Locating hook for lymph node developing tracer agent

Abstract

The utility model discloses a lymph node developing tracer agent locating hook, relates to minimally invasive surgery auxiliary instrument technical field, including holding cylinder, puncture needle, anchor needle claw, the puncture needle is fixed in the centre of holding cylinder tail end, the push tube is inserted in the puncture needle, the push tube tail end is fixed with the connector, anchor needle claw is fixed in the anchor needle claw, the anchor needle claw is fixed in the anchor needle claw, and the anchor needle claw is fixed in the anchor needle claw. A clamping-in head is fixedly arranged on the side face of the holding cylinder, and a safety structure for preventing the anchoring needle claw from being accidentally released is arranged at the position, at the clamping-in head, of the holding cylinder. The positioning hook is composed of the four groups of anchoring needle claws, the four groups of anchoring needle claws are in four-claw arc shapes and are made of nickel-titanium memory alloy materials, when the positioning claws are released, lung tissue is not prone to being torn, the safety structure is arranged, and the safety structure can prevent the positioning claws from being accidentally released when puncture of the puncture needle is not finished. Scales are arranged on the outer walls of the puncture needle and the positioning line, so that a doctor is assisted in determining the puncture depth and the release depth under the condition that an external CT instrument is not used.

Description

Technical Field

[0001] This utility model relates to the field of minimally invasive surgical auxiliary instruments, and in particular to a lymph node imaging tracer positioning hook. Background Technology

[0002] A lymph node imaging tracer locator hook is a medical device used to help doctors accurately locate lymph nodes. It mainly consists of two parts: a tracer hook and a locator. The tracer hook is a special hook-shaped object containing a tracer. The tracer is injected into the affected area, and then the hook is used to retrieve the lymph node, making it easier to identify in imaging examinations.

[0003] The existing tracer hook is a single steel wire structure. After positioning, the steel wire is fixed to the chest wall. Muscle contraction causes pain and dislocation, requiring immobilization of the patient. Immediate surgery is required after positioning. Furthermore, the hook opens laterally during release, which can easily tear lung tissue and cause bleeding. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the existing technology where the tracer hook is an integral steel wire structure, the steel wire is fixed to the chest wall after positioning, muscle contraction causes pain and dislocation, the patient needs to be immobilized, and immediate surgery is required after positioning. In addition, the hook opens laterally during release, which can easily tear lung tissue and cause bleeding. Therefore, this invention proposes a lymph node imaging tracer positioning hook.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A lymph node imaging tracer positioning hook includes a gripping cylinder, a puncture needle, and an anchoring claw. A hole is provided at the center of the side of the gripping cylinder. The puncture needle is fixedly disposed at the center of the end of the gripping cylinder. A push tube is movably inserted inside the puncture needle. A connector is fixedly disposed at the end of the push tube. A locking head is fixedly disposed on the side of the gripping cylinder. A safety structure is provided at the locking head position of the gripping cylinder to prevent the anchoring claw from being accidentally released. A positioning line is attached to the end of the push tube. Indicating graduations are equidistantly arranged on the outer wall of the positioning line and the outer wall of the puncture needle. A common cylinder is fixedly disposed at the end of the positioning line.

[0007] Optionally, the two sides of the grip cylinder are configured as arc-shaped surfaces, and corrugated protrusions are provided at equal intervals on the two sides of the grip cylinder.

[0008] Optionally, the common cylinder has a circular array of anchoring pins, the anchoring pins have an arc-shaped cross-section, and the anchoring pins are made of nickel-titanium shape memory alloy.

[0009] Optionally, the safety structure includes a docking cylinder and a safety box, wherein the head of the safety box is provided with a docking cylinder, and the outer diameter of the docking cylinder is equal to the inner diameter of the puncture needle.

[0010] Optionally, the safe box has a receiving cavity on its side, and a connector is movably inserted into the side of the receiving cavity.

[0011] Optionally, a limiting cavity is formed on the side of the docking cylinder, and the cross-sectional thickness of the limiting cavity is the same as the cross-sectional thickness of the insertion head.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. The positioning hook of this utility model consists of four sets of anchoring claws. The four sets of anchoring claws are four-claw arc-shaped and made of nickel-titanium shape memory alloy. When the positioning claws are released, they are less likely to tear lung tissue.

[0014] 2. This utility model is equipped with a safety structure, which can prevent the positioning claw from being accidentally released before the puncture needle has been fully inserted. In addition, the outer wall of both the puncture needle and the positioning line is equipped with scales, which can help doctors determine the puncture depth and release depth without the aid of external CT instruments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 for Figure 1 A schematic diagram of the explosion structure.

[0017] Figure 3 This is a schematic diagram of the specific structure of the anchoring pin.

[0018] In the diagram: 1. Positioning line; 2. Indicator scale; 3. Puncture needle; 4. Holding tube; 5. Arc-shaped surface; 6. Corrugated protrusion; 7. Push tube; 8. Connector; 9. Insertion head; 10. Limiting cavity; 11. Docking tube; 12. Safety box; 121. Receiving cavity; 13. Common tube; 14. Anchoring needle claw. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-3 A lymph node imaging tracer positioning hook includes a holding tube 4, a puncture needle 3, and an anchoring needle claw 14. A hole is provided at the center of the side of the holding tube 4, and a puncture needle 3 is fixedly provided at the center of the end of the holding tube 4. The puncture needle 3 is hollow and the head of the puncture needle 3 is set as a pointed tip.

