Pulmonary nodule puncture positioning needle

Abstract

The utility model relates to the technical field of medical instruments, and discloses a pulmonary nodule puncture positioning needle. The pulmonary nodule puncture positioning needle comprises an outer tube, an inner tube and a positioning marking assembly, the outer tube is provided with a through channel and comprises a needle tube and a needle tube seat, and the needle tube seat is arranged at the near end of the needle tube; the positioning marking assembly is arranged in the outer tube in a sliding mode, a positioning marker of the positioning marking assembly is made of shape memory materials, the inner tube is arranged in a channel of the outer tube in a penetrating mode and used for pushing the positioning marker, and the positioning marker is in a J-shaped hook shape when stretching out of the needle tube. During operation, the outer tube is inserted into a target position of a focus of a patient, the inner tube is pushed, the inner tube pushes the positioning marker out of a needle point of the puncture needle tube, and after the positioning marker is pushed out of the needle tube, the J-shaped hook is self-expanded and recovered to be a preset J-shaped hook. Resistance is formed between the J-shaped hook and pulmonary parenchyma of a patient, the J-shaped hook is positioned at the pulmonary nodule of the patient, and the J-shaped hook structure is beneficial for a doctor to touch and position in an operation and accurately determine the position of a focus.

Description

Technical Field

[0001] The utility model embodiment relates to the technical field of medical devices, and in particular to a pulmonary nodule puncture positioning needle. Background Art

[0002] In recent years, with the continuous advancement of imaging detection technology, especially the popularization of high-resolution CT machines, the detection rate of small lung nodules in the human body has increased year by year.

[0003] Currently, for small lung nodules larger than 1 cm in size, doctors can determine the location of the small lung nodules through naked eye observation and finger palpation. However, when the size of the small lung nodules is less than 1 cm, the failure rate of positioning methods through naked eye observation and finger palpation is greatly increased, and there is a risk of excessive surgical resection and increased patient trauma.

[0004] Therefore, how to accurately locate small lung nodules before surgery is a problem faced by every thoracic surgeon. Utility Model Content

[0005] The utility model aims to provide a pulmonary nodule puncture positioning needle to solve the problems in the above-mentioned background technology.

[0006] The utility model embodiment provides a pulmonary nodule puncture positioning needle, comprising: an outer tube, an inner tube and a positioning marking component;

[0007] The outer tube is provided with a through passage, and the outer tube comprises a needle tube and a needle tube seat, and the needle tube seat is arranged at the proximal end of the needle tube;

[0008] The positioning marker assembly is slidably disposed in the outer tube, and the positioning marker assembly comprises: a positioning marker, wherein the positioning marker is made of a shape memory material;

[0009] The inner tube is inserted into the channel and is used to push the positioning marker, and the positioning marker is in a J-shaped hook shape when extending out of the needle tube.

[0010] Based on the above scheme, it can be known that the lung nodule puncture positioning needle of the utility model is provided with an outer tube, an inner tube and a positioning marker assembly. The outer tube is provided with a through channel. The positioning marker assembly includes: a positioning marker, which is slidably arranged in the distal channel of the outer tube. The inner tube is arranged in the channel of the outer tube and is used to push the positioning marker. The positioning marker is in the shape of a J-hook when it is extended out of the outer tube. During the specific operation, the CT machine determines the location of the lung nodule. Under the guidance of the CT machine, the outer tube of the puncture positioning needle is inserted into the target location of the patient's lesion, and the inner tube is pushed. The inner tube pushes the positioning marker out of the needle tip of the puncture positioning needle (pushes out the puncture positioning needle). After the puncture positioning needle is pushed out, the positioning marker self-expands and recovers to a predetermined J-hook. The puncture positioning needle provided by the present application is easy to operate, significantly improves the speed and success rate of the operation, and reduces the risk; the J-shaped hook forms resistance with the patient's lung parenchyma, is positioned at the patient's lung nodule, has a strong grip, is not easy to shift, and can form effective positioning; and the J-shaped hook structure of the positioning marker helps the doctor to touch and locate with his hands during the operation, which can more accurately position the surgical resection. In addition, the J-shaped hook structure is simple, and the difficulty of assembly with the inner tube and the outer tube is relatively low, which is conducive to reducing processing and assembly costs.

