An automatically adjustable biopsy gun

Abstract

The application discloses a full-automatic biopsy gun capable of adjusting the file, adopts simple structure to realize the adjustment of the shooting range of the inner needle and the outer needle of the biopsy puncture needle, is simple and convenient to operate, and is helpful to improve the stability of the biopsy gun during the excitation. The full-automatic biopsy gun comprises an inner shell, an inner needle seat, a connecting rod, an outer needle seat, a sliding rail, a stopper and a pad connected with the stopper. The sliding rail is arranged at the bottom of the inner shell, the needle insertion direction is longitudinal, and the sliding rail is arranged in the transverse direction. The stopper is arranged on the sliding rail and can slide from a first position to a second position. When the stopper is located at the first position, after the inner needle seat is excited, the inner needle seat striker of the inner needle seat collides with the linkage striker of the connecting rod, so that the outer needle seat is excited. When the stopper is located at the second position, the pad is located between the inner needle seat striker and the linkage striker, and the stopper is located on the advancing route of the front end surface of the inner needle seat after the inner needle seat is excited.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a fully automated biopsy gun with adjustable settings. Background Technology

[0002] Ultrasound imaging equipment can display the lesion area in the patient's body in real time. Under ultrasound guidance, the puncture needle is guided to the target location in the body to achieve cytological biopsy, histological biopsy, cyst aspiration and treatment, etc. It is currently an important means of disease monitoring and treatment.

[0003] The puncture needle is an essential tool in this type of ultrasound-guided surgery. Current puncture needles used for biopsies typically employ an inner and outer needle structure. The inner needle is a solid needle with a small portion missing near the end (forming a frustum or semicircle in cross-section) to create a receiving cavity. The outer needle is a hollow tube that fits over the inner needle. Both are housed within the biopsy gun, mounted on the inner and outer needle holders, respectively. For fully automated biopsy guns, a connecting rod connects the outer and inner needle holders. When the doctor presses the activation button, the inner needle holder is activated first, which then drives the connecting rod to activate the outer needle holder (the outer needle holder is locked after being wound up, with the upper spring compressed; when the connecting rod is activated, the locked outer needle holder is released, and the upper spring pushes it out). This allows for the activation of both needle holders with a single button press. The inner and outer needles, along with the connecting rod, are housed within the inner casing of the biopsy gun. The biopsy gun also has an outer casing that fits over the inner casing.

[0004] According to the above operation method, the fully automatic biopsy gun first triggers the inner needle to puncture the target area, and then triggers the outer needle to follow the inner needle to puncture. At this time, the inner needle is inserted into the tissue of the target area. During the puncture process, the tip of the outer needle cuts off a part of the tissue of the target area and simultaneously accommodates it in the receiving cavity of the inner needle. It is then pulled out along with the inner and outer needles for biopsy analysis.

[0005] Because the target area varies in size and shape depending on the location of the ultrasound-guided surgery, doctors typically select biopsy needles with different ranges (the displacement of the needles after stimulation) to meet the biopsy requirements. Existing adjustable-range biopsy needles generally achieve this adjustment through complex transmission mechanisms such as adjustment knobs. This complex structure significantly increases production costs and also introduces some factors affecting the stability of the biopsy needle. Summary of the Invention

[0006] In view of this, the present invention proposes a fully automatic biopsy gun with adjustable range, employing a simple structure to achieve adjustment of the inner and outer needle ranges of the biopsy puncture needle, and is easy to operate, while also contributing to improved stability of the biopsy gun during stimulation. The present invention proposes the following technical solution:

[0007] An adjustable fully automatic biopsy gun includes an inner housing, an inner needle seat, a connecting rod, and an outer needle seat. The fully automatic biopsy gun also includes a slide rail, a stop block, and a pad connected to the stop block. The slide rail is located at the bottom of the inner housing, with the needle insertion direction as its longitudinal direction and is arranged laterally. The stop block is located on the slide rail and can slide from a first position to a second position. When the stop block is in the first position, after the inner needle seat is activated, the inner needle seat impact block of the inner needle seat collides with the linkage impact block of the connecting rod, thereby activating the outer needle seat. When the stop block is in the second position, the pad block is located between the inner needle seat impact block and the linkage impact block, and the stop block is located on the forward path of the inner needle seat's front end face after activation.

[0008] Optionally, the stop block has a first impact surface and a second impact surface, with the first impact surface located in front of and to the right of the second impact surface. Thus, when the stop block is in the first position, after the inner needle seat is activated, the front end face of the inner needle seat collides with the first impact surface, and when the stop block is in the second position, after the inner needle seat is activated, the front end face of the inner needle seat collides with the second impact surface; and the longitudinal distance between the first impact surface and the second impact surface is equal to the distance between the front end face and the rear end face of the pad block.

[0009] Optionally, the first impact surface and / or the second impact surface are curved surfaces.

