A lancing device

Abstract

The utility model provides a kind of puncture device, it is related to medical instrument technical field, the puncture device includes: needle cylinder, the closed end of needle cylinder is equipped with mounting hole;Needle tube, needle tube is connected with the inside of mounting hole, part needle tube is arranged in the outside of needle cylinder;Piston shaft and piston, piston is connected with the one end of piston shaft, the inside of piston shaft is equipped with passage, passage penetrates the other end of piston and piston shaft, piston penetrates the open end of needle cylinder and is slidably connected in needle cylinder;Rubber plug, rubber plug is arranged in passage;Needle core, the tip of needle core can puncture rubber plug, and can penetrate passage and needle tube in turn, needle core is detachably connected with the other end of piston shaft;The puncture device utilizes injection negative pressure to be far away, combine needle core with injection structure, before the tip of needle core reaches target lesion, needle tube cannot be blocked or hyperemia phenomenon, can be through the mode of sustained negative pressure suction, ensure that minimally invasive FNA examination sample tissue volume maximization.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and more specifically, relates to a puncture device. Background Technology

[0002] Commercially available biopsy needles are typically quite thin (20G is commonly used), and common malignant thyroid lesions (papillary carcinoma) are quite hard. Therefore, the amount of tissue extracted is usually small, easily leading to misdiagnosis. Furthermore, the needle requires the doctor to hold the syringe and apply negative pressure during the puncture, but this cannot guarantee a continuous and stable negative pressure. Currently, for extracting tissue from suspected malignant thyroid lesions, some hospitals typically use a syringe needle. The doctor uses ultrasound to guide the needle deep into the suspected lesion to extract cells. The pathologist processes the specimen and evaluates the lesion under a microscope to provide a diagnosis. This method is the most widely used for suspected malignant thyroid lesions. However, because the syringe needle is hollow, it can easily become blocked by other tissues before reaching the target lesion, or encounter a blood vessel and instantly fill the needle with blood, resulting in a reduced or insufficient sample volume. Utility Model Content

[0003] The purpose of this invention is to provide a puncture device to address the shortcomings of existing technologies. This addresses the problems mentioned in the background section regarding the insufficient sample volume caused by the thinness of commonly used cell biopsy needles when extracting cell tissue from suspected malignant thyroid lesions, which cannot guarantee continuous and stable negative pressure. Additionally, it addresses the issue that some hospitals currently use syringe needles for sampling, but these needles are hollow and prone to blockage or congestion, resulting in reduced or insufficient sample volume.

[0004] To achieve the above objectives, this utility model provides a puncture device, which includes:

[0005] A syringe, wherein the closed end of the syringe is provided with a mounting hole;

[0006] A needle tube, wherein the needle tube is connected to the inside of the mounting hole, and a portion of the needle tube is disposed outside the syringe barrel;

[0007] A piston shaft and a piston, wherein the piston is connected to one end of the piston shaft, the piston shaft has a channel inside, the channel passes through the piston and the other end of the piston shaft, and the piston passes through the opening end of the syringe and is slidably connected inside the syringe;

[0008] A rubber stopper, wherein the rubber stopper is disposed within the channel;

[0009] The needle core has a tip that can pierce the rubber stopper and pass through the channel and the needle tube in sequence. The needle core is detachably connected to the other end of the piston shaft.

[0010] Preferably, the needle tube extends through the needle opening, and the needle tube has at least one vent hole on the side wall inside the syringe.

[0011] Preferably, the diameter of the channel is larger than the diameter of the needle tube, and one end of the needle tube can be inserted into the channel when the piston slides toward the mounting hole.

[0012] Preferably, the other end of the piston shaft is provided with a threaded hole communicating with the channel, the axis of the threaded hole and the axis of the channel are arranged on the same straight line, the puncture device also includes a threaded knob, the threaded knob is connected to the needle core, and the threaded knob can be threadedly connected to the threaded hole.

[0013] Preferably, the outer side of the piston shaft is provided with a plurality of slots spaced apart along the axis of the piston shaft, and the puncture device further includes a snap fastener, one end of which is movably connected to the outer side of the opening end of the syringe, and the other end of which can be inserted into one of the slots.

[0014] Preferably, the piston shaft has a transition hole inside between the channel and the threaded hole, and the diameter of part of the transition hole gradually decreases along the direction from the threaded hole to the channel.

