A continuous firing disposable anorectal ligator

Abstract

The utility model belongs to the technical field of medical apparatus and instruments, provide a kind of disposable use anorectal ligation device of continuous firing, including handle shell, inner tube, push tube, ligation rod, firing assembly, limiting component and negative pressure component.Limiting component includes tooth cover, compression spring and limit ring.After firing assembly is fired, drive push tube whole body moves forward, the pushing distance of push tube can change each time, and then the distance continuous change of flared tube port and suction head port can be controlled, so the elastic coil on suction head can be continuously pushed out, continuous firing is realized.This operation only needs to continuously pull firing assembly, compared with prior art, operation is very simple.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a continuously firing disposable anorectal ligation device. Background Technology

[0002] Disposable rectal ligation devices are widely used in hemorrhoid surgery. Common ligation devices are gun-shaped, consisting of a shell, an inner tube, and an outer tube. The inner tube is fixed in position, and the outer tube is moved by driving it. By switching different settings, the distance between the end of the outer tube and the end of the inner tube changes, thereby allowing the elastic coils fitted onto the end of the inner tube one by one to fit onto hemorrhoids individually, or to fit multiple elastic coils onto a single hemorrhoid.

[0003] For example, the disposable rectal ligator disclosed in application number 202111653091.5 adopts the above principle and uses a gear slider structure. By rotating the gear lever, the gear slider changes the limiting groove of different lengths to control the firing position, thereby realizing the function of triggering different gear spring coils. Therefore, each time it is fired, the gear lever needs to be manually rotated to form a limiting groove of different lengths, which shows that the operation is not convenient enough and cannot achieve continuous firing. Utility Model Content

[0004] In view of the above problems, the purpose of this utility model is to provide a continuously firing disposable rectal ligator, which aims to solve the technical problem that existing disposable rectal ligators cannot fire continuously.

[0005] The present invention adopts the following technical solution:

[0006] The continuously firing disposable rectal ligator includes a handle housing, an inner tube, a push tube, ligating rods, a firing assembly, a limiting assembly, and a negative pressure assembly. The firing assembly drives the push tube forward. Multiple ligating rods are present, each with an elastic coil extending from it. The elastic coil is fitted onto an suction head at the end of the inner tube. The push tube has a flared end with an inner diameter matching the outer diameter of the suction head. The limiting assembly includes a toothed sleeve fitted onto the push tube, a compression spring, and a limiting ring. The limiting ring limits… Located on the handle housing, the front part of the handle housing has a baffle. Under the force of the compression spring, the toothed sleeve and the baffle are separated by a gap. The toothed sleeve includes an inner toothed ring and an outer toothed ring. The number of tooth grooves on the inner and outer toothed rings is the same. The tooth grooves on the outer toothed ring are of the same depth. The tooth grooves on the inner toothed ring are arranged in two sets and are centrally symmetrically paired. The tooth grooves in the same set on the inner toothed ring gradually change in depth. The tooth grooves on the inner and outer toothed rings are offset. The inner wall of the handle housing is provided with an outer pointed strip corresponding to the outer toothed ring, and the outer wall of the push tube is provided with an inner pointed strip corresponding to the inner toothed ring.

[0007] Furthermore, the toothed sleeve has an outer sleeve at one end different from the outer toothed ring, one end of the compression spring is located inside the outer sleeve, an inner sleeve is formed between the inner toothed ring and the outer toothed ring, and the inner pointed strip portion is located inside the inner sleeve.

[0008] Furthermore, the firing assembly includes a front block and a rear block integrally formed with the push tube, and also includes a push frame located between the front block and the rear block. The bottom of the push frame is integrally formed with a firing switch, and the internal space height of the push frame is greater than the diameter of the push tube.

[0009] Furthermore, the top of the push frame has a pin, and a tension spring is connected to the pin. The tension spring is used to connect to the handle housing.

[0010] Furthermore, the front block has slide bars on both sides, the inner wall of the handle housing has corresponding slide grooves, the inner wall of the handle housing also has an arc groove, and the two ends of the pin are located in the arc groove on the same side.

[0011] Furthermore, the inner wall of the handle housing also has a slot, and the tail end of the inner tube has an annular groove that matches the slot, the annular groove being located within the slot.

[0012] Furthermore, the negative pressure assembly includes a connecting joint and an air tube, with the tail end of the inner tube inserted into the connecting joint.

