Cell puncture needle capable of automatically rotating and sucking
By designing a cell puncture needle for automatic rotational aspiration, the combination of the rotary tube body and the fixed tube body is used to realize the automatic operation of rotary needle and negative pressure aspiration, solving the problem of poor suction and complex operation in the prior art. Problem, improving diagnostic accuracy and operational safety.
Patent Information
- Application Number
- CN202421005792.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-10
AI Technical Summary
The existing fine needle aspiration technology is difficult to effectively aspirate tissue cells, resulting in the need for repeated operation, increasing the risk of bleeding, and affecting pathological diagnosis.
A cell puncture needle with automatic rotational suction is designed, including a rotating tube body and a fixed tube body. By setting a piston, pulling elastic member, a clip and a limiting structure, the automatic operation of rotating needle and negative pressure suction is achieved.
It realizes efficient extraction of tissue cells while rotating the needle, reducing the difficulty of operation and bleeding risks, and improving the accuracy of pathological diagnosis.
Smart Images
Figure CN222487462U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cell puncture, in particular to an automatic rotating and aspirating cell puncture needle. Background Art
[0002] The fine needle puncture currently used is generally performed by repeatedly lifting and inserting, using the negative pressure of the syringe or the siphon effect of the needle tube to absorb tissue cells. In the specific operation, because the number of tissue cells obtained each time is small, it is difficult to aspirate enough tissue cells, and repeated lifting and insertion are required, which increases the risk of bleeding, and too many red blood cells will block the tissue cells and affect the pathological diagnosis. Therefore, the above operation needs to be repeated many times. Such repeated puncture process not only increases the difficulty for the operator, but also easily causes complications such as pain, bleeding or hematoma, which brings a lot of pain to the patient. Studies have shown that the rotational needle insertion method can effectively improve the diagnostic accuracy of thyroid micronodules and does not cause complications in patients. However, the rotational needle insertion method is more difficult to operate. Utility Model Content
[0003] The utility model aims to provide a cell puncture needle with automatic rotation and aspiration to solve the defects of the prior art, so as to facilitate the realization of rotation and needle insertion and aspiration of tissue cells.
[0004] In order to solve the above technical problems, the utility model provides a cell puncture needle with automatic rotation and suction, comprising a tube body, wherein the tube body comprises a rotating tube body and a fixed tube body;
[0005] A piston is arranged in the rotating tube body, the piston is sealed and connected to the inner wall of the rotating tube body, the piston can drive the rotating tube body to rotate around the axis and can slide along the axial direction of the rotating tube body, an anti-rotation structure is arranged on the outer wall of the rotating tube body, and a puncture needle is arranged at one end of the rotating tube body;
[0006] The locking rod is hinged on the locking cam and the locking cam is hinged on the locking cam, ...
[0007] The puncture needle, the rotating tube body, the fixed tube body, the piston and the tension-torsion elastic member are coaxially arranged.
[0008] The utility model provides a first clamp and a limiting structure, so that when the rotating tube body and the fixed tube body rotate relative to each other so that the tension-torsion elastic member stores torsional potential energy, the piston can be prevented from pushing the pushing body under the pulling force of the tension-torsion elastic member; and a second clamp and an anti-rotation structure are provided, so that after the torsional potential energy of the tension-torsion elastic member is stored, the rotating tube body and the fixed tube body can be relatively fixed to prevent the rotating tube body and the fixed tube body from rotating relative to each other.
