Coaxial puncture needle
By setting a fixation element in the coaxial puncture needle to secure it to the lung tissue, the problem of detachment caused by shallow needle depth was solved, thus achieving successful puncture and reliable treatment.
Patent Information
- Application Number
- CN202420807965.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-04-17
AI Technical Summary
When the existing coaxial puncture needle is used for lung lesions near the pleura, the needle depth is shallow. When the needle core is pulled out to replace the biopsy gun or ablation needle, it is easy to detach from the lung tissue, resulting in puncture failure and hindering diagnosis and treatment.
Design a coaxial puncture needle, including a first needle tube, a second needle tube, and a fixation element. After the needle core reaches the lesion location, the fixation element extends from between the first and second needle tubes and fixes them to the lung tissue, limiting the first and second needle tubes to be in a plane perpendicular to the axis of the first needle tube, thus preventing them from dislodging.
This effectively prevents the needle from detaching from the lung tissue, ensuring a successful puncture procedure and facilitating diagnosis and treatment.
Smart Images
Figure CN222444271U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a coaxial puncture needle. Background Art
[0002] Lung space-occupying lesions usually refer to masses or lumps in the lungs, which require lung puncture biopsy and pathological diagnosis; lung space-occupying lesions that cannot be surgically removed usually refer to lung malignant tumors that cannot be surgically removed, which require tumor ablation treatment. Coaxial puncture needle is a commonly used interventional puncture tool in medicine. It mainly punctures the diseased tissue inside the human body to establish a channel between the outside world and the diseased tissue. Through this channel, multiple puncture biopsies or tumor ablation interventional treatments can be performed on the diseased tissue.
[0003] In the prior art, a coaxial puncture needle is composed of a needle tube and a needle core. During puncture, the needle core is inserted into the needle tube and screwed together to perform puncture. When the needle tip of the needle core reaches the location of the lung lesion, the needle tube is retained and the needle core is pulled out. The needle tube is then used as a channel to insert a puncture biopsy gun or ablation needle through the needle tube.
[0004] However, when the location of the lung lesion is close to the pleura and when the needle core is pulled out to replace the puncture biopsy gun or ablation needle, the needle tube of the coaxial puncture needle enters the lung tissue shallowly and is likely to detach from the lung tissue, resulting in failure of the puncture operation, which is not conducive to diagnosis and treatment. Utility Model Content
[0005] The embodiment of the utility model provides a coaxial puncture needle to solve the problem that when the location of the lung lesion is close to the pleura and when the needle core is pulled out to replace the puncture biopsy gun or ablation needle, the needle tube of the coaxial puncture needle enters the lung tissue at a shallow depth, which easily causes the needle tube of the coaxial puncture needle to separate from the lung tissue, resulting in failure of the puncture operation and being unfavorable for diagnosis and treatment.
[0006] The embodiment of the utility model provides a coaxial puncture needle, comprising a first needle tube, a second needle tube, a needle core and a fixing member;
[0007] The second needle tube is sleeved inside the first needle tube, a gap is formed between the first needle tube and the second needle tube, the needle core is movably inserted into the second needle tube, and the fixing member is movably arranged between the first needle tube and the second needle tube;
[0008] The fixing member is constructed to extend from between the first needle tube and the second needle tube and be fixed to the lung tissue when the needle core reaches the location of the lung lesion, so as to limit the first needle tube and the second needle tube in a plane perpendicular to the axial direction of the first needle tube.
[0009] In a possible implementation manner, the first needle tube and the second needle tube are coaxially arranged, and a connecting wall is fixed between the first needle tube and the second needle tube.
[0010] In a possible implementation, a plurality of slideways are provided between the first needle tube and the second needle tube, the plurality of slideways are arranged at intervals along the circumferential direction of the first needle tube, each of the slideways includes two connecting walls, and each of the slideways extends along the axial direction of the first needle tube;
[0011] Each of the fixing members corresponds to one of the slideways, and each of the fixing members is slidably disposed in the slideway.
