CN215306501U - Puncture positioning needle - Google Patents

Abstract

The utility model provides a puncture positioning needle tool, wherein a positioner (2) is positioned in a needle sheath (1) and comprises a head end (21) and an anchoring piece (22), the anchoring piece (22) is close to a first port (11) of the needle sheath (1) and elastically contracts in the needle sheath (1), one end of a silk thread (3) is connected with the head end (21), the other end of the silk thread extends to the outer side of a second port (12) of the needle sheath (1), the front end of a push rod (4) is positioned in the needle sheath (1), the rear end of the push rod extends to the outer side of the second port (12), a thread cutter (5) is arranged on the outer side surface of the push rod (4), and the thread cutter (5) can be close to the position, positioned on the outer side of the front end of the push rod (4), of the silk thread (3) and cut off the silk thread. The positioning needle tool is utilized for positioning, the cutting of the silk thread is completed in the body, and the release of the positioner and the cutting of the silk thread can be realized without repeatedly inserting the push rod. Meanwhile, the surface of the positioner and the silk thread are coated with fluorescent materials, so that the positioner and the silk thread are easier to find compared with a common positioner.

Description

Puncture positioning needle

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an in-vivo puncture positioning needle for preoperative lesions.

Background

Thoracoscopic surgery is widely applied to excision of lesions such as pulmonary nodules due to small wound and high safety, but the pulmonary lesions are small in size, so that accurate positioning can not be performed in the operation through means such as direct-view observation and finger palpation of an operator, and accurate positioning is generally required before the operation. There are many methods for localization, such as preoperative contrast agent or dye injection, use of Hookwire, micro-spring coil under CT guidance, and intraoperative localization methods using ultrasound. Wherein, the Hookwire is a steel wire with a hook, the head end of the Hookwire is fixed at the focus in the lung or in the lung tissue close to the focus in the lung in a hook shape, and the steel wire at the other end is positioned on the body surface. Hookwire positioning is applied to breast positioning at the earliest time, and is applied to lung lesion positioning along with the development of a thoracoscope operation technology, and the defects of positioning failure caused by easy unhooking and complications such as pneumothorax, pain and the like are caused. The microcoil positioning is obviously superior to Hookwire in the aspect of unhooking prevention, has higher positioning success rate and better stability, and becomes the main trend of positioning lesions in the lung. One end of the microcoil is placed near the lesion in the lung, and the other end is left on the surface of the lung or outside the visceral pleura. Because all the spring rings bring certain difficulty to the implantation operation, and the longer spring rings can cause certain tissue damage, some researchers replace part of the spring rings with silk threads, and the spring rings at one end and the silk threads at the other end are positioned, so that the positioning difficulty can be reduced, and the tissue damage is reduced. On one hand, the length of the silk thread cannot be accurately controlled, and if the silk thread with a specific length specification is adopted, during positioning, due to the fact that the position of a focus from a body surface is difficult to accurately calculate and uncertain factors of positioning operation are caused, the situation that the length of the silk thread is insufficient can be caused, and therefore the positioning cannot meet the requirement; if a mode of storing sufficient silk threads is adopted, during positioning operation, the puncture needle is firstly punctured to the position near a focus, the spring ring in the needle sheath is pushed out of the sheath by the push rod to release positioning, the needle sheath is withdrawn for a certain distance, the push rod is completely withdrawn, redundant silk threads are cut on the body surface, the push rod is inserted into the needle sheath to push the silk threads to the outside of the needle sheath to release the silk threads, and finally the push rod and the puncture needle are withdrawn. On the other hand, after the positioner in the prior art is positioned, the positioner is often touched by hands to determine the position of the positioner during the thoracoscopic surgery, so that the excision of the focus is performed, and the touch determination mode is obviously low in accuracy, and brings certain influence on the operation result.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, the present invention provides a puncture positioning needle set, which is used for solving the problems of infection risk and complicated operation caused by cutting a silk thread outside the body and repeatedly inserting a push rod for pushing operation during the positioning operation of the positioner in the prior art, and the problems of difficulty and unsafe factors caused by the positioning operation caused by the complicated operation, and also for solving the problem of adverse effect of the operation caused by the need of determining the position by touching after the focus is positioned by the positioner in the prior art.

In order to achieve the above and other related objects, the present invention provides a puncture needle device, comprising: a needle sheath, a positioner, a silk thread, a push rod and a thread cutter, wherein the needle sheath is a hollow structure with two open ends, the locator is positioned in the needle sheath and comprises a head end and an anchoring piece connected with the head end, the anchoring piece is close to the first port of the needle sheath, and elastically contracts in the needle sheath, the first port is a puncture end, one end of the silk thread is connected with the head end, the other end of the silk thread extends to the outer side of the second port of the needle sheath, the front end of the push rod is positioned in the needle sheath, close to the head end, the rear end extends to the outer side of the second port of the needle sheath, after the positioner is pushed out of the first port of the needle sheath by the push rod, the anchoring element is elastically released and anchored in the target tissue, the filament is positioned outside the push rod, and extends along the length direction of the push rod, the thread cutting knife is arranged on the outer side surface of the push rod, the thread cutter can be close to the part of the silk thread, which is positioned on the outer side of the front end of the push rod, and cut off the silk thread.