[0011] In a feasible solution, the distal end of the positioning marker is provided with a barb. With this structure, the positioning marker is more firmly fixed.

[0012] In a feasible solution, the positioning mark assembly further includes: a connecting member and a developing line;

[0013] The connecting member is arranged at the proximal end of the positioning marker;

[0014] The developing line is connected to the positioning marker through the connecting piece, and the developing line is used for developing under CT. With this structure, it is convenient to observe the positioning marker.

[0015] In a feasible solution, the developing line includes a coating layer and a developing filament, wherein the coating layer covers the developing filament, and the coating layer is an ultra-high molecular weight polyethylene fiber layer. With this structure, hidden and floating lines can be avoided.

[0016] In a feasible solution, the inner tube includes an inner tube seat and a pusher, the inner tube seat is arranged at the proximal end of the outer tube, and the proximal end of the pusher is connected to the inner tube seat;

[0017] The puncture positioning needle further includes: a connecting card seat; the connecting card seat is arranged between the needle tube seat and the inner tube seat, and is rotatably connected to the inner tube seat, and the connecting card seat is used to define the initial position of the needle tube seat and the inner tube seat. With this structure, it is convenient to push the positioning mark component.

[0018] In a feasible solution, the connecting card seat is provided with a through slot, and the through slot is used for the pushing member to pass through;

[0019] The end of the connecting card seat close to the inner tube seat is provided with a connecting portion, and the end of the connecting card seat close to the needle tube seat is provided with a receiving groove;

[0020] The inner tube seat is provided with a matching portion, the matching portion is matched with the connecting portion to limit the position, and the matching portion can rotate relative to the connecting portion;

[0021] The needle tube seat is provided with a connecting block, and the connecting block is used to be embedded in the accommodating groove. With this structure, the connecting block and the inner tube seat can be rotatably connected.

[0022] In a feasible solution, the connecting portion is configured as a protruding column, and the matching portion is configured as a mounting groove; or, the connecting portion is configured as a mounting groove, and the matching portion is configured as a protruding column.

[0023] In a feasible solution, the needle tube seat is provided with a circular convex ring;

[0024] The inner tube seat is provided with an annular groove, and the annular groove is used for the circular convex ring to be inserted. With this structure, the needle tube seat and the inner tube seat are limited in position when they are close to each other.

[0025] In a feasible solution, the inner tube seat is provided with a limiting protrusion;

[0026] The needle tube seat is provided with a limiting groove, and the limiting groove is used for the limiting protrusion to be inserted to limit the circumferential rotation of the needle tube seat. With this structure, the inner tube seat limits the circumferential rotation of the needle tube seat, preventing the inner tube from shaking, and further preventing the positioning marker from shaking and shifting.

[0027] In a feasible solution, the outer wall of the outer tube is provided with scale marks. With this structure, it is convenient to observe the puncture depth of the puncture positioning needle.

[0028] In a feasible solution, the positioning marker is formed by 3D printing. With this forming method, the positioning marker can be processed with higher precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1It is a schematic diagram of the operation of the pulmonary nodule puncture positioning needle in the embodiment of the utility model;

[0031] Figure 2 In the embodiment of the utility model Figure 1 The proximal enlargement in ;

[0032] Figure 3 is a schematic diagram of a positioning mark assembly in an embodiment of the utility model;

[0033] Figure 4 It is a schematic diagram of the positioning marker in the embodiment of the utility model when it is contracted;

[0034] Figure 5 In the embodiment of the utility model Figure 4 The proximal enlargement in ;

[0035] Figure 6 It is a schematic diagram of a needle tube seat in an embodiment of the utility model;

[0036] Figure 7 It is a schematic diagram of the inner tube seat in the embodiment of the utility model;

[0037] Figure 8 It is a schematic diagram of a connection socket in an embodiment of the utility model.

