A disposable cytological biopsy needle

Abstract

The present invention relates to the technical field of medical supplies, and in particular to a disposable cytological biopsy needle. The biopsy needle comprises an inner needle assembly and an outer needle assembly, wherein the outer needle assembly comprises an outer needle seat, the inner needle assembly comprises an inner needle seat, a protruding hand position is provided in the middle of the outer wall of the outer needle seat, and the puncture needle further comprises an automatic pop-up assembly; the automatic pop-up assembly comprises an elastic member and a dial button for triggering the elastic member to pop out, one end of the elastic member abuts against the hand position, and the other end abuts against the inner needle seat, and the dial button is connected to the outer needle seat; when the elastic member pops out, it pushes the inner needle seat to move away from the hand position, so that the inner needle core moves into the outer needle tube, so that the outer needle tube located between the end of the outer needle tube and the end of the inner needle core forms a sampling space. The disposable cytological biopsy needle provided by the present invention has an automatic pop-up assembly, and during surgery, the doctor can complete the adjustment and triggering operation of the biopsy needle with one hand, which can reduce the personnel configuration during surgery and improve the doctor's work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of medical supplies, in particular to a disposable cytological biopsy needle for biopsy operations of thyroid, liver, pancreatic lymph nodes and the like. Background Art

[0002] Thyroid nodules are a common thyroid disease. During detection, a thyroid nodule biopsy is required to remove the corresponding thyroid cells for testing to further determine whether the nodule is benign or malignant. Thyroid needle aspiration biopsy is a highly accurate diagnostic method and is currently widely used in the diagnosis of nodular thyroid disease.

[0003] The thyroid puncture needle consists of an inner needle core and an outer needle tube. During biopsy, with the assistance of ultrasound equipment, the needle tip of the puncture needle is inserted into the nodule. At this time, the doctor holds the outer needle seat with one hand to keep the position unchanged, and operates the ultrasound probe with the other hand. The doctor's assistant pulls out the inner needle core a short distance or directly pulls it out. Then the doctor holds the outer needle seat and performs reciprocating punctures at the nodule site (usually more than 5 times), so that the cells at the nodule enter the tube body of the outer needle. After the puncture is completed, the puncture needle is pulled out and the cells are taken out for laboratory analysis; the above surgical process is repeated and multiple thyroid nodule puncture operations are performed.

[0004] The existing puncture operation requires at least the cooperation of a doctor and an assistant to complete, which not only has inconvenient operation methods, but also results in a certain waste of medical resources. Summary of the invention

[0005] In view of this, the present invention provides a disposable cytological biopsy needle with an automatic pop-up component. During surgery, the doctor can adjust and trigger the biopsy needle with one hand, which can reduce the staffing during surgery and improve the doctor's work efficiency.

[0006] One aspect of the present invention provides a disposable cytological biopsy needle, comprising an inner needle assembly and an outer needle assembly, the outer needle assembly comprising an outer needle seat, the inner needle assembly comprising an inner needle seat, a protruding hand position being provided in the middle of an outer wall of the outer needle seat, and the puncture needle further comprising an automatic pop-up assembly; the automatic pop-up assembly comprising an elastic member and a dial button for triggering the elastic member to pop out, one end of the elastic member abutting against the hand position, the other end abutting against the inner needle seat, and the dial button being connected to the outer needle seat; when the elastic member pops out, it pushes the inner needle seat to move away from the hand position, causing the inner needle core to move into the outer needle tube, thereby forming a sampling space for the outer needle tube located between the end of the outer needle tube and the end of the inner needle core.

[0007] Optionally, the elastic member is a spring, and the spring is sleeved on the outer needle seat; the inner needle seat is provided with two parallel extension rods extending outward along the axis direction of the inner needle seat toward one end of the spring; one end of the spring abuts against the hand position, and the other end is connected to the support plate, which is annularly sleeved on the outer needle seat, and the support plate abuts against the free end of the extension rod.

[0008] Optionally, the support plate includes a front support plate and a rear support plate, and the front support plate and the rear support plate are butt-jointed to form an annular structure.

[0009] Optionally, the automatic pop-up assembly also includes a sealing member; the sealing member is arranged at the end of the outer wall of the outer needle seat, the spring and the support sheet can move between the hand position and the sealing member, and there are two notches on the sealing member, and the free ends of the extension rod pass through the two notches respectively and then abut against the support sheet; the free end of the extension rod is provided with a hook, and the spring pops out to make the hook abut against the inner wall of the sealing member to prevent the inner needle seat from separating from the support sheet.

