Puncture drainage device for thyroid cyst

Abstract

The puncture drainage device comprises a needle core and an outer sleeve, a hollow inner cavity is defined by the needle core, a needle tip of the needle core is a conical tip, a needle hole is formed in the position close to the needle tip so as to be communicated with the hollow inner cavity, and liquid can smoothly flow out of the tail end of the needle core from the needle hole through the hollow inner cavity. The outer sleeve wraps the outer side of the needle core, the length of the needle core is larger than that of the outer sleeve, at least part of the structure of the needle point penetrates out of the outer sleeve, the needle hole is formed in the part of the structure, penetrating out of the outer sleeve, of the needle core, and a plurality of suction holes surrounding the needle core are formed in the side, close to the needle point, of the outer sleeve. The puncture drainage device for the thyroid cyst is simple in structure and convenient to operate, puncture point damage in the puncture process of the puncture drainage device can be reduced, the bleeding risk of a puncture channel is reduced, and secondary damage to a patient in the treatment process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and in particular to a puncture and drainage device for thyroid cysts. Background Art

[0002] The tip of the needle core of the cyst drainage tube in the prior art is formed into an oblique surface, and the needle tip is relatively sharp, which will cut the tissue and cause greater damage to the tissue during the puncture process. The thyroid gland has a rich blood supply and the puncture channel is prone to bleeding. During the puncture and replacement process, the needle tip is easy to shift, causing greater damage to the patient's tissue. In addition, the cyst drainage tube in the prior art is designed with a balloon or pigtail to prevent the drainage tube from falling off the cyst. The structure and operation are complicated, but thyroid cysts are superficial cysts, and the drainage tube can be fixed without using a complex balloon or pigtail structure. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a puncture and drainage device for thyroid cysts. This device has a simple structure and is easy to operate. It can reduce damage to the puncture point during the puncture process, reduce the risk of bleeding in the puncture channel, and reduce secondary damage to the patient during the treatment process. It also facilitates repeated flushing of the cyst and improves the success rate and safety of sclerosant injection.

[0004] To achieve the above-mentioned purpose, according to an embodiment of the present utility model, a puncture and drainage device for thyroid cysts is proposed, and the puncture and drainage device for thyroid cysts includes: a needle core, the needle core defines a hollow inner cavity, the needle tip of the needle core is formed as a conical tip, and a needle hole is opened near the needle tip to communicate with the hollow inner cavity, so that liquid can smoothly flow out from the tail end of the needle core through the needle hole through the hollow inner cavity; an outer sleeve, the outer sleeve is covered on the outside of the needle core, the length of the needle core is longer than the length of the outer sleeve, and at least part of the structure at the needle tip passes through the outer sleeve, and the needle hole is opened on the part of the structure of the needle core passing through the outer sleeve, and a plurality of suction holes arranged around the needle core are opened on one side of the outer sleeve close to the needle tip.

[0005] According to the embodiment of the utility model, the puncture and drainage device for thyroid cysts has a simple structure and is easy to operate. It can reduce the damage to the puncture point during the puncture process of the puncture and drainage device, reduce the risk of bleeding in the puncture channel, and reduce the secondary damage to the patient during the treatment process.

[0006] In addition, the puncture and drainage device for thyroid cysts according to the above embodiment of the present invention may also have the following additional technical features:

[0007] According to one embodiment of the present invention, the plurality of suction holes are provided within a first distance range on a side of the outer sleeve close to the needle tip.

[0008] According to one embodiment of the present invention, within the first distance range, the plurality of suction holes are evenly distributed along the axial direction of the outer sleeve;

[0009] And / or, the first distance is not greater than 3 cm and not less than 2 cm.

[0010] According to one embodiment of the present invention, the plurality of suction holes are evenly distributed in the circumferential direction of the outer sleeve;

[0011] And / or, the number of the suction holes is not less than 4.

[0012] According to an embodiment of the present invention, the suction hole is formed as an elliptical hole or a long hole.

