CN117731372A - Lung nodule positioning needle - Google Patents

Abstract

The invention discloses a lung nodule positioning needle, and belongs to the technical field of medical appliances; solves the technical problems that the existing lung nodule positioning needle has positioning wire falling, shifting, breaking, unclear positioning wire identification and uncertain positioning depth. The lung nodule positioning needle comprises a positioning wire and a guide needle, wherein the positioning wire comprises a positioning core wire and a positioning hook, and the positioning hook is provided with a first bent structure; the first bent structure consists of a first hook and a second hook; defining a plane where the first hook is positioned as a first plane, and defining a plane where the second hook is positioned as a second plane; the first plane, the second plane and the axis of the positioning core wire are not coplanar with each other. The lung nodule positioning needle provided by the invention can firmly fix focus tissues and clearly position focus tissues and determine the depth of the focus tissues.

Description

Lung nodule positioning needle

Technical Field

The invention relates to the technical field of medical instruments, in particular to a lung nodule positioning needle.

Background

With the wide application of low-dose spiral CT in lung nodule screening, the detection rate of lung nodules is obviously improved, and lung nodule excision under a television thoracoscope (VATS) is an effective diagnosis and treatment operation at present, but for lung nodules with the diameter smaller than 10mm or the distance from pleura larger than 5mm, visual observation and finger touch are difficult to accurately position in the television thoracoscope lung nodule excision, and inaccurate positioning can lead to risks of increased focus excision difficulty, oversized excision scope, prolonged operation time, increased lung tissue damage and the like, so that in order to more accurately excision focus in operation, accurate positioning of lung nodules before operation is important.

At present, a common method for preoperative lung nodules at home and abroad is a Hook-wire (Hook-wire) positioning method. The positioning method has the risks of easily shifting and falling off the positioning hooks, aggravating the damage of lung tissues, uncertainty of the excision scope in the surgical excision process and the like.

Disclosure of Invention

In view of the above, the present invention is directed to a pulmonary nodule positioning needle for solving the problems of risk in the existing pulmonary nodule positioning wire and the product in the guiding needle field thereof, including at least one of the problems of wire falling, displacement, breakage, unclear identification of the wire and uncertainty of the positioning depth.

The aim of the invention is mainly realized by the following technical scheme:

the invention provides a lung nodule positioning needle, which comprises a positioning wire and a guide needle, wherein the positioning wire comprises a positioning core wire and a positioning hook, and the positioning hook is provided with a first bent structure;

the first bent structure consists of a first hook and a second hook; defining a plane where the first hook is positioned as a first plane, and defining a plane where the second hook is positioned as a second plane;

the first plane, the second plane and the axis of the positioning core wire are not coplanar with each other.

In one possible design, the first curved structure is a spiral wrap; the first hook and/or the second hook are in a spiral surrounding rising state around the axis of the positioning core wire.

In one possible design, the number of windings of the first hook and/or the second hook around the axis of the positioning core wire is less than or equal to 1 winding.

In one possible design, the first plane is at an angle α to the axis of the positioning core wire, the second plane is at an angle β to the axis of the positioning core wire, 0 ° < α <60 °,0 ° < β <60 °.

In one possible design, 10 ° < α <45 °,10 ° < β <45 °.

In one possible design, the positioning hook further comprises a second curved structure comprising a third hook and a fourth hook;

the third hook and the first hook are integrally formed, the bending directions of the third hook and the first hook are opposite, and the fourth hook and the second hook are integrally formed, and the bending directions of the fourth hook and the second hook are opposite.

In one possible design, a first bending buffer zone is arranged between the positioning core wire and the first hook, and a second bending buffer zone is arranged between the positioning core wire and the second hook;

the first bending buffer zone, the positioning core wire and the first hook are integrally formed; the second bending buffer zone, the positioning core wire and the second hook are integrally formed.

In one possible design, the positioning wire is a rigid positioning wire;

the locating hook is arranged at one end of the locating core wire, and the locating core wire and the locating hook are integrally formed.

In one possible design, the positioning core wire is provided with a positioning mark and a depth prompt mark;

the positioning mark is used for enhancing the developability of the positioning hook under CT; the depth prompt mark is a touchable annular tube and is arranged on the positioning core wire.

