MR implantation needle developing core, implantation needle and positioning assembly

Abstract

The utility model relates to the technical field of medical instruments, in particular to an MR (magnetic resonance) implantation needle developing core, an implantation needle and a positioning assembly, the inside of the developing core comprises a solid structure and a hollow structure, and developing liquid is packaged in the hollow structure; a plurality of packaging nodes are arranged on a needle body of the implantation needle, a developing solution capable of developing under nuclear magnetism is packaged in a developing core, and a needle tip length checking ruler is matched to determine packaging scales of the developing solution, so that the implantation needle can adapt to implantation treatment in different scenes, a physicist can intuitively and accurately judge the position of a needle tip, and the accuracy of the implantation treatment is improved. Therefore, the dosage of implantation treatment is further accurate, errors caused by insufficient experience of doctors are avoided, meanwhile, damage to surrounding healthy tissues is reduced, the treatment safety is improved, and the method has important significance on accurate treatment of diseases such as tumors and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially relates to a MR implantation needle visualization core, implantation needle and positioning assembly. BACKGROUND

[0002] In radiotherapy, in order to improve the treatment effect, often adopt the direct implantation of radioactive source or close to the tumor site brachytherapy, compared with external beam radiotherapy, brachytherapy can provide high dose radiation directly to tumor area, at the same time, try to reduce the influence to surrounding healthy tissue, is widely used in the treatment of cervical cancer, prostate cancer, breast cancer and skin cancer, also applicable to many other parts of tumor treatment. Afterloading therapy machine is a kind of commonly used equipment of brachytherapy, afterloading radiotherapy is first placed in the treatment site of patient's container without radioactive source, including the source loading tube or other auxiliary equipment (also known as source applicator) for connecting with radioactive source transmission tube, can be single or multiple containers, then under the condition of safety protection or with remote control device, in the compartment, radioactive source is sent to the empty guide tube in patient's body cavity through radiation guide tube, and radiotherapy is carried out.

[0003] And after nearly 30 years of rapid development, there are many types of afterloading therapy machine, according to the dose rate of radioactive source during treatment, it can be divided into 'high dose rate (A point dose rate >12Gy / h)','medium dose rate (A point dose rate is between 4-12Gy / h)' and 'low dose rate (A point dose rate is between 0.2-4Gy / h)', and now commonly used in hospitals is high dose rate gamma ray remote control afterloading therapy machine, which can realize accurate dose distribution and maximize the protection of surrounding healthy tissue, but the calculation precision of radiation dose must be accurately controlled.

[0004] In the current stage, the MR (Magnetic Resonance Imaging) implanting needle used in the afterloading therapy machine existing in the market is mostly processed by engineering plastics, and the engineering plastics cannot be imaged under the nuclear magnetic due to the material characteristics, so that the existing MR implanting needle applicator often relies on the experience of doctors when inserting into the tissue, and the doctors need to manually adjust the needle insertion position, direction and depth of the MR implanting needle applicator during the MR positioning process until the appropriate position is reached. The problem of non-imaging of the MR implanting needle under the nuclear magnetic increases the operation difficulty of the doctors adjusting the MR implanting needle applicator, reduces the operation efficiency, and affects the treatment effect. At the same time, during the afterloading therapy plan making process, the physicist needs to reconstruct the MR implanting needle applicator according to the MR positioning image, and the process needs to accurately identify the position of the needle tip of the MR implanting needle, and then determine the position of the first residence point according to the offset value (the distance between the needle tip of the MR implanting needle applicator and the first residence point) of the MR implanting needle applicator, so if the MR implanting needle applicator is not clearly imaged, the physicist cannot accurately determine the actual position of the needle tip of the MR implanting needle, and if the residence point position identification deviates, it will directly affect the accuracy of the treatment plan and the safety of the patient. Practical new type content

[0005] In order to solve the problem that the MR implanting needle cannot be imaged under the nuclear magnetic resonance, so that the actual position of the needle tip cannot be accurately determined, and the accuracy of the radioactive source dose distribution is affected, the utility model provides a MR implanting needle positioning assembly which can be adapted to implanting treatment in different scenes, so that the physicist can intuitively and accurately determine the position of the needle tip.

[0006] A MR implanting needle imaging core, comprising a hollow tube and a solid structure encapsulated in one end of the hollow tube, characterized in that the hollow tube encapsulates a developing liquid, and the developing liquid is physiological saline.