[0010] Optionally, the spring is always in a compressed state within the travel between the hand position and the blocking member.

[0011] Optionally, the sealing member is a locking thread protruding from the outer wall of the outer needle seat.

[0012] Optionally, the automatic pop-up assembly also includes a cylindrical cover plate, which is sleeved on the outer needle seat between the hand position and the sealing member, and a gap is provided between the cover plate and the outer wall of the outer needle seat, and the spring and the support sheet are arranged in the gap; the dial button is arranged on the cover plate, and the cover plate has a through hole, and the dial button has an elastic arm, one end of the elastic arm is connected to the side wall of the through hole, and the other end is provided with a dial part and a protruding structure, the dial part is located on the outer side of the cover plate, and the protruding structure is located on the inner side of the cover plate; a buckle is provided on the support sheet, and the buckle is engaged with the protruding structure to keep the spring in a compressed state.

[0013] Optionally, the cover plate includes a left cover plate and a right cover plate, the dial button is arranged on the left cover plate or the right cover plate, and the left cover plate and the right cover plate are connected to form a cylindrical shape; a plug is provided at one end of the left cover plate and the right cover plate facing the hand position, and a socket corresponding to the plug is provided on the hand position, and the plug is plugged into the socket so that the end of the left cover plate and the right cover plate is in contact with the hand position.

[0014] Optionally, a gap is provided between the mating surfaces of the left cover plate and the right cover plate, so that the cover plate has two guide channels parallel to the axial direction of the spring; the guide channels are connected with the two notches on the sealing member, two raised sliders are provided on the support plate and are respectively located in the guide channels, and the extension rod is located in the guide channel and abuts against the raised sliders.

[0015] Optionally, one end of the outer needle hub away from the outer needle tube is a Luer connector.

[0016] The disposable cytological biopsy needle provided by the present invention has an automatic ejection component. During surgery, the doctor can complete the adjustment and triggering operation of the biopsy needle with one hand, which can reduce the personnel configuration during surgery and improve the doctor's work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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:

[0018] Figure 1 A schematic structural diagram of a disposable cytological biopsy needle provided in an embodiment of the present invention;

[0019] Figure 2 An exploded view of a disposable cytological biopsy needle provided in an embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of the structure of the outer needle assembly;

[0021] Figure 4 is a schematic diagram of the structure of the inner needle assembly;

[0022] Figure 5 It is a schematic diagram of the structure of the outer needle tube and the inner needle core end;

[0023] Figure 6 It is a structural schematic diagram of the outer needle seat;

[0024] Figure 7 It is a structural schematic diagram of the left cover;

[0025] Figure 8 It is a structural schematic diagram of the inner needle seat.

[0026] In the figure:

[0027] 1: outer needle tube; 2: inner needle core; 3: outer needle seat; 4: left cover; 5: rear support plate; 6: spring; 7: inner needle seat; 8: front support plate; 9: right cover; 10: sampling space; 31: left pressing position; 32: right pressing position; 33: locking thread; 34: Luer connector; 41: dial button; 71: front hook; 72: rear hook; 73: extension rod; 411: raised structure; 412: toggle part. DETAILED DESCRIPTION

[0028] In an embodiment of the present invention, an automatic pop-up component is added to the outer needle seat. After the button is triggered, the inner needle seat can be automatically popped out under the action of the elastic member. The doctor can complete the operation alone without the cooperation of others, thereby reducing the number of personnel in the operation and improving the doctor's work efficiency. This is explained in detail below.

[0029] Figure 1A schematic structural diagram of a disposable cytological biopsy needle provided in an embodiment of the present invention; Figure 2 An exploded view of a disposable cytological biopsy needle provided in an embodiment of the present invention; Figure 3 is a schematic diagram of the structure of the outer needle assembly; Figure 4 Figure 2 is a schematic diagram of the structure of the inner needle assembly. Figures 1 to 4 As shown, the biopsy needle is used for puncture sampling surgery, such as thyroid puncture surgery. The biopsy needle includes an inner needle assembly and an outer needle assembly. The inner needle assembly is composed of an inner needle seat 7 and an inner needle core 2, and the outer needle assembly is composed of an outer needle seat 3, an outer needle tube 1 and an automatic pop-up assembly, wherein the automatic pop-up assembly includes a left cover plate 4, a right cover plate 9, a front support plate 8, a rear support plate 5 and a spring 6.

