Novel pulmonary nodule positioning needle

Abstract

The utility model relates to a novel pulmonary nodule positioning needle which comprises a puncture needle, a pushing device and a positioning device, and the puncture needle comprises a puncture needle tube and a puncture needle handle; the pushing device comprises a pushing handle and a pushing rod, and the pushing rod is of a hollow structure; the positioning device comprises an anchor hook and a positioning line, the anchor hook is fixedly connected with the far end of the positioning line, the anchor hook is pre-loaded in an inner cavity of the puncture needle tube, the positioning line is pre-loaded in an inner cavity of the pushing rod, the positioning line is composed of a near-end part and a far-end part, and the near-end part is fixedly connected with the far-end part. The hardness of the far end part is higher than that of the near end part. The pulmonary nodule positioning needle can prevent the positioning lines from being stacked and the buckle from falling off, and is easy to disassemble.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a novel lung nodule positioning needle. Background Technology

[0002] Early-stage lung cancer, precancerous lesions, or suspected early-stage lung cancer nodules are often small and located deep within the lung tissue, making them difficult to locate during thoracoscopic surgery. CT-guided localization needles are currently the mainstream method for locating lung nodules, relying primarily on a hook at the tip of the needle to grip adjacent lung tissue for positioning. In existing techniques, a pusher mechanism within the nodule localization needle is typically used to extend the hook and release it within the patient's body to establish localization.

[0003] Existing lung nodule localization needles often use flexible silk sutures for positioning. Extensive research has revealed that surgeons often experience suture buildup at the anchor hook end within the needle lumen, leading to increased pushing resistance, jamming, and other defects. This can prevent the anchor hook from releasing and the needle from functioning properly. The main reasons for this are as follows: First, because the suture or positioning suture at the anchor hook end is flexible, surgeons may unintentionally or accidentally pull the device backward, exposing the flexible positioning suture in the needle lumen. When the device is pushed further, this exposed portion bends and becomes blocked, causing the anchor hook to jam and become unusable. Second, the existing locking design of lung nodule localization needles is prone to detachment during transport and surgery. This defect can cause the pusher to disengage from the latch limit, resulting in it falling off during transport or before the anchor hook is released during surgery. If the pusher moves backward, it can cause the traction line or positioning line to accumulate, leading to the series of problems mentioned above. Summary of the Invention

[0004] To address the aforementioned deficiencies and technical problems, this utility model designs a novel lung nodule positioning needle. This lung nodule positioning needle can prevent the accumulation of positioning lines, prevent the buckle from falling off, and is easy to disassemble. It can solve the problem caused by the unexpected retraction of the lung nodule positioning needle's pushing device, so that even if the surgeon performs an unconscious / misoperational pulling action, the anchor hook in the lung nodule positioning needle can still be released normally.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is:

[0006] A novel lung nodule localization needle includes a puncture needle, a pushing device, and a positioning device. The puncture needle includes a puncture needle tube and a puncture needle handle. The pushing device includes a pushing handle and a pushing rod, the pushing rod being a hollow structure. The positioning device includes an anchor hook and a positioning line, the distal ends of the anchor hook and the positioning line being fixedly connected. The anchor hook is pre-loaded in the inner cavity of the puncture needle tube, and the positioning line is pre-loaded in the inner cavity of the pushing rod. The positioning line consists of a proximal portion and a distal portion, the distal portion having a higher hardness than the proximal portion.

[0007] This utility model can also be further realized through the following technical solutions:

[0008] In one alternative implementation, the distal portion of the positioning line is supportive, and the proximal portion of the positioning line is divided into a non-supportive flexible line.

[0009] In one alternative implementation, the length of the distal portion of the positioning line is less than the length of the proximal portion.

[0010] In a preferred embodiment, the positioning line is an integral structure.

[0011] In a preferred embodiment, the distal portion and the proximal portion of the positioning line are fixedly connected.

[0012] In one optional embodiment, the main body of the positioning line is a homogeneous flexible line, and a polymer tube is provided at the distal end of the positioning line. The polymer tube and the main body of the positioning line are connected together by heat shrink welding or adhesive bonding, so that the hardness of the distal end of the positioning line is higher than that of the proximal end.

[0013] In an optional embodiment, the lung nodule positioning needle further includes a latch, the puncture needle and the pushing device are limited by the latch, a groove is provided on the latch, and a thread is provided at the proximal end of the puncture needle handle of the puncture needle, the thread being rotatably engaged with the groove.

[0014] In a preferred embodiment, a limit baffle and a positioning plate are further provided on the buckle. The limit baffle is located on the proximal side of the groove to limit the rotational movement range of the thread and the groove. The positioning plate is located on the proximal part of the buckle and has an arch bridge-shaped structure. It is interference-fitted with the push handle to limit the position of the push device and prevent the push device from being displaced.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The positioning wire of this utility model consists of two parts: the distal end of the positioning wire is supportive, and the proximal end of the positioning wire is divided into a flexible wire without support. This structural design differs from the rigid stainless steel or nickel-titanium wires used in the prior art, and also from the ultra-flexible polymer material wires used in the prior art. The support provided by the certain rigidity of the distal end of this structure can prevent the positioning wire from accumulating, and the flexible design of the proximal end facilitates placement. Therefore, the tail wire left on the body surface or in the chest cavity remains flexible and will not cause discomfort to the patient.