Furthermore, the anchoring element is composed of at least one elastic filament, the elastic filament is elastically contracted in the needle sheath after being processed and shaped in at least one of bending, winding and weaving modes, and the head end is the end part of the elastic filament or a structure formed by fixedly connecting a block structure and the end part of the elastic filament; the silk thread is made of flexible fiber materials, and the positioner and the silk thread are coated with fluorescent materials.

Furthermore, the side of the needle sheath is marked with scales, the positioning needle further comprises a buckle, a clamping interface is arranged on the buckle, and the clamping interface can be clamped on the outer side surface, located outside the second port of the needle sheath, of the push rod and abutted against the end surface of the second port.

Furthermore, one end of the thread cutting knife is fixedly connected to the outer side face of the front end of the push rod, the side face of the thread cutting knife is of a knife edge structure, and when the push rod rotates, the knife edge of the thread cutting knife is close to the position, located on the outer side of the front end of the push rod, of the silk thread and cuts the silk thread.

Furthermore, the push rod comprises a rod core and a conveying piece, the front end of the rod core is positioned in the needle sheath and is close to the head end of the positioner, the rear end of the rod core extends to the outer side of the second port of the needle sheath, a bulge extending along the circumferential direction of the rod core is arranged on the outer side surface of the rod core positioned outside the second port of the needle sheath, a groove which is clamped with the bulge and can move along the circumferential direction relative to the bulge is arranged on the conveying piece, the rear end of the rod core is positioned on the rear side of the bulge, the rear end of the conveying piece is positioned on the rear side of the bulge, the front end of the conveying piece is positioned on the front side of the bulge and extends to the outer side of the front end of the rod core in the needle sheath along the length direction of the rod core and is attached to the outer side surface of the rod core, one end of the thread cutter is fixedly connected on the outer side surface of the front end of the conveying piece, the side surface of the thread cutter is of a blade structure, and pushes the conveying piece to move along the circumferential direction of the bulge, so that the thread cutter approaches to the part of the thread which is positioned outside the front end of the push rod and cuts the thread.

Furthermore, the part of the conveying piece, which is located on the front side of the protrusion, is a circular sleeve and is sleeved on the outer side surface of the rod core, or the part of the conveying piece, which is located on the front side of the protrusion, is an arc-shaped sleeve and is sleeved on the outer side surface of the rod core, or the part of the conveying piece, which is located on the front side of the protrusion, is a rod-shaped structure.

Further, when the part of conveying piece that is located bellied front side is arc sleeve or shaft-like structure, conveying piece, secant sword are two, and every conveying is last to install a secant sword, and two conveying pieces are located respectively the both sides of silk thread promote two conveying pieces all follow bellied circumferencial direction removes for two secant knives are all close to the same position that is located the front end outside of push rod of silk thread and cut off it.

Furthermore, the push rod is also provided with a wire storage bin for storing silk threads, the wire storage bin is positioned on the outer side of the second port of the needle sheath, and a wire outlet hole is formed in the side surface of the wire storage bin.

Furthermore, adjacent locking cavities and wire storage cavities are formed in the wire storage bin, wire outlet holes are formed in the side faces of the locking cavities, wire inlet holes are formed in the side faces or the bottom face of the locking cavities and communicated with the wire storage cavities, the wire storage cavities are used for storing silk threads, the silk threads penetrate through the wire inlet holes and the wire outlet holes and can move in the locking cavities attached to the bottom faces of the locking cavities, openings are formed in the upper end faces of the locking cavities, locking columns capable of moving in the up-down direction are sleeved through the openings, and when the locking columns move downwards, the portions, penetrating through the silk threads, in the locking cavities are pressed and fixed.

Furthermore, adjacent locking cavities and wire storage cavities are formed in the wire storage bin, wire outlet holes are formed in the side faces of the locking cavities, wire inlet holes are formed in the side faces of the locking cavities and communicated with the wire storage cavities, the longitudinal positions of the wire inlet holes are higher than those of the wire outlet holes, the wire storage cavities are used for storing silk threads, openings are formed in the upper end faces of the locking cavities, locking columns capable of being tightly attached to the inner side faces of the locking cavities where the wire inlet holes are located are sleeved through the openings, locking holes which are transversely communicated are formed in the locking columns, the silk threads penetrate through the wire inlet holes, the locking holes and the wire outlet holes and can move in the locking cavities, and when the locking columns are tightly attached to the inner side faces of the locking cavities where the wire inlet holes are located and move downwards, the wire inlet holes and the locking holes are staggered, so that the silk threads are clamped.

As described above, the puncture positioning needle device of the present invention has the following beneficial effects: according to the positioning needle tool, the positioner is connected with the silk thread, the positioner is positioned at the puncture end of the needle sheath, the front end of the push rod is close to the positioner, the silk thread is positioned on the outer side of the push rod, and the outer side surface of the push rod is provided with the thread cutter for cutting off the silk thread; in the positioning operation, after the needle sheath is punctured to the position near the focus, the positioner is pushed out of the puncturing end by the push rod to be released and positioned near the focus, the needle sheath is withdrawn to enable the front end of the push rod to be positioned at a preset position, such as the surface of a lung or the outside of a visceral pleura, and the like, the silk thread is fixed, the silk thread is cut by the thread cutter, and the needle sheath is withdrawn to be completely withdrawn. The positioning needle tool is utilized to position, the cutting of the silk thread is completed in vivo, the pushing of the push rod, the releasing of the positioner, the cutting of the silk thread and the releasing of the silk thread are successively operated in one step, the push rod does not need to be repeatedly inserted, and the problems of infection risks caused by the problems that the silk thread needs to be cut outside the body and the push rod needs to be repeatedly inserted to perform pushing operation when the positioner in the prior art is used for positioning operation and the difficulty and the unsafe factors of positioning operation are increased by complicated operation are solved. And the surface of the locator and the silk thread are coated with fluorescent materials, so that the extending path of the silk thread and the position of the locator can be clearly observed under a thoracoscope during the thoracoscope operation, and the locator and the silk thread are easier to find compared with a common locator and the silk thread in the prior art, thereby providing an exact focus position for the operation, and solving the problem that the locator in the prior art needs to determine the position through touch after the focus is positioned to bring adverse effects to the operation. The utility model has wide clinical application prospect.