[0030] like Figure 2 As shown, in the embodiment of the present invention, the elastic member is a spring 6, which is sleeved on the outer needle seat 3; the inner needle seat 7 is provided with two parallel extension rods 73 extending outward along the axis direction of the inner needle seat 7 at one end facing the spring 6; one end of the spring 6 abuts against the hand position, and the other end is connected to the support sheet, which is annular and formed by the front support sheet 8 and the rear support sheet 5, and the annular support sheet is sleeved on the outer needle seat 3, and the support sheet abuts against the free end of the extension rod 73. The elastic member adopts a spring 6 structure, which can be sleeved on the outer needle seat 3, and the spring 6 has the advantages of long service life and stable resilience. The support sheet adopts a split structure to facilitate assembly operation.

[0031] Figure 6 It is a structural schematic diagram of the outer needle seat; Figure 8 is a schematic diagram of the structure of the inner needle seat; Figure 6 and Figure 8 As shown, the automatic pop-up assembly also includes a blocking member; the blocking member is arranged at the end of the outer wall of the outer needle seat 3, the spring 6 and the support sheet can move between the hand position and the blocking member, there are two notches on the blocking member, the free ends of the extension rod 73 respectively pass through the two notches and then abut against the support sheet; the free end of the extension rod 73 is provided with a hook, the spring 6 pops out to make the hook abut against the inner wall of the blocking member to prevent the inner needle seat 7 from separating from the support sheet. Preferably, the blocking member is a locking thread 33 protruding from the outer wall of the outer needle seat 3, the locking thread 33 is convenient for locking connection with other medical devices, such as, when sampling, the syringe is locked and connected to the outer needle seat 3 through the locking thread 33. The blocking member has a limiting effect on the spring 6, when the spring 6 rebounds, the hook on the extension rod 73 is connected to the locking thread 33 and cannot continue to move, so as to prevent the inner needle seat 7 from leaving the travel range. Among them, within the travel between the hand position and the sealing member, the spring 6 is always in a compressed state. The spring 6 in the compressed state can maintain the rebound force applied to the inner needle seat 7 to ensure that the purpose of driving the inner needle seat 7 is achieved.

[0032] Figure 7 Schematic diagram of the structure of the left cover plate 4; Figure 7 As shown, the automatic pop-up assembly also includes a cylindrical cover plate, which is sleeved on the outer needle seat 3 between the hand position and the sealing member, and a gap is provided between the cover plate and the outer wall of the outer needle seat 3, and the spring 6 and the support sheet are arranged in the gap; a dial button 41 is arranged on the cover plate, and the cover plate has a through hole, and the dial button 41 has an elastic arm, one end of the elastic arm is connected to the side wall of the through hole, and the other end is provided with a toggle portion 412 and a protruding structure 411, the toggle portion 412 is located on the outer side of the cover plate, and the protruding structure 411 is located on the inner side of the cover plate; a buckle is provided on the support sheet, and the buckle is engaged with the protruding structure 411 to keep the spring 6 in a compressed state. The cover plate includes a left cover plate 4 and a right cover plate 9, a dial button 41 is arranged on the left cover plate 4 or the right cover plate 9, and the left cover plate 4 and the right cover plate 9 are connected to form a cylindrical shape; a plug is arranged at one end of the left cover plate 4 and the right cover plate 9 facing the hand position, and a socket corresponding to the plug is arranged on the hand position, and the plug is plugged into the socket, so that the end of the left cover plate 4 and the right cover plate 9 is in contact with the hand position. The cover plate adopts a split structure to facilitate assembly operation.

[0033] like Figure 1 and Figure 3 As shown, a gap is provided between the butt joint surfaces of the left cover plate 4 and the right cover plate 9, so that the cover plate has two guide channels parallel to the axial direction of the spring 6; the guide channels are connected with the two notches on the sealing member, and the support sheet is provided with two raised sliders and are respectively located in the guide channels, and the extension rod 73 is located in the guide channels and abuts against the raised sliders. The extension rod 73 slides in the guide channels, and the guide channels are provided to facilitate the quick connection between the extension rod 73 and the outer needle seat 3. At the same time, the raised slider on the support sheet is provided in the guide channels, which can prevent the support sheet and the spring 6 from rotating, and reduce the probability of the dial button 41 being opened by mistake.

