Internal radiotherapy needle guide

Abstract

The present invention relates to an internal radiotherapy implant needle guide, comprising a rod-shaped body, a central bore arranged along the central axis of the rod-shaped body, axial needle passageways evenly distributed along the circumference of the rod-shaped body and arranged parallel to the central boreway, a plurality of oblique needle entry openings arranged on the side of the rod-shaped body's tail end, and a plurality of oblique needle exit openings arranged on the side of the rod-shaped body's head end; the oblique needle entry openings and oblique needle exit openings correspond to each other and are connected by the oblique needle passageways. The present invention facilitates implant needle positioning and has a simple structure.

Description

Technical Field

[0001] The present invention belongs to the technical field of radiotherapy auxiliary equipment, and in particular relates to an internal radiotherapy implant needle guide. Background Art

[0002] Cervical cancer is the most common gynecological malignancy, and its incidence has been trending toward younger patients in recent years. The widespread use of cervical cytology screening in recent decades has enabled the early detection and treatment of cervical cancer and precancerous lesions, leading to a significant decrease in the incidence and mortality of cervical cancer.

[0003] Treatment for cervical cancer primarily includes surgery, radiotherapy, and chemotherapy. With the rapid development of precision radiotherapy, which focuses on precise targeting and treatment, targeted radiotherapy has become a research hotspot. Implant therapy involves inserting a hollow steel needle into the tumor, connected to an afterloader, and precisely irradiating the cancerous area with a radiation source to achieve a satisfactory dose distribution.

[0004] However, the insertion of the needle is time-consuming, difficult to position, and requires a high level of proficiency from the doctor.

[0005] Chinese patent CN214713814U discloses a template for an implant needle applicator with controllable travel distance, which guides the implant needle through several parallel needle channels. Chinese patent CN208552887U discloses a multi-channel vaginal post-loading treatment device, which similarly utilizes a coaxially positioned, perforated inlet opening within the device body to guide the implant needle. However, these technical solutions all suffer from a limited operating surface, making them inadequate for implantation of cancerous lesions in all directions of the cervix. Summary of the Invention

[0006] The purpose of the present invention is to provide an internal radiotherapy implantation needle guide which is convenient for implantation needle positioning and has a simple structure.

[0007] The present invention adopts the following technical solutions:

[0008] A radiotherapy implant needle guide comprises a rod-shaped body, a central hole arranged along the central axis of the rod-shaped body, an axial needle threading channel evenly distributed along the circumference of the rod-shaped body and arranged parallel to the central hole, a plurality of oblique needle entry ports arranged on the side of the tail end of the rod-shaped body, and a plurality of oblique needle exit ports arranged on the side of the head end of the rod-shaped body; the oblique needle entry ports and the oblique needle exit ports correspond to each other one by one and are connected through the oblique needle threading channel.

[0009] Furthermore, an extension tube is provided at the tail of the rod-shaped body, and the inner diameter of the extension tube is the same as the diameter of the central channel and is coaxially arranged.

[0010] Furthermore, a ring platform is provided on the outer edge of the tail end of the extension tube.

[0011] Furthermore, the oblique needle entry port is connected to the outer edge of the tail end of the rod-shaped body, and the oblique needle exit port is tangent to the outer edge of the head end of the rod-shaped body.

[0012] Further, the oblique needle entry port includes a first oblique needle entry port, a second oblique needle entry port, a third oblique needle entry port, a fourth oblique needle entry port, a fifth oblique needle entry port, and a sixth oblique needle entry port arranged clockwise; the oblique needle exit port includes a first oblique needle exit port, a second oblique needle exit port, a third oblique needle exit port, a fourth oblique needle exit port, a fifth oblique needle exit port, and a sixth oblique needle exit port arranged clockwise; the first oblique needle entry port is connected to the fifth oblique needle exit port; the second oblique needle entry port is connected to the sixth oblique needle exit port; the third oblique needle entry port is connected to the first oblique needle exit port; the fourth oblique needle entry port is connected to the second oblique needle exit port; the fifth oblique needle entry port is connected to the third oblique needle exit port; and the sixth oblique needle entry port is connected to the fourth oblique needle exit port.

[0013] Furthermore, a sunken groove is provided at the front end of the rod-shaped body, and the central channel opens at the bottom of the sunken groove.