[0012] In a possible embodiment, the fixing member is a fixing wire, which includes a driving part and an elastic hook connected to each other. The elastic hook can be set between the first needle tube and the second needle tube through elastic deformation. The driving part can drive the elastic hook to extend from between the first needle tube and the second needle tube, and the elastic hook is hooked on the lung tissue.
[0013] In a possible implementation, the driving portion includes a driving section and a sliding section that are connected to each other, the driving section is located outside the first needle tube and the second needle tube, and the sliding section is slidably disposed in the slideway.
[0014] In a possible implementation manner, the sliding section is in contact with the two connecting walls on both sides of the first needle tube in the circumferential direction respectively.
[0015] In a possible implementation manner, when the elastic hook extends from between the first needle tube and the second needle tube, the elastic hook bends in a direction away from the axis of the first needle tube.
[0016] In a possible implementation, a plurality of the slideways are arranged at equal intervals along the circumferential direction of the first needle tube.
[0017] In a possible implementation manner, a handle is further included, and the handle is located outside the first needle tube and the second needle tube, and the plurality of fixing wires are fixedly connected to the handle.
[0018] In a possible implementation manner, the handle has an avoidance hole, and the needle core can pass through the avoidance hole.
[0019] The embodiment of the utility model provides a coaxial puncture needle, comprising a first needle tube, a second needle tube, a needle core and a fixing member; the second needle tube is sleeved inside the first needle tube, there is a gap between the first needle tube and the second needle tube, the needle core can be movably inserted into the second needle tube, and the fixing member can be movably arranged between the first needle tube and the second needle tube; the fixing member is constructed so that when the needle core reaches the position of the lung lesion, it extends from between the first needle tube and the second needle tube and is fixed to the lung tissue, so as to limit the first needle tube and the second needle tube in a plane perpendicular to the axial direction of the first needle tube. When the needle core of the coaxial puncture needle reaches the position of the lung lesion, the fixing member extends from between the first needle tube and the second needle tube and is fixed to the lung tissue, and the fixing member limits the first needle tube and the second needle tube in a plane perpendicular to the axial direction of the first needle tube, which can prevent the first needle tube and the second needle tube from being separated from the lung tissue, thereby making the puncture operation successful and facilitating diagnosis and treatment. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] 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.
[0021] Figure 1 A schematic diagram of the application of a coaxial puncture needle is provided for an embodiment of the utility model;
[0022] Figure 2 for Figure 1 A schematic diagram of the structure of the coaxial puncture needle when the elastic hook is in an elastic state;
[0023] Figure 3 for Figure 2 A cross-sectional schematic diagram of a coaxial puncture needle;
[0024] Figure 4 for Figure 1 A schematic diagram of the structure of the coaxial puncture needle when the elastic hook is in the initial state;
[0025] Figure 5 for Figure 4 A cross-sectional schematic diagram of a coaxial puncture needle;
[0026] Figure 6 A schematic cross-sectional view of a first needle tube, a second needle tube and a connecting wall provided in an embodiment of the utility model;
[0027] Figure 7 A cross-sectional schematic diagram of a fixing member provided in an embodiment of the utility model;
[0028] Figure 8A schematic cross-sectional view of a handle provided in an embodiment of the utility model.
[0029] Description of reference numerals:
[0030] 100-chest wall; 200-lung tissue;
[0031] 1-coaxial puncture needle; 10-first needle tube;
[0032] 101-connecting wall; 10a-slideway;
[0033] 20-second needle tube; 30-needle core;
[0034] 40-fixing member; 41-driving unit;
[0035] 411-driving section; 412-sliding section;
[0036] 42-elastic hook; 50-handle;
[0037] 501-Avoidance hole. DETAILED DESCRIPTION
[0038] 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 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.
[0039] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" 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 communication with each other; 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.
