Pulmonary nodule puncture positioning system and positioning method

Abstract

The invention discloses a pulmonary nodule puncture positioning system and method to solve the problems that an existing product is prone to causing human tissue bleeding and unstable positioning. On the first aspect, the pulmonary nodule puncture positioning system at least comprises a pulmonary nodule positioning assembly, a puncture needle assembly and a pushing assembly. The pulmonary nodule positioning assembly comprises a three-section type double-funnel-shaped positioning part, the double-funnel-shaped design enables the positioning part to be combined with a pulmonary nodule focus more compactly and to be positioned at the pulmonary nodule focus more stably, the technical problem that hook-shaped design is prone to unhooking can be solved, pulmonary hemorrhage is reduced, and the comfort level of a patient is improved. The invention discloses a pulmonary nodule puncture positioning method on the second aspect, and the pulmonary nodule puncture positioning method improves the puncture accuracy and reduces complications in the operation process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, more particularly, to a lung nodule puncture positioning system and a positioning method. BACKGROUND

[0002] A lung nodule is a round or oval lesion in the lung, usually less than 3 centimeters in diameter. Timely detection and diagnosis of lung nodules are crucial for improving the treatment of lung cancer. Accurate lung nodule positioning is an essential first step before lung nodule resection surgery or biopsy. Preoperative positioning usually relies on imaging techniques such as chest CT to determine the specific location of the lung nodule and the range of surgical resection.

[0003] The lung nodule positioning needles currently on the market are mostly designed in the form of fishhook or tower-shaped spring coil. Fishhook-type lung nodule positioning needles, such as double-hook or four-hook positioning needles, provide positioning function to some extent, but their design has obvious defects. When the positioning needle is ejected from the needle tube, its strong outward elastic force can easily cause rupture and bleeding of surrounding blood vessels, especially when a relatively thick positioning line is placed on the pleura and lung surface, its traction and friction with breathing can cause pain to the patient. In addition, this hook-type structure may grab or pierce into the lung nodule, which may lead to iatrogenic tumor cell implantation and dissemination. Compared with the fishhook design, the tower-shaped spring coil type lung nodule positioning needle performs better in some aspects, but its design also has the problem of easy unhooking. In such a design, the spring coil remains inside the lung nodule, while the connecting line remains outside the body, making the overall structure more likely to be pulled out during operation, thereby reducing the stability and safety of the surgery.

[0004] In view of the above problems, it is urgent to improve the existing lung nodule puncture positioning needle and lung nodule positioning system. The purpose of the present application is to provide a more accurate and safe lung nodule positioning method and system, which can effectively reduce complications during surgery, improve the accuracy of surgery and the comfort of patients, and at the same time avoid the risk of potential tumor cell dissemination. SUMMARY

[0005] The purpose of the present application is to disclose a lung nodule puncture positioning system and a positioning method to improve the problem that the existing puncture needle easily causes bleeding of human tissues and easy unhooking.

[0006] To achieve the above-mentioned purpose, the first aspect of the present application discloses a lung nodule puncture positioning system, at least comprising: The lung nodule positioning assembly comprises a positioning part and a delivery part connected with the positioning part and in an expanded state, the positioning part and the delivery part are connected through a connecting piece; the positioning part has a first spiral segment, a third spiral segment and a second spiral segment arranged between the first spiral segment and the third spiral segment, and the maximum outer diameter of the second spiral segment is smaller than the maximum outer diameter of the first spiral segment and the third spiral segment; the maximum outer diameter of the third spiral segment is greater than or equal to the maximum outer diameter of the first spiral segment; the positioning part is made of a shape memory alloy material, and the positioning part is at least partially left in the lung nodule tissue; The puncture needle assembly comprises a puncture needle body and a puncture needle handle arranged at the proximal end of the puncture needle body; the puncture needle body is arranged in the cavity of the lung nodule positioning assembly, and the positioning part is arranged in the direction close to the needle tip of the puncture needle body; the puncture needle handle is internally provided with a channel penetrating through the cavity; And a pushing assembly, the pushing assembly comprises a pushing core and a pushing handle connected with the pushing core; the pushing handle pushes the pushing core to pass through the puncture needle cavity, so as to push the positioning part out of the puncture needle cavity and push it into the lung nodule.

