A double loop holding structure for radioactive seed implantation gun

Abstract

The application relates to a radioactive seed implantation gun with a double-ring holding structure, which comprises a main body, a screw joint, a clamping joint, an upper circular ring handle, a thimble, a lower circular ring handle, a connecting column and a particle clip. The main body is in a cylindrical structure and is internally provided with a circular hole penetrating through the front and back ends along a first axis, the screw joint is fixedly connected to the front end of the main body, the upper circular ring handle is composed of a first circular ring and a rear guide pipe and is fixedly connected to the rear end of the main body through the rear guide pipe, the screw joint and the rear guide pipe are both hollow structures and the shafts of the two are on the first axis, forming a particle pushing channel. The lower circular ring handle is composed of a second circular ring and a handle and is a fully-closed structure, is fixedly connected to the lower side of the main body through the connecting column, and the right side of the handle is provided with an arc-shaped recess. The first circular ring and the second circular ring are coplanar and symmetrical. The upper circular ring handle and the lower circular ring handle jointly form the double-ring holding structure, and when a single hand holds, a triangular support is formed, hand fatigue is reduced and holding stability is enhanced.

Description

Technical Field

[0001] This invention relates to the field of radiotherapy, and more particularly to a medical radioactive seed implantation gun. Background Technology

[0002] As an important minimally invasive treatment for malignant tumors, radioactive particle brachytherapy, with its core technology carrier 125I radioactive particles, has shown unique advantages in the clinical treatment of solid tumors due to its moderate half-life and precise and controllable radiation range.

[0003] Currently, particle implantation primarily relies on doctors manually operating the implantation gun to deliver the particles along a hollow implantation needle to the target area. This device uses a push-pull mechanism to deliver the particles stored in the magazine along the hollow implantation needle. During use, the grip method and the smoothness of particle delivery after magazine insertion significantly affect the implantation outcome. Better grip and dexterity make it more suitable for particle implantation in different positions and angles; a simpler structure and more precise magazine positioning result in better feel and smoother particle delivery, leading to higher implantation efficiency, a higher success rate, no jamming, and accurate implantation placement.

[0004] There are generally two existing technologies. One is a single-ring structure radioactive seed implantation gun (ZL202220185274.2). The drawback is that the single-ring structure has a limited grip method and is not easy to operate when changing the implantation angle. Moreover, the seed magazine positioning method has the risk of poor positioning, especially when the magazine is not tightened, it is impossible to accurately locate the implantation needle channel, resulting in unsmooth seed delivery.

[0005] Another type is the radioactive seed implantation gun (ZL202021278200.0), which has the drawback that the cylindrical or square grip can only be pinched or grasped with the fingers and cannot form a stable support in the hand. Moreover, it also has the same risk of magazine misalignment as the first technology.

[0006] There are two main types of implantation needle tailstock structures: threaded tailstock and cylindrical tailstock. Both types of radioactive seed implantation guns can only be used with threaded tailstock implantation needles and cannot be used with cylindrical tailstock implantation needles, thus limiting their applicability. Summary of the Invention

[0007] To address the aforementioned problems, this invention proposes a radioactive seed implantation gun with a double-ring grip structure, which solves the issues of inflexible grip, inability to provide stable support in the hand, and risk of improper seed magazine positioning during seed implantation.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A radioactive seed implantation gun with a dual-ring grip structure, characterized in that it comprises: a main body, a screw-on connector, a snap-fit ​​connector, an upper circular ring handle, a ejector pin, a lower circular ring handle, a connecting post, and a seed magazine; the main body is a cylindrical structure with an internal circular hole extending along a first axis, the circular hole penetrating the front and rear ends of the main body; the screw-on connector and the snap-fit ​​connector are cylindrical structures, fixedly connected to the front end of the main body; the upper circular ring handle is composed of a first circular ring and a rear guide tube fixedly connected, and fixedly connected to the rear end of the main body via the rear guide tube; both the screw-on connector and the rear guide tube are hollow structures, and their axes are both on the first axis, forming a seed delivery channel; the seed magazine... The slot is detachably inserted into the upper side of the main body. When fully inserted, the particle channel of the particle magazine is coaxial with the seed pushing channel. The lower circular handle is composed of a second circular ring and a handle, which are fixedly connected to the lower side of the main body via a connecting post. The right side of the handle has an arc-shaped recess, the curvature of which is configured to fit the fingertip of the index finger and the arc of the web between the thumb and index finger. The connecting post is a cylindrical hollow structure. The first and second circular rings are coplanar and symmetrical, and their inner diameters and spacing are configured to provide a balanced torque when held with one hand. The upper and lower circular handles together form a double-ring grip structure, which provides triangular support when held with one hand, improving grip stability in the direction of application.