In one possible design, the depth cue marks are spaced apart at a depth of every 10mm and the number of depth marks is increased in a manner that doubles every 10mm distance, i.e. every 10mm of depth the penetration depth increases by 1 depth mark compared to the number of the previous depth mark.

Compared with the prior art, the invention has at least one of the following beneficial effects:

(1) The positioning wire adopts the rigid positioning wire, the positioning hook on the positioning core wire and the rigid core wire are integrally formed, the positioning wire and the rigid core wire are both made of wires, no joint exists between the positioning core wire and the positioning hook, the overall strength of the positioning wire is high, and the positioning wire is not easy to bend, deform and break, so that the risk of breaking and separating between the positioning core wire and the positioning hook can be avoided.

(2) The depth prompt mark is arranged on the positioning core wire, so that the following effects can be realized: 1. by setting depth cue marks on the positioning core wire, an operator can determine the depth of a focus according to the positions and the number of the depth marks. 2. The depth prompt mark can avoid the condition that the depth prompt mark cannot be identified due to the fact that the depth prompt mark is dyed by blood, and even if the condition that the depth prompt mark is dyed by blood exists, an operator can still identify the depth of a lung nodule in a touch mode, so that the depth prompt mark cannot be influenced by blood, is not easy to be dyed by blood, and is easy to identify and distinguish. 3. Even if stained, the depth of the lung nodule (lesion) can be determined by touch.

(3) The plane formed by the first hook and the second hook and the positioning core wire are obliquely arranged, and the arrangement mode can enable the positioning hook to increase the volume and the area of the focus tissue to be positioned, further increase the positioning firmness, prevent the positioning wire from shifting or falling off, and enable the needle retraction force to be small.

In the invention, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the embodiments of the invention particularly pointed out in the written description and drawings.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, like reference numerals being used to refer to like parts throughout the several views.

FIG. 1 is a schematic view of a lung nodule positioning needle (schematic view of a positioning wire after it has been pushed out of a guide needle cannula);

FIG. 2 is a schematic view of a retaining wire inside a guide needle cannula;

FIG. 3 is a schematic view of a section A-A of a retaining wire inside a guide needle cannula;

FIG. 4 is a schematic view of the structure of the introducer needle;

FIG. 5 is a schematic view of a structure of a positioning wire 1;

FIG. 6 is a schematic view of a structure of a positioning wire 2;

FIG. 7 is a schematic view of a structure of a positioning wire 3;

FIG. 8 is a schematic view of the structure of a guide needle cannula;

FIG. 9 is an enlarged view of a portion B of FIG. 8;

FIG. 10a is a schematic view of the structure of a needle point of a guide needle 1;

FIG. 10b is a schematic view of the structure of the needle tip of the introducer needle 2;

FIG. 10c is a schematic view of the structure of the needle tip of the introducer needle 3;

FIG. 11a is a schematic view of the structure of the needle tip of the guide needle of the present invention;

FIG. 11b is a schematic view of a conventional introducer needle tip;

FIG. 11c is a left side view of FIG. 11 b;

FIG. 12 is a schematic view of a positioning core wire structure 1;

FIG. 13 is a schematic view of a positioning core wire structure 2;

FIG. 14a is a schematic view of a first curved structure;

FIG. 14b is a schematic view of a structure in which a buffer zone is provided between the first curved structure and the rigid core wire;

FIG. 15a is a schematic view of the structure of the first hook and the second hook of the positioning hook on either side of the axis of the rigid core wire;

FIG. 15b is a schematic view of the structure of the angles between the plane formed by the first hook and the plane formed by the second hook of the positioning hook and the axis of the rigid core wire;

FIG. 16 is a schematic view of the structure of the positioning hook as it is threaded up around a rigid core wire 1;

FIG. 17a is a schematic view of the structure of the positioning hook as it is spirally raised around the rigid core wire 2

FIG. 17b; a structural schematic diagram 3 when the positioning hook spirally rises around the rigid core wire;

FIG. 18 is a schematic view of a second curved structure 1;

FIG. 19 is a schematic view of a second curved structure 2;

FIG. 20 is a schematic view of a second curved structure 3;

FIG. 21a is a schematic view of a positioning needle prior to penetration;

FIG. 21b is a schematic view of the positioning needle after penetration;

FIG. 21c is a schematic view of the structure for securing a positioning wire and withdrawing a guide needle;

fig. 21d is a schematic view of the introducer needle after it has been withdrawn.

