Marker implantation device

Abstract

The utility model relates to the technical field of medical instruments. The marker implanting device comprises a puncture needle outer tube, a needle core, a marker and a filling mechanism, the puncture needle outer tube comprises an outer needle tube and an outer needle base which are connected in sequence, a guide positioning groove used for being axially inserted into the filling mechanism is formed in the outer needle base, and the guide positioning groove is in butt joint and communicated with an inner cavity of the outer needle tube; a through hole is formed in an inner cavity of the filling mechanism, the through hole comprises a storage groove used for storing markers and a guide-in groove used for pushing the markers into the storage cavity, the guide-in groove and the storage groove are in butt joint and communicated, the storage groove and an inner cavity of the outer needle tube are in butt joint and communicated, and the through hole and the outer needle tube are in butt joint and communicated to form a channel used for guiding a needle core to be inserted. According to the utility model, through the arrangement of the filling mechanism, the filling process of the marker is simplified, and the marker can be conveniently pushed to a target position through the needle core after being quickly filled. According to the utility model, the marker can be implanted for multiple times through one-time puncture, so that the puncture frequency of a patient is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a marker implantation device. Background Art

[0002] Traditional stereotactic radiotherapy techniques, such as the Gamma Knife, typically rely on surface markers or external fixators to help locate the radiotherapy field. This positioning method is subject to certain errors, especially when the patient moves slightly, which can cause deviation from the radiation field. This not only reduces treatment effectiveness but also may cause unnecessary injury. A new stereotactic radiotherapy device, the CyberKnife, has recently emerged. It is a synchronized radiotherapy device that can achieve real-time three-dimensional tracking of tumor position. It is currently the world's most advanced whole-body three-dimensional radiosurgery device. This method achieves real-time target tracking through the device's built-in CT (Computed Tomography) positioning system, which tracks the tumor position once per second. Based on this tracked position information, the position and angle of the radiotherapy head are precisely adjusted, enabling stereotactic radiotherapy with an accuracy of within 1mm. To better track tumor position, certain tumors with unique properties or locations (such as liver and prostate tumors) often require percutaneous implantation of CT-sensitive markers, such as metal tracking markers (gold markers), to help the device accurately track the tumor position.

[0003] The currently commonly used human radiotherapy tracking marker implant devices have the following disadvantages:

[0004] For example, the utility model patent with publication number CN 104665897B describes a CyberKnife tracking device embedded in a puncture needle to prevent pneumothorax. After the puncture, the device removes the needle and injects liquid bioglue to prevent air from entering and causing a pneumothorax. However, this device suffers from a limitation in that it cannot rapidly load the marker, making it difficult to do so.

[0005] For example, the utility model patent disclosed with publication number CN 203138573U designs a stereoscopic radiotherapy tracking marker implantation device. The patent discloses the need to repeatedly load markers. However, the patent requires that the markers be loaded into the marker loading holes. Smaller markers need to be placed into the marker loading holes, and the operation requires great precision, which delays the operation time. Therefore, the patent cannot achieve rapid loading of markers, and loading is relatively difficult.

[0006] In summary, there is currently a lack of a marker placement device that can achieve rapid loading of markers. Utility Model Content

[0007] In response to the problems existing in the prior art, the present invention provides a marker implantation device, which has solved at least one of the above technical problems.

[0008] The technical solution of the utility model is: a marker implantation device, characterized in that it comprises a puncture needle outer tube, a needle core, a marker and a filling mechanism;

[0009] The puncture needle outer tube includes an outer needle tube and an outer needle seat connected in sequence along the axial direction, and a guide positioning groove is provided on the outer needle seat. The two ends of the guide positioning groove in the axial direction are connected through the guide positioning groove, and the axial opening of the guide positioning groove is connected to the inner cavity of the outer needle tube and the filling mechanism.

[0010] The inner cavity of the filling mechanism is provided with a through hole, which includes a storage groove for storing the marker and an introduction groove for pushing the marker into the storage cavity. The introduction groove is connected to the storage groove, the storage groove is connected to the inner cavity of the outer needle tube, and the through hole is connected to the outer needle tube to form a channel for guiding the insertion of the needle core.