[0034] When the biopsy needle provided in the embodiment of the present invention is used, with the assistance of imaging equipment, the assembled inner needle assembly and outer needle assembly are punctured to a specified position. At this time, under the action of the automatic ejection assembly, the inner needle seat 7 is ejected outward by a certain stroke, thereby driving the inner needle core 2 to move outward synchronously. Figure 5 It is a schematic diagram of the structure of the outer needle tube and the inner needle core end, as shown in Figure 5 As shown, after the inner needle core 2 moves a certain distance, the needle tip of the biopsy needle forms a sampling space 10. The doctor holds the biopsy needle and performs reciprocating puncture (generally more than 5 times). Some cells in the nodule remain in the sampling space 10. The biopsy needle is pulled out, and the nodule cells in the sampling space 10 are taken out for medical analysis.

[0035] The following is a specific operation method of the biopsy needle provided in an embodiment of the present invention: first, assemble the outer needle assembly and the inner needle assembly, that is, the inner needle core 2 is inserted into the outer needle tube 1 through the Luer connector 34 of the outer needle seat 3, and the extension rod 73 on the inner needle seat 7 has a certain deformation ability. The extension rod 73 is pulled outward, and then the hook of the extension rod 73 (a front hook 71 is provided on one extension rod 73, and a rear hook 72 is provided on the other extension rod 73) is first extended from the guide channel into the gap between the cover plate and the outer needle seat 3, and then the extension rod 73 is retained in the guide channel. The inner needle seat 7 is pushed to move toward the outer needle seat 3, and the free end of the extension rod 73 abuts against the support plate. The thrust is transmitted from the support plate to the spring 6, and the spring 6 is compressed under the action of the thrust. At the same time, the support plate synchronizes the spring 6 to move toward the outer needle seat 3. When the support plate moves to the position of the dial button 41, the buckle on the support plate is engaged with the raised structure 411 of the dial button 41, and a "click" sound is emitted when engaged. At this time, the assembly between the inner needle assembly and the outer needle assembly is completed.

[0036] After the inner needle assembly and the outer needle assembly are assembled, the puncture operation can be performed. During the operation, the doctor operates the ultrasonic probe with one hand, and the thumb and middle finger of the other hand respectively hold the left pressing position 31 and the right pressing position 32 of the outer needle seat 3, and the index finger is attached to the toggle portion 412 of the dial button 41. After the puncture position is determined under the guidance of the ultrasonic probe, the thumb and middle finger hold the outer needle seat 3, and the biopsy needle is inserted into the patient's thyroid nodule along the needle tip direction, so that the needle tip is located in the nodule. At this time, the index finger triggers the toggle portion 412, so that the protruding structure 411 of the dial button 41 is separated from the buckle of the support sheet, and the compressed spring 6 rebounds to push the support sheet to move, and the rebound force acts on the extension rod 73, driving the inner needle seat 7 to move in the opposite direction. Finally, the hook on the extension rod 73 is connected to the locking thread 33, and the inner needle seat 7 stops moving. At this time, since the spring 6 is still in a rebound state, the rebound force continues to be applied to the support sheet, so that the inner needle seat 7 remains in this position unchanged. The inner needle seat 7 drives the inner needle core 2 to move in the opposite direction for a certain distance, so that a vacuum sampling space 10 is formed between the inner needle core 2 and the outer needle tube 1 .

[0037] The doctor holds the outer needle holder 3 and aspirates back and forth along the needle tip for at least 5 cycles. The cells from the thyroid nodule enter the sampling space 10 due to the reciprocating motion and the existence of negative pressure. At this point, the sampling operation is completed, the biopsy needle is pulled out of the thyroid gland, the extension rod 73 is pulled to separate the inner needle holder 7 from the outer needle holder 3, and then the syringe is connected to the Luer connector 34 to take out the cells in the sampling space 10 and store them in a designated test container for testing. At this point, one puncture is completed, and when a second or more puncture operations are required, the above puncture operation process is repeated.