Reference numerals:

1-a guide needle; 11-guiding needle tube; 111-a needle tip of a guide needle; 1111—a first puncture bevel; 1112-a second puncture bevel; 112-introducer needle scale markings; 12-guiding the needle handle; 121-guide needle tip bevel orientation mark; 2-positioning wires; 21-positioning marks; 22-depth cue markers; 23-bending-resistant support tubes; 24-release of the tag; 25-positioning the core wire; 251-positioning hooks; 2511-first curved structure; 2512-second bent structures; 2513—a first hook; 2514-a second hook; 2515-third hooks; 2516-fourth hooks; 252-rigid core wire; 26-a first curved buffer zone; 27-a second curved buffer zone.

Detailed Description

The following detailed description of preferred embodiments of the invention is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the invention, are used to explain the principles of the invention and are not intended to limit the scope of the invention.

The invention provides a lung nodule positioning needle, as shown in fig. 1, 2 and 14a, comprising a positioning wire and a guide needle, wherein the positioning wire 2 comprises a positioning core wire 25 and a positioning hook 251, and the positioning hook 251 is provided with a first bent structure 2511; the first curved structure 2511 is comprised of a first hook 2513 and a second hook 2514; defining a plane in which the first hooks 2513 are located as a first plane, and defining a plane in which the second hooks 2514 are located as a second plane; the first plane, the second plane and the axis of the positioning core wire 25 are not coplanar with each other.

Specifically, the positioning hook 251 of the present invention includes a first bent structure 2511, the first bent structure 2511 including a first bent hook 2513 and a second bent hook 2514; the positioning hook 251 and the rigid core wire 252 are integrally formed, the positioning core wire 25 is formed by integrally processing a wire after being folded in half, two ends of the wire are respectively processed into a first hook 2513 and a second hook 2514, namely, the first hook 2513, the second hook 2514 and the rigid core wire 252 are integrally formed, and the stronger firmness of the positioning core wire 25 is ensured.

Alternatively, as shown in fig. 13, the positioning core wire 25 is formed by folding a single wire material from the middle, forming the wire material in parallel at a position near the middle of the wire material after folding (the middle position before folding), forming the wire material in a spiral cross shape at two end positions near the wire material (the two end positions before folding), and forming the first hook 2513 and the second hook 2514 at the two ends of the wire material.

The locating hooks in the prior art are arranged on the same plane, the structural form is single, the grabbed tissue is small in volume, the locating hooks are easy to fall off and shift, and then the locating is failed, so that the patient needs to be located for a plurality of times, the tissue injury of the patient is large, and the bleeding is more. In addition, the force of the existing coplanar positioning needle hooking (retracting) is large. Because the force of the coplanar positioning hook is determined by the angle between the plane of the positioning hook 251 and the axis of the positioning core wire 25 when the needle is inserted (retracted), when the angle is 0 °, that is, the axis of the existing positioning hook 251 and the axis of the positioning core wire 25 are coplanar, the bending height of the positioning hook 251 is higher, and the force required for inserting and retracting the needle is larger.

It should be noted that, in one aspect, the axes of the first hook 2513, the second hook 2514 and the positioning core wire 25 of the present invention are not coplanar with each other, i.e. the positioning hook 251 is at an angle to the core wire axis, and the first hook 2513 and the second hook 2514 are not on the same plane. Compared with the existing structure, the invention can increase the volume of anchored tissues, is not easy to cause the phenomena of falling and displacement of the positioning hooks 251, and can further avoid the phenomenon of repeated positioning. On the other hand, since the positioning hook 251 and the axis of the rigid core wire 252 form a certain included angle, firstly, the height of the positioning hook 251 is smaller than that of the existing coplanar structure, and secondly, the positioning hook 251 and the axis of the core wire form a certain angle, and a bending buffer zone is added between the axis of the rigid core wire 252 and the first bending structure 2511, so that the positioning hook 251 has smaller force when retracting the needle under the same force. Can be convenient for doctors to operate, and can be repeatedly positioned for many times.

The included angle between the first plane and the axis of the positioning core wire 25 is alpha, the included angle between the second plane and the axis of the positioning core wire 25 is beta, and the included angle is 0 degrees < alpha <60 degrees, and 0 degrees < beta <60 degrees.