Drawings

FIG. 1 shows a longitudinal cross-sectional view of a needle device of the puncture positioning needle device of the present invention in one embodiment.

Fig. 2-1 to 2-10 are schematic views showing the structure of the positioning device of the puncture positioning needle tool of the present invention.

Fig. 3 is a schematic view of the positioning position of the puncture positioning needle of the present invention.

FIG. 4 shows a longitudinal cross-sectional view of a needle device of the puncture positioning needle device of the present invention in yet another embodiment.

FIG. 5 is a schematic view of the structure of the protrusion and the groove of the lancing device of the present invention.

FIG. 6 is a front view of the plunger of the lancing positioning needle according to one embodiment of the present invention.

FIG. 7 is a left side view of the plunger of the lancing positioning needle device of the present invention in a further embodiment.

FIG. 8 is a left side view of the plunger of the lancing positioning needle according to still another embodiment of the present invention.

Fig. 9-1 to 9-3 are schematic structural views of the buckle of the puncture positioning needle tool of the present invention.

Fig. 10 is a schematic structural view of a thread storage magazine of the puncture positioning needle device in an embodiment of the utility model.

FIG. 11 is a schematic structural view of a storage magazine of the puncture needle device of the present invention in another embodiment.

Fig. 12 is a schematic structural view of a storage magazine of the puncture needle device according to still another embodiment of the present invention.

Description of the element reference numerals

1 needle sheath

11 first port

12 second port

13 graduation

2 locator

21 head end

22 anchoring element

3 filament yarn

4 push rod

41 pole core

42 conveyor

43 projection

44 groove

5 thread cutter

6 wire storage bin

61 wire outlet hole

62 locking cavity

63 wire storage cavity

64 wire inlet hole

65 locking column

66 locking hole

7 fastener

71 card interface

8 Lung disease

9 focus of infection

10 pleural cavity

11 chest wall

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

Please refer to fig. 1 to 12. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

As shown in fig. 1, the present invention provides a puncture positioning needle for positioning a lesion in a body before an operation, including: the needle sheath 1 is a hollow structure with two open ends, the locator 2 is positioned in the needle sheath 1 and comprises a head end 21 and an anchoring part 22 connected with the head end 21, the anchoring part 22 is close to a first port 11 of the needle sheath 1, the anchoring part 22 is elastically contracted in the needle sheath 1, the first port 11 is a puncture end, as shown in figure 1, the puncture end is an oblique needle point and is used for puncturing a preset position in a body, such as the vicinity of a lung lesion, one end of the silk thread 3 is connected with the head end 21, the other end of the silk thread extends to the outer side of a second port 12 of the needle sheath 1, the front end of the push rod 4 is positioned in the needle sheath 1 and is close to the head end 21 of the locator 2 and is used for pushing the locator 2, the rear end of the push rod extends to the outer side of the second port 12 of the needle sheath 1, after the locator 2 is pushed out of the first port 11 of the needle sheath 1 by the push rod 4, the anchoring part 22 is elastically released and anchored in target tissue, the silk thread 3 is positioned on the outer side of the push rod 4 and extends along the length direction of the push rod 4, the thread cutting knife 5 is arranged on the outer side surface of the push rod 4, the thread cutting knife 5 can cut the silk thread 3 by approaching the part of the silk thread 3 positioned on the outer side of the front end of the push rod 4, and the front end of the push rod 4 is positioned in the needle sheath 1 and is close to the puncture end, so that the internal cutting of the silk thread can be realized during puncture positioning.

The operation process of the positioning needle tool of the utility model is as follows: after the puncture tip of the needle instrument is punctured into a predetermined position in the body, such as the vicinity of a lung lesion, the push rod 4 is pushed, the positioner 2 is completely pushed out of the first port 11 of the needle sheath 1 by the push rod 4, the anchoring member 22 is elastically released and anchored in the target tissue (as shown in fig. 3), the needle sheath 1 is withdrawn for a certain distance, the push rod 4 positioned in the needle sheath 1 is also withdrawn along with the needle sheath 1, while the silk thread 3 is kept still because of the anchoring of the positioner 2, the silk thread 3 in the needle sheath 1 is gradually released out of the first port 11 along with the withdrawal of the needle sheath 1, the silk thread 3 outside the second port 12 of the needle sheath 1 gradually enters the needle sheath 1, the push rod 4 is withdrawn along with the needle sheath 1, and when the needle sheath 1 is withdrawn due to cutting off the part of the silk thread 3 positioned outside the front end of the push rod 4, when the front end of the push rod 4 is withdrawn to a predetermined position, such as the position outside the lung surface or visceral layer (as shown in fig. 3), fixing the portion of the wire 3 outside the second port 12 of the needle sheath 1, cutting off the portion of the wire 3 outside the forward end of the push rod 4 with the cutting blade 5, withdrawing the needle sheath 1 to a full withdrawal, with the withdrawal of the needle sheath 1, the portion of the wire 3 connected to the retainer 2 being released completely outside the first port 11 of the needle sheath 1, the cut end of the wire 3 being positioned at a predetermined location, for example, outside the pulmonary surface or visceral pleura (as shown in fig. 3). Therefore, the positioning needle tool can realize the cutting of the silk thread in vivo, and the push of the push rod, the release of the positioner, the cutting of the silk thread and the release of the silk thread are successively operated in one step without repeatedly inserting the push rod, thereby solving the problems of infection risk caused by the problems that the silk thread needs to be cut in vitro and the push rod needs to be repeatedly inserted for pushing operation when the positioner in the prior art is used for positioning operation, and the difficulty and unsafe factors caused by complicated operation for positioning operation.