[0007] Further, the hollow tube and the solid structure are integrally formed; the developing liquid is encapsulated in a single segment or multiple segments.

[0008] Further, the length of each segment of the multiple segment encapsulation of the developing liquid is the same, and the encapsulation intervals are consistent.

[0009] Further, iodophor is added as a dyeing agent in the developing liquid.

[0010] Further, the solid structure is a solid plastic rod, the hollow tube is a hollow plastic tube, and the solid plastic rod and the hollow plastic tube are both engineering plastics.

[0011] A MR implanting needle, comprising an implanting needle body, an implanting needle tip and the MR implanting needle imaging core described above, wherein the MR implanting needle imaging core is arranged in the interior of the implanting needle body.

[0012] The MR implant needle positioning assembly comprises the MR implant needle developing core, the MR implant needle and the needle tip length calibrating ruler, the developing core is arranged inside the MR implant needle, and the needle tip length calibrating ruler is arranged outside the MR implant needle.

[0013] Further, the needle tip length calibrating ruler comprises a fixed groove, a scale ruler arranged on both sides of the fixed groove and a needle tip reference line arranged at the top end of the fixed groove.

[0014] The MR implant needle positioning assembly has the advantages that:

[0015] The MR implant needle positioning assembly has the advantages that: BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structure schematic diagram of the MR implant needle of the utility model;

[0017] Figure 2 is a structure schematic diagram of the MR implant needle developing core of the utility model;

[0018] Figure 3 is a structure schematic diagram of the MR implant needle positioning assembly of the utility model;

[0019] Figure 4 is a structure schematic diagram of the MR implant needle developing core of the utility model;

[0020] Figure 5 is a structure schematic diagram of the MR implant needle developing core of the utility model;

[0021] Figure 6 is a structure schematic diagram of the MR implant needle developing core of the utility model;

[0022] REFERENCE SIGNS

[0023] 1. Developer; 11. First developer; 12. Second developer; 13. Third developer; 2. Solid plastic rod; 3. Hollow plastic tube; 4. Insertion needle body; 5. Insertion needle tip; 6. Needle tip length calibration ruler. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0025] It should be noted that the various installation methods and technical terms mentioned in this utility model are all well-known technical terms in the relevant technical field, and therefore will not be explained further. Furthermore, the same reference numerals are used for the same components, but this does not affect, nor should it constitute, an accurate understanding of the technical solution by those skilled in the art.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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 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.

[0027] Example 1

[0028] This embodiment provides an MR implantation needle, such as Figure 1 As shown, it includes an implantation needle body 4, an implantation needle tip 5, and a developing core. The implantation needle body 4 has a hollow internal structure, and the developing core is disposed within the hollow internal structure of the implantation needle body 4. Figure 2 As shown, the imaging core is a structure integrally formed from a solid plastic rod 2 and a hollow plastic tube 3 (in this embodiment, the solid plastic rod and hollow plastic tube are medical engineering plastic PC). The solid plastic rod 2 has a fixed length specification (length specification is 1-5cm). In this embodiment, the imaging core is encapsulated with three segments of fixed-length developing solution (first developing solution 11, second developing solution 12 and third developing solution 13) with the same encapsulation interval length. The developing solution 1 is physiological saline (physiological saline with added iodine as a staining agent), which can be developed under NMR.

[0029] Example 2

[0030] This embodiment provides an MR implantation needle. Compared to Embodiment 1, the difference lies in that the developing core in this embodiment encapsulates two sections of developing solution 1 of equal length, namely a first developing solution 11 and a second developing solution 12, as shown below. Figure 4 As shown.

[0031] Example 3

[0032] This embodiment provides an MR implantation needle and its positioning component, such as Figure 3 As shown, the positioning component is a needle tip length calibration ruler 6, including a fixing groove for placing the MR implantation needle, scales located on both sides of the fixing groove, and a needle tip reference line located at the top of the fixing groove. The difference compared to Embodiment 1 is that the developing core in this embodiment encapsulates a single-segment developing solution 1, such as... Figure 5 As shown.