[0015] Preferably, the puncture device further includes a handle connected to the other end of the piston shaft.

[0016] Preferably, the mounting hole extends toward the syringe to form a mounting head.

[0017] Preferably, the puncture device further includes a support handle, which is connected to the open end of the syringe, and one end of the locking piece is hinged to and slides on the support handle.

[0018] Preferably, the threaded knob includes a threaded post and a handle, with one end of the threaded post connected to the handle.

[0019] This invention provides a puncture device with the following advantages: the needle core is placed inside the needle tube, and the tip of the needle core penetrates the needle tube. During puncture, the tip of the needle core can easily and smoothly reach the target lesion, and no other tissue will block the needle tube before reaching the target lesion. The other end of the needle core is detachably connected to the piston shaft, which can connect the needle core to the piston shaft and fix the needle core on the piston shaft to ensure the stability of the needle core during puncture. After reaching the target lesion, the needle core is withdrawn, and the piston shaft is pulled to continuously generate negative pressure inside the syringe. Through continuous negative pressure aspiration, the cells and tissues in the target lesion are drawn into the needle tube to achieve sampling of the target lesion. After sampling, the needle core can be reinserted into the needle tube to push out all the cells and tissues in the needle tube, ensuring that the amount of specimen tissue is maximized.

[0020] This puncture device utilizes the principle of negative pressure injection, combining the needle core with the syringe structure. Before the tip of the needle core reaches the target lesion, the needle tube will not become blocked or congested. Furthermore, through continuous negative pressure aspiration, it ensures the maximum amount of tissue sample obtained for minimally invasive FNA examination, solving the problem of misdiagnosis and false negatives caused by insufficient tissue sample in FNA examination. It provides patients with the most accurate diagnosis with minimal trauma, truly achieving the goal of precise minimally invasive examination.

[0021] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0022] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0023] Figure 1 A schematic diagram of a puncture device according to an embodiment of the present invention is shown;

[0024] Figure 2 A schematic diagram of the syringe structure of a puncture device according to an embodiment of the present invention is shown;

[0025] Figure 3 A schematic diagram of the piston shaft structure of a puncture device according to an embodiment of the present invention is shown;

[0026] Figure 4 A schematic diagram of the needle core structure of a puncture device according to an embodiment of the present invention is shown.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Syringe; 2. Needle tube; 3. Piston shaft; 4. Piston; 5. Channel; 6. Rubber stopper; 7. Needle core; 8. Vent hole; 9. Threaded knob; 10. Slot; 11. Clip; 12. Handle; 13. Support handle. Detailed Implementation

[0029] Preferred embodiments of the present invention will now be described in more detail. While preferred embodiments of the present invention are described below, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0030] like Figures 1-4As shown, this utility model provides a puncture device, which includes:

[0031] Syringe 1, the closed end of syringe 1 is provided with a mounting hole;

[0032] Needle tube 2 is connected to the inside of the mounting hole, and part of needle tube 2 is located on the outside of syringe 1;

[0033] Piston shaft 3 and piston 4, piston 4 is connected to one end of piston shaft 3, piston shaft 3 has a channel 5 inside, channel 5 passes through piston 4 and the other end of piston shaft 3, piston 4 passes through the opening end of syringe 1 and is slidably connected inside syringe 1;

[0034] Rubber stopper 6 is installed inside channel 5;

[0035] The needle core 7 has a tip that can pierce the rubber stopper 6 and pass through the channel 5 and the needle tube 2 in sequence. The needle core 7 is detachably connected to the other end of the piston shaft 3.

