CN218684744U - Pulmonary nodule positioning device - Google Patents

Abstract

The utility model discloses a pulmonary nodule positioning device, belonging to the technical field of medical instruments; the technical problem that the positioning wire is easy to shift and fall off due to the fact that the conventional pulmonary nodule positioning and positioning device is not firm in positioning is solved. The pulmonary nodule positioning device comprises a positioning wire and an introducer needle, wherein the positioning wire can be inserted into and withdrawn from the interior of the introducer needle; the positioning wire is a rigid positioning wire and comprises a positioning core wire, the positioning core wire comprises a positioning hook and a rigid core wire, the positioning hook is arranged at one end of the rigid core wire, and the positioning hook and the rigid core wire are integrally formed; the positioning hook comprises a first bent structure and a second bent structure, the first bent structure comprises a first hook and a second hook, and the second bent structure comprises a third hook and a fourth hook; the third hook and the first hook are integrally formed and are opposite in bending direction, and the fourth hook and the second hook are integrally formed and are opposite in bending direction. The utility model discloses a pulmonary nodule positioner can be firm fix a position to avoid the location silk to drop and the aversion phenomenon.

Description

Pulmonary nodule positioning device

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a pulmonary nodule positioner.

Background

With the wide application of low-dose spiral CT in pulmonary nodule screening, the detection rate of pulmonary nodules is obviously improved, pulmonary nodule resection under a television thoracoscope (VATS) is an effective diagnosis and treatment operation at present, but for pulmonary nodules with the diameter smaller than 10mm or the distance from the pleura larger than 5mm, visual observation is adopted in the television thoracoscope pulmonary nodule resection, finger touch is difficult to accurately position, and inaccurate positioning causes the risks of increased lesion resection difficulty, overlarge resection range, prolonged operation time, increased lung tissue injury and the like, so in order to more accurately resect lesions in the operation, the accurate positioning of the preoperative pulmonary nodules is more important.

Currently, a common device for preoperative lung nodules at home and abroad is a hooked wire (Hook-wire) positioning device. The hooked wire (Hook-wire) end of the device has only 1 inverted positioning Hook, and the risk of the positioning Hook shifting and falling off is easy to occur due to respiratory motion of the lung.

SUMMERY OF THE UTILITY MODEL

In view of the above analysis, the present invention aims to provide a pulmonary nodule positioning device for solving the technical problem that the positioning wire is easy to shift and fall off due to the insecure positioning of the existing pulmonary nodule positioning device.

The purpose of the utility model is mainly realized through the following technical scheme:

the utility model provides a pulmonary nodule positioning device, which comprises a positioning wire and a guide needle, wherein the positioning wire can be inserted into and withdrawn from the guide needle;

the positioning wire is a rigid positioning wire and comprises a positioning core wire, the positioning core wire comprises a positioning hook and a rigid core wire, the positioning hook is arranged at one end of the rigid core wire, and the positioning hook and the rigid core wire are integrally formed.

In one possible design, the positioning hook includes a first curved structure including a first hook and a second curved structure including a third hook and a fourth hook;

the third hook and the first hook are integrally formed and have opposite bending directions, the fourth hook and the second hook are integrally formed and have opposite bending directions, and the first hook and the second hook are in a bending line state;

the third hook and the fourth hook are in a bent line or bent line state.

In one possible design, the positioning core wire is provided with a positioning mark, a depth prompting mark, an anti-bending supporting tube and a release mark which are adjacent in sequence;

the positioning mark is used for enhancing the developing performance of the positioning hook under CT.

In one possible design, the depth prompting mark and the anti-bending supporting tube are both touchable annular tubes, and the depth prompting mark and the anti-bending supporting tube are sleeved on the positioning core wire.

In one possible design, the release flag is used to determine whether the guidewire is withdrawn from the introducer needle.

In one possible design, the depth cue marks are spaced every 10mm of dimensional depth, and the number of depth marks increases by 1 for every 10mm of depth of penetration depth increase compared to the number of previous depth marks.

In one possible design, the introducer needle includes an introducer needle cannula and an introducer needle handle;

the guide needle tube comprises a tube body and a guide needle point which are integrally formed, the guide needle point is arranged at one end of the tube body, and scale marks are arranged on the tube body.