[0041] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a 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. A first feature being "below", "below" or "below" a 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.
[0042] In the above description, 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.
[0043] As described in the background technology, the coaxial puncture needle is composed of a needle tube and a needle core. During puncture, the needle core is inserted into the needle tube and screwed together for puncture. When the needle tip of the needle core reaches the location of the lung lesion, the needle tube is retained and the needle core is pulled out. The needle tube is then used as a channel to insert a puncture biopsy gun or ablation needle through the needle tube. When the location of the lung lesion is close to the pleura, and when the needle core is pulled out to replace the puncture biopsy gun or ablation needle, the needle tube of the coaxial puncture needle is easily separated from the lung tissue because the depth of the needle tube entering the lung tissue is shallow, resulting in failure of the puncture operation, which is not conducive to diagnosis and treatment. The inventors have discovered that the cause of this problem is that when the location of the lung lesion is close to the pleura and when the needle core is pulled out to replace the puncture biopsy gun or ablation needle, the coaxial puncture needle enters the lung tissue at a shallow depth and there are no other components to limit the plane perpendicular to the axis of the needle tube. The needle tube is subjected to the force of the needle core, puncture biopsy gun or ablation needle, and it is easy for the needle tube to detach from the lung tissue, resulting in failure of the puncture operation, which is not conducive to diagnosis and treatment.
[0044] In order to solve the above problems, an embodiment of the utility model provides a coaxial puncture needle, which is provided with a fixing part, a first needle tube and a second needle tube. When the needle core of the coaxial puncture needle reaches the position of the lung lesion, the fixing part extends from between the first needle tube and the second needle tube and is fixed to the lung tissue. The fixing part limits the first needle tube and the second needle tube in a plane perpendicular to the axial direction of the first needle tube, which can prevent the first needle tube and the second needle tube from being separated from the lung tissue, thereby making the puncture operation successful and facilitating diagnosis and treatment.
[0045] The coaxial puncture needle provided by the embodiment of the utility model is described in detail below in conjunction with specific embodiments.
[0046] like Figures 1 to 5 As shown, an embodiment of the utility model provides a coaxial puncture needle 1, comprising a first needle tube 10, a second needle tube 20, a needle core 30 and a fixing member 40; the second needle tube 20 is sleeved inside the first needle tube 10, and there is a gap between the first needle tube 10 and the second needle tube 20, the needle core 30 is movably inserted into the second needle tube 20, and the fixing member 40 is movably arranged between the first needle tube 10 and the second needle tube 20; the fixing member 40 is constructed to extend from between the first needle tube 10 and the second needle tube 20 and be fixed to the lung tissue when the needle core 30 reaches the position of the lung lesion, so as to limit the first needle tube 10 and the second needle tube 20 in a plane perpendicular to the axial direction of the first needle tube 10.
[0047] Among them, Figure 1 As shown, the pleura is a thin film covering the inner surface of the chest wall 100 of the human body. The lung tissue 200 includes lung parenchyma and lung interstitium; lung parenchyma refers to the bronchi and alveoli in the lungs, which are the main places for gas exchange; lung interstitium refers to the connective tissue, blood vessels, nerves, etc. distributed between the bronchi and alveoli, which play a supporting and protective role. Pulmonary lesions refer to the part of the lung tissue where lesions occur. In this embodiment, the lung lesions can be lung space-occupying lesions that can be surgically removed or lung space-occupying lesions that cannot be surgically removed.
[0048] The patient is scanned by a computer tomography device to determine the part of the lung tissue that is diseased, which is the lung lesion, and the location of the lung lesion on the lung tissue is the location of the lung lesion.
[0049] The first needle tube 10 and the second needle tube 20 are both cylindrical tubes. In this embodiment, the length of the first needle tube 10 is equal to the length of the second needle tube 20.
[0050] The needle core 30 has a needle tip, and the needle tip of the needle core 30 extends out of the first needle tube 10 and the second needle tube 20, so that the needle tip can easily enter the lung tissue inside the human body through puncture.
