A disposable biopsy needle

Abstract

The present invention relates to the technical field of medical supplies, and in particular to a disposable biopsy needle with multiple ejection strokes, wherein the disposable biopsy needle has a gear adjustment component; the gear adjustment component can be used to adjust the insertion depths of an inner needle and an outer needle, so that the disposable biopsy needle can meet various biopsy operation requirements and has higher versatility; a doctor can perform a more effective, accurate, and appropriate puncture biopsy operation, and obtain desired good lesion tissue without damaging other organs, nerves, blood vessels and other tissues; a more reliable operation is provided to the patient, and the doctor's operation efficiency and biopsy operation quality are effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical supplies, in particular to a disposable biopsy needle with multiple ejection strokes. Background Art

[0002] Tissue tumors are serious diseases that endanger human health and life. In recent years, the incidence rate has gradually increased, and the age of onset has gradually decreased. Therefore, the nature of tissue tumors needs to be diagnosed as early as possible. Correct diagnosis requires a combination of clinical, imaging and pathological steps. Among them, pathological diagnosis plays a key role in the selection of treatment options. Puncture biopsy is the main way to obtain tissue samples.

[0003] Chinese patent CN109646061A discloses a biopsy needle with two excitation modes, including a first winding button 3 and a second winding button 13, wherein the first winding button 3 is connected to the outer needle 2, and the second winding button 13 is connected to the inner needle 1. When the two winding buttons are in the contracted state, two excitation modes can be selected, one is to use the rear excitation button 7 or the side excitation button 5 to excite the two winding buttons at one time, and the other is to use the first elastic sheet 14 and the second elastic sheet 15 to excite the two winding buttons separately, that is, twice. The biopsy needle has two excitation modes, which can be switched at any time, solving the problem of which excitation mode of the biopsy needle to choose when doctors deal with cumbersome and complex lesion environments, and can provide the most timely and most suitable biopsy plan for patients at any time.

[0004] However, since patients need biopsy sampling at different sites, such as prostate, kidney, liver, spleen, breast and other tissues, the sizes of suspected tumors that need puncture biopsy are usually different. Therefore, a biopsy needle with a suitable ejection stroke and puncture sampling length is required for the operation. The inner needle and outer needle of the above-mentioned biopsy needle have only one ejection stroke (generally 22mm). When the surgeon performs puncture surgery on small organs or small suspected tumors, there is a risk of puncturing other organs and tissues due to the excessive ejection stroke of the biopsy needle, which may cause the operation to be unsuccessful or fail. Summary of the invention

[0005] In view of this, the present invention provides a disposable biopsy needle with a gear adjustment function, which can adjust the puncture depth of the inner needle and the outer needle, thereby improving the versatility of the disposable biopsy needle.

[0006] On one hand, the present invention provides a disposable biopsy needle, comprising a base, a front cover plate and two winding buttons, wherein the front cover plate is arranged in parallel with the bottom plate of the base and a gap is provided between the two, a cover plate slot is provided on the side of the winding button facing the front cover plate, the winding button can trigger the slot to move toward the front cover plate and be inserted into the cover plate slot, the limiting end of the front cover plate abuts against the bottom surface of the cover plate slot, the limiting end of the front cover plate is provided with a baffle slot, and the front cover plate is provided with a gear adjustment component; the gear adjustment component comprises a baffle and an adjusting pin, the baffle plate is inserted into the baffle slot, the adjusting pin penetrates along the side wall of the baffle plate and passes through the baffle plate, and the axis of the adjusting pin is perpendicular to the ejection direction of the winding button; the two side walls of the base are provided with a gear adjustment device, and the two ends of the adjusting pin are provided with a clamping component that can be connected to the gear adjustment device, and when the adjusting pin is adjusted to different gears of the gear adjustment device, the baffle plate is driven to move synchronously, thereby adjusting the length of the protruding end of the baffle plate extending out of the limiting end of the front cover plate.

[0007] Optionally, the gear shifting device includes a plurality of linearly distributed gear holes and a plurality of strip channels, wherein the strip channels connect adjacent gear holes; the plurality of gear holes are symmetrically arranged on two side wall surfaces of the base along the ejection direction of the winding button; the snap-fit ​​assembly has a columnar protrusion, and the end of the adjusting pin passes through the columnar protrusion along the axis of the columnar protrusion, and the columnar protrusion can slide along the axis of the adjusting pin and snap-fit ​​with the gear hole.