In one possible design, a needle tip bevel of the guide needle is arranged on the needle tip of the guide needle, the needle tip bevel of the guide needle comprises a first puncture bevel and a second puncture bevel, the first puncture bevel is arranged at one end far away from the needle tube body, the second puncture bevel is adjacent to the needle tube body, and the first puncture bevel and the second puncture bevel are not coplanar.

In one possible design, the first puncture inclined plane is a semi-annular inclined plane, the second puncture inclined plane is a V-shaped inclined plane, the opening directions of the semi-annular inclined plane and the V-shaped inclined plane are oppositely arranged, and the semi-annular inclined plane and the V-shaped inclined plane form a closed loop structure;

in the direction far away from the first puncture inclined plane, the bottom of the V-shaped inclined plane is a puncture tip which is gradually reduced.

In one possible design, the guide needle handle is provided with a guide needle point bevel face mark; the bevel of the tip of the introducer needle is marked as a concave structure or a convex structure.

Compared with the prior art, the utility model discloses can realize one of following beneficial effect at least:

(1) The utility model can increase the positioning reliability by arranging the first bending structure and the second bending structure, thereby effectively reducing the risk of falling off and shifting of the positioning wire caused by respiratory motion of the lung and finally avoiding the displacement or falling off of the positioning wire; on the other hand, the utility model discloses a first curved structure has opposite direction with the curved structure of second, and the location hook can restrict the removal of location core silk in two directions to increase the firm degree in location.

(2) The utility model discloses a contained angle of control first plane and location core silk axis and the contained angle of second plane and location core silk axis can guarantee that the hook is less at the square ascending height in location core silk axis to make things convenient for the narrowing, make the dynamics of narrowing simultaneously little.

The utility model discloses in, can also make up each other between the above-mentioned each technical scheme to realize more preferred combination scheme. 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 will be realized and attained by the structure 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, wherein like reference numerals are used to designate like parts throughout the drawings.

FIG. 1 is a schematic view of a lung nodule locator (after the locating wire is pushed out of the needle cannula of the introducer needle);

FIG. 2 is a schematic view of the guidewire inside the introducer needle cannula;

FIG. 3 isbase:Sub>A schematic cross-sectional view A-A of the guidewire inside the introducer needle cannula;

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

FIG. 5 is a schematic structural diagram of a positioning wire 1;

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

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

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

fig. 9 is a partial enlarged view of portion B of fig. 8;

FIG. 10a is a schematic view of the tip of an introducer needle 1;

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

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

FIG. 11a is a schematic view of the structure of the tip of the introducer needle according to 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 the structure of the positioning core wire 1;

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

FIG. 14a is a schematic structural view of a first bend structure;

FIG. 14b is a schematic view of a buffer zone between the first bend configuration and the rigid core wire;

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

FIG. 15b is a schematic view of the configuration of the angle formed by the first hook and the second hook of the positioning hook, respectively, with the axis of the rigid core wire;

FIG. 16 is a schematic view of the structure of the positioning hook as it is being helically raised about the rigid core wire 1;

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

FIG. 17b is a schematic view of the positioning hook as it rises helically around the rigid core wire 3;

FIG. 18 is a schematic structural view of a second bend configuration, FIG. 1;

FIG. 19 is a schematic structural view of a second bend configuration, FIG. 2;

fig. 20 is a structural schematic view 3 of a second bent structure.

Reference numerals:

1-a guide needle; 11-a guide needle cannula; 111-a guide needle tip; 1111-a first puncture bevel; 1112-a second puncture bevel; 112-guide needle scale markings; 12-an introducer needle handle; 121-direction of the needle tip bevel of the guide needle to the mark; 2-positioning wires; 21-a localization marker; 22-depth cue marker; 23-an anti-bending support tube; 24-a release label; 25-positioning the core wire; 251-a positioning hook; 2511-a first bend configuration; 2512-a second bend configuration; 2513-first hook; 2514-second hook; 2515-third hook; 2516-fourth hook; 252-rigid core wire; 26-a first curved buffer zone; 27-second curved buffer zone.

Detailed Description

The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of the invention, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit the scope of the invention.

