Telescopic crochet hook traction cap for endoscope

Abstract

The invention discloses a telescopic crochet hook traction cap for an endoscope, and relates to the technical field of medical instruments, the telescopic crochet hook traction cap comprises a traction cap main body, at least one push-pull plate is slidably mounted on the traction cap main body, a sliding block is fixedly mounted at one end of the push-pull plate, and a pair of auxiliary limiting blocks is fixedly mounted on the sliding block; a cross-shaped sliding groove matched with the sliding block and the auxiliary limiting blocks is formed in the traction cap body, and the sliding block and the pair of auxiliary limiting blocks are arranged in the cross-shaped sliding groove in a sliding mode; overall stretching and retracting of the bearded needle assembly are achieved through the slidable push-pull plate structure, and the traction position can be flexibly adjusted in endoscope operation conveniently. The rubber sleeve at the tail end of the crochet hook is clamped by an instrument for operation, so that the accuracy and controllability of hooking and releasing tissues are improved. The design that the crochet hook can be contained in the groove reduces the overall dimension of the instrument when the instrument passes through the cavity, and the elastic traction force provided by the rubber band is beneficial to soft traction of the tissue.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a retractable hook traction cap for endoscopes. Background Technology

[0002] An endoscopic traction cap is an auxiliary device installed at the tip of an electronic endoscope. Its main function is to pull on the mucosal tissue around the lesion using its designed traction components without occupying the endoscope's only instrument channel, thereby improving the exposure of the surgical field and facilitating endoscopic treatment procedures. In clinical practice, especially in surgeries such as endoscopic submucosal dissection (ESD) that require a large operating space, good visual exposure is one of the key factors for surgical success. Existing endoscopic traction devices mostly have fixed or flexible single-component traction components, which have some limitations in use. For example, the extension position of the traction component is fixed, and it cannot be flexibly adjusted according to the size and location of the lesion; or, its hook component cannot be effectively and stably stored after use, increasing the risk of scraping the mucosa when the endoscope travels in narrow cavities; in addition, the hook release and retrieval operation of some devices is not simple enough, requiring special tools or complicated steps, which affects the smoothness of the surgical operation. To address the shortcomings of the existing technology, this invention designs a retractable hook traction cap for endoscopes. This solves the technical problems of existing traction devices, such as a fixed and unadjustable traction range, inconvenient storage of the hook assembly, and insufficiently simple and efficient operation. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a retractable hook traction cap for endoscopes, which solves the technical problems mentioned in the background section.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a retractable hook traction cap for endoscopy, comprising a traction cap body, on which at least one push-pull plate is slidably mounted, and a slider is fixedly mounted at one end of the push-pull plate. A pair of auxiliary limiting blocks are fixedly mounted on the slider. The traction cap body has a cross-shaped groove adapted to the slider and the auxiliary limiting blocks, and the slider and the pair of auxiliary limiting blocks are slidably disposed inside the cross-shaped groove. A pair of placement grooves are formed on the lower wall of the push-pull plate, and a hook groove is formed at one end of the placement groove. A rubber band is installed inside the placement groove, and a hook is installed at the end of the rubber band away from the inside of the placement groove. The hook is limited and hung in the hook groove. A rubber sleeve is installed at the end of the hook. A limiting rod is hinged inside the traction cap body, and a plurality of limiting grooves are formed on the slider. A reserved space is formed inside the traction cap body for the movement of the limiting rod, and the limiting rod can be selectively engaged with different limiting grooves by rotation.

[0005] Preferably, the number of push-pull plates is one or a pair. When there is a pair of push-pull plates, they are symmetrically distributed and installed on the main body of the pull cap.

[0006] Preferably, the end of the placement slot away from the crochet hook slot has a set slot for storing the rubber band and crochet hook.

[0007] Preferably, the cross-sectional shape of the cross groove is adapted to the combined cross-sectional shape of the slider and a pair of auxiliary limiting blocks, in order to restrict the slider from rotating in the horizontal plane.

[0008] Preferably, the hook is made of an elastic metal material and is straight or pre-bent in its natural state.

[0009] Preferably, the rubber sleeve covers the end hook of the hook needle.

[0010] Preferably, the limiting rod is hinged to the inside of the traction cap body via a rotating shaft, and maintains its engagement tendency with the limiting groove by its own weight or the elastic force of the elastic reset component.

[0011] Preferably, this traction cap is suitable for endoscopic submucosal dissection (ESD).

[0012] Beneficial effects This invention provides a retractable hook traction cap for endoscopy. The invention utilizes a sliding push-pull plate structure to achieve overall retraction of the hook assembly, facilitating flexible adjustment of the traction position during endoscopic procedures. Operation is performed using a rubber sleeve at the end of the hook held by the instrument, improving the accuracy and controllability of tissue retrieval and release. The design of the hook retracting into a groove reduces the external dimensions of the instrument when passing through the cavity, and the elastic traction force provided by the rubber band helps to achieve gentle traction on the tissue. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the internal structure of the retractable hook traction cap for endoscopes according to the present invention.

