Pulmonary nodule positioning needle

Abstract

The utility model discloses a pulmonary nodule positioning needle, which comprises a fixing part, an outer needle seat and an outer needle, the fixing part comprises a positioning needle body, an outer needle seat and an outer needle which are sequentially connected from back to front, and the positioning needle body is cylindrical; the pushing part is arranged to be capable of being inserted into the fixing part from the rear and sliding in the axial direction of the fixing part, the pushing part comprises a pushing seat and a pushing rod located in front of the pushing seat, the front end of the pushing rod is used for pushing the anchoring hook, and the outer diameter of the pushing rod is slightly smaller than the inner diameter of the outer needle; the locking device is arranged to be located between the fixing part and the pushing part; the pulmonary nodule positioning needle is set to have a locking state and an unlocking state, the relative positions of the pushing part and the fixing part are fixed in the locking state, and the pushing part can freely slide in the axial direction of the fixing part in the unlocking state. The push part can be prevented from being triggered by misoperation, the push part can be unlocked through simple action, and the push part has the advantages of being convenient to use, simple, labor-saving, capable of avoiding interference, capable of reducing the probability of misoperation and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ultrasonic equipment, in particular to a lung nodule positioning needle. BACKGROUND

[0002] With the development of image diagnosis technology, lung nodule minimally invasive surgery is more and more common. Generally, when the lung tissue of less than 1cm is removed, preoperative positioning is performed, that is, lung nodule positioning is achieved through CT guided percutaneous puncture. The preoperative positioning is usually performed by using a positioning needle, and a metal wire with a positioning hook at the end thereof is used as a positioning anchor. The structure of the conventional positioning needle can refer to the Chinese patent with the publication number CN204863412U. The positioning needle disclosed by the cited patent comprises a puncture needle, an anchor positioning needle, a positioning wire and a pushing device. The pushing device comprises a push tube and a push tube handle. The push tube is placed in the puncture needle sleeve. The distal end of the push tube abuts against the proximal end of the anchor positioning needle. The distal end of the positioning wire is connected to the proximal end of the anchor positioning needle. The positioning wire extends from the inside of the lumen of the push tube to the outside of the pushing device. In the positioning needle of the prior art, the anchor positioning needle is easily pushed out by mistake. If a threaded cooperation is provided to realize structure locking, although the problem of the anchor positioning needle being pushed out by mistake can be solved, the locking / unlocking process is relatively complex, and the operation is not convenient enough. SUMMARY

[0003] Therefore, the utility model provides a lung nodule positioning needle which can solve the above-mentioned existing technical problems. The utility model provides the following technical scheme:

[0004] A lung nodule positioning needle comprises a fixed part, a pushing part and a locking device. The fixed part comprises a positioning needle body and an outer needle connected in sequence from back to front. The positioning needle body is cylindrical. The pushing part is arranged to be inserted into the fixed part from the back and can slide along the axial direction of the fixed part. The pushing part comprises a pushing seat and a pushing rod located in front of the pushing seat. The front end of the pushing rod is used to push an anchor hook. The outer diameter of the pushing rod is slightly smaller than the inner diameter of the outer needle. The locking device is arranged between the fixed part and the pushing part. The lung nodule positioning needle is arranged to have two states of locking and unlocking. In the locking state, the relative position of the pushing part and the fixed part is fixed. In the unlocking state, the pushing part can freely slide along the axial direction of the fixed part.

[0005] Optionally, the locking device is a cylindrical locking knob arranged at the periphery of the rear end of the positioning needle body, the inner surface of the locking knob has a protruding locking block; the proximal rear end of the positioning needle body is provided with a locking block movable slot; the outer surface of the push seat has a locking slot; the locking block can rotate along the circumference of the positioning needle body in the locking movable slot to switch between the locked state and the unlocked state; in the locked state, the locking block is located in the locking slot; in the unlocked state, the locking block is located outside the locking slot.

[0006] Optionally, the push seat has a positioning point, the locking knob has a positioning slot, the positioning point and the positioning slot are positionally corresponding and jointly used for position alignment reminding of the push seat and the locking knob.

[0007] Optionally, the inner surface of the positioning needle body has an axially arranged guide slot, the outer surface of the push seat has an axially arranged guide ridge, and the guide slot and the guide ridge are positionally corresponding.

[0008] Optionally, the width of the guide slot is greater than the width of the guide ridge.

[0009] Optionally, the outer surface of the locking knob has a plurality of dialing strips.

[0010] Optionally, further comprising: a protective tube sleeve arranged to be detachably sleeved on the periphery of the outer needle.

[0011] Optionally, further comprising: an outer needle seat arranged between the positioning needle body and the outer needle.