The utility model provides a lung nodule positioning needle, as shown in fig. 1, fig. 2 and fig. 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 consists of a first hook 2513 and a second hook 2514; a plane where the first hook 2513 is located is defined as a first plane, and a plane where the second hook 2514 is located is defined as a second plane; the first plane, the second plane and the axis of the positioning core wire 25 are all not coplanar with one another.

Specifically, the positioning hook 251 of the present invention includes a first curved structure 2511, the first curved structure 2511 includes a first hook 2513 and a second 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 material after being folded, and two ends of the wire material 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, so that the relatively strong 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 in half from the middle, forming the wire in parallel at a position near the middle of the wire (the middle position before folding), forming the wire in spiral cross at positions near both ends of the wire (the both ends before folding), and forming a first hook 2513 and a second hook 2514 at both ends of the wire.

The locating hook among the prior art sets up with the plane, and structural style is single, and the tissue volume of snatching is few, leads to the locating hook to drop easily, the locating hook shifts, and then leads to the location failure, leads to needing many times to fix a position, leads to patient's tissue damage great, and it is more to bleed. In addition, the existing coplanar positioning hook has larger needle feeding (retracting) force. Because the force of the coplanar positioning hook is determined by the included angle between the plane of the positioning hook 251 and the axis of the positioning core wire 25 when the needle is fed (retracted), when the included angle is 0 degree, namely the axis of the positioning hook 251 and the axis of the positioning core wire 25 are in a coplanar structure, the bending height of the positioning hook 251 is higher, and the force required for needle feeding and retracting is larger.

It should be noted that, in one aspect, the first hook 2513, the second hook 2514 and the positioning core wire 25 axis of the present invention are not coplanar with each other, i.e., the positioning hook 251 and the core wire axis are at an angle, and the first hook 2513 and the second hook 2514 are not on the same plane. Compared with the prior art, the utility model discloses can increase the tissue volume of anchoring, the difficult phenomenon that takes place location hook 251 to drop and shift, and then can avoid the phenomenon of many times location. On the other hand, because the utility model discloses a location hook 251 and rigidity core silk 252 axis become certain contained angle, at first, in the height of location hook 251, will be less than current with planar structure, secondly, location hook 251 and core silk axis become certain angle, have in other words had one crooked buffering area more between rigidity core silk 252 axis and first curved structure 2511 for when carrying out the operation of inserting the needle under equal dynamics, the utility model discloses a location hook 251 has less dynamics when narrowing. Can be convenient for the doctor to operate, and can repeat the location many times.

The utility model discloses a contained angle of first plane and location core silk 25 axis is alpha, and the contained angle of second plane and location core silk 25 axis is beta, and 0 < alpha <60, 0 < beta < 60.

Compared with the prior art, through the contained angle of control first plane and location core silk 25 axis and the contained angle of second plane and location core silk 25 axis, can guarantee that location hook 251 is less at the square ascending height in location core silk 25 axial to make things convenient for the narrowing, make the dynamics of narrowing simultaneously little.

It should also be noted that, in order to further reduce the narrowing force, the present invention provides 10 ° < α <45 °,10 ° < β <45 °.

For example, as shown in fig. 14a and 14b, when the first hooks 2513 and the second hooks 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 it is possible to separate the first hooks 2513 and the second hooks 2514 on the same side of the plane), the first hooks 2513 are formed such that the first plane is at an angle α 1 to the axis of the positioning core wire 25, and the second hooks 2514 are formed such that the second plane is at an angle β 1,0 ° < α 1 > <60 °,0 ° < β 1 > <60 °, further, 10 ° < α 1 > <45 °,10 ° < β 1 ° 45 °.

As shown in fig. 15a and 15b, when the first hooks 2513 and the second hooks 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 the first hooks 2513 and the second hooks 2514 are spaced on both sides of the plane), the first plane formed by the first hooks 2513 is at an angle α 2 to the axis of the positioning core wire 25, and the second plane formed by the second hooks 2514 is at an angle β 2,0 ° < α 2 to 60 °,0 ° < β 2 to 60 °, further, 10 ° < α 2 to 45 °,10 ° < β 2 to 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 utility model discloses a set up first crooked buffering area and the crooked buffering area of second, can further reduce the dynamics of narrowing down to make things convenient for the operator to narrow down.