[0010] Optionally, the pad and the stop are connected by an L-shaped arm.

[0011] Optionally, it also includes an outer shell and a front cover, wherein: the outer shell is fitted over the inner shell and has an opening at the front; the front cover covers the opening.

[0012] Optionally, it also includes a sliding groove and a push button, wherein: the sliding groove is formed by a partial absence of the outer casing, and when the stop block slides between the first position and the second position, the protrusion on the upper surface of the stop block moves within the sliding groove; the push button is connected to the protrusion and is located outside the outer casing.

[0013] Optionally, the lateral width of the push button is greater than the lateral length of the sliding groove;

[0014] The outer casing has a notch located at the edge of the opening of the outer casing for the protrusion to be inserted into the sliding groove.

[0015] According to the technical solution of the present invention, a laterally movable stop is provided inside the biopsy gun to change the stroke after the inner needle seat is activated, thereby realizing the adjustment of the biopsy gun's gear position. The structure is simple, the operation is convenient, and it also helps to improve the stability of the biopsy needle. Attached Figure Description

[0016] For illustrative and not limiting purposes, the invention will now be described with reference to preferred embodiments thereof, particularly the accompanying drawings, in which:

[0017] Figure 1 This is a schematic diagram of part of the internal structure of the fully automated biopsy gun capable of file adjustment in an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of one structure of the stop block and the pad block in an embodiment of the present invention;

[0019] Figure 3A This is a schematic diagram of part of the external shape of the fully automated biopsy gun in an embodiment of the present invention.

[0020] Figure 3B This is a schematic diagram of the outer shell and front cover of the fully automated biopsy gun according to an embodiment of the present invention. Detailed Implementation

[0021] In this embodiment of the invention, a laterally movable stop is used to achieve different ranges for the puncture needle. The stop can be switched laterally (with the direction of needle insertion, i.e., the direction of movement when the inner and outer needle seats are activated, as the longitudinal direction, and the lateral movement is perpendicular to this longitudinal direction) between a first position and a second position. When in the first position, the range is longer; when in the second position, it blocks the path of the inner needle seat activation, thus shortening the range. The following description is in conjunction with the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of part of the internal structure of the fully automated biopsy gun capable of adjusting settings according to an embodiment of the present invention. Similar to fully automated biopsy guns in the prior art, the fully automated biopsy gun (hereinafter referred to as "biopsy gun") 100 in this embodiment of the present invention has an inner shell 01 and internal components including an inner needle seat 1, an outer needle seat 2, a connecting rod 3, an outer needle winding button 41, an inner needle winding button 42, a puncture needle assembly (i.e., inner and outer needles) 5, a stop block 6, a pad block 7, and a slide rail 8. The stop block 6 has a groove 60 below it, and the slide rail 8 is a strip-shaped protrusion located in the groove 60, thus engaging with the groove 60.

[0023] Figure 2 This is a schematic diagram of one structure of the stop block and the pad block in an embodiment of the present invention. For example... Figure 2As shown, the stop block 6 is connected to the pad block 7, for example, by using an L-shaped arm 67 as shown in the figure, so that the pad block 7 can move when the stop block 6 is moved. To facilitate moving the stop block 6, a strip-shaped protrusion 61 is provided on the upper surface of the stop block 6 ("upper" and "lower" refer to the view in the figure, the same below), and a push button 9 is fixed on it. The push button 9 can be provided with a longitudinal push bar 91 for easy pushing by hand, and can also be provided with a horizontal arrow-shaped left indicator bar 921 and right indicator bar 922 to indicate that the gear can be adjusted when pushed left or right. The stop block 6 has a first impact surface 62 and a second impact surface 63, which can be arc-shaped surfaces, so that the stop block 6 has better stability when subjected to impact.

[0024] Figure 3A This is a schematic diagram of part of the external shape of the fully automated biopsy gun in an embodiment of the present invention. Figure 3B This is a schematic diagram of the outer casing and front cover of the fully automated biopsy gun according to an embodiment of the present invention. Figure 3A and Figure 3B As shown, during the assembly of the biopsy gun, the outer shell 02 completely covers the inner shell 01 (excluding the outer needle winding button 41 and inner needle winding button 42) and the aforementioned components. During this process, the protrusion 61 enters along the notch 021 of the outer shell 02, and the combination of the stop block 6 and the push button 9 rests at the sliding groove 022 of the outer shell 02. The stop block 6 is located inside the outer shell 02, and the push button 9 is located outside the outer shell 02. Then, the front cover 03 covers the opening 023 of the outer shell 02, and the outer needle winding button 41 and inner needle winding button 42 are inserted into the first hole 031 and the second hole 032 of the front cover 03, respectively, thus forming... Figure 3A The state shown.

