Pill injection remaining needle
By designing a short flexible tube and a guiding device for the indwelling needle for pellet injection, the problem of deformation of the indwelling needle during high-pressure injection was solved, enabling rapid and safe injection of radionuclides, and making it suitable for pellet injection in nuclear medicine imaging.
Patent Information
- Application Number
- CN202520508159.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-21
AI Technical Summary
Existing indwelling needles, due to their long tubing length, cause significant tubing expansion under high pressure during pellet injection, affecting the injection effect.
A pellet injection indwelling needle was designed, which uses a short first tubing and a rigid terminal, and is equipped with a guide device and a sealing terminal. Rapid high-pressure injection is achieved through the guide needle, and a cavity is set in the sealing terminal for sterilization to ensure the sterilization and sealing of the guide device.
It enables rapid injection of radionuclides with minimal deformation, ensuring the effectiveness and safety of the injection, and the guiding device is reusable.
Smart Images
Figure CN223831589U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a pellet injection indwelling needle. Background Technology
[0002] Injection of a pellet is a common technique in nuclear medicine imaging. A high concentration of radiopharmaceutical is injected into a vein under high pressure, and then the pressure is quickly reduced, allowing a small dose of the drug to enter the site of examination in a pellet form.
[0003] Indwelling needles are an important carrier for granulation injection. The indwelling needles in the current technology are the traditional indwelling needles used for infusion. When used for granulation injection, the long length of the tubing causes significant expansion of the tubing under high pressure, which affects the injection.
[0004] Based on the above problems, we designed a pellet injection indwelling needle that can achieve rapid high-pressure injection and has minimal deformation. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a pellet injection indwelling needle that can achieve rapid high-pressure injection and has minimal deformation.
[0006] To solve the above problems, the present invention adopts the following technical solution:
[0007] A pellet injection indwelling needle includes a soft needle, one end of which is inserted through the body, and the other end of which is provided with a rigid terminal. A guide device is installed through the rigid terminal. A sealing terminal is fitted inside the rigid terminal, and the guide device passes through the sealing terminal. A first flexible tube is provided on the outer wall of the soft needle near the rigid terminal. A rigid tube is provided at the end of the first flexible tube away from the soft needle. A radionuclide injection port is provided on the outer wall of the rigid tube. A first heparin cap is provided at the radionuclide injection port. A second flexible tube is provided at the end of the rigid tube. A second heparin cap is provided at the end of the second flexible tube away from the rigid tube. The length of the first flexible tube is less than the length of the second flexible tube. The length of the first flexible tube is 2-4 cm. A water-stop clamp is installed at the first flexible tube.
[0008] Preferably, a cavity is provided at the center of the sealing terminal, and iodine is injected into the cavity. Inside the sealing terminal, a first cavity is provided on both sides of the cavity. The guiding device starts to puncture from the sealing terminal, first passing through the first cavity on one side, then through the cavity, and then through the first cavity on the other side to reach the soft needle.
[0009] Preferably, a retaining ring is provided on the outer wall of the sealing terminal, and a retaining groove is provided on the inner wall of the rigid terminal for engaging the retaining ring.
[0010] Preferably, the outer end face of the sealing terminal is provided with a tapered guide surface, and the guide device is inserted into the sealing terminal through the center of the guide surface.
[0011] Preferably, the guiding device includes an end portion having a threaded portion that engages with the rigid terminal. The end portion is located at the end face of the rigid terminal. After being screwed in, the threaded portion abuts against the sealing terminal. A guiding needle is embedded in the end portion. The guiding needle passes through the sealing terminal and exits from the opening of the soft needle. A rod portion is provided at the axial center of the end portion.
[0012] Preferably, a handhold piece is provided on the outer side of the rod.
[0013] Preferably, the surface of the handheld piece is injection molded with anti-slip texture.
[0014] The beneficial effects of this invention are: this device can rapidly push in radionuclides and simultaneously introduce other pharmaceutical substances; the guiding device in this device can be reused after disassembly; and because the length of the first tubing is relatively short, the deformation of the first tubing is small when the drug is pushed in under high pressure, thus achieving effective injection of radionuclides. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 This is a half-sectional view of the sealed terminal;
[0018] Figure 3 This is a schematic diagram of the installation of the sealed terminal;
[0019] Figure 4 This is a structural diagram of the guiding device. Detailed Implementation
[0020] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.
[0021] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.
[0022] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and 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.
[0023] Furthermore, in the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0025] See Figure 1 The illustrated pellet injection indwelling needle includes a soft needle 1, one end of which is through-hole, and the other end is provided with a rigid terminal 2. A guide device 3 is installed through the rigid terminal 2. A sealing terminal 4 is fitted inside the rigid terminal 2, and the guide device 3 passes through the sealing terminal 4. A first flexible tube 5 is provided on the outer wall of the soft needle 1 near the rigid terminal 2. A rigid tube 6 is provided at the end of the first flexible tube 5 away from the soft needle 1. A radionuclide injection port 7 is provided on the outer wall of the rigid tube 6. A first heparin cap 8 is provided at the radionuclide injection port 7. A second flexible tube 9 is provided at the end of the rigid tube 6. A second heparin cap 10 is provided at the end of the second flexible tube 9 away from the rigid tube 6. The length of the first flexible tube 5 is less than the length of the second flexible tube 9. A water-stop clamp 555 is installed at the first flexible tube 5.