It should be noted that the positioning wire 2 of the present invention is a rigid positioning wire 2; the positioning hook 251 is provided at one end of the positioning core wire 25, and the positioning core wire 25 and the positioning 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, and the risk of breakage at the connection is easy to occur.

Compared with the prior art, the utility model ensures the strength of the positioning core wire 25, and can not cause the fracture phenomenon of the positioning core wire 25; in addition, the positioning core wire 25 and the positioning hook 251 are integrally formed, no connection part exists between the positioning core wire 25 and the positioning core wire 251, breakage between the positioning hook 251 and the positioning core wire 25 can be avoided, and falling risk is reduced.

It should be noted that the first hook 2511 of the present invention is a spiral loop structure, and as shown in fig. 16, 17a and 17b, the first hook 2513 and/or the second hook 2514 is in a spiral loop ascending state around the axis of the positioning core wire 25. The first hook 2513 and/or the second hook 2514 rise up by 1 or less turns around the axis of the positioning core wire 25.

Specifically, the utility model discloses a spiral encircles ascending structure includes following two kinds of condition: in the first case, one of the first hook 2513 and the second hook 2514 rises spirally 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 rising state around the axis of the positioning core wire 25.

Compared with the prior art, the first hook 2513 and the second hook 2514 spirally rise around the positioning core wire 25, which is helpful for generating spiral surrounding force on lesion tissues after the positioning needle is released, thereby increasing the positioning firmness.

As shown in fig. 18 to 20, the positioning hook 251 further includes a second hook structure 2512, and the second hook 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 third hook 2515 is bent in a direction opposite to the first hook 2513, and the fourth hook 2516 is bent in a direction opposite to the second hook 2514. The third hook 2515 and the fourth hook 2516 may be in a bent state or in a bent state.

Additionally, as shown in fig. 18 and 19, the third and fourth hooks 2515 and 2516 are positioned proximate to the positioning core wire 25 or distal to the positioning core wire 25, or, as shown in fig. 20, the third and fourth hooks 2515 and 2516 pass over the axis of the rigid core wire 252 and then are bent back again.

The positioning needle in the prior art has a single structure, and the area and the volume for grabbing focal tissues are not large enough, so that the focal tissues are not firm after being fixed. In addition, the number of the claws of the existing positioning needle is one claw or multiple claws, particularly a multi-claw structure, so that the injury of the lung tissue of a patient is easily increased in the puncture positioning process, the bleeding is increased, and the multiple claws are easily cut off and are reserved in the lung.

Compared with the prior art, on one hand, the utility model can increase the positioning reliability by arranging the first and second curved structures 2511 and 2512, thereby effectively reducing the risk of falling off and shifting of the positioning wire 2 caused by respiratory motion of the lung and finally avoiding the displacement or falling off of the positioning wire 2; on the other hand, the first curved structure 2511 and the second curved structure 2512 of the present invention have opposite directions, and the positioning hook 251 can limit the movement of the positioning core wire 25 in two 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 cue mark 22, an anti-bending support tube 23 and a release mark 24 which are adjacent in sequence; the depth prompt mark 22 and the anti-bending support tube 23 are both 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 provided 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 (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 the positioning needle falls off in lung tissues due to the separation and fracture phenomena.

Compared with the prior art, the utility model discloses a location silk 2 adopts rigidity location silk 2, location hook 251 and rigidity core silk 252 integrated into one piece on the location core silk 25, and both constitute by the silk material, do not have the junction between location core silk 25 and the location hook 251, and the bulk strength of location silk 2 is high, and difficult bending deformation and fracture, consequently, the utility model discloses can avoid taking place the risk of fracture separation between location core silk 25 and the location hook 251.

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

Compared with the prior art, the utility model discloses a pilot pin only includes two big structures of guide needle 1 and pilot wire 2 and constitutes, simple structure to when using, easy operation can shorten operation time, reduces patient's damage.

As shown in fig. 12, the positioning wire 2 according to 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 (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 utility model discloses a pilot pin includes pilot wire 2 and guide pin 1, and pilot wire 2 can insert and release inside the guide pin 1.