[0036] Specifically, to address the problem that commonly used biopsy needles are too thin and cannot guarantee continuous and stable negative pressure when extracting cell tissue from suspected malignant thyroid lesions, resulting in insufficient sample volume; and that some hospitals currently use syringe needles for sampling, but because syringe needles are hollow, they are prone to clogging or congestion, leading to reduced or insufficient sample volume, this invention provides a puncture device. The piston 4 and rubber stopper 6 of this puncture device ensure the airtightness of the syringe 1. The needle core 7 of this puncture device is placed inside the needle tube 2, with its tip penetrating the needle tube 2. During puncture, the tip of the needle core 7 can easily and smoothly reach the target. The needle tube 2 is designed to be inserted into the lesion without any other tissue blocking it before reaching the target lesion. The needle core 7 is detachably connected to the other end of the piston shaft 3. The needle core 7 can be connected to the piston shaft 3 and fixed to the piston shaft 3 to ensure the stability of the needle core 7 during the puncture. After reaching the target lesion, the needle core 7 is withdrawn. By pulling the piston shaft 3, a continuous negative pressure is generated in the syringe 1. Through continuous negative pressure aspiration, the cells and tissues in the target lesion are drawn into the needle tube 2 to achieve sampling of the target lesion. After the sampling is completed, the needle core 7 can be reinserted into the needle tube 2 to push out all the cells and tissues in the needle tube 2, ensuring that the amount of specimen tissue is maximized.

[0037] This puncture device utilizes the principle of negative pressure injection, combining the needle core 7 with the syringe structure. Before the tip of the needle core 7 reaches the target lesion, the needle tube 2 will not experience blockage or congestion. Furthermore, through continuous negative pressure aspiration, it ensures the maximum amount of tissue sample obtained for minimally invasive FNA examination, solving the problem of misdiagnosis and false negatives caused by insufficient tissue sample volume in FNA examination. With minimal trauma, it provides patients with the most accurate diagnosis, truly achieving the goal of precise minimally invasive examination.

[0038] Preferably, the needle tube 2 passes through the needle opening, and the needle tube 2 has at least one vent hole 8 on the side wall inside the syringe 1.

[0039] Specifically, the needle tube 2 is provided with at least one vent hole 8 so that more and faster tumor cells and fluid tumor tissue can be extracted during cell and tissue sampling.

[0040] Preferably, the diameter of the channel 5 is larger than the diameter of the needle tube 2, and one end of the needle tube 2 can be inserted into the channel 5 when the piston 4 slides in the direction of the mounting hole.

[0041] Specifically, when the piston 4 slides toward the mounting hole, one end of the needle tube 2 can be inserted into the channel 5 and fit against the rubber stopper 6, so as to avoid the needle tube 2 restricting the sliding of the piston 4, and at the same time, it is convenient for the tip of the needle core 7 to be aligned and inserted into the needle tube 2.

[0042] Preferably, the other end of the piston shaft 3 is provided with a threaded hole communicating with the channel 5. The axis of the threaded hole and the axis of the channel are set on the same straight line. The puncture device also includes a threaded knob 9, which is connected to the needle core 7 and can be threadedly connected to the threaded hole.

[0043] Specifically, during puncture, the threaded knob 9 is threadedly connected to the threaded hole, fixing the needle core to the piston shaft 3 to ensure the stability of the needle core 7 during puncture.

[0044] Preferably, the outer side of the piston shaft 3 is provided with a plurality of slots 10 at intervals along the axis of the piston shaft 3, and the puncture device also includes a snap fastener 11, one end of which is movably connected to the outer side of the opening end of the syringe 1, and the other end of which can be inserted into one of the slots 10.

[0045] Specifically, during the extraction process, in order to solve the problem of the sample volume being affected by the different force applied by the doctor, the clip 11 of this application can be clipped into different segmented slots 10 according to the surgical situation, so as to provide different continuous and stable negative pressures, which is more beneficial for the extraction of cell tissues and can avoid affecting the sample volume of the puncture.

[0046] Preferably, the piston shaft 3 has a transition hole between the channel 5 and the threaded hole inside, and the diameter of part of the transition hole gradually decreases along the direction from the threaded hole to the channel 5.

[0047] Specifically, the tapered transition hole facilitates the tip of the needle core 7 to pierce the rubber stopper 6.

[0048] Preferably, the puncture device also includes a handle 12, which is connected to the other end of the piston shaft 3.

[0049] Specifically, the piston shaft 3 can be easily pulled out via the handle 12.

[0050] Preferably, the mounting hole extends in the direction of the syringe 1 to form a mounting head.

[0051] Specifically, the mounting head is integrally formed with the syringe 1 and is used to connect the needle tube 2.

[0052] Preferably, the puncture device further includes a support handle 13, which is connected to the open end of the syringe 1, and one end of the locking piece 11 is hinged and slides on the support handle 13.

[0053] Specifically, since one end of the latching piece 11 is hinged and slides on the support handle 13, the other end of the latching piece 11 can be inserted into one of the slots 10 by rotating and pushing the latching piece 11.