[0017] 2. The lung nodule positioning needle of this utility model is equipped with a buckle, which is different from the buckle of the limiting puncture needle and the pushing device in the prior art, which is directly fastened. The buckle of this utility model is threadedly connected to the puncture needle, and a limiting baffle is also provided on the buckle. The limiting baffle can limit the rotational movement range of the thread and the groove, restricting the movement of the spiral within the area of ​​the groove. Moreover, the buckle can only be removed by manual rotation. Compared with the prior art, it is more stable and reliable, not easy to fall off, and easy to disassemble. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the stacked positioning wires of a lung nodule positioning needle in the prior art.

[0019] Figure 2 This is a schematic diagram of the overall structure of the lung nodule positioning needle of this utility model.

[0020] Figure 3a This is a schematic diagram of one embodiment of the positioning device for the lung nodule positioning needle of this utility model.

[0021] Figure 3b This is a schematic diagram of another embodiment of the positioning device for the lung nodule positioning needle of this utility model.

[0022] Figure 4 This is a schematic diagram of the pushing device for the lung nodule positioning needle of this utility model.

[0023] Figure 5 This is a schematic diagram of the puncture needle of the lung nodule localization needle of this utility model.

[0024] Figure 6a and Figure 6b This is a schematic diagram of the buckle structure of the lung nodule positioning needle of this utility model.

[0025] Figure 7 This is a schematic diagram of the assembly of the puncture needle and the buckle of the lung nodule positioning needle of this utility model. Detailed Implementation

[0026] The technical solution of this application and the advantages therefrom are further described in detail below with reference to the accompanying drawings and specific embodiments. Note that the components in the drawings are not necessarily drawn to scale; their purpose is to illustrate the concept of this application.

[0027] The term "proximal end" as used in this application refers to the end closer to the surgical operator, while the term "distal end" as used in this application refers to the end farther away from the surgical operator.

[0028] Example 1

[0029] like Figure 2 As shown, a novel lung nodule localization needle includes a puncture needle 1, a pushing device 3, and a positioning device 4, as follows: Figure 5 As shown, the puncture needle 1 includes a puncture needle tube 11 and a puncture needle handle 12; as Figure 4 As shown, the pushing device 3 includes a pushing handle 32 and a pushing rod 31, wherein the pushing rod 31 has a hollow structure; as Figure 3a As shown, the positioning device 4 includes an anchor hook 41 and a positioning line 42. The distal ends of the anchor hook 41 and the positioning line 42 are fixedly connected. The anchor hook 42 is pre-loaded in the inner cavity of the puncture needle tube 11, and the positioning line 42 is pre-loaded in the inner cavity of the push rod 31. The positioning line 42 consists of a distal portion 421 and a proximal portion 422, with the distal portion 421 having a higher hardness than the proximal portion 422. In an optional embodiment, the distal portion 421 of the positioning line 42 has a supporting function, while the proximal portion 422 of the positioning line 42 is a flexible line without a supporting function. In one embodiment, the distal portion 421 is made of a high-molecular-weight monofilament, such as nylon or polypropylene, which combines flexibility and hardness; the proximal portion 422 uses a lower-hardness line, such as braided polyethylene, polyester, or PTFE. The distal portion 421 and the proximal portion 422 of the positioning line 42 are fixedly connected by means of adhesive bonding, fusion bonding or other methods.

[0030] Existing lung nodule positioning needles use highly flexible braided threads, such as braided polyethylene, braided polyester, or braided PTFE threads. These threads lack inherent strength and rigidity, easily bending and deforming under slight force. Therefore, if a doctor unintentionally misoperates the pusher before releasing the positioning needle, causing it to retract or move backward, these positioning threads can easily accumulate on the inner wall of the needle tube. The positioning threads of this invention have different rigidities; the distal portion 421 of the positioning thread 42 is harder than the proximal portion 422. This design ensures that even if the pusher retracts due to the doctor's misoperation, the distal portion 421 of the detached traction thread 42, due to its rigidity, provides support and prevents accumulation, reducing the risk of accumulation. In an optional embodiment, the length of the distal portion 421 of the positioning thread 42 is shorter than the length of the proximal portion 422. Because the hardness of the proximal portion 422 is much less than that of the distal portion 421, the tail suture left on the body surface or in the thoracic cavity remains flexible and will not cause discomfort to the patient.