Compared with the prior art, through controlling the contained angle of first plane and location core silk 25 axis and the contained angle of second plane and location core silk 25 axis, can guarantee that the locating hook 251 is higher than less on the square of location core silk 25 axial to make the dynamics of needle retracting simultaneously little.

It is also noted that 10 ° < α <45 °,10 ° < β <45 °, in order to further reduce the narrowing force.

For example, as shown in fig. 14a and 14b, when the first hook 2513 and the second hook 2514 are on the same side of the axis of the positioning core wire 25 (there is a plane passing through the axis of the positioning core wire 25 and capable of separating the first hook 2513 and the second hook 2514 on the same side of the plane), the first plane formed by the first hook 2513 forms an angle α1 with the axis of the positioning core wire 25, and the second plane formed by the second hook 2514 forms an angle β1,0 ° < α1<60 °,0 ° < β1<60 °, further 10 ° < α1<45 °,10 ° < β1<45 °.

As shown in fig. 15a and 15b, when the first hook 2513 and the second hook 2514 are on both sides of the axis of the positioning core wire 25 (there is a plane passing through the axis of the positioning core wire 25 and separating the first hook 2513 and the second hook 2514 on both sides of the plane), the first plane formed by the first hook 2513 forms an angle α2 with the axis of the positioning core wire 25, and the second plane formed by the second hook 2514 forms an angle β2 with the axis of the positioning core wire 25, 0 ° < α2<60 °,0 ° < β2<60 °, further 10 ° < α2<45 °,10 ° < β2<45 °.

In addition, as shown in fig. 14a, a first bending buffer zone 26 is provided between the positioning core wire 25 and the first hook 2513, and a second bending buffer zone 27 is provided between the positioning core wire 25 and the second hook 2514; the first curved buffer zone 26 is integrally formed with the positioning core wire 25 and the first hook 2513; the second curved buffer zone 27 is integrally formed with the positioning core wire 25 and the second hook 2514. Compared with the prior art, the needle retraction force can be further reduced by arranging the first bending buffer belt and the second bending buffer belt, so that an operator can conveniently retract needles.

The positioning wire 2 of the present invention is a rigid positioning wire 2; the locating hook 251 is arranged at one end of the locating core wire 25, and the locating core wire 25 and the locating hook 251 are integrally formed.

In the prior art, flexible core wires are adopted, and the flexible core wires are very easy to break; and the flexible core wire and the positioning hook 251 are connected in a knotting manner, the risk of breakage at the connection is also easy to occur.

Compared with the prior art, the invention ensures the strength of the positioning core wire 25, and does not cause the breakage phenomenon of the positioning core wire 25; in addition, the positioning core wire 25 and the positioning hook 251 are integrally formed, and no joint exists between the positioning core wire and the positioning hook, so that the positioning hook 251 and the positioning core wire 25 can not be broken, and the falling risk is reduced.

It should be noted that the first curved structure 2511 of the present invention is a spiral surrounding structure, as shown in fig. 16, 17a and 17b, the first hooks 2513 and/or the second hooks 2514 are in a spiral surrounding raised state around the axis of the positioning core wire 25. The number of windings of the first hook 2513 and/or the second hook 2514 around the axis of the positioning core wire 25 is 1 turn or less.

Specifically, the spiral surrounding rising structure of the present invention includes the following two cases: in the first case, one of the first hook 2513 and the second hook 2514 is in a state of spirally winding around the axis of the positioning core wire 25. In the second case, both the first hook 2513 and the second hook 2514 are in a spirally wound raised state about the axis of the positioning core wire 25.

Compared with the prior art, the first hook 2513 and the second hook 2514 spiral around the positioning core wire 25 and rise, so that spiral surrounding acting force is generated on focus tissues after the positioning needle is released, and the positioning firmness is improved.

As shown in fig. 18 to 20, the positioning hook 251 further includes a second bent structure 2512, and the second bent structure 2512 includes a third hook 2515 and a fourth hook 2516, wherein the third hook 2515 is integrally formed with the first hook 2513, the fourth hook 2516 is integrally formed with the second hook 2514, the bending direction of the third hook 2515 is opposite to the bending direction of the first hook 2513, and the bending direction of the fourth hook 2516 is opposite to the bending direction of the second hook 2514. The third hook 2515 and the fourth hook 2516 may be in the form of a bent line or a bent line.

