Nodule localization needle

Abstract

The application relates to the technical field of medical devices, in particular to a nodule positioning needle which comprises a positioning needle tube and a push rod, a needle tube seat is arranged at the rear end of the positioning needle tube, a through hole communicating with the positioning needle tube is arranged on the needle tube seat, the push rod extends into the positioning needle tube through the through hole on the needle tube seat, a positioning assembly is arranged in the positioning needle tube at the front end of the push rod, the positioning assembly comprises a positioning rope, a limiting sleeve and a spring, a thimble is arranged on the limiting sleeve, the front end of the positioning rope passes through the limiting sleeve below the thimble, passes through the inner hole of the spring and then passes out of the limiting sleeve above the thimble again, a first limiting knot limiting the upward movement of the positioning rope is arranged at the rear end of the positioning rope below the thimble, the front end of the positioning rope below the limiting sleeve extends to the outside of the push rod downwards, the front end of the positioning rope is pulled, and the spring forms a ring to realize positioning. The positioning needle has better anchoring force and is more firmly positioned on the tissue.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a nodule positioning needle. BACKGROUND

[0002] At present, the positioning of pulmonary nodules mostly adopts the mode of barb-shaped guide wire or micro-spring ring; for example, a pulmonary small nodule positioning guide wire disclosed in patent No. CN2014108006630.7 is hung on the pulmonary tissue through the barb of the front segment of the guide wire, and a pulmonary nodule positioning needle disclosed in patent No. CN202121607690.9 is hung on the pulmonary tissue for positioning through the spring structure formed by the densely winding of the front end of the guide wire.

[0003] The barb-shaped guide wire is very easy to form a knife blade structure due to the very thin barb, and is easily slipped out of the tissue, and the micro-spring ring structure is free to form in the tissue due to the softness of the spring itself, and in particular when the spring is not fully opened, the anchoring force is insufficient, and the probability of disengagement from the pulmonary tissue is increased, and once disengaged, the positioning and resection surgery will fail. Therefore, it is urgent to develop a nodule positioning needle with sufficient anchoring force. SUMMARY

[0004] The purpose of the present application is to solve the above-mentioned deficiencies of the prior art, and to provide a nodule positioning needle which can ensure the anchoring force of the pulmonary nodules and more firmly position on the tissue.

[0005] The technical solution adopted by the present application to solve the technical problems is:

[0006] A nodule positioning needle, comprising a positioning needle tube and a push rod, wherein the rear end of the positioning needle tube is provided with a needle tube seat, the needle tube seat is provided with a through hole communicating with the positioning needle tube, the front end of the push rod extends into the positioning needle tube through the through hole of the needle tube seat, a positioning assembly is placed in the positioning needle tube at the front end of the push rod, the positioning assembly comprises a positioning rope, a limiting sleeve and a spring, the limiting sleeve is provided with a thimble, the front end of the positioning rope passes through the limiting sleeve below the thimble, passes through the inner hole of the spring and then passes out of the limiting sleeve above the thimble, the rear end of the positioning rope below the thimble is provided with a first limiting knot which limits the upward movement of the positioning rope, and the front end of the positioning rope below the limiting sleeve extends to the outside of the push rod, the front end of the positioning rope is pulled, the spring forms a ring to achieve positioning. Through the design of the positioning assembly, the positioning needle tube is inserted into the position of the nodule needing treatment, the push rod pushes out the positioning assembly, the front end of the positioning rope extending from the push rod is pulled, the positioning rope pulls the spring into a ring due to the limitation of the first limiting knot, and the ring spring is positioned on the pulmonary tissue. The ring spring belongs to passive deformation, and the anchoring force is effectively improved compared with the single spring structure of free deformation.

[0007] The outer diameter of the spring is greater than the inner diameter of the thimble.

[0008] The jack is divided into the first jack and the second jack arranged side by side, the front end of the positioning rope is sequentially threaded through the first jack and the inner hole of the spring, and is threaded out from below the second jack, and the first limiting section is arranged below the first jack to limit the upward movement of the positioning rope.

[0009] The lower end of the first jack and the second jack is provided with a lower limiting slot, the lower limiting slot is communicated with the first jack and the second jack, the first limiting section and the positioning rope threaded out of the second jack are extruded in the lower limiting slot to realize the annular shaping of the spring.

[0010] The upper end of the first jack and the second jack is provided with an upper limiting slot, the upper limiting slot is communicated with the first jack and the second jack, the positioning rope threaded through the inner hole of the spring is provided with a second limiting section, and the second limiting section is extruded in the upper limiting slot to realize the annular shaping of the spring.