[0014] Figure 2 This is a schematic diagram of the push-pull plate structure of the retractable hook traction cap for endoscopes according to the present invention.

[0015] In the diagram: 1. Main body of the pull cap; 2. Push-pull plate; 3. Slider; 4. Auxiliary limit block; 5. Cross slide groove; 6. Limiting rod; 7. Hook groove; 8. Placement groove; 9. Rubber band; 10. Hook; 11. Rubber sleeve; 12. Limiting groove; 13. Set groove. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figure 1-2 This invention provides a technical solution: a retractable hook traction cap for endoscopy, comprising a traction cap body 1, on which at least one push-pull plate 2 is slidably mounted, and a slider 3 is fixedly mounted on one end of the push-pull plate 2. A pair of auxiliary limiting blocks 4 are fixedly mounted on the slider 3. The traction cap body 1 has a cross groove 5 adapted to the slider 3 and the auxiliary limiting blocks 4, and the slider 3 and the pair of auxiliary limiting blocks 4 are slidably disposed inside the cross groove 5. A pair of placement slots 8 are formed on the lower wall of the push-pull plate 2. A hook groove 7 is provided at one end of the placement groove 8; a rubber band 9 is installed inside the placement groove 8, and a hook 10 is installed at the end of the rubber band 9 away from the inside of the placement groove 8. The hook 10 is limited and hung in the hook groove 7; a rubber sleeve 11 is installed at the end of the hook 10; a limiting rod 6 is hinged inside the pulling cap body 1; a plurality of limiting grooves 12 are provided on the slider 3; a reserved space is provided inside the pulling cap body 1 for the limiting rod 6 to move; the limiting rod 6 can be selectively engaged with different limiting grooves 12 by rotation.

[0018] In this embodiment, the number of push-pull plates 2 is one or a pair. When there is a pair of push-pull plates 2, they are symmetrically distributed and installed on the main body 1 of the pull cap.

[0019] In this embodiment, the placement groove 8 is further configured such that a set groove 13 for storing the rubber band 9 and the crochet hook 10 is provided at one end away from the crochet hook groove 7.

[0020] In this embodiment, the cross-sectional shape of the cross groove 5 is adapted to the combined cross-sectional shape of the slider 3 and a pair of auxiliary limiting blocks 4, so as to restrict the slider 3 from rotating in the horizontal plane.

[0021] In this embodiment, the hook 10 is further configured to be made of an elastic metal material, which is straight or pre-bent in its natural state.

[0022] In this embodiment, the rubber sleeve 11 is further configured to cover the end hook of the hook 10.

[0023] In this embodiment, the limiting rod 6 is further configured to be hinged to the inside of the traction cap body 1 via a rotating shaft, and maintains the engagement tendency with the limiting groove 12 by its own weight or the elastic force of the elastic reset component.

[0024] In this embodiment, the traction cap is further configured to be suitable for endoscopic submucosal dissection (ESD).

[0025] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.

[0026] Example: Primarily used to assist in tissue traction operations during endoscopic surgeries such as endoscopic submucosal dissection (ESD).

[0027] The traction cap mainly consists of a traction cap body 1. The traction cap body 1 is usually made of medical polymer material, and its base part can be used to connect and fix it to the standard components of the endoscope tip.

[0028] A push-pull plate 2 is slidably mounted on the main body 1 of the traction cap. The number of push-pull plates 2 can be one or a pair. When a pair is provided, the two push-pull plates 2 are symmetrically distributed about the central axis of the traction cap main body 1 to provide traction function on both sides. A slider 3 is fixedly mounted on one end of the push-pull plate 2 that extends into the traction cap main body 1, and a pair of auxiliary limiting blocks 4 are fixedly mounted on both sides of the slider 3. A cross-shaped groove 5 is formed on the traction cap main body 1, the cross-sectional shape of which is adapted to the combined shape of the slider 3 and the pair of auxiliary limiting blocks 4. The slider 3 and the auxiliary limiting blocks 4 are nested together inside the cross-shaped groove 5 and can slide along its length. This fit effectively prevents the push-pull plate 2 from twisting or shifting during sliding, ensuring the stability of the movement.

[0029] To ensure reliable positioning of the push-pull plate 2 after movement, a limiting rod 6 is hinged to the inside of the traction cap body 1 via a pivot. This limiting rod 6 can rotate around its hinge point. A series of limiting grooves 12 are formed on the side of the slider 3 along its direction of movement. When the surgeon pushes the push-pull plate 2, the slider 3 moves accordingly. When it is necessary to fix the push-pull plate 2 in a certain position, the limiting rod 6 can be moved through the pre-reserved operating window on the traction cap body 1 or by using an instrument, causing its end to fall into the corresponding limiting groove 12. This mechanical engagement prevents the slider 3 from moving accidentally, thus achieving the stroke positioning of the push-pull plate 2.