[0038] 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 cytological biopsy needle, comprising an inner needle assembly and an outer needle assembly, wherein the outer needle assembly comprises an outer needle seat (3), the inner needle assembly comprises an inner needle seat (7), a protruding hand position is provided in the middle of the outer wall of the outer needle seat (3), and the characteristics are as follows: The biopsy needle also includes an automatic ejection assembly; The automatic ejection assembly comprises an elastic member and a dial button (41) for triggering the elastic member to eject, one end of the elastic member abuts against the hand position, and the other end abuts against the inner needle seat (7), and the dial button (41) is connected to the outer needle seat (3); When the elastic member pops out, it pushes the inner needle seat (7) to move away from the hand position, so that the inner needle core (2) moves into the outer needle tube (1), so that the outer needle tube (1) between the end of the outer needle tube (1) and the end of the inner needle core (2) forms a sampling space, and the sampling space is used to retain cells sampled by the puncture operation; The elastic member is a spring (6), and the spring (6) is sleeved on the outer needle seat (3); One end of the inner needle seat (7) facing the spring (6) is provided with two parallel extension rods (73) extending outwardly along the axis direction of the inner needle seat (7); One end of the spring (6) is in contact with the hand position, and the other end is connected to a support sheet, the support sheet is annularly sleeved on the outer needle seat (3), and the support sheet is in contact with the free end of the extension rod (73).

2. The disposable cytological biopsy needle according to claim 1, characterized in that: The support plate comprises a front support plate (8) and a rear support plate (5), and the front support plate (8) and the rear support plate (5) are butt-jointed to form an annular structure.

3. The disposable cytological biopsy needle according to claim 1, characterized in that: The automatic pop-up assembly also includes a sealing member; The sealing member is arranged at the end of the outer wall of the outer needle seat (3); the spring (6) and the support sheet can move between the hand position and the sealing member; the sealing member has two notches; the free ends of the extension rod (73) respectively pass through the two notches and then abut against the support sheet; A hook is provided at the free end of the extension rod (73), and the spring (6) pops out to cause the hook to abut against the inner wall of the sealing member, thereby preventing the inner needle seat (7) from separating from the support sheet.

4. The disposable cytological biopsy needle according to claim 3, characterized in that: In the travel between the hand position and the blocking member, the spring (6) is always in a compressed state.

5. The disposable cytological biopsy needle according to claim 3, characterized in that: The sealing member is a locking thread (33) protruding from the outer wall of the outer needle seat (3).

6. The disposable cytological biopsy needle according to claim 3, characterized in that: The automatic ejection assembly further comprises a cylindrical cover plate, the cover plate being sleeved on the outer needle seat (3) between the hand position and the blocking member, a gap being provided between the cover plate and the outer wall of the outer needle seat (3), and a spring (6) and a support sheet being provided in the gap; The dial button (41) is arranged on the cover plate, the cover plate has a through hole, the dial button (41) has an elastic arm, one end of the elastic arm is connected to the side wall of the through hole, and the other end is provided with a dial portion (412) and a protruding structure (411), the dial portion (412) is located on the outside of the cover plate, and the protruding structure (411) is located on the inside of the cover plate; The support sheet is provided with a buckle, which is engaged with the protruding structure (411) so as to keep the spring (6) in a compressed state.

7. The disposable cytological biopsy needle according to claim 6, characterized in that: The cover plate comprises a left cover plate (4) and a right cover plate (9), the dial button (41) is arranged on the left cover plate (4) or the right cover plate (9), and the left cover plate (4) and the right cover plate (9) are butt-jointed to form a cylindrical shape; A plug is provided at one end of the left cover plate (4) and the right cover plate (9) facing the hand position, and a socket corresponding to the plug is provided on the hand position. The plug is plugged into the socket so that the ends of the left cover plate (4) and the right cover plate (9) are in contact with the hand position.

8. The disposable cytological biopsy needle according to claim 7, characterized in that: A gap is provided between the butt joint surfaces of the left cover plate (4) and the right cover plate (9), so that the cover plate has two guide channels parallel to the axial direction of the spring; The guide channel is connected to the two notches on the sealing member, the support sheet is provided with two raised sliders which are respectively located in the guide channel, and the extension rod (73) is located in the guide channel and abuts against the raised sliders.

9. The disposable cytological biopsy needle according to any one of claims 1 to 8, characterized in that: The end of the outer needle seat away from the outer needle tube is a Luer connector (34).

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