Marker implantation device

Abstract

The invention 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. Through the arrangement of the filling mechanism, the filling process of the marker is simplified, and the marker can be conveniently pushed into a target position through the needle core after being rapidly filled. According to the invention, multiple implantation of the marker for one-time puncture is realized, and the puncture frequency of a patient is greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a marker implanting device. BACKGROUND

[0002] Traditional stereotactic radiotherapy technology, such as Gamma Knife, usually helps to position the radiotherapy field by means of body surface markers or external fixation supports, and this positioning method has certain errors, especially when the patient moves slightly, which may deviate from the radiotherapy field, thereby reducing the treatment effect and possibly causing unnecessary damage. A new type of stereotactic radiotherapy equipment, Cyber Knife, has appeared. Cyber Knife is a synchronous radiotherapy equipment that can realize real-time three-dimensional tracking of tumor position, and is the most advanced whole-body three-dimensional stereotactic radiosurgery treatment equipment in the world. Since the method for realizing real-time target tracking is through the CT (Computed Tomography) positioning system of the equipment, the tumor position is tracked once per second, and the position and angle of the radiotherapy head are adjusted accurately according to the tracked position information, so that stereotactic radiotherapy with an accuracy of 1mm can be realized. In order to better realize tumor position tracking, some tumors with special properties or positions (such as liver tumors and prostate tumors) usually need to be implanted with CT-sensitive markers, such as metal tracking markers (gold markers), to help the equipment realize accurate tumor position tracking.

[0003] The currently used human radiotherapy tracking marker implanting device has the following shortcomings:

[0004] For example, the patent with the publication number CN 104665897B discloses a Cyber Knife tracking marker implanting human puncture needle that can prevent pneumothorax. The device withdraws the needle after puncture and injects liquid biological glue to prevent external gas from entering to form pneumothorax. However, this invention has the disadvantage that it cannot realize fast loading of markers, and the loading is difficult.

[0005] For example, the patent with the publication number CN 203138573U discloses a stereotactic radiotherapy tracking marker implanting device. The patent discloses the need to repeatedly load markers, but in the patent, the markers need to be loaded into the marker loading hole. The markers with small sizes need to be placed into the marker loading hole, and the operation needs to be very delicate, thereby prolonging the operation time. Therefore, the patent cannot realize fast loading of markers, and the loading is difficult.

[0006] In summary, there is currently a lack of a marker placing device that can realize fast loading of markers. SUMMARY

[0007] In view of the problems in the prior art, the present application provides a marker implanting device, which solves at least one of the above technical problems.

[0008] The technical scheme of the present application is: a marker implanting device, characterized in that comprising a puncture needle outer tube, a needle core, a marker and a filling mechanism;

[0009] The puncture needle outer tube comprises an outer needle tube and an outer needle seat connected in sequence along an axial direction, the outer needle seat is provided with a guide positioning groove, both ends of the guide positioning groove in the axial direction are penetrated and communicated, and the axial opening of the guide positioning groove is in butt communication with both 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, the through hole comprises a storage groove for storing the marker and an import groove for pushing the marker into the storage cavity, the import groove is in butt communication with the storage groove, the storage groove is in butt communication with the inner cavity of the outer needle tube, and the through hole is in butt communication with the outer needle tube to form a channel for guiding the insertion of the needle core.

[0011] The present application simplifies the filling process of the marker by the setting of the filling mechanism, and facilitates the rapid filling of the marker, which is then pushed into the target position by the needle core. The present application realizes the multiple implantation of the marker in one puncture, greatly reducing the puncture times of the patient.

[0012] Further preferably, one end of the storage groove away from the import groove is connected with the marker through paraffin.

[0013] The paraffin is harmless to the human body and can be used to fix the marker, preventing the preloaded marker from falling off. The paraffin can prevent the marker from being stuck during the pushing process and has a lubricating effect. At the same time, the paraffin can also block the delivery channel, reducing the entry of gas 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 conical groove with an increasing inner diameter from front to back;

[0016] The filling mechanism comprises a conical insertion part matched with the conical groove, and the rear end of the conical insertion part is provided with an extension extending radially outward;

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

[0018] The extension facilitates the holding 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 comprises an inner needle body and an inner needle seat arranged front and back;

[0020] The front end of the inner needle seat abuts against the extension part, and the rear end of the outer needle seat abuts against the extension part, and 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 label and an anchor for anchoring the gold label.