[0013] According to an embodiment of the present invention, the length direction of the suction hole is parallel to the extension direction of the axis of the outer sleeve.

[0014] According to one embodiment of the present invention, the length of the suction hole is 2 mm-2.5 mm;

[0015] And / or, the width of the suction hole is 1.5 mm-2 mm.

[0016] According to one embodiment of the present utility model, the tail end of the needle core is provided with a needle cap, the tail end of the outer sleeve forms a first joint, the needle cap is sleeved on the outside of the first joint, the outer surface of the first joint is provided with an external thread, the inner surface of the needle cap is provided with an internal thread, and the needle cap and the first joint are threadedly connected through the external thread and the internal thread.

[0017] According to one embodiment of the present invention, the needle core includes at least a needle body, which is made of metal material; and / or the length of the needle body is 10cm-20cm; and / or the inner wall of the outer sleeve is tightly fitted with the needle body.

[0018] According to one embodiment of the present invention, the radial cross-sectional diameter of the outer sleeve is 2 mm to 2.5 mm.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 is a perspective view of a puncture and drainage device according to an embodiment of the present utility model;

[0022] Figure 2 is a cross-sectional view of a puncture and drainage device according to an embodiment of the present utility model;

[0023] Figure 3 yes Figure 2 A local enlarged view at point A;

[0024] Figure 4 yes Figure 2 A partial enlarged view at point B;

[0025] Figure 5 yes Figure 2 A partial enlarged view at point C.

[0026] Reference numerals:

[0027] Puncture and drainage device 100 , needle core 1 , needle body 11 , needle cap 12 , second connector 121 , needle tip 13 , needle hole 14 , hollow inner cavity 101 , outer sleeve 2 , suction hole 21 , first connector 22 , protective cap 3 . DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0031] The tip of the needle core of the cyst drainage tube in the prior art is formed into an oblique surface, and the needle tip is relatively sharp, which will cut the tissue and cause greater damage to the tissue during the puncture process. The thyroid gland has a rich blood supply and the puncture channel is prone to bleeding. During the puncture and replacement process, the needle tip is easy to shift, causing greater damage to the patient's tissue. In addition, the cyst drainage tube in the prior art is designed with a balloon or pigtail to prevent the drainage tube from falling off the cyst. The structure and operation are complicated, but thyroid cysts are superficial cysts, and the drainage tube can be fixed without using a complex balloon or pigtail structure.

[0032] To this end, the embodiment of the present invention designs a puncture and drainage device 100 for thyroid cysts, which has a simple structure, is easy to operate, and the needle tip 13 of the needle core 1 is formed into a conical tip. Therefore, the application of the puncture and drainage device 100 enables doctors to conveniently perform puncture, drainage, flushing and injection of drugs for thyroid cysts. The needle tip 13 of the needle core 1 of the puncture and drainage device 100 is formed into a conical tip, which can reduce the damage to the puncture point during the puncture process of the puncture and drainage device 100, reduce the risk of bleeding in the puncture channel, and reduce secondary damage to the patient during the treatment process.

[0033] The following describes a puncture and drainage device 100 for thyroid cysts according to an embodiment of the present invention with reference to the accompanying drawings.

[0034] like Figure 1-Figure 5 As shown, the puncture and drainage device 100 for thyroid cyst according to an embodiment of the present invention includes: a needle core 1 and an outer sleeve 2.

[0035] Among them, the outer sleeve 2 is coated on the outside of the needle core 1. The needle core 1 can be withdrawn from the inner part of the outer sleeve 2, so that the outer sleeve 2 is formed into a hollow tube to define a drainage channel. The tail of the outer sleeve 2 can be connected to a syringe to extract cystic fluid, repeatedly flush and inject liquid medicine, and finally connected to a drainage bag for drainage. Before puncture, the outer sleeve 2 is coated on the outside of the needle core 1. On the one hand, the high-strength needle core 1 structure is used to improve the overall strength of the puncture and drainage device 100, so that it has sufficient strength for puncture. The needle core 1 is also used to fill the drainage channel inside the outer sleeve 2 with a solid core, preventing human tissue from entering during the puncture process and clogging the drainage channel, affecting the extraction of pus.