[0021] The puncture needle 3 has a push tube 7 inserted inside. The end of the push tube 7 is fixedly provided with a connector 8. The side of the holding tube 4 is fixedly provided with a locking head 9. The locking head 9 and the center of the side of the holding tube 4 are provided with holes. The holding tube 4 is provided with a safety structure at the position of the locking head 9 to prevent the anchoring claw 14 from being accidentally released. The end of the push tube 7 is attached with a positioning line 1. The outer wall of the positioning line 1 and the outer wall of the puncture needle 3 are provided with indicator scales at equal intervals to facilitate the determination of puncture depth and positioning depth.

[0022] A common tube 13 is fixedly installed at the end of the positioning line 1. The two sides of the grip tube 4 are set as arc surfaces. Corrugated protrusions 6 are equidistantly arranged on the two sides of the grip tube 4 to facilitate the doctor to hold the entire grip tube 4.

[0023] The inner cavity of the common cylinder 13 has a circular array of anchoring claws 14. The anchoring claws 14 have an arc-shaped cross-section and are made of nickel-titanium shape memory alloy. The safety structure includes a docking cylinder 11 and a safety box 12. The safety box 12 has a docking cylinder 11 at its head. The outer diameter of the docking cylinder 11 is equal to the inner diameter of the puncture needle 3. A receiving cavity 121 is opened on the side of the safety box 12. A connector 8 is movably inserted into the side of the receiving cavity 121. A limiting cavity 10 is opened on the side of the docking cylinder 11. The cross-sectional thickness of the limiting cavity 10 is the same as the cross-sectional thickness of the locking head 9. When the connector 8 is locked into the receiving cavity 121, there is a gap between the connector 8 and the locking head 9.

[0024] In addition, the puncture needle 3 and the push tube 7 are made of medical stainless steel, and the positioning line 7 is made of absorbable medical suture material.

[0025] It should be added that,

[0026] The specific implementation steps and principles of this utility model are as follows:

[0027] In the initial state, the four anchoring claws 14 are in the inner cavity of the puncture needle 3, and the locking head 8 is locked into the limiting cavity 10. At this time, the connecting head 8 is in the receiving cavity 121. When the doctor uses it, he first holds the corrugated protrusions 6 of the two sets of arc surfaces 5 with his fingers, and then holds the entire holding tube 4. Then, according to the actual puncture depth, he inserts the puncture needle into the patient's body to an appropriate depth. He releases the integrated structure of the safety box 12 and the docking tube 11 from the locking head 9. At this time, the connecting head 8 connected with the push tube 7 can be pushed freely. The doctor uses the connecting head 8 and the push tube 7 to extend the four sets of anchoring claws 14 from the inside of the puncture needle 3 with his other hand. Since the four sets of anchoring claws are made of memory nickel-titanium alloy, they will return to the hook shape. Finally, the push tube 7 is pulled out from the inner cavity of the puncture needle 3, and the positioning line 1 is pulled out.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A lymph node visualizing tracer positioning hook comprising a holding cylinder (4), a puncture needle (3), an anchoring needle claw (14), characterized in that, The gripping cylinder (4) has a hole at the center of its side. A puncture needle (3) is fixedly installed at the center of the end of the gripping cylinder (4). A push tube (7) is inserted into the puncture needle (3). A connector (8) is fixedly installed at the end of the push tube (7). A locking head (9) is fixedly installed on the side of the gripping cylinder (4). A safety structure is provided at the locking head (9) of the gripping cylinder (4) to prevent the anchoring claw (14) from being accidentally released. A positioning line (1) is attached to the end of the push tube (7). Indicator scales are provided at equal intervals on the outer wall of the positioning line (1) and the outer wall of the puncture needle (3). A common cylinder (13) is fixedly installed at the end of the positioning line (1).

2. A lymph node visualizing tracer positioning hook according to claim 1, characterized in that The two sides of the grip tube (4) are arranged in an arc shape, and the two sides of the grip tube (4) are provided with corrugated protrusions (6) at equal intervals.

3. A hook for positioning a tracer for lymph node visualization according to claim 1, wherein, The common cylinder (13) has a circular array of anchoring pins (14) inside. The anchoring pins (14) have an arc-shaped cross-section and are made of nickel-titanium shape memory alloy.

4. The hook of claim 1, wherein, The safety structure includes a docking tube (11) and a safety box (12). The head of the safety box (12) is provided with the docking tube (11), and the outer diameter of the docking tube (11) is equal to the inner diameter of the puncture needle (3).

5. A lymph node visualizing tracer positioning hook according to claim 4, characterized in that The safe box (12) has a receiving cavity (121) on its side, and a connector (8) is movably inserted into the side of the receiving cavity (121).

6. A lymph node visualizing tracer positioning hook according to claim 4, characterized in that The side of the docking cylinder (11) has a limiting cavity (10), and the cross-sectional thickness of the limiting cavity (10) is the same as the cross-sectional thickness of the insert head (9).

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