CN116784890A - Biopsy needle capable of being operated by one hand - Google Patents

Abstract

The invention belongs to the technical field of biopsy needles, in particular to a biopsy needle capable of being operated by one hand, which comprises an outer needle mounting block, wherein an outer needle cylinder is embedded in the outer needle mounting block, an inner needle mounting block is connected to the top end of the outer needle mounting block through threads, an inner needle structure is arranged in the inner needle mounting block, a limit structure and a buffer structure are respectively arranged on two sides of the inner needle mounting block, the limit structure and the buffer structure are matched with the inner needle structure, a distance adjusting mounting block is connected to the top end of the inner needle mounting block through threads, and a distance adjusting structure is arranged in the distance adjusting mounting block; when the invention is used, the limit of the inner needle structure can be canceled through the limit structure, so that the inner needle structure is jacked by the negative pressure spring, negative pressure is formed in the outer needle cylinder, and when the inner needle structure is jacked, the jacked speed of the inner needle structure by the negative pressure spring can be controlled through a mode of propping against the buffer structure by fingers, thereby controlling the speed of the outer needle cylinder for extracting human tissues, and avoiding causing discomfort to the human body.

Description

A biopsy needle that can be operated with one hand

Technical field

The invention belongs to the technical field of biopsy needles, and particularly relates to a biopsy needle that can be operated with one hand.

Background technique

In the biopsy operation, it is necessary to puncture the biopsy needle to the target location with the assistance of ultrasound, then pull out the inner needle, and then rely on the siphon effect or the negative pressure of the syringe to suck the tissue into the biopsy needle, and then pull the puncture needle out of the human body and pass it through The syringe pushes out the tissue from the biopsy needle and obtains the tissue to complete the biopsy. During the operation, the doctor needs to hold the ultrasound probe with one hand and control the biopsy needle with the other hand. Since the syringe requires a suction action, it is difficult for a single person to complete the operation;

The negative pressure biopsy needle disclosed in Chinese Patent Announcement No. CN115414077A can eject the piston rod under the action of a spring, causing negative pressure to be generated in the needle barrel, sucking human tissue into the biopsy needle, and the piston rod can be ejected by pressing the button. It is easy to operate. It is suitable for one-handed operation, but the tissue is extracted by popping up the piston rod with a spring. Due to the rapid initial deformation speed of the spring, the biopsy needle initially extracts tissue quickly, which can easily cause discomfort to the patient.

Therefore, it is necessary to invent a biopsy needle that can be operated with one hand to solve the above problems.

Contents of the invention

In view of the above problems, the present invention provides a biopsy needle that can be operated with one hand to solve the problems raised in the above background art.

In order to achieve the above object, the present invention provides the following technical solution: a biopsy needle that can be operated with one hand, including an outer needle mounting block, and an outer needle barrel is embedded in the interior of the outer needle mounting block. The top end is threadedly connected with an inner needle mounting block. An inner needle structure is installed inside the inner needle mounting block. A limiting structure and a buffering structure are respectively installed on both sides of the inner needle mounting block. The limiting structure and the buffering structure are both Matching the inner needle structure, the top end of the inner needle mounting block is threadedly connected to a pitch-adjustable mounting block. A pitch-adjusting structure is installed inside the pitch-adjusting mounting block. The top of the pitch-adjusting structure is inserted into the pitch-adjusting mounting block. The top end is fixedly connected with an operating lever.

Preferably, a top block is fixed on the top of the outer needle barrel, and a baffle ring is fixed on the inside of the inner needle mounting block. The bottom end of the baffle ring abuts the top of the top block, and the top of the baffle ring is fixed on the top. Fixed connection with negative pressure spring.

Preferably, the inner needle structure includes an inner needle bar. The bottom end of the inner needle bar is inserted through the negative pressure spring, the retaining ring and the outer needle barrel in sequence, and its end extends to the outside. The top end of the inner needle bar is fixed. The cover is connected with a cover tube, the inner side of the cover tube is connected with the outside of the negative pressure spring, the outside of the cover tube is fixedly connected with a plurality of limit rings at equal intervals, and the top of the cover tube is fixedly connected with a buffer connection block .

