Thyroid fine needle puncture suction biopsy needle

Abstract

A thyroid fine needle puncture suction biopsy needle comprises a needle tube and a pressure control component. The pressure control component comprises a main body structure, a connecting part and a valve assembly, a pressure control cavity is formed in the main body structure, and the pressure control cavity can communicate with the interior of the needle tube through the connecting part; a vent hole communicated with the outside is formed in the main body structure, the valve assembly is located between the vent hole and the pressure control cavity, the valve assembly is connected with an operating hand button, and the operating hand button is used for controlling the valve assembly to be switched between an open state and a closed state; in the closed state, the valve assembly separates the pressure control cavity from the vent hole, and in the open state, the valve assembly is opened, so that the needle tube is communicated with the outside atmosphere through the pressure control cavity and the vent hole. According to the utility model, large negative pressure cannot be generated, so that a large amount of blood is prevented from being sucked, the proportion of the obtained nodule cell quantity is high, the pathological diagnosis rate is higher, the cell quantity of single puncture is increased, the risk of tumor needle passage metastasis is reduced, and the utility model belongs to the technical field of medical instruments.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a thyroid fine needle aspiration biopsy needle. Background Art

[0002] Thyroid nodules are the most common thyroid disease, with an incidence rate of 20% to 75%, of which malignant nodules account for about 10%. Therefore, there is a great demand for differentiating benign and malignant thyroid nodules. Fine-needle aspiration cytology (FNA) uses a fine needle (the outer diameter of the needle is 0.6-0.9mm) to repeatedly aspirate cells from suspicious lesions, prepare slides, stain them, and then observe them under a microscope to obtain a pathological diagnosis. This technology is practical, fast, economical, and minimally invasive, and has become the main examination method for diagnosing benign and malignant thyroid nodules. Existing thyroid puncture and aspiration biopsy needles generally use a fine needle with a single bevel tip to puncture the target nodule. The needle is then inserted and withdrawn back and forth, repeatedly puncturing the nodule to extract tissue cells within the nodule. Some fine needles are also used with piston devices such as syringes to create negative pressure puncture.

[0003] Due to the differences in the internal composition of thyroid nodules, such as calcification and fibro-glial deposition, the amount of cells obtained from some nodules using the existing thyroid single-bevel needle tip puncture needle is very small, making pathological diagnosis difficult. At the same time, every time the needle is withdrawn during the puncture process, because the needle pressure is not fixed, many cells fall off into the thyroid gland, and may even fall off into other tissues on the needle track, causing the risk of needle track metastasis. Although this can be combined with piston equipment such as syringes to form negative pressure puncture, most of the blood sucked out by the negative pressure is blood rather than tumor cells of the nodule, which not only leads to the puncture doctor's misjudgment of the number of punctured cells, but also the large amount of red blood cells aspirated are superimposed on the smear, which will affect the pathological observation under the microscope, and ultimately the pathological diagnosis is still not obvious, which brings great trouble to clinicians and patients. Utility Model Content

[0004] In view of the technical problems existing in the prior art, the purpose of the present invention is to provide a thyroid fine needle aspiration biopsy needle that can obtain tissue with a higher proportion of nodule cells and is not easy to fall off.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a thyroid fine needle aspiration biopsy needle, comprising a needle tube and a pressure control component; the pressure control component comprises a main structure, a connecting part and a valve assembly, a pressure control chamber is formed in the main structure, the connecting part is used to connect the needle tube, and the pressure control chamber can be connected to the interior of the needle tube through the connecting part; the main structure is provided with a vent hole connected to the outside world, the valve assembly is located between the vent hole and the pressure control chamber, the valve assembly is connected to an operating button, and the operating button is used to control the valve assembly to switch between an open state and a closed state; in the closed state, the valve assembly separates the pressure control chamber from the vent hole, and in the open state, the valve assembly is opened so that the needle tube is connected to the outside atmosphere through the pressure control chamber and the vent hole.