[0026] In the above technical solution, the length of the first tubing 5 is less than the length of the second tubing 9. Compared with the traditional indwelling needle, the length of the first tubing 5 is shorter. When the radionuclide material is quickly pushed in through the first heparin cap 8, the radionuclide material can be pushed into the blood vessel more quickly and in a shorter time.
[0027] And this process does not affect the application of the second hose 9.
[0028] See Figure 2 As shown, a cavity 41 is provided at the center of the sealing terminal 4, and iodine is injected into the cavity 41. Inside the sealing terminal 4, a first cavity 42 is provided on both sides of the cavity 41. The guiding device 3 starts to puncture from the sealing terminal 4, first passing through the first cavity 42 on one side, then through the cavity 41, and then through the first cavity 42 on the other side to reach the soft needle 1.
[0029] The above technical solution mainly involves disinfecting the guide device 3 with iodine in the cavity 41. After disinfection, the guide device 3 also needs to pass through the first cavity 42 to avoid the residual iodine in the soft needle 1.
[0030] See Figure 2 As shown, a retaining ring 441 is provided on the outer wall of the sealing terminal 4, and a retaining groove (not shown) is provided on the inner wall of the rigid terminal 2 for engaging the retaining ring 441.
[0031] The structure of the retaining ring 441 and the retaining groove allows for more stable fixing of the sealing terminal 4 and sufficient sealing.
[0032] See Figure 2 and Figure 3 As shown, a tapered guide surface 442 is provided on the outer end face of the sealing terminal 4, and the guide device 3 is inserted into the sealing terminal 4 through the center of the guide surface 442.
[0033] The guide surface 442 can be used to center the guide device 3.
[0034] See Figure 1 and Figure 4 As shown, the guiding device 3 includes an end portion 31, which has a threaded portion 32 that engages with the rigid terminal. The end portion 31 is located at the end face of the rigid terminal 2. After the threaded portion 32 is screwed in, it abuts against the sealing terminal 4. A guiding needle 33 is implanted in the end portion 31. The guiding needle 33 passes through the sealing terminal 4 and then exits from the opening of the soft needle 1. A rod portion 34 is provided at the axial center of the end portion 31.
[0035] In the above technical solution, the guide needle 33 plays a positioning role for the soft needle 1, ensuring that the soft needle 1 can be smoothly inserted into the blood vessel, and then the end 31 is rotated so that the guide needle 33 can be pulled out.
[0036] When pulling out, avoid bringing blood out by sealing terminal 4.
[0037] Preferably, a hand grip 35 is provided on the outer side of the rod 34.
[0038] The 35-inch handheld piece facilitates the insertion of the guide needle.
[0039] Preferably, the surface of the handheld piece 35 is injection molded with anti-slip texture 355.
[0040] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0041] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0042] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0043] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0044] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.
[0045] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A pellet injection indwelling needle, characterized in that: The device includes a soft needle, one end of which is through-hole, and the other end has a rigid terminal. A guide device is installed through the rigid terminal. A sealing terminal is fitted inside the rigid terminal, and the guide device passes through the sealing terminal. A first flexible tube is provided on the outer wall of the soft needle near the rigid terminal. A rigid tube is provided at the end of the first flexible tube away from the soft needle. A radionuclide injection port is provided on the outer wall of the rigid tube. A first heparin cap is provided at the radionuclide injection port. A second flexible tube is provided at the end of the rigid tube. A second heparin cap is provided at the end of the second flexible tube away from the rigid tube. The length of the first flexible tube is shorter than the length of the second flexible tube. A water-stop clamp is installed at the first flexible tube.
2. The indwelling needle for projectile injection according to claim 1, characterized in that: A cavity is provided at the center of the sealing terminal, and iodine is injected into the cavity. Inside the sealing terminal, there are first cavities on both sides of the cavity. The guiding device starts to puncture from the sealing terminal, first passing through the first cavity on one side, then through the cavity, and then through the first cavity on the other side to reach the soft needle.
3. The indwelling needle for projectile injection according to claim 2, characterized in that: A retaining ring is provided on the outer wall of the sealing terminal, and a retaining groove is provided on the inner wall of the rigid terminal for engaging the retaining ring.
4. The indwelling needle for projectile injection according to claim 2, characterized in that: The outer end face of the sealing terminal is provided with a tapered guide surface, and the guide device is inserted into the sealing terminal through the center of the guide surface.
5. The indwelling needle for projectile injection according to claim 4, characterized in that: The guiding device includes an end portion having a threaded portion that engages with the rigid terminal. The end portion is located at the end face of the rigid terminal. After being screwed in, the threaded portion abuts against the sealing terminal. A guiding needle is embedded in the end portion. The guiding needle passes through the sealing terminal and exits from the opening of the soft needle. A rod portion is provided at the axial center of the end portion.
6. The indwelling needle for projectile injection according to claim 5, characterized in that: A hand grip is provided on the outer side of the rod.
7. The indwelling needle for projectile injection according to claim 6, characterized in that: The surface of the handheld piece is injection molded with anti-slip texture.