A marker

Abstract

The utility model relates to medical instrument technical field. A kind of marker, including a marking main body, the marking main body includes at least two marking parts, and adjacent marking part is connected by elastic bending structure;The marking part appearance is columnar or cylindrical structure, and the axial length of the marking part is greater than radial length;The outer wall of the marking part is provided with openwork structure.The utility model by optimizing the structure of marking main body, it is convenient to guarantee that marker is placed into body after by elastic bending structure, bending is carried out, the anchoring effect is improved simultaneously, the demarcation of large area area is realized. Through the structure of marking part, further improve anchoring effect.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a marker. Background Technology

[0002] Traditional stereotactic radiotherapy techniques, such as Gamma Knife, typically rely on surface markers or external fixation devices to locate the radiation field. This method has inherent errors, especially when the patient moves slightly, potentially causing deviation from the radiation field, reducing treatment effectiveness, and possibly causing unnecessary damage. Currently, a new type of stereotactic radiotherapy device—CyberKnife—has emerged. CyberKnife is a synchronous radiotherapy device capable of real-time three-dimensional tracking of tumor location. It is currently the world's most advanced whole-body three-dimensional radiosurgery device. Its real-time target tracking is achieved through its built-in CT (Computed Tomography) positioning system, tracking the tumor location once per second and precisely adjusting the position and angle of the radiotherapy head based on the tracked location information. This allows for stereotactic radiotherapy with an accuracy within 1mm. To further enhance tumor location tracking, certain tumors with specific characteristics or locations (such as liver tumors and prostate tumors) often require percutaneous implantation of CT-sensitive markers, such as metal tracking markers (gold markers), to help the device achieve precise tumor location tracking.

[0003] Currently used markers have the following drawbacks: the shape of the markers cannot be changed, which is not conducive to ensuring the anchoring effect in vivo; and because the imaging area of ​​a single marker is small, it is not easy to be recognized by the equipment at certain imaging angles, resulting in poor marking effect. Utility Model Content

[0004] In view of the problems existing in the prior art, the present invention provides a marker to solve at least one of the above technical problems.

[0005] To achieve the above objectives, this utility model provides a marker, characterized in that it includes a marker body, the marker body including at least two marker elements, and adjacent marker elements are connected by an elastic bending structure;

[0006] The marking element has a columnar or cylindrical shape, and its axial length is greater than its radial length.

[0007] The outer wall of the marker is provided with a hollow structure.

[0008] This invention optimizes the structure of the marker body, facilitating bending through an elastic bending structure after the marker is inserted, thereby improving the anchoring effect and enabling calibration over a large area. The structure of the marker further enhances the anchoring effect.

[0009] More preferably, the opposite sides of the marker are provided with holes arranged along the axial direction, and the holes form the hollow structure.

[0010] More preferably, the marking element is a spring-like structure formed by spiral bending of metal wire, with the gap between adjacent spring coils of the spring-like structure forming the hollow structure.

[0011] More preferably, the marking element includes a first ring and a second ring located at both ends of the axial direction. The first ring and the second ring are connected by circumferentially arranged connecting wires. The connecting wires are S-shaped and the gap between adjacent connecting wires forms the hollow structure.

[0012] More preferably, the elastic bending structure is a shape memory alloy or a biocompatible metal material such as gold, platinum, tungsten, or tantalum.

[0013] Once the marker is implanted in the human body, the elastic bending structure will return from a straight line to its original bent state, thus serving as an anchor.

[0014] More preferably, it also includes a replacement core for receiving the marker body, the replacement core having an axially penetrating through hole, the through hole including a storage groove and an inlet groove that are sequentially connected along the axial direction, the marker body being fixed in the storage groove, and the inlet groove being used to push the marker body into the storage groove along the axial direction.

[0015] More preferably, the end of the storage groove away from the inlet groove is connected to the marking body via paraffin wax.

[0016] More preferably, it also includes a needle core disposed inside and outside, and an outer tube of a puncture needle;

[0017] The puncture needle outer tube includes an outer needle tube and an outer needle seat connected sequentially along the axial direction. The outer needle seat has a replacement groove for axially inserting the replacement core.

[0018] When the replacement core is inserted into the replacement slot, the through hole is aligned with the inner cavity of the outer needle tube, and the through hole and the inner cavity of the outer needle tube are connected to form a channel for guiding the insertion of the needle core.

[0019] More preferably, the outer needle tube and the outer needle seat are arranged front and rear;

[0020] The replacement groove is a tapered groove with an increasing inner diameter from front to back;

[0021] The replacement core includes a tapered insertion portion that matches the tapered groove, and the rear end of the tapered insertion portion is provided with a radially outwardly extending extension portion;

[0022] The front and rear sides of the extension respectively abut against the outer needle seat and the needle core.