[0006] After adopting this structure, the valve assembly opens when the needle is inserted, and the pressure in the needle tube is communicated with the outside world through the vent, so that tissue cells can enter the needle tube smoothly without generating a large negative pressure, thereby avoiding the inhalation of a large amount of blood. In this way, the amount of nodule cells obtained is high and the pathological diagnosis rate is higher; when the needle is withdrawn, the valve assembly closes, and the pressure in the needle tube is relatively fixed. When the needle is pulled out, the cells in the needle tube are not easy to fall off into the nodule or the needle tract, which not only increases the amount of cells in a single puncture, but also reduces the risk of tumor needle tract metastasis.

[0007] As a preference, one end of the needle tube is a needle tip, and the needle tip is serrated.

[0008] As a preference, the other end of the needle tube is provided with a spiral connection port, and the connection portion is a first spiral connector that matches the spiral connection port.

[0009] As a preference, the spiral connection port is in the shape of a hollow truncated cone, the inner wall of the spiral connection port is provided with a thread, and the spiral connection port is mated with the first spiral connection head through the thread.

[0010] As a preference, it further includes a needle core that can be inserted into the needle tube, one end of the needle core is a conical needle tip for puncture, and the other end of the needle core is provided with a second spiral connector, which matches the spiral connector.

[0011] As a preference, the main structure is in the shape of a hollow square tube, the connecting portion is fixedly arranged at one end of the main structure, and the vent hole is arranged at the other end of the main structure.

[0012] As a preferred embodiment, the valve assembly includes a valve bonding platform and two valve leaves, the valve bonding platform is fixedly arranged in the main structure, and gas channels are respectively left between the two sides of the valve bonding platform and the inner wall of the main structure; the valve leaves are sealingly and slidably connected to the inner wall of the main structure, the two valve leaves form an eight-shape and the inner sides face the two gas channels respectively, the operating button is connected to the valve leaves and drives the valve leaves to slide, and the valve leaves block or open the gas channels when sliding, thereby switching the valve assembly between an open state and a closed state.

[0013] As a preference, the operating button is slidably connected to the outer wall of the main structure, the main structure is provided with a sliding hole, the valve leaf can slidably pass through the sliding hole and be fixedly connected to the operating button.

[0014] As a preference, a slide rail is fixedly provided on the outer wall of the main structure, and the operating button is slidably connected to the outer wall of the main structure through the slide rail.

[0015] As a preference, the needle tube consists of a needle tube body and a cell storage chamber, the needle tip is located at one end of the needle tube body, and the cell storage chamber is fixedly connected to the other end of the needle tube body.

[0016] In general, the utility model has the following advantages:

[0017] (1) A valve-type pressure control component is used. When the needle is inserted, the valve leaf opens, allowing the pressure in the needle tube to communicate with the outside world through the vent. When the needle is removed, the valve leaf opens and closes, so that the inside of the needle tube is not connected to the outside atmosphere. This not only avoids the inhalation of a large amount of blood during negative pressure suction, but also increases the proportion of nodule cells obtained and the pathological diagnosis rate. In addition, when the needle is removed, the cells in the needle tube are not easily shed into the nodule or on the needle tract, which increases the amount of cells in a single puncture and reduces the risk of tumor needle tract metastasis.

[0018] (2) The distal end of the needle tube adopts a serrated needle tip, which can not only obtain tissue cells more efficiently, but also the needle tube can be rotated during the puncture process. The serrated needle tip will have a better cutting effect and further increase the cell puncture amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the needle tube and the pressure control component in Example 1 when the valve assembly is open.

[0020] Figure 2 Schematic diagram of the structure of the needle tube and pressure control component in Example 1 when the valve assembly is closed.

[0021] Figure 3This is a connection diagram of the needle tube and pressure control components.

[0022] Figure 4 Schematic diagram of the needle core structure.

[0023] Figure 5 This is a schematic structural diagram of the needle tube and pressure control component in Example 2.