[0038] Numbers in the figure:

[0039] 1. Outer tube; 101. Scale mark; 11. Needle tube seat; 111. Connecting block; 112. Circular convex ring; 113. Limiting groove; 12. Needle tube; 2. Inner tube; 21. Inner tube seat; 211. Mounting groove; 212. Annular groove; 213. Limiting convex block; 22. Pusher; 3. Positioning mark assembly; 31. Positioning mark; 311. Barb; 32. Connector; 33. Developing line; 4. Connecting seat; 41. Protruding column; 42. Accommodating groove; 43. Through groove. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0044] As described in the background technology of this application, currently for small lung nodules larger than 1 cm, doctors can determine the location of small lung nodules by naked eye observation and finger palpation. However, when the size of a small lung nodule is less than 1 cm, the failure rate of the positioning method by naked eye observation and finger palpation is greatly increased, and there is a risk of excessive range during surgical resection and increased patient trauma. Currently, the commonly used positioning methods for small lung nodules before surgery include: CT-guided metal hook positioning, injection of methylene blue staining positioning, intraoperative ultrasound positioning, etc.

[0045] The inventors of this application have found that all of the above methods have some shortcomings: methylene blue injection positioning is only suitable for superficial nodule positioning, and changes in injection dose and time may cause large-area staining, resulting in positioning failure; intraoperative ultrasound has advantages for untouchable nodules, but requires repeated confirmation of the lesion location during surgery, which is complicated and time-consuming, and has high requirements for operators and equipment; metal hook positioning has a high success rate and few complications, but because the wire remains in the chest wall after positioning, the patient must undergo surgery immediately after positioning, which limits the application of this technology to a certain extent. Therefore, how to accurately locate small lung nodules before surgery is a problem faced by every thoracic surgeon.

[0046] In order to solve the above problems, the inventor of the present application proposed the technical solution of the present application, and the specific embodiments are as follows:

[0047] Figure 1 is a schematic diagram of a pulmonary nodule puncture positioning needle in an embodiment of the utility model, Figure 2 In the embodiment of the utility model Figure 1 The proximal enlargement of Figure 3 is a schematic diagram of a positioning mark assembly in an embodiment of the utility model, Figure 4 is a schematic diagram of the positioning marker in the embodiment of the utility model when it is contracted, Figure 5 In the embodiment of the utility model Figure 4 The proximal enlargement of Figure 6 Schematic diagram of the needle tube seat in the embodiment of the utility model, Figure 7 Schematic diagram of the inner tube seat in the embodiment of the utility model, Figure 8 It is a schematic diagram of a connection socket in an embodiment of the utility model.

[0048] like Figures 1 to 8 As shown, the lung nodule puncture positioning needle of this embodiment includes: an outer tube 1, an inner tube 2 and a positioning marking component 3.

[0049] The outer tube 1 of the puncture positioning needle is a hollow tube, and a through channel is provided in the axial direction of the outer tube 1. The outer tube 1 comprises a needle tube 12 and a needle tube seat 11. The needle tube seat 11 is arranged at the proximal end of the needle tube 12, and the distal end of the needle tube 12 is in an inclined needle tip shape to facilitate puncture.

[0050] The positioning mark component 3 includes: a positioning mark 31 .

[0051] The positioning marker 31 is made of shape memory material, and is slidably disposed in the channel of the outer tube 1, and is located at the distal end of the outer tube 1. The positioning marker 31 made of shape memory material has shape memory characteristics, and when installed, the positioning marker 31 is placed in the channel of the outer tube 1 of the puncture positioning needle in a straight line.