[0051] The needle core 30 and the second needle tube 20 may be connected by threads.
[0052] The specific process of the coaxial puncture needle 1 is as follows: the patient is scanned by a computer tomography device to determine the location of the patient's lung lesions on the lung tissue, and the patient is determined to lie flat, sideways or prone, and a puncture positioning paper is pasted on the patient's skin; then, the patient is scanned again by a computer tomography device to determine the puncture point and puncture depth of the human epidermis, and the puncture point is disinfected and anesthetized; then, the coaxial puncture needle 1 is inserted through the puncture point on the skin to a predetermined puncture depth, which can be understood as that after the needle tip of the needle core 30 reaches the location of the lung lesion, the fixing member 40 is pushed out from between the first needle tube 10 and the second needle tube 20 and fixed to the lung tissue (see Figure 1 , Figure 4 and Figure 5 After that, the needle core 30 is pulled out, the biopsy gun is replaced, and a puncture biopsy is performed, or the ablation needle is replaced to perform tumor ablation treatment; after that, after the puncture biopsy or tumor ablation is completed, the fixing member 40 is pulled, and the extended part of the fixing member 40 is returned to the space between the first needle tube 10 and the second needle tube 20 (see Figure 2 and Figure 3 Afterwards, pull out the coaxial extraction needle.
[0053] It should be noted that by scanning the patient with a computer tomography device, the position of the fixing member 40 on the lung tissue can be checked; by scanning the patient with a computer tomography device, the position where the needle tip of the needle core 30 reaches the lung lesion can be checked.
[0054] It should also be noted that when the needle tip of the needle core 30 reaches the location of the lung lesion, parts of the first needle tube 10 and the second needle tube 20 enter the lung tissue.
[0055] After the needle core 30 of the coaxial puncture needle 1 provided in the embodiment of the utility model reaches the location of the lung lesion, the fixing member 40 extends from between the first needle tube 10 and the second needle tube 20 and is fixed to the lung tissue. The fixing member 40 limits the first needle tube 10 and the second needle tube 20 in a plane perpendicular to the axial direction of the first needle tube 10, which can prevent the first needle tube 10 and the second needle tube 20 from being separated from the lung tissue in the plane perpendicular to the axial direction of the first needle tube 10, thereby making the puncture operation successful and facilitating diagnosis and treatment.
[0056] In a possible implementation, Figure 6 As shown, the first needle tube 10 and the second needle tube 20 are coaxially arranged, and a connecting wall 101 is fixed between the first needle tube 10 and the second needle tube 20 .
[0057] The axis of the first needle tube 10 and the axis of the second needle tube 20 are arranged collinearly, and the diameter of the first needle tube 10 is larger than the diameter of the second needle tube 20. In this way, a gap can be provided between the first needle tube 10 and the second needle tube 20.
[0058] A plurality of slideways 10a are arranged between the first needle tube 10 and the second needle tube 20, and the plurality of slideways 10a are arranged at intervals along the circumferential direction of the first needle tube 10, and each slideway 10a extends along the axial direction of the first needle tube 10. Each slideway 10a includes two connecting walls 101, and each slideway 10a is composed of the inner wall of the first needle tube 10, the outer wall of the second needle tube 20 and the two connecting walls 101.
[0059] The connecting wall 101 is perpendicular to the first needle tube 10 and the second needle tube 20 .
[0060] Each fixing member 40 corresponds to a slideway 10a, and each fixing member 40 is slidably disposed in the slideway 10a. In this embodiment, four slideways 10a are disposed between the first needle tube 10 and the second needle tube 20, and the four slideways 10a are equally spaced along the circumferential direction of the first needle tube 10, and a fixing member 40 is slidably disposed in each slideway 10a.