[0024] Among them, 1 is the needle tip, 2 is the needle tube body, 3 is the cell storage compartment, 4 is the spiral connection port, 5 is the first spiral connector, 6 is the main structure, 7 is the operating button, 8 is the valve leaf, 9 is the valve bonding platform, 10 is the slide rail, 11 is the vent, 12 is the needle core, and 13 is the second spiral connector. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] Example 1

[0027] like Figures 1 to 4 As shown, a thyroid fine needle aspiration biopsy needle includes a needle tube and a pressure control component; the pressure control component includes a main structure, a connecting part and a valve assembly, a pressure control chamber is formed in the main structure, the connecting part is used to connect the needle tube, and the pressure control chamber can be connected to the interior of the needle tube through the connecting part; the main structure is provided with a vent hole connected to the outside world, the valve assembly is located between the vent hole and the pressure control chamber, the valve assembly is connected to an operating button, the operating button is used to control the valve assembly to switch between an open state and a closed state; in the closed state, the valve assembly separates the pressure control chamber from the vent hole, and in the open state, the valve assembly is opened so that the needle tube is connected to the outside atmosphere through the pressure control chamber and the vent hole.

[0028] One end of the needle tube is a needle tip with a serrated shape. The needle tip is annular and serrated, so that the needle tube can be rotated during the needle insertion process. The serrated needle tip has a better cutting effect, further increasing the cell puncture volume and more efficiently obtaining tissue cells.

[0029] The other end of the needle tube is provided with a spiral connection port, and the connection part is a first spiral connection head that matches the spiral connection port. The needle tube and the pressure control component can be quickly connected by screwing the first spiral connection head into the rotary connection port.

[0030] The spiral connection port is in the shape of a hollow truncated cone, and the inner wall of the spiral connection port is provided with a thread, and the spiral connection port is connected to the first spiral connection head through the thread. The use of a truncated cone structure with a larger opening allows the spiral connection head to be more conveniently connected to the spiral connection port.

[0031] The thyroid fine needle aspiration biopsy needle also includes a core needle capable of being inserted into the needle tube. One end of the core needle has a tapered needle tip for puncture, and the other end of the core needle has a second spiral connector that mates with the spiral connector. When the core needle is inserted into the needle tube, the tapered needle tip extends from one end of the needle tube, and the second spiral connector mates with the spiral connector of the needle tube.

[0032] The main structure is in the shape of a hollow square tube, the connecting portion is fixedly arranged at one end of the main structure, and the vent hole is arranged at the other end of the main structure.

[0033] The valve assembly includes a valve bonding platform and two valve leaves. The valve bonding platform is fixedly arranged in the main structure, and gas channels are respectively left between the two sides of the valve bonding platform and the inner wall of the main structure; the valve leaves are sealingly and slidingly connected to the inner wall of the main structure, and the two valve leaves form an eight-shaped shape with the inner sides facing the two gas channels respectively. The operating button connects the valve leaves and drives the valve leaves to slide. When the valve leaves slide, they block or open the gas channel, thereby switching the valve assembly between the open state and the closed state.

[0034] The pressure control chamber is close to one end of the connecting portion. When the valve assembly is open, the pressure control chamber is connected to the vent hole at the other end. When the valve assembly is closed, the pressure control chamber is not connected. The valve bonding platform is block-shaped and its surface can be made of rubber. When the valve leaf abuts against the valve bonding platform, a seal is formed.

[0035] The operating knob is slidably connected to the outer wall of the main structure. The main structure is provided with a sliding hole, through which the valve leaf can slide and be fixedly connected to the operating knob. When the valve assembly is in the closed state, the valve leaf abuts against the end of the sliding hole near the connection portion and the valve bonding platform, and the edge of the valve leaf is sealed against the inner wall of the main structure, so that the pressure control chamber is sealed away from the end of the connection portion. The valve leaf can also be connected to the external operating knob by a rod. The rod can be an L-shaped rod that extends a distance toward the other end of the main structure and then bends and passes through the sliding hole. In this way, the sliding hole can be set near the other end of the main structure to prevent air leakage from the pressure control chamber through the sliding hole.

[0036] The outer wall of the main structure is fixed with a slide rail, and the operating button is slidably connected to the outer wall of the main structure through the slide rail. The setting of the slide rail can make the sliding operation more stable and smooth.

