CN116269832A - A High Visibility Pulmonary Nodule Locating Needle - Google Patents

Abstract

The invention relates to a high-visibility lung nodule positioning needle, which is provided with a positioning hook, a pushing rod and a puncture needle from inside to outside; the head of the puncture needle is provided with a puncture part, and the tail of the puncture needle is fixedly connected with an auxiliary ring; the tail part of the pushing rod is fixedly connected with a pushing handle; the push handle is provided with an opening; the positioning hook comprises a line segment part and an anchor segment part, and the diameter of the anchor segment part is larger than that of the line segment part; the line segment part and the anchor segment part are of an integral connection structure, and one end of the line segment part and the anchor segment part are in smooth transition; the line segment part is positioned in the pushing rod through the opening, and the front end of the anchor segment part exposed out of the pushing rod is positioned in the puncture needle; the pushing rod moves downwards to push out the anchor section part outside the puncture needle. The positioning hook adopts a single-wire diameter-changing design, so that the connection strength of the anchor part and the wire part can be improved, and the occurrence of the condition that the anchor is separated from the wire is reduced; meanwhile, the whole course of the positioning hook is a metal wire, so that the whole course of development under X-rays or CT can be realized, and convenience is brought to positioning accuracy judgment and intra-operative exploration.

Description

A High Visibility Pulmonary Nodule Locating Needle

technical field

The invention relates to the technical field of medical devices, in particular to a high-visibility pulmonary nodule locating needle.

Background technique

Pulmonary nodules are lesions with a diameter of no more than 3 cm in the lung, and lesions smaller than 10 mm are defined as small pulmonary nodules. Pulmonary nodules Due to the small size and few solid components of pulmonary nodules, it is difficult for doctors to determine the location of the lesion through touch and vision during surgical resection. In order to avoid excessive damage to normal lung tissue, the location of pulmonary nodules is often marked under the guidance of preoperative CT to improve surgical efficiency and reduce damage to normal lung tissue. The existing pulmonary nodule labeling methods are as follows:

Percutaneous lung puncture with dyeing agent: the method of use is to insert the puncture needle into the lung tissue under the guidance of CT and reach the location of the pulmonary nodule, inject the dye, use the dye to stain the lung tissue, and then pull out the puncture needle. The location of the pulmonary nodule can be demarcated in the subsequent operation. The disadvantages of this method are: the dye diffuses quickly and must be marked within a short time before the operation, otherwise the dye diffuses too much and loses the value of accurate labeling of pulmonary nodules; the existing clinically available dyes are highly irritating, The proportion of patients with pleural reaction and pain was high.

Percutaneous placement of a non-specific breast positioning hook through the lung: the same as the aforementioned spring coil method, the implant is a breast positioning hook. Because breast positioning does not pass through the chest cavity, even if the metal wire is very thick, it will not cause a large reaction in the patient. However, when positioning lung nodules, the metal wire will repeatedly involve the pleura during the patient's lung breathing movement, resulting in The patient's pain and other discomfort are more obvious. The disadvantages of this method are: strong irritation and obvious pain for patients; weak anchoring force and easy decoupling, which cannot meet the needs of pulmonary nodule positioning; the puncture system is too thick (not less than 20G), and the incidence of complications such as pneumothorax and bleeding is high; positioning After the hook is implanted, it can only be removed by surgery, and the minimally invasive removal of the positioning hook cannot be achieved for patients who consider temporarily canceling the surgery after implantation.

Percutaneous lung placement of coil-like lung nodule positioning hook: the method of use is to penetrate the puncture needle into the lung tissue and reach the location of the lung nodule under the guidance of CT, and then insert the front part of the coil into the pulmonary nodule through the puncture needle position, and place the tail as far as possible in the pleural cavity during needle withdrawal. The disadvantages of this method are: the texture of the coil is still soft, and the tactile improvement is limited; the anchoring force of the coil is weak, and it is easy to fall off; the puncture system is too thick (not less than 20G), and the incidence of complications such as pneumothorax and bleeding is high; the positioning hook After implantation, it can only be taken out by surgical operation, and the minimally invasive removal of the positioning hook cannot be realized for patients who consider temporarily canceling the surgical operation after implantation.