[0052] The shape memory material may be a nickel-titanium-based shape memory alloy (Ni-Ti SMA), a copper-based shape memory alloy (CuSMA), an iron-based shape memory alloy (Fe SMA), etc. Specifically, the nickel-titanium-based shape memory alloy may be Ni-Ti-Cu, Ni-Ti-Co, Ni-Ti-Fe, Ni-Ti-Nb, etc.; the copper-based shape memory alloy may be Cu-Zn, Cu-Zn-Al, Cu-Zn-Sn, Cu-Zn-Si, Cu-Zn-Ga, Cu-Sn, etc.; the iron-based shape memory alloy may be Fe-Pt, Fe-Mn-Si, Fe-Ni-Co-Ti, Fe-Mn-Al-Ni, Fe-C-Mn-Si-Cr-Ni, etc.

[0053] The inner tube 2 is inserted into the channel of the outer tube 1, the distal end of the inner tube 2 abuts against the positioning marker 31, and the proximal end of the inner tube 2 extends out of the needle tube seat 11. The inner tube 2 is used to push the positioning marker 31 out of the needle tube 12. After the positioning marker 31 is pushed out of the needle tube 12 of the puncture positioning needle, it returns to the shape of a preformed J-hook and is firmly fixed on the pulmonary nodule.

[0054] In this embodiment, the positioning markers in the outer tube 1 of the puncture positioning needle are in a contracted state in the shape of a letter "I". When in use, under the guidance of the CT machine, the puncture positioning needle is inserted into the target position of the patient's lesion, and the inner tube 2 is pushed, and the inner tube 2 pushes the positioning marker 31 out of the needle tip of the needle tube 12 (pushes out the puncture positioning needle). After pushing out the puncture positioning needle, the positioning marker 31 self-expands and recovers to a predetermined J-shaped hook, and is firmly anchored on the patient's pulmonary nodule.

[0055] It is not difficult to find from the above content that the lung nodule puncture positioning needle of this embodiment is provided with an outer tube 1, an inner tube 2 and a positioning marker assembly 3. The outer tube 1 is provided with a through channel. The positioning marker assembly 3 includes: a positioning marker 31. The positioning marker 31 is slidably arranged in the channel of the outer tube 1. The inner tube 2 is arranged in the channel of the outer tube 1 and is used to push the positioning marker 31. The positioning marker 31 is a J-shaped hook positioning structure when it is extended out of the outer tube 1. In the lung nodule puncture positioning needle of this embodiment, the CT machine determines the position of the lung nodule. Under the guidance of the CT machine, the outer tube 1 of the puncture positioning needle is inserted into the target position of the patient's lesion and pushes the inner tube 2. The inner tube 2 pushes the positioning marker 31 out of the needle tip of the puncture positioning needle (pushes out the puncture positioning needle). After the puncture positioning needle is pushed out, the positioning marker 31 self-expands and recovers to a predetermined J-shaped hook. The J-hook positioning marker 31 forms resistance with the patient's lung parenchyma, and is positioned at the patient's lung nodule, effectively positioning the marker. The expandable stent structure of the positioning marker 31 helps the doctor to locate the position by touch during the operation, so that the surgical resection position can be more precise.

[0056] Optional, such as Figure 3 As shown, in the lung nodule puncture positioning needle of this embodiment, the distal end of the positioning marker 31 is provided with a barb 311. After the positioning marker 31 is pushed out of the outer tube 1, it returns to a predetermined J-shaped hook shape in the human body, and the barb 311 at the distal end forms resistance and anchors with the lung parenchyma. The J-shaped hook and the barb at the distal end cooperate to play a double anchoring role, effectively preventing the positioning marker 31 from shifting, and further helping the doctor to touch and locate by hand during the operation to clarify the surgical resection site.