[0022] The gold label is sleeved on the outside of the anchor, and the anchor comprises a gold label attachment area for sleeving the gold label, and the anchor is provided with an angle-adjustable elastic bending structure in an area outside the gold label attachment area.

[0023] Alternatively, the anchor structure is fixed on the outside of the gold label.

[0024] As a preferred solution, the marker comprises an inner and outer shape memory alloy column and a gold label in the shape of a spiral spring.

[0025] The shape memory alloy column comprises an inner column body located in the gold label and an extension structure extending out of both ends of the gold label in the axial direction, and the extension structure is an elastic bending structure.

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

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

[0028] When the marker is pushed out of the storage slot, the elastic deformation of the bending structure unfolds to fix the marker, preventing the marker from deviating due to the respiratory movement of the human body. In this solution, the shape memory alloy column is an anchor.

[0029] As another preferred solution, the marker comprises an inner and outer cylindrical body and two gold winding structures in the shape of a spiral.

[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 arranged adjacently.

[0031] To increase the overall friction of the gold label, so that it has better "anchoring" performance. In this solution, the cylindrical body is an anchor. The gold winding structure is a gold label.

[0032] As another preferred solution, the marker comprises an inner and outer shape memory alloy column and a gold label in the shape of a spiral spring.

[0033] The shape memory alloy column is provided with two, and the two shape memory alloy columns are respectively a first alloy column and a second alloy column.

[0034] The first alloy column and the second alloy column each comprise an inner column body located in the gold label and an extension structure extending out of both ends of the gold label in the axial direction, and the extension structure is an elastic bending structure.

[0035] When the marker is accommodated in the storage groove, the bending structure is a U-shaped structure, the bending structures of the first alloy column and the second alloy column are partially close to each other, and the bending directions are different.

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

[0037] When the marker is pushed out of the storage groove, the bending structure is elastically deformed and unfolded to fix the marker, so as to prevent the marker from deviating due to the breathing movement of the human body. In this scheme, the shape memory alloy column is an anchor.

[0038] As another preferred scheme, the marker comprises a gold label in the shape of a spiral spring, and the outer wall of the gold label is fixedly connected with an anchor structure in the shape of fluff.

[0039] The anchor structure in the shape of fluff on the surface increases the friction of the gold label, so as to achieve the "anchoring" effect.

[0040] In this scheme, the anchor structure is an anchor.

[0041] As another preferred scheme, the marker comprises a shape memory alloy column, the shape memory alloy column comprises a first fixing part and a second fixing part for fixing a gold winding structure arranged in a spiral, and the first fixing part and the second fixing part are connected through an elastic bending part;

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

[0043] In this scheme, the shape memory alloy column is an anchor.

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

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

[0046] The implantation method of the marker implantation device comprises the following steps,

[0047] 1) implanting a first marker;

[0048] A marker is pre-installed inside the front end of the outer tube of the puncture needle, and the marker is fixed to the tip of the outer tube of the puncture needle with paraffin.

[0049] The outer tube of the puncture needle is inserted, and then the needle core is inserted into the inlet slot of the loading mechanism. Before insertion, ensure that the outer needle seat of the outer tube of the puncture needle is equipped with a loading mechanism without a marker. Then push the needle core forward until the marker at the front end of the outer tube of the puncture needle is pushed out to reach the target area.

[0050] 2) Implantation of subsequent markers;

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

[0052] Specifically,

[0053] During the initial implantation of the marker, a marker is pre-installed inside the front end of the outer tube of the puncture needle. The marker at the front end of the outer tube is used as the first marker, which is fixed to the tip of the outer tube of the puncture needle with paraffin.

