Breakable wire ligation loop ligator barrel and hemorrhoid ligation loop ligator

Abstract

The application belongs to the field of medical devices, and particularly relates to a breakable thread type ligation gun barrel for hemorrhoid ligation device and a hemorrhoid ligation device. The cylindrical sleeve is provided with a through thread hole, and a gap is formed between the cylindrical sleeve and the barrel. The upper surface of the barrel is provided with a cutting installation part, and the end of the barrel near the cylindrical sleeve is provided with a cutter hole communicated with the cutting installation part. The barrel is further provided with a second thread hole for the elastic thread to pass through, and a elastic thread holder is arranged at the tail of the barrel. The barrel is further provided with a thread outlet hole communicated with the second thread hole at the front side of the elastic thread holder. The barrel further comprises a cutting push rod which is connected to the cutting installation part and extends to the tail of the barrel. The front end of the cutting push rod is fixed with a cutter which is arranged in the cutter hole. The tail of the cutting push rod is provided with a gap slot for the elastic thread holder. The barrel of the ligation gun is improved, the integration of the cutting assembly and the barrel is realized, and the structure of the barrel is simplified.

Description

Technical Field

[0001] This invention belongs to the field of medical devices, and specifically relates to a disconnectable ligator barrel for hemorrhoid ligation and a hemorrhoid ligation device. Background Technology

[0002] The rectal ligation stapler is a medical device that replaces traditional manual suturing. Thanks to advancements in modern technology and improved manufacturing techniques, clinically used staplers offer advantages over traditional manual ligation techniques, including reliable quality, ease of use, faster suturing speed, and fewer side effects and surgical complications. They also enable the surgical removal of previously inoperable tumors. Its main working principle involves using elastic rubber rings or other materials to sever or anastomose diseased tissue, causing the tissue to bleed, die, and eventually slough off naturally. This effectively treats various localized lesions and prevents the spread of disease. To improve the efficiency of ligation surgery and reduce patient medical costs, the inventors have developed and invented various ligation structures for automated ligation operations. These products are highly adaptable, effective, and have received positive market feedback.

[0003] Existing technology, Chinese patent CN113729872A, invention title: "An Automatic Thread Cutting Device for a Bandaging Device," adds a cutting device externally attached to the lower part of the existing bandaging device barrel. This device increases the size of the bandaging device barrel, which may cause many inconveniences during use. Another Chinese patent: CN202120646294.0, invention title: "A Hemorrhoid Bandaging Device Barrel with an Elastic Thread Cutting Device," has a pad nozzle at the front end of the barrel. As can be seen from the accompanying drawings, the pad nozzle protrudes from the front end of the barrel. When the tissue is sucked up by negative pressure at the end of the barrel, there is a certain amount of compression between the pad nozzle and the tissue, which may affect the sealing between the barrel and the tissue, and thus may result in the barrel being unable to suck up the tissue. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention improves the ligation gun barrel, integrating the cutting component with the gun barrel, simplifying the barrel structure, and overcoming the structural instability and potential obstruction of surgical angles inherent in external cutting devices in existing technologies.

[0005] The technical solution of the present invention is as follows:

[0006] A cut-off ligator barrel includes a tube body with a connecting part that connects to the ligator cavity. The front end of the tube body has a cylindrical sleeve for attaching an elastic cord. A negative pressure line is axially arranged inside the tube body, communicating with the inner cavity of the cylindrical sleeve. The cylindrical sleeve has a through-hole for threading, and there is a gap between the cylindrical sleeve and the tube body. The upper surface of the tube body has a cutting mounting part. The end of the tube body near the cylindrical sleeve has a cutting hole communicating with the cutting mounting part. The tube body also has a second threading hole for the elastic cord to pass through. An elastic cord retainer is located at the rear of the tube body. An outlet hole communicating with the second threading hole is located on the tube body in front of the elastic cord retainer. The barrel also includes a cutting push rod that is fitted into the cutting mounting part and extends to the rear of the tube body. A cutter is fixed to the front end of the cutting push rod, and the cutter is arranged in a cutting hole. The rear end of the cutting push rod has a clearance groove for the elastic cord retainer.