[0023] The extension facilitates the removal and installation of the filling mechanism, while also enabling the positioning of the relative positions of the filling mechanism, the outer needle seat, and the needle core.

[0024] More preferably, the needle core includes an inner needle body and an inner needle seat arranged at the front and rear.

[0025] When the front end of the inner needle seat abuts against the extension and the rear end of the outer needle seat abuts against the extension, the front end of the inner needle body is flush with the needle tip of the outer needle tube.

[0026] Beneficial effects:

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0028] 1. In lung applications, due to the porous texture of the organ, traditional markers are prone to displacement within the lungs. The marker body of this invention has excellent "anchoring" performance. After being implanted in the human body, it is not easy for it to move with human movement and breathing, thus avoiding displacement of the radiotherapy target area and improving the accuracy and therapeutic effect of stereotactic radiotherapy for tumors in the body.

[0029] 2. Equipped with a replacement core, the marker body is pre-loaded into the replacement core. Only the replacement core needs to be replaced for quick and convenient loading and implantation of the next marker. The marker body is pre-loaded into the replacement core before surgery, allowing for rapid replacement of the loading device for secondary implantation during the procedure.

[0030] 3. By inserting the replacement core axially, the loading direction of the replacement core is consistent with the pushing direction of the puncture needle, thus avoiding the problem of jamming during the pushing process of the marking body. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the marking body in specific embodiment 1 of this utility model;

[0032] Figure 2 This is a schematic diagram of the structure of the marking body in a specific embodiment 2 of this utility model;

[0033] Figure 3 This is a schematic diagram of the structure of the marking body in specific embodiment 3 of this utility model;

[0034] Figure 4 This is a cross-sectional view of the replacement core, puncture needle outer tube, and needle core in the assembled state of a specific embodiment 4 of this utility model;

[0035] Figure 5 This is an exploded view of the replacement core, puncture needle outer tube, and needle core assembly in specific embodiment 4 of this utility model;

[0036] Figure 6 This is an anatomical view of the replacement core and the outer tube of the puncture needle in specific embodiment 4 of this utility model;

[0037] Figure 7 This is a schematic diagram of the replacement core in specific embodiment 4 of this utility model.

[0038] Wherein: 1 is the replacement core, 2 is the outer tube of the puncture needle, 3 is the needle core, 4 is the marking body, 1.1 is the extension, 1.2 is the inlet groove, 1.3 is the storage groove, 2.1 is the outer needle seat, 2.11 is the replacement groove, 2.2 is the outer needle tube, 3.1 is the inner needle seat, 3.2 is the inner needle body, 4.1 is the marking element, 4.2 is the elastic bending structure, 4.11 is the hole, 4.12 is the first ring, 4.13 is the second ring, and 4.14 is the connecting wire. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings.

[0040] See Figure 1 Specific Embodiment 1: A marker includes a marker body, which comprises at least two marker elements connected by an elastic bending structure 4.2. The marker elements 4.1 have a columnar or cylindrical shape, with an axial length greater than their radial length. The outer wall of the marker elements 4.1 has a perforated structure. This invention optimizes the structure of the marker body, facilitating bending via the elastic bending structure 4.2 after the marker is inserted, thus improving the anchoring effect and enabling large-area calibration. The structure of the marker elements further enhances the anchoring effect.

[0041] The elastic bending structure 4.2 is made of shape memory alloy or biocompatible metal materials such as gold, platinum, tungsten, and tantalum. When the marker is implanted in the human body, the elastic bending structure will return from a straight shape to its original bent state, thus providing anchoring.

[0042] Marker 4.1 is a spring-like structure formed by spiral bends of metal wire, with the gaps between adjacent spring coils creating a hollow structure. The metal wire can be gold wire.

[0043] See Figure 2 In specific embodiment 2, based on specific embodiment 1, the difference is that the opposite side of the marker 4.1 is provided with holes arranged along the axial direction, with the holes forming a hollow structure.

[0044] See Figure 3In specific embodiment 3, based on specific embodiment 1, the difference lies in that the marking element 4.1 includes a first ring 4.12 and a second ring 4.13 located at both ends of the axial direction. The first ring 4.12 and the second ring 4.13 are connected by circumferentially arranged connecting wires 4.14. The connecting wires 4.14 are S-shaped bends, and the gaps between adjacent connecting wires 4.14 with a spring-like structure form a hollow structure. The first ring, the second ring, and the connecting wires can be made of gold.

