Automated biopsy gun

Abstract

The application provides an automatic biopsy gun, which can trigger an inner needle seat from the tail and the side of the automatic biopsy gun, and is convenient to use in surgery. The automatic biopsy gun comprises an inner shell, a puncture needle assembly, an inner needle seat and a clamping block arranged in the inner shell, a rear push button, a push rod and a button. The rear push button is arranged at the proximal end of the inner shell. The first end of the push rod is connected with the rear push button, and the push rod extends in the needle insertion direction. The second end of the push rod is provided with a push surface and a pressure receiving surface which is arranged in parallel with the inner surface of the inner shell. After the inner needle seat is pulled back, the inclined surface of the locking hook of the inner needle seat is in abutment with the push surface, so that when the push rod advances in the needle insertion direction, the push surface pushes the inclined surface, thereby making the locking hook and the clamping block disengage, and finally triggering the inner needle seat. When the button is pressed in the direction into the inner shell, the second side surface of the button presses the pressure receiving surface of the push rod, thereby driving the push surface to press the inclined surface of the locking hook, so that the locking hook and the clamping block disengage, and finally triggering the inner needle seat.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an automated biopsy gun. 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 the primary tool in this type of ultrasound-guided surgery. Current puncture needles used for biopsies typically employ an inner and outer needle structure as the puncture needle assembly, mounted at the distal end of the inner housing of the automated biopsy gun. Some existing automated biopsy guns include an inner needle seat and an outer needle seat within the inner housing. The inner and outer needle seats are each connected to a spring fitted onto a guide rod. Two guide rods are connected to a guide rod seat, which is fixed to the inner housing. When winding, pressing the inner and outer needle winding buttons compresses the springs, locking the inner and outer needle seats in their respective positions, thus maintaining the spring compression. The inner needle seat is generally locked onto a fixed locking block within the housing. In semi-automatic biopsy guns, the outer needle seat is locked onto a fixed locking block within the housing. The inner needle seat is manually activated (i.e., manually disengaging from the locking block), followed by manual activation of the outer needle seat. In fully automated biopsy guns, the outer needle seat is locked onto the inner needle seat; once the inner needle seat is activated, the outer needle seat is automatically activated as well.

[0004] When using a biopsy gun, the inner needle is first activated to puncture the target area, followed by the activation of the outer needle, which then follows the inner needle. Through the shearing action of the inner and outer needle tips, a portion of the tissue from the target area is cut off and placed in the receiving cavity at the tip of the inner needle. This tissue is then removed along with the puncture needle for biopsy. In actual surgery, surgeons may hold the biopsy gun in various positions, and the aim is to activate the biopsy gun as conveniently as possible in each position. Summary of the Invention

[0005] In view of this, the present invention proposes an automated biopsy gun, in which the inner needle hub can be activated from both the tail and the side, facilitating its use during surgery. The present invention provides the following technical solution:

[0006] An automated biopsy gun includes an inner housing, a puncture needle assembly disposed at the distal end of the inner housing, and an inner needle seat and a locking block disposed within the inner housing. The automated biopsy gun also includes a rear push button, a push rod, and a button, wherein: the rear push button is disposed at the proximal end of the inner housing and forms the end face of the proximal end; a first end of the push rod is connected to the rear push button, and the push rod extends in the needle insertion direction; a second end of the push rod has a pushing surface and a pressure-receiving surface disposed parallel to the inner surface of the inner housing, with an acute angle between the pressure-receiving surface and the pushing surface, the opening of which faces the proximal end of the inner housing; After the inner needle seat is wound, the inclined surface of the locking hook of the inner needle seat abuts against the push surface, so that when the push rod moves in the needle insertion direction, the push surface pushes the inclined surface, thereby disengaging the locking hook from the locking block, and finally activating the inner needle seat; the first side of the button is located outside the inner housing, and the second side is located inside the inner housing. When the button is pressed inward into the inner housing, the second side of the button presses the pressure surface of the push rod, which in turn drives the push surface to press the inclined surface of the locking hook, thereby disengaging the locking hook from the locking block, and finally activating the inner needle seat.

[0007] Optionally, it also includes a spring, the first end of which is connected to the rear push button, and the second end which abuts against a fixing object inside the inner housing; the spring is elastic, and the elastic direction points towards the proximal end of the inner housing.

[0008] Optionally, the automatic biopsy gun also includes a guide rod seat, and the first end of the guide rod seat is connected to the rear push button, and the second end abuts against the guide rod seat; the guide rod seat is elastic, and the elastic direction points towards the proximal end of the inner housing.

[0009] Alternatively, it may also include a guide rod seat, which has a sliding groove, and the surface of the push rod has a protrusion located in the sliding groove and capable of moving back and forth in the needle insertion direction.

[0010] Optionally, the sliding groove is provided with a first wall and a second wall at the front and rear of the needle insertion direction, respectively, so that the forward and backward movement of the protrusion is limited between the first wall and the second wall.

[0011] Optionally, the distal end of the button is connected to the inner housing, and the proximal end of the button is a free end.