[0036] The length of the needle core 1 is longer than the length of the outer sleeve 2 and at least part of the structure at the needle tip 13 passes through the outer sleeve 2, so that the needle tip 13 of the needle core 1 contacts the tissue first. The high-strength needle tip 13 structure of the needle core 1 increases the pressure at the contact point between the tip and the tissue during the puncture process, making it easier for the puncture and drainage device 100 to break through the tissue as a whole for puncture.

[0037] The needle core 1 defines a hollow inner cavity 101, and a needle hole 14 is provided near the needle tip 13 to communicate with the hollow inner cavity 101. Thus, whether the needle tip 13 is located inside the cyst can be determined by whether there is liquid flowing out of the tail end of the needle core 1. The needle hole 14 is provided on the portion of the structure where the needle core 1 passes through the outer sleeve 2. Thus, the needle hole 14 will not be covered by the outer sleeve 2. After the needle tip 13 is inserted into the cyst, the needle hole 14 can directly contact the pus in the cyst. When the needle hole 14 is located inside the cyst, since the pressure inside the human tissue is greater than the external pressure, the liquid can smoothly flow out of the needle hole 14 through the hollow inner cavity 101 from the tail end of the needle core 1. The doctor can determine that the needle hole 14 has been inserted into the cyst by the pus flowing out of the tail end.

[0038] The needle tip 13 of the needle core 1 is formed into a conical tip, which can reduce damage to the puncture point during the puncture process of the puncture and drainage device 100, reduce the risk of bleeding in the puncture channel, and reduce secondary damage to the patient during the treatment process.

[0039] A plurality of suction holes 21 arranged around the needle core 1 are provided on one side of the outer sleeve 2 near the needle tip 13. After the doctor determines that the needle hole 14 has been inserted into the cyst by the pus flowing out of the tail end of the needle core 1, the doctor will withdraw the needle core 1 through the tail end of the outer sleeve 2, and then continue to push the outer sleeve 2 forward a certain distance, so that the plurality of suction holes 21 arranged around the needle core 1 all enter the inside of the cyst. At this time, the syringe is connected to the tail end of the outer sleeve 2, and the pus in the cyst can be extracted with the syringe, and repeatedly flushed, and then the medicine is injected into the cyst after the pus is extracted, and finally a drainage bag is connected to the tail end of the outer sleeve 2 for drainage.

[0040] According to the embodiment of the utility model, the puncture and drainage device 100 for thyroid cysts has a simple structure and is easy to operate. It can reduce the damage to the puncture point during the puncture process of the puncture and drainage device 100, reduce the risk of bleeding in the puncture channel, and reduce secondary damage to the patient during the treatment process.

[0041] Reference Figure 2, multiple suction holes 21 are arranged within a first distance α on the side of the outer sleeve 2 close to the needle tip 13. The first distance range is determined according to the size of the cyst. In the prior art, the puncture and drainage device 100 for cysts is more suitable for large cysts. The distance range of the suction holes 21 is large. During the cyst fluid suction process, after the cyst shrinks, some of the suction holes 21 will be exposed outside the cyst, resulting in the puncture and drainage device 100 being unable to normally extract the pus inside the cyst.

[0042] In the embodiment of the present invention, the first distance α is smaller than the distribution range of the suction holes 21 in the prior art. Since the size of thyroid cysts is mostly distributed between 3 cm and 10 cm, the first distance α should not be greater than 3 cm.

[0043] Furthermore, the opening of the suction holes 21 will affect the strength of the outer sleeve 2. When too many suction holes 21 are opened within a certain distance, the strength there is too low, which will affect the stability of the shape of the outer sleeve 2 inside the cyst and affect the suction of pus. Therefore, the first distance is not less than 2 cm to avoid the aggregation of the suction holes 21 and ensure the strength of the outer sleeve 2 within the first distance range.