[0012] Optionally, the surface of the outer needle seat has an anti-skid design.

[0013] The lung nodule positioning needle of the utility model embodiment is provided with a locking device (for example, a locking knob), which can prevent the pusher from being triggered by mistake, and the pusher can be unlocked by a simple action (for example, rotating the locking knob), so that the user can push the push rod and then push out the anchoring hook, and the lung nodule positioning needle has the advantages of convenient use, simple and labor-saving, interference avoidance, and reduced probability of mistaken operation. BRIEF DESCRIPTION OF DRAWINGS

[0014] For the purpose of illustration and not limitation, the utility model will now be described according to the preferred embodiments of the utility model, in particular with reference to the accompanying drawings, in which:

[0015] Figure 1 is a perspective view of the lung nodule positioning needle according to the utility model embodiment;

[0016] Figure 2A and Figure 2BIt is a three-dimensional schematic view of different angles of the positioning needle body in the lung nodule positioning needle according to the embodiment of the utility model;

[0017] Figure 3A And Figure 3B It is a three-dimensional schematic view of different angles of the pushing part in the lung nodule positioning needle according to the embodiment of the utility model;

[0018] Figure 4 It is a three-dimensional schematic view of the pushing seat in the lung nodule positioning needle according to the embodiment of the utility model;

[0019] Figure 5 It is a three-dimensional schematic view of the locking knob in the lung nodule positioning needle according to the embodiment of the utility model;

[0020] Figure 6 It is a three-dimensional schematic view of the mutual cooperation of the positioning needle body and the locking knob in the lung nodule positioning needle according to the embodiment of the utility model;

[0021] Figure 7 It is a three-dimensional schematic view of the mutual cooperation of the positioning needle body, the pushing seat and the locking knob in the lung nodule positioning needle according to the embodiment of the utility model;

[0022] Figure 8 It is a three-dimensional schematic view of the lung nodule positioning needle with a protective tube sleeve according to the embodiment of the utility model;

[0023] Figure 9A It is Figure 8 The front view of the lung nodule positioning needle with a protective tube sleeve shown in the figure;

[0024] Figure 9B It is Figure 9A The A-A position cross-sectional schematic view in the figure;

[0025] Figure 9C It is Figure 9A The B-B position cross-sectional schematic view in the figure;

[0026] Figure 9D It is Figure 9A The C-C position cross-sectional schematic view in the figure.

[0027] In the figure:

[0028] Fixed part 1; Positioning needle body 11; Locking block movable groove 111; Guide groove 112; Outer needle seat 12; Anti-skid design 121; Outer needle 13; Scale mark 131; Pushing part 2; Pushing seat 21; Locking groove 211; Positioning point 212; Guide rib 213; Pushing rod 22; Locking knob 3; Locking block 31; Positioning groove 32; Turn bar 33; Protective tube sleeve 4. DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0030] In the description of the embodiments of the present application, "front" refers to the end far from the operator, and "rear" refers to the end close to the operator. It should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection" and the like should be interpreted broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] As shown in Figure 1 , the lung nodule positioning needle according to the embodiments of the present application mainly comprises: a fixed part 1, a pushing part 2 and a locking device. The fixed part 1 comprises a positioning needle body 11 and an outer needle 13 connected in order from rear to front. The positioning needle body 11 is cylindrical. The pushing part 2 is arranged to be capable of being inserted from the rear into the fixed part 1 and capable of sliding along the axial direction of the fixed part 1. Specifically, after the pushing part 2 is inserted into the fixed part 1, as shown in Figure 1 , the fixed part 1 and the pushing part 2 have a common axis (i.e. the red line in Figure 1 ), and the pushing part 2 can slide back and forth along the axis without being locked. The pushing part 2 comprises a pushing seat 21 and a pushing rod 22 located in front of the pushing seat 21, and the front end of the pushing rod 22 is used to push the anchoring hook. Since the form of the anchoring hook is flexible and diverse, it is usually used as a consumable rather than a fixed component in the lung nodule positioning needle of the present application, so Figure 1 , the anchoring hook is omitted. The outer diameter of the pushing rod 22 is slightly smaller than the inner diameter of the outer needle 13, which means that the pushing rod 22 can be inserted into the outer needle 13 and basically can block the cross section of the outer needle 13, so that it can have enough contact area with the anchoring hook and smoothly push the anchoring hook. The locking device is arranged between the fixed part 1 and the pushing part 2. The lung nodule positioning needle is arranged to have two states of locking and unlocking, and in the locked state, the relative position of the pushing part 2 and the fixed part 1 is fixed, and in the unlocked state, the pushing part 2 can freely slide along the axial direction of the fixed part 1.