[0014] Furthermore, the rod-shaped body, the extension tube and the ring platform are integrally arranged.

[0015] Furthermore, the diameter of the head end of the rod-shaped body is 30-33 mm, the diameter of the tail end is 28-31 mm, and the length is 8-12 cm.

[0016] The beneficial effects of the present invention are as follows: the guide structure of the present invention is ingenious, and the axial needle insertion channel and the oblique needle insertion channel are used in combination, which greatly increases the operable area, can meet the needs of operating at different positions, greatly reduces the difficulty of operation for doctors, is conducive to precise positioning, and can be accurately inserted into the tumor to implement radiotherapy operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a structural schematic diagram of the sunken groove of the present invention.

[0019] Figure 3 It is a schematic diagram of the head end structure of the present invention.

[0020] Figure 4 for Figure 3 AA cross-sectional structure diagram.

[0021] Figure 5 for Figure 3 Schematic diagram of the BB cross-section structure.

[0022] Among them, 1 is a rod-shaped body, 2 is a central channel, 3 is an axial needle threading channel, 4 is an extension tube, 5 is a ring platform, 6 is a first oblique needle entry port, 7 is a second oblique needle entry port, 8 is a third oblique needle entry port, 9 is a fourth oblique needle entry port, 10 is a fifth oblique needle entry port, 11 is a sixth oblique needle entry port, 12 is a first oblique needle exit port, 13 is a second oblique needle exit port, 14 is a third oblique needle exit port, 15 is a fourth oblique needle exit port, 16 is a fifth oblique needle exit port, 17 is a sixth oblique needle exit port, 18 is a sunken groove, and 19 is an oblique needle threading channel. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0025] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0026] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0027] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0028] like Figures 1 to 5 As shown, an internal radiotherapy needle guide comprises a rod-shaped body 1, a central bore 2 arranged along the central axis of the rod-shaped body 1, axial needle passages 3 evenly distributed along the circumference of the rod-shaped body 1 and arranged parallel to the central bore 2, a plurality of oblique needle entry openings arranged on the side of the tail end of the rod-shaped body 1, and a plurality of oblique needle exit openings arranged on the side of the head end of the rod-shaped body. The oblique needle entry openings and oblique needle exit openings correspond to each other and are connected by oblique needle passages 19. The rod-shaped body is a solid baseball bat-shaped body with a larger head end than the tail end. The central bore and the axial needle passages both penetrate the rod-shaped body and have openings at the head and tail ends. The central bore, axial needle passages, and oblique needle passages do not intersect. To accommodate the conditions of the vagina and cervix, the rod-shaped body preferably has a diameter of 30-33 mm at the head end, a diameter of 28-31 mm at the tail end, and a length of 8-12 cm.

[0029] The tail of the rod-shaped body 1 is provided with an extension tube 4. The inner diameter of the extension tube 4 is the same as the diameter of the central channel 2 and is coaxially arranged. The extension tube is located at the tail of the rod-shaped body, making it easier for the surgeon to grasp and operate. The outer edge of the tail end of the extension tube 4 is provided with a ring 5. During the operation, the surgeon holds the extension tube and inserts the introducer into the vagina. The ring is located outside the body and is inserted through the extension tube using calipers. After passing through the central channel, it finally exits from the head of the rod-shaped body and is clamped to the cervix, completing the fixation of the rod-shaped body to the cervix.

[0030] The oblique needle entry port connects to the outer edge of the tail end of the rod-shaped body 1, and the oblique needle exit port is tangent to the outer edge of the head end of the rod-shaped body 1. The implant needle is inserted through the oblique needle entry port and exits through the oblique needle exit port after passing through the oblique needle passage, which forms an acute angle with the central axis. If a single implant needle is inserted through each oblique needle exit port, all implant needles can cover a circular area with a diameter of 38 to 42 mm at a distance of 5 cm from the head end of the rod-shaped body, greatly expanding the implant needle's operating range and enabling operation on tumors in any direction.