Preferably, the limiting structure includes a clamping plate, the shape of the clamping plate is a special shape, the two sides of the top of the clamping plate are rotatably connected to both sides of the inner wall of the inner needle mounting block, and the bottom end of the clamping plate is connected to the inner wall of the inner needle mounting block. The limit ring on the top of the cover tube matches. The side end of the clamping plate is hinged with a connecting plate. One end of the connecting plate is hinged with a sliding plate. Both sides of the sliding plate are respectively with both sides of the inner wall of the inner needle mounting block. Sliding connection, one side of the sliding plate is fixedly connected with a limited sliding rod, one end of the limited sliding rod penetrates one side of the inner needle installation block, and the two sides of the limited sliding rod and the inner wall of the inner needle installation block Side slide fit.

Preferably, the buffer structure includes a buffer sliding block, one side of the buffer sliding block fits the other side of the inner needle installation block, and a buffer screw is threaded into the other side of the buffer sliding block. One end of the screw is inserted into the interior of the inner needle installation block, and its end is threaded into the buffer connection block. A buffer baffle is connected to the buffer screw, and the buffer screw slides with both sides of the inner wall of the inner needle installation block. fit.

Preferably, the pitch-adjusting structure includes a rotating drum, and the rotating drum is rotationally embedded inside the pitch-adjusting installation block. The bottom end of the rotating drum is threaded with a pitch-adjusting stop block, and the pitch-adjusting stop block is threadedly engaged. The bottom end matches the structure of the inner needle. The bottom end on one side of the distance-adjusting block is fixedly connected with a distance-adjusting limit bar. The distance-adjusting limit bar slides and fits with both sides of the inner wall of the inner needle mounting block, so The rotating drum is provided with a distance-adjusting limit groove, and a distance-adjusting slide bar is provided in the distance-adjusting limit groove. The distance-adjusting slide bar is slidingly connected to the distance-adjusting installation block, and one end of the distance-adjusting slide bar One side of the interspersed distance-adjustable mounting block extends to the outside.

Preferably, an observation window is installed on the inner needle mounting block, the observation window matches the distance-adjustable limit strip, and scale marks are painted on both sides of the observation window.

Preferably, the operating lever is composed of a connecting part and an operating part in order from bottom to top, the operating part is T-shaped, and the direction of the operating part is perpendicular to the direction of the limiting structure and the buffering structure.

Technical effects and advantages of the present invention:

1. When the present invention is in use, the limitation of the inner needle structure can be canceled through the limiting structure, so that the inner needle structure is pushed up by the negative pressure spring, forming a negative pressure in the outer needle barrel, thereby drawing human tissue into the outer needle barrel. When the inner needle structure is bounced, you can use your fingers to resist the buffer structure to control the speed at which the inner needle structure is lifted up by the negative pressure spring, thereby controlling the speed of extracting human tissue to avoid causing discomfort to the human body;

2. The present invention can adjust the distance adjustment structure as needed, and determine whether the distance adjustment structure is fixed to the position of the distance adjustment installation block, so that when necessary, the limitation of the distance adjustment structure and the distance adjustment installation block can be canceled, and the distance adjustment can be made by rotating the operating lever. The structure functions to limit the extreme position at which the inner needle structure is pushed up, and to control the amount of human tissue extracted by the outer needle barrel.

Description of the drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of the overall structure of the present invention;

Figure 2 is a schematic cross-sectional view of the overall structure of the present invention;

Figure 3 is a schematic cross-sectional view of the outer needle mounting block structure of the present invention;

Figure 4 is a schematic cross-sectional view of the structure of the inner needle mounting block of the present invention;

Figure 5 is a schematic cross-sectional view of the structure of the distance-adjustable mounting block of the present invention.

In the picture: 1. Outer needle mounting block; 2. Outer needle barrel; 201. Top block; 3. Inner needle mounting block; 301. Stop ring; 302. Negative pressure spring; 303. Observation window; 4. Inner needle structure; 401. Inner needle bar; 402. Cover barrel; 403. Limiting ring; 404. Buffering connection block; 5. Limiting structure; 501. Clamping plate; 502. Connecting plate; 503. Sliding plate; 504. Limiting sliding rod ; 6. Buffering structure; 601. Buffering sliding block; 602. Buffering screw; 603. Baffle plate; 7. Pitch-adjusting mounting block; 8. Pitch-adjusting structure; 801. Rotary drum; 802. Pitch-adjusting block; 803. Distance-adjusting limit bar; 804, distance-adjusting limit slot; 805, distance-adjusting slide bar; 9. Operating lever.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention;

In the description of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not Any indication or implication that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation should not be construed as a limitation on the invention. In addition, in the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically limited.