[0044] Reference Figure 2 and Figure 4 Within the first distance range, multiple suction holes 21 are evenly distributed along the axial direction of the outer cannula 2. This allows pus to be evenly aspirated from all locations within the first distance range within the cyst, and also allows for more even distribution of the drug during injection, ensuring both the suction and injection effectiveness of the puncture and drainage device 100. Furthermore, this ensures uniform strength throughout the first distance range of the outer cannula 2, preventing the presence of suction holes 21 from affecting the stability of the outer cannula 2 within the cyst.

[0045] Further, if Figure 2 and Figure 4 As shown, multiple suction holes 21 are evenly distributed around the outer sleeve 2, so that the pus around the outer sleeve 2 can be drained into the drainage channel defined by the outer sleeve 2 and led out of the body, avoiding the occurrence of dead corners in the cyst that cannot be sucked, ensuring that the pus can be completely drawn out, and, during the injection of the drug solution, the suction holes 21 evenly distributed around the circumference can also ensure that the drug solution is evenly distributed inside the cyst, so that all parts of the cyst can come into contact with the drug solution, ensuring the effectiveness of the drug solution.

[0046] In some embodiments, the number of suction holes 21 is no less than 4 to reduce the spacing angle between two adjacent suction holes 21 in the circumferential direction and reduce the dead angle between the suction holes 21 to ensure that the pus located around the outer sleeve 2 can be drained into the drainage channel defined by the outer sleeve 2 and drained out of the body, and the pus in the cyst can be completely drained to ensure that the medicine is evenly distributed inside the cyst.

[0047] In the prior art, the size and area of ​​the suction hole 21 are small, and it can only suck pus with lower viscosity. For pus with higher viscosity in thyroid cysts, the suction force is low and the suction effect is poor. For this reason, the size and area of ​​the suction hole 21 are increased in the embodiment of the present invention, so that the puncture and drainage device 100 has a better suction effect for pus with higher viscosity in thyroid cysts.

[0048] Since the size of the suction hole 21 in the circumferential direction of the outer sleeve 2 is limited by the circumferential length of the outer sleeve 2 itself, if the size of the suction hole 21 in the circumferential direction of the outer sleeve 2 is large, it will affect the strength of the outer sleeve 2 and the suction effect of the suction hole 21. Therefore, the embodiment of the present invention increases the area of ​​the suction hole 21 by increasing the length of the suction hole 21 in the axial direction of the outer sleeve 2, so as to increase the size area of ​​the suction hole 21.

[0049] Therefore, the suction hole 21 is formed as an elliptical hole or a long hole, so as to increase the size area of ​​the suction hole 21 without affecting the circumferential size of the suction hole 21 in the outer sleeve 2, thereby ensuring the strength of the outer sleeve 2, wherein the length direction of the suction hole 21 can be inclined along the extension direction of the axis of the outer sleeve 2 and extend toward one circumferential side of the outer sleeve 2.

[0050] In order to facilitate the formation of the suction hole 21 on the outer sleeve 2 , the length direction of the suction hole 21 may also be parallel to the extending direction of the axis of the outer sleeve 2 .

[0051] In some embodiments, the length a of the suction hole 21 is 2 mm to 2.5 mm, so as to increase the size and area of ​​the suction hole 21 so that the suction hole 21 can suction thick pus.

[0052] And / or, the width b of the suction hole 21 is 1.5 mm-2 mm, so as to prevent the opening of the suction hole 21 from affecting the strength of the outer sleeve 2 .