[0009] The utility model can realize the extraction of tissue cells by negative pressure while rotating the needle. First, the piston is pushed in the direction of the puncture needle by pushing the push body, and the first clamp is clamped on the limiting structure. The tension-twist elastic member will be straightened with the movement of the piston, and the first clamp can prevent the push body and the piston from retreating under the elastic force of the tension-twist elastic member. At this time, the rotating tube body with the needle can be fixed, and the fixed tube body can be rotated to twist the tension-twist elastic member. The tension-twist elastic member rotates to store rotational elastic potential energy, and because the tension-twist elastic member is in a straightened state, the tension-twist elastic member will shorten during the rotation process, which is equivalent to being stretched, thereby storing the axis. The push body and the locking rod will rotate together during the rotation of the fixed tube body. After the fixed tube body completes its rotation, the push body continues to be pushed to connect the second clamping piece with the anti-rotation structure. The second clamping piece can clamp the rotating tube body to prevent the rotating tube body and the fixed tube body from rotating relative to each other. At this time, the preparation work of the cell puncture needle for automatic rotary aspiration is completed; when the locking rod is toggled to separate the second clamping piece from the anti-rotation structure, the piston will rotate under the action of the tension-torsion elastic piece and move in the direction of the fixed tube body, thereby driving the rotation of the rotating tube body and the puncture needle, realizing the extraction of tissue cells by negative pressure while rotating the needle into the needle.
[0010] Furthermore, the rotating tube body comprises a circular section and an elliptical section, the cross section of the piston is elliptical, the piston is arranged in the elliptical section of the rotating tube body, and the circular section of the rotating tube body is rotatably connected to the fixed tube body.
[0011] The utility model realizes that the piston drives the rotating tube body to rotate by setting the cross section of the piston to be elliptical.
[0012] Furthermore, the anti-rotation structure includes a step arranged on the rotating tube body, the step is arranged on the circular segment of the rotating tube body, the second clamp is buckled on the outside of the step, an anti-slip layer is arranged between the second clamp and the step, and the anti-slip layer is used to limit the rotation of the rotating tube body.
[0013] The utility model realizes limiting the rotation of the rotating tube body while preventing the movement of the locking rod by arranging the step and the second clamping piece is buckled on the outside of the step.
[0014] Furthermore, a hook is provided at one end of the rotating tube body close to the fixed tube body, and the end of the fixed tube body is clamped between the inner side of the step and the hook.
[0015] The utility model uses the hook and the step to ensure that the rotating tube body and the fixed tube body can only rotate relative to each other but cannot move axially.
[0016] Furthermore, the limiting structure is Y-shaped, the locking rod is placed on the limiting structure, and the first clamping member can be limited by the limiting structure to a side close to the rotating tube body.
[0017] The utility model realizes the limiting of the locking rod by arranging the Y-shaped limiting structure.
[0018] Furthermore, the tension-torsion elastic member includes a rubber band or a spring.
[0019] The pulling and twisting elastic member of the utility model adopts a rubber band or a spring, which can realize the simultaneous action of pulling force and twisting force, so that the puncture needle can suck tissue cells while rotating.
[0020] Furthermore, one end of the tension-torsion elastic member is connected to the piston, and the other end of the tension-torsion elastic member is connected to a rotating block, and the rotating block is rotatably connected to the fixed tube body. A fixing groove is provided on the rotating block, and a pressure relief rod is rotatably arranged at one end of the fixed tube body away from the rotating tube body, and one end of the pressure relief rod is clamped with the fixing groove. By rotating the pressure relief rod, one end of the pressure relief rod can be separated from the fixing groove, so that the rotating block rotates to release the torque of the tension-torsion elastic member.
[0021] The utility model provides a pressure relief rod, when the puncture needle does not need to rotate or negative pressure is not needed, one end of the pressure relief rod can be separated from the fixed groove, and the rotating block can rotate by itself to release the torsion force and most of the tension of the tension-twist elastic member.
[0022] Furthermore, the push body includes a ring plate and a push rod, the ring plate is arranged at one end of the push rod, the ring plate is in contact with the piston and is coaxially arranged with the piston, and the other end of the push rod extends out of the fixed tube body and is hinged to the locking rod.
[0023] The utility model provides a ring plate so that the push rod can push the piston more stably, and the push rod is hinged with the locking rod so that the locking rod can be tilted, thereby realizing the separation of the second clamping member from the step and the first clamping member crossing the limiting structure.
[0024] Furthermore, three or more push rods are provided, and one end of the plurality of push rods extending out of the fixed tube body is connected by a second connecting rod.
[0025] The utility model provides three push rods, which are connected by a second connecting rod to form a whole, so that the push body structure is more stable.