Percutaneous placement of anchor-type pulmonary nodule positioning needle through the lung: the same as the aforementioned coil method, the implant is a special locator for pulmonary nodules. The silk thread remains in the pleural cavity or chest wall. During the operation, the doctor can judge the location of the nodule by observing the position of the tail thread and pulling the anchor thread. The disadvantages of this method are: the polymer wire does not develop under CT, and it is difficult to find it through CT or X-ray after decoupling; the puncture system is too thick (not less than 20G), and the incidence of complications such as pneumothorax and bleeding is high; It needs to be connected through a connecting mechanism, and it is easy to separate and disconnect the thread (once the thread is disconnected during the operation, the anchor can only be removed by surgical exploration by means of X-ray or CT positioning, while the anchor thread cannot be seen by X-ray, and the foreign body can only be detected by repeated rummaging. After the positioning hook is implanted, it can only be removed by surgery, and the minimally invasive removal of the positioning hook cannot be achieved for patients who consider temporarily canceling the surgery after implantation.

Contents of the invention

In order to solve the deficiencies of the prior art, the present invention proposes a high-visibility pulmonary nodule locating needle. By designing the core structure locating hook as a structure with a single-wire variable diameter, compared with the previous locating methods, the whole process of locating hook can be reduced. The maximum diameter allows the positioning needle to be placed into a thinner puncture needle, which can reduce the incidence of surgical complications such as pneumothorax and bleeding; it can improve the connection strength between the anchor part and the thread part, and reduce the occurrence of the anchor and thread detachment; the positioning hook The whole process is made of metal wire, which can realize the whole process of imaging under X-ray or CT, and provides convenience for the determination of positioning accuracy and intraoperative exploration; the diameter of the wire segment is thinner, the rigidity is reduced, and the flexibility is increased, which can reduce the patient’s pain and pleura due to metal foreign bodies Discomfort such as reactions; after the positioning hook is implanted, because the tail end is a metal monofilament with a smooth transition with the anchor segment, the metal wire at the tail end of the positioning hook can be used as a support, and the puncture needle is re-implanted and the positioning hook is pulled back into the lung for puncture The inner cavity of the needle realizes the minimally invasive recovery of the positioning hook.

For realizing the above object, the technical scheme adopted in the present invention comprises:

A high-visibility pulmonary nodule positioning needle, comprising: the positioning needle is provided with a positioning hook, a push rod and a puncture needle from the inside to the outside;

The head of the puncture needle is provided with a puncture part, and the tail is fixedly connected with an auxiliary ring;

The tail of the push rod is fixedly connected with a push handle;

The push handle is provided with an opening;

The positioning hook includes a line segment and an anchor segment, and the diameter of the anchor segment is larger than the diameter of the line segment;

The line section and the anchor section are integrally connected, and one end of the line section is smoothly transitioned to the anchor section;

The wire segment is located inside the push rod through the opening, and the anchor segment exposed at the front end of the push rod is located inside the puncture needle;

The pushing rod moves downwards to push out the anchor section to the outside of the puncture needle.

Further, the puncture needle is made of metal.

Further, the material of the positioning hook is a memory metal wire.

Further, the diameter interval of the line section is 0.05-0.67mm; the diameter interval of the anchor section is 0.15-1.50mm.

Further, the shape of the anchor section includes a helical spring shape.