[0011] The utility model simplifies the marker loading process by setting a loading mechanism, facilitates the rapid loading of the marker and pushes it into the target position through the needle core. The utility model realizes multiple implantation of markers in one puncture, greatly reducing the number of punctures for the patient.

[0012] Further preferably, one end of the storage tank away from the introduction tank is connected to the marker through paraffin.

[0013] This facilitates the securing of markers within the loading mechanism by using harmless paraffin wax to fuse with the markers and prevent them from falling out. The paraffin wax prevents the markers from getting stuck during delivery and acts as a lubricant. It also seals the delivery channel, reducing air ingress and preventing pneumothorax.

[0014] Further preferably, the outer needle tube and the outer needle seat are arranged front and back;

[0015] The guide positioning groove is a tapered groove with an inner diameter increasing from front to back;

[0016] The loading mechanism includes a tapered insert portion matching the tapered groove, and a rear end portion of the tapered insert portion is provided with an extension portion extending radially outward;

[0017] The front and rear sides of the extension portion respectively abut against the outer needle seat and the needle core.

[0018] The extension portion facilitates the taking and installation of the filling mechanism and facilitates the positioning of the relative positions of the filling mechanism, the outer needle seat and the needle core.

[0019] Further preferably, the needle core includes an inner needle body and an inner needle seat arranged front and back;

[0020] When the front end of the inner needle seat abuts against the extension portion, and the rear end of the outer needle seat abuts against the extension portion, the front end of the inner needle body is flush with the needle tip of the outer needle tube.

[0021] Further preferably, the marker comprises a gold mark and an anchor for anchoring the gold mark;

[0022] The gold label is sleeved on the outer side of the anchoring piece, and the anchoring piece includes a gold label attachment area for sleeved with the gold label, and the anchoring piece is provided with an angle-adjustable elastic bending structure in the area outside the gold label attachment area;

[0023] Alternatively, the anchoring structure is fixed to the outer side of the gold label.

[0024] As a preferred solution, the marker includes a shape memory alloy column arranged inside and outside and a gold label in the shape of a coil spring;

[0025] The shape memory alloy column includes an inner column located in the gold mark and an extension structure extending axially from both ends of the gold mark, wherein the extension structure is an elastic bending structure;

[0026] When the marker is stored in the storage slot, the bending structure is in a folded state;

[0027] When the marker is pushed out of the storage groove, the bending structure is elastically deformed into an unfolded state.

[0028] When the marker is pushed out of the storage slot, the bent structure elastically deforms and expands to fix the marker, preventing the marker from shifting with the human body's breathing. In this solution, the shape memory alloy column serves as an anchor.

[0029] As another preferred embodiment, the marker comprises an inner and outer cylindrical body and two spirally arranged gold winding structures;

[0030] The two gold winding structures have the same spiral direction and the same pitch, and the spiral turns of the two gold winding structures are adjacent to each other.

[0031] To increase the overall friction of the gold label and provide better anchoring performance, the cylinder in this solution serves as the anchor and the gold wrapping structure serves as the gold label.

[0032] As another preferred embodiment, the marker includes a shape memory alloy column disposed inside and outside and a gold label in the shape of a coil spring;

[0033] There are two shape memory alloy columns, which are a first alloy column and a second alloy column.

[0034] The first alloy column and the second alloy column each include an inner column located within the gold mark and an extension structure axially extending out of both ends of the gold mark, wherein the extension structure is an elastic bending structure;

[0035] When the marker is stored in the storage tank, the bending structure is a U-shaped structure, the bending structures of the first alloy column and the second alloy column are partially in close contact, and the bending directions are different;

[0036] When the marker is pushed out of the storage groove, the bent structure is elastically deformed into an L-shaped structure, and the bent structures of the first alloy column and the second alloy column are in an anchor hook shape.

[0037] When the marker is pushed out of the storage slot, the bent structure elastically deforms and expands to fix the marker, preventing the marker from shifting with the human body's breathing. In this solution, the shape memory alloy column serves as an anchor.

[0038] As another preferred solution, the marker comprises a gold mark in the shape of a coil spring, and the outer wall of the gold mark is fixedly connected to a villi-shaped anchoring structure.

[0039] The fuzzy anchoring structure on the surface increases the friction of the gold mark to achieve the "anchoring" effect.