[0010] Optionally, the front end of the screw-on connector is a ring structure with a hollow cone protruding from the front end inside. The inner wall of the ring structure is provided with a double-ended internal thread, which tightly engages with the external thread of the threaded tailstock implantation needle. The front end of the snap-fit ​​connector is provided with a cylindrical inner hole, and an elastic claw is provided on the upper side, which is nested and gap-fitted with the tailstock of the cylindrical tailstock implantation needle, and is locked in place by the elastic claw. The implantation needle connector is fixedly installed on the front end of the main body by bolts on the lower side of the main body, and the two types of implantation needle connectors can be replaced by tightening and loosening the bolts.

[0011] Optionally, the lower side of the main body is provided with a waist-shaped through hole, the long axis of which is parallel to the first axis of the seed pushing channel, and the upper side of the waist-shaped through hole is provided with a chamfer to form a blood guiding section; the four corners of the slot are provided with arc-shaped transition structures with a radius of curvature ≥1mm and an extension direction orthogonal to the long axis of the waist-shaped through hole, so that the blood residue on the inner wall of the slot is guided to the guiding section of the waist-shaped through hole through the curved surface of the arc-shaped transition structure and finally discharged out of the main body. This is also more conducive to the smooth insertion of the particle magazine into the slot and the disinfection and cleaning of the inner wall of the slot.

[0012] Optionally, the bottom surface of the slot contacts the lower surface of the particle magazine, forming a first positioning constraint in the vertical direction; the side of the main body is provided with a threaded hole extending along a second axis, which penetrates the left and right sides of the main body, and the second axis is perpendicular to the first axis, and the second axis and the first axis are on the same plane; a ball is installed in the threaded hole on the left side of the main body, which cooperates with the recess on the left side of the particle magazine to form a second positioning constraint in the horizontal and vertical directions; a guide boss is installed in the threaded hole on the right side of the main body, which cooperates with the guide groove on the right side of the particle magazine to form a third positioning constraint in the rotational direction, and to prevent the magazine from being inserted in the opposite direction.

[0013] Optionally, the first positioning constraint, the second positioning constraint, and the third positioning constraint work together to ensure that the particle channel of the particle magazine is coaxial with the seed delivery channel.

[0014] Optionally, the ejector pin is composed of a push rod and a pinch head fixedly connected together, and the ejector pin can pass through the particle pushing channel to push the seed source in the particle magazine into the implantation needle and deliver it to the tumor target location.

[0015] Optionally, the first ring and the second ring are the same size.

[0016] Optionally, the lower circular handle is a fully enclosed ring structure.

[0017] Optionally, the dual-ring grip structure is further configured to: offset the deviation of the operating torque during gripping by the symmetrical distribution of the upper and lower rings, reduce hand tremors during particle implantation, and guide the fingers to bend naturally by the fully enclosed arc-shaped concave structure, reducing hand fatigue and enhancing grip stability.

[0018] A radioactive seed implantation gun with a dual-ring grip structure according to an embodiment of this application has the following beneficial effects:

[0019] The upper and lower circular grips together form a double-ring grip structure. The first ring of the upper circular grip and the second ring of the lower circular grip are coplanar, identical in size, and symmetrical. Their inner diameters and spacing are configured to balance the torque when gripped with one hand. The lower circular grip has an arc-shaped recess on the right side, the curvature of which is configured to fit the index fingertip and the web of the hand. The symmetrical distribution of the upper and lower rings offsets the deviation of the operating torque during gripping, reducing hand tremors during particle implantation. The fully enclosed structure of the arc-shaped recess guides the fingers to bend naturally, reducing hand fatigue and enhancing grip stability. Furthermore, the three positioning constraints within the slot of the main body work together to ensure that the particle channel of the particle magazine is coaxial with the seed delivery channel, and solves the problem of poor particle magazine insertion positioning when the magazine is not tightened. In addition, the implantation needle connector is fixed to the front end of the main body with bolts. By tightening and loosening the bolts, two types of implantation needle connectors can be replaced, improving the applicability of the seed implantation gun.

[0020] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a radioactive seed implantation gun with a double-ring grip structure provided in an embodiment of this application.

[0023] Figure 2 This is an exploded view of the various components of a main body connection provided in an embodiment of this application.