In addition, as shown in fig. 18 and 19, the third and fourth hooks 2515 and 2516 are either proximate to the positioning core wire 25 or distal from the positioning core wire 25, or, as shown in fig. 20, the third and fourth hooks 2515 and 2516 are passed over the axis of the rigid core wire 252 and then bent back.

The positioning needle in the prior art has a single structure, and the area and the volume for grabbing focus tissues are not large enough, so that the focus tissues are not firm after being fixed. In addition, the number of the claws of the existing positioning needle is one claw or more, in particular to a multi-claw structure, the damage of lung tissues of a patient is easily increased in the puncturing positioning process, the bleeding is increased, and the multi-claw structure is easily cut off and remains in the lung.

Compared with the prior art, on one hand, the positioning reliability can be increased by arranging the first bent structure 2511 and the second bent structure 2512, so that the risk of falling and shifting of the positioning wire 2 caused by respiratory motion of the lung is effectively reduced, and the positioning wire 2 is finally prevented from shifting or falling; on the other hand, the first bent structure 2511 and the second bent structure 2512 of the present invention have opposite directions, and the positioning hooks 251 may restrict the movement of the positioning core wire 25 in both directions, thereby increasing the positioning reliability.

It should be further noted that, as shown in fig. 3 to 11, the positioning core wire 25 is provided with a positioning mark 21, a depth indication mark 22, a bending-resistant support tube 23 and a release mark 24 which are adjacent in sequence; the depth prompt mark 22 and the bending-resistant supporting tube 23 are touchable annular tubes and are sleeved on the positioning core wire 25; the release mark 24 is used for judging whether the positioning wire 2 is withdrawn from the guide needle 1; the positioning hook 251 is disposed at one end of the rigid core wire 252, and the positioning hook 251 and the rigid core wire 252 are integrally formed.

In the existing Hook-wire positioning method, a positioning needle consists of a positioning needle and a flexible wire, the flexible wire is knotted and fixedly connected to a needle hole of the positioning needle, and a separation fracture phenomenon exists, so that the positioning needle falls off in lung tissues.

Compared with the prior art, the positioning wire 2 provided by the invention adopts the rigid positioning wire 2, the positioning hooks 251 on the positioning core wire 25 and the rigid core wire 252 are integrally formed, and are both formed by wires, no connecting part exists between the positioning core wire 25 and the positioning hooks 251, and the positioning wire 2 has high integral strength and is not easy to bend, deform and break, so that the risk of breaking and separating between the positioning core wire 25 and the positioning hooks 251 can be avoided.

In addition, the existing positioning needle has more structural parts, so that the operation is easy to be complicated; on the other hand, too many structural components tend to increase the gap between the devices, increasing the risk of pneumothorax.

Compared with the prior art, the positioning needle provided by the invention only comprises two large structures, namely the guide needle 1 and the positioning wire 2, and has a simple structure, so that the operation is simple when the positioning needle is used, the operation time can be shortened, and the damage to a patient can be reduced.

As shown in fig. 12, the positioning wire 2 used in the present invention is integrally formed of a wire material having memory, and the positioning wire 2 is, for example, a nickel-titanium wire.

The existing puncture needle matched with Hook-wire has no needle core, so that the damage of lung tissues is aggravated in the process of puncture, and pneumothorax is increased. Compared with the prior art, the positioning needle comprises the positioning wire 2 and the guide needle 1, and the positioning wire 2 can be inserted into and pushed out of the guide needle 1.

In the prior art, the color strips with different colors are dyed on the core wire, the color strips are easy to be dyed into red by blood, the color strips cannot be identified, and the identification degree of the color strips is not obvious as that of the annular metal tube. And depth, once the core filament is stained red by blood, the depth cannot be identified.

Compared with the prior art, the depth indication mark 22 on the positioning core wire 25 has the following functions: (1) By providing depth cue markers 22 on the positioning core wire 25, an operator can determine the depth of the lesion based on the location and number of depth markers. (2) The depth indication mark 22 of the invention can avoid the condition that the lung nodule cannot be identified due to the staining of the blood because of adopting the touchable annular tube, and even if the condition of staining the blood exists, the operator can still identify the depth of the lung nodule in a touching way, so the depth indication mark 22 is not influenced by the blood, is not easy to stain the blood, and is easy to identify and distinguish. (3) Even if stained, the depth of the lung nodule (lesion) can be determined by touch.