[0013] The beneficial effects of this utility model are as follows: This utility model, through the design of the limiting component structure, including deflecting inner and outer toothed rings, as well as inner and outer pointed bars, drives the firing component to move the entire push tube forward, achieving continuous firing. Because the depth of the inner toothed ring groove continuously changes, the pushing distance of the push tube changes with each firing, thereby controlling the continuous change of the distance between the flared tube port and the suction head port. Therefore, the elastic coil on the suction head can be continuously pushed out, achieving continuous firing. This operation only requires continuously pulling the firing component, making it much simpler than existing methods. Attached Figure Description

[0014] Figure 1 This is a diagram of the internal structure of the ligation device provided by this utility model.

[0015] Figure 2 This is a structural diagram of the front end of the ligation device provided by this utility model.

[0016] Figure 3 This is a cross-sectional view of the front end of the ligation device provided by this utility model.

[0017] Figure 4 This is a structural diagram of the limiting component provided by this utility model.

[0018] Figure 5 This is a cross-sectional view of the limiting component provided by this utility model.

[0019] Figure 6 This is a structural diagram of the toothed sleeve provided by this utility model.

[0020] Figure 7 This is a structural diagram showing the position of the firing assembly provided by this utility model. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model patent clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0022] To illustrate the technical solution described in this utility model, specific embodiments are described below.

[0023] For ease of explanation, only the parts relevant to the embodiments of this utility model are shown.

[0024] Combination Figure 1 As shown, the continuously firing disposable rectal ligator includes a handle housing 1 (only the lower housing is shown in the illustration; the upper housing structure is basically the same as the lower housing), an inner tube 2, a push tube 3, ligating rods 4, a firing assembly 5, a limiting assembly 6, and a negative pressure assembly 7. The firing assembly 5 drives the push tube 3 forward. There are multiple ligating rods 4; four are shown in the illustration. Figure 2 , 3 As shown, the tying rod 4 has an elastic coil 41 extending out, and the elastic coil 41 is sleeved on the suction head 21 at the end of the inner tube 2. The end of the push tube 3 is a flared tube 31, and the inner diameter of the flared tube 31 matches the outer diameter of the suction head 21.

[0025] Combination Figure 4-6As shown, the limiting component 6 includes a toothed sleeve 61, a compression spring 62, and a limiting ring 63 fitted onto the push tube. The limiting ring 63 limits the movement of the handle housing 1. The front part of the handle housing 1 has a baffle 10. Under the force of the compression spring 62, a gap exists between the toothed sleeve 61 and the baffle 10. The toothed sleeve 61 includes an inner toothed ring 611 and an outer toothed ring 612. The inner and outer toothed rings have the same number of tooth grooves, shown as eight in the figure. The tooth grooves of the outer toothed ring 612 have a uniform depth. The inner toothed ring 611 has two sets of tooth grooves arranged in a centrally symmetrical pair. The depth of the tooth grooves in the same group of inner toothed rings 611 gradually changes. The tooth grooves of the inner toothed ring 611 and the outer toothed ring 612 are offset. An outer pointed strip 11 is provided on the inner wall of the handle housing 1 corresponding to the outer toothed ring, and an inner pointed strip 32 is provided on the outer wall of the push tube 3 corresponding to the inner toothed ring. As a specific structure, further shown in the figure, the toothed sleeve 61 has an outer sleeve 613 formed at one end different from the outer toothed ring 612, one end of the compression spring 62 is located inside the outer sleeve 613, an inner sleeve 614 is formed between the inner toothed ring 611 and the outer toothed ring 612, and the inner pointed strip 32 is partially located inside the inner sleeve 614.

[0026] The push tube 3 is equipped with a snap-fit ​​device located on the outside of the handle housing, and four strapping rods are snapped into the slots of the snap-fit ​​device. Elastic wires are threaded through the strapping rods, with the ends of the elastic wires forming slipknotted elastic coils. All the elastic coils are arranged and fitted onto the suction head, with the suction head protruding from the flared tube, which simultaneously limits the movement of the elastic coils. The gap between the flared tube and the suction head is very small, preventing the elastic coils from entering.

