Pulmonary nodule positioning anchor

Abstract

The utility model discloses a pulmonary nodule positioning anchor, and belongs to the technical field of biomedical instruments. The positioning anchor comprises a rod-shaped body and a spring body; the middle section of the rod-shaped body is of a concave structure, the two ends of the rod-shaped body are of convex structures, the middle section is sleeved with the spring body, the pulmonary nodule positioning anchor has high positioning precision, and medical negligence can be reduced in the using process.

Description

Technical Field

[0001] The utility model relates to a pulmonary nodule positioning anchor, in particular to a carbon-based material pulmonary nodule positioning anchor with good biocompatibility and high positioning accuracy, belonging to the technical field of biomedical instruments. Background Technique

[0002] The incidence and mortality of lung cancer are both increasing year by year. The five-year survival rate of lung cancer is only 15%, while the five-year survival rate of early-stage lung cancer with timely treatment can reach 60-80%. With the popularization of low-dose spiral CT lung cancer screening, more and more pulmonary nodules are detected. Pulmonary nodules are small focal, round-shaped, shadow with increased density on imaging, which can be single or multiple, without atelectasis, hilar enlargement and pleural effusion. Solitary pulmonary nodules have no typical symptoms and are often single, with clear boundaries, increased density, a diameter ≤ 3 cm and surrounded by air-containing lung tissue soft tissue shadows. The combination of video-assisted thoracoscopic surgery and precise CT-guided preoperative positioning of pulmonary nodules has become the main method for the diagnosis and treatment of pulmonary nodules. This method can increase the accuracy of pulmonary nodule resection surgery to achieve the minimum pulmonary wedge resection, reduce the trauma caused by the resection surgery, and improve the quality of life of patients. Currently, the indwelling positioning needle technique of puncturing under CT guidance before surgery and indwelling positioning needles around the nodules is the most widely used in vitro positioning technique for pulmonary micro-nodules and pulmonary ground-glass lesions in clinical practice. There are mainly nickel-titanium alloy micro-coils, four-hook positioning needles, coils with a unique dumbbell-shaped structure, and stainless steel hooked metal guide wires, etc. There are still certain deficiencies. After positioning, patients often have symptoms such as pain and pleural irritation; sometimes patients do not undergo surgery in time, and factors such as time and movement may also increase the risks of displacement, shedding, and even fracture. Secondly, common complications such as pneumothorax, bleeding, and pain are prone to occur after positioning. And when indwelling the positioning needle in the ventilation state, during the collapse process of the lung, the volume of the lung changes, and the positioning needle may further damage the lung. And the end of the metal wire is prone to fracture and remain in the body. Since the metal wire itself is very small and not easy to be found, once a fracture occurs and is not treated effectively in time, it may lead to a huge medical accident of residual metal in the lung after surgery. Content of the Utility Model

[0003] Aiming at the defects existing in the prior art, the purpose of the utility model is to provide a pulmonary nodule positioning anchor with high positioning accuracy.

[0004] To achieve the above-mentioned several purposes, the utility model provides a pulmonary nodule positioning anchor, which includes a rod-shaped body and a spring body 2; the middle section of the rod-shaped body is a concave structure 1, and both ends are convex structures 6, and the middle section is sleeved with the spring body.

[0005] During the use of the positioning anchor provided by the present utility model, it is placed as a whole into the syringe. At this time, the diameter of the spring body is compressed and reduced, and it stays in the syringe through the resilience resistance. After reaching the position of the lung nodule with the syringe, it is pushed out by the push rod, and the spring body returns to its original state. Since the surface between the wires of the spring body has a large contact with the tissue and the resistance to movement is increased, the anchoring accuracy is improved.

[0006] As a preferred solution, the middle section of the rod-shaped body is a cylinder with a diameter in the range of 1 - 2.5 mm and a length in the range of 5 - 30 mm.

[0007] As a preferred solution, the wire diameter of the spring body is 0.05 - 0.5 mm, and the outer diameter is 1.05 - 2.55 mm. The inner diameter of the spring body is about 0.05 mm smaller than the diameter of the middle section of the rod-shaped body to ensure that the spring body is limited at the concave part of the middle section of the rod-shaped body and does not break away.

[0008] As a preferred solution, a conical head 3 is provided on the outside of the convex structure at one end of the rod-shaped body, and a tail 4 with a laterally penetrating small hole 5 is provided on the outside of the convex structure at the other end. The design of the conical head can reduce the resistance when the positioning anchor is inserted into the syringe and into the lung nodule; and by providing a penetrating small hole at the tail, it is convenient to fix the guiding wire and can provide a guiding function during the operation. As a more preferred solution, the aperture of the laterally penetrating small hole is 0.2 - 0.6 mm.

[0009] As a preferred solution, the rod-shaped body is based on a carbon-based composite material, and a functional coating 7 is provided on its surface. The functional coating is, for example, a pyrolytic carbon coating, a silicon carbide coating or a diamond-like coating. The carbon-based composite material is a material well-known in the prior art, which is based on carbon or silicon carbide, and uses carbon fiber or silicon carbide fiber distributed in the matrix as the reinforcing phase. The coating on the surface of the rod-shaped body is a functional coating, and these coatings are all coatings well-known in the prior art. On the one hand, it can increase biocompatibility and surface wear resistance, etc. On the other hand, it can prevent carbon or silicon carbide particles from falling off and remaining in the body.