[0030] The lower wall surface (i.e., the side facing the tissue) of the push-pull plate 2 is provided with a pair of placement slots 8, one end of each placement slot 8 leading to a hook slot 7. One end of a rubber band 9 is fixedly installed at the bottom of the placement slot 8, and the other end is connected to a hook 10. In the non-use state, the hook portion of the hook 10 can be hung in the hook slot 7. At this time, the rubber band 9 is in a relaxed or slightly stretched state, so that the hook 10 is stably stored, avoiding scratching the mucosa when the endoscope enters or exits the human body cavity. The hook end of the hook 10 is covered with a rubber sleeve 11. This design can increase the friction when hooking the tissue, prevent slippage, and at the same time avoid the sharp hook tip from puncturing the tissue.

[0031] The placement slot 8 has a fitting slot 13 at the end away from the hook slot 7. When the hook 10 needs to be completely retracted, it can be removed from the hook slot 7 and placed entirely into the fitting slot 13. The elastic force of the rubber band 9 will then hold it within the slot, achieving deeper storage and further reducing the overall profile of the instrument.

[0032] Working principle and process: The surgeon first installs the traction cap on the tip of the endoscope. After the endoscope reaches the surgical area, the surgeon pushes the push-pull plate 2 with their fingers, causing it to extend along the cross groove 5, thereby sending the entire hook assembly to the vicinity of the target traction position. The extension length of the push-pull plate 2 is fixed by the cooperation of the limiting rod 6 and the limiting groove 12.

[0033] Subsequently, the surgeon inserts a standard grasping forceps or similar instrument through the instrument channel of the endoscope. Under direct vision, the forceps are manipulated to grip the rubber sleeve 11 at the end of the hook 10. Then, the hook portion of the hook 10 is gently pulled out of the hook groove 7, and the forceps are manipulated to hook the hook 10 onto the mucosal tissue that needs to be pulled. After hooking, the forceps are released, at which point the elastic recoil force of the rubber band 9 will generate a continuous, gentle traction force on the tissue, thereby exposing the surgical field.

[0034] After traction is completed, the rubber sleeve 11 can be gripped again with forceps to remove the hook 10 from the tissue and put it back into the hook groove 7 or into the sleeve groove 13. Finally, the push-pull plate 2 can be retracted to proceed to the next operation or to remove the endoscope.

[0035] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

[0036] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. An endoscope retractable hook traction cap, comprising a traction cap body (1), characterized in that: At least one push-pull plate (2) is slidably mounted on the main body (1) of the traction cap. A slider (3) is fixedly mounted on one end of the push-pull plate (2), and a pair of auxiliary limiting blocks (4) are fixedly mounted on the slider (3). A cross groove (5) adapted to the slider (3) and the auxiliary limiting blocks (4) is provided on the main body (1) of the traction cap. The slider (3) and the pair of auxiliary limiting blocks (4) are slidably disposed inside the cross groove (5). A pair of placement grooves (8) are provided on the lower wall of the push-pull plate (2), and a hook groove (7) is provided at one end of the placement groove (8). A rubber band (9) is installed inside the placement groove (8). A hook (10) is installed at one end of the rubber band (9) away from the inside of the placement groove (8). The hook (10) is limited and hung in the hook groove (7). A rubber sleeve (11) is installed at the end of the hook (10). A limiting rod (6) is hinged inside the main body (1) of the traction cap. Several limiting grooves (12) are opened on the slider (3). A reserved space is opened inside the main body (1) of the traction cap for the limiting rod (6) to move. The limiting rod (6) can be selectively engaged with different limiting grooves (12) by rotation.

2. The retractable hook-shaped traction cap for endoscopes according to claim 1, characterized in that... The number of push-pull plates (2) is one or a pair. When there is a pair of push-pull plates (2), they are symmetrically distributed and installed on the main body (1) of the pull cap.

3. The retractable hook-shaped traction cap for endoscopes according to claim 1, characterized in that... The placement groove (8) has a set groove (13) at one end away from the crochet groove (7) for storing the rubber band (9) and the crochet hook (10).

4. The retractable hook-shaped traction cap for endoscopes according to claim 1, characterized in that... The cross-sectional shape of the cross groove (5) is adapted to the combined cross-sectional shape of the slider (3) and a pair of auxiliary limiting blocks (4) to restrict the slider (3) from rotating in the horizontal plane.

5. The retractable hook traction cap for endoscopes according to claim 1, characterized in that... The hook (10) is made of elastic metal material and is straight or pre-bent in its natural state.

6. The retractable hook-shaped traction cap for endoscopes according to claim 1, characterized in that... The rubber sleeve (11) covers the end hook of the hook (10).

7. The retractable hook traction cap for endoscopes according to claim 1, characterized in that... The limiting rod (6) is hinged to the inside of the traction cap body (1) by a rotating shaft, and maintains the engagement tendency with the limiting groove (12) by its own weight or the elastic force of the elastic reset component.

8. The retractable hook-shaped traction cap for endoscopes according to claim 1, characterized in that... This traction cap is suitable for endoscopic submucosal dissection (ESD).

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