[0057] Furthermore, the pulmonary nodule puncture positioning needle in this embodiment, the positioning marker assembly 3 also includes: a connecting piece 32 and a developing line 33, the developing line 33 is arranged at the proximal end of the positioning marker 31, the connecting piece 32 is sleeved on the positioning marker 31, and the developing line 33 is fixedly connected to the positioning marker 31 through the connecting piece 32. The developing line 33 is used to display the shape and position of the puncture positioning needle in the patient's body, so as to observe the state and position of the puncture positioning needle in real time.

[0058] Optionally, the connecting member 32 is a riveted tube, and two ends of the riveted tube are respectively sleeved with the developing line 33 and the positioning marker 31 .

[0059] In this embodiment, the development line can be developed under CT, which facilitates the determination of the positioning depth of the positioning marker.

[0060] Furthermore, in the lung nodule puncture positioning needle in this embodiment, the developing line 33 includes a coating layer and a developing wire, wherein the coating layer is coated on the outside of the developing wire, and the coating layer is an ultra-high molecular weight polyethylene fiber layer, so that the developing line 33 has a certain hardness while maintaining flexibility, thereby avoiding hiding and floating of the line.

[0061] Furthermore, in one embodiment, if Figure 4 , Figure 5 As shown, the inner tube 2 includes an inner tube seat 21 and a pusher 22 . The inner tube seat 21 is disposed at the proximal end of the outer tube 1 , and the proximal end of the pusher 22 is connected to the inner tube seat 21 . The pusher 22 is used to push the positioning marker 31 out of the outer tube 1 .

[0062] In one embodiment, if Figure 4 and Figure 5 As shown, the puncture positioning needle also includes a connecting card seat 4, which is arranged between the needle tube seat 11 and the inner tube seat 21, and the connecting card seat 4 is rotatably connected to the inner tube seat 21. The connecting card seat 4 is used to define the initial position of the needle tube seat 11 and the inner tube seat 21, and can also serve as a bearing auxiliary structure to facilitate and stably push the positioning marking component 3.

[0063] In this embodiment, when the positioning marker 31 is compressed in the outer tube 1, the needle tube seat 11, the connecting seat 4 and the inner tube seat 21 are in the same line ( Figure 5 As shown), the connecting card seat 4 keeps the needle tube seat 11 away from the inner tube seat 21, ensuring that the positioning marker 31 is not pushed out by the pusher 22 in the outer tube 1; when it is necessary to release and push out the positioning marker 31, the connecting card seat 4 is rotated, that is, the connecting card seat 4 is rotated relative to the inner tube seat 21 until the inner tube seat 21 is separated from the connecting card seat 4. In this embodiment, when the connecting card seat 4 is perpendicular to the inner tube seat 21, the inner tube seat 21 is separated from the connecting card seat 4 ( Figure 2As shown in the figure, when the connecting base 4 rotates, the needle tube seat 11 and the inner tube seat 21 approach each other, and the distal end of the inner tube 2 pushes the positioning marker 31 out of the outer tube 1. In other embodiments, the relative rotation angle between the inner tube seat 21 and the connecting base 4 is not limited, as long as the inner tube seat 21 can be separated from the through groove of the connecting base 4.

[0064] In one embodiment, a through slot 43 is provided on the top surface of the connecting socket 4 , and the pushing member 22 passes through the through slot 43 of the connecting socket 4 and is fixedly connected to the inner tube socket 21 .

[0065] In one embodiment, a connecting portion is provided at one end of the connecting socket 4 close to the inner tube seat 21, and a receiving groove 42 is provided at one end of the connecting socket 4 close to the needle tube seat 11; the inner tube seat 21 is provided with a matching portion, the matching portion and the connecting portion are limited in position, and the matching portion can rotate relative to the connecting portion.

[0066] For example, Figure 7 and Figure 8 As shown, the connection part is set as a protruding column 41, and the matching part is set as a mounting groove 211; during assembly, the protruding column 41 is inserted into the mounting groove 211, and the protruding column 41 can rotate in the mounting groove 211, thereby realizing the rotation of the inner tube seat 21 relative to the connecting clamp 4. Of course, in another optional solution, the protruding column can also be set on the inner tube seat 21, and correspondingly, the connection part on the connecting clamp 4 can be set as a mounting groove.