[0011] The positioning rope is threaded in at any position of the front end or the front end part of the spring and is threaded out at any position of the rear end part or the rear end of the spring, the front end of the positioning rope is pulled, the spring is bent to form an annular structure or an annular structure with side claws.

[0012] The first limiting section is a knot fixed on the positioning rope, and the size of the first limiting section is greater than the inner diameter of the first jack.

[0013] The second limiting section is a knot fixed on the positioning rope, and the size of the second limiting section is greater than the inner diameter of the second jack.

[0014] The positioning rope is provided with a developing mark for displaying the depth of the positioning mechanism inserted into the organ tissue, the developing mark is a developing line segment with a length of 0.2-0.5 cm, and a developing line segment is arranged every 0.5-1 cm on the positioning rope threaded through the spring.

[0015] The positioning needle tube is designed to intervene in the treatment of nodules, the push rod pushes out the positioning assembly, the front end of the positioning rope is pulled, the positioning rope pulls the spring into an annular shape due to the limiting effect of the first limiting section, the annular spring is positioned on the lung tissue, the annular spring is passively deformed, the anchoring force is effectively improved, and the annular spring is more firmly positioned on the tissue. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a sectional view of the present application;

[0017] Figure 2 is a structural view of the positioning assembly in the present application;

[0018] Figure 3 is a structural view of the positioning assembly when positioning in the present application, wherein 3-1 is a ring-shaped spring, 3-2 and 3-3 are ring-shaped springs with side claws on one side, and 3-4 is a ring-shaped spring with side claws on both sides;

[0019] Figure 4 is a structural view of the limiting sleeve, wherein 4-1 is the positioning rope squeezed in the limiting sleeve, 4-2 is the spring front and rear end wound above the limiting sleeve, 4-3 is the first limiting section and the positioning rope squeezed in the lower limiting slot of the limiting sleeve, and 4-4 is the second limiting section squeezed in the upper limiting slot of the limiting sleeve.

[0020] Reference signs: 1, positioning needle tube; 2, push rod; 3, needle tube seat; 4, positioning assembly; 41, positioning rope; 42, limiting sleeve; 421, first insertion hole; 422, second insertion hole; 423, lower limiting slot; 424, upper limiting slot; 43, spring; 44, first limiting section; 45, second limiting section; 46, side claw; 5, developing mark. DETAILED DESCRIPTION

[0021] In order for those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the present application will be described clearly and completely below in combination with the drawings. Other embodiments obtained by those skilled in the art without making creative efforts shall all belong to the protection scope of the present application.

[0022] As Figures 1 to 3As shown, the present application provides a nodule positioning needle, which comprises a positioning needle tube 1 and a push rod 2, the rear end of the positioning needle tube 1 is provided with a needle tube seat 3, the needle tube seat 3 is provided with a through hole in communication with the positioning needle tube 1, the front end of the push rod 2 extends into the positioning needle tube 1 through the through hole on the needle tube seat 3, the front end of the push rod 2 is provided with a positioning assembly 4 in the positioning needle tube 1, the positioning assembly 4 comprises a positioning rope 41, a limiting sleeve 42 and a spring 43, the limiting sleeve 42 is provided with a insertion hole, the outer diameter of the spring 43 is greater than the inner diameter of the insertion hole, the front end of the positioning rope 41 passes through the limiting sleeve 42 below the insertion hole and then passes through the inner hole of the spring 43 and then passes out of the limiting sleeve 42 above the insertion hole, the rear end of the positioning rope 41 below the insertion hole is provided with a first limiting knot 44 for limiting the upward movement of the positioning rope 41, the front end of the positioning rope 41 below the limiting sleeve 42 extends out of the push rod 2, the front end of the positioning rope 41 is pulled, the spring 43 forms a ring shape to realize positioning.