[0037] The needle tube consists of a needle tube body and a cell storage chamber. The needle tip is located at one end of the needle tube body, and the cell storage chamber is fixedly connected to the other end of the needle tube body.

[0038] The procedure for using the thyroid fine needle aspiration biopsy needle is as follows:

[0039] Step 1: First, insert the needle core into the needle tube to form a puncture cannula needle. This can not only expel the air in the needle tube and prevent the needle tube from sucking in other normal tissues during puncture, but also make the puncture needle sharper and the puncture process smoother; then, under ultrasound guidance, puncture the puncture cannula needle (needle core + needle tube) into the nodule, remove the needle core, and screw the needle tube to the pressure control component to fix it.

[0040] Step 2: Hold the main structure of the pressure control component and press the operating button. When puncturing the nodule, the needle tip at the distal end of the needle tube will cut the tissue cells at the same time. Move the operating button along the slide rail away from the needle tip to drive the valve leaflet to open. Figure 1 As shown, the interior of the needle tube is connected to the outside world through the vent hole, and the cut tissue cells enter the needle tube smoothly. At the same time, the needle tube is rotated and the serrated needle head is used to cut more tissue cells.

[0041] Step 3: Continue to hold down the operating button and move the flap operating button along the slide rail toward the needle tip to drive the flap leaf and the flap bonding platform to close. Figure 2 As shown, at this time, the internal pressure of the needle tube is not connected to the external air pressure, the internal pressure of the needle tube is fixed, and the needle tube is pulled out from the middle part of the nodule. When the needle tube is pulled out, the tissue cells cut in the needle tube will not easily fall off into the nodule and other normal tissues on the needle track.

[0042] Step 4: Repeat the above operations of inserting the needle in step 2 and removing the needle in step 3 until enough tissue cells are visible in the cell storage compartment. Finally, completely remove the needle from the human body, disconnect the needle from the pressure control component, discharge the tissue cells in the cell storage compartment and the needle, and send them to the pathology department for examination after formaldehyde fixation.

[0043] Example 2

[0044] like Figure 5 As shown, the flap assembly includes a flap bonding platform and two flap leaves. The flap bonding platform is fixed within the main structure, with air passages formed between the two sides of the flap bonding platform and the inner wall of the main structure. The flap leaves are rotatably connected to the main structure via a connecting rod. The connecting rod passes through the main structure and is rotatably and sealedly connected to the side wall of the main structure. An operating knob is located outside the main structure and connected to the connecting rod. The operating knob rotates the connecting rod, thereby causing the flap leaves to oscillate.

[0045] The two valve leaves form an eight-shaped pattern with their inner sides facing the two gas passages. When the valve leaves swing, they block or open the gas passages, thereby switching the valve assembly between an open state and a closed state. The operating knob is connected to the end of the connecting rod away from the valve leaves and is located outside the main structure.

[0046] The procedure for using the thyroid fine needle aspiration biopsy needle is as follows:

[0047] Step 1: First, insert the needle core into the needle tube to form a puncture cannula needle. This can not only expel the air in the needle tube and prevent the needle tube from sucking in other normal tissues during puncture, but also make the puncture needle sharper and the puncture process smoother; then, under ultrasound guidance, puncture the puncture cannula needle (needle core + needle tube) into the nodule, remove the needle core, and screw the needle tube to the pressure control component to fix it.

[0048] Step 2: Hold the main structure of the pressure control component, press the operating button, and when puncturing the inside of the nodule, the needle tip at the distal end of the needle tube will cut the tissue cells at the same time. Pull the operating button toward the needle tip. Figure 5 As shown by the middle dotted line, the valve leaflet is driven to open, and the interior of the needle tube is connected to the outside world through the vent hole. The cut tissue cells enter the needle tube smoothly, and the needle tube is rotated at the same time, and more tissue cells are cut using the serrated needle.

[0049] Step 3: Continue to hold down the operating button and pull it away from the needle tip. Figure 5 As shown by the solid line in the middle, the valve leaflets and the valve adhesive platform are closed. At this time, the inside of the needle tube is not connected to the external air pressure, and the pressure inside the needle tube is fixed. The needle tube is pulled out from the middle part of the nodule. When the needle tube is pulled out, the tissue cells cut in the needle tube will not easily fall off into other normal tissues in the nodule and on the needle track.