[0053] Specifically, the suction hole 21 can be an elliptical hole with a major axis length of 2 mm and a minor axis length of 1.5 mm, or the suction hole 21 can be an elliptical hole with a major axis length of 2.5 mm and a minor axis length of 2 mm, or the suction hole 21 can be a circular hole with a diameter of 2 mm, or the suction hole 21 is a long hole formed by semicircular holes with a radius of 1 mm on both sides in the length direction and a rectangular hole with a length of 2 mm and a width of 0.5 mm in the middle, etc. The specific shape and size of the suction hole 21 are not limited here.

[0054] like Figure 1 、 Figure 3 and Figure 5As shown, a first connector 22 is formed at the tail end of the outer sleeve 2, and the inner cavity of the first connector 22 is connected to the suction hole 21. The outer surface of the first connector 22 is provided with an external thread. The external thread on the outer side of the first connector 22 can be connected to the threaded interface of a conventional drainage bag, which is convenient for finally connecting the drainage bag to the tail of the outer sleeve 2 for drainage. The first connector 22 can also be plugged into and matched with a syringe. Inserting the syringe into the first connector 22 can facilitate the syringe to aspirate pus and flush the cyst, as well as inject drugs into the cyst.

[0055] Furthermore, a needle cap 12 is provided at the tail end of the needle core 1, and the inner surface of the needle cap 12 is provided with an internal thread. The needle cap 12 is sleeved on the outside of the first joint 22, and the needle cap 12 and the first joint 22 are connected by the external thread and the internal thread. On the one hand, the needle core 1 can be fixed inside the outer sleeve 2 by the cooperation of the needle cap 12 and the external thread of the first joint 22, ensuring the stability of the puncture and drainage device 100 during the entire puncture process. On the other hand, the needle cap 12 is sleeved outside the first joint 22, and can also protect the first joint 22 to avoid contamination of the first joint 22 of the outer sleeve 2. Moreover, the threaded cooperation of the needle cap 12 and the first joint 22 can also ensure that the outer sleeve 2 is tightly fitted with the needle body 11 to avoid the formation of cavities and liquid intrusion.

[0056] like Figure 5 As shown, the tail end of the needle cap 12 is formed with a second connector 121. The inner cavity of the second connector 121 is connected to the needle hole 14. The second connector 121 can be plugged into and matched with a syringe. Inserting the syringe into the second connector 121 facilitates aspiration by the syringe, allowing medical personnel to determine whether the needle hole 14 has reached the cyst by whether cyst fluid can be aspirated. The outer surface of the second connector 121 is provided with an external thread. The puncture and drainage device 100 also includes a protective cap 3. The inner surface of the protective cap 3 is provided with an internal thread. The protective cap 3 is sleeved on the outside of the second connector 121. The protective cap 3 and the second connector 121 are connected by the external and internal threads. The protective cap 3 protects the second connector 121 and prevents contamination of the second connector 121.

[0057] like Figure 1 and Figure 3 As shown, the needle core 1 at least includes a needle body 11, which is made of a metal material. The needle body 11 made of the metal material has high strength for puncture.

[0058] Furthermore, the length of the needle body 11 ranges from 10 cm to 20 cm. This allows for both single punctures and indwelling drainage, meeting the requirements of medical procedures at varying depths. Since thyroid cysts are superficial, the needle body 11 does not need to be excessively long. Therefore, the needle body 11 is no longer than 20 cm, reducing the difficulty of puncture and the production cost of the puncture and drainage device 100.

[0059] The outer surface of the outer sleeve 2 is marked with scales from the needle tip 13 side close to the needle core 1 to the needle tail side to assist the doctor in judging the depth of insertion of the puncture and drainage device 100 into the tissue.

[0060] Furthermore, the inner wall of the outer sleeve 2 is tightly fitted with the needle body 11 to avoid a cavity between the inner wall of the outer sleeve 2 and the needle body 11, which would cause liquid intrusion and affect the position determination of the needle tip 13 and the extraction of pus.