[0007] Furthermore, the front end face of the cylindrical sleeve is provided with a sealing ring, and the outer diameter of the sealing ring is smaller than the outer diameter of the cylindrical sleeve.

[0008] Furthermore, the tail end of the tube is provided with a reinforcing ring plate, and the reinforcing ring plate is provided with a through hole for the cutting push rod to pass through.

[0009] Furthermore, the tube body has guide steps formed on both sides of the elastic retainer, the guide steps extend to the tail of the tube body, and the relief groove divides the tail of the cut-off push rod into a first push rod and a second push rod, the first push rod and the second push rod respectively cooperate on the guide steps.

[0010] Furthermore, the sides of the guide steps are all provided with limiting protrusions.

[0011] Furthermore, it also includes a limiting clamp, which includes a clamping body with an open clamping cavity. The cutting push rod and the guide step are clamped in the clamping cavity, and one end of the clamping body abuts against the side end face of the guide step.

[0012] Furthermore, the elastic cord retainer includes a retaining clamp that is integral with or separate from the tube body. The retaining clamp is provided with a retaining groove for accommodating the drive end of the elastic cord, and the retaining groove is inclined.

[0013] Furthermore, the cutting and mounting part is a blind mounting hole provided on the pipe body.

[0014] Furthermore, the cutting and mounting part is a mounting groove provided on the pipe body.

[0015] Furthermore, the connecting part consists of connecting protrusions symmetrically arranged on the surface of the tube.

[0016] A hemorrhoid ligation device, including a ligation device gun body, characterized in that: it includes the above-mentioned disconnectable ligation device gun barrel, the gun barrel being connected to the ligation device gun body.

[0017] In summary, the present invention has the following beneficial effects:

[0018] 1. This invention improves the structure of the ligation gun barrel by forming a second threading hole for placing the elastic cord and a cutting installation part on the barrel body, realizing that the elastic cord and the cutter are built into the gun barrel, simplifying the external structure of the ligation gun barrel, avoiding the problem that the complex external structure of the ligation gun barrel affects the use of the gun barrel, and at the same time, overcoming the problem that the external structure obstructs the surgical view.

[0019] 2. Furthermore, the present invention provides a sealing ring at the end of the round sleeve, which has a better contact area with the tissue, thus giving the ligator better sealing performance and avoiding the failure of the ligator to absorb tissue during the operation. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of Embodiment 1 of the present invention;

[0021] Figure 2 for Figure 1 A cross-sectional view;

[0022] Figure 3 This is a three-dimensional schematic diagram of Embodiment 2 of the present invention;

[0023] Figure 4 for Figure 3 A cross-sectional view;

[0024] Figure 5 A three-dimensional diagram of the gun barrel after the cut-off push rod has been removed;

[0025] Figure 6 A three-dimensional diagram showing the barrel after the push rod has been removed, from another perspective;

[0026] Figure 7 A three-dimensional schematic diagram of a hemorrhoid ligation device;

[0027] Figure 8 A three-dimensional schematic diagram of another structure of a hemorrhoid ligation device;