The beneficial effects of the present invention are:

In the present invention, the positioning hook of the core structure is designed as a single-wire diameter-changing structure. Compared with the previous positioning method, the maximum diameter of the positioning hook in the whole process can be reduced, so that the positioning needle can be placed into a thinner puncture needle, which can reduce pneumothorax, bleeding, etc. The incidence of surgical complications; the connection strength between the anchor part and the line part can be improved, and the occurrence of the anchor and line detachment can be reduced; the whole positioning hook is made of metal wire, which can realize the whole process of development under X-ray or CT, which is used for positioning accuracy judgment and It provides convenience for intraoperative exploration; the wire diameter becomes thinner, the rigidity is reduced, and the flexibility is increased, which can reduce the patient's pain and pleural reaction to the metal foreign body. Metal monofilament, the metal wire at the tail end of the positioning hook can be used as a support, and the puncture needle is implanted again and the positioning hook is pulled back into the inner cavity of the puncture needle in the lung, so as to realize the minimally invasive recovery of the positioning hook.

Description of drawings

Fig. 1 is a front view of the structure of the highly visible pulmonary nodule locating needle in the preferred embodiment of the present invention when it is not pushed out.

Fig. 2 is a side view of the structure of the highly visible pulmonary nodule locating needle in the preferred embodiment of the present invention when it is not pushed out.

Fig. 3 is a front view of the structure of the high-visibility pulmonary nodule locating needle in the push-out state of the preferred embodiment of the present invention.

Fig. 4 is a side view of the structure of the high-visibility pulmonary nodule locating needle in the push-out state of the preferred embodiment of the present invention.

Fig. 5 is a front view of the positioning hook structure of the preferred embodiment of the present invention.

Fig. 6 is a side view of the positioning hook structure of the preferred embodiment of the present invention.

Description of the accompanying drawings: 1 positioning hook, 1-1 line segment, 1-2 anchor segment, 2 push rod, 2-1 push handle, 2-2 opening, 3 puncture needle, 3-1 puncture part, 3- 2 auxiliary circles.

Detailed ways

In order to understand the content of the present invention more clearly, it will be described in detail with reference to the drawings and embodiments.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the invention. and simplified descriptions, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.

The terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be fixed connection, detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct It can also be connected indirectly through an intermediary, or it can be the internal communication of two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention based on specific situations.

The present invention relates to a high-visibility pulmonary nodule locating needle shown in Fig. 1 to Fig. 6, the locating needle is provided with a locating hook 1, a push rod 2 and a puncture needle 3 from inside to outside;

The head of the puncture needle 3 is provided with a puncture part 3-1, and the tail is fixedly connected with an auxiliary ring 3-2;

The tail of the push rod 2 is fixedly connected with a push handle 2-1;

The push handle 2-1 is provided with an opening 2-2;

The positioning hook 1 includes a line section 1-1 and an anchor section 1-2, and the diameter of the anchor section 1-2 is larger than the diameter of the line section 1-1;

The line section 1-1 and the anchor section 1-2 are integrally connected, and one end of the line section 1-1 is smoothly transitioned to the anchor section 1-2;

The line section 1-1 is located inside the push rod through the opening 2-2, and the anchor section 1-2 is exposed at the front end of the push rod 2 and located inside the puncture needle 3;

The pushing rod 2 moves downwards, pushing out the anchor section 1-2 outside the puncture needle.

Specifically, in the embodiment of the present application, the puncture needle 3 is made of metal, and the outer diameter of the puncture needle 3 is 2.0-0.1 mm, preferably, the outer diameter is 0.8 mm and the inner diameter is 0.6 mm; the puncture needle 3 includes an auxiliary ring 3-2 has a length of 7.0-20.0 cm, preferably 12 cm.

The tail end of the puncture needle 3 and the push rod 2 is connected with an auxiliary ring 3-2 made of polymer material, which is easy to hold. The outer diameter of the push rod 2 is smaller than the inner diameter of the puncture needle 3, and the inner diameter of the push rod 2 is larger than the diameter of the line segment 1-1 of the positioning hook 1 and smaller than the diameter of the anchor segment 1-2 of the positioning hook 1, so the line segment 1-1 of the positioning hook 1 is located on the push rod 2, the anchor section 1-2 of the positioning hook 1 is located in the puncture needle 3 in front of the push rod 2 before being released.