[0061] Among them, the radial cross-sectional diameter length of the outer sleeve 2 is 2mm-2.5mm. Therefore, the diameter length of the part of the entire puncture and drainage device 100 that punctures the tissue is between 2mm-2.5mm, so as to ensure that the drainage channel defined by the outer sleeve 2 has sufficient space to ensure that the pus inside the thyroid cyst can be extracted, while reducing the diameter length of the outer sleeve 2 as much as possible, so as to ensure that the damage area of ​​the puncture part is smaller with a smaller diameter, thereby reducing the damage to the patient during the operation.

[0062] A specific embodiment of the puncture and drainage device 100 for thyroid cysts of the present invention will be described below with reference to the accompanying drawings.

[0063] The thyroid gland has a rich blood supply. Cysts in the thyroid gland are mostly caused by internal bleeding. The size of thyroid cysts that need treatment is mostly between 3cm and 10cm. The thyroid gland is a superficial organ, and thyroid cysts are superficial organ cysts. The cyst drainage tubes in the existing technology are applicable to deep organ cysts. The overall length of the cyst drainage tubes is relatively long, the design structure is complex, and the operation process is complex. Traditionally, ordinary syringes are used to treat superficial organ cysts. However, ordinary syringes have great limitations in the treatment of cysts. The drainage of pus in the cyst is not thorough, which is not conducive to flushing and injecting drugs, resulting in poor treatment effects.

[0064] The puncture and drainage device 100 of the embodiment of the present invention can be used for puncturing superficial cysts including thyroid cysts, draining pus inside thyroid cysts, and injecting liquid medicine.

[0065] like Figure 1-Figure 4 As shown, the puncture and drainage device 100 for thyroid cysts provided according to an embodiment of the present invention includes: a needle core 1 and an outer sleeve 2.

[0066] Among them, the outer sleeve 2 is coated on the outside of the needle core 1. The needle core 1 can be withdrawn from the inner part of the outer sleeve 2, so that the outer sleeve 2 is formed into a hollow tube to define a drainage channel. The tail of the outer sleeve 2 can be connected to a syringe to extract cystic fluid, repeatedly flush and inject liquid medicine, and finally connected to a drainage bag for drainage. Before puncture, the outer sleeve 2 is coated on the outside of the needle core 1. On the one hand, the high-strength needle core 1 structure is used to improve the overall strength of the puncture and drainage device 100, so that it has sufficient strength for puncture. The needle core 1 is also used to fill the drainage channel inside the outer sleeve 2 with a solid core, preventing human tissue from entering during the puncture process and clogging the drainage channel, affecting the extraction of pus.

[0067] The length of the needle core 1 is longer than the length of the outer sleeve 2 and at least part of the structure at the needle tip 13 passes through the outer sleeve 2, so that the needle tip 13 of the needle core 1 contacts the tissue first. The high-strength needle tip 13 structure of the needle core 1 increases the pressure at the contact point between the tip and the tissue during the puncture process, making it easier for the puncture and drainage device 100 to break through the tissue as a whole for puncture.

[0068] The needle core 1 defines a hollow inner cavity 101, and a needle hole 14 is provided near the needle tip 13 to communicate with the hollow inner cavity 101. Thus, whether the needle tip 13 is located inside the cyst can be determined by whether there is liquid flowing out of the tail end of the needle core 1. The needle hole 14 is provided on the portion of the structure where the needle core 1 passes through the outer sleeve 2. Thus, the needle hole 14 will not be covered by the outer sleeve 2. After the needle tip 13 is inserted into the cyst, the needle hole 14 can directly contact the pus in the cyst. When the needle hole 14 is located inside the cyst, since the pressure inside the human tissue is greater than the external pressure, the liquid can smoothly flow out of the needle hole 14 through the hollow inner cavity 101 from the tail end of the needle core 1. The doctor can determine that the needle hole 14 has been inserted into the cyst by the pus flowing out of the tail end.

[0069] The needle tip 13 of the needle core 1 is formed into a conical tip, which can reduce damage to the puncture point during the puncture process of the puncture and drainage device 100, reduce the risk of bleeding in the puncture channel, and reduce secondary damage to the patient during the treatment process.

