Neck puncture device

Abstract

The utility model discloses a cervical puncture device which comprises a first dilator, a second dilator, a catheter sheath, a first catheter and a hardened sleeve, and the second dilator is arranged in the first dilator; a catheter sheath is mounted in the second dilator, and a first catheter is mounted in the catheter sheath; a hardening sleeve is inserted into the first catheter, and a core penetrating needle or a core penetrating pipe is installed in the hardening sleeve; and the core-through needle is mounted in the hardened sleeve through the second catheter. The puncture device is provided with two sets of puncture mechanisms, namely the puncture tube and the puncture needle, so that the purchase cost and the use cost are reduced; during use, the operation time increase caused by replacement of the puncture tube or the puncture needle and the infection risk caused by replacement of the tube sheath are avoided; the hardening sleeve is provided with the bending part, so that the angle is convenient to adjust, and the fracture risk during use is also reduced.

Description

Technical Field

[0001] The utility model relates to a puncture device, in particular to a transcervical puncture device, and belongs to the technical field of interventional medical equipment. Background Art

[0002] Transjugular intrahepatic portosystemic shunt (TIPS) is a minimally invasive interventional technology for the treatment of complications such as refractory ascites and gastrointestinal bleeding caused by portal hypertension in cirrhosis. Its essence is a restrictive side-to-side portosystemic shunt in the liver. Through the internal jugular vein-superior vena cava-right atrium-inferior vena cava-right hepatic vein pathway, an artificial portosystemic shunt channel is established between the right hepatic vein or the posterior inferior vena cava and the portal vein branches to achieve the effect of reducing portal vein pressure.

[0003] Among the existing technologies, the most widely used one at home and abroad is the transjugular intrahepatic puncture instrument. However, the current transjugular puncture instrument cannot achieve compatible use of the puncture tube kit and the puncture needle kit, and cannot cope with complex usage situations. For example, when encountering areas with severe liver cirrhosis, the puncture tube is more effective. The existing puncture equipment either only has the function of a puncture needle or only has the function of a puncture tube, which leads to an increase in procurement and use costs. At the same time, replacing the equipment will also increase the operation time and the risk of infection. Moreover, the existing transjugular puncture equipment has inconvenient angles, which also brings inconvenience to the operation. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a transcervical puncture device, which solves the problem that it is difficult to establish a blood passage between the hepatic portal veins.

[0005] The technical problem to be solved by the utility model is achieved by adopting the following technical solutions:

[0006] The utility model provides a transcervical puncture device, comprising a first dilator, a second dilator, a catheter sheath, a first catheter and a hardened sleeve, wherein the first dilator or the second dilator is installed in the catheter sheath; the first catheter is installed in the catheter sheath; the hardened sleeve is inserted into the first catheter, wherein a core needle or a core tube is installed in the hardened sleeve.

[0007] As a preferred technical solution of the utility model, the core needle is installed in the hardened sleeve through a second catheter.

[0008] As a preferred technical solution of the utility model, the first expander includes a first expander connector, which is connected to the end of the first expander tube of the first expander, a first expander tip portion, which is integrally formed with the first expander tube, and a first expander pore portion is arranged inside the first expander; the effective length of the first expander is 150mm-250mm; the second expander includes a second expander connector, which is connected to the end of the second expander tube of the second expander, a second expander tip portion, which is integrally formed with the second expander tube, and a second expander pore portion is arranged inside the second expander; the effective length of the second expander is 500mm-600mm.

[0009] As a preferred technical solution of the utility model, the catheter sheath includes a catheter sheath connector, which is connected to the end of the catheter sheath tube of the catheter sheath, and the catheter sheath tip is integrally formed with the catheter sheath tube, and a catheter sheath pore portion is provided inside the catheter sheath tip;

[0010] A three-way valve connected to the catheter sheath connector;

[0011] The developing ring is arranged on the catheter sheath tube;

[0012] The catheter sheath tube comprises an inner layer, a middle layer and an outer layer from the inside to the outside, wherein:

[0013] The inner layer is made of PTFE.

[0014] The middle layer is made of stainless steel.