[0026] Furthermore, a third connecting rod is arranged on the pushing body, a rotating seat is arranged at one end of the third connecting rod away from the pushing body, and one end of the locking rod is hinged to the rotating seat via a rotating shaft.
[0027] The beneficial effects of the utility model are as follows: the utility model can be used to realize the extraction of tissue cells by negative pressure while rotating the needle, firstly, the piston is pushed in the direction of the puncture needle by pushing the push body, and the first clamping piece is clamped on the limiting structure, the tension-twist elastic piece will be straightened with the movement of the piston, and the first clamping piece can prevent the push body and the piston from retreating under the elastic force of the tension-twist elastic piece, at this time the rotating tube body with the needle can be fixed, the fixed tube body is rotated, so that the tension-twist elastic piece is twisted, and the tension-twist elastic piece rotates to store rotational elastic potential energy, and because the tension-twist elastic piece is in a straightened state, the tension-twist elastic piece will shorten during the rotation process, which is equivalent to being stretched , thereby storing axial elastic potential energy. During the rotation of the fixed tube body, the pushing body and the locking rod will rotate together. After the rotation of the fixed tube body is completed, the pushing body continues to be pushed to connect the second clamping piece with the anti-rotation structure. The second clamping piece can clamp the rotating tube body to prevent the rotating tube body and the fixed tube body from rotating relative to each other. At this time, the preparation work of the cell puncture needle for automatic rotary suction is completed; when the locking rod is toggled to separate the second clamping piece from the anti-rotation structure, the piston will rotate under the action of the tension-torsion elastic piece and move in the direction of the fixed tube body, thereby driving the rotation of the rotating tube body and the puncture needle, realizing the extraction of tissue cells by negative pressure while rotating the needle into the needle. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a schematic diagram of the structure of the utility model when it is ready;
[0029] Figure 2 This is a schematic diagram of the structure of the utility model when applying torque to the tension-torsion elastic member;
[0030] Figure 3 It is a schematic diagram of the structure of the utility model in the initial state;
[0031] Figure 4 for Figure 1 Enlarged view of point A in the middle;
[0032] Figure 5 for Figure 1 Enlarged view of point C in the middle;
[0033] Figure 6 This is a schematic diagram of the connection structure between the push body and the locking rod of the utility model;
[0034] Figure 7 It is a right view of the connection structure between the push body and the locking rod of the utility model;
[0035] Figure 8 It is a structural schematic diagram of the puncture needle of the utility model.
[0036] Figure numerals: rotating tube body 1; fixed tube body 2; puncture needle 3; piston 4; first connecting rod 5; push body 6; ring plate 7; push rod 8; tension and torsion elastic member 9; second connecting rod 10; third connecting rod 11; rotating seat 12; rotating shaft 13; hook 14; fixing groove 15; pressure relief rod 16; step 17; limiting structure 18; first clamping member 19; second clamping member 20; rotating block 21; locking rod 22. DETAILED DESCRIPTION
[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0038] like Figure 1 As shown, this embodiment provides a cell puncture needle with automatic rotation and suction, including a tube body, the tube body including a rotating tube body 1 and a fixed tube body 2, the left end of the rotating tube body 1 is connected to the puncture needle 3, the right end inner wall of the rotating tube body 1 is rotatably connected to the left end outer wall of the fixed tube body 2, as shown in FIG. Figure 4 As shown, a step 17 is provided near the right end of the rotating tube body 1, the left end of the fixed tube body 2 is against the inner side of the step 17, and a hook 14 is provided at the right end of the rotating tube body 1. The hook 14 and the inner side of the step 17 can limit the axial movement of the fixed tube body 2.
[0039] like Figure 1 As shown, a piston 4 is arranged in the rotating tube body 1, and the piston 4 is sealed and connected to the inner wall of the rotating tube body 1. The piston 4 can drive the rotating tube body 1 to rotate around the axis and can slide axially along the rotating tube body 1. In this embodiment, the rotating tube body 1 includes a circular segment and an elliptical segment. The cross-section of the piston 4 is elliptical. The piston 4 is arranged in the elliptical segment of the rotating tube body 1. The circular segment of the rotating tube body 1 is rotatably connected to the fixed tube body 2, so that the piston 4 can drive the rotating tube body 1 to rotate around the axis and can slide axially along the rotating tube body 1.