[0040] In this solution, the anchoring structure is an anchoring piece.

[0041] As another preferred embodiment, the marker includes a shape memory alloy column, the shape memory alloy column including a first fixing portion and a second fixing portion for fixing the spirally arranged gold winding structure, the first fixing portion and the second fixing portion being connected via an elastic bending portion;

[0042] When the marker is stored in the storage groove, the included angle between the first fixing portion and the second fixing portion is greater than the included angle between the first fixing portion and the second fixing portion when the marker is pushed out of the storage groove.

[0043] In this solution, the shape memory alloy column serves as an anchor.

[0044] When the marker is implanted into the human body, the shape memory alloy column will return to its original bent state, thus fixing the marker.

[0045] Further preferably, the shape memory alloy column is a nickel-titanium shape memory alloy column.

[0046] The method for implanting a marker implantation device comprises the following steps:

[0047] 1) Implantation of the first marker,

[0048] A marker is pre-installed in the front end of the outer tube of the puncture needle, and the marker is fixed to the head end of the outer tube of the puncture needle by paraffin;

[0049] Insert the outer tube of the puncture needle, and then insert the needle core from the guide slot of the filling mechanism. Before insertion, ensure that the outer needle seat of the puncture needle outer tube is equipped with a filling mechanism without a marker, and then push the needle core until the marker at the front end of the outer needle tube of the puncture needle outer tube is pushed out and reaches the target area;

[0050] 2) Implantation of subsequent markers,

[0051] Remove the needle core from the filling mechanism, replace the filling mechanism pre-loaded with a marker, insert the needle core from the introduction slot of the filling mechanism, and push the marker out of the outer tube of the puncture needle to reach the target area.

[0052] Specifically,

[0053] When the marker is implanted for the first time, a marker is pre-installed inside the front end of the outer needle tube of the puncture needle outer tube. The marker at the front end of the outer needle tube is the first marker, and the first marker is fixed to the head end of the puncture needle outer tube by paraffin.

[0054] The outer needle holder of the puncture needle outer tube is pre-installed with a loading mechanism without a marker installed. The puncture needle outer tube without a needle core is inserted into the puncture needle outer tube to the target area near or inside the tumor of the human body. Then, the needle core is inserted through the introduction groove of the loading mechanism and pushed forward until the marker at the front end of the outer needle tube of the puncture needle outer tube is pushed out and reaches the designated area of the tumor, thus completing the implantation of the first marker.

[0055] Alternatively, it further comprises a stopper for radially engaging the inner needle body of the needle core;

[0056] The outer needle holder of the puncture needle outer tube is pre-installed with a filling mechanism without a marker. The needle core is passed through the puncture needle outer tube, and the stopper is sandwiched between the inner needle holder of the needle core and the filling mechanism. The puncture needle outer tube and the needle core are inserted together into the target area near or inside the human tumor. Then, the stopper is removed and the needle core is advanced until the marker at the front end of the outer needle tube of the puncture needle outer tube is pushed out and reaches the designated area of the tumor, thus completing the implantation of the first marker.

[0057] When multiple markers need to be implanted, first, the original needle core needs to be withdrawn from the loading mechanism and the loading mechanism removed; then, the loading mechanism pre-loaded with markers is loaded into the outer needle seat of the outer tube; then, the needle core is inserted from the introduction slot of the loading mechanism, and the needle core is pushed forward until the marker slides into the outer needle tube of the puncture needle outer tube, and the needle core is continued to be pushed forward until the front end of the needle core is level with the needle tip of the puncture needle outer tube, and the marker is pushed out of the puncture needle outer tube to the designated area of the tumor, thereby completing the implantation of the second marker.

[0058] For subsequent marker implantation, the need for repeated punctures is eliminated. The operator simply withdraws the needle core, removes the unmarked loading mechanism, and installs the loaded loading mechanism into the outer needle hub of the puncture needle outer tube. Repeating the marker insertion steps, subsequent marker implantation is achieved with precision. This process can be repeated, enabling multiple implantations with a single puncture, improving treatment efficiency and accuracy while reducing additional patient injury and the risk of pneumothorax.