The positioning hook is made of memory metal wire (such as nickel-titanium alloy wire). The anchor section is made of thick wire with a diameter of 0.15-1.50mm, preferably 0.30mm in diameter. The line section is made of thin wire with a diameter of 0.05-0.67mm , the preferred diameter is 0.12mm, with a smooth transition in the middle.

The shape of the anchor segment is changeable. This embodiment adopts a multi-row coil spring-like structure, and the diameter of the coiled spring is 4.0mm, and it can also be other shapes formed by a single wire. In order to ensure that the puncture needle will not mistakenly push the push rod 2 during the implantation process and cause the positioning hook 1 to be released by mistake, a detachable relative position clamping control should be installed at the end of the push rod 2 and the tail end of the puncture needle 3. device.

As shown in Figure 3 to Figure 4, after the positioning needle reaches the area where the pulmonary nodule is located under the guidance of CT, the positioning hook 1 can be pushed out and released into the lung tissue through the push rod 2, and the puncture needle 3 and the push rod can be pulled out 2. Keep the positioning hook segment 1-1 outside the lung. Realized 100% visualization of the positioning hook 1 (including the anchor segment and the line segment) under X-ray and CT; realized the use of variable diameter under the condition of maintaining the high anchoring force in the lung of the anchor segment. The high flexibility of the line segment is ensured; at the same time, the anchor section and the line section are processed by the same memory metal wire, so the connection strength is high, and it is not easy to separate and fall off the line. In addition, because the positioning hook is simple in structure and made of a single thread, it can be implanted with a thinner puncture needle, reducing puncture-related complications, and can achieve minimally invasive recovery of the positioning hook when necessary.

As shown in Figures 5 to 6, the positioning hook 1 of the core structure of the present invention adopts the design of single-wire variable diameter, which can reduce the maximum diameter of the positioning hook in the whole process compared with the previous positioning method, so that the positioning needle can be put into a thinner puncture needle , can reduce the incidence of surgical complications such as pneumothorax and bleeding; (it can increase the connection strength between the anchor part and the line part, and reduce the occurrence of the anchor and line detachment; the whole positioning hook is a metal wire, which can realize the whole process under X-ray or CT Development provides convenience for the determination of positioning accuracy and intraoperative exploration; the diameter of the line segment is thinner, the rigidity is reduced, and the flexibility is increased, which can reduce the patient's pain and pleural reaction to the metal foreign body. The end is a metal monofilament with a smooth transition to the anchor segment, and the metal wire at the end of the positioning hook can be used as a support. The puncture needle is implanted again and the positioning hook is pulled back into the inner cavity of the puncture needle in the lung to realize minimally invasive recovery of the positioning hook. .

Claims (5)

1. A high-visibility pulmonary nodule locating needle is characterized in that, comprising: the locating needle is provided with a locating hook, a push rod and a puncture needle from the inside to the outside; The head of the puncture needle is provided with a puncture part, and the tail is fixedly connected with an auxiliary ring; The tail of the push rod is fixedly connected with a push handle; The push handle is provided with an opening; The positioning hook includes a line segment and an anchor segment, and the diameter of the anchor segment is larger than the diameter of the line segment; The line section and the anchor section are integrally connected, and one end of the line section is smoothly transitioned to the anchor section; The wire segment is located inside the push rod through the opening, and the anchor segment exposed at the front end of the push rod is located inside the puncture needle; The pushing rod moves downwards to push out the anchor section to the outside of the puncture needle. 2. The positioning needle according to claim 1, wherein the puncture needle is made of metal. 3. The positioning needle according to claim 2, wherein the material of the positioning hook is memory metal wire. 4 . The positioning needle according to claim 3 , wherein, the diameter interval of the line segment is 0.05-0.67 mm; the diameter interval of the anchor segment is 0.15-1.50 mm. 5. The positioning needle according to any one of claims 1 to 4, characterized in that, the shape of the anchor section comprises a coil spring shape.

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