The anchoring member 22 is formed of at least one elastic filament, which is elastically contracted in the needle sheath 1 after being processed and shaped in at least one of bending, winding and knitting. The elastic filament can be made of elastic metal material, such as memory alloy (e.g. nickel-titanium alloy, Ti-Nb alloy, Ni-Al alloy, etc.), chromium alloy, platinum-tungsten alloy, platinum, stainless steel, titanium, iridium, tungsten, palladium, etc.; the elastic filament body can also be made of a material formed by combining or compounding a metal material and a high polymer material, such as a material formed by combining or compounding metal and rubber or fiber; the polymer may be elastic, but is not limited thereto, and other materials that are elastic and meet medical requirements and meet anchoring objectives may be used.

The head end 21 of the positioner 2 is an end of an elastic filament or a structure formed by fixedly connecting a block structure and an end of an elastic filament, and the block structure can be made of the same material as the elastic filament. As shown in fig. 1, the anchoring member 22 is a spring coil formed by winding an elastic filament, which is bound in the needle sheath 1 in a contracted state, and has a tendency of spirally evolving in a free state after being released from the needle sheath 1, and is simultaneously subjected to the extrusion force of surrounding tissues so as to be anchored in the tissues, fig. 2-1 shows that the structure of the spring coil in the free state is a linear spiral, the head end 21 of the positioner 2 shown in fig. 1 is the end of the elastic filament, and in order to facilitate the pushing of the push rod 4, as shown in fig. 2-2, a block structure is fixedly connected to the end of the elastic filament, and the connected structure is the head end 21. As shown in fig. 2-1 to 2-10, the helical shape of the anchor member 22 in the free state after release may be not only a linear helical shape (fig. 2-1, fig. 2-2), but also a conch-type helical shape (fig. 2-3), a spherical helical shape (fig. 2-8), a disc-type helical shape (fig. 2-9), or the like, besides the spiral shape, the fabric can be bent into a hook shape (figures 2-4, figures 2-5) or a star shape (figures 2-6) or a wave shape (figures 2-7), and the like, can be woven into a net shape (figures 2-10), and the like, and can also be umbrella-shaped or tower-shaped or the like or irregular shapes, here, the shape is given by way of example only, and is not limited to the structure shown in the drawings, and may be other shape structures as long as they can be anchored in a predetermined tissue.

The silk thread 3 is made of flexible fiber material, such as medical flexible surgical thread, the material includes cotton, hemp, silk, nylon, terylene, polyethylene, polypropylene, animal fiber, etc., and may be other high polymer material with high biocompatibility, but not limited thereto, as long as it is a medical flexible material capable of realizing positioning operation.

The positioner 2 and the silk thread 3 are coated with fluorescent materials, so that the extending path of the silk thread and the position of the positioner can be clearly observed under a thoracoscope during a thoracoscope-assisted surgery, the positioner can be found more easily than a common positioner and the silk thread in the prior art, an exact focus position is provided for the surgery, and the problem that the positioner in the prior art needs to determine the position through touch after the focus is positioned to cause adverse effects to the surgery is solved. The fluorescent material is a medical material meeting safety standards, for example, indocyanine green (ICG), methylene blue, and the like, but is not limited thereto, and may be other fluorescent materials as long as the coating effect thereof can satisfy the use of medical positioning operation.

Preferably, as shown in fig. 4, the needle sheath 1 is marked with scales 13 on the side surface, so that the puncture depth, the push rod pushing distance, the withdrawing distance and the like can be measured quickly and accurately during puncture positioning, and the puncture positioning position can be controlled accurately. The scale 13 in fig. 4 is given by way of example only, and the specific design of the scale may be made as desired.

The needle sheath 1, the push rod 4 and the thread cutting knife 5 are made of medical materials, such as medical stainless steel, titanium alloy and the like, but are not limited to the above materials as long as the medical requirements are met.

In one embodiment, as shown in fig. 1, one end of the thread cutting knife 5 is fixedly connected to the outer side surface of the front end of the push rod 4, the side surface of the thread cutting knife is a blade structure, and when the push rod 4 rotates, the blade of the thread cutting knife 5 is close to the part of the thread 3, which is located on the outer side of the front end of the push rod 4, and cuts the thread.