Note that, the depth indication mark 22 may be made of a metal material having developability, such as a stainless steel material, tantalum metal, platinum iridium alloy, etc., so as to facilitate development in puncture or excision.

The positioning wire 2 is provided with the positioning mark 21, and the positioning mark 21 adopts a touchable annular tube, so that on one hand, the developability of the positioning hook 251 under CT can be enhanced, and the lung nodule position can be determined; on the other hand, when the lung nodule is resected, the locating hook 251 is located using the touch loop.

The release mark 24 is used to indicate whether the state of the positioning hook 251 on the positioning wire 2 is released, and when released, the release mark 24 is shown in fig. 1, and when not released, the release mark is shown in fig. 2.

The purpose of the invention to provide a bending-resistant support tube 23 is: stress concentration received by the positioning wire 2 during release is reduced, strength of the positioning core wire 25 during release is enhanced, and bending deformation of the positioning wire 2 during pushing is not easy to occur.

It should be noted that the positioning mark 21, the depth indication mark 22, the bending-resistant supporting tube 23, the release mark 24 and the positioning core wire 25 may be connected by glue, welding, crimping, interference fit, etc. And the positioning mark 21, the depth prompt mark 22, the bending-resistant supporting tube 23, the release mark 24 and the positioning core wire 25 are all made of metal materials, such as stainless steel materials, metal tantalum and platinum iridium alloy materials.

The locating hooks 251 are of a double-hook structure, and damage to lung tissues can be reduced and bleeding risk can be reduced by reducing the number of the locating hooks 251.

As shown in fig. 3 and 4, the guide needle 1 of the present invention includes a guide needle tube 11 and a guide needle handle 12; the guide needle tube 11 comprises an integrally formed tube body and a guide needle tip 111, the guide needle tip 111 is arranged at one end of the tube body, and scale marks 112 are arranged on the tube body. It should be noted that, the scale marks 112 are arranged at intervals of 1cm, each 1cm interval has 1 scale mark band, the scale mark bands of 5cm and 5cm times are obviously different from other scale mark bands, and the scale mark bands can be fixed on the needle tube main body by laser printing, ink spraying and other modes.

In the prior art, a Hook-wire (Hook-wire) is adopted to position a lung nodule, the tail end of the Hook-wire adopted by the method is not marked by scales, the depth of a focus cannot be determined, the large cutting range is easily caused in the surgical cutting process, and the risks of residual lung and the like are cut off by the wire. Compared with the prior art, the needle tube main body is provided with the scale marks, so that an operator can intuitively know the needle inserting depth when using the positioning needle.

In order to reduce puncture resistance and reduce damage to a patient, as shown in fig. 10a to 10c and 11a, the guide needle tip 111 of the present invention is provided with a guide needle tip bevel, the guide needle tip bevel includes a first puncture bevel 1111 and a second puncture bevel 1112, the first puncture bevel 1111 is disposed at an end far from the needle tube main body, the second puncture bevel 1112 is adjacent to the needle tube main body, and the first puncture bevel 1111 and the second puncture bevel 1112 are not coplanar; the first puncture inclined plane 1111 is a semi-annular inclined plane, the second puncture inclined plane 1112 is a V-shaped inclined plane, and the opening directions of the semi-annular inclined plane and the V-shaped inclined plane are oppositely arranged; the V-shaped bevel bottom is a tapered piercing tip in a direction away from the first piercing bevel 1111.

As shown in fig. 11b and 11c, the puncture needle in the prior art is provided with only one puncture bevel, and the puncture tip has a wider width, which results in a larger puncture resistance and serious injury to the patient. Compared with the prior art, the invention can reduce the length of the puncture inclined plane (compared with the prior art that one puncture inclined plane is arranged) by arranging the first puncture inclined plane 1111 and the second puncture inclined plane 1112 and reduce the duration of puncture force and the risk of bleeding of a patient by arranging the second puncture inclined plane 1112. In addition, a puncture tip is arranged on the first puncture inclined plane 1111, so that the puncture resistance can be effectively reduced, and the puncture damage can be reduced.

In order to further reduce penetration resistance and thus reduce the risk of bleeding from the lung tissue, the angle between the second penetration bevel 1112 and the axis of the needle cannula body of the present invention is α,10 ° < α <20 °, as shown in fig. 9.