[0070] Within a distance of 2 cm on one side of the outer cannula 2 close to the needle tip 13, four suction holes 21 arranged around the needle core 1 are evenly distributed along the axial direction of the outer cannula 2. The four suction holes 21 arranged around the needle core 1 are evenly distributed in the circumferential direction of the outer cannula 2. After the doctor judges that the needle hole 14 has been inserted into the cyst by the pus flowing out of the tail end of the needle core 1, the doctor will withdraw the needle core 1 through the tail end of the outer cannula 2, and then continue to advance a distance of 2 cm, so that multiple suction holes 21 arranged around the needle core 1 enter the inside of the cyst. At this time, the syringe is connected to the tail end of the outer cannula 2, and the pus in the cyst can be extracted by the syringe, and repeatedly flushed, and then the medicine is injected into the cyst after the pus is extracted. Finally, a drainage bag is connected to the tail end of the outer cannula 2 for drainage.

[0071] The suction hole 21 is formed as an elliptical hole with a major axis length of 2 mm and a minor axis length of 1.5 mm. The suction hole 21 has a larger size and area, which is conducive to suctioning the cystic fluid with a higher viscosity in the cyst.

[0072] A first connector 22 is provided at the tail end of the outer sleeve 2, and an outer surface of the first connector 22 is provided with an external thread. The external thread on the outside of the first connector 22 can be connected to the threaded interface of a conventional drainage bag, which is convenient for connecting the drainage bag to the tail of the outer sleeve 2 for drainage. The first connector 22 can also be plugged into and matched with a syringe. Inserting the syringe into the first connector 22 can facilitate the syringe to aspirate pus and flush the cyst, as well as inject drugs into the cyst.

[0073] Furthermore, the needle core 1 includes a needle body 11 and a needle cap 12 connected to the tail end of the needle body 11. The inner surface of the needle cap 12 is provided with an internal thread. The needle cap 12 is sleeved on the outside of the first joint 22. The needle cap 12 and the first joint 22 are connected through external threads and internal threads. On the one hand, the needle core 1 can be fixed inside the outer sleeve 2 by the cooperation of the needle cap 12 and the external threads of the first joint 22, ensuring the stability of the puncture and drainage device 100 during the entire puncture process. On the other hand, the needle cap 12 is sleeved on the outside of the first joint 22, and can also protect the first joint 22 to avoid contamination at the first joint 22 of the outer sleeve 2. Moreover, through the threaded cooperation of the needle cap 12 and the first joint 22, it can also ensure that the outer sleeve 2 is tightly fitted with the needle body 11 to avoid the formation of cavities and liquid intrusion.

[0074] The tail end of the needle cap 12 is formed with a second connector 121. The inner cavity of the second connector 121 is connected to the needle hole 14. The second connector 121 can be plugged into and matched with a syringe. Inserting the syringe into the second connector 121 facilitates aspiration by the syringe, allowing medical personnel to determine whether the needle hole 14 has reached the cyst by whether cyst fluid can be aspirated. The outer surface of the second connector 121 is provided with an external thread. The puncture and drainage device 100 also includes a protective cap 3. The inner surface of the protective cap 3 is provided with an internal thread. The protective cap 3 is mounted on the outside of the second connector 121. The protective cap 3 and the second connector 121 are connected by the external and internal threads. The protective cap 3 protects the second connector 121 and prevents contamination of the second connector 121.

[0075] The length of the needle body 11 is 10cm-20cm. Since thyroid cysts are superficial cysts, the length of the needle body 11 does not need to be set too long. Therefore, the length of the needle body 11 is not greater than 20cm to reduce the puncture difficulty and production cost of the puncture and drainage device 100.

[0076] The outer surface of the outer sleeve 2 is marked with scales from the needle tip 13 side close to the needle core 1 to the needle tail side to assist the doctor in judging the depth of insertion of the puncture and drainage device 100 into the tissue.