[0012] Optionally, the locking hook of the inner needle seat is connected to the elastic arm of the inner needle seat.

[0013] Optionally, the card block is integrally formed with the inner shell.

[0014] According to the technical solution of the present invention, the automatic biopsy gun has a button on its side and a push button at its tail end, both of which can activate the inner needle hub. This allows the surgeon to choose a more suitable activation method from two different parts of the biopsy gun based on the current hand position during the operation, thus facilitating its use. Attached Figure Description

[0015] For illustrative and not limiting purposes, the invention will now be described with reference to preferred embodiments thereof, particularly the accompanying drawings, in which:

[0016] Figure 1A This is a schematic diagram of the main internal structure of the automatic biopsy gun in an embodiment of the present invention.

[0017] Figure 1B This is a schematic diagram of components such as the rear push button in an embodiment of the present invention;

[0018] Figure 2A This is a schematic diagram showing the inner needle seat and the locking block in a locked state in the automatic biopsy gun according to an embodiment of the present invention.

[0019] Figure 2B This is a schematic diagram of the disengaged state of the inner needle seat and the locking block in the automatic biopsy gun according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the appearance of the automatic biopsy gun according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the guide rod seat in an embodiment of the present invention.

[0022] In the picture:

[0023] 0. Automatic biopsy gun; 01. Inner housing; 011. Locking block; 012. Button; 0121. First side; 0122. Second side; 02. Puncture needle assembly; 11. Inner needle winding button; 12. Inner needle seat; 120. Elastic arm; 121. Locking hook; 1211. Hook face; 1212. Inclined surface; 13. Inner needle winding spring; 14. First guide rod; 21. Outer needle winding button; 22. Outer needle seat; 23. Outer needle winding spring; 24. Second guide rod; 31. Rear push button; 310. Pressure surface; 32. Push rod; 320. Free end; 321. Push surface; 322. Pressure surface; 323. Protrusion; 331. First spring; 332. Second spring; 4. Guide rod seat; 41. Push rod groove; 411. First wall; 412. Second wall. Detailed Implementation

[0024] In this embodiment of the invention, the automatic biopsy gun is equipped with a rear push button at the tail and a button on the side. Pushing the rear push button or pressing the button can activate the inner needle seat. The following is a detailed description; the terms "up," "down," "left," and "right" refer to the viewpoint shown in the figures.

[0025] Figure 1A This is a schematic diagram of the main internal structure of the automatic biopsy gun in an embodiment of the present invention. Figure 1A In the automatic biopsy gun 0, the inner needle winding button 11 and the outer needle winding button 21 are cylindrical, and their upper surfaces are pressed to wind the needle. The inner needle seat 12 and the outer needle seat 22 respectively abut against the inner needle winding spring 13 and the outer needle winding spring 23. These two springs are respectively sleeved on the first guide rod 14 and the second guide rod 24. These two guide rods are connected to the guide rod seat 4, which is fixed to the inner housing 01.

[0026] Figure 1A The diagram also shows a puncture needle assembly 02, which, according to its distance from the surgeon during surgery, is located at the distal end of the inner housing 01; correspondingly, the rear push button 31 is located at the tail end of the automated biopsy gun 0, i.e., at the proximal end. The pressure surface 310 of the rear push button 31 also serves as the proximal end face of the automated biopsy gun 0. See also... Figure 1B , Figure 1B This is a schematic diagram of the rear push button and other components in an embodiment of the present invention. The components connected to the rear push button 31 include a push rod 32, a first spring plate 331, and a second spring plate 332. The function of these two spring plates is to allow the rear push button 31 to retract elastically after being pushed forward (i.e., into the inner housing 01, in the direction of needle insertion).

[0027] Figure 2A This is a schematic diagram showing the inner needle seat and the locking block in a locked state in the automatic biopsy gun according to an embodiment of the present invention. Figure 2B This is a schematic diagram showing the disengaged state of the inner needle seat and the locking block in the automatic biopsy gun according to an embodiment of the present invention. Figure 2A As shown, during winding, because the elastic arm 120 of the inner needle seat 12 is elastic, when the inner needle seat 12 moves from right to left, the locking hook 121 of the inner needle seat 12 can bypass the locking block 011, and the hook surface 1211 abuts against the left side of the locking block 011, thereby engaging the locking hook 121 with the locking block 011. It can be seen that to disengage the locking hook 121 from the locking block 011, the locking hook 121 needs to move downwards. The locking block 011 can be integrally formed with the inner shell 01, both being made of metal or plastic. The locking block 011 needs to withstand the pressure from the spring, and integral forming makes the locking block 011 more secure.