[0059] Compared with the prior art, the present invention has the following beneficial effects:

[0060] 1. In lung applications, traditional markers are prone to displacement due to the loose texture of the organ. The markers in this solution have a unique "anchoring" structure and excellent "anchoring" performance. After implantation into the human body, they are not easily moved with human movement and breathing, resulting in deviation from the radiotherapy target area, thereby improving the accuracy and treatment effect of stereotactic radiotherapy for body tumors.

[0061] 2. Convenient marker loading and implantation. A loading mechanism is provided, and the marker is pre-loaded in the loading mechanism. Only the loading mechanism needs to be replaced to quickly and conveniently load and implant the next marker. The marker is pre-loaded in the loading mechanism before the operation, and the loading device can be quickly replaced during the operation for a second implantation.

[0062] 3. By axially inserting the loading mechanism, the loading direction of the loading mechanism is ensured to be consistent with the pushing direction of the puncture needle, avoiding the problem of the marker getting stuck during the pushing process. This utility model can implant multiple markers with a single puncture, reducing the number of punctures, reducing harm to the human body, and lowering the risk of "pneumothorax". BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 This is a cross-sectional view of a specific embodiment 1 of the present utility model;

[0064] Figure 2 This is a structural diagram of a specific embodiment 1 of the present utility model;

[0065] Figure 3 This is an exploded view of the specific embodiment 1 of the present utility model;

[0066] Figure 4 This is an exploded view of the specific embodiment 1 of the present utility model;

[0067] Figure 5 This is a structural diagram of a filling mechanism according to a specific embodiment 1 of the present invention;

[0068] Figure 6 This is a schematic diagram of the structure of a marker in a specific embodiment 2 of the present invention when it is stored in a filling mechanism;

[0069] Figure 7 This is a structural diagram of a specific embodiment 2 of the present invention after the marker is pushed out of the loading mechanism;

[0070] Figure 8 This is a schematic structural diagram of a marker in specific embodiment 3 of the present utility model;

[0071] Figure 9 This is a schematic structural diagram of a specific embodiment 4 of the present invention when a marker is stored in a filling mechanism;

[0072] Figure 10 This is a structural diagram of a specific embodiment 4 of the present invention after the marker is pushed out of the loading mechanism;

[0073] Figure 11 This is a structural diagram of a specific embodiment 4 of the present invention after the marker is pushed out of the loading mechanism;

[0074] Figure 12 This is a schematic structural diagram of a marker in specific embodiment 5 of the present utility model;

[0075] Figure 13 This is a cross-sectional view of a marker and a filling mechanism in combination in a specific embodiment 6 of the present invention;

[0076] Figure 14 This is a structural diagram of a specific embodiment 6 of the present invention after the marker is pushed out of the loading mechanism;

[0077] Figure 15 This is a structural diagram of a specific embodiment 1 of the utility model with a limiter;

[0078] Figure 16 For the specific embodiment 1 of the utility model Figure 15 Exploded view of the structure. DETAILED DESCRIPTION

[0079] See also Figures 1 to 5, Specific embodiment 1, a marker implantation device, comprising a puncture needle outer tube 2, a needle core 3, a marker 4 and a filling mechanism 1; the puncture needle outer tube 2 comprises an outer needle tube 2.2 and an outer needle seat 2.1 connected in sequence, the outer needle seat 2.1 is provided with a guide positioning groove 2.11 for axially inserting the filling mechanism 1, the axial ends of the guide positioning groove 2.11 pass through and are connected, the axial opening of the guide positioning groove 2.11 is docked and connected with the inner cavity of the outer needle tube 2.2 and the filling mechanism; a through hole is provided in the inner cavity of the filling mechanism 1, the through hole comprises a storage groove 1.3 for storing the marker 4 and an introduction groove 1.2 for pushing the marker 4 into the storage cavity, the introduction groove 1.2 is docked and connected with the storage groove 1.3, the storage groove 1.3 is docked and connected with the inner cavity of the outer needle tube 2.2, and the through hole is docked and connected with the outer needle tube 2.2 to form a channel for guiding the insertion of the needle core 3. The present invention simplifies the loading process of the marker 4 by setting the loading mechanism 1, and facilitates the rapid loading of the marker 4 and the insertion of the marker into the target position through the needle core 3. The present invention realizes multiple implantations of the marker 4 in one puncture, greatly reducing the number of punctures for the patient.