[0077] Furthermore, the inner wall of the outer sleeve 2 is tightly fitted with the needle body 11 to avoid a cavity between the inner wall of the outer sleeve 2 and the needle body 11, which would cause liquid intrusion and affect the position determination of the needle tip 13 and the extraction of pus.

[0078] Among them, the radial cross-sectional diameter length of the outer sleeve 2 is 2mm-2.5mm. Therefore, the diameter length of the part of the entire puncture and drainage device 100 that punctures the tissue is between 2mm-2.5mm, so as to ensure that the drainage channel defined by the outer sleeve 2 has sufficient space to ensure that the cystic fluid inside the thyroid cyst can be extracted, while reducing the diameter length of the outer sleeve 2 as much as possible, so as to ensure that the damage area of ​​the puncture part is smaller with a smaller diameter, thereby reducing the damage to the patient during the operation.

[0079] The needle body 11 of the needle core 1 is made of metal to ensure that the needle body 11 has high strength for puncture. The outer sleeve 2 is a plastic hose, which uses its own elasticity to ensure that the inner wall of the outer sleeve 2 and the needle body 11 are tightly fitted and reduce damage to the tissue caused by the outer sleeve 2.

[0080] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0081] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A puncture and drainage device for thyroid cysts, characterized in that: include: A needle core, wherein the needle core defines a hollow inner cavity, the needle tip of the needle core is formed as a conical tip, a needle hole is provided near the needle tip to communicate with the hollow inner cavity, and liquid can smoothly flow out of the tail end of the needle core from the needle hole through the hollow inner cavity; An outer sleeve, the outer sleeve is covered on the outside of the needle core, the length of the needle core is longer than the length of the outer sleeve, and at least part of the structure at the needle tip passes through the outer sleeve, and the needle hole is opened on the part of the structure where the needle core passes through the outer sleeve, and a plurality of suction holes arranged around the needle core are opened on one side of the outer sleeve close to the needle tip.

2. A puncture and drainage device for thyroid cysts according to claim 1, characterized in that: The plurality of suction holes are arranged within a first distance range on a side of the outer sleeve close to the needle tip.

3. A puncture and drainage device for thyroid cyst according to claim 2, characterized in that: Within the first distance range, the plurality of suction holes are evenly distributed along the axial direction of the outer sleeve; And / or, the first distance is not greater than 3 cm and not less than 2 cm.

4. A puncture and drainage device for thyroid cysts according to claim 1, characterized in that: The plurality of suction holes are evenly distributed in the circumferential direction of the outer sleeve; And / or, the number of the suction holes is not less than 4.

5. A puncture and drainage device for thyroid cyst according to claim 1, characterized in that: The suction hole is formed as an elliptical hole or a long hole.

6. A puncture and drainage device for thyroid cysts according to claim 5, characterized in that: The length direction of the suction hole is parallel to the extending direction of the axis of the outer sleeve.

7. A puncture and drainage device for thyroid cysts according to claim 5, characterized in that: The length of the suction hole is 2mm-2.5mm; And / or, the width of the suction hole is 1.5 mm-2 mm.

8. A puncture and drainage device for thyroid cyst according to claim 1, characterized in that: A needle cap is provided at the tail end of the needle core, and the tail end of the outer sleeve forms a first joint. The needle cap is sleeved on the outside of the first joint. The outer surface of the first joint is provided with an external thread, and the inner surface of the needle cap is provided with an internal thread. The needle cap and the first joint are threadably connected through the external thread and the internal thread.

9. A puncture and drainage device for thyroid cyst according to claim 1, characterized in that: The needle core at least comprises a needle body, and the needle body is made of metal material; and / or the length of the needle body is 10cm-20cm; and / or the inner wall of the outer sleeve is tightly fitted with the needle body.

10. A puncture and drainage device for thyroid cysts according to claim 1, characterized in that: The radial cross-sectional diameter of the outer sleeve is 2 mm to 2.5 mm.

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