[0061] In a possible implementation manner, the fixing member 40 is a fixing wire. Figure 7 As shown, the fixing wire includes a driving part 41 and an elastic hook 42 connected to each other. The elastic hook 42 can be arranged between the first needle tube 10 and the second needle tube 20 through elastic deformation. The driving part 41 can drive the elastic hook 42 to extend from between the first needle tube 10 and the second needle tube 20, and the elastic hook 42 is hooked on the lung tissue.
[0062] The material of the fixing wire may be metal. In this embodiment, the fixing wire is a steel wire.
[0063] The driving portion 41 includes a driving section 411 and a sliding section 412 connected to each other. The driving section 411 is located outside the first needle tube 10 and the second needle tube 20 , and the sliding section 412 is slidably disposed in the slideway 10 a .
[0064] The driving section 411 and the sliding section 412 extend along the extending direction of the slideway 10 a.
[0065] The cross-sectional shape of the sliding section 412 matches the cross-sectional shape of the slideway 10a. Specifically, the sliding section 412 contacts the two connecting walls 101 on both sides of the circumferential direction of the first needle tube 10, so that the sliding section 412 can be limited in the circumferential direction of the first needle tube 10; the sliding section 412 contacts the inner wall of the first needle tube 10 and the outer wall of the second needle tube 20 on both sides of the radial direction of the first needle tube 10, so that the sliding section 412 can be limited in the radial direction of the first needle tube 10.
[0066] The elastic hook 42 and the sliding section 412 can be formed in one piece or connected by welding. The elastic hook 42 is made of spring steel.
[0067] like Figure 4 and Figure 5As shown, the state where the elastic hook 42 extends from between the first needle tube 10 and the second needle tube 20 is the initial state; Figure 2 and Figure 3 As shown, the elastic hook 42 is in an elastic state when it is located between the first needle tube 10 and the second needle tube 20 , that is, the elastic hook 42 is in an elastic state when it is not exposed from the first needle tube 10 and the second needle tube 20 .
[0068] Figure 7 The elastic hook 42 is in the initial state. Figure 7 As shown, when the elastic hook 42 is in the initial state, the shape of the elastic hook 42 is a curve. Figure 2 and Figure 3 As shown, when the elastic hook 42 is in an elastic state, the shape of the elastic hook 42 can be a straight line.
[0069] In this embodiment, four fixing wires are arranged at equal intervals along the circumferential direction of the first needle tube 10. When the needle tip of the needle core 30 reaches the location of the lung lesion, the first needle tube 10, the second needle tube 20 and the needle core 30 are partially located inside the lung tissue, pushing the driving sections 411 of the four fixing members 40, the driving sections 411 enter the slideway 10a, the driving sections 411 drive the sliding sections 412 to slide in the slideway 10a, and the sliding sections 412 drive the elastic hook 42 to extend out of the first needle tube 10 and the second needle tube 20. When the elastic hook 42 extends from between the first needle tube 10 and the second needle tube 20, the elastic hook 42 moves in a direction away from the axis of the first needle tube 10. The elastic hook 42 is hooked on the lung tissue, so that the elastic hooks 42 of the four fixing wires are fixed to the lung tissue, the four fixing wires are respectively in contact with the inner wall of the first needle tube 10, and the four fixing wires are respectively in contact with the outer wall of the second needle tube 20. The four fixing wires can limit the first needle tube 10 and the second needle tube 20 in a plane perpendicular to the axis of the first needle tube 10, so that the first needle tube 10 and the second needle tube 20 cannot move in the plane perpendicular to the axis of the first needle tube 10, thereby making the puncture operation successful, which is beneficial to diagnosis and treatment.
[0070] When the puncture biopsy or tumor ablation is completed, the driving section 411 of the fixed wire is pulled, and the driving section 411 drives the sliding section 412 to slide in the slideway 10a, and the sliding section 412 drives the elastic hook 42 to separate from the lung tissue, and the elastic hook 42 enters the slideway 10a, and the elastic hook 42 is squeezed by the inner wall of the slideway 10a and elastically deformed, thereby returning to between the first needle tube 10 and the second needle tube 20.