In one embodiment, as shown in fig. 4-8, the push rod 4 comprises a core 41 and a transmission member 42, the core 41 has a front end located inside the needle sheath 1 and close to the head end 21 of the retainer 2, a rear end extending to the outside of the second port 12 of the needle sheath 1, a protrusion 43 extending along the circumferential direction of the core 41 is provided on the outer side of the needle sheath 1 outside the second port 12, a groove 44 engaged with the protrusion 43 and movable relative to the protrusion 43 along the circumferential direction is provided on the transmission member 42, as shown in fig. 5, the longitudinal cross-section of the protrusion 43 and the groove 44 is schematically shown in fig. 5, the rear end of the core 41 is located at the rear side of the protrusion 43, the rear end of the transmission member 42 is located at the rear side of the protrusion 43, the front end is located at the front side of the protrusion 43, and extends into the needle sheath 1 along the length direction of the core 41 to the outside of the core 41 and is attached to the outer side of the core 41, as exemplarily shown in fig. 4-8, the rear end surface of the transmitting member 42 may not be in contact with the outer surface of the rod core 41, or the rear end of the transmitting member 42 may extend in the rear end direction thereof by a distance in contact with the rod core 41, in addition to the rear end surface of the transmitting member 42 being in contact with the outer surface of the rod core 41. One end of the thread cutting knife 5 is fixedly connected to the outer side face of the front end of the conveying member 42, the side face of the thread cutting knife is of a blade structure, and the conveying member 42 is pushed to move along the circumferential direction of the protrusion 43, so that the thread cutting knife 5 is close to the part, located on the outer side of the front end of the push rod 4, of the silk thread 3 and cuts the silk thread.

As shown in fig. 4, the part of the transmission member 42 located at the front side of the projection 43 is a circular sleeve sleeved on the outer side surface of the rod core 41; as shown in fig. 6 and 7, the part of the conveying member 42 located at the front side of the protrusion 43 is an arc-shaped sleeve sleeved on the outer side surface of the rod core 41; as shown in fig. 8, the portion of the transferring member 42 located at the front side of the protrusion 43 has a rod-like structure. In another embodiment, as shown in fig. 7 and 8, when the portion of the transmission member 42 located at the front side of the protrusion 43 is an arc-shaped sleeve (fig. 7) or a rod-shaped structure (fig. 8), there are two transmission members 42 and two cutting knives 5, one cutting knife 5 is mounted on each transmission member 42, the two transmission members 42 are respectively located at both sides of the filament 3, and the two transmission members 42 are pushed to move along the circumferential direction of the protrusion 43, so that the two cutting knives 5 are both close to and cut the same portion of the filament 3 located at the outer side of the front end of the push rod 4, and thus, the two cutting knives 5 constitute a cutting structure to cut the filament 3. As shown in fig. 4, when the portion of the transmitting member 42 located on the front side of the protrusion 43 is a circular sleeve, the protrusion 43 forms a circular ring structure extending in the circumferential direction of the rod core 41, and when the portion of the transmitting member 42 located on the front side of the protrusion 43 is an arc sleeve or a rod-shaped structure, the protrusion 43 may be provided as a circular ring structure or an arc ring structure extending in the circumferential direction of the rod core 41 as needed (fig. 6 and 7 are circular ring structures, and fig. 8 is an arc ring structure). In the utility model, the protrusion 43 and the groove 44 which are matched in a clamping manner are arranged, so that on one hand, the conveying piece 42 moves relative to the rod core 41 along the circumferential direction of the rod core, and further, the thread cutting knife 5 is close to the silk thread 3 to realize the purpose of cutting the thread, on the other hand, the position of the conveying piece 42 in the length direction of the rod core 41 can be fixed, the situation that the conveying piece 42 mistakenly pushes the positioner 2 at the front end of the conveying piece is avoided due to the movement of the conveying piece 42 along the length direction of the rod core 41, and when the positioner 2 is required to be pushed to the outside of the puncture end of the needle sheath 1 to be released, the whole push rod 4 can be pushed by pushing the rod core 41. Furthermore, before and after the thread cutting operation, the transfer member 42 is fixed in position in the axial direction with respect to the stem core 41, and when the portion of the transfer member 42 located in front of the projection 43 is of an arc-shaped sleeve or rod-shaped structure, in order to prevent the movement of the groove 44 along the projection 43 under the action of gravity, a clip may be provided to clip on the front and rear sides of the projection 43 and abut on the lower edge of the groove 44. When the protrusion 43 is an arc-shaped ring structure, a baffle structure may be disposed at the lower edge of the protrusion 43 to prevent the conveying member 42 from sliding off, but not limited thereto.

The cutting edge structure of the thread cutter 5 may be an arc-shaped cutting edge, a pointed cutting edge, a straight cutting edge, etc., and the structural shape is not limited thereto, as long as the cutting edge is close to the thread to cut the thread quickly and accurately. The thread cutter 5 may be made of metal, such as stainless steel, alloy, etc., but is not limited thereto as long as it can cut the thread rapidly.

Through the structure of the thread cutter shown in fig. 1, 4 to 8, the thread positioned at the outer side of the front end of the push rod 4 can be cut quickly and simply, and the thread can be cut in vivo.