[0054] The outer needle hub of the puncture needle tube is pre-loaded with a loading mechanism without a marker. The puncture needle tube without a needle core is inserted into the target area near or inside the tumor. Then, the needle core is inserted into the inlet groove of the loading mechanism and pushed forward until the marker at the front end of the outer needle tube of the puncture needle tube is pushed out and reaches the designated area of ​​the tumor. This completes the implantation of the first marker.

[0055] Alternatively, it may include a limiter for radially engaging the inner needle body;

[0056] The outer needle hub of the puncture needle is pre-loaded with a loading mechanism without a marker. The needle core is passed through the outer needle of the puncture needle, and the limiter is clamped between the inner needle hub of the needle core and the loading device. The outer needle of the puncture needle and the needle core are inserted together into the target area near or inside the tumor. Then, the limiter is removed, and the needle core is advanced until the marker at the front end of the outer needle of the puncture needle is pushed out and reaches the designated area of ​​the tumor. This completes the implantation of the first marker.

[0057] When multiple markers need to be implanted, firstly, the original needle core needs to be removed from the loading mechanism, and the loading mechanism needs to be removed; then, the loading mechanism pre-loaded with the markers is inserted into the outer needle hub of the outer tube; next, the needle core is inserted into the guide slot of the loading mechanism, and the needle core is advanced until the marker slides into the outer needle tube of the puncture needle outer tube, and is advanced further until the tip 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 reach the designated area of ​​the tumor, thus completing the implantation of the second marker.

[0058] For subsequent marker implantation, the need for repeated punctures is avoided. The operator only needs to withdraw the needle stylet, remove the loading mechanism without the marker, and install the loading mechanism with the marker onto the outer needle hub of the puncture needle cannula. By repeating the marker delivery steps, precise implantation of subsequent markers can be achieved. This process can be repeated, enabling multiple implantations in a single puncture, improving treatment efficiency and accuracy while reducing additional harm to the patient and the risk of pneumothorax.

[0059] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0060] 1. In lung applications, due to the porous texture of the organ, traditional markers are prone to displacement within the lungs. The markers in this solution have a unique "anchoring" structure and excellent "anchoring" performance. After implantation, they are less likely to move with the body's movement and breathing, thus avoiding deviation from the radiotherapy target area and improving the accuracy and therapeutic effect of stereotactic radiotherapy for tumors in the body.

[0061] 2. Convenient marker loading and implantation. Equipped with a loading mechanism, the markers are pre-loaded within the mechanism. Simply changing the loading mechanism allows for quick and convenient loading and implantation of the next marker. The markers are pre-loaded in the loading mechanism before surgery, allowing for rapid replacement of the loading device for secondary implantation during the procedure.

[0062] 3. By using an axial insertion 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 invention can implant multiple markers with only one puncture, reducing the number of punctures, minimizing harm to the human body, and lowering the risk of pneumothorax. Attached Figure Description

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

[0064] Figure 2 This is a schematic diagram of a specific embodiment 1 of the present invention;

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

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

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

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

[0069] Figure 7This is a schematic diagram of a structure after the marker is ejected from the loading mechanism in a specific embodiment 2 of the present invention;

[0070] Figure 8 This is a schematic diagram of the structure of a marker in a specific embodiment 3 of the present invention;

[0071] Figure 9 This is a schematic diagram of a structure in a specific embodiment 4 of the present invention, showing the marker being stored in the filling mechanism;

[0072] Figure 10 This is a schematic diagram of a structure after the marker is ejected from the loading mechanism in specific embodiment 4 of the present invention;

[0073] Figure 11 This is a schematic diagram of a structure after the marker is ejected from the loading mechanism in specific embodiment 4 of the present invention;

[0074] Figure 12 This is a schematic diagram of the structure of a marker in specific embodiment 5 of the present invention;

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

[0076] Figure 14 This is a schematic diagram of a structure after the marker is ejected from the filling mechanism in specific embodiment 6 of the present invention;

[0077] Figure 15 This is a schematic diagram of a structure with a limiter according to a specific embodiment 1 of the present invention;

[0078] Figure 16 This is a specific embodiment 1 of the present invention. Figure 15 Exploded view of the structure. Detailed Implementation

