conical tube section; 2 is the connecting tube section; 3 is the guide groove; 4 is the guide section; 5 is the fixing sleeve; 6 is the drain hole; 7 is the flange; 8 is the annular groove; 10 is the endoscope; and 101 is the clamping hole. Detailed Implementation

[0020] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0021] Example 1: As Figures 1 to 8 As shown, an endoscope transparent cap includes a conical tube portion 1 and a connecting tube portion 2 arranged coaxially; wherein, The tapered tube section 1 is frustum-shaped, and its large end is connected to the connecting tube section 2; The inner wall of the cone tube 1 is provided with a forceps channel hole 101 for aligning the endoscope 10 and a guide groove 3 for guiding the mucosal cutting knife extending from the forceps channel hole 101.

[0022] Specifically, after the transparent endoscope cap is installed at the tip of the endoscope 10, ensure that the guide groove 3 is aligned with the forceps channel 101 of the endoscope 10, and that the two are concentric. During the operation, after the transparent endoscope cap attracts the lesion, the mucosal incision blade extends along the forceps channel 101 from the tip of the endoscope 10, enters the guide groove 3, and, guided by the guide groove 3, accurately and quickly reaches the bottom of the lesion for resection. Therefore, the transparent endoscope cap with the guide groove 3 can assist in the positioning of the mucosal incision blade, thereby reducing the difficulty of the surgical operation and shortening the operation time.

[0023] There are several ways to form the guide groove 3. For example, it can be formed on the inner wall of the tapered tube 1, or it can be surrounded by the guide portion 4 connected to the inner wall of the tapered tube 1. In this embodiment, the second method is adopted, and the guide portion 4 can be integrally formed with the tapered tube 1.

[0024] The tapered tube section 1 and the connecting tube section 2 can be manufactured separately and then connected to form an integral structure, or they can be integrally molded into an integral structure.

[0025] The diameter of the forceps channel 101 of the endoscope 10 is larger than the outer diameter of the mucosal incision knife, while the diameter of the forceps channel 101 is smaller than the diameter of the guide groove 3. Therefore, when the endoscope 10 is in the hook state, the mucosal incision knife extends out of the forceps channel 101 and enters the guide groove 3, and is bent by force. Its head bends to reach the bottom of the lesion for resection.

[0026] In some examples, such as Figure 1 , Figure 2 and Figure 5 As shown, the bottom of the guide groove 3 of the guide part 4 is connected to the inner wall of the tapered tube part 1. The guide part 4 is a non-closed-loop structure that is symmetrical about the center line of the bottom of the guide groove 3.

[0027] Preferably, such as Figure 5 As shown, the projection of the guide portion 4 onto the end face of the tapered tube portion 1 is C-shaped, so that the guide groove 3 matches the peripheral wall contour of the mucosal incision knife. Of course, the guide portion 4 can also be other shapes.

[0028] Preferably, such as Figure 1 , Figure 2 , Figure 4 , Figure 7 and Figure 8 As shown, the size of the notch in the guide section 4 gradually increases from the end near the end of the connecting pipe section 2 to the end far from the end of the connecting pipe section 2.

[0029] Considering that the endoscopic transparent cap needs to aspirate lesions during the operation, this design can, on the one hand, expand the surgical field when aspirating small lesions, and on the other hand, increase the area of ​​lesion that can be aspirated.

[0030] Preferably, such as Figure 4 , Figure 7and Figure 8 As shown, the bottom of the guide groove 3 extends parallel to the axial direction of the tapered tube 1.

[0031] In this way, the mucosal incision blade, after entering the guide groove 3, maintains its forward direction from when it extended through the forceps port 101 of the endoscope 10, and continues to move axially along the forceps port 101, which is more in line with the operator's usage habits. Furthermore, compared to the mucosal incision blade moving against the bottom of the tapered guide groove 2, the curvature of the mucosal incision blade is reduced, thus allowing for better control and further reducing the difficulty of the surgery.