[0007] As a further improvement of the present application, the connecting piece is a pressing sleeve piece, which fixedly or detachably connects the positioning part and the delivery part.

[0008] As a further improvement of the present application, the length of the positioning part is not more than 15 mm.

[0009] As a further improvement of the present application, the puncture needle handle is further provided with a plug for plugging the channel.

[0010] As a further improvement of the present application, the puncture needle body is further provided with a first protective sleeve pipe for protecting the puncture needle body.

[0011] As a further improvement of the present application, the pushing core is further provided with a second protective sleeve pipe for protecting the pushing core.

[0012] As a further improvement of the present application, the outer side of the puncture needle body is provided with a plurality of scale marks for judging the puncture distance.

[0013] The second aspect of the present application discloses a lung nodule puncture positioning method, at least comprising the following steps: Preparation step: the data obtained by imaging is used to plan a puncture path and determine the best puncture site; Puncture positioning: under the guidance of imaging, the needle tip part of the puncture needle assembly is aligned along the puncture path and punctured to the predetermined position; then, the positioning part is pushed out and released in the lung nodule by using the pushing assembly. withdraw the push assembly; withdraw the puncture needle assembly: withdraw the puncture needle assembly outwardly to 0.5-3 cm; secondary push step: insert the push assembly into the puncture needle cavity again and push to the bottom; withdraw the puncture needle assembly and the push assembly completely.

[0014] As a further improvement of the present application, the imaging method used is any one of CT, PET, MRI and MRS.

[0015] As a further improvement of the present application, the positioning part has a first spiral section, a third spiral section and a second spiral section arranged between the first spiral section and the third spiral section, and the maximum outer diameter of the second spiral section is smaller than the maximum outer diameter of the first spiral section and the third spiral section; the maximum outer diameter of the third spiral section is greater than or equal to the maximum outer diameter of the first spiral section.

[0016] Compared with the prior art, the lung nodule puncture positioning system of the present application has the following beneficial effects: first, the lung nodule puncture positioning system of the present application is suitable for accurate positioning of lung nodules, and can more effectively reduce the damage to lung tissue, reduce the risk of pulmonary hemorrhage and pneumothorax, and thus improve the comfort of patients, compared with double-hook and four-hook positioning needles. Second, the stability of positioning is enhanced, and the risk of displacement of the lung nodule positioning assembly is reduced, the deviation of positioning caused by breathing or body movement is reduced, and the situation that the delivery end is separated from the visceral pleura surface due to large movement amplitude or severe breathing during deep lung nodule positioning is avoided. Third, the three-section positioning design can be curled irregularly in the lung tissue to provide good anchoring force. Finally, the lung nodule puncture positioning method of the present application improves the accuracy of puncture, reduces the problem of multiple punctures caused by unstable positioning, and the special design (three-section spiral structure) of the positioning part presents a double-hopper type. The double-hopper design can make the positioning part combine with the lung nodule lesion more tightly and stably, and can be positioned at the lung nodule lesion, which can solve the technical problem that the hook-shaped design is easy to unhook, reduce pulmonary hemorrhage, improve the comfort of patients, increase the stability of positioning, effectively fix in the nodule, and improve the treatment effect. At the same time, the operation time and the discomfort of patients are reduced, and the operation risk is reduced.

[0017] Through the above technical effects, the lung nodule positioning needle can provide more stable and safe positioning effect, reduce the discomfort and complications of patients during the operation process, and improve the efficiency of the operation and the satisfaction of patients. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1A schematic view of a lung nodule positioning assembly provided by the present application; Figure 2 A schematic view of a structure of a lung nodule puncture positioning system provided by the present application; Figure 3 For Figure 2 A schematic view of an enlarged structure at the block; Figure 4 A schematic view of a pushing assembly provided by the present application; Figure 5 A schematic view of a lung nodule puncture positioning method of the present application.

[0019] Reference numerals: 1-positioning part; 11-third spiral section; 12-second spiral section; 13-first spiral section; 2-conveying part; 3-connector; 4-puncture needle body; 5-first sheath tube; 6-puncture needle handle; 7-plug; 8-pushing core; 9-pushing handle; 10-second sheath tube; DETAILED DESCRIPTION

[0020] The present application will be described in detail below in conjunction with the embodiments shown in the drawings, but it should be noted that these embodiments are not a limitation on the present application, and equivalent transformations or substitutions of functions, methods, or structures made by those of ordinary skill in the art based on these embodiments are within the scope of the present application.