[0027] The usage instructions for this product are as follows:

[0028] 1. Connect the 6mm-9mm inner diameter negative pressure suction tube to the negative pressure assembly on the ligator handle (connect the end of the handle). The negative pressure source is connected to the ligator through the negative pressure suction tube; keep it closed initially. In the diagram, the negative pressure assembly 7 includes a connecting joint 71 and an air tube 72. The end of the inner tube 2 is inserted into the connecting joint 71. The end of the air tube 72 is connected to the negative pressure suction tube.

[0029] 2. Disinfect the skin around the anal canal, insert the dilator (used with this product) into the rectoscope, lubricate the dilator and rectoscope, and then insert the dilator and rectoscope into the anal canal.

[0030] 3. Rotate the dilator to dilate the anal canal, then remove the dilator while keeping the proctoscope in place.

[0031] 4. Adjust the position of the proctoscope so that its notch is aligned with the area to be ligated, and insert the ligation device through the proctoscope.

[0032] 5. Make full contact between the suction head of the ligator and the area to be ligated (such as hemorrhoids), turn on the negative pressure to -80kPa±2kPa, maintain the negative pressure, and suck the area to be ligated into the suction head.

[0033] 6. Maintain negative pressure and slowly fire the firing component of the ligator until the tension is released. This will release the outermost elastic coil and place it on the area that needs ligation.

[0034] 7. Stretch the end of the ligating rod to tighten the ligating coil, then cut the ligating thread with surgical scissors 2-5mm away from the elastic coil and remove the current ligating rod.

[0035] 8. Then release the negative pressure and slowly remove the suction head from the bandaged area.

[0036] 9. If more elastic coils need to be fired, the above ligation process can be repeated.

[0037] 10. After completing all ligation procedures, remove the ligator and rectoscope. Visually inspect the mucosa at the ligation site; it should be secured by the ligation thread on the rubber band, and the ligation should not come undone.

[0038] 11. The ligation coil usually falls off in 7-14 days. The specific time of fall-off depends on the surgical situation and individual physical condition, and needs to be judged by the clinician.

[0039] The key structural feature of this design lies in the process of releasing the elastic coils one by one.

[0040] This structure enables the continuous rotation of the drive sleeve 61 through the continuous triggering firing component 5. The surface of the sleeve 61 has gear positions numbered 1-4, and there is a small window 16 on the handle housing 1 aligned with the surface of the sleeve 61, through which the current release coil position can be observed.

[0041] Initially, the inner pointed bar 32 is aligned with the inclined surface of the tooth groove of the inner gear ring 611. Under the force of the compression spring 62, the outer pointed bar abuts against the root of the tooth groove of the outer gear ring 612. Upon the first firing, the inner pointed bar 32 contacts the inclined surface of the tooth groove and pushes the toothed sleeve 61 forward until the tooth groove of the outer gear ring 612 disengages from the outer pointed bar. During this pushing process, under the force of the contact between the inclined surface of the tooth groove of the inner gear ring 611 and the inner pointed bar 32, the toothed sleeve rotates a certain angle until the inner pointed bar 32 abuts against the root of the tooth groove of the inner gear ring 611. At this point, the outer pointed bar 11 aligns with the inclined surface of the next tooth groove of the outer gear ring 612. After release, under the force of the compression spring, the toothed sleeve rotates back to its initial position (at this point, the toothed sleeve has rotated one tooth groove angle). The outer pointed bar then abuts against the root of the tooth groove of the outer gear ring 612 again, while the inner pointed bar 32 aligns with the inclined surface of the next tooth groove. This allows for continuous firing.

[0042] Because the groove depth of the internal gear ring 611 is continuously changing (for example, the root of the groove gradually increases), and because the inner pointed bar 32 pushes the toothed sleeve 61 forward (while rotating) with each firing until the toothed sleeve 61 abuts against the baffle (initially, there is a gap between the baffle and the toothed sleeve), and because the groove depth of the internal gear ring 611 is changing, the travel distance of the inner pointed bar 32 also changes with each firing, meaning the travel distance of the pusher sleeve 3 changes with each firing. Since the positions of the inner tube 2 and the suction head 21 are fixed, the distance between the port of the flared tube 31 and the port of the suction head 21 changes with each firing. In this embodiment, the port distance decreases with each firing, thus allowing the outermost coil to be pushed out, achieving continuous coil release.