[0071] In a possible implementation, Figure 2 As shown, the coaxial puncture needle 1 further includes a handle 50 , which is located outside the first needle tube 10 and the second needle tube 20 , and a plurality of fixing wires are fixedly connected to the handle 50 .
[0072] The handle 50 may be made of metal, and the fixing wire and the handle 50 may be connected by welding.
[0073] like Figure 4 and Figure 5 As shown, the handle 50 can push the four fixing wires so that after the elastic hooks 42 of the four fixing wires are fixed to the lung tissue, the handle 50 respectively abuts against the first needle tube 10 and the second needle tube 20, so that the handle 50 limits the first needle tube 10 and the second needle tube 20 in the axial direction of the first needle tube 10, which can prevent the first needle tube 10 and the second needle tube 20 from being separated from the lung tissue in the axial direction of the first needle tube 10, thereby avoiding the occurrence of pneumothorax.
[0074] like Figure 8 As shown, the handle 50 has an avoidance hole 501, and the needle core 30 can pass through the avoidance hole 501. In this way, the needle core 30 can be pulled out, so that the biopsy gun or the ablation needle can be replaced.
[0075] 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 coaxial puncture needle, characterized in that: It includes a first needle tube, a second needle tube, a needle core and a fixing piece; The second needle tube is sleeved inside the first needle tube, a gap is formed between the first needle tube and the second needle tube, the needle core is movably inserted into the second needle tube, and the fixing member is movably arranged between the first needle tube and the second needle tube; The fixing member is constructed to extend from between the first needle tube and the second needle tube and be fixed to the lung tissue when the needle core reaches the location of the lung lesion, so as to limit the first needle tube and the second needle tube in a plane perpendicular to the axial direction of the first needle tube.
2. The coaxial puncture needle according to claim 1, characterized in that: The first needle tube is coaxially arranged with the second needle tube, and a connecting wall is fixed between the first needle tube and the second needle tube.
3. The coaxial puncture needle according to claim 2, characterized in that: A plurality of slideways are arranged between the first needle tube and the second needle tube, the plurality of slideways are arranged at intervals along the circumferential direction of the first needle tube, each of the slideways comprises two connecting walls, and each of the slideways extends along the axial direction of the first needle tube; Each of the fixing members corresponds to one of the slideways, and each of the fixing members is slidably disposed in the slideway.
4. The coaxial puncture needle according to claim 3, characterized in that: The fixing member is a fixing wire, which includes a driving part and an elastic hook connected to each other. The elastic hook can be set between the first needle tube and the second needle tube through elastic deformation. The driving part can drive the elastic hook to extend from between the first needle tube and the second needle tube, and the elastic hook is hooked on the lung tissue.
5. The coaxial puncture needle according to claim 4, characterized in that: The driving part comprises a driving section and a sliding section which are connected to each other. The driving section is located outside the first needle tube and the second needle tube, and the sliding section is slidably arranged in the slideway.
6. The coaxial puncture needle according to claim 5, characterized in that: The sliding section is in contact with the two connecting walls at both sides of the first needle tube in the circumferential direction.
7. The coaxial puncture needle according to claim 4, characterized in that: When the elastic hook extends from between the first needle tube and the second needle tube, the elastic hook bends in a direction away from the axis of the first needle tube.
8. The coaxial puncture needle according to any one of claims 3 to 7, characterized in that: The plurality of slideways are arranged at equal intervals along the circumferential direction of the first needle tube.
9. The coaxial puncture needle according to any one of claims 4 to 7, characterized in that: It also includes a handle, which is located outside the first needle tube and the second needle tube, and a plurality of fixing wires are fixedly connected to the handle.
10. The coaxial puncture needle according to claim 9, characterized in that: The handle has an avoidance hole, and the needle core can pass through the avoidance hole.