In the prior art, color bands with different colors are dyed on a core wire, the adopted color bands are easily dyed red by blood and cannot be identified, and the identification degree of the color bands is not as obvious as that of an annular metal tube. And in depth, once the core wire is stained red by blood, the depth cannot be identified.

Compared with the prior art, the utility model discloses a degree of depth suggestion mark 22 on the location core silk 25 has following effect: (1) By providing the depth cue markers 22 on the positioning core wire 25, the operator can determine the depth of the lesion based on the location and number of depth markers. (2) The utility model discloses a degree of depth suggestion mark 22 is owing to adopt tangible annular tube, can avoid because being dyed by blood and unable discernment, even if there is the condition dyed by blood, operating personnel still can discern the degree of depth of pulmonary nodule through the mode of touch, consequently, this degree of depth suggestion mark 22 can not influenced by blood, is difficult to be dyed by blood, differentiates and discerns easily. (3) Even if stained, the depth of the lung nodule (lesion) can be determined by touch.

It should be noted that the depth cue mark 22 may be made of a developable metal material, such as stainless steel, tantalum metal, platinum-iridium alloy, etc., so as to facilitate development during the puncture or resection.

The utility model is provided with the positioning mark 21 on the positioning wire 2, and the positioning mark 21 adopts a touchable annular tube, on one hand, the developing performance of the positioning hook 251 under CT can be enhanced, and the position of pulmonary nodule can be determined; on the other hand, when a lung nodule is resected, the location hook 251 is positioned using the palpation loop.

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

The utility model discloses the purpose that sets up anti-bending stay tube 23 is: stress concentration received when reducing the release of locating wire 2, strengthen the intensity of location core wire 25 in the release in-process, guarantee that locating wire 2 is difficult to take place bending deformation in the propelling movement in-process.

It should be noted that the positioning mark 21, the depth indication mark 22, the anti-bending support 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 prompting mark 22, the anti-bending support tube 23, the release mark 24 and the positioning core wire 25 are made of metal materials, such as stainless steel materials, metal tantalum and platinum-iridium alloy materials.

The utility model discloses a location hook 251 is the double hook structure, through reducing location hook 251 quantity, can reduce the damage to lung tissue, reduces the risk of bleeding.

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

In the prior art, hook-wire (Hook-wire) is adopted to position the position of a pulmonary nodule, the tail end of the Hook-wire adopted by the method has no scale mark, the depth of a focus cannot be determined, the resection range is large easily in the surgical resection process, the wire is cut off and remains in the lung, and other risks are avoided. Compared with the prior art, the utility model discloses a set up the scale mark in the needle tubing main part, make the operator can know the needle insertion degree of depth directly perceived when using the pilot pin.

In order to reduce the puncture resistance and reduce the injury to the patient, as shown in fig. 10a to 10c and fig. 11a, the utility model discloses a guide needle point 111 is provided with a guide needle point inclined plane, the guide needle point inclined plane includes a first puncture inclined plane 1111 and a second puncture inclined plane 1112, the first puncture inclined plane 1111 is provided at the end far away from the needle tube body, the second puncture inclined plane 1112 is adjacent to the needle tube body, the first puncture inclined plane 1111 is not coplanar with the second puncture inclined plane 1112; 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 opposite; in the direction away from the first piercing ramp 1111, the bottom of the V-shaped ramp is a tapered piercing tip.

As shown in fig. 11b and 11c, the puncture needle of the prior art is provided with only one puncture bevel, and the puncture tip is wide, which results in high puncture resistance and serious injury to the patient. Compared with the prior art, the utility model discloses a set up first puncture inclined plane 1111 and second puncture inclined plane 1112, can reduce the length on puncture inclined plane (with the current comparison that sets up a puncture inclined plane) through setting up second puncture inclined plane 1112, reduce the duration of puncture power, reduce the risk that patient bleeds. In addition, the first puncture inclined plane 1111 is provided with a puncture tip, and the puncture tip can effectively reduce puncture resistance and puncture injury.

In order to further reduce the puncture resistance and further reduce the risk of bleeding from the lung tissue, as shown in fig. 9, the included angle between the second puncture inclined plane 1112 and the axis of the needle tube main body is α,10 ° < α <20 °.