[0008] Optionally, the columnar protrusion is interference fit with the gear hole.

[0009] Optionally, the clamping assembly further includes a pressing cap, one end of the columnar protrusion is connected to the pressing cap, and the adjusting pin passes through the pressing cap; the outer diameter of the pressing cap is larger than the inner diameter of the gear hole.

[0010] Optionally, anti-dropout protrusions are provided at both ends of the adjusting pin, and at least one anti-dropout protrusion is threadedly connected to the adjusting pin; and a receiving groove for accommodating the anti-dropout protrusion is provided on the side of the pressure cap facing the anti-dropout protrusion.

[0011] Optionally, a gear mark corresponding to the gear hole is provided on the side wall of the base.

[0012] Optionally, the gear hole farthest from the limit end of the front cover plate along the ejection direction of the winding button among the multiple gear holes is the maximum ejection stroke gear hole; when the adjusting pin is adjusted to the maximum ejection stroke gear hole, the protruding end of the baffle is flush with the limit end of the front cover plate.

[0013] The disposable biopsy needle provided by the present invention has a gear adjustment component; the gear adjustment component can be used to adjust the insertion depth of the inner needle and the outer needle, so that the disposable biopsy needle can meet the needs of various biopsy operations and has higher versatility; the doctor can perform more effective, accurate and appropriate puncture biopsy operations, and obtain the desired good lesion tissue without damaging other organs, nerves, blood vessels and other tissues; it brings more reliable operations to patients and effectively improves the doctor's operation efficiency and biopsy operation quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] For purposes of illustration and not limitation, the present invention will now be described in terms of preferred embodiments thereof, with particular reference to the accompanying drawings, in which:

[0015] Figure 1 A schematic structural diagram of a disposable biopsy needle provided in an embodiment of the present invention;

[0016] Figure 2 An exploded view of a disposable biopsy needle provided in an embodiment of the present invention;

[0017] Figure 3 is a schematic diagram of the structure of the base;

[0018] Figure 4 is a schematic diagram of the structure of the first winding button;

[0019] Figure 5 is a schematic diagram of the structure of the second winding button;

[0020] Figure 6 is a schematic diagram of the structure of the baffle;

[0021] Figure 7 It is a partial enlarged view of the gear adjustment component;

[0022] Figure 8 It is a cross-sectional view of the gear adjustment assembly;

[0023] Fig. 9 It is a schematic diagram of turning the pressure cap;

[0024] Fig.10 It is a schematic diagram after the columnar protrusion is separated from the gear hole.

[0025] In the figure:

[0026] 1: Inner needle; 2: Outer needle; 3: First winding button; 4: Front cover; 5: Side trigger button; 6: Base; 7: Rear trigger button; 8: Button compression spring; 9: Left pusher; 10: Right pusher; 11: Blocking piece; 12: Pressing cap; 13: Adjusting pin; 14: Anti-dropping protrusion; 15: Upper cover; 16: Triggering compression spring; 17: Second winding button; 18: Columnar protrusion; 19: First elastic sheet; 20: Second elastic sheet; 31: First gear wall; 32: First locking hook; 61: Left gear hole; 62: Right gear hole; 63: Left locking rib; 64: Right locking rib; 111: Blocking wall; 171: Second gear wall; 172: Second locking hook. DETAILED DESCRIPTION

[0027] In the embodiment of the present invention, the structure of the puncture stent is effectively optimized, which can not only reduce the volume and cost, but also facilitate the doctor's flexible operation and reduce the discomfort of the patient during use, which is described in detail below.

[0028] When the disposable biopsy needle is used, the inner needle 1 is first inserted into the lesion. The inner needle 1 is provided with a sampling groove, and the sampling groove is full of lesions. Then the outer needle 2 is inserted into the lesion. The outer needle 2 quickly enters the lesion and cuts the lesion at the sampling groove, so that the cut part of the lesion remains in the sampling groove. Finally, the disposable biopsy needle is taken out and the taken lesion sample is tested and analyzed.