[0032] The inner peripheral wall of the tapered tube section 1 is tapered, and the guide section 4 can compensate for the taperedness of the inner peripheral wall of the tapered tube section 1 through its own structure, so that the extension direction of the bottom of the guide groove 3 is parallel to the axial direction of the tapered tube section 1.

[0033] In some examples, the guide groove 3 has a constant diameter along the extension direction.

[0034] In some examples, both the conical tube section 1 and the connecting tube section 2 are made of rigid materials, such as PC or PE. This allows the transparent cap of the endoscope to be easily drilled downwards and accurately inserted into the human body cavity.

[0035] In some examples, such as Figures 1 to 8 As shown, a drain hole 6 is provided on the side of the tapered tube section 1 away from the guide groove 3.

[0036] Considering that flushing is required during surgery and that high-frequency electrodissection will generate a large amount of mist, a drainage hole 6 is provided to facilitate the removal of mist and flushing water generated during surgery, maintain a clear view of the lens, and prevent the endoscope 10 lens from blurring and affecting the operator's vision.

[0037] Example 2: Figure 6 , Figure 7 and Figure 8 As shown, an endoscope tip cap structure includes: Transparent cap for endoscope; The fixing sleeve 5 has one end fitted onto the connecting tube 2 of the endoscope transparent cap, and the other end fitted onto the front end of the endoscope 10.

[0038] like Figure 7 As shown, the end of the connecting tube 2 furthest from the conical tube 1 is provided with a flange 7 that protrudes outward in the circumferential direction. The inner circumferential wall of the fixing sleeve 5 is provided with an annular groove 8. After the fixing sleeve 5 is fitted onto the connecting tube 2, the flange 7 is embedded in the annular groove 8. In this way, a firm connection between the fixing sleeve 5 and the endoscope transparent cap can be ensured.

[0039] In some examples, the fixing sleeve 5 is made of a soft material, such as TPU or TPE. This makes it easy for the fixing sleeve 5 to be fitted onto the endoscope's transparent cap and to clamp the front end of the endoscope 100, achieving an interference fit.

[0040] 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 transparent cap for an endoscope, characterized in that, It includes a tapered tube section (1) and a connecting tube section (2) arranged coaxially; wherein, The tapered tube (1) is frustum-shaped, and its large end is connected to the connecting tube (2). The inner wall of the conical tube (1) is provided with a guide groove (3) for aligning the endoscope (10) with a forceps hole (101) and for guiding the mucosal cutting knife extending from the forceps hole (101).

2. The endoscope transparent cap according to claim 1, characterized in that, The guide groove (3) is formed by the guide portion (4) connected to the inner wall of the tapered tube portion (1).

3. The endoscope transparent cap according to claim 2, characterized in that, The bottom of the guide groove (3) of the guide part (4) is connected to the inner wall of the tapered tube part (1). The guide part (4) is a non-closed loop structure that is symmetrical about the center line of the bottom of the guide groove (3).

4. The endoscope transparent cap according to claim 3, characterized in that, The size of the notch in the guide section (4) gradually increases from the end near the end of the connecting pipe section (2) to the end away from the end of the connecting pipe section (2).

5. The endoscope transparent cap according to claim 2, characterized in that, The projection of the guide portion (4) on the end face of the tapered tube portion (1) is C-shaped.

6. The endoscope transparent cap according to claim 1, characterized in that, The guide groove (3) has a constant diameter along the extension direction.

7. The endoscope transparent cap according to claim 1, characterized in that, The bottom of the guide groove (3) extends parallel to the axial direction of the tapered tube (1).

8. The endoscope transparent cap according to claim 1, characterized in that, Both the tapered tube section (1) and the connecting tube section (2) are made of hard materials.

9. An endoscope tip cap structure, characterized in that, include: The endoscope transparent cap according to any one of claims 1-8; The fixing sleeve (5) has one end fitted onto the connecting tube (2) of the endoscope transparent cap, and the other end fitted onto the front end of the endoscope (10).

10. The endoscope tip cap structure according to claim 9, characterized in that, The fixing sleeve (5) is made of a soft material.

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