[0067] In one embodiment, if Figure 5 , Figure 6 and Figure 8 As shown, the needle tube seat 11 is provided with a connecting block 111. When the needle tube seat 11, the connecting block 4 and the inner tube seat 21 are in the same line, the connecting block 111 of the needle tube seat 11 is embedded in the receiving groove 42 of the connecting block 4, so that the needle tube seat 11 is fixed in the receiving groove 42, thereby increasing the stability of the pushing member 22 during movement.

[0068] Further, such as Figure 6 and Figure 7 As shown, a circular convex ring 112 is provided at the proximal end of the needle tube seat 11, and an annular groove 212 is provided at the inner tube seat 21. When the needle tube seat 11 and the inner tube seat 21 are close to each other, the circular convex ring 112 of the needle tube seat 11 is inserted into the annular groove 212 of the inner tube seat 21, so that the axes of the needle tube seat 11 and the inner tube seat 21 are consistent, and the needle tube seat 11 and the inner tube seat 21 are mutually limited and positioned to ensure smooth movement of the push member 22.

[0069] Further, such as Figure 6 and Figure 7As shown, the inner tube seat 21 is provided with a limiting protrusion 213, and the needle tube seat 11 is provided with a limiting groove 113. When the needle tube seat 11 and the inner tube seat 21 are close to each other, the limiting protrusion 213 of the inner tube seat 21 is inserted into the limiting groove 113 of the needle tube seat 11, so as to limit the circumferential rotation of the needle tube seat 11. Of course, in other embodiments, the manner in which the inner tube seat 21 limits the circumferential rotation of the needle tube seat 11 is not limited to the above description or the figure, for example, the needle tube seat 11 may also be provided with a limiting protrusion, and the corresponding inner tube seat 21 may be provided with a limiting groove, and the limiting protrusion is engaged with the limiting groove.

[0070] Optionally, in the lung nodule puncture positioning needle in this embodiment, the circumferential outer wall of the outer tube 11 is provided with scale marks 101 at equal intervals, and the scale marks 101 are used to indicate the puncture depth of the puncture positioning needle.

[0071] Furthermore, the pulmonary nodule puncture positioning needle in this embodiment, the positioning marker 31 is formed by 3D printing, and the steps of printing and forming are:

[0072] 1) Establish a three-dimensional model of the J-hook;

[0073] 2) Decompose the 3D model into thin slices with a thickness of 25 to 45 μm to form a scanning path for 3D printing;

[0074] 3) preparing a mixed powder material, wherein the mass ratio of nickel to titanium is 40-60:40-60; and delivering the mixed powder material to a molding chamber;

[0075] 4) Evacuate the molding chamber and then inject high-purity inert gas; repeat 3 times;

[0076] 5) Import the scanning path into the molding equipment and set the processing parameters: laser spot diameter is 50-70μm, laser power is 80-140W, scanning rate is 150-300mm / s, scanning spacing is 40-110μm, and powder thickness is 25-45μm;

[0077] 6) Melt the metal powder according to the scanning path to form a thin sheet, and stack it layer by layer until a J-shaped hook component is formed.

[0078] Among them, the preferred processing parameters are: power 100 W, scanning rate 200 mm / s, scanning spacing 80 μm, and powder thickness 30 μm.

[0079] The working process of the pulmonary nodule puncture positioning needle of the utility model is as follows:

[0080] ① First, determine the location of the lung nodule by CT, and then send the puncture positioning needle to the target location under the guidance of CT, so that the positioning marker 31 is located at the target location;

[0081] ② Rotate the connecting block 111 to be perpendicular to the inner tube seat 21, push the pusher 22 to the bottom through the inner tube seat 21, so that the positioning marker 31 moves along the channel in the needle tube 12 to the outside of the distal end of the needle tube 12 and is released;

[0082] ③ Pull out the inner tube 2 completely, withdraw the needle tube 12, so that the needle tip is located between the outer wall of the chest cavity and the lung, and then insert the pusher 22 of the inner tube 2 into the needle tube 12 to completely push out the imaging line 33 and the positioning marker 31;

[0083] ④Finally, pull out the needle tube 12 and the inner tube 2 together.