The guiding needle handle 12 of the invention is provided with a guiding needle tip inclined plane direction mark 121, the guiding needle tip inclined plane direction mark 121 is in a concave structure or a convex structure, and the guiding needle tip inclined plane direction mark is provided with a corresponding bright color highlighting display for marking the direction of the guiding needle tip inclined plane.

Compared with the prior art, the invention is convenient for operators to directly judge the direction of the inclined plane of the guide needle tube 111 in the operation by arranging the inclined plane direction mark of the guide needle tube 111 on the guide needle handle 12, and conveniently adjusts the selection of the release direction of the positioning wire 2.

To determine the depth of a lesion, as shown in fig. 5 and 6, the depth cue marks 22 of the present invention are arranged at intervals every 10mm of size depth, and the number of depth marks is increased in a manner of doubling every 10mm of distance, i.e., every 10mm of depth increase, the number of depth marks is increased by 1 compared to the previous depth mark.

Specifically, the depth cue marks 22 are arranged and distributed at intervals of 10mm, at most 5 segments are arranged in a distribution, and the number of the depth cue marks 22 is increased by a corresponding multiple according to the multiple of the distance.

In summary, the present invention provides a lung nodule positioning needle having the capability of firmly fixing focal tissue and clearly positioning focal tissue and determining its depth.

The invention also provides a method for positioning by using the lung nodule positioning needle, as shown in fig. 21a to 21d, comprising the following steps:

step 1, an operator punctures the lung nodule positioning points to puncture points;

step 2, puncturing a lung nodule positioning needle to focus tissues;

step 3, an operator fixes the positioning wire 2, then withdraws the guide needle 1 and releases the positioning wire 2;

and 4, withdrawing the guide needle 1, and keeping the positioning wire 2 on focus tissues.

The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.

Claims (10)

1. The lung nodule positioning needle is characterized by comprising a positioning wire and a guide needle, wherein the positioning wire comprises a positioning core wire and a positioning hook, and the positioning hook is provided with a first bent structure;

the first bent structure consists of a first hook and a second hook; defining a plane where the first hook is located as a first plane, and defining a plane where the second hook is located as a second plane;

the first plane, the second plane and the axis of the positioning core wire are not coplanar with each other.

2. The pulmonary nodule positioning needle of claim 1, wherein the first curved structure is a spiral surrounding structure; the first hook and/or the second hook are in a spiral surrounding rising state around the axis of the positioning core wire.

3. The pulmonary nodule positioning needle of claim 2, wherein the number of turns of the first and/or second hooks around the axis of the positioning core wire is 1 turn or less.

4. The pulmonary nodule positioning needle of claim 1, wherein the first plane is at an angle α to the positioning core wire axis and the second plane is at an angle β to the positioning core wire axis, 0 ° < α <60 °,0 ° < β <60 °.

5. The pulmonary nodule positioning needle of claim 4, wherein 10 ° < α <45 °,10 ° < β <45 °.

6. The pulmonary nodule positioning needle of claim 1, wherein the positioning hook further comprises a second curved structure comprising a third hook and a fourth hook;

the third hooks and the first hooks are integrally formed and have opposite bending directions, and the fourth hooks and the second hooks are integrally formed and have opposite bending directions.

7. The pulmonary nodule positioning needle of claim 1, wherein a first curved buffer zone is provided between the positioning core wire and the first hook, and a second curved buffer zone is provided between the positioning core wire and the second hook;

the first bending buffer zone, the positioning core wire and the first hook are integrally formed; the second bending buffer zone, the positioning core wire and the second hook are integrally formed.

8. The pulmonary nodule positioning needle of claim 1, wherein the positioning wire is a rigid positioning wire;

the locating hook is arranged at one end of the locating core wire, and the locating core wire and the locating hook are integrally formed.

9. The lung nodule positioning needle of claims 1-8, wherein the positioning core wire is provided with positioning marks and depth indication marks;

the positioning mark is used for enhancing the developability of the positioning hook under CT; the depth prompt mark is a touchable annular tube and is arranged on the positioning core wire.

10. The pulmonary nodule positioning needle of claim 9, wherein the depth cue marks are spaced apart every 10mm of depth, each 10mm of depth of penetration being increased by 1 depth mark compared to the number of previous depth marks.