[0028] In the diagram, 1 is the tube body, 10 is the connecting part, 11 is the cylindrical sleeve, 12 is the negative pressure pipeline, 110 is the wire hole, 13 is the gap, 14 is the cutting installation part, 140 is the cutter hole, 15 is the second wire hole, 16 is the elastic rope retainer, 160 is the wire outlet hole, 17 is the cutting push rod, 170 is the cutter, 171 is the clearance groove, 111 is the sealing ring, 141 is the installation groove, 142 is the installation blind hole, 18 is the reinforcing ring plate, 180 is the through hole, 19 is the guide step, 172 is the first push rod, 173 is the second push rod, 190 is the limiting protrusion, 2 is the limiting clamp, 20 is the clamp body, 21 is the clamping cavity, 16 is the elastic rope retainer, 162 is the retaining clamp body, 161 is the retaining groove, 100 is the connecting protrusion, 3 is the hemorrhoid ligator, 30 is the ligator gun body, and 31 is the gun barrel. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0030] It should be noted that when a component is referred to as being "set on" or "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as being "fixed to" another component, or "fixedly connected" to another component, the fixing method can be detachable or non-detachable. When a component is considered to be "connected" or "rotatably connected" to another component, it can be directly connected to the other component or there may be an intermediate component. The terms "vertical," "horizontal," "left," "right," "upper," "lower," and similar expressions used are for illustrative purposes only and do not represent the only possible implementation.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] In this invention, terms such as "first," "second," and "third" are used not to represent specific quantities or orders, but merely to distinguish names.

[0033] Example 1

[0034] See Figure 1 and Figure 2As shown, the barrel of a detachable ligator includes a tube body 1, with a connecting part 10 for connecting to the ligator cavity. The front end of the tube body 1 has a cylindrical sleeve 11 for attaching an elastic cord. A negative pressure conduit 12 is axially arranged inside the tube body 1, communicating with the inner cavity of the cylindrical sleeve 11. The cylindrical sleeve 11 has a through-hole 110, a gap 13 between the cylindrical sleeve 11 and the tube body 1, a cutting and mounting part 14 on the upper surface of the tube body 1, and a part connecting the cutting and mounting part at the end of the tube body 1 near the cylindrical sleeve 11. The tube body 1 is provided with a second threading hole 15 for the elastic cord to pass through, and an elastic cord retainer 16 is provided at the tail of the tube body 1. The tube body 1 in front of the elastic cord retainer 16 is provided with an outlet hole 160 that communicates with the second threading hole. The tube body 1 is also provided with a cutting push rod 17 that is connected to the cutting mounting part 14 and extends to the tail of the tube body. A cutter 170 is fixed at the front end of the cutting push rod 17 and the cutter 170 is arranged in the cutting hole. The tail of the cutting push rod 17 is provided with a clearance groove 171 for the elastic cord retainer.

[0035] In this embodiment, the cutting installation part 14 is a blind hole 142 provided on the tube body. The cutting push rod is inserted and fitted into the blind hole. The blind hole limits the various directions of the cutting push rod, making the movement of the cutting push rod more stable. Moreover, the cutting push rod, the cutter, and the second threading hole are all located inside the tube body, which simplifies the structure of the surface accessories of the gun barrel and avoids the situation where the protruding structure on the surface of the gun barrel affects the ligation surgery angle and surgical position, making it more convenient for users to use.

[0036] The front end face of the cylindrical sleeve 11 is provided with a sealing ring 111, and the outer diameter of the sealing ring 111 is smaller than the outer diameter of the cylindrical sleeve. The small outer diameter of the sealing ring forms a clearance space, avoiding the problem of interference between the elastic cord and the sealing ring when it enters through the thread hole. Furthermore, since the sealing ring is higher than the end face of the cylindrical sleeve, it fits more tightly with the tissue, resulting in a better sealing effect. This overcomes the sealing problem caused by the elastic cord protruding on the end face of the cylindrical sleeve when there is no sealing ring. Preferably, the outer circumferential surface of the sealing ring is an inclined surface. The inclined surface structure design reduces the width of the end face of the sealing ring, allowing the tissue to adhere tightly to the inner and outer sides of the sealing ring, thus improving the sealing effect.

[0037] In this embodiment, the loop of the elastic rope is set on the surface of the cylindrical sleeve, and the other end of the elastic rope passes through the threading hole on the cylindrical sleeve, enters the second threading hole of the tube body through the gap, and finally comes out from the outlet hole. The end of the elastic rope is provided with a pulling component, which is fixedly installed on the elastic rope holder. The elastic rope is in the gap between the threading hole and the second threading hole, and the cutter is aligned with the elastic rope in the gap. People can push the cutting push rod to move by the firing component in the ligator gun body, which pushes the cutter to complete the cutting of the elastic rope.