[0015] The outer layer is made of PEBAX;

[0016] The effective length of the catheter sheath is 400mm-500mm.

[0017] As a preferred technical solution of the present utility model, the first catheter includes a first catheter connector, which is connected to the end of the first catheter pipe of the first catheter, and a first catheter tip portion, which is integrally formed with the first catheter and has a first catheter pore portion arranged therein; the effective length of the first catheter is 500mm-560mm.

[0018] As a preferred technical solution of the utility model, the hardened casing includes a hardened casing connector, which is connected to the end of the hardened casing first pipe fitting of the hardened casing, wherein the hardened casing first pipe fitting is integrally connected with the hardened casing second pipe fitting; the hardened casing tip is integrally formed with the hardened casing second pipe fitting, and a hardened casing pore portion is provided inside the hardened casing tip; a hardened casing bending portion is formed by bending between the hardened casing first pipe fitting and the hardened casing second pipe fitting, wherein the sum of the effective lengths of the hardened casing first pipe fitting and the hardened casing second pipe fitting is 500mm-560mm.

[0019] As a preferred technical solution of the present utility model, the second catheter includes a second catheter connector, which is connected to the end of the second catheter pipe fitting of the second catheter, and a second catheter tip portion, which is integrally formed with the second catheter pipe fitting and has a second catheter pore portion arranged therein; the effective length of the second catheter pipe fitting is 550mm-660mm.

[0020] As a preferred technical solution of the utility model, the core needle includes a core needle connector and a core needle body connected thereto, wherein the end of the core needle body is provided with a core needle tip portion integrally formed therewith; the angle of the core needle tip portion is 15°-65°; and the effective length of the core needle body is 600mm-700mm.

[0021] Preferably, the core tube includes a core tube connector, which is connected to the core tube fitting of the core tube; a core tube tip, which is integrally formed with the core tube fitting, wherein the angle of the core tube tip is 15°-65°; and the effective length of the core tube fitting is 550mm-650mm.

[0022] Further preferably, a special-shaped portion is formed on the tip of the core-through tube, wherein the special-shaped portion includes an arc shape.

[0023] The beneficial effects of the utility model are as follows: the puncture device of the utility model has two sets of puncture mechanisms, namely a puncture tube and a puncture needle, which reduces the purchase and use costs; when in use, it avoids the increase in operation time caused by replacing the puncture tube or the puncture needle and the risk of infection caused by replacing the tube sheath; the hardened sleeve of the utility model has a bending part, which is convenient for angle adjustment and also reduces the risk of breakage during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is one of the structural diagrams of the utility model;

[0025] Figure 2 This is the second structural diagram of the utility model;

[0026] Figure 3 This is the third structural diagram of the utility model;

[0027] Figure 4 This is the fourth structural diagram of the utility model;

[0028] Figure 5 This is the fifth structural diagram of the utility model;

[0029] Figure 6 This is the sixth structural diagram of the utility model;

[0030] Figure 7 This is the seventh structural diagram of the utility model;

[0031] Figure 8 This is the eighth structural diagram of the utility model;

[0032] Fig. 9 This is the ninth structural diagram of the utility model;

[0033] Fig.10 This is the tenth structural diagram of the utility model;

[0034] Fig.11 This is the eleventh structural diagram of the utility model;

[0035] Fig.12 This is the twelfth structural diagram of the utility model;

[0036] Fig.13 This is the thirteenth structural diagram of the utility model;

[0037] Fig.14 This is the fourteenth structural diagram of the utility model;

[0038] Fig.15 This is the fifteenth structural diagram of the utility model;

[0039] Fig.16 This is the sixteenth structural diagram of the utility model;

[0040] In the figure: 1, first dilator; 11, first dilator connecting piece; 12, first dilator tube; 13,