[0084] In the present invention, unless otherwise clearly specified and limited, a first feature being “on” or “under” a second feature may mean that the first feature and the second feature are in direct contact, or the first feature and the second feature are in indirect contact via an intermediate medium.

[0085] Moreover, the first feature being “above”, “above”, and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being “below”, “below”, and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0086] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A pulmonary nodule puncture positioning needle, characterized in that: include: Outer tube, inner tube and positioning marker assembly; The outer tube is provided with a through passage, and the outer tube comprises a needle tube and a needle tube seat, and the needle tube seat is arranged at the proximal end of the needle tube; The positioning marker assembly is slidably disposed in the outer tube, and the positioning marker assembly comprises: a positioning marker, wherein the positioning marker is made of a shape memory material; The inner tube is inserted into the channel and is used to push the positioning marker, and the positioning marker is in a J-shaped hook shape when extending out of the needle tube.

2. The pulmonary nodule puncture positioning needle according to claim 1, characterized in that: The distal end of the positioning marker is provided with a barb.

3. The pulmonary nodule puncture positioning needle according to claim 2, characterized in that: The positioning mark assembly also includes: a connecting piece and a developing line; The connecting member is arranged at the proximal end of the positioning marker; The developing line is connected to the positioning marker through the connecting piece.

4. The pulmonary nodule puncture positioning needle according to claim 3, characterized in that: The developing line comprises a coating layer and a developing wire, wherein the coating layer covers the developing wire; The coating layer is an ultra-high molecular weight polyethylene fiber layer.

5. The pulmonary nodule puncture positioning needle according to any one of claims 1 to 4, characterized in that: The inner tube comprises an inner tube seat and a pusher, wherein the inner tube seat is arranged at the proximal end of the outer tube, and the proximal end of the pusher is connected to the inner tube seat; The puncture positioning needle also includes: a connecting seat; the connecting seat is arranged between the needle tube seat and the inner tube seat, and is rotatably connected to the inner tube seat. The connecting seat is used to limit the initial position of the needle tube seat and the inner tube seat.

6. The pulmonary nodule puncture positioning needle according to claim 5, characterized in that: The connecting card seat is provided with a through slot, and the through slot is used for the pushing member to pass through; The end of the connecting card seat close to the inner tube seat is provided with a connecting portion, and the end of the connecting card seat close to the needle tube seat is provided with a receiving groove; The inner tube seat is provided with a matching portion, the matching portion is matched with the connecting portion to limit the position, and the matching portion can rotate relative to the connecting portion; The needle tube seat is provided with a connecting block, and the connecting block is used to be embedded in the accommodating groove.

7. The pulmonary nodule puncture positioning needle according to claim 6, characterized in that: The connecting portion is configured as a protruding column, and the matching portion is configured as a mounting groove; Alternatively, the connecting portion is configured as a mounting groove, and the matching portion is configured as a protruding column.

8. The pulmonary nodule puncture positioning needle according to claim 5, characterized in that: The needle tube seat is provided with a circular convex ring; The inner pipe seat is provided with an annular groove, and the annular groove is used for the circular convex ring to be inserted.

9. The pulmonary nodule puncture positioning needle according to claim 5, characterized in that: The inner tube seat is provided with a limiting protrusion; The needle tube seat is provided with a limiting groove, and the limiting groove is used for the limiting protrusion to be inserted to limit the circumferential rotation of the needle tube seat.

10. The pulmonary nodule puncture positioning needle according to claim 1, characterized in that: The positioning marker is formed by 3D printing.

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