As shown in fig. 4, the push rod 4 is further provided with a wire storage bin 6 for storing the wire 3, the wire storage bin is located outside the second port 12 of the needle sheath 1, a wire outlet hole 61 is formed in the side surface of the wire storage bin 6, and the stored wire 3 penetrates out of the wire outlet hole 61 and enters the needle sheath 1 along the length direction of the push rod 4. When the thread cutting knife 5 and the push rod 4 adopt the structure and the position characteristics as shown in fig. 1, the thread storage bin 6 is movably connected with the push rod 4, the push rod 4 can rotate relative to the thread storage bin 6, when the push rod 4 rotates, the thread storage bin 6 is fixed, so that the position of the silk thread 3 is fixed, for example, a connecting hole is formed in the thread storage bin 6, the rear end of the push rod 4 is movably inserted into the connecting hole, or a connecting shaft is arranged, a rotating hole is formed in the center of the end face of the rear end of the push rod 4, one end of the connecting shaft is fixedly connected to the thread storage bin 6, the other end of the connecting shaft is movably inserted into the rotating hole, and the push rod 4 can rotate relative to the connecting shaft, but not limited thereto. When the structure and the position characteristics of the thread cutting knife 5 and the push rod 4 are shown in figures 4-8, the thread storage bin 6 and the push rod 4 can be fixedly connected or movably connected.

As shown in fig. 4, fig. 9-1 to fig. 9-3, the positioning needle device of the present invention further comprises a buckle 7, wherein the buckle 7 is provided with a clamping interface 71, and the clamping interface 71 can be clamped on the outer side surface of the push rod 4 located outside the second port 12 of the needle sheath 1 and abut against the end surface of the second port 12. The buckle 7 is used for positioning the position of the push rod 4 relative to the needle sheath 1, when the push rod 4 does not need to be pushed, the buckle 7 is clamped on the outer side face, located outside the second port 12 of the needle sheath 1, of the push rod 4, the butt is connected to the end face of the second port 12, the push rod 4 is clamped and cannot be pushed by mistake, and when the push rod 4 needs to be pushed, the buckle 7 can be detached. The catch 7 may adopt a structure as shown in fig. 9-1 to 9-3, such as an arc catch (fig. 9-1), a U-shaped catch (fig. 9-2), a clip-shaped catch (fig. 9-3), which is given by way of example only and is not limited thereto, as long as it is possible to achieve that the push rod 4 is caught without being pushed by mistake.

The part of the silk thread 3 which is positioned outside the second port 12 of the tube sheath 1 needs to be fixed before cutting, because the positioner 2 is positioned in the tissue, the front end of the silk thread 3 connected with the positioner 2 is also positioned, the cutting operation of the silk thread can be carried out only by slightly pulling the silk thread to fix the silk thread without moving, a silk thread clamp can also be adopted to clamp the silk thread, and the wire clamp is abutted against the outer end face of the second port 12 of the tube sheath 1 to fix the silk thread. Furthermore, the utility model arranges a locking mechanism in the wire storage bin 6 to fix the silk thread 3 more conveniently, more quickly and more accurately.

In an embodiment, as shown in fig. 10-11, the inside of the storage bin 6 is provided with a locking cavity 62 and a storage cavity 63 which are adjacent to each other, the wire outlet hole 61 is located on a side surface of the locking cavity 62, a wire inlet hole 64 is further formed on a side surface (as shown in fig. 10) or a bottom surface (as shown in fig. 11) of the locking cavity 62, the wire inlet hole 64 is communicated with the storage cavity 63, the storage cavity 63 is used for storing the wire 3, the wire 3 passes through the wire inlet hole 64 and the wire outlet hole 61 can move in the locking cavity 62 along the bottom surface of the locking cavity 62, an opening is formed in the upper end surface of the locking cavity 62, a locking column 65 which can move in the up-down direction is sleeved through the opening, and when the locking column 65 moves down, the part of the wire 3 passing through the locking cavity 62 is pressed and fixed. In this embodiment, the portion of the wire 3 inside the locking cavity 62 is attached to the bottom surface of the locking cavity 62, so when the locking post 65 is moved downward to press the wire, the positioning position of the wire 3 and the positioner 2 is not affected. Preferably, in order to facilitate the up-and-down movement of the locking post 65 and to more effectively compress the wire 3, the outer side of the locking post 65 is moved up and down against the inner side of the locking cavity 62.