[0040] like Figure 1 As shown, a push body 6 is arranged in the fixed tube body 2, one end of the push body 6 abuts against the right side of the piston 4, and the other end of the push body 6 extends out of the fixed tube body 2 and is connected to a locking rod 22, as shown in FIG. Figure 6 As shown, the push body 6 includes a ring plate 7 and a push rod 8. The ring plate 7 is arranged at the left end of the push rod 8, the ring plate 7 is against the piston 4, and the right end of the push rod 8 extends out of the fixed tube body 2, as shown in FIG. Figure 7As shown, in this embodiment, three push rods 8 are provided, and the right ends of the three push rods 8 are connected by three second connecting rods to form a stable triangular overall structure. By pressing the triangular structure, the piston 4 can be pushed through the ring plate 7. One end of the locking rod 22 is hinged to one of the push rods 8 through the third connecting rod 11, and two rotating seats 12 are provided on the third connecting rod 11. One end of the locking rod 22 is arranged between the two rotating seats 12 and is rotatably connected to the two rotating seats 12 through the rotating shaft 13. The other end of the locking rod 22 is provided with a second clamping member 20, and the first clamping member 19 is provided near the middle of the locking rod 22. In this embodiment, the second clamping member 20 is in the shape of a rod, which is perpendicular to the locking rod 22, and the first clamping member 19 is in the shape of a circle, which is coaxially arranged with the locking rod 22.
[0041] like Figure 1 As shown, a limiting structure 18 is provided on the outer wall of the fixed tube body 2, and the first clamp 19 can be clamped on the left side of the limiting structure 18 to prevent the locking rod 22 from moving to the right. The second clamp 20 can be pressed on the outer side of the step 17, and an anti-skid layer is provided between the second clamp 20 and the step 17, which can prevent the locking rod 22 from moving to the right and prevent the fixed tube body 2 and the rotating tube body 1 from rotating. The spacing between the anti-rotation structure and the limiting structure 18 is greater than the spacing between the first clamp 19 and the second clamp 20, so that the first clamp 19 and the second clamp 20 cannot cooperate with the limiting structure 18 and the anti-rotation structure respectively at the same time. The anti-skid layer can use concave and convex stripes to increase friction.
[0042] like Figure 1 As shown, a tension-torsion elastic member 9 is arranged in the fixed tube body 2. The tension-torsion elastic member 9 needs to transmit tension and torque to realize rotational suction. In this embodiment, the tension-torsion elastic member 9 adopts a rubber band. One end of the tension-torsion elastic member 9 is fixedly connected to the rotating block 21, and the other end of the tension-torsion elastic member 9 is fixedly connected to the piston through the first connecting rod 5. The rotating block 21 is rotationally connected to the right end of the fixed tube body 2.
[0043] like Figure 5 As shown, a fixing groove 15 is provided on the outer side of the rotating block 21, and a pressure relief rod 16 is rotatably provided on the right end of the fixed tube body 2. One end of the pressure relief rod 16 is engaged with the fixing groove 15 to prevent the rotating block 21 from rotating. By rotating the pressure relief rod 16, one end of the pressure relief rod 16 can be separated from the fixing groove 15, so that the rotating block 21 rotates, thereby releasing the torsion and most of the tension of the tension-torsion elastic member 9.
[0044] like Figure 8 As shown, the puncture needle 3 scrapes cells by the blade near the tip.
[0045] In this embodiment, the puncture needle 3, the rotating tube body 1, the fixed tube body 2, the piston 4, and the tension-torsion elastic member 9 are coaxially arranged, and the rotating tube body 1, the fixed tube body 2, the push body 6, the locking rod 22, the pressure relief rod 16, and the rotating block 21 can all be made of hard plastic material.