[0079] See Figures 1 to 5In specific embodiment 1, a marker implantation device includes a puncture needle outer tube 2, a needle core 3, a marker 4, and a loading mechanism 1. The puncture needle outer tube 2 includes an outer needle tube 2.2 and an outer needle seat 2.1 connected in sequence. The outer needle seat 2.1 has a guide positioning groove 2.11 for axial insertion of the loading mechanism 1. The two ends of the guide positioning groove 2.11 are axially connected. The axial opening of the guide positioning groove 2.11 is connected to the inner cavity of the outer needle tube 2.2 and the loading mechanism. The inner cavity of the loading mechanism 1 has a through hole, which includes a storage groove 1.3 for storing the marker 4 and an inlet groove 1.2 for pushing the marker 4 into the storage cavity. The inlet groove 1.2 is connected to the storage groove 1.3, and the storage groove 1.3 is connected to the inner cavity of the outer needle tube 2.2. The through hole and the outer needle tube 2.2 are connected to form a channel for guiding the insertion of the needle core 3. This invention simplifies the loading process of the marker 4 by setting up the loading mechanism 1, allowing the marker 4 to be quickly loaded and then pushed into the target position by the needle core 3. This invention enables multiple implantations of the marker 4 with a single puncture, greatly reducing the number of punctures required for the patient.

[0080] The end of the storage tank 1.3 furthest from the inlet tank 1.2 is connected to the marker 4 via paraffin wax. This facilitates the fixation of the marker 4 within the loading mechanism 1. The use of harmless paraffin wax, fused with the marker 4, secures it and prevents the pre-loaded marker 4 from falling off. The paraffin wax also prevents jamming during marker delivery and provides lubrication. Simultaneously, it seals the delivery channel, reducing gas ingress and preventing pneumothorax.

[0081] The outer needle tube 2.2 and the outer needle seat 2.1 are arranged front and rear; the guide positioning groove 2.11 is a tapered groove with an increasing inner diameter from front to back; the filling mechanism 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 1, and also facilitates the positioning of the relative positions of the filling mechanism 1, the outer needle seat 2.1 and the needle core 3.

[0082] 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.

[0083] The implantation method of the marker implantation device includes the following steps:

[0084] 1) Implant 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 with paraffin wax;

[0086] The outer tube 2 of the puncture needle is inserted, and then the needle core 3 is inserted into the inlet groove of the loading mechanism 1. Before insertion, ensure that the outer needle seat 2.1 of the outer tube 2 of the puncture needle is equipped with a loading mechanism 1 without a marker. Then push the needle core 3 until the marker at the front end of the outer tube of the outer tube 2 of the puncture needle is pushed out to reach the target area.

[0087] 2) Implantation of subsequent markers;

[0088] Remove the needle core from the loading mechanism 1, replace the loading mechanism 1 with one pre-loaded with a marker, insert the needle core 3 into the inlet slot of the loading mechanism 1, and push the marker 4 out of the outer tube 2 of the puncture needle to 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, and the first marker is fixed to the head end of the puncture needle outer tube with paraffin.

[0091] The outer needle hub 2.1 of the outer tube 2 of the puncture needle is pre-loaded with a loading mechanism 1 without the marker 4. The outer tube 2 of the puncture needle is inserted into the target area near or inside the tumor. Then, the needle core 3 is inserted into the inlet groove 1.2 of the loading mechanism 1 and pushed forward until the marker 4 at the front end of the outer tube 2.2 of the outer tube 2 of the puncture needle is pushed out and reaches the designated area of ​​the tumor. This completes the implantation of the first marker 4.

[0092] Or see Figure 15 as well as Figure 16 It also includes a limiter for radially inserting the inner needle body 3.2 into the needle core; the outer needle seat of the puncture needle outer tube is pre-loaded with a loading mechanism without a marker, the needle core is passed through the inner needle seat 3.1 of the needle core and the loading device are clamped between the limiter; the outer needle tube and the needle core are inserted together into the target area near or inside the tumor, then the limiter is removed, 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, firstly, the original needle core 3 needs to be removed from the loading mechanism 1, and then the loading mechanism 1 is removed by holding it with one hand; then, the loading mechanism 1 pre-loaded with the markers 4 is loaded into the outer needle seat 2.1 of the outer tube; next, the needle core 3 is inserted into the guide 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 continues to push forward 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, thus completing the implantation of the second marker 4.