[0054] Preferably, the threaded knob 9 includes a threaded post and a handle, with one end of the threaded post connected to the handle.

[0055] Specifically, the operating handle facilitates the threaded connection of the threaded post into the threaded hole to fix the needle core 7.

[0056] In summary, when implementing the puncture device of this utility model, the tip of the needle core 7 pierces the rubber stopper 6 and passes through the channel 5 and needle tube 2 in sequence. During puncture, the tip of the needle core 7 can easily and smoothly reach the target lesion, and no other tissue will block the needle tube 2 before reaching the target lesion. Through the cooperation of the threaded knob 9 and the threaded hole, the needle core 7 can be threadedly connected to the piston shaft 3, and the needle core 7 is fixed on the piston shaft 3 to ensure the stability of the needle core 7 during puncture. When the target lesion is reached, the needle core 7 is withdrawn, and the piston shaft 3 is pulled to continuously generate negative pressure in the syringe 1. It can be stuck in different segmented slots 10 according to the surgical situation to provide different continuous and stable negative pressure. Through continuous negative pressure aspiration, sufficient cells and tissues from the target lesion are aspirated into the needle tube 2 to achieve sampling of the target lesion. After the sampling is completed, the needle core 7 can be reinserted into the needle tube 2 to push out all the cells and tissues in the needle tube 2, ensuring that the amount of specimen tissue is maximized.

[0057] This puncture device utilizes the principle of negative pressure injection, combining the needle core 7 with the syringe structure. Before the tip of the needle core 7 reaches the target lesion, the needle tube 2 will not experience blockage or congestion. Furthermore, through continuous negative pressure aspiration, it ensures the maximum amount of tissue sample obtained for minimally invasive FNA examination, solving the problem of misdiagnosis and false negatives caused by insufficient tissue sample volume in FNA examination. With minimal trauma, it provides patients with the most accurate diagnosis, truly achieving the goal of precise minimally invasive examination.

[0058] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A puncture device, characterized in that, The puncture device includes: A syringe, wherein the closed end of the syringe is provided with a mounting hole; A needle tube, wherein the needle tube is connected to the inside of the mounting hole, and a portion of the needle tube is disposed outside the syringe barrel; A piston shaft and a piston, wherein the piston is connected to one end of the piston shaft, the piston shaft has a channel inside, the channel passes through the piston and the other end of the piston shaft, and the piston passes through the opening end of the syringe and is slidably connected inside the syringe; A rubber stopper, wherein the rubber stopper is disposed within the channel; The needle core has a tip that can pierce the rubber stopper, which ensures the airtightness of the syringe and can pass through the channel and the needle tube in sequence. The needle core is detachably connected to the other end of the piston shaft. The needle tube extends through the needle opening, and the needle tube has at least one vent hole on the side wall inside the syringe. The diameter of the channel is larger than the diameter of the needle tube, and one end of the needle tube can be inserted into the channel when the piston slides toward the mounting hole; The piston shaft has multiple slots spaced apart along its axis on the outer side. The puncture device also includes a locking piece, one end of which is movably connected to the outer side of the opening end of the syringe, and the other end of which can be inserted into one of the slots to maintain a continuous negative pressure state.

2. The puncture device according to claim 1, characterized in that, The other end of the piston shaft is provided with a threaded hole communicating with the channel. The axis of the threaded hole and the axis of the channel are aligned on the same straight line. The puncture device also includes a threaded knob, which is connected to the needle core and can be threadedly connected to the threaded hole.

3. The puncture device according to claim 2, characterized in that, The piston shaft has a transition hole inside between the channel and the threaded hole, and the diameter of part of the transition hole gradually decreases along the direction of the threaded hole toward the channel.

4. The puncture device according to claim 1, characterized in that, The puncture device also includes a handle, which is connected to the other end of the piston shaft.

5. A puncture device according to claim 1, characterized in that, The mounting hole extends toward the syringe to form a mounting head.

6. A puncture device according to claim 1, characterized in that, The puncture device also includes a support handle, which is connected to the open end of the syringe, and one end of the locking piece is hinged to and slides on the support handle.

7. A puncture device according to claim 2, characterized in that, The threaded knob includes a threaded post and a handle, with one end of the threaded post connected to the handle.

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