[0080] The end of the storage slot 1.3, remote from the introduction slot 1.2, is connected to the marker 4 via paraffin wax. This facilitates securing the marker 4 within the loading mechanism 1. The harmless paraffin wax fuses with the marker 4 to secure it, preventing the pre-installed marker 4 from falling out. The paraffin wax prevents the marker from getting stuck during delivery and acts as a lubricant. It also seals the delivery channel, reducing gas ingress and preventing pneumothorax.

[0081] The outer needle tube 2.2 and outer needle hub 2.1 are arranged in a front-to-rear arrangement. The guide and positioning groove 2.11 is a tapered groove with an increasing inner diameter from front to back. The loading mechanism 1 includes a tapered insert portion that matches the tapered groove. The rear end of the tapered insert portion is provided with an extension portion 1.1 extending radially outward. The front and rear sides of the extension portion 1.1 respectively abut against the outer needle hub 2.1 and the needle core 3. The extension portion 1.1 facilitates the removal and installation of the loading mechanism 1 and facilitates the relative positioning of the loading mechanism 1, outer needle hub 2.1, and needle core 3.

[0082] The needle core 3 includes an inner needle body 3.2 and an inner needle seat 3.1 arranged front and back; when the front end of the inner needle seat 3.1 abuts against the extension part 1.1 and the rear end of the outer needle seat 2.1 abuts against the extension part 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.

[0083] The method for implanting a marker implantation device comprises the following steps:

[0084] 1) Implantation of the first marker;

[0085] A marker 4 is pre-installed inside the front end of the outer needle tube 2.2 of the puncture needle outer tube 2, and the marker 4 is fixed to the head end of the puncture needle outer tube 2 by paraffin;

[0086] Insert the outer tube 2 of the puncture needle, and then insert the needle core 3 from the introduction slot of the filling mechanism 1. Before insertion, make sure that the outer needle seat 2.1 of the puncture needle outer tube 2 is installed with a filling mechanism 1 without a marker, and then push the needle core 3 until the marker at the front end of the outer needle tube of the puncture needle outer tube 2 is pushed out and reaches the target area;

[0087] 2) implantation of subsequent markers;

[0088] Remove the needle core from the filling mechanism 1, replace the filling mechanism 1 pre-loaded with the marker, insert the needle core 3 from the introduction slot of the filling mechanism 1, and push the marker 4 out of the puncture needle outer tube 2 to reach the target area.

[0089] The specific steps can be as follows:

[0090] When the marker 4 is implanted for the first time, a marker 4 is pre-installed inside the front end of the outer needle tube 2.2 of the puncture needle outer tube 2. The marker at the front end of the outer needle tube is the first marker, which is fixed to the head end of the puncture needle outer tube by paraffin.

[0091] The outer needle holder 2.1 of the puncture needle outer tube 2 is pre-installed with a loading mechanism 1 without a marker 4 installed. The puncture needle outer tube 2 is inserted into the target area near or inside the tumor in the human body without a needle core. Then, the needle core 3 is inserted through the introduction groove 1.2 of the loading mechanism 1 and pushed forward until the marker 4 at the front end of the outer needle tube 2.2 of the puncture needle outer tube 2 is pushed out and reaches the designated area of the tumor, thus completing the implantation of the first marker 4.

[0092] Alternatively, see Figure 15 as well as Figure 16 , further comprising a stopper 5 for radially clamping the inner needle body 3.2 of the needle core; the outer needle seat of the puncture needle outer tube is pre-installed with a loading mechanism without a marker, the needle core is passed through the puncture needle outer tube, and the stopper 5 is sandwiched between the inner needle seat 3.1 of the needle core and the loading device; the puncture needle outer tube and the needle core are inserted together into the target area near or inside the human tumor, then the stopper 5 is removed, and the needle core is advanced until the marker at the front end of the outer needle tube of the puncture needle outer tube is pushed out and reaches the designated area of the tumor, thus completing the implantation of the first marker;