The present invention provides a biopsy needle that can be operated with one hand as shown in Figures 1 to 5, including an outer needle mounting block 1. An outer needle barrel 2 is embedded in the outer needle mounting block 1. The top end is threadedly connected with an inner needle installation block 3. An inner needle structure 4 is installed inside the inner needle installation block 3. A limiting structure 5 and a buffer structure 6 are respectively installed on both sides of the inner needle installation block 3. The limiting structure 5 and buffer structure are respectively installed on the top. 6 are matched with the inner needle structure 4. The top of the inner needle installation block 3 is threadedly connected with a pitch-adjustable mounting block 7. The pitch-adjustable mounting block 7 is installed with a pitch-adjusting structure 8 inside. The top of the pitch-adjusting structure 8 is interspersed with the pitch-adjusting installation. The top of block 7 has an operating lever 9 fixedly connected to its end.

The outer needle mounting block 1, the inner needle mounting block 3 and the distance-adjusting mounting block 7 of the present invention all adopt threaded connections, which are easy to disassemble, so that the outer needle barrel 2 and the inner needle structure 4 can be replaced as needed, and they can be replaced during use. The limiting structure 5 cancels the limiting of the inner needle structure 4, so that the inner needle structure 4 is pushed up by the negative pressure spring 302, forming a negative pressure in the outer needle barrel 2, thereby drawing human tissue into the outer needle barrel 2. When the inner needle structure 4 is bounced, you can use your fingers to resist the buffer structure 6 to control the speed at which the inner needle structure 4 is lifted up by the negative pressure spring 302, thereby controlling the speed of extracting human tissue to avoid causing discomfort to the human body; The invention can also adjust the distance-adjusting structure 8 as needed, and determine whether the distance-adjusting structure 8 is fixed to the distance-adjusting installation block 7 so that when necessary, the distance-adjusting structure 8 can be brought into play by rotating the operating rod 9 to limit the inner needle structure 4 The lifted limit position controls the amount of human tissue extracted by the outer syringe 2.

Referring to Figures 1 to 4 of the description, the top of the outer needle barrel 2 is fixedly provided with a top block 201, and the inner needle mounting block 3 is fixedly provided with a blocking ring 301. The bottom end of the blocking ring 301 abuts the top of the top block 201. The top end of the ring 301 is fixedly connected with a negative pressure spring 302; the inner needle structure 4 includes an inner needle bar 401, the bottom end of the inner needle bar 401 is inserted through the negative pressure spring 302, the retaining ring 301 and the outer needle barrel 2 in sequence, and its end extends To the outside, the top end of the inner needle bar 401 is fixedly connected to a cover tube 402. The inside of the cover tube 402 is connected to the outside of the negative pressure spring 302. A plurality of limiting rings 403 are fixedly connected to the outside of the cover tube 402 at equal intervals. The top end of the barrel 402 is fixedly connected with a buffer connection block 404. The bottom end of the cover barrel 402 is at a certain distance from the top end of the retaining ring 301.

Referring to Figures 1, 2 and 4 of the description, the limiting structure 5 includes a clamping plate 501. The clamping plate 501 has a special shape. The two sides of the top of the clamping plate 501 are respectively rotatably connected to both sides of the inner wall of the inner needle mounting block 3. The clamping plate The bottom end of 501 matches the limit ring 403 on the top of the cover barrel 402, and the bottom end of the clamping plate 501 is stuck between the first limit ring 403 and the second limit ring 403 on the top of the cover barrel 402. The clamping plate 501 A connecting plate 502 is hinged to the side end of the connecting plate 502. A sliding plate 503 is hinged to one end of the connecting plate 502. Both sides of the sliding plate 503 are slidingly connected to both sides of the inner wall of the inner needle mounting block 3. One side of the sliding plate 503 is fixedly connected with a limited position. One end of the sliding rod 504 and the limiting sliding rod 504 penetrates through one side of the inner needle mounting block 3 , and the limiting sliding rod 504 slides and fits with both sides of the inner wall of the inner needle mounting block 3 .