[0029] Figure 1 A schematic structural diagram of a disposable biopsy needle provided in an embodiment of the present invention; Figure 2 An exploded view of a disposable biopsy needle provided in an embodiment of the present invention; Figure 3 is a schematic diagram of the structure of the base; Figure 4 is a schematic diagram of the structure of the first winding button; Figure 5 is a schematic diagram of the structure of the second winding button; Figures 1 to 5 As shown, when the disposable biopsy needle is wound, the first winding button 3 and the second winding button 17 are pressed first. The two winding buttons will compress the excitation spring 16, and the first locking hook 32 of the first winding button 3 is engaged with the left locking rib position 63, and the second locking hook 172 of the second winding button 17 is engaged with the right locking rib position 64. At this time, the outer needle 2 and the inner needle 1 are both in a retracted state.

[0030] The disposable biopsy needle provided in the embodiment of the present invention has two excitation modes for the inner needle 1 and the outer needle 2, which are respectively described below.

[0031] One excitation method is one-time excitation, that is, pressing the rear excitation button 7 or the side excitation button 5 to overcome the elastic force of the button compression spring 8, driving the first push rod and the second push rod on the rear excitation button 7 to move, and the two push rods push the first locking hook 32 and the second locking hook 172 respectively (pushed by the left push member 9 and the right push member 10), so that the first locking hook 32 is separated from the left locking rib 63, and the second locking hook 172 is separated from the right locking rib 64. Among them, the length of the second push rod is slightly longer than the first push rod. Therefore, after pressing the rear excitation button 7 or the side excitation button 5, the second push rod first separates the second locking hook 172 from the right locking rib 64, and then the first push rod separates the first locking hook 32 from the left locking rib 63. The separation time difference between the two realizes the first entry of the inner needle 1 and the later entry of the outer needle 2.

[0032] Another way to activate is to activate twice, that is, to press the first elastic sheet 19 and the second elastic sheet 20 on the upper cover 15 in steps, to press the first elastic sheet 19, and the right pusher 10 separates the second locking hook 172 from the right locking rib 64, and the inner needle 1 completes the insertion, and then press the second elastic sheet 20, and the left pusher 9 separates the first locking hook 32 from the left locking rib 63, and the outer needle 2 completes the insertion.

[0033] The disposable biopsy needle provided in the embodiment of the present invention has two activation modes, which can meet more operation requirements. At the same time, the disposable biopsy needle can also use the gear adjustment component to adjust the insertion length of the inner needle 1 and the outer needle 2. Different insertion lengths can meet more usage requirements.

[0034] Figure 6 is a schematic diagram of the structure of the baffle; Figure 7 It is a partial enlarged view of the gear adjustment component; Figure 8 is a cross-sectional view of the gear adjustment assembly; Figure 2 , Figures 4 to 8As shown, the gear adjustment assembly includes a baffle 11 and an adjusting pin 13. The baffle 11 is inserted into the baffle 11 slot. The side wall of the baffle 11 is provided with an adjusting pin 13 that penetrates the baffle 11, and the axis of the adjusting pin 13 is perpendicular to the ejection direction of the winding button; the two side walls of the base 6 are provided with a gear adjustment device, and both ends of the adjusting pin 13 are provided with a clamping assembly that can be connected to the gear adjustment device. When the adjusting pin 13 is adjusted to different gears of the gear adjustment device, the baffle 11 is driven to move synchronously, thereby adjusting the length of the protruding end of the baffle 11 extending out of the limiting end of the front cover 4. The first winding button 3 includes a first gear wall 31 (i.e., the bottom surface of the cover slot of the first winding button 3), and the second winding button 17 includes a second gear wall 171 (i.e., the bottom surface of the cover slot of the second winding button 17). When the existing disposable biopsy needle does not have a gear adjustment component, after the inner needle 1 and the outer needle 2 are stimulated, the first gear wall 31 and the second gear wall 171 respectively abut against the limiting ends of the front cover 4; when the gear adjustment component is set according to the embodiment of the present invention, the baffle 11 is adjusted to extend along the limiting end of the front cover 4, and after the inner needle 1 and the outer needle 2 are stimulated, the first gear wall 31 and the second gear wall 171 abut against the protruding end of the baffle 11, i.e., the baffle wall 111, so that the insertion length of the inner needle 1 and the outer needle 2 is shortened, thereby achieving the purpose of adjusting the insertion length.