It should be noted that, the needle handle 12 of the present invention is provided with a needle point slope orientation mark 121, and the needle point slope orientation mark 121 is a concave structure or a convex structure, and is provided with corresponding bright and bright display for marking the orientation of the needle point slope of the guide needle.

Compared with the prior art, the utility model discloses a set up guide needle tubing inclined plane orientation mark on guide needle handle 12, make things convenient for the operator in the operation directly to judge the orientation on guide needle tubing inclined plane, the selection of convenient adjustment location silk 2 release directions.

In order to determine the depth of the lesion, as shown in fig. 5 and 6, the depth cue markers 22 of the present invention are spaced every 10mm in size and depth, and the number of depth markers is increased in a manner of doubling every 10mm in distance, i.e., the number of depth markers is increased by 1 for every 10mm in depth, compared to the previous depth marker.

Specifically, the depth cue marks 22 are arranged and distributed at an interval distance of 10mm, at most, 5 sections are arranged, and the number of the depth cue marks 22 is increased by corresponding multiples according to the distance multiples.

To sum up, the utility model provides a pulmonary nodule positioning needle which can firmly fix the focus tissue, clearly position the focus tissue and determine the depth of the focus tissue.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims (10)

1. A pulmonary nodule locating device comprising a locating wire and an introducer needle, the locating wire being insertable and retractable from within the introducer needle;

the positioning wire is a rigid positioning wire and comprises a positioning core wire, the positioning core wire comprises a positioning hook and a rigid core wire, the positioning hook is arranged at one end of the rigid core wire, and the positioning hook and the rigid core wire are integrally formed.

2. The pulmonary nodule positioning apparatus of claim 1, wherein the positioning hook comprises a first curved structure comprising a first hook and a second curved structure comprising a third hook and a fourth hook;

the third hook and the first hook are integrally formed and have opposite bending directions, and the fourth hook and the second hook are integrally formed and have opposite bending directions;

the first hook and the second hook are in a bent line state;

the third hook and the fourth hook are in a bent line or bent line state.

3. The pulmonary nodule positioning device according to claim 1, wherein the positioning core wire is provided with a positioning mark, a depth cue mark, an anti-bending support tube and a release mark which are adjacent in sequence;

the positioning mark is used for enhancing the developing performance of the positioning hook under CT.

4. The pulmonary nodule positioning apparatus of claim 3, wherein the depth cue marker and the anti-kink support tube are touchable annular tubes, and both are sleeved on the positioning core wire.

5. The pulmonary nodule localization apparatus of claim 4, wherein the release marker is used to determine whether a localizing wire is withdrawn from within the introducer needle.

6. The pulmonary nodule localization apparatus of claim 5, wherein the depth cue markers are spaced at 10mm depth of dimension, and the number of 1 depth marker is increased for each 10mm depth increase in penetration depth compared to the number of previous depth markers.

7. The pulmonary nodule localization apparatus of claim 6, wherein the introducer needle comprises an introducer needle cannula and an introducer needle handle;

the guide needle tube comprises a tube body and a guide needle point which are integrally formed, the guide needle point is arranged at one end of the tube body, and scale marks are arranged on the tube body.

8. The pulmonary nodule positioning apparatus of claim 7, wherein the introducer needle tip has an introducer needle tip bevel comprising a first puncture bevel disposed at an end distal from the needle cannula body and a second puncture bevel adjacent to the needle cannula body, the first puncture bevel and the second puncture bevel being non-coplanar.

9. The pulmonary nodule positioning apparatus of claim 8, wherein the first puncture bevel is a semi-circular bevel and the second puncture bevel is a V-shaped bevel, and the openings of the semi-circular bevel and the V-shaped bevel are oppositely arranged to form a closed loop;

in the direction far away from the first puncture inclined plane, the bottom of the V-shaped inclined plane is a puncture tip end which is gradually reduced.

10. The pulmonary nodule locating apparatus of claim 9, wherein the introducer needle handle is provided with an introducer needle tip bevel orientation mark; the needle point bevel of the guide needle is marked to be a concave structure or a convex structure.

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