[0025] The principle of gear adjustment in the embodiments of the present invention will be explained below. See [link to documentation]. Figure 1 ,exist Figure 1 In the indicated state, the stop block 6 is located at the left end of the slide rail 8, which is the first position; in addition, the stop block 6 can also slide to the right end of the slide rail 8, which is the second position. That is, the stop block 6 can slide back and forth between the first position and the second position.

[0026] When the stop block 6 is in the first position, as shown in the figure, after the inner needle seat 1 is activated, the inner needle seat impact block 11 collides with the linkage impact block 31 of the connecting rod 3, causing the connecting rod 3 to activate the outer needle seat 2. At this time, the front end face 12 of the inner needle seat impacts the first impact surface 62, and the linkage impact block 31 can impact the second impact surface 63. It can be seen that because the slide rail 8 is placed laterally in the impact direction, the stability of the stop block 6 when impacted is improved, thereby improving the stability of the entire biopsy gun.

[0027] When the stop block 6 is in the second position, it lies on the forward path of the inner needle seat front end face 12. Therefore, after the inner needle seat 1 is activated, the front end face 12 can only reach the position of the second impact surface 63, thus reducing the stroke of the inner needle seat 1. In other words, when the stop block 6 is in the first position, the stroke of the inner needle seat 1 is longer, resulting in deeper needle penetration; when the stop block 6 is in the second position, the stroke of the inner needle seat 1 is shorter, resulting in shallower needle penetration. This achieves the adjustment of the puncture setting.

[0028] Because when the stop block 6 is in the second position, the front end face 12 of the inner needle seat can only reach the position of the second impact surface 63, so the inner needle seat impact block 11 cannot reach the linkage impact block 31 at this time. However, at this time, the pad 7 is located between the inner needle seat impact block 11 and the linkage impact block 31. The thickness of the pad 7 in the front-rear direction (i.e., the distance between the front end face 71 and the rear end face 72 of the pad, see...) Figure 2 ) equals the longitudinal distance D between the first impact surface 62 and the second impact surface 63 (see Figure 2 (Note: D in the figure is for illustrative purposes only. The longitudinal spacing here is more accurately the longitudinal spacing between the impacted parts of the first impact surface 62 and the second impact surface 63.) Therefore, the pad block 7 will be impacted by the inner needle seat impact block 11, and then the impact force will be transmitted to the linkage impact block 31 to realize the activation of the outer needle seat 2.

[0029] The technical solution of this invention involves setting a laterally movable stop inside the biopsy gun to change the stroke after the inner needle seat is activated, thereby realizing the adjustment of the biopsy gun's gear position. The structure is simple, the operation is convenient, and it also helps to improve the stability of the biopsy needle.

[0030] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A fully automatic biopsy gun with adjustable settings, comprising an inner housing, an inner needle holder, a connecting rod, and an outer needle holder, characterized in that, The fully automated biopsy gun also includes a slide rail, a stop block, and a pad block connected to the stop block, wherein: The slide rail is located at the bottom of the inner shell, with the needle insertion direction as the longitudinal direction and the slide rail as the transverse direction; The stop block is mounted on the slide rail and can slide from the first position to the second position; When the stop block is in the first position, after the inner needle seat is activated, the inner needle seat block of the inner needle seat collides with the linkage block of the connecting rod, thereby activating the outer needle seat. When the stop block is in the second position, the pad block is located between the inner needle seat impact block and the linkage impact block, and the stop block is located on the forward path of the inner needle seat on the front end face of the inner needle seat after activation; The stop block has a first impact surface and a second impact surface. The first impact surface is located in front of and to the right of the second impact surface. So when the stop block is in the first position, after the inner needle seat is activated, the front end face of the inner needle seat collides with the first impact surface. And when the stop block is in the second position, after the inner needle seat is activated, the front end face of the inner needle seat collides with the second impact surface. Furthermore, the longitudinal distance between the first impact surface and the second impact surface is equal to the distance between the front end face and the rear end face of the pad block.

2. The fully automated biopsy gun according to claim 1, characterized in that, The first impact surface and / or the second impact surface are curved surfaces.

3. The fully automated biopsy gun according to claim 1, characterized in that, The pad and the stop are connected by an L-shaped arm.

4. The fully automated biopsy gun according to any one of claims 1 to 3, characterized in that, It also includes the outer casing and the front cover, wherein: The outer shell is fitted over the inner shell and has an opening at the front; The front cover covers the opening.

5. The fully automated biopsy gun according to claim 4, characterized in that, It also includes a sliding groove and a push button, wherein: The sliding groove is formed by the absence of part of the outer shell. When the stop block slides between the first position and the second position, the protrusion on the upper surface of the stop block moves within the sliding groove. The push button is connected to the protrusion and is located on the outside of the housing.

6. The fully automated biopsy gun according to claim 5, characterized in that, The lateral width of the push button is greater than the lateral length of the sliding groove; The outer casing has a notch located at the edge of the opening of the outer casing for the protrusion to be inserted into the sliding groove.

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