[0035] The gear hole farthest from the limit end of the front cover plate 4 along the ejection direction of the winding button among the multiple gear holes is the maximum ejection stroke gear hole; when the adjustment pin 13 is adjusted to the maximum ejection stroke gear hole, the extended end of the blocking piece 11 is flush with the limit end of the front cover plate 4. When the adjustment pin 13 is at the maximum ejection stroke gear hole, the gear position is changed to the original position, that is, the first gear wall 31 and the second gear wall 171 abut against the limit end of the front cover plate 4. With the gear adjustment, the blocking piece 11 extends out of the front cover plate 4, and the first gear wall 31 and the second gear wall 171 abut against the blocking wall 111 of the blocking piece 11.

[0036] Fig. 9 It is a schematic diagram of turning the pressure cap; Fig.10 is a schematic diagram of the columnar protrusion and the gear hole after separation; Figure 3 , Figures 7 to 10 As shown, the gear adjustment device includes a plurality of linearly distributed gear holes and a plurality of strip channels, wherein the strip channels are connected to adjacent gear holes; the plurality of gear holes are symmetrically arranged on the two side wall surfaces of the base 6 along the ejection direction of the winding button, and are divided into a left gear hole 61 and a right gear hole 62; the clamping assembly has a columnar protrusion 18, and the end of the adjustment pin 13 passes through the columnar protrusion 18 along the axis of the columnar protrusion 18, and the columnar protrusion 18 can slide along the axis of the adjustment pin 13 and be clamped with the gear hole, preferably, the two are connected by interference fit. The clamping assembly can be fixedly connected with the gear hole so that the blocking piece 11 cannot move at the corresponding gear position, and at the same time, it can be separated from the gear hole to realize the free adjustment of the adjustment pin 13.

[0037] like Figure 2 , Figure 7 , Fig. 9 and Fig.10 As shown, the clamping assembly also includes a pressing cap 12, one end of the columnar protrusion 18 is connected to the pressing cap 12, and the adjusting pin 13 passes through the pressing cap 12; the outer diameter of the pressing cap 12 is larger than the inner diameter of the gear hole. When adjusting the position of the clamping assembly, in order to facilitate the pulling of the columnar protrusion 18 to separate it from the gear hole, the pressing cap 12 with a larger outer diameter is connected to the columnar protrusion 18, thereby facilitating the pulling operation. Anti-slip protrusions 14 are provided at both ends of the adjusting pin 13, and at least one anti-slip protrusion 14 is threadedly connected to the adjusting pin 13; a receiving groove for accommodating the anti-slip protrusion 14 is provided on the side of the pressing cap 12 facing the anti-slip protrusion 14. The outer diameter of the anti-slip protrusion 14 is larger than the aperture of the hole on the baffle 11, thereby preventing the adjusting pin 13 from separating from the baffle 11. In order to facilitate the installation between the baffle 11 and the adjusting pin 13, the anti-slip protrusion 14 and the adjusting pin 13 are threadedly connected.

[0038] The side wall of the base 6 is provided with a gear mark corresponding to the gear hole. The number displayed on the gear mark is the insertion length of the biopsy needle, which has a prompting function. Each gear hole corresponds to a gear mark. Among them, the disposable biopsy needle can be divided into multiple models according to the length of the baffle 11. For example, Figure 3 The base 6 shown includes four gears: 22mm, 17mm, 12mm, and 7mm, or, Figure 7 The base 6 shown includes four gears: 20 mm, 15 mm, 10 mm, and 5 mm.

[0039] The disposable biopsy needle provided in the embodiment of the present invention allows the doctor to select the corresponding disposable biopsy needle and determine the ejection length according to the location and size of the lesion before the operation. Fig. 9 and Fig.10 As shown, the pressure cap 12 is pulled to separate the columnar protrusion 18 from the current gear hole. After separation, the adjustment pin 13 can move freely in the strip channel. The adjustment pin 13 is moved to the desired gear hole, and the pressure cap 12 is pressed in the direction of the new gear hole, so that the columnar protrusion 18 is pressed into the gear hole. At this time, the baffle 11 is adjusted to the new gear, and the baffle wall 111 of the baffle 11 extends outward by a corresponding length. For example, when the gear is adjusted from 15mm to 10mm, the baffle 11 extends outward by 5mm. After the inner needle 1 and the outer needle 2 are stimulated by one or two stimulations, the needle insertion length of the inner needle 1 and the outer needle 2 is adjusted to the desired ejection length.