[0038] Example 2

[0039] See Figures 3 to 4 As shown, the barrel of a detachable ligator includes a tube body 1, with a connecting part 10 for connecting to the ligator cavity. The front end of the tube body 1 has a cylindrical sleeve 11 for attaching an elastic cord. A negative pressure conduit 12 is axially arranged inside the tube body 1, communicating with the inner cavity of the cylindrical sleeve 11. The cylindrical sleeve 11 has a through-hole 110, a gap 13 between the cylindrical sleeve 11 and the tube body 1, a cutting and mounting part 14 on the upper surface of the tube body 1, and a part connecting the cutting and mounting part at the end of the tube body 1 near the cylindrical sleeve 11. The tube body 1 is provided with a second threading hole 15 for the elastic cord to pass through, and an elastic cord retainer 16 is provided at the tail of the tube body 1. The tube body 1 in front of the elastic cord retainer 16 is provided with an outlet hole 160 that communicates with the second threading hole. The tube body 1 is also provided with a cutting push rod 17 that is connected to the cutting mounting part 14 and extends to the tail of the tube body. A cutter 170 is fixed at the front end of the cutting push rod 17 and the cutter 170 is arranged in the cutting hole. The tail of the cutting push rod 17 is provided with a clearance groove 171 for the elastic cord retainer.

[0040] In this embodiment, the cutting installation part 14 is a mounting groove 141 provided on the tube body, and the cutting push rod is embedded in the mounting groove. Compared with Embodiment 1, when using the product of this embodiment, the user can observe the position of the cutter from the outside, and the user can be more intuitive and have better confidence in operation.

[0041] The cylindrical sleeve 11 has a sealing ring 111 on its front end face, and the outer diameter of the sealing ring 111 is smaller than the outer diameter of the cylindrical sleeve. The small outer diameter of the sealing ring creates a clearance space, avoiding interference between the elastic cord and the sealing ring when the cord enters through the thread hole. Furthermore, since the sealing ring is higher than the end face of the cylindrical sleeve, it fits more tightly with the tissue, resulting in a better sealing effect. This overcomes the sealing problem caused by the elastic cord protruding from the end face of the cylindrical sleeve when there is no sealing ring. Preferably, the outer circumferential surface of the sealing ring is an inclined surface. The inclined surface structure design reduces the width of the end face of the sealing ring, allowing the tissue to adhere tightly to the inner and outer sides of the sealing ring, thus improving the sealing effect.

[0042] In the above embodiments, see Figures 1 to 6 As shown, the tail of the tube body 1 is provided with a reinforcing ring plate 18. The reinforcing ring plate 18 is provided with a through hole 180 for the cutting push rod to pass through. The cutting push rod extends through the through hole to the tail of the tube body. When the slinger barrel is connected to the gun body, the cutting push rod is connected to the firing component inside the gun body. The reinforcing ring plate enhances the structural strength of the tail of the barrel and also forms an area that is easy to handle, making it convenient for the operator to use.

[0043] Furthermore, in the above embodiments, see... Figure 5 and Figure 6 As shown, the tube body 1 has guide steps 19 formed on both sides of the elastic retainer 15. The guide steps 19 extend to the tail of the tube body. The relief groove 171 divides the tail of the cutting push rod 17 into a first push rod 172 and a second push rod 173. The first push rod and the second push rod are respectively engaged on the guide steps. With the above structure, the end of the cutting push rod can extend to the tail of the tube body. The first push rod and the second push rod are symmetrically arranged. In cooperation with the guide steps, the movement of the first push rod and the second push rod is guided. Since there is a stepped part between the guide steps and the tube body, the stroke of the cutting push rod can also be limited.