[0031] As a preferred solution, the oblique needle entry port includes a first oblique needle entry port 6, a second oblique needle entry port 7, a third oblique needle entry port 8, a fourth oblique needle entry port 9, a fifth oblique needle entry port 10, and a sixth oblique needle entry port 11 arranged clockwise; the oblique needle exit port includes a first oblique needle exit port 12, a second oblique needle exit port 13, a third oblique needle exit port 14, a fourth oblique needle exit port 15, a fifth oblique needle exit port 16, and a sixth oblique needle exit port 17 arranged clockwise. Each oblique needle exit port and oblique needle entry port is spaced apart from the axial needle passage opening at the same end thereof. The first oblique needle entry port 6 is connected to the fifth oblique needle exit port 16; the second oblique needle entry port 7 is connected to the sixth oblique needle exit port 17; the third oblique needle entry port 8 is connected to the first oblique needle exit port 12; the fourth oblique needle entry port 9 is connected to the second oblique needle exit port 13; the fifth oblique needle entry port 10 is connected to the third oblique needle exit port 14; the sixth oblique needle entry port 11 is connected to the fourth oblique needle exit port 15.

[0032] The front end of the rod-shaped body 1 is provided with an indented groove 18. The axial needle insertion channel is located at the head end of the rod-shaped body and is evenly distributed around the periphery of the indented groove. The central channel 2 opens at the bottom of the indented groove 18. The indented groove allows space at the head end of the rod-shaped body to avoid tissue displacement caused by squeezing and positioning errors.

[0033] The rod-shaped body 1, the extension tube 4 and the ring platform 5 are integrally arranged. The entire device can be formed by 3D printing.

Claims

1. An internal radiotherapy implant needle guide, characterized in that: It comprises a rod-shaped body (1), a central hole (2) arranged along the central axis of the rod-shaped body (1), an axial needle-threading channel (3) uniformly distributed along the circumference of the rod-shaped body (1) and arranged parallel to the central hole (2), a plurality of oblique needle entry openings arranged on the side of the tail end of the rod-shaped body (1), and a plurality of oblique needle exit openings arranged on the side of the head end of the rod-shaped body; the oblique needle entry openings and the oblique needle exit openings correspond to each other one by one and are connected through the oblique needle-threading channel (19); the rod-shaped body (1) is a baseball with a head end larger than a tail end. A rod-shaped solid body; the central hole (2), the axial needle-threading channel (3) and the oblique needle-threading channel (19) do not intersect with each other; an extension tube (4) is provided at the tail of the rod-shaped body (1) to facilitate the surgeon's grip and operation, the inner diameter of the extension tube (4) being the same as the diameter of the central hole (2) and being coaxially arranged; a ring platform (5) is provided at the outer edge of the tail end of the extension tube (4); a sunken groove (18) is provided at the front end of the rod-shaped body (1), and the central hole (2) opens at the bottom of the sunken groove (18); The oblique needle entry port is connected to the outer edge of the tail end of the rod-shaped body (1), and the oblique needle exit port is tangent to the outer edge of the head end of the rod-shaped body (1); The oblique needle entry port comprises a first oblique needle entry port (6), a second oblique needle entry port (7), a third oblique needle entry port (8), a fourth oblique needle entry port (9), a fifth oblique needle entry port (10), and a sixth oblique needle entry port (11) arranged in a clockwise direction; the oblique needle exit port comprises a first oblique needle exit port (12), a second oblique needle exit port (13), a third oblique needle exit port (14), a fourth oblique needle exit port (15), a fifth oblique needle exit port (16), a sixth oblique needle exit port (17) arranged in a clockwise direction. 7); the first oblique needle entry port (6) is connected to the fifth oblique needle exit port (16); the second oblique needle entry port (7) is connected to the sixth oblique needle exit port (17); the third oblique needle entry port (8) is connected to the first oblique needle exit port (12); the fourth oblique needle entry port (9) is connected to the second oblique needle exit port (13); the fifth oblique needle entry port (10) is connected to the third oblique needle exit port (14); the sixth oblique needle entry port (11) is connected to the fourth oblique needle exit port (15); The rod-shaped main body (1), the extension tube (4) and the ring platform (5) are integrally arranged, and the entire device can be formed by 3D printing.

2. The internal radiotherapy implant needle guide according to claim 1, characterized in that: The rod-shaped main body (1) has a head end diameter of 30 to 33 mm, a tail end diameter of 28 to 31 mm, and a length of 8 to 12 cm.

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