[0093] When multiple markers 4 need to be implanted, first, the original needle core 3 needs to be withdrawn from the loading mechanism 1, and then the loading mechanism 1 is removed by holding the loading mechanism 1 with one hand; then, the loading mechanism 1 pre-loaded with the marker 4 is loaded into the outer needle seat 2.1 of the outer tube; then, the needle core 3 is inserted from the introduction groove 1.2 of the loading mechanism 1, and the needle core 3 is pushed forward until the marker 4 slides into the outer needle tube 2.2 of the puncture needle outer tube 2, and the needle core 3 is continued to be pushed until the front end of the needle core 3 is level with the needle tip of the puncture needle outer tube 2, and the marker 4 is pushed out of the puncture needle outer tube 2 to reach the designated area of the tumor, thereby completing the implantation of the second marker 4.

[0094] For subsequent implantation of marker 4, the need for repeated punctures is avoided. The operator simply withdraws the needle core 3, removes the loading mechanism 1 without the marker 4, and installs the loading mechanism 1 with the marker 4 onto the outer needle hub 2.1 of the puncture needle outer tube 2. Repeating the marker 4 pushing steps, the subsequent marker 4 can be accurately implanted. This process can be repeated, enabling multiple implantations with a single puncture, improving treatment efficiency and accuracy while reducing additional harm to the patient and the risk of pneumothorax.

[0095] See also Figure 6 as well as Figure 7 Specific embodiment 2, based on specific embodiment 1, comprises a shape memory alloy column 4.12 disposed internally and externally and a coil spring-shaped gold mark 4.11. The shape memory alloy column 4.12 comprises an inner cylindrical body positioned within the gold mark 4.11 and an extension structure extending axially beyond both ends of the gold mark 4.11. The extension structure is an elastically flexing structure. When the marker is stored in the storage slot 1.3, the flexing structure is a U-shaped structure. When the marker is released from the storage slot 1.3, the flexing structure elastically deforms into an L-shaped structure. When the marker is released from the storage slot 1.3, the flexing structure elastically deforms and expands, securing the marker and preventing it from shifting with human breathing. The shape memory alloy column is a nickel-titanium shape memory alloy column.

[0096] See also Figure 8 Specific embodiment 3, based on specific embodiment 1, includes a cylindrical body 4.21 disposed inside and outside and two spirally wound gold structures 4.22. The two spirals of the gold winding structures 4.22 have the same spiral direction and pitch, and the spiral turns of the two gold winding structures 4.22 are arranged adjacent to each other. This increases the overall friction of the gold marker and provides better "anchoring" performance. The cylindrical body is a gold cylinder.

[0097] See also Figure 9 、 Figure 10 as well as Figure 11Specific embodiment 4, based on specific embodiment 1, comprises a shape memory alloy column 4.12 disposed internally and externally and a gold mark 4.11 in the shape of a coil spring. Two shape memory alloy columns are provided, a first column and a second column. Each of the first column and the second column comprises an inner cylindrical body positioned within the gold mark and an extension structure extending axially beyond the ends of the gold mark. The extension structure is an elastic bending structure. When the marker is stored in the storage slot 1.3, the bending structure is a U-shaped structure, with the bending structures of the first and second columns partially abutting each other and bending in different directions. When the marker is released from the storage slot 1.3, the bending structure elastically deforms into an L-shaped structure, with the bending structures of the first and second columns forming an anchor hook shape. When the marker is released from the storage slot 1.3, the bending structure elastically deforms and expands, securing the marker and preventing it from shifting with human breathing. The shape memory alloy columns are nickel-titanium shape memory alloy columns.

[0098] See also Figure 12 In a fifth embodiment, based on the first embodiment, the marker 4 comprises a gold tag in the shape of a coil spring, and a fuzzy anchoring structure is fixedly connected to the outer wall of the gold tag. The fuzzy anchoring structure on the surface increases the friction of the gold tag, thereby achieving an "anchoring" effect.