[0046] The method of using the automatic rotating suction cell puncture needle is as follows: Figure 3 As shown in FIG. 1 , the initial state of the device is shown. First, the locking rod 22 is lifted to prevent the first clamping member 19 from being stuck on the right side of the limiting structure 18, and the push body 6 is pushed. The tension-torsion elastic member 9 will be straightened, so that the ring plate 7 is against the piston 4. Figure 2 As shown, the locking rod 22 is pressed down again to clamp the first clamping member 19 on the left side of the limiting structure 18 to prevent the tension-torsion elastic member 9 from pulling the push body 6 back to the right through the piston 4. Since the spacing between the anti-rotation structure and the limiting structure 18 is greater than the spacing between the first clamping member 19 and the second clamping member 20, the second clamping member 20 is not pressed on the step 17 at this time, and the fixed tube body 2 and the rotating tube body 1 can rotate relative to each other. At this time, one hand can fix the rotating tube body 1, and the other hand can use the pressure relief rod 16 to rotate the fixed tube body 2. The pressure relief rod 16 drives the fixed tube body 2 to rotate. Since the pressure relief rod 16 is stuck in the fixed groove 15 of the rotating block 21, the fixed tube body 2 will drive the rotating block 21 to rotate together , so that the rotating block 21 drives the tension-torsion elastic member 9 to rotate and store the rotational elastic potential energy. Since the cross section of the piston 4 is elliptical and fits the elliptical tube body of the rotating tube, the tension-torsion elastic member 9 will not drive the piston 4 to rotate, and since the tension-torsion elastic member 9 is in a straightened state, the tension-torsion elastic member 9 will shorten during the rotation process, which is equivalent to being stretched, thereby storing axial elastic potential energy. After the tension-torsion elastic member 9 rotates to a certain extent, it pushes the push body 6 again, pushing the locking rod 22 forward, so that the second clamping member 20 is clamped on the step 17, thereby limiting the mutual rotation of the fixed tube body 2 and the rotating tube body 1 and the movement of the piston 4. At this time, it is ready, as shown in FIG. Figure 1 shown.
[0047] Next, hold the fixed tube body 2 and insert the puncture needle 3 into the target tissue, lift the locking rod 22, and release the lock between the fixed tube body 2 and the rotating tube body 1. Under the action of the tension-torsion elastic member 9, the tension-torsion elastic member 9 will pull the piston 4 and the push body 6 to move to the right to aspirate the tissue cells. At the same time, the tension-torsion elastic member 9 will rotate the piston 4, and the piston 4 will drive the rotating tube body 1 and the puncture needle 3 to rotate along the axis, so that the puncture needle 3 can scrape off more tissue cells. At this time, hold the fixed tube body 2 and continue to insert the needle to achieve rotational insertion and simultaneous rotational extraction of cell tissue.
[0048] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.
Claims
1. A cell puncture needle with automatic rotation and suction, characterized in that: It includes a pipe body, which includes a rotating pipe body (1) and a fixed pipe body (2); A piston (4) is arranged inside the rotating tube body (1), and the piston (4) is sealedly connected to the inner wall of the rotating tube body (1). The piston (4) can drive the rotating tube body (1) to rotate around the axis and can slide along the axial direction of the rotating tube body (1). An anti-rotation structure is arranged on the outer wall of the rotating tube body (1), and a puncture needle (3) is arranged at one end of the rotating tube body (1); One end of the fixed tube body (2) is rotatably connected to the other end of the rotating tube body (1); a limiting structure (18) is arranged on the outer wall of the fixed tube body (2); a push body (6) and a tension-torsion elastic member (9) are arranged in the tube body; one end of the push body (6) abuts against the piston (4); the other end of the push body (6) extends out of the fixed tube body (2) and is hingedly connected to a locking rod (22); a first clamping member (19) and a second clamping member (20) are arranged on the locking rod (22); the second clamping member (20) cooperates with the anti-rotation structure to limit the rotation of the rotating tube body (1) and limit the movement of the locking rod (22); the first clamping member (19) and the second clamping member (20) are arranged on the locking rod (22); The limiting structure (18) is used to limit the movement of the locking rod (22); the distance between the anti-rotation structure and the limiting structure (18) is greater than the distance between the first clamp (19) and the second clamp (20), so that the first clamp (19) and the second clamp (20) cannot be respectively matched with the limiting structure (18) and the anti-rotation structure at the same time; one end of the tension-torsion elastic member (9) is connected to the piston (4), and the other end of the tension-torsion elastic member is connected to the fixed tube body (2); the tension-torsion elastic member (9) can transmit tension and torque; when the first clamp (19) is matched with the limiting structure (18), the tension-torsion elastic member (9) is in a straightened state; The puncture needle (3), the rotating tube body (1), the fixed tube body (2), the piston (4), and the tension-torsion elastic member (9) are coaxially arranged.