When using the present invention, slide the limit sliding rod 504 with your thumb to drive the sliding plate 503 to slide, and then pull the connecting plate 502 to drive the clamping plate 501 to rotate along its top, so that the bottom end of the clamping plate 501 comes out of the limiting ring 403, so that the inner needle structure 4 is no longer limited in position. At this time, the negative pressure spring 302 pushes up the cover barrel 402, and then drives the inner needle bar 401 to move inside the outer needle barrel 2, causing negative pressure to be generated in the outer needle barrel 2 to extract human tissue.

Referring to Figures 1, 2 and 4 of the specification, the buffer structure 6 includes a buffer sliding block 601. One side of the buffer sliding block 601 is in contact with the other side of the inner needle mounting block 3. The other side of the buffer sliding block 601 is threadedly inserted with Buffer screw 602. One end of the buffer screw 602 is inserted into the interior of the inner needle installation block 3, and its end is threaded into the buffer connection block 404. The buffer screw 602 is sleeved with a buffer baffle 603. The buffer screw 602 and the inner needle The two sides of the inner wall of the installation block 3 are slidably fitted.

When the present invention is in use, the middle finger is used to resist the buffer screw 602. When the inner needle structure 4 is pushed up by the negative pressure spring 302, it will not move suddenly and rapidly because it is blocked by the finger. At this time, the middle finger slowly bends, causing the inner needle rod to 401 moves slowly to avoid human discomfort when extracting human tissue, and the fingers do not need to exert lateral pressure on the inner needle installation block 3, so the position of the outer syringe 2 in the human body will not be unstable.

Referring to Figures 1, 2 and 5 of the description, the pitch-adjusting structure 8 includes a rotating drum 801. The rotating drum 801 is rotated and embedded inside the pitch-adjusting installation block 7. The bottom end of the rotating drum 801 is threaded with a pitch-adjusting stop block 802. The bottom end of the distance-adjusting block 802 matches the inner needle structure 4. The bottom end of one side of the distance-adjusting block 802 is fixedly connected with a distance-adjusting limit bar 803. The distance-adjusting limit bar 803 is connected to the inner wall of the inner needle mounting block 3. The two sides slide together, and the rotating drum 801 is provided with a distance-adjusting limit groove 804. The bottom end of the distance-adjusting limit groove 804 is an annular groove, and the top of the distance-adjusting limit groove 804 is a plurality of equally spaced convex grooves. There is a distance adjustment slide bar 805 in the distance limit groove 804. The distance adjustment slide bar 805 is slidingly connected to the distance adjustment installation block 7, and one end of the distance adjustment slide bar 805 is inserted into one side of the distance adjustment installation block 7 and extends to the outside. An observation window 303 is installed on the needle installation block 3. The observation window 303 matches the distance adjustment limit bar 803. Scale marks are painted on both sides of the observation window 303; the operating rod 9 has a connecting part and an operating part in sequence from bottom to top. The shape of the operating part is T-shaped, and the direction of the operating part is perpendicular to the direction of the limiting structure 5 and the buffering structure 6 when they are in the initial position.

When the present invention drills into the human body, the palm of the hand is pressed against the top of the operating rod 9, the index finger and the middle finger clasp the two ends of the T shape to facilitate force exertion, and then the hand position is finely adjusted, and the distance adjustment slider 805 is slid with the thumb to make the distance adjustment slider 805 moves from the convex groove of the distance adjustment limit groove 804 to the ring groove of the distance adjustment limit groove 804, so that the distance adjustment slide bar 805 no longer limits the position of the drum 801, and then repeatedly rotates the palm of the hand slightly, driven by the operating rod 9 The rotating drum 801 rotates, thereby driving the distance-adjusting block 802 to move, controlling the extreme position at which the inner needle structure 4 is pushed up. The distance-adjusting limit bar 803 can be observed through the observation window 303, and the scale mark can be used to accurately control the position of the distance-adjusting block 802. Compared with the traditional biopsy needle, the present invention can be operated with one hand when adjusting the distance, and the position of the outer needle barrel 2 in the human body is stable during the distance adjustment.

Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these Modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of each embodiment of the present invention.

Claims (8)

1. A biopsy needle operable with one hand, comprising an outer needle mounting block (1), characterized in that: the utility model discloses a needle structure, including outer needle installation piece (1), inner needle installation piece (3) internally mounted have inner needle structure (4), limit structure (5) and buffer structure (6) are installed respectively to the both sides of inner needle installation piece (3), limit structure (5) and buffer structure (6) all match with inner needle structure (4), the top threaded connection of inner needle installation piece (3) has pitch adjustment installation piece (7), the internally mounted of pitch adjustment installation piece (7) has pitch adjustment structure (8), the top of pitch adjustment installation piece (7) is alternateed on the top of pitch adjustment structure (8), and its end fixedly connected with action bars (9).