[0099] See also Figure 13 as well as Figure 14 Specific embodiment 6, based on specific embodiment 1, the marker 4 includes a shape memory alloy column, and the shape memory alloy column includes a first fixing portion and a second fixing portion for fixing the spirally arranged gold winding structure, and the first fixing portion and the second fixing portion are connected by an elastic bending portion; when the marker is stored in the storage slot 1.3, the angle between the first fixing portion and the second fixing portion is greater than the angle between the first fixing portion and the second fixing portion when the marker is pushed out of the storage slot 1.3. When the marker is implanted in the human body, the shape memory alloy column will return to its original bent state, playing the role of fixing the marker. The shape memory alloy column is a nickel-titanium shape memory alloy column. The first fixing portion and the second fixing portion are easily identified under radiation, and the first fixing portion and the second fixing portion are at a certain angle, which increases the directional dimension information, and can better identify the area that needs to receive radiotherapy in the marked direction.

[0100] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A marker implantation device, characterized in that: It includes a puncture needle outer tube, a needle core, a marker and a filling mechanism; The puncture needle outer tube includes an outer needle tube and an outer needle seat connected in sequence along the axial direction, and a guide positioning groove is provided on the outer needle seat. The two ends of the guide positioning groove in the axial direction are connected through the guide positioning groove, and the axial opening of the guide positioning groove is connected to the inner cavity of the outer needle tube and the filling mechanism. The inner cavity of the filling mechanism is provided with a through hole, which includes a storage groove for storing the marker and an introduction groove for pushing the marker into the storage cavity. The introduction groove is connected to the storage groove, the storage groove is connected to the inner cavity of the outer needle tube, and the through hole is connected to the outer needle tube to form a channel for guiding the insertion of the needle core.

2. The marker implantation device according to claim 1, characterized in that: One end of the storage tank away from the introduction tank is connected to the marker through paraffin.

3. The marker implantation device according to claim 1, wherein: The outer needle tube and the outer needle seat are arranged front and back; The guide positioning groove is a tapered groove with an inner diameter increasing from front to back; The loading mechanism includes a tapered insert portion matching the tapered groove, and a rear end portion of the tapered insert portion is provided with an extension portion extending radially outward; The front and rear sides of the extension portion respectively abut against the outer needle seat and the needle core.

4. The marker implantation device according to claim 3, characterized in that: The needle core includes an inner needle body and an inner needle seat arranged in front and back; When the front end of the inner needle seat abuts against the extension portion, and the rear end of the outer needle seat abuts against the extension portion, the front end of the inner needle body is flush with the needle tip of the outer needle tube.

5. The marker implantation device according to claim 1, characterized in that: The marker includes a gold mark and an anchor for anchoring the gold mark; The gold label is sleeved on the outer side of the anchoring piece, and the anchoring piece includes a gold label attachment area for sleeved with the gold label, and the anchoring piece is provided with an angle-adjustable elastic bending structure in the area outside the gold label attachment area; Alternatively, the anchor is fixed to the outer side of the gold label.

6. The marker implantation device according to claim 1, characterized in that: The marker includes a shape memory alloy column arranged inside and outside and a gold label in the shape of a coil spring; The shape memory alloy column includes an inner column located in the gold mark and an extension structure extending axially from both ends of the gold mark, wherein the extension structure is an elastic bending structure; When the marker is stored in the storage slot, the bending structure is in a folded state; When the marker is pushed out of the storage groove, the bending structure is elastically deformed into an unfolded state.

7. The marker implantation device according to claim 1, characterized in that: The marker comprises an inner and outer cylindrical body and two spirally arranged gold winding structures; The two gold winding structures have the same spiral direction and the same pitch, and the spiral turns of the two gold winding structures are adjacent to each other.

8. The marker implantation device according to claim 1, characterized in that: The marker includes a shape memory alloy column arranged inside and outside and a gold label in the shape of a coil spring; There are two shape memory alloy columns, which are a first alloy column and a second alloy column.

9. The marker implantation device according to claim 1, characterized in that: The marker comprises a shape memory alloy column, the shape memory alloy column comprising a first fixing portion and a second fixing portion for fixing a spirally arranged gold winding structure, the first fixing portion and the second fixing portion being connected via an elastic bending portion; When the marker is stored in the storage groove, the included angle between the first fixing portion and the second fixing portion is greater than the included angle between the first fixing portion and the second fixing portion when the marker is pushed out of the storage groove.

10. The marker implantation device according to claim 1, characterized in that: The marker comprises a gold mark in the shape of a spiral spring, and the outer wall of the gold mark is fixedly connected with a villi-shaped anchoring structure.

Images