[0024] Figure 3 for Figure 1 A cross-sectional view along the AA direction.

[0025] Figure 4 for Figure 1 A cross-sectional view along the BB direction.

[0026] Figure 5 for Figure 1 A cross-sectional view along the BB direction after replacing the card connector.

[0027] Figure 6 This is a schematic diagram of the structure of a main body provided in an embodiment of this application.

[0028] Figure 7 for Figure 6 A schematic diagram of the structure from another perspective.

[0029] Figure 8 for Figure 6 A schematic diagram of the structure from the bottom view.

[0030] Figure 9 for Figure 6 A sectional view along the CC direction.

[0031] Figure 10 for Figure 6 A cross-sectional view along the DD direction.

[0032] Figure 11 This is a schematic diagram of the structure of a particle magazine provided in an embodiment of this application.

[0033] Figure 12 for Figure 11 A schematic diagram of the structure from another perspective.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1-Main body, 101-Slot, 102-Arc-shaped transition structure, 103-Chamfer, 104-Oval through hole, 2-Screw connector, 3-Snap-fit ​​connector, 4-Upper circular ring handle, 401-First circular ring, 402-Rear guide rod, 5-Ejector pin, 501-Pinch head, 502-Push rod, 6-Lower circular ring handle, 601-Second circular ring, 602-Handle, 60201-Arc-shaped recess, 7-Connecting post, 8-Particle magazine, 801-Magazine plug, 80101-Guide groove, 80102-Pit, 802-Magazine body, 803-Pressure rod, 9-Threaded tailstock implant pin, 10-Cylindrical tailstock implant pin, 11-Bolt, 12-Guide boss, 13-Elastic ball, 14-Plug, 15-Particle source. Detailed Implementation

[0036] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0037] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0040] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0041] like Figure 1-12 This application provides a radioactive seed implantation gun with a dual-ring grip structure, characterized in that it includes:

[0042] The system comprises a main body 1, a screw-on connector 2, a snap-fit ​​connector 3, an upper circular handle 4, a ejector pin 5, a lower circular handle 6, a connecting post 7, and a particle magazine 8. The main body 1 has a circular hole extending along a first axis, penetrating both the front and rear ends of the main body 1. The screw-on connector 2 and the snap-fit ​​connector 3 are both cylindrical structures with hollow interiors, fixedly connected to the front end of the main body 1. The upper circular handle 4 is composed of a first circular ring 401 and a rear guide tube 402 fixedly connected, and is fixedly connected to the rear end of the main body 1 via the rear guide tube 402. Both the screw-on connector 2 and the rear guide tube 402 are hollow structures, and their axes are both on the first axis, forming a particle pushing channel. The particle magazine 8 is detachably inserted into the main body 1. The upper slot 101, when fully inserted, has its particle channel and seed pushing channel coaxial with the particle magazine 8; the lower circular handle 6 is composed of a second circular ring 601 and a handle 602 fixedly connected, and is fixedly connected to the lower side of the main body 1 through a connecting post 7; the handle 602 has an arc-shaped recess on the right side, and the curvature of the recess is configured to fit the fingertip of the index finger and the arc of the web of the thumb; the connecting post 7 is a cylindrical hollow structure; the first circular ring 401 and the second circular ring 601 are coplanar and symmetrical, and their inner diameters and spacing are configured to balance the torque when held with one hand; the upper circular handle 4 and the lower circular handle 6 together form a double-ring grip structure, which forms a triangular support when held with one hand, improving the grip stability in the direction of application.

[0043] The main body 1 is a cylindrical structure, with slot 101 located on the upper side and not penetrating through it. (See reference...) Figure 6-9 and Figure 11-12 The main body 1 has a threaded hole extending along the second axis on its side, passing through both the left and right sides. The second axis is perpendicular to the first axis, and the second axis and the first axis are on the same plane. (See reference...) Figure 3When the seed magazine 8 is fully inserted, the bottom surface of the slot 101 contacts the lower surface of the seed magazine 8, forming a first vertical positioning constraint. An elastic ball 13 is installed in the threaded hole on the left side of the main body 1, which cooperates with the recess 80102 on the left side of the plug 801 of the seed magazine 8, forming a second horizontal and vertical positioning constraint. A guide boss 12 is installed in the threaded hole on the right side of the main body 1, which cooperates with the guide groove 80101 on the right side of the plug 801 of the seed magazine 8, forming a third rotational positioning constraint and preventing the seed magazine 8 from being inserted in the opposite direction. The first, second, and third positioning constraints work together to ensure that the particle channel of the seed magazine 8 is coaxial with the seed pushing channel. To prevent the guide boss 12 and the elastic ball 13 from loosening in the threaded hole of the main body 1, plugs 14 are added on both the left and right sides, forming a double-threaded locking structure to prevent loosening.