[0050] Step 4: Repeat the above operations of inserting the needle in step 2 and removing the needle in step 3 until enough tissue cells are visible in the cell storage compartment. Finally, completely remove the needle from the human body, disconnect the needle from the pressure control component, discharge the tissue cells in the cell storage compartment and the needle, and send them to the pathology department for examination after formaldehyde fixation.

[0051] The above embodiments are preferred implementation methods of the utility model, but the implementation methods of the utility model are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the utility model should be considered equivalent replacement methods and are included in the scope of protection of the utility model.

Claims

1. A thyroid fine needle aspiration biopsy needle, characterized in that: Including needle tube and pressure control components; The pressure control component comprises a main structure, a connecting portion and a valve assembly, wherein a pressure control chamber is formed in the main structure, the connecting portion is used to connect the needle tube, and the pressure control chamber can communicate with the interior of the needle tube through the connecting portion; The main structure is provided with a vent hole connected to the outside world, the valve assembly is located between the vent hole and the pressure control chamber, the valve assembly is connected to an operating button, and the operating button is used to control the valve assembly to switch between an open state and a closed state; in the closed state, the valve assembly separates the pressure control chamber from the vent hole, and in the open state, the valve assembly is opened so that the needle tube is connected to the outside atmosphere through the pressure control chamber and the vent hole.

2. A thyroid fine needle aspiration biopsy needle according to claim 1, characterized in that: One end of the needle tube is a needle tip, and the needle tip is serrated.

3. A thyroid fine needle aspiration biopsy needle according to claim 2, characterized in that: The other end of the needle tube is provided with a spiral connection port, and the connection part is a first spiral connection head matching the spiral connection port.

4. A thyroid fine needle aspiration biopsy needle according to claim 3, characterized in that: The spiral connection port is in the shape of a hollow truncated cone, and the inner wall of the spiral connection port is provided with threads. The spiral connection port is mated with the first spiral connection head through the threads.

5. A thyroid fine needle aspiration biopsy needle according to claim 2, characterized in that: It also includes a needle core that can be inserted into the needle tube, one end of the needle core is a conical needle tip for puncture, and the other end of the needle core is provided with a second spiral connector, and the second spiral connector matches the spiral connector port.

6. A thyroid fine needle aspiration biopsy needle according to claim 1, characterized in that: The main structure is in the shape of a hollow square tube, the connecting portion is fixedly arranged at one end of the main structure, and the vent hole is arranged at the other end of the main structure.

7. A thyroid fine needle aspiration biopsy needle according to claim 1, characterized in that: The flap assembly comprises a flap bonding platform and two flap leaves, wherein the flap bonding platform is fixedly arranged in the main structure, and gas passages are respectively left between the two sides of the flap bonding platform and the inner wall of the main structure; The valve leaf is sealingly and slidably connected to the inner wall of the main structure, the two valve leaves form an eight-shape and the inner sides face the two gas channels respectively, the operating button is connected to the valve leaf and drives the valve leaf to slide, and the valve leaf blocks or opens the gas channel when sliding, thereby switching the valve assembly between an open state and a closed state.

8. A thyroid fine needle aspiration biopsy needle according to claim 7, characterized in that: The operating handle is slidably connected to the outer wall of the main structure. The main structure is provided with a sliding hole. The valve leaf can slidably pass through the sliding hole and is fixedly connected to the operating handle.

9. A thyroid fine needle aspiration biopsy needle according to claim 8, characterized in that: A slide rail is fixedly arranged on the outer wall of the main structure, and the operating handle is slidably connected to the outer wall of the main structure via the slide rail.

10. A thyroid fine needle aspiration biopsy needle according to claim 2, characterized in that: The needle tube is composed of a needle tube body and a cell storage bin, the needle tip is located at one end of the needle tube body, and the cell storage bin is fixedly connected to the other end of the needle tube body.

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