[0044] Furthermore, in the above embodiments, see... Figure 5 and Figure 6 As shown, the sides of the guide step 19 are all provided with limiting protrusions 190. The limiting protrusions play a blocking role. When the force applied by the firing component in the gun body is insufficient, the cutting push rod is not easily fired, thus avoiding the problem of the sling malfunctioning in the unused state due to accidental firing.

[0045] To elaborate further, see Figure 1 and Figure 3 As shown, in the above embodiment, a limiting clamp 2 is also included. The limiting clamp 2 includes a clamping body 20, and the clamping body 20 is provided with an open clamping cavity 21. The cutting push rod 17 and the guide step 19 are clamped in the clamping cavity, and one end of the clamping body 20 abuts against the side end face of the guide step 19. Here, the added limiting clamp achieves a physical limitation, so that the cutting push rod cannot move forward and therefore cannot be fired, avoiding the possibility of accidental firing. Only when the limiting clamp is removed can the cutting push rod be pushed. Furthermore, the upper end face of the cutting push rod is also provided with a positioning protrusion, and the inner wall of the clamping cavity is provided with a positioning hole that cooperates with the positioning protrusion. When the limiting clamp is stuck on the cutting push rod and the guide step, and the end face of the clamping body abuts against the side end face of the guide step, the limiting clamp hinders the movement of the cutting push rod, and the cutting action cannot be fired.

[0046] Furthermore, in the above embodiments, participants Figure 6 As shown, the elastic cord retainer 16 includes a retaining clamp 162 that is integral with or separate from the tube body. The retaining clamp is provided with a retaining groove 161 for accommodating the driving end of the elastic cord, and the retaining groove is inclined. In this embodiment, the retaining clamp adopts a separate structural design. The tube body is provided with an installation groove, and the retaining clamp is embedded in the installation groove. The separate structural design simplifies the structure of the parts, facilitates processing and manufacturing, and effectively controls the manufacturing cost.

[0047] In the above embodiments, the connecting part 10 consists of connecting protrusions symmetrically arranged on the surface of the tube. The gun body assembly of the ligator is provided with a locking groove that cooperates with the connecting protrusion. The connecting protrusion is first inserted into the locking groove along the axial direction, and then rotated along the circumferential direction to achieve the purpose of locking. This realizes the quick connection between the gun barrel and the ligator cavity, and also provides the possibility of gun barrel replacement.

[0048] A hemorrhoid ligation device, including a ligation device gun body 30, is characterized in that: it includes the aforementioned disconnectable ligation device gun barrel 31, the gun barrel 31 being connected to the ligation device gun body 30, see [reference]. Figure 7 As shown in the diagram, the ligation gun body is an external negative pressure source ligation gun body. The external negative pressure source is connected to the connector at the lower end of the ligation gun body. The external negative pressure source creates negative pressure at the end of the ligation gun barrel through the air passage, drawing the hemorrhoid tissue into the end of the ligation gun barrel. Then, one end of the elastic cord on the elastic cord holder is manually pulled, causing the other end of the elastic cord to slide off the ligation gun barrel and be looped around the base where the hemorrhoid tissue connects to the body. The firing mechanism on the ligation gun body drives the cutter to complete the cutting action of the elastic cord; see also Figure 8 As shown in the diagram, the ligator gun body is a multi-purpose ligator gun body. The multi-purpose ligator gun body can be connected to an external negative pressure source or can generate negative pressure through its own negative pressure generator to provide negative pressure for the operation of the ligator. When the negative pressure is generated by its own negative pressure generator, the person drives the long firing handle on the gun body. The long firing handle drives the negative pressure generator to work, forming negative pressure at the end of the ligator gun barrel, which draws the hemorrhoid tissue into the end of the ligator gun barrel. Then, the person manually pulls one end of the elastic cord on the elastic cord holder, causing the other end of the elastic cord to slide off the ligator gun barrel and be tied at the root of the connection between the hemorrhoid tissue and the human body. Then, the person drives the short firing handle on the gun body. The short firing handle drives the cutter on the gun barrel to cut the elastic cord.