[0044] For further details, please refer to [link / reference]. Figure 8 and Figure 10 The main body 1 has a waist-shaped through hole 104 on its lower side, the long axis of which is parallel to the first axis of the seed pushing channel, and a chamfer 103 is provided on the upper side of the waist-shaped through hole 104 to form a blood guiding surface; the slot 101 of the main body 1 has an arc-shaped transition structure 102 at its four corners, the radius of curvature of which is ≥1mm, and the extension direction is orthogonal to the long axis of the waist-shaped through hole 104, so that the blood residue on the inner wall of the slot 101 is guided to the guiding surface of the waist-shaped through hole 104 through the curved surface of the arc-shaped transition structure 102, and finally discharged from the main body 1. It is also more conducive to the smooth insertion of the particle magazine 8 into the slot 101, as well as the disinfection and cleaning of the inner wall of the slot 101.

[0045] In a radioactive seed implantation gun with a double-ring grip structure according to an embodiment of this application, see... Figure 2 , Figure 4 and Figure 5 The screw-on connector 2 has a circular ring structure at its front end, with a hollow cone protruding from the front end inside. The inner wall of the circular ring structure is provided with a double-ended internal thread, which tightly engages with the external thread of the tailstock of the threaded tailstock implantation needle 9. The snap-fit ​​connector 3 has a cylindrical inner hole at its front end, with an elastic claw 302 on its upper side, which engages with the tailstock of the cylindrical tailstock implantation needle 10 through a nesting gap, and is secured by the elastic claw 302. Both implantation needle connectors 2 and 3 are fixedly installed at the front end of the main body 1 by bolts 11, and the two types of implantation needle connectors can be replaced by tightening and loosening the bolts 11.

[0046] Furthermore, after the screw-on connector 2 is tightly fitted with the threaded tailstock implantation needle 9 or the snap-fit ​​connector 3 is snap-fitted with the cylindrical tailstock implantation needle 10, the ejector pin 5 can pass through the particle pushing channel formed by the rear guide rod 402 and the implantation needle connector 2 or 3 to push the particle source 14 in the particle magazine 8 into the inner cavity of the implantation needle 9, and continue to push out the tip of the implantation needle 9 or 10 to the tumor target location. The ejector pin 5 is composed of a pinch head 501 and a push rod 502 fixedly connected.

[0047] In a radioactive seed implantation gun with a double-ring grip structure according to an embodiment of this application, see... Figure 1 The double-ring grip structure, which consists of the upper ring grip 4 and the lower ring grip 6, is further configured such that the symmetrical distribution of the first ring 401 and the second ring 601 offsets the deviation of the operating torque during gripping, thereby reducing hand tremors during particle implantation.

[0048] Furthermore, the lower circular handle 6 has a fully enclosed ring structure. The fully enclosed structure of the arc-shaped recess 60201 of its handle 602 can guide the fingers to bend naturally, reduce hand fatigue and enhance grip stability.

[0049] Furthermore, the first ring 401 and the second ring 402 are the same size and have a seamless closed ring structure, which improves aesthetics and grip comfort.

[0050] Compared with the prior art, the advantages of the radioactive seed implantation gun with a dual-ring grip structure in this application embodiment are as follows: the upper circular grip 4 and the lower circular grip 6 together form a dual-ring grip structure. The first circular ring 401 and the second circular ring 601 are coplanar, identical in size, and symmetrical, which offsets the deviation of the operating torque during gripping and reduces hand tremors when the doctor operates the implantation gun for seed implantation. Furthermore, the handle 602 of the lower circular grip 6 is set as a fully enclosed structure, and its right side has an arc-shaped recess 60201. The curvature of the recess is configured to fit the fingertip of the index finger and the arc of the web of the thumb, which can guide the doctor's fingers to bend naturally. When gripping, it cooperates with the first circular ring 401 and the second circular ring 601 to form a three-point stable support, further reducing hand fatigue and enhancing grip stability. In addition, the main body 1 uses three positioning constraints in the slot 101 to ensure that the particle channel of the particle magazine 8 is coaxial with the seed delivery channel, and solves the problem of poor particle magazine insertion positioning when the magazine is not tightened. In addition, both the screw-on connector 2 and the snap-fit ​​connector 3 can be fixedly installed at the front end of the main body 1 by bolts 11. The two types of implantation needle connectors can be replaced by tightening or loosening the bolts 11, thereby improving the applicability of the seed implantation gun.