2. The cell puncture needle with automatic rotation and aspiration according to claim 1, characterized in that: The rotating tube body (1) comprises a circular section and an elliptical section, the cross section of the piston (4) is elliptical, the piston (4) is arranged on the elliptical section of the rotating tube body (1), and the circular section of the rotating tube body (1) is rotatably connected to the fixed tube body (2).
3. The cell puncture needle with automatic rotation and aspiration according to claim 2, characterized in that: The anti-rotation structure comprises a step (17) arranged on the rotating tube (1), the step (17) being arranged on a circular segment of the rotating tube (1), the second clamping member (20) being buckled on the outside of the step (17), an anti-slip layer being arranged between the second clamping member (20) and the step (17), the anti-slip layer being used to limit the rotation of the rotating tube (1).
4. The cell puncture needle with automatic rotation and aspiration according to claim 3, characterized in that: A hook (14) is provided at one end of the rotating tube body (1) close to the fixed tube body (2), and the end of the fixed tube body (2) is clamped between the inner side of the step (17) and the hook (14).
5. The cell puncture needle with automatic rotation and aspiration according to claim 1, characterized in that: The limiting structure (18) is Y-shaped, the locking rod (22) is placed on the limiting structure (18), and the first clamping member (19) can be limited by the limiting structure (18) to a side close to the rotating tube body (1).
6. The cell puncture needle with automatic rotation and aspiration according to any one of claims 1 to 5, characterized in that: The tension-torsion elastic member (9) comprises a rubber band or a spring.
7. The cell puncture needle with automatic rotation and aspiration according to claim 6, characterized in that: One end of the tension-torsion elastic member (9) is connected to the piston (4), and the other end of the tension-torsion elastic member (9) is connected to a rotating block (21). The rotating block (21) is rotationally connected to the fixed tube body (2). A fixing groove (15) is provided on the rotating block (21). A pressure relief rod (16) is rotationally arranged at one end of the fixed tube body (2) away from the rotating tube body (1). One end of the pressure relief rod (16) is clamped with the fixing groove (15). By rotating the pressure relief rod (16), one end of the pressure relief rod (16) can be separated from the fixing groove (15), so that the rotating block (21) rotates and releases the torque of the tension-torsion elastic member (9).
8. The cell puncture needle with automatic rotation and aspiration according to any one of claims 1 to 5, characterized in that: The push body (6) comprises a ring plate (7) and a push rod (8), wherein the ring plate (7) is arranged at one end of the push rod (8), the ring plate (7) is in contact with the piston (4) and is coaxially arranged with the piston (4), and the other end of the push rod (8) extends out of the fixed tube body (2) and is hinged with the locking rod (22).
9. The cell puncture needle with automatic rotation and aspiration according to claim 8, characterized in that: Three or more push rods (8) are provided, and one end of the plurality of push rods (8) extending out of the fixed tube body (2) is connected via a second connecting rod (10).
10. The cell puncture needle with automatic rotation and aspiration according to claim 8, characterized in that: A third connecting rod (11) is arranged on the push body (6), a rotating seat (12) is arranged at one end of the third connecting rod (11) away from the push body (6), and one end of the locking rod (22) is hinged to the two rotating seats (12) via a rotating shaft (13).