[0045] See Figures 4 to 7 In specific embodiment 4, based on specific embodiment 1, a replacement core 1 for housing the marker body 4 is further included. The replacement core 1 has an axially penetrating through hole, which includes a storage groove 1.3 and an inlet groove 1.2 that are sequentially connected along the axial direction. The marker body 4 is fixed in the storage groove 1.3, and the inlet groove 1.2 is used to push the marker body 4 into the storage groove 1.3 along the axial direction. The end of the storage groove 1.3 away from the inlet groove 1.2 is connected to the marker body 4 through paraffin wax.

[0046] It also includes a needle core 3 disposed inside and outside, and a puncture needle outer tube 2; the puncture needle outer tube 2 includes an outer needle tube 2.2 and an outer needle seat 2.1 connected sequentially along the axial direction. The outer needle seat 2.1 has a replacement groove 2.11 for axially inserting the replacement core 1; when the replacement core 1 is inserted into the replacement groove 2.11, the through hole is directly facing the inner cavity of the outer needle tube 2.2, and the through hole and the inner cavity of the outer needle tube 2.2 are connected to form a channel for guiding the insertion of the needle core 3.

[0047] The outer needle tube 2.2 and the outer needle seat 2.1 are arranged at the front and rear, respectively; the replacement groove 2.11 is a tapered groove with an increasing inner diameter from front to back; the replacement core 1 includes a tapered insertion part that matches the tapered groove, and the rear end of the tapered insertion part is provided with a radially outwardly extending extension 1.1; the front and rear sides of the extension 1.1 respectively abut against the outer needle seat 2.1 and the needle core 3. The extension 1.1 facilitates the removal and installation of the filling mechanism, and also facilitates the positioning of the relative positions of the filling mechanism, the outer needle seat 2.1 and the needle core 3.

[0048] The needle core 3 includes an inner needle body 3.2 and an inner needle seat 3.1 arranged at the front and rear. When the front end of the inner needle seat 3.1 abuts against the extension 1.1 and the rear end of the outer needle seat 2.1 abuts against the extension 1.1, the front end of the inner needle body 3.2 is flush with the needle tip of the outer needle tube 2.2.

[0049] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A marker, characterized in that, It includes a marking body, the marking body includes at least two marking elements, and adjacent marking elements are connected by an elastic bending structure; The marking element has a columnar or cylindrical shape, and its axial length is greater than its radial length. The outer wall of the marker is provided with a hollow structure.

2. A marker according to claim 1, characterised in that: The marker has holes arranged along the axial direction on opposite sides, forming the hollow structure.

3. The marker of claim 1, wherein: The marking element is a spring-like structure formed by spiral bending of metal wire, with the gap between adjacent spring coils of the spring-like structure forming the hollow structure.

4. The marker of claim 1, wherein: The marking element includes a first ring and a second ring located at both ends of the axial direction. The first ring and the second ring are connected by circumferentially arranged connecting wires. The connecting wires are S-shaped and the gap between adjacent connecting wires forms the hollow structure.

5. The marker of claim 1, wherein: It also includes a replacement core for receiving the marker body. The replacement core has an axially penetrating through hole. The through hole includes a storage groove and an inlet groove that are sequentially connected along the axial direction. The marker body is fixed in the storage groove. The inlet groove is used to push the marker body into the storage groove along the axial direction.

6. A marker according to claim 5, wherein: The end of the storage slot away from the inlet slot is connected to the marking body via paraffin wax.

7. A marker according to claim 5, wherein: It also includes the needle core with internal and external settings, as well as the outer tube of the puncture needle; The puncture needle outer tube includes an outer needle tube and an outer needle seat connected sequentially along the axial direction. The outer needle seat has a replacement groove for axially inserting the replacement core. When the replacement core is inserted into the replacement slot, the through hole is aligned with the inner cavity of the outer needle tube, and the through hole and the inner cavity of the outer needle tube are connected to form a channel for guiding the insertion of the needle core.

8. A marker according to claim 7, characterised in that: The outer needle tube and the outer needle seat are arranged in front and behind; The replacement groove is a tapered groove with an increasing inner diameter from front to back; The replacement core includes a tapered insertion portion that matches the tapered groove, and the rear end of the tapered insertion portion is provided with a radially outwardly extending extension portion; The front and rear sides of the extension respectively abut against the outer needle seat and the needle core.

9. A marker according to claim 8, characterised in that: The needle core includes an inner needle body and an inner needle seat arranged at the front and rear; When the front end of the inner needle seat abuts against the extension and the rear end of the outer needle seat abuts against the extension, the front end of the inner needle body is flush with the needle tip of the outer needle tube.

Images