[0094] The subsequent implantation of marker 4 avoids the need for repeated punctures. The operator only needs to remove the needle core 3, remove the loading mechanism 1 without marker 4, and install the loading mechanism 1 with marker 4 onto the outer needle hub 2.1 of the puncture needle outer tube 2. By repeating the marker 4 pushing steps, the subsequent precise implantation of marker 4 can be achieved. This process can be repeated, enabling multiple implantations in a single puncture, improving the efficiency and accuracy of treatment, while reducing additional harm to the patient and the risk of pneumothorax.

[0095] See Figure 6 as well as Figure 7 In specific embodiment 2, based on specific embodiment 1, the marker includes shape memory alloy pillars 4.12 disposed internally and externally, and a spiral spring-shaped gold marker 4.11. The shape memory alloy pillar 4.12 includes an inner pillar located within the gold marker 4.11 and extension structures extending axially from both ends of the gold marker 4.11. The extension structures are elastically bent structures. When the marker is stored in the storage slot 1.3, the bending structure is a U-shaped structure; when the marker is pushed out of the storage slot 1.3, the bending structure elastically deforms into an L-shaped structure. When the marker is pushed out of the storage slot 1.3, the elastic deformation of the bending structure unfolds to fix the marker, preventing it from shifting due to human breathing movements. The shape memory alloy pillar is a nickel-titanium shape memory alloy pillar.

[0096] See Figure 8 In specific embodiment 3, based on specific embodiment 1, the marker includes an inner and outer cylindrical body 4.21 and two spirally arranged gold winding structures 4.22; the two gold winding structures 4.22 have the same spiral direction and the same pitch, and the spiral coils of the two gold winding structures 4.22 are arranged adjacent to each other. This is to increase the overall friction of the gold marker, so as to give it better "anchoring" performance. The cylinder is a gold cylinder.

[0097] See Figure 9 , Figure 10 as well as Figure 11In specific embodiment 4, based on specific embodiment 1, the marker 4 includes shape memory alloy pillars 4.12 arranged internally and externally, and a spiral spring-shaped gold marker 4.11. Two shape memory alloy pillars are provided, namely a first alloy pillar and a second alloy pillar. Both the first and second alloy pillars include an inner pillar located within the gold marker and extension structures extending axially from both ends of the gold marker. The extension structures are elastically bent structures. When the marker is stored in the storage slot 1.3, the bending structure is U-shaped, with the bending structures of the first and second alloy pillars partially in close contact and bending in different directions. When the marker is pushed out of the storage slot 1.3, the bending structure elastically deforms into an L-shaped structure, and the bending structures of the first and second alloy pillars become anchor hooks. When the marker is pushed out of the storage slot 1.3, the elastic deformation of the bending structure helps to fix the marker, preventing it from shifting due to human breathing. The shape memory alloy pillars are nickel-titanium shape memory alloy pillars.

[0098] See Figure 12 In specific embodiment 5, based on specific embodiment 1, the marker 4 includes a spiral spring-shaped gold marker, and the outer wall of the gold marker is fixedly connected with a fluffy anchoring structure.

[0099] The fluffy anchoring structure on the surface increases the friction of the gold standard, thus achieving an "anchoring" effect.

[0100] See Figure 13 as well as Figure 14 In specific embodiment 6, based on specific embodiment 1, the marker 4 includes a shape memory alloy column. The shape memory alloy column includes a first fixing part and a second fixing part for fixing the spirally wound gold structure. The first fixing part and the second fixing part are connected by an elastic bending part. When the marker is stored in the storage slot 1.3, the angle between the first fixing part and the second fixing part is greater than the angle between the first fixing part and the second fixing part when the marker is pushed out of the storage slot 1.3. After the marker is implanted into the human body, the shape memory alloy column will return to its original bent state, thus fixing the marker. The shape memory alloy column is a nickel-titanium shape memory alloy column. The first fixing part and the second fixing part are easily identifiable under radiation, and the angle between the first fixing part and the second fixing part increases the directional dimension information, allowing for better identification of the area requiring radiotherapy at the marked location.