[0040] The disposable biopsy needle provided in the embodiment of the present invention can meet the needs of various biopsy operations through gear adjustment, and has higher versatility; the doctor can perform more effective, accurate and appropriate puncture biopsy operations, and obtain the desired good lesion tissue without damaging other organs, nerves, blood vessels and other tissues; it brings more reliable operations to patients and effectively improves the doctor's surgical efficiency and biopsy operation quality.

[0041] The above specific implementations do not constitute a limitation on the scope of protection of the present invention. It should be understood by those skilled in the art that various modifications, mixtures, sub-mixes and substitutions may occur depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A disposable biopsy needle, comprising a base (6), a front cover (4) and two winding buttons, wherein the front cover (4) and the bottom plate of the base (6) are arranged in parallel, and a gap is provided between the two, and a cover slot is provided on the side of the winding button facing the front cover (4), and the winding button can trigger the slot to move toward the front cover and be inserted into the cover slot, and the limiting end of the front cover (4) abuts against the bottom surface of the cover slot, characterized in that: A blocking piece slot is provided at the limiting end of the front cover plate (4), and a gear position adjustment component is provided on the front cover plate (4); The gear adjustment component comprises a baffle (11) and an adjustment pin (13), wherein the baffle (11) is inserted into the baffle slot, the adjustment pin (13) penetrates along the side wall of the baffle (11) and passes through the baffle (11), and the axis of the adjustment pin (13) is perpendicular to the ejection direction of the winding button; Two side walls of the base (6) are provided with a gear adjustment device, and both ends of the adjustment pin (13) are provided with a clamping assembly that can be connected to the gear adjustment device. When the adjustment pin (13) is adjusted to different gear positions of the gear adjustment device, the baffle (11) is driven to move synchronously, thereby adjusting the length of the extended end of the baffle (11) extending out of the limit end of the front cover plate (4); The gear-adjusting device comprises a plurality of gear holes distributed in a linear shape and a plurality of strip-shaped channels, wherein the strip-shaped channels are connected to adjacent gear holes; A plurality of gear holes are symmetrically arranged on two side wall surfaces of the base along the ejection direction of the winding button; The clamping assembly has a columnar protrusion (18), the end of the adjusting pin (13) passes through the columnar protrusion (18) along the axis of the columnar protrusion (18), and the columnar protrusion (18) can slide along the axis of the adjusting pin (13) and clamp with the gear hole; The clamping assembly is fixedly connected to the gear hole so that the blocking piece (11) cannot move at the corresponding gear position, or the clamping assembly is separated from the gear hole to achieve free adjustment of the adjustment pin (13).

2. The disposable biopsy needle according to claim 1, characterized in that: The columnar protrusion (18) is interference fit with the gear hole.

3. The disposable biopsy needle according to claim 1, characterized in that: The clamping assembly also includes a pressing cap (12), one end of the columnar protrusion (18) is connected to the pressing cap (12), and the adjusting pin (13) passes through the pressing cap (12); The outer diameter of the pressing cap (12) is larger than the inner diameter of the gear hole.

4. The disposable biopsy needle according to claim 3, characterized in that: Anti-dropout protrusions (14) are provided at both ends of the adjusting pin (13), and at least one anti-dropout protrusion (14) is threadedly connected to the adjusting pin (13); A receiving groove for receiving the anti-dropping protrusion (14) is provided on one side of the pressing cap (12) facing the anti-dropping protrusion (14).

5. The disposable biopsy needle according to any one of claims 2 to 4, characterized in that: A gear mark corresponding to the gear hole is provided on the side wall of the base (6).

6. The disposable biopsy needle according to claim 5, characterized in that: The gear hole farthest from the limit end of the front cover plate along the ejection direction of the winding button among the multiple gear holes is the gear hole with the maximum ejection stroke; When the adjustment pin (13) is adjusted to the maximum ejection travel gear position hole, the extended end of the blocking piece (11) is flush with the limiting end of the front cover plate (4).

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