2. A single hand operable biopsy needle as defined in claim 1, wherein: the top of outer cylinder (2) is fixed and is equipped with kicking block (201), the inside of interior needle installation piece (3) is fixed and is equipped with keeps off ring (301), the bottom butt of keeping off ring (301) is on the top of kicking block (201), the top fixedly connected with negative pressure spring (302) of keeping off ring (301).

3. A single hand operable biopsy needle as claimed in claim 2, wherein: the inner needle structure (4) comprises an inner needle bar (401), the bottom end of the inner needle bar (401) is sequentially inserted with a negative pressure spring (302), a baffle ring (301) and an outer needle cylinder (2), the end of the inner needle bar extends to the outside, a cover cylinder (402) is fixedly covered at the top end of the inner needle bar (401), the inner side of the cover cylinder (402) is covered at the outer side of the negative pressure spring (302), a plurality of limiting rings (403) are fixedly sleeved at equal intervals at the outer side of the cover cylinder (402), and a buffer connecting block (404) is fixedly connected at the top end of the cover cylinder (402).

4. A single hand operable biopsy needle according to claim 3, wherein: the limiting structure (5) comprises a clamping plate (501), the shape of the clamping plate (501) is special-shaped, two sides of the top end of the clamping plate (501) are respectively connected with two sides of the inner wall of the inner needle mounting block (3) in a rotating mode, the bottom end of the clamping plate (501) is matched with a limiting ring (403) at the top of the cover cylinder (402), a connecting plate (502) is hinged to the side end of the clamping plate (501), a sliding plate (503) is hinged to one end of the connecting plate (502), two sides of the sliding plate (503) are respectively connected with two sides of the inner wall of the inner needle mounting block (3) in a sliding mode, one side of the sliding plate (503) is fixedly connected with a limiting sliding rod (504), and one end of the limiting sliding rod (504) is inserted into one side of the inner needle mounting block (3) in a sliding mode with two sides of the inner wall of the inner needle mounting block (3).

5. A single hand operable biopsy needle as claimed in claim 2, wherein: the buffer structure (6) comprises a buffer sliding block (601), one side of the buffer sliding block (601) is attached to the other side of the inner needle mounting block (3), a buffer screw (602) is inserted into the other side of the buffer sliding block (601) in a threaded mode, one end of the buffer screw (602) is inserted into the inner portion of the inner needle mounting block (3), the end portion of the buffer screw is inserted into a buffer connecting block (404) in a threaded mode, a buffer baffle (603) is sleeved on the buffer screw (602), and the buffer screw (602) is attached to two sides of the inner wall of the inner needle mounting block (3) in a sliding mode.

6. A single hand operable biopsy needle as defined in claim 1, wherein: the utility model provides a distance adjusting structure (8) includes rotary drum (801), rotary drum (801) rotate the scarf joint inside distance adjusting installation piece (7), the bottom screw thread scarf joint of rotary drum (801) has distance adjusting to support piece (802), the bottom of distance adjusting to support piece (802) and interior needle structure (4) assorted, the bottom fixedly connected with distance adjusting spacing (803) of distance adjusting to piece (802) one side, distance adjusting spacing (803) and the both sides slip laminating of interior needle installation piece (3) inner wall, distance adjusting spacing groove (804) have been seted up on rotary drum (801), be equipped with distance adjusting slider (805) in distance adjusting spacing groove (804), distance adjusting slider (805) and distance adjusting installation piece (7) sliding connection, just one side of distance adjusting slider (805) one side interlude distance adjusting installation piece (7) extends to outside.

7. A single hand operable biopsy needle as defined in claim 1, wherein: an observation window (303) is arranged on the inner needle mounting block (3), the observation window (303) is matched with the distance-adjusting limiting strip (803), and scale marks are coated on two sides of the observation window (303).

8. A single hand operable biopsy needle as defined in claim 1, wherein: the operation rod (9) is sequentially provided with a connecting part and an operation part from bottom to top, the shape of the operation part is T-shaped, and the direction of the operation part is perpendicular to the direction of the limiting structure (5) and the direction of the buffer structure (6).