[0031] Example 2

[0032] like Figure 2 As shown, a novel lung nodule localization needle includes a puncture needle 1, a latch 2, a pushing device 3, and a positioning device 4. The puncture needle 1 and the pushing device 3 are limited by the latch 2, as shown. Figure 5 As shown, the puncture needle 1 includes a puncture needle tube 11 and a puncture needle handle 12; as Figure 4 As shown, the pushing device 3 includes a pushing handle 32 and a pushing rod 31, wherein the pushing rod 31 has a hollow structure; as Figure 3b As shown, the positioning device 4 includes an anchor hook 41 and a positioning line 42. The distal ends of the anchor hook 41 and the positioning line 42 are fixedly connected. The anchor hook 42 is pre-loaded in the inner cavity of the puncture needle tube 11, and the positioning line 42 is pre-loaded in the inner cavity of the push rod 31. The positioning line 42 consists of a distal portion 421 and a proximal portion 422, and the hardness of the distal portion 421 is higher than that of the proximal portion 422. Figure 5 and Figure 6a As shown, a groove 21 is provided on the buckle 2, and a thread 121 is provided at the proximal end of the puncture needle handle 12 of the puncture needle 1, such as... Figure 7 As shown, the thread 121 is rotatably connected to the groove 21. The positioning line 42 is an integral structure, as shown... Figure 3bAs shown, the main body of the positioning line 42 is a homogeneous, low-hardness flexible thread. A polymer tube 423 is disposed on the distal portion 422 of the positioning line 42. The polymer tube 423 and the main body of the positioning line 42 are connected together by heat-shrink welding or bonding, so that the hardness of the distal portion 422 of the positioning line 42 is higher than that of the proximal portion 421. The main body of the positioning line 42 is preferably a braided polyethylene thread, polyester thread, PTFE thread, etc. The polymer tube 423 is preferably a polypropylene tube, nylon tube, etc.

[0033] In one implementation, such as Figure 6b As shown, a limiting baffle 22 and a positioning plate 23 are also provided on the buckle 2. The limiting baffle is located on the proximal side of the groove 21 to limit the rotational movement range of the thread and the groove. The positioning plate 23 is located on the proximal part of the buckle 2 and has an arched structure. The positioning plate 23 is interference-fitted with the push handle 32 to limit the position of the push device 3 and prevent the push device 3 from shifting. In the prior art, the buckles that limit the position of the puncture needle and the push device are directly fastened together. Therefore, they are prone to falling off before transportation and surgery, causing the push device to move backward, which in turn leads to problems such as the accumulation of positioning lines, push jamming, and the inability to use the puncture positioning needle. This invention differs from existing technologies in that the buckle is threadedly connected to the puncture needle, and a limit baffle and a positioning plate are also provided on the buckle. The limit baffle can restrict the rotational movement range of the thread and the groove, limiting the movement of the spiral within the groove area. The positioning plate can fix the pushing device, and the buckle can only be removed by manual rotation. Compared with existing technologies, it is more stable and reliable, not easy to fall off, and easy to disassemble.

[0034] The present utility model has been described in detail above, with the aim of enabling those skilled in the art to understand its contents and implement it. However, this description should not be construed as limiting the scope of protection of the present utility model. All equivalent changes or modifications made in accordance with the spirit and essence of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A novel lung nodule localization needle, comprising a puncture needle, a pushing device, and a positioning device, wherein the puncture needle includes a puncture needle tube and a puncture needle handle; the pushing device includes a pushing handle and a pushing rod, the pushing rod being a hollow structure; the positioning device includes an anchor hook and a positioning line, the distal ends of the anchor hook and the positioning line being fixedly connected, the anchor hook being pre-loaded in the inner cavity of the puncture needle tube, and the positioning line being pre-loaded in the inner cavity of the pushing rod, characterized in that, The positioning line consists of a proximal portion and a distal portion, wherein the hardness of the distal portion is higher than that of the proximal portion.

2. The lung nodule locating needle according to claim 1, characterized in that, The distal portion of the positioning line is supportive, while the proximal portion of the positioning line is divided into a non-supportive flexible line.

3. The lung nodule locating needle according to claim 1, characterized in that, The length of the distal portion of the positioning line is less than the length of the proximal portion.

4. The lung nodule locating needle according to claim 1, characterized in that, The positioning line is an integral structure.

5. The lung nodule locating needle according to claim 4, characterized in that, The main body of the positioning line is a homogeneous flexible line, and a polymer tube is provided at the distal end of the positioning line. The polymer tube and the main body of the positioning line are connected together by heat shrink welding or adhesive bonding, so that the hardness of the distal end of the positioning line is higher than that of the proximal end.

6. The lung nodule locating needle according to claim 1, characterized in that, The distal and proximal portions of the positioning line are fixedly connected.

7. The lung nodule locating needle according to claim 1, characterized in that, The lung nodule positioning needle also includes a buckle, the puncture needle and the pushing device are limited by the buckle, a groove is provided on the buckle, and a thread is provided at the proximal end of the puncture needle handle of the puncture needle, the thread being rotatably engaged with the groove.

8. The lung nodule locating needle according to claim 7, characterized in that, The buckle is also provided with a limit baffle and a positioning plate. The limit baffle is located on the proximal end side of the groove, and the positioning plate is located on the proximal end part of the buckle. The positioning plate has an arch bridge-shaped structure and is interference-fitted with the push handle.

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