In one embodiment, as shown in fig. 12, the inside of the storage bin 6 is provided with a locking cavity 62 and a storage cavity 63 which are adjacent to each other, the wire outlet hole 61 is located on the side surface of the locking cavity 62, the side surface of the locking cavity 62 is also provided with a wire inlet hole 64, the wire inlet hole 64 is communicated with the storage cavity 63, the longitudinal position of the wire inlet hole 64 is higher than that of the wire outlet hole 61, the storage cavity 63 is used for storing the silk thread 3, the upper end surface of the locking cavity 62 is provided with an opening, a locking column 65 which can be tightly attached to the inner side surface of the locking cavity 62 where the wire inlet hole 64 is located to move up and down is sleeved through the opening, a locking hole 66 which is transversely communicated is formed in the locking column 65, the silk thread 3 can move in the locking cavity 62 after passing through the wire inlet hole 64, the locking hole 66 and the wire outlet hole 61, when the locking post 65 is moved downwards against the inside face of the locking chamber 62 where the wire inlet hole 64 is located, the wire inlet hole 64 and the locking hole 66 are staggered, so that the wire 3 is caught. Because the position of the wire inlet 64 is higher than that of the wire outlet 61 in the longitudinal direction, when the silk thread 3 passes through the locking cavity 62, the locking hole 66 is flush and attached to the wire inlet 64, when the locking column 65 moves downwards, the locking hole 66 is staggered from the wire inlet 64, part of the silk thread in the wire storage cavity 63 is pulled to enter the locking cavity 62 and is pressed on the inner side surface of the locking cavity 62, and the silk thread close to the positioner 2 is not affected, because before the silk thread is locked, the locking hole 66 is flush and attached to the wire inlet 64, the silk thread between the locking hole 66 and the wire outlet 61 is inclined upwards and downwards, when the locking column 65 moves downwards, the silk thread between the locking hole 66 and the wire outlet 61 evolves towards the horizontal direction, the silk thread between the locking hole 66 and the wire outlet 61 has a certain margin to counteract the pulling influence of the locking operation on the silk thread close to the positioner 2, and the margin after the cancellation can also be adjusted by the up and down movement of the locking column 65, so that the wire is at the required tightness, thereby ensuring that the positioning position of the wire 3 and thus of the positioner 2 is not affected. It can be seen that the locking mechanism in this embodiment not only can achieve the fixation of the wire, but also can adjust the tightness of the wire suitable for being cut. Preferably, in order to make the locking post 65 move up and down more easily and to compress the wire 3 more effectively, the locking post 65 moves up and down against the other inner side of the locking cavity 62, except for the inner side of the locking cavity 62 where the outlet hole 61 is located.

The positioning needle tool can be made into various specifications according to actual requirements. For example, the length of the needle sheath 1 is 15 to 20cm, the inner diameter is 0.8 to 1.5mm, the length of the push rod 4 is 20 to 30cm, the maximum diameter of the portion located in the needle sheath 1 is 0.5 to 1.0mm, the length of the thread cutter 5 is 0.3 to 0.8mm, the contraction length of the retainer 2 in the needle sheath 1 is 1 to 2cm, the length in a free state is 2 to 5cm, and the maximum diameter is 1 to 2mm, but not limited thereto.

In conclusion, the positioning needle tool is characterized in that the positioner is connected with the silk thread, the positioner is positioned at the puncture end of the needle sheath, the front end of the push rod is close to the positioner, the silk thread is positioned on the outer side of the push rod, and the outer side surface of the push rod is provided with the thread cutter for cutting off the silk thread; in the positioning operation, after the needle sheath is punctured to the position near the focus, the positioner is pushed out of the puncturing end by the push rod to be released and positioned near the focus, the needle sheath is withdrawn to enable the front end of the push rod to be positioned at a preset position, such as the surface of a lung or the outside of a visceral pleura, and the like, the silk thread is fixed, the silk thread is cut by the thread cutter, and the needle sheath is withdrawn to be completely withdrawn. The positioning needle tool is utilized to position, the cutting of the silk thread is completed in vivo, the pushing of the push rod, the releasing of the positioner, the cutting of the silk thread and the releasing of the silk thread are successively operated in one step, the push rod does not need to be repeatedly inserted, and the problems of infection risks caused by the problems that the silk thread needs to be cut outside the body and the push rod needs to be repeatedly inserted to perform pushing operation when the positioner in the prior art is used for positioning operation and the difficulty and the unsafe factors of positioning operation are increased by complicated operation are solved. And the surface of the locator and the silk thread are coated with fluorescent materials, so that the extending path of the silk thread and the position of the locator can be clearly observed under a thoracoscope during the thoracoscope operation, and the locator and the silk thread are easier to be found compared with a common locator and the silk thread in the prior art, thereby providing an exact focus position for the operation and solving the problem that the locator in the prior art needs to determine the position through touch after the focus is positioned to bring adverse effects to the operation. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. A puncture positioning needle, characterized in that the positioning needle comprises at least: the needle sheath (1) is of a hollow structure with two open ends, the positioner (2) is positioned in the needle sheath (1) and comprises a head end (21) and an anchoring piece (22) connected with the head end (21), the anchoring piece (22) is close to a first port (11) of the needle sheath (1) and elastically shrinks in the needle sheath (1), the first port (11) is a puncture end, one end of the silk thread (3) is connected with the head end (21), the other end of the silk thread extends to the outer side of a second port (12) of the needle sheath (1), the front end of the push rod (4) is positioned in the needle sheath (1) and close to the head end (21), the rear end of the push rod extends to the outer side of the second port (12) of the needle sheath (1), and the positioner (2) is pushed out of the first port (11) of the needle sheath (1) by the push rod (4), the anchoring part (22) is elastically released and anchored in target tissue, the silk thread (3) is positioned on the outer side of the push rod (4) and extends along the length direction of the push rod (4), the thread cutting knife (5) is installed on the outer side surface of the push rod (4), and the thread cutting knife (5) can be close to the part, positioned on the outer side of the front end of the push rod (4), of the silk thread (3) and cuts the silk thread.

2. The puncture positioning needle set according to claim 1, wherein: the anchoring piece (22) is composed of at least one elastic filament, the elastic filament is elastically contracted in the needle sheath (1) after being processed and shaped in at least one of bending, winding and weaving modes, and the head end (21) is the end part of the elastic filament or a structure formed by fixedly connecting a block-shaped structure and the end part of the elastic filament; the silk thread (3) is made of flexible fiber materials, and the positioner (2) and the silk thread (3) are coated with fluorescent materials.