[0033] Working principle:

[0034] By encapsulating one or more fixed-length developer solutions 1 within the developer core as a scale under MRI imaging, the developer solution 1 can be developed under MRI. The fixed-length developer solution is encapsulated at consistent intervals, allowing the developer solution position to be determined after inserting the MRI implantation needle. Then, the needle tip positioning calibration ruler 6 is used to measure the distance from the first liquid surface of the developer solution (the starting point of the first developer solution 11) to the needle tip, serving as a reference for calculating the needle tip position. Based on the length of the needle tip inserted into the human tissue, different lengths of developer cores are selected to adapt to implantation treatment in different scenarios.

[0035] The calculation process for the tip position of the MR implantation needle (as shown in Example 1) using the imaging core is as follows: Figure 6 As shown in the figure, Lm represents the distance from the radiation source to the farthest dwelling position (first dwelling position); Lc represents the length of the source center; Ls represents the safety gap (the gap between the original tip and the inner bottom of the MR implantation needle); Lp represents the needle tip length; Li represents the length of the needle tip inserted into the human tissue; LLa: represents the distance from the a-th liquid surface to the needle tip (the value of a is determined by the number of packaging segments of the developing solution; for three packaging segments, a = 1-6; for two packaging segments, a = 1-4; for one packaging segment, a = 1); the offset value represents the distance from the needle tip to the first dwelling position.

[0036] The tip positioning method for the developing core is as follows:

[0037] S1. Before inserting the implantation needle into the tissue through the vagina, first roughly determine the length of the needle tip inserted into the human tissue (Li size), and then select a solid plastic rod with a length greater than the Li size to ensure that the first liquid surface is outside the human tissue.

[0038] S2, insert a suitable developing core into the bottom of the MR implant needle and fix it, then put the implant needle into the needle tip positioning ruler to measure the length of the first liquid level distance from the needle tip (get the size of LL1).

[0039] S3, remove the developing core, insert the MR implant needle into the tissue, keep the needle body straight until the needle tip reaches the predetermined depth.

[0040] S4, insert the developing core used in step S2 into the bottom of the MR implant needle and fix it, make a nuclear magnetic resonance scan for the patient and get the image, and mark the accurate position of the needle tip in the human tissue through software based on the size of LL1. If the actual insertion depth of the implant needle during the implantation process is greater than the size of LL1, which causes the first liquid level to be invisible, then the length of the subsequent other encapsulation liquid level distance from the needle tip (i.e. the size of LLa) can be used as a reference point, and the accurate position of the needle tip in the human tissue can be marked through software based on the size of LLa, to ensure the accuracy of radiotherapy.

[0041] For those skilled in the art, the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application; therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0042] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, and any slight modification, equivalent replacement and improvement made according to the technical essence of the present application to the above embodiments should be included in the protection scope of the technical scheme of the present application.

Claims

1. An MR implantation needle imaging core, comprising a hollow tube and a solid structure encapsulated at one end of the hollow tube, characterized in that, The hollow tube contains a developing solution (1), which is physiological saline.

2. The MR implantation needle imaging core according to claim 1, characterized in that, The hollow tube and the solid structure are integrally formed.

3. The MR implantation needle imaging core according to claim 1, characterized in that, The developer (1) is packaged in a single-segment package or a multi-segment package.

4. The MR implantation needle imaging core according to claim 1 or 2, characterized in that, In the multi-segment packaging of the developer (1), each segment has the same length and the packaging interval is consistent.

5. The MR implantation needle imaging core according to claim 1 or 3, characterized in that, The developing solution (1) also contains iodine tincture as a staining agent.

6. The MR implantation needle imaging core according to claim 1, characterized in that, The solid structure is a solid plastic rod (2), and the hollow tube is a hollow plastic tube (3). Both the solid plastic rod (2) and the hollow plastic tube (3) are engineering plastics.

7. An MR implantation needle, characterized in that, It includes an implantation needle body (4), an implantation needle tip (5), and an MR implantation needle imaging core as described in any one of claims 1-6, wherein the MR implantation needle imaging core is disposed inside the implantation needle body (4).

8. An MR implantation needle positioning assembly, characterized in that, The MR implant needle and needle tip length calibration ruler (6) of claim 6, wherein the imaging core is disposed inside the MR implant needle and the needle tip length calibration ruler (6) is disposed outside the MR implant needle.

9. The MR implantation needle positioning assembly according to claim 8, characterized in that, The needle tip length calibration ruler (6) includes a fixed groove, a scale on both sides of the fixed groove, and a needle tip reference line at the top of the fixed groove.

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