[0023] Through the design of the positioning assembly 4, the positioning needle tube 1 is inserted into the position of the nodule needing treatment, the push rod 2 pushes out the positioning assembly 4, the front end of the push rod 2 abuts against the limiting sleeve 42, at this time, the positioning rope 41 extending out of the push rod 2 is pulled, because of the limiting effect of the first limiting knot 45 on the rear end of the positioning rope 41, the positioning rope 41 drives the spring 43 to bend and move, until the upper end of the spring 43 is pulled to the limiting sleeve 42, because the outer diameter of the spring 43 is greater than the inner diameter of the insertion hole, the spring 43 is clamped above the limiting sleeve 42 to form a ring-shaped spring, at this time, if the push rod 2 is pulled out of the positioning needle tube 1, the positioning rope 41 will be pulled out of the positioning needle tube 1, and the spring 43 will be pulled out of the limiting sleeve 42, and the positioning rope 41 will be pulled out of the push rod 2, and the positioning rope 41 will be pulled out of the push rod 2. Figure 4-1 As shown, because the positioning rope 41 upwardly penetrating into the insertion hole and the positioning rope 41 downwardly penetrating out of the insertion hole are pressed against each other in the insertion hole of the limiting sleeve 42, the spring 43 is shaped and positioned on the lung tissue, and the ring-shaped spring 43 is passively deformed, so that the anchoring force of the single spring structure is effectively improved, and the ring-shaped spring 43 is more firmly positioned on the tissue.

[0024] As shown, Figure 4-2 The insertion hole is divided into a first insertion hole 421 and a second insertion hole 422 arranged side by side, the front end of the positioning rope 41 passes through the first insertion hole 421 and the inner hole of the spring 43 in sequence and then passes out of the limiting sleeve 42 below the second insertion hole 422, the first limiting knot 44 is arranged below the first insertion hole 421 to limit the upward movement of the positioning rope 41; the first limiting knot 44 is a knot fixed on the positioning rope 41, and the size of the first limiting knot 44 is greater than the inner diameter of the first insertion hole 421. At this time, the positioning rope 41 extending out of the push rod 2 is pulled, and the spring 43 forms a ring-shaped spring above the limiting sleeve 42, the two ends of the spring 43 above the limiting sleeve 42 are wound together due to mutual pressing, so as to complete the ring-shaped shaping of the spring 43.

[0025] AsFigure 4-3 As shown, the lower end of the first socket 421 and the second socket 422 is provided with a lower limit slot 423. The lower limit slot 423 is connected to the first socket 421 and the second socket 422. The first limit segment 44 and the positioning rope 41 that passes through the second socket 422 are squeezed in the lower limit slot 423 to achieve the ring-shaped shaping of the spring 43.

[0026] like Figure 4-4 As shown, the upper end of the first socket 421 and the second socket 422 is provided with an upper limit slot 424. The upper limit slot 424 is connected to the first socket 421 and the second socket 422. The positioning rope 41 passing through the inner hole of the spring 43 is provided with a second limiting joint 45. The second limiting joint 45 is a knot fixed on the positioning rope 41. The size of the second limiting joint 45 is larger than the inner diameter of the second socket 422. The second limiting joint 45 is pressed into the upper limit slot 424 to achieve the ring shape of the spring 43.

[0027] The positioning rope 41 passes through any position of the front end or front part of the spring 43, and then exits through any position of the rear end or rear end of the spring 43. Pulling the front end of the positioning rope 41 causes the spring 43 to bend into a loop or a loop structure with side claws 46. Figure 3-1 As shown, when the positioning rope 41 passes through the front end of the spring 43 and exits from the rear end of the spring 43, pulling the front end of the positioning rope 41 causes the spring 43 to solidify into a ring spring, as shown. Figure 3-2 As shown, when the positioning rope 41 passes through the front end of the spring 43 and exits from the rear end of the spring 43, pulling the front end of the positioning rope 41 causes the spring 43 to solidify into a ring spring with a side claw 46 on one side, as shown. Figure 3-3 As shown, when the positioning rope 41 passes through the front end of the spring 43 and exits from the rear end of the spring 43, pulling the front end of the positioning rope 41 causes the spring 43 to solidify into a ring spring with a side claw 46 on one side, as shown. Figure 3-4 As shown, when the positioning rope 41 passes through the front end of the spring 43 and exits from the rear end of the spring 43, and the front end of the positioning rope 41 is pulled, the spring 43 is shaped into a ring spring with side claws 46 on both sides. When it is shaped into a ring structure with side claws 46, the side claws 6 can further improve the positioning and anchoring force of the entire ring spring, ensuring that it is more effectively positioned on the lung tissue.

[0028] Preferred, Figure 3-2In the 3-4, the ratio of the length of the spring 43 in the ring shape to the length of the side claw 46 is 5:2, the length of the spring 43 in the ring shape is 10-15 mm, and the length of the side claw 46 is 4-6 mm. After the spring 43 is in the ring shape, the diameter of the ring spring is 3-5 mm. The length of the side claw 46 is similar to the diameter of the ring spring after the spring 43 is in the ring shape, and the anchoring force generated by the side claw 46 is similar to the ring spring, so the effective anchoring range formed thereby can be effectively increased. The spring type anchoring of the present scheme can be well anchored in the tissue and will not fall out.