[0041] The first dilator tip; 14, the first dilator aperture; 2, the second dilator; 21, the second dilator connector; 22, the second dilator tube; 23, the second dilator tip; 24, the second dilator aperture; 3, the catheter sheath; 31, the catheter sheath connector; 32, the catheter sheath tube; 33, the catheter sheath tip; 34, the catheter sheath aperture; 35, the three-way valve; 36, the developing ring; 4, the first catheter; 41, the first catheter connector; 42, the first catheter tube; 43, the first catheter tip; 44, the first catheter aperture; 5, the hardened sleeve; 51, Hardened sleeve connector; 52, hardened sleeve first pipe fitting; 521, hardened sleeve second pipe fitting; 522, hardened sleeve bending portion; 53, hardened sleeve tip; 54, hardened sleeve aperture; 6, second conduit; 61, second conduit connector; 62, second conduit pipe fitting; 63, second conduit tip; 64, second conduit aperture; 7, core pass needle; 71, core pass needle connector; 72, core pass needle body; 73, core pass needle tip; 8, core pass tube; 81, core pass tube connector; 82, core pass tube pipe fitting; 83, core pass tube tip; 831, special-shaped portion. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0043] Example 1

[0044] like Figure 1-14 As shown, this embodiment provides a transcervical puncture device, including a first dilator 1, a second dilator 2, a catheter sheath 3, a first catheter 4 and a hardened sleeve 5, wherein the first dilator 1 or the second dilator 2 is installed in the catheter sheath 3; the first catheter 4 is installed in the catheter sheath 3; the hardened sleeve 5 is inserted in the first catheter 4, wherein a core needle 7 or a core tube 8 is installed in the hardened sleeve 5. When in use, the core needle 7 or the core tube 8 is selected as needed. When replacing, there is no need to remove the catheter sheath 3, thereby avoiding the risk of infection caused by replacing the core needle 7 or the core tube 8.

[0045] Specifically, when the core needle 7 is used, the core needle 7 is installed in the hardened sleeve 5 through the second catheter 6. Preferably, in this embodiment, the bending angle of the hardened sleeve 5 is greater than 30°, and is between 30°-60°, such as 35°, 42°, 51°, etc. In the prior art, the bending angle of the hardened sleeve 5 (the angle between the bending part and the extension line of the non-bending part) is generally less than 30°. In actual procedures, when the physiological angle between the hepatic vein and the central vein is greater than 30°, the hardened sleeve 5 cannot fit the hepatic vein well.

[0046] The angle in this example allows for a better fit to the hepatic vein.

[0047] The first dilator 1 in this embodiment includes a first dilator connector 11, which is made of a polymer material (preferably high-density polyethylene), and is provided with a Luer thread at the end thereof for easy matching with other accessories, and is connected to the end of a first dilator tube 12 of the first dilator 1, and the tube contains a BaSO4 component so that it has a developing performance under X-rays; a first dilator tip 13, which has good blood vessel access performance, is integrally formed with the first dilator tube 12, and is provided with a first dilator aperture 14 inside thereof, and the aperture allows a guide wire of about 0.035 inches to pass through; in this embodiment, the effective length of the first dilator 1 is 150 mm-250 mm;

[0048] The second expander 2 in this embodiment includes a second expander connector 21, a polymer material (preferably

[0049] The second dilator 2 is made of high-density polyethylene (HDPE), and the end is provided with a Luer thread to facilitate matching with other accessories. It is connected to the end of the second dilator tube 22 of the second dilator 2. The tube contains BaSO4 components to enable it to have a developing performance under X-rays; the second dilator tip 23 enables it to have good blood vessel access performance, and is integrally formed with the second dilator tube 22. A second dilator aperture 24 is provided inside it, and the aperture allows a 0.035-inch guide wire to pass through; in this embodiment, the effective length of the second dilator 2 is 500mm-600mm. The catheter sheath 3 in this embodiment includes a catheter sheath connector 31, which is preferably made of polyamide, and has a silicone sealing ring inside to increase the sealing performance. It is connected to the end of the catheter sheath tube 32 of the catheter sheath 3. The catheter sheath tip 33 is integrally formed with the catheter sheath tube 32 to facilitate blood vessel passage performance, and a catheter sheath aperture 34 is provided inside it, and the aperture facilitates the passage of the assembly of the first catheter 4 and the hardened sleeve 5;