[0043] In this embodiment, as Figure 7 As shown, the firing assembly 5 includes a front block 32 and a rear block 33 integrally formed with the push tube 3, and a push frame 34 located between the front block 32 and the rear block 33. A firing switch 35 is integrally formed at the bottom of the push frame 34. The internal height of the push frame 34 is greater than the diameter of the push tube 3, allowing the push frame 34 to rotate freely without interfering with the push tube 3 when the firing switch 35 is pulled. In the figure, the top of the push frame 34 has a pin 36, on which a tension spring 37 is connected. The tension spring 37 is used to connect to the handle housing 1. When the spring 37 is activated, the firing assembly and the push tube can return to their original positions after the firing switch 35 is released. The handle housing 1 has a rotating hole 12, and the firing switch 35 has a short post 351 located in the rotating hole 12, forming a rotation limit and providing rotational support force.

[0044] To ensure stable movement of the push tube 3 without deflection, the front block 32 has slide bars 321 on both sides, and the inner wall of the handle housing 1 has corresponding grooves 13, with the slide bars 321 located within the grooves 13. The inner wall of the handle housing 1 also has an arc-shaped groove 14, with both ends of the pin 36 located within the arc-shaped groove 14 on the same side. When the firing switch 35 rotates around the short post 351, the push frame 34 above it also rotates. The arc-shaped groove 14 and the pin 36 follow the same rotation path, providing rotation limit and ensuring stability.

[0045] Finally, the inner wall of the handle housing 1 also has a slot 15 (such as...). Figure 1 As shown, the tail end of the inner tube 2 has an annular groove 22 that matches the slot 15, and the annular groove 22 is located within the slot 15. Since the position of the inner tube 2 is fixed, this structure locks the tail end of the inner tube within the slot 15, thus achieving a limiting position.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A continuously firing disposable rectal ligator, comprising a handle housing, an inner tube, a push tube, ligating rods, a firing assembly, a limiting assembly, and a negative pressure assembly, wherein the firing assembly drives the push tube to move forward, multiple ligating rods are provided, each ligating rod has an elastic coil extending from it, the elastic coil is fitted onto an adsorption head at the end of the inner tube, and the end of the push tube is a flared tube, the inner diameter of which matches the outer diameter of the adsorption head, characterized in that: The limiting component includes a toothed sleeve, a compression spring, and a limiting ring fitted onto the push tube. The limiting ring limits the movement to the handle housing. The front part of the handle housing has a baffle. Under the force of the compression spring, a gap is left between the toothed sleeve and the baffle. The toothed sleeve includes an inner toothed ring and an outer toothed ring. The inner and outer toothed rings have the same number of tooth grooves. The tooth grooves of the outer toothed ring have the same depth. The tooth grooves of the inner toothed ring are arranged in two sets and are centrally symmetrically paired. The tooth groove depth of the same set of inner toothed rings gradually changes. The tooth grooves of the inner and outer toothed rings are offset. The inner wall of the handle housing is provided with an outer pointed strip corresponding to the outer toothed ring, and the outer wall of the push tube is provided with an inner pointed strip corresponding to the inner toothed ring.

2. The continuously firing disposable rectal ligator as described in claim 1, characterized in that: The toothed sleeve has an outer sleeve at one end different from the outer toothed ring, one end of the compression spring is located inside the outer sleeve, an inner sleeve is formed between the inner toothed ring and the outer toothed ring, and the inner pointed strip is located inside the inner sleeve.

3. The continuously firing disposable rectal ligator as described in claim 2, characterized in that: The firing assembly includes a front block and a rear block integrally formed with the push tube, and a push frame located between the front block and the rear block. The bottom of the push frame is integrally formed with a firing switch, and the internal space height of the push frame is greater than the diameter of the push tube.

4. The continuously firing disposable rectal ligator as described in claim 3, characterized in that: The top of the push frame has a pin, and a tension spring is connected to the pin. The tension spring is used to connect to the handle housing.

5. The continuously firing disposable rectal ligator as described in claim 4, characterized in that: The front block has slide bars on both sides, the inner wall of the handle housing has corresponding slide grooves, the inner wall of the handle housing also has an arc groove, and the two ends of the pin are located in the arc groove on the same side.

6. The continuously firing disposable rectal ligator as described in claim 5, characterized in that: The inner wall of the handle housing also has a slot, and the tail end of the inner tube has an annular groove that matches the slot, and the annular groove is located inside the slot.

7. The continuously firing disposable rectal ligator as described in claim 6, characterized in that: The negative pressure assembly includes a connector and an air tube, with the tail end of the inner tube inserted into the connector.

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