[0101] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. Marker implant device, characterized in that The puncture needle outer tube, the needle core, the marker and the filling mechanism are included; The puncture needle outer tube includes an outer needle tube and an outer needle seat connected in sequence along the axial direction, the outer needle seat is provided with a guide positioning groove, both ends of the guide positioning groove are penetrated in the axial direction, and the axial opening of the guide positioning groove is connected with 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, the through hole includes a storage groove for storing the marker and an import groove for pushing the marker into the storage cavity, the import groove is connected with the storage groove, the storage groove is connected with the inner cavity of the outer needle tube, and the through hole is connected with the outer needle tube to form a channel for guiding the insertion of the needle core.

2. The marker implant device of claim 1, wherein: The end of the storage groove away from the import groove is connected with the marker through paraffin.

3. The marker implant device of claim 1, wherein: The outer needle tube and the outer needle seat are arranged in front and back. The guide positioning groove is a tapered groove with an increasing inner diameter from front to back. The filling mechanism includes a tapered insertion part matched with the tapered groove, and the rear end of the tapered insertion part is provided with an extension part extending radially outward. The front and back sides of the extension part are respectively abutted against the outer needle seat and the needle core.

4. The marker implant device of claim 3, wherein: 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 is abutted against the extension part and the rear end of the outer needle seat is abutted against the extension part, the front end of the inner needle body is flush with the needle tip of the outer needle tube.

5. The marker implant device of claim 1, wherein: The marker includes a gold marker and an anchor for anchoring the gold marker. The gold marker is sleeved on the outside of the anchor, and the anchor includes a gold marker attachment area for sleeving the gold marker, and an angle-adjustable elastic bending structure is arranged on the area outside the gold marker attachment area. Alternatively, the anchor is fixed on the outside of the gold marker.

6. The marker implant device of claim 1, wherein: The marker includes a shape memory alloy column and a gold marker in the shape of a spiral spring arranged inside and outside. The shape memory alloy column includes an inner column body located in the gold marker and an extension structure extending out of both ends of the gold marker in the axial direction, and the extension structure is an elastic bending structure. When the marker is stored in the storage groove, 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 implant device of claim 1, wherein: The marker includes a cylindrical body and two gold winding structures arranged in a spiral shape inside and outside. 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 arranged adjacent to each other.

8. The marker implant device of claim 1, wherein: The marker includes a shape memory alloy column and a gold marker in the shape of a spiral spring arranged inside and outside. The shape memory alloy column is provided with two, and the two shape memory alloy columns are respectively a first alloy column and a second alloy column.

9. The marker implant device of claim 1, wherein: The marker includes a shape memory alloy column, the shape memory alloy column includes a first fixing part and a second fixing part for fixing a gold winding structure arranged in a spiral shape, and the first fixing part and the second fixing part are connected through an elastic bending part. The angle between the first fixed part and the second fixed part when the marker is accommodated in the storage slot is greater than the angle between the first fixed part and the second fixed part when the marker is pushed out of the storage slot.

10. The marker implant device of any one of claims 1 to 9, wherein, The implantation method of the marker implantation device comprises the following steps, 1) implanting a first marker; A marker is pre-installed in the inner part of the front end of the outer needle tube of the puncture needle, and the marker is fixed in the head end of the puncture needle outer tube by paraffin; The puncture needle outer tube is pierced, and then the needle core is inserted from the guide slot of the filling mechanism, and before insertion, it is ensured that the outer needle seat of the puncture needle outer tube is installed with a filling mechanism without a marker, and then the needle core is pushed forward until the marker at the front end of the outer needle tube of the puncture needle is pushed out to reach the target area; 2) implanting subsequent markers; The needle core is withdrawn from the filling mechanism, the filling mechanism pre-installed with a marker is replaced, the needle core is inserted from the guide slot of the filling mechanism, and the marker is pushed out of the puncture needle to reach the target area.

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