[0049] In summary, the present invention has the following beneficial effects:

[0050] 1. This invention improves the structure of the ligation gun barrel by forming a second threading hole for placing the elastic cord and a cutting installation part on the barrel body, realizing that the elastic cord and the cutter are built into the gun barrel, simplifying the external structure of the ligation gun barrel, avoiding the problem that the complex external structure of the ligation gun barrel affects the use of the gun barrel, and at the same time, overcoming the problem that the external structure obstructs the surgical view.

[0051] 2. Furthermore, the present invention provides a sealing ring at the end of the round sleeve, which has a better contact area with the tissue, thus giving the ligator better sealing performance and avoiding the failure of the ligator to absorb tissue during the operation.

[0052] Based on the described 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.

Claims

1. A disconnectable ligator barrel, comprising a tube body, a connecting portion at the rear end of the tube body for connection with a ligator cavity, a cylindrical sleeve for attaching an elastic cord at the front end of the tube body, and a negative pressure pipeline axially arranged inside the tube body, the negative pressure pipeline communicating with the inner cavity of the cylindrical sleeve, characterized in that: The cylindrical sleeve has a through-hole for threading, and there is a gap between the cylindrical sleeve and the tube body. The upper surface of the tube body has a cutting and mounting part, and the end of the tube body near the cylindrical sleeve has a cutting hole communicating with the cutting and mounting part. The tube body also has a second threading hole for the elastic cord to pass through, and the gap communicates with the second threading hole. An elastic cord retainer is provided at the tail of the tube body, and an outlet hole communicating with the second threading hole is provided on the tube body in front of the elastic cord retainer. The other end of the elastic cord passes through the threading hole of the cylindrical sleeve, enters the second threading hole of the tube body through the gap, and comes out from the outlet hole to connect with the elastic cord retainer. The cutting hole and The elastic cord alignment within the gap also includes a cutting push rod that is connected to the cutting mounting part and extends to the tail of the tube. A cutter is fixed at the front end of the cutting push rod and arranged in a cutter hole. The tail of the cutting push rod is provided with a clearance groove for the elastic cord retainer. The tail of the tube is provided with a reinforcing ring plate with a through hole for the cutting push rod to pass through. Guide steps are formed on both sides of the elastic cord retainer of the tube. The guide steps extend to the tail of the tube. The clearance groove divides the tail of the cutting push rod into a first push rod and a second push rod, which are respectively fitted onto the guide steps.

2. The disconnectable ligature barrel according to claim 1, characterized in that: The cylindrical sleeve has a sealing ring on its front end face, and the outer diameter of the sealing ring is smaller than the outer diameter of the cylindrical sleeve.

3. The disconnectable ligator barrel according to claim 1, characterized in that: The sides of the guide steps are all provided with limiting protrusions.

4. The disconnectable ligator barrel according to claim 3, characterized in that: It also includes a limiting clamp, which includes a clamping body with an open clamping cavity. The cutting push rod and the guide step are clamped in the clamping cavity, and one end of the clamping body abuts against the side end face of the guide step.

5. The disconnectable ligator barrel according to claim 1, characterized in that: The elastic rope retainer includes a retaining clamp that is integral with or separate from the tube body. The retaining clamp is provided with a retaining groove for accommodating the driving end of the elastic rope, and the retaining groove is inclined.

6. The disconnectable ligature barrel according to any one of claims 1-5, characterized in that: The cutting and mounting part is a blind hole or mounting groove provided on the pipe body.

7. The disconnectable ligator barrel according to claim 1, characterized in that: The connecting part consists of connecting protrusions symmetrically arranged on the surface of the tube.

8. A hemorrhoid ligation device, including a ligation device gun body, characterized in that: It includes the disconnectable ligator barrel as described in any one of claims 1 to 7, the barrel being connected to the ligator body.

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