[0032] As shown in Figure 2A and Figure 2B , a locking block movable slot 111 is arranged at the proximal end of the positioning needle body 11. As shown in Figure 3A andFigure 4 As shown in the figure, the outer surface of the push seat 21 has a locking groove 211. As shown in the figure, Figure 5 As shown in the figure, the locking device can be a cylindrical locking knob 3. The inner surface of the locking knob 3 has a protruding locking block 31. As shown in the figure, Figure 6 As shown in the figure, the locking knob 3 is arranged at the periphery of the rear end of the positioning needle body 11. The locking block 31 can rotate in the locking block active groove 111 along the circumference of the positioning needle body 11 to realize the switching of the locking / unlocking state. In the locking state, the locking block 31 is located in the locking groove 211; in the unlocking state, the locking block 31 is located outside the locking groove 211.

[0033] As shown in the figure, Figure 2A As shown in the figure, Figure 2B As shown in the figure, the locking block active groove 111 can be L-shaped and can be divided into two parts of a circumferential segment and an axial segment. The circumferential segment is provided to guide the locking block 31 to rotate along the circumference; the axial segment is provided to guide the locking block 31 to enter the circumferential segment and provide an insertion path of the locking block 31. It should be noted that the axial segment of the locking block active groove 111 is not necessary and other alternatives can be used.

[0034] The lung nodule positioning needle of the embodiment of the utility model is provided with a locking device (for example, a locking knob), which can prevent the pusher from being triggered by mistake, and the pusher can be unlocked by a simple action (for example, rotating the locking knob), so that the user can push the push rod and then push out the anchoring hook, which has the advantages of convenient use, simple and labor-saving, avoiding interference, reducing the probability of mistake and the like.

[0035] As shown in the figure, Figure 4 As shown in the figure, the push seat 21 has a positioning point 212. As shown in the figure, Figure 5 As shown in the figure, the locking knob 3 has a positioning groove 32. As shown in the figure, Figure 7 As shown in the figure, the positioning point 212 and the positioning groove 32 are positionally corresponding and are used in combination for the position alignment reminder of the push seat 21 and the locking knob 3. Specifically, the locking block 31 can be located outside the locking groove 211 and the pusher 2 can slide along the axial direction when the positioning point 212 and the positioning groove 32 are aligned.

[0036] In order to facilitate the insertion of the pusher 2 into the fixed part 1 and the sliding along the axial direction, as shown in the figure, Figure 2A As shown in the figure, Figure 2B As shown in the figure, the inner surface of the positioning needle body 11 has a guide groove 112 arranged along the axial direction; as shown in the figure, Figure 3B As shown in the figure, the outer surface of the push seat 21 has a guide rib 213 arranged along the axial direction; as shown in the figure, Figure 9C As shown in the figure, Figure 9D As shown in the figure, the guide groove 112 and the guide rib 213 are positionally corresponding. Preferably, the width of the guide groove 112 is greater than the width of the guide rib 213, so as to reserve the rotation space of the guide rib 213.

[0037] As shown in Figure 5 , the outer surface of the locking knob 3 can have a plurality of rotating bars 33 to facilitate the user to rotate the locking knob 3 to switch the locking / unlocking state.

[0038] As shown in Figure 8 and Figure 9A , the lung nodule positioning needle can further include a protective sleeve 4 arranged to be detachably sleeved on the periphery of the outer needle 13 for protecting the outer needle 13.

[0039] As shown in Figure 1 , the outer surface of the outer needle 13 can be provided with a scale mark 131 to facilitate the measurement of the lesion depth.

[0040] As shown in Figure 1 , the lung nodule positioning needle can further include an outer needle seat 12 between the positioning needle body 11 and the outer needle 13. The outer needle seat 12 can be used to strengthen the connection firmness between the positioning needle body 11 and the outer needle 13. The surface of the outer needle seat 12 can have an anti-slip design 121 (as shown in Figure 1 and Figure 8 , which can be a plurality of convex strips arranged on the surface of the outer needle seat 12), and the adoption of the anti-slip design helps the user to hold and makes the operation more stable when the needle is pushed in.