[0028] Pressing the push button 31 activates the inner needle seat 12, as explained below. The free end 320 of the push rod 32 is hook-shaped, having a push surface 321 that abuts against the inclined surface 1212 of the locking hook 121 and a pressure surface 322 parallel to the inner surface of the inner housing 01. When the push button 31 is pressed to move the push rod 32 to the right, because the inclined surface 1212 and the push surface 321 are perpendicular to the needle insertion direction ( Figure 2A or Figure 2B The two sides intersect diagonally to the right, so when the push surface 321 moves to the right, it will squeeze the inclined surface 1212 to the right and move downward at the same time, so that the locking hook 121 and the locking block 011 will disengage. At this time, the inner needle seat 12 will move to the right due to the action of the inner needle upper string spring 13, which realizes the activation of the inner needle seat 12.

[0029] Figure 2A and Figure 2B Button 012 is also shown. Pressing button 012 can also activate the inner needle seat 12, as explained below. One end of button 012 is connected to the inner housing 01, and the other end is a free end. The first side 0121 of button 012 is located outside the inner housing 01, and the second side 0122 is located inside the inner housing and aligned with the pressure surface 322 of the free end 320 of push rod 32. Therefore, when button 012 is pressed, it directly causes the free end 320 to move downward, thereby causing the locking hook 121 of the inner needle seat 12 to move downward and disengage from the locking block 011. At this time, the inner needle seat 12 will move to the right due to the action of the inner needle upper string spring 13, thus activating the inner needle seat 12.

[0030] As can be seen from the above description, the automatic biopsy gun 0 has two operable parts to activate the inner needle seat 12: one at the tail end and the other on the side. Figure 3 As shown, Figure 3 This is a schematic diagram of the appearance of the automatic biopsy gun according to an embodiment of the present invention. The automatic biopsy gun 0 has a button 012 on its side and a push button 31 at its tail end.

[0031] Regarding the sliding of push rod 32 within the inner housing 01, push rod 32 can be confined within a certain range. See [link / reference] Figure 4 , Figure 4 This is a schematic diagram of the guide rod seat according to an embodiment of the present invention. A push rod groove 41 is provided within the guide rod seat 4, and the push rod groove 41 has a first wall 411 and a second wall 412 respectively arranged front and rear in the needle insertion direction. Correspondingly, the push rod 32 is provided with a protrusion 323 (see...). Figure 1BThe protrusion 323 is embedded in the push rod groove 41 and can move between the first wall 411 and the second wall 412. This allows the push rod 32 to move while being subject to certain limitations, thus helping to ensure the stability of the overall structure of the biopsy gun. Alternatively, the push rod 32 can be configured in other ways, such as moving the protrusion 323 in a groove on other structures within the inner housing 01, or moving in a groove on the inner surface of the inner housing 01.

[0032] According to the technical solution of this invention, the automatic biopsy gun has a button on its side and a push button at its tail, both of which can activate the inner needle hub. This allows the surgeon to choose a more suitable activation method from two different parts of the biopsy gun based on their current hand position during the procedure, thus facilitating use. This solution is applicable to both semi-automatic and fully automatic biopsy guns.

[0033] 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. An automatic biopsy gun, comprising an inner housing, a puncture needle assembly disposed at the distal end of the inner housing, and an inner needle seat and a retaining block disposed within the inner housing, characterized in that, The automated biopsy gun also includes a rear push button, a push lever, and a button, wherein: The rear push button is located at the proximal end of the inner housing and forms the end face of the proximal end; The first end of the push rod is connected to the rear push button, and the push rod extends in the needle insertion direction; The second end of the push rod has a pushing surface and a pressure-receiving surface arranged parallel to the inner surface of the inner housing. An acute angle is formed between the pressure-receiving surface and the pushing surface, and the opening of the acute angle faces the proximal end of the inner housing. After the inner needle seat is wound, the inclined surface of the locking hook of the inner needle seat abuts against the push surface, so that when the push rod moves in the needle insertion direction, the push surface pushes the inclined surface, thereby disengaging the locking hook from the locking block and ultimately activating the inner needle seat; The first side of the button is located outside the inner housing, and the second side is located inside the inner housing. When the button is pressed into the inner housing, the second side of the button presses the pressure surface of the push rod, which in turn drives the push surface to press the inclined surface of the locking hook, thereby disengaging the locking hook from the locking block and ultimately activating the inner needle seat. The automatic biopsy gun also includes a spring clip, the first end of which is connected to the rear push button, and the second end of which abuts against a fixed object inside the inner housing. The spring is elastic, and the elastic direction points towards the proximal end of the inner shell; The automatic biopsy gun also includes a guide rod seat, which has a sliding groove. The surface of the push rod has a protrusion located in the sliding groove and can move back and forth in the needle insertion direction.

2. The automatic biopsy gun according to claim 1, characterized in that, The sliding groove is provided with a first wall and a second wall at the front and rear of the needle insertion direction, respectively, so that the forward and backward movement of the protrusion is limited between the first wall and the second wall.

3. The automatic biopsy gun according to claim 1, characterized in that, The distal end of the button is connected to the inner housing, and the proximal end of the button is a free end.

4. The automatic biopsy gun according to claim 1, characterized in that, The locking hook of the inner needle seat is connected to the elastic arm of the inner needle seat.

5. The automatic biopsy gun according to claim 1, characterized in that, The card block is integrally formed with the inner shell.

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