[0021] For the sake of description, the end close to the operator of the operation (far from the needle tip) will be referred to as the proximal end or proximal end of the puncture needle, and the end close to the needle tip will be referred to as the distal end or distal end of the puncture needle.

[0022] In combination with Figure 1 As shown in the drawings, the present application provides a lung nodule positioning assembly suitable for accurate positioning of lung nodules, which comprises a positioning part 1 and a conveying part 2 connected with the positioning part 1 and in an expanded state, and the positioning part 1 and the conveying part 2 are connected through a connector 3.

[0023] The lung nodule positioning assembly of the present application can be applied to the diagnosis of early lung cancer. For patients with early lung cancer, the lung nodule positioning assembly can help doctors accurately identify and locate lung nodules, thereby making biopsy more accurate. It can also be applied to guide the surgical resection of lung nodules. In the surgical resection of lung nodules, the lung nodule positioning assembly can help surgeons accurately locate the position of the nodule, ensure the accuracy of the operation, and maximize the preservation of surrounding healthy lung tissue. In addition, it can also be used as an auxiliary means for interventional therapy. When performing radiofrequency ablation or other interventional therapy, the lung nodule positioning assembly can ensure that the treatment is accurately applied to the target nodule, thereby improving the treatment effect and reducing damage to the surrounding normal tissue. Reducing the risk of surgery, using the lung nodule positioning assembly for preoperative planning, doctors can better understand the exact location and size of the lung nodule, which helps them develop a more detailed surgical plan, thereby improving the success rate of surgery.

[0024] The first aspect of the present application discloses a lung nodule puncture positioning system, comprising at least: The lung nodule positioning assembly comprises a positioning part and a delivery part connected with the positioning part and in an expanded state, the positioning part and the delivery part are connected by a connecting piece; the positioning part has a first spiral segment, a third spiral segment and a second spiral segment arranged between the first spiral segment and the third spiral segment, and the maximum outer diameter of the second spiral segment is smaller than the maximum outer diameter of the first spiral segment and the third spiral segment; the maximum outer diameter of the third spiral segment is greater than or equal to the maximum outer diameter of the first spiral segment; the positioning part is made of a shape memory alloy material, and the positioning part is at least partially retained in the lung nodule tissue; The puncture needle assembly comprises a puncture needle body and a puncture needle handle arranged at the proximal end of the puncture needle body; the lung nodule positioning assembly is arranged in the cavity of the puncture needle body, and the positioning part is arranged near the direction of the needle tip of the puncture needle body; the puncture needle handle is internally provided with a channel passing through the cavity; And a push assembly, the push assembly comprises a push core and a push handle connected with the push core; the push handle pushes the push core to pass through the puncture needle cavity, so as to push the positioning part out of the puncture needle cavity and push it into the lung nodule. Pulmonary nodule localization assembly Referring to Figure 1As shown, the positioning part 1 has a first spiral segment 13, a third spiral segment 11, and a second spiral segment 12 arranged between the first spiral segment 13 and the third spiral segment 11, and the maximum outer diameter of the second spiral segment 12 is smaller than the maximum outer diameter of the first spiral segment 13 and the third spiral segment 11, that is, the maximum outer diameter of the first spiral segment 13 is greater than the maximum outer diameter of the second spiral segment 12; the maximum outer diameter of the third spiral segment 11 is greater than the maximum outer diameter of the second spiral segment 12. In a preferred embodiment, the maximum outer diameter of the third spiral segment 11 is greater than the maximum outer diameter of the first spiral segment 13. That is, the maximum outer diameter of the third spiral segment 11 is greater than the maximum outer diameter of the first spiral segment 13, which is greater than the maximum outer diameter of the second spiral segment 12. In a preferred embodiment, the maximum outer diameter of the third spiral segment 11 is equal to the maximum outer diameter of the first spiral segment 13. The third spiral segment 11 includes a curved segment and a straight segment, the curved segment has the maximum outer diameter, and the straight segment is connected to the conveying part 2 through the connecting piece 3. The positioning part adopts this three-segment design, which has a double-funnel type, and the double-funnel type design can make the positioning part 1 combine with the pulmonary nodule lesion more tightly and be positioned more stably at the pulmonary nodule lesion, which can solve the technical problem that the hook-shaped design is easy to unhook, reduce pulmonary bleeding, and improve the comfort of the patient.