[0051] In this specification, the illustrative expressions of terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A radioactive seed implantation gun with a double-ring grip structure, characterized in that, include: The system comprises a main body, a screw-on connector, a snap-fit ​​connector, an upper circular handle, a ejector pin, a lower circular handle, a connecting post, and a particle magazine. The main body is cylindrical with an internal circular hole extending along a first axis, penetrating both the front and rear ends. The screw-on connector and snap-fit ​​connector are also cylindrical and hollow, both fixedly connected to the front end of the main body. The upper circular handle consists of a first circular ring and a rear guide tube, fixedly connected to the rear end of the main body via the rear guide tube. Both the screw-on connector and the rear guide tube are hollow, with their axes aligned on the first axis, forming a particle delivery channel. The particle magazine is detachably inserted into the main body. The slot on the upper side of the main body is designed so that the particle channel of the particle magazine is coaxial with the particle pushing channel when fully inserted. The lower circular handle is composed of a second circular ring and a handle, which are fixedly connected to the lower side of the main body via a connecting post. The right side of the handle has an arc-shaped recess, the curvature of which is configured to fit the fingertip of the index finger and the arc of the web between the thumb and index finger. The connecting post is a cylindrical hollow structure. The first and second circular rings are coplanar and symmetrical, and their inner diameters and spacing are configured to provide a balanced torque when held with one hand. The upper and lower circular handles together form a double-ring grip structure, which provides triangular support when held with one hand, improving grip stability in the direction of application.

2. The radioactive seed implantation gun with a double-ring grip structure according to claim 1, characterized in that, The front end of the screw-on connector is a circular ring structure with a hollow cone protruding from the front end inside. The inner wall of the circular ring structure is provided with a double-ended internal thread, which tightly engages with the external thread of the threaded tail seat implantation needle. The front end of the snap-fit ​​connector is provided with a cylindrical inner hole and an elastic claw on the upper side, which is nested and gap-fitted with the tail seat of the cylindrical tail seat implantation needle, and is clamped by the elastic claw. The implantation needle connector is fixedly installed on the front end of the main body by bolts on the lower side of the main body, and the two types of implantation needle connectors can be replaced by tightening and loosening the bolts.

3. The radioactive seed implantation gun with a double-ring grip structure according to claim 1, characterized in that, The main body has a waist-shaped through hole on its lower side, the long axis of which is parallel to the first axis of the seed pushing channel, and the upper side of the waist-shaped hole is chamfered to form a blood guiding cross-section; the four corners of the slot are provided with arc-shaped transition structures with a radius of curvature ≥1mm, and the extension direction is orthogonal to the long axis of the waist-shaped hole.

4. The radioactive seed implantation gun with a double-ring grip structure according to claim 1, characterized in that, The bottom surface of the slot contacts the lower surface of the particle magazine, forming a first positioning constraint in the vertical direction; the side of the main body is provided with a threaded hole extending along a second axis, which penetrates the left and right sides of the main body, and the second axis is perpendicular to the first axis, and the second axis and the first axis are on the same plane; a ball is installed in the threaded hole on the left side of the main body, which cooperates with the recess on the left side of the particle magazine to form a second positioning constraint in the horizontal and vertical directions; a guide boss is installed in the threaded hole on the right side of the main body, which cooperates with the guide groove on the right side of the particle magazine to form a third positioning constraint in the rotational direction, and to prevent the magazine from being inserted in the opposite direction.

5. The radioactive seed implantation gun with a double-ring grip structure according to claim 4, characterized in that, The first, second, and third positioning constraints work together to ensure that the particle channel of the particle magazine is coaxial with the seed delivery channel.

6. The radioactive seed implantation gun with a double-ring grip structure according to claim 1, characterized in that, The ejector pin is composed of a push rod and a pinch head that are fixedly connected. The ejector pin can pass through the particle pushing channel to push the seed source in the particle magazine into the implantation needle and deliver it to the tumor target location.

7. The radioactive seed implantation gun with a double-ring grip structure according to claim 1, characterized in that, The first ring and the second ring are the same size.

8. The radioactive seed implantation gun with a double-ring grip structure according to claim 1, characterized in that, The lower circular handle has a fully enclosed ring structure.

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