[0041] The assembly and use method of the lung nodule positioning needle of the present application is as follows: first, a fixed part 1 is provided. The locking knob 3 is sleeved on the periphery of the rear end of the positioning needle body 11, and at the same time, the locking block 31 is inserted into the preset installation position in the circumferential segment of the locking block movable slot 111. When the locking block 31 is located at the preset installation position, it does not hinder the push part 2 from being able to slide inside the fixed part 1. The anchoring hook is filled into the inside of the fixed part 1, and the push rod 22 is inserted from the rear end of the positioning needle body 11 to push the anchoring hook to a slightly forward position in the barrel of the outer needle 13. The locking knob 3 is rotated to adjust the position of the locking block 31 until the locking block 31 slides into the locking groove 211 on the outer surface of the push seat 21, at which time the locking of the push part 2 is achieved. The needle tip of the outer needle 13 pierces the skin, and the entire lung nodule positioning needle (together with the anchoring hook) is pushed to the lesion position to achieve puncture intervention. During this pushing process, the push part 2 is locked and cannot be caused to slide forward by mistake, thereby avoiding the anchoring hook from being prematurely ejected. Then, the locking knob 3 is rotated again to adjust the position of the locking block until the locking block 31 slides out of the locking groove 211, achieving the unlocking of the push part 2. The push seat 21 and the push rod 22 are pushed forward again to eject the anchoring needle from the front end of the outer needle 31, and the anchoring needle releases the tissue at the lesion position by its hook to achieve positioning. Finally, the lung nodule positioning needle is withdrawn as a whole. In the above operation method, only a slight rotation of the locking knob 3 is required to switch the locking / unlocking state of the push part 2, and a single hand of the user can complete the operation, which has the advantages of convenient use, simplicity, labor saving, etc.

[0042] The above detailed description does not constitute a limitation on the protection scope of the present application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations, and substitutions can occur depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lung nodule localization needle, characterized by, The lung nodule positioning needle comprises a fixing part (1) and a pushing part (2), wherein the fixing part (1) comprises a positioning needle body (11) and an outer needle (13) connected in sequence from back to front, the positioning needle body (11) is in a cylindrical shape, the pushing part (2) is arranged to be capable of being inserted into the fixing part (1) from the back and capable of sliding along the axial direction of the fixing part (1), the pushing part (2) comprises a pushing seat (21) and a pushing rod (22) located in front of the pushing seat (21), the front end of the pushing rod (22) is used for pushing an anchoring hook, and the outer diameter of the pushing rod (22) is smaller than the inner diameter of the outer needle (13).

2. The lung nodule positioning needle according to claim 1, wherein the locking device is a locking knob (3) in a cylindrical shape, the locking knob (3) is arranged on the periphery of the rear end of the positioning needle body (11), and the inner surface of the locking knob (3) is provided with a protruding locking block (31).

3. The lung nodule positioning needle according to claim 1, wherein the near-rear end of the positioning needle body (11) is provided with a locking block movable slot (111).

4. The lung nodule positioning needle according to claim 1, wherein the outer surface of the pushing seat (21) is provided with a locking groove (211).

5. The lung nodule positioning needle according to claim 1, wherein the locking block (31) is capable of rotating along the circumference of the positioning needle body (11) in the locking block movable slot (111) to realize the switching between the locking state and the unlocking state.

6. The lung nodule positioning needle according to claim 1, wherein in the locking state, the locking block (31) is located in the locking groove (211).

7. The lung nodule positioning needle according to claim 1, wherein in the unlocking state, the locking block (31) is located outside the locking groove (211).

8. The lung nodule positioning needle according to claim 1, wherein the pushing seat (21) is provided with a positioning point (212), the locking knob (3) is provided with a positioning groove (32), the positioning point (212) and the positioning groove (32) are positionally corresponding, and the two are combined to serve as a position alignment reminder for the pushing seat (21) and the locking knob (3).

9. The lung nodule positioning needle according to claim 1, wherein the inner surface of the positioning needle body (11) is provided with a guide groove (112) arranged along the axial direction, the outer surface of the pushing seat (21) is provided with a guide ridge (213) arranged along the axial direction, and the guide groove (112) and the guide ridge (213) are positionally corresponding.

10. The lung nodule positioning needle according to claim 1, wherein the width of the guide groove (112) is greater than the width of the guide ridge (213).

11. The lung nodule positioning needle according to claim 1, wherein the outer surface of the locking knob (3) is provided with a plurality of dialing strips (33).

12. The lung nodule positioning needle according to claim 1, further comprising a protective sleeve (4) arranged to be detachably sleeved on the periphery of the outer needle (13).

3. The lung nodule localization needle of claim 2, wherein, 13. The lung nodule positioning needle according to claim 1, further comprising an outer needle seat (12) arranged between the positioning needle body (11) and the outer needle (13).

14. The lung nodule positioning needle according to claim 1, wherein the surface of the outer needle seat (12) is provided with an anti-skid design (121). ​ 5. The lung nodule localization needle of claim 4, wherein, ​ 6. The lung nodule localization needle of claim 2, wherein, ​ 7. The lung nodule localization needle of any of claims 1 to 6, wherein, ​ ​ 8. The lung nodule localization needle of any one of claims 1 to 6, wherein, ​ ​ 9. The lung nodule localization needle of claim 8, wherein, ​

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