[0050] In this embodiment, the catheter sheath 3 also includes a three-way valve 35, which is connected to the catheter sheath connector 31; in another preferred embodiment of the utility model, a developing ring 36 is arranged on the catheter sheath tube 32, so that it has developing performance under X-rays; in another preferred embodiment of the utility model, the catheter sheath tube 32 is respectively an inner layer 321, a middle layer 322 and an outer layer 323 from the inside to the outside, wherein the inner layer 321 is made of PTFE, the middle layer 322 is made of stainless steel, and the outer layer 323 is made of PEBAX. The effective length of the catheter sheath 3 is 400mm-500mm. Specifically, the middle layer is a SS double helix of 304 stainless steel, which enhances the strength and stability of the structure.

[0051] The first conduit 4 in this embodiment includes a first conduit connector 41, made of a polymer material (preferably a polymer

[0052] The first catheter 4 is made of high-density polyethylene (HDPE), and the end is provided with a Luer thread for easy adaptation to other accessories. It is connected to the end of the first catheter pipe fitting 42 of the first catheter 4. The pipe fitting contains BaSO4 components to enable it to have development performance under X-rays; the first catheter tip 43 is integrally formed with the first catheter 4, and the tip enables the first catheter 4 to better pass into the catheter sheath 3, and a first catheter aperture portion 44 is provided inside it, and the aperture portion facilitates the passage of the hardened sleeve 5; the effective length of the first catheter 4 is 500mm-560mm.

[0053] The hardened sleeve 5 in this embodiment includes a hardened sleeve connector 51, which is made of a polymer material (preferably high-density polyethylene), and the end is provided with a Luer thread for easy adaptation to other accessories. It is connected to the end of the hardened sleeve first pipe fitting 52 of the hardened sleeve 5, wherein the hardened sleeve first pipe fitting 52 is integrally connected with the hardened sleeve second pipe fitting 521. Specifically, a hardened sleeve bending portion 522 is formed between the hardened sleeve first pipe fitting 52 and the hardened sleeve second pipe fitting 521, which plays a role in controlling the puncture direction and can be more closely fitted to the hepatic vein area for puncture. The pipe fitting is preferably made of 304 stainless steel; the hardened sleeve tip portion 53 is integrally formed with the hardened sleeve second pipe fitting 521, and a hardened sleeve aperture portion 54 is provided therein, which facilitates its entry into the first catheter 4; the sum of the effective lengths of the hardened sleeve first pipe fitting 52 and the hardened sleeve second pipe fitting 521 is 500mm-560mm.

[0054] The second catheter 6 in this embodiment includes a second catheter connector 61, which is made of a polymer material (preferably high-density polyethylene), and is provided with a Luer thread at the end to facilitate adaptation to other accessories. It is connected to the end of a second catheter pipe fitting 62 of the second catheter 6, and the pipe fitting contains a BaSO4 component to enable it to have development performance under X-rays; the second catheter tip 63 is integrally formed with the second catheter pipe fitting 62, and the tip 63 is convenient for passing into the hardened sleeve 5, and a second catheter aperture 64 is provided inside the tip 63, which facilitates the passage of the core needle 7; the effective length of the second catheter pipe fitting 62 is 550mm-660mm. The core needle 7 includes a core needle connector 71 and a core needle body 72 connected thereto, wherein the end of the core needle body 72 is provided with a core needle tip portion 73 integrally formed therewith, the core needle connector 71 is preferably made of high-density polyethylene, and the front end has a Luer thread to make it compatible with the second catheter 6; the core needle body 72 is preferably made of nickel-titanium alloy to improve its bending resistance; in this embodiment, the angle of the core needle tip portion 73 is 15°-65°, such as 20°, 30°, 40°, 50°, 60°; the effective length of the core needle body 72 is 600mm-700mm.

[0055] The core tube 8 in this embodiment includes a core tube connector 81, which is preferably made of high-density polyethylene and has a Luer thread at the front end for easy connection with other equipment. The core tube connector 81 is connected to the core tube fitting 82 of the core tube 8, and the fitting is made of stainless steel 304, and the pipe section is resistant to bending; the core tube tip 83 is integrally