3. The puncture positioning needle set according to claim 1, wherein: the side of the needle sheath (1) is marked with scales (13), the positioning needle further comprises a buckle (7), a clamping interface (71) is arranged on the buckle (7), the clamping interface (71) can be clamped on the outer side surface of the push rod (4) outside the second port (12) of the needle sheath (1) and abutted against the end surface of the second port (12).

4. The puncture positioning needle set according to claim 1, wherein: one end of the thread cutting knife (5) is fixedly connected to the outer side face of the front end of the push rod (4), the side face of the thread cutting knife is of a knife edge structure, and when the push rod (4) rotates, the knife edge of the thread cutting knife (5) is close to the position, located on the outer side of the front end of the push rod (4), of the silk thread (3) and cuts the silk thread.

5. The puncture positioning needle set according to claim 1, wherein: the push rod (4) comprises a rod core (41) and a conveying piece (42), the front end of the rod core (41) is located in the needle sheath (1) and close to the head end (21) of the positioner (2), the rear end of the rod core extends to the outer side of the second port (12) of the needle sheath (1), a protrusion (43) extending along the circumferential direction of the rod core is arranged on the outer side surface of the second port (12) of the needle sheath (1), a groove (44) which is clamped with the protrusion (43) and can move along the circumferential direction of the protrusion (43) is arranged on the conveying piece (42), the rear end of the rod core (41) is located on the rear side of the protrusion (43), the rear end of the conveying piece (42) is located on the rear side of the protrusion (43), the front end of the conveying piece is located on the front side of the protrusion (43), and the front end of the rod core (41) extends to the outer side of the needle sheath (41) along the length direction of the rod core (41), and attached on the lateral surface of pole core (41), the one end fixed connection of secant sword (5) is in on the front end lateral surface of conveying piece (42), and its side is the cutting edge structure, promotes conveying piece (42) move along protruding (43) circumferencial direction for secant sword (5) are close to the position that is located the front end outside of push rod (4) of silk thread (3) and cut off it.

6. The puncture positioning needle set according to claim 5, wherein: the part of the conveying piece (42) located on the front side of the bulge (43) is a circular sleeve and is sleeved on the outer side face of the rod core (41), or the part of the conveying piece (42) located on the front side of the bulge (43) is an arc-shaped sleeve and is sleeved on the outer side face of the rod core (41), or the part of the conveying piece (42) located on the front side of the bulge (43) is of a rod-shaped structure.

7. The puncture positioning needle set according to claim 6, wherein: when the part of conveying piece (42) that is located the front side of arch (43) is arc sleeve or shaft-like structure, conveying piece (42), secant sword (5) are two, install secant sword (5) on every conveying piece (42), and two conveying pieces (42) are located respectively the both sides of silk thread (3), promote two conveying pieces (42) all follow the circumferencial direction of arch (43) removes for two secant swoves (5) all are close to the same position that is located the front end outside of push rod (4) of silk thread (3) and cut it.

8. The puncture positioning needle set according to claim 1, wherein: the push rod (4) is further provided with a wire storage bin (6) for storing silk threads (3), the wire storage bin is located on the outer side of the second port (12) of the needle sheath (1), and a wire outlet hole (61) is formed in the side face of the wire storage bin (6).

9. The puncture positioning needle set according to claim 8, wherein: the novel silk thread storage device is characterized in that adjacent locking cavities (62) and a silk thread storage cavity (63) are formed in the silk thread storage bin (6), the silk thread outlet holes (61) are located on the side faces of the locking cavities (62), the side faces or the bottom faces of the locking cavities (62) are further provided with a silk thread inlet hole (64), the silk thread inlet hole (64) is communicated with the silk thread storage cavity (63), the silk thread storage cavity (63) is used for storing silk threads (3), the silk threads (3) penetrate through the silk thread inlet hole (64) and the silk thread outlet holes (61) and can move in the locking cavities (62) along the bottom faces attached to the locking cavities (62), an opening is formed in the upper end face of the locking cavities (62), a locking column (65) capable of moving in the vertical direction is sleeved through the opening, and when the locking column (65) moves downwards, the portion of the silk threads (3) penetrating in the locking cavities (62) is pressed and fixed.

10. The puncture positioning needle set according to claim 8, wherein: the novel yarn storage device is characterized in that adjacent locking cavities (62) and yarn storage cavities (63) are formed in the yarn storage bin (6), yarn outlet holes (61) are located on the side faces of the locking cavities (62), yarn inlet holes (64) are formed in the side faces of the locking cavities (62), the yarn inlet holes (64) are communicated with the yarn storage cavities (63), the positions of the yarn inlet holes (64) in the longitudinal direction are higher than those of the yarn outlet holes (61), the yarn storage cavities (63) are used for storing yarns (3), openings are formed in the upper end faces of the locking cavities (62), locking columns (65) which can be tightly attached to the inner side faces, where the yarn inlet holes (64) are located, of the locking cavities (62) to move in the up-down direction are sleeved through the openings, the locking holes (66) which are transversely communicated are formed in the locking columns (65), and the yarns (3) can pass through the yarn inlet holes (64), the locking holes (66) and the yarn outlet holes (61) and can move in the locking cavities (62), when the locking column (65) moves downwards along the inner side surface of the locking cavity (62) tightly attached to the wire inlet hole (64), the wire inlet hole (64) and the locking hole (66) are staggered, so that the wire (3) is clamped.

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