[0029] The positioning rope 41 has a developing mark 5 for showing the depth of the positioning mechanism 4 inserted into the tissue of the organ. The developing mark 5 is a developing line segment with a length of 0.2-0.5 cm, and a developing line segment is arranged on the positioning rope 41 passing through the spring 43 every 0.5-1 cm. The developing mark 5 can be a barium sulfate coating, which can be developed under X-ray irradiation, thereby facilitating the doctor to observe the depth of the positioning assembly 4 into the lung tissue.

[0030] When the technical scheme is implemented, the doctor inserts the positioning needle tube 1 into the position of the nodule to be treated, pushes the positioning assembly 4 out of the push rod 2, and abuts the front end of the push rod 2 against the limiting sleeve 42. At this time, the positioning rope 41 outside the push rod 2 is pulled, and the spring 43 is bent and moved under the driving of the positioning rope 41, until the front end of the spring 43 abuts against the upper part of the limiting sleeve 42, as shown in the four spring shaping modes. Figure 4 The spring 43 is in the ring shape, and the ring spring 43 is positioned on the lung tissue, and the implantation process of the positioning assembly 4 is completed. When the minimally invasive surgery is needed, the doctor can cut the tissue in the depth range of the positioning assembly 4 according to the depth information shown by the positioning rope 41, and complete the surgery.

Claims

1. A nodule positioning needle comprising a needle tube and a push rod, a needle tube base is installed at the rear end of the needle tube, a through hole is arranged on the needle tube base and communicates with the needle tube, the front end of the push rod extends into the needle tube through the through hole on the needle tube base, characterized in that: The positioning needle tube at the front end of the push rod is provided with a positioning assembly, the positioning assembly comprises a positioning rope, a limiting sleeve and a spring, the limiting sleeve is provided with a insertion hole, the front end of the positioning rope passes through the limiting sleeve below the insertion hole, and then passes through the inner hole of the spring and then passes out of the limiting sleeve above the insertion hole, the rear end of the positioning rope below the insertion hole is provided with a first limiting knot for limiting the upward movement of the positioning rope, and the front end of the positioning rope below the limiting sleeve extends to the outside of the push rod, the front end of the positioning rope is pulled, and the spring is annular to realize positioning.

2. A nodule localizing needle according to claim 1, wherein: The insertion hole is divided into the first insertion hole and the second insertion hole arranged side by side, the front end of the positioning rope passes through the first insertion hole and the inner hole of the spring in sequence, and then passes out of the second insertion hole below, and the first limiting knot is arranged below the first insertion hole to limit the upward movement of the positioning rope.

3. A nodule localizing needle according to claim 2, wherein: Lower limiting slots are arranged at the lower ends of the first insertion hole and the second insertion hole, the lower limiting slots are communicated with the first insertion hole and the second insertion hole, the first limiting knot and the positioning rope passing out of the second insertion hole are pressed in the lower limiting slots to realize the annular shaping of the spring.

4. The nodule localizing needle of claim 2, wherein: Upper limiting slots are arranged at the upper ends of the first insertion hole and the second insertion hole, the upper limiting slots are communicated with the first insertion hole and the second insertion hole, the positioning rope passing through the inner hole of the spring is provided with a second limiting knot, and the second limiting knot is pressed in the upper limiting slots to realize the annular shaping of the spring.

5. The nodule localizing needle of claim 1, wherein: The positioning rope passes in at any position of the front end or the front end part of the spring and then passes out of any position of the rear end part or the rear end of the spring, the front end of the positioning rope is pulled, and the spring is bent to form an annular structure or an annular structure with side claws.

6. The nodule localization needle of claim 1, wherein: The outer diameter of the spring is greater than the inner diameter of the insertion hole.

7. A nodule localizing needle according to claim 3 or 4, wherein: The first limiting knot is a knot fixed on the positioning rope, and the size of the first limiting knot is greater than the inner diameter of the first insertion hole.

8. The nodule localizing needle of claim 4, wherein: The second limiting knot is a knot fixed on the positioning rope, and the size of the second limiting knot is greater than the inner diameter of the second insertion hole.

9. A nodule localizing needle according to any one of claims 1-6, characterized in that: The positioning rope is provided with a developing mark for showing the depth of the positioning mechanism inserted into the organ tissue, the developing mark is a developing line segment with a length of 0.2-0.5 cm, and a developing line segment is arranged on the positioning rope passing through the spring every 0.5-1 cm.

Images