[0010] As a preferred solution, the spring body is based on a carbon fiber fabric, and a functional coating 7 is provided on its surface. The functional coating is, for example, a pyrolytic carbon coating, a silicon carbide coating or a diamond-like coating. The carbon fiber fabric is, for example, a carbon fiber rope woven from carbon fibers, which is also a material well-known in the art. The coating on the surface of the spring body is a functional coating, and these coatings are all coatings well-known in the prior art. On the one hand, it can increase biocompatibility and surface wear resistance, etc. On the other hand, it can prevent carbon or silicon carbide particles from falling off and remaining in the body.

[0011] The lung nodule positioning anchor provided by the present utility model is simply processed and formed from existing materials:

[0012] Spring body: Weave a plurality of carbon fibers into a carbon fiber rope or braid, and then use a rod-shaped mold to assist in forming a spiral spring-shaped carbon fiber blank from the carbon fiber rope or braid, and then prepare a pyrolytic carbon coating, a silicon carbide coating or a diamond-like coating on its surface;

[0013] Rod-shaped body: A rod-shaped structure designed by machining a carbon-based composite material, and then a pyrolytic carbon coating, a silicon carbide coating or a diamond-like coating is prepared on its surface.

[0014] Among them, the pyrolytic carbon coating or the silicon carbide coating is obtained by existing chemical vapor deposition, and the diamond-like coating is generated by existing magnetron sputtering or plasma-enhanced chemical vapor deposition.

[0015] Compared with the prior art, the beneficial technical effects brought by the present utility model are:

[0016] 1) Through the combined design of the rod-shaped body and the spring body, the nodule positioning accuracy can be improved;

[0017] 2) The entire lung nodule positioning anchor can be processed and formed by carbon materials, and it has good stability and light weight.

[0018] 3) Its surface has functional coatings such as pyrolytic carbon coating, silicon carbide coating or diamond-like coating, which can improve the surface biocompatibility and surface wear resistance and other properties. Description of the drawings

[0019] Figure 1 It is a schematic structural diagram of the lung nodule positioning anchor in Embodiment 1.

[0020] Figure 2 It is a partial cross-sectional schematic diagram of the lung nodule positioning anchor in Embodiment 1.

[0021] Figure 3 It is a schematic structural diagram of the lung nodule positioning anchor in Embodiment 2.

[0022] Figure 4 It is a partial 2 cross-sectional schematic diagram of the lung nodule positioning anchor in Embodiment 2.

[0023] Among them, 1 is a concave structure, 2 is a spring body, 3 is a conical head, 4 is a tail, 5 is a small hole, 6 is a convex structure, and 7 is a functional coating. Detailed implementation manners

[0024] The following further elaborates on the content of the present utility model in conjunction with the accompanying drawings of the specification, rather than limiting the scope included in the claims.

[0025] Embodiment 1

[0026] The lung nodule positioning anchor provided in this embodiment is as Figure 1 and 2As shown, it is composed of a rod-shaped body and a spring body 2. The two ends of the rod-shaped body are convex structures 6, while the middle section is a concave structure. The outer shape of the middle section is a cylinder with a diameter of 2 mm and a length of 10 mm. The spring body is sleeved around the concave structure of the middle section of the rod-shaped body. The wire diameter of the spring body is 0.1 mm and the outer diameter is 2.05 mm. The rod-shaped body is composed of a carbon-based composite material matrix and a pyrolytic carbon coating on its surface 7. The spring body uses a carbon fiber rope as the matrix, and a diamond-like carbon coating 7 is provided on its surface.

[0027] Embodiment 2

[0028] The lung nodule positioning anchor provided in this embodiment is as Figure 3 and Figure 4 shown. It is composed of a rod-shaped body and a spring body 2. The two ends of the rod-shaped body are convex structures 6, while the middle section is a concave structure. The outer shape of the middle section is a cylinder with a diameter of 1.5 mm and a length of 15 mm. The spring body is sleeved around the concave structure of the middle section of the rod. The wire diameter of the spring body is 0.2 mm and the outer diameter is 1.55 mm. A conical head 3 is provided on the outside of the upper convex structure of the rod-shaped body, and a tail 4 with a laterally penetrating small hole 5 is provided on the outside of the lower convex structure. The aperture of the penetrating small hole is 0.4 mm. The rod-shaped body is composed of a carbon-based composite material matrix and a pyrolytic carbon coating 7. The spring structure uses a carbon fiber rope as the matrix, and a diamond-like carbon coating 7 is provided on its surface.

Claims

1. A lung nodule positioning anchor, characterized in that: The positioning anchor includes a rod-shaped body and a spring body (2); the middle section of the rod-shaped body is a concave structure (1), and both ends are convex structures (6), and the spring body is sleeved on the middle section.

2. The lung nodule positioning anchor according to claim 1, wherein: The middle section of the rod-shaped body is a cylinder with a diameter in the range of 1 to 2.5 mm and a length in the range of 5 to 30 mm.

3. The lung nodule positioning anchor according to claim 1, characterized in that: The wire diameter of the spring body is 0.05 to 0.5 mm, and the outer diameter is 1.05 to 2.55 mm.

4. A lung nodule localization anchor according to any one of claims 1 to 3, characterized in that: A conical head (3) is arranged on the outside of the convex structure at one end of the rod-shaped body, and a tail (4) with a laterally penetrating small hole (5) is arranged on the outside of the convex structure at the other end.

5. The lung nodule positioning anchor according to claim 4, characterized in that: The aperture of the laterally penetrating small hole is 0.2 to 0.6 mm.

6. A lung nodule localization anchor according to any one of claims 1 to 3, characterized in that: The rod-shaped body is based on a carbon-based composite material, and a functional coating (7) is provided on its surface.

7. A lung nodule positioning anchor according to any one of claims 1 to 3, characterized in that: The spring body is based on a carbon fiber fabric, and a functional coating (7) is provided on its surface.

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