[0025] The outer diameter of the third spiral segment 11 can be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, etc.

[0026] The outer diameter of the second spiral segment 12 can be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, etc.

[0027] The outer diameter of the first spiral segment 13 can be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, etc.

[0028] The maximum outer diameter of the third spiral segment 11 is 5 mm, the maximum outer diameter of the second spiral segment 12 is 3 mm, and the maximum outer diameter of the first spiral segment 13 is 5 mm.

[0029] The maximum outer diameter of the third spiral section 11 is 5 mm, the maximum outer diameter of the second spiral section 12 is 3 mm, and the maximum outer diameter of the first spiral section 13 is 4 mm.

[0030] Illustratively, the positioning part 1 is made of a shape memory alloy material, and the positioning part 1 is at least partially left in the pulmonary nodule tissue. The shape memory alloy material is a memory alloy material that has been sold on the market, which can be listed as: nickel-titanium alloy, copper-zinc alloy, copper-aluminum-nickel alloy, copper-aluminum-manganese alloy, titanium-molybdenum alloy, nickel-titanium-copper alloy, nickel-titanium-iron alloy, copper-manganese alloy, copper-iron alloy, titanium-nickel-vanadium alloy, copper-gold-zirconium alloy, copper-nickel-aluminum alloy, silver-cadmium alloy, titanium-palladium alloy, titanium-nickel-niobium alloy, zirconium-nickel alloy, titanium-nickel-silver alloy, etc. The application preferably uses nickel-titanium alloy. The positioning part 1 can be wound by a memory alloy material single wire, or can be wound by a spring.

[0031] In the present application, the length of the positioning part 1 is not limited too much, and the design size is preferably not more than 15 mm according to the size of the pulmonary nodule lesion site.

[0032] The delivery part 2 is in an expanded state, and is connected to the positioning part 1 through the connecting piece 3. The material of the delivery part 2 can be selected as medical nylon material, nickel-titanium alloy, etc. In the present application, medical nylon material is more preferred. In a preferred embodiment, the connecting piece 3 is a pressing sleeve, which is used to fixedly connect the positioning part 1 and the delivery part 2. In another preferred embodiment, the connecting piece 3 is a pressing sleeve, which is used to detachably connect or fixedly connect the third spiral section 11 of the positioning part 1 and the delivery part 2. The material of the pressing sleeve can be stainless steel material or medical polymer material. The pressing sleeve can firmly fix the delivery part 2, preventing the positioning part 1 and the delivery part 2 from being separated.

[0033] The pulmonary nodule positioning assembly in the present application adopts this three-section design, which presents a double-funnel type. The double-funnel type design can make the positioning part 1 and the pulmonary nodule lesion combine more tightly and be more stably positioned at the pulmonary nodule lesion site, which can solve the technical problem that the hook-shaped design is easy to unhook, reduce pulmonary bleeding, and improve the comfort of patients. Puncture needle assembly : Referring to Figure 2 and Figure 3 As shown in the figure, the puncture needle assembly includes a puncture needle body 4 and a puncture needle handle 6 arranged at the proximal end of the puncture needle body 4; the puncture needle body 4 is fixedly connected with the puncture needle handle 6, and the puncture operation of the puncture needle body 4 is controlled through the puncture needle handle 6.

[0034] The lung nodule positioning assembly is arranged in the cavity of the puncture needle body 4, and comprises a positioning part 1 and a conveying part 2 connected with the positioning part 1 and in an expanded state.

[0035] The positioning part 1 is arranged in the direction of the needle tip of the puncture needle body 4, i.e. the distal end direction of the puncture needle body 4, and the conveying part 2 is arranged in the proximal end direction of the puncture needle body 4. A channel is arranged in the puncture needle handle 6 and penetrates the internal cavity of the puncture needle body. The channel is used for conveying the lung nodule positioning assembly, the lung nodule positioning assembly is prepared as a finished product in advance and is stored in the internal cavity of the puncture needle body 4 for ready use.

[0036] Referring to Figure 2 In a preferred embodiment, a plug 7 is further arranged on the puncture needle handle 6, and the plug 7 is used for plugging the channel. The plug 7 can be plugged with the channel in the following ways: threaded connection, clamp connection, quick connector, taper joint, etc.

[0037] Referring to Figure 2 In a preferred embodiment, a first sheath pipe 5 is further arranged outside the puncture needle body 4 and is used for protecting the puncture needle body 4, so as to prevent the puncture needle body 4 from being bent due to external force or being contaminated by other objects.

[0038] Push assembly Referring to Figure 4 The pushing assembly comprises a pushing core 8 and a pushing handle 9 connected with the pushing core 8. The pushing handle 9 is controlled to push the pushing core 8 through the internal cavity of the puncture needle body 4, so as to push the positioning part 1 out of the cavity of the puncture needle body 4 and into the lung nodule. The material of the pushing core 8 is not limited, and is preferably a hard material such as stainless steel. In addition, the maximum outer diameter of the pushing core 8 should be smaller than the internal cavity diameter of the puncture needle body 4, so as to facilitate the movement of the pushing core 8 in the internal cavity of the puncture needle body 4.

[0039] Referring to Figure 4 In a preferred embodiment, a second sheath pipe 10 is further arranged outside the pushing core 8 and is used for protecting the pushing core 8, so as to prevent the pushing core 8 from being bent due to external force or being contaminated by other objects.

[0040] The material of the first sheath tube 5 or the second sheath tube 10 is not particularly limited, and is preferably a medical polymer material, such as medical polyethylene.

[0041] As shown in Figure 5 The second aspect of the present application discloses a lung nodule puncture positioning method, comprising at least the following steps: Preparation step: planning the puncture path and determining the best puncture site through the imaging data; In a preferred embodiment, the imaging method is any one of CT (Computed Tomography), PET (Positron Emission Tomography), MRI (Magnetic Resonance Imaging), and MRS (Magnetic Resonance Spectroscopy).

[0042] Specifically, after CT or PET scanning, image data of the lung is obtained, the puncture path is planned using the image data, and the best puncture site is marked on the image.

[0043] Puncture positioning: under the guidance of imaging, the needle tip of the puncture needle assembly is aligned and punctured along the puncture path to the predetermined position; then, the positioning part is pushed out and released in the lung nodule using the push assembly; Specifically, under the guidance of imaging, the puncture needle assembly is operated to puncture the needle tip along the predetermined path to the marked puncture site, and real-time imaging feedback is used to ensure that the needle tip of the puncture needle is accurately aligned with the lung nodule. After reaching the target position, the positioning part (designed with a first spiral section, a second spiral section, and a third spiral section) is pushed out and released in the lung nodule using the push assembly. The second spiral section is designed to be smaller than the maximum outer diameter of the first and third spiral sections, which helps the positioning part to smoothly expand inside the nodule without damaging the surrounding tissue. The maximum outer diameter of the third spiral section is greater than or equal to that of the first spiral section, which ensures that the positioning part can be firmly fixed inside the lung nodule, thereby effectively preventing displacement during puncture.

[0044] Withdraw the push assembly: after the lung nodule positioning assembly is released and fixed, withdraw the push assembly; Withdraw the puncture needle assembly: withdraw the puncture needle assembly outward to 0.5 to 3 cm; Specifically, after the positioning part is fixed, the push assembly is withdrawn. Subsequently, the puncture needle assembly is withdrawn to 0.5 to 3 cm, ensuring that the needle tip is still within the safe range but no longer in the lung nodule, reducing additional damage to the lung tissue.

[0045] Second push step: insert the push assembly into the puncture needle cavity again and push to the bottom; Specifically, to ensure complete fixation of the positioning part, the push assembly is inserted into the puncture needle cavity again and pushed to the bottom to further fix the position of the positioning part.

[0046] Full withdrawal: the puncture needle assembly and the push assembly are fully withdrawn.

[0047] Specifically, after confirming the firmness of the positioning part, the puncture needle assembly and the push assembly are completely withdrawn together, completing the entire puncture positioning process.

[0048] As a further improvement of the present application, the positioning part has a first spiral segment, a third spiral segment, and a second spiral segment arranged between the first spiral segment and the third spiral segment, and the maximum outer diameter of the second spiral segment is smaller than that of the first spiral segment and the third spiral segment; the maximum outer diameter of the third spiral segment is greater than or equal to that of the first spiral segment.

[0049] Through the above steps, the use of the lung nodule positioning assembly not only ensures the accuracy of positioning, but also improves the safety and effectiveness of the operation, thereby providing more accurate diagnosis and treatment options for patients.

[0050] The specific technical effects are embodied as: 1. Reduced surgical risk: The special structure of the positioning part, especially the configuration of the spiral segment, effectively prevents the positioning from being unstable during the operation and damages to the tissue, thereby reducing the risk of surgery and the discomfort of the patient.

[0051] 2. Improved surgical accuracy: The fine planning of the puncture path ensures that the puncture needle can accurately reach the target position, reducing the risk of repeated puncture caused by deviation.

[0052] 3. Enhanced operational convenience: The design of the push assembly and the puncture needle makes the operation more smooth, reduces the complex steps in the operation, and improves the efficiency of the operation.

[0053] The above series of detailed descriptions are only specific descriptions of the feasible embodiments of the present application, and are not intended to limit the protection scope of the present application. Any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

[0054] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and the skilled person should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by the skilled person.

Claims

1. A lung nodule puncture positioning system, characterized in that, At least comprising: a lung nodule positioning assembly, which comprises a positioning part and a delivery part connected with the positioning part and in an extended state, the positioning part and the delivery part are connected through a connector; the positioning part has a first spiral segment, a third spiral segment and a second spiral segment arranged between the first spiral segment and the third spiral segment, and the maximum outer diameter of the second spiral segment is smaller than that of the first spiral segment and the third spiral segment; the maximum outer diameter of the third spiral segment is greater than or equal to that of the first spiral segment; the positioning part is made of a shape memory alloy material, and the positioning part is at least partially left in the lung nodule tissue; a puncture needle assembly, which comprises a puncture needle body and a puncture needle handle arranged at the proximal end of the puncture needle body; the lung nodule positioning assembly is arranged in the cavity of the puncture needle body, and the positioning part is arranged close to the direction of the needle tip of the puncture needle body; the puncture needle handle is internally provided with a channel penetrating through the cavity; and a pushing assembly, which comprises a pushing core and a pushing handle connected with the pushing core; the pushing handle pushes the pushing core to pass through the puncture needle cavity, so as to push the positioning part out of the puncture needle cavity and into the lung nodule.

2. The lung nodule puncture positioning system of claim 1, wherein, The connector is a pressing sleeve, which fixedly or detachably connects the positioning part and the delivery part.

3. The lung nodule puncture positioning system of claim 1, wherein, The length of the positioning part is not more than 15 mm.

4. The lung nodule puncture positioning system of claim 1, wherein, The puncture needle handle is further provided with a plug, which is used for plugging the channel.

5. The lung nodule puncture positioning system of claim 1, wherein, The puncture needle body is further provided with a first protective sheath pipe for protecting the puncture needle body.

6. The lung nodule puncture positioning system of claim 1, wherein, The pushing core is further provided with a second protective sheath pipe for protecting the pushing core.

7. The lung nodule puncture positioning system of claim 1, wherein, The outer side of the puncture needle body is provided with a plurality of scale marks, which are used for judging the puncture distance.

8. A lung nodule puncture positioning method, characterized by, At least comprising the following steps: a preparation step: planning a puncture path and judging the best puncture site through the data obtained by imaging; a puncture positioning step: under the guidance of imaging, the needle tip part of the puncture needle assembly is aligned along the puncture path to the predetermined position; then, the positioning part is pushed out and released in the lung nodule by using the pushing assembly; a withdrawal of the pushing assembly step: after the lung nodule positioning assembly is released and fixed, the pushing assembly is withdrawn; a withdrawal of the puncture needle assembly step: the puncture needle assembly is withdrawn outwardly to 0.5-3 cm; a second pushing step: the pushing assembly is inserted into the puncture needle cavity again and pushed to the bottom; a complete withdrawal step: the puncture needle assembly and the pushing assembly are completely withdrawn.

9. The lung nodule puncture positioning method of claim 8 wherein, The imaging method is any one of CT, PET, MRI and MRS.

10. The lung nodule puncture positioning method of claim 8, wherein, The positioning part has a first spiral segment, a third spiral segment and a second spiral segment arranged between the first spiral segment and the third spiral segment, and the maximum outer diameter of the second spiral segment is smaller than that of the first spiral segment and the third spiral segment; the maximum outer diameter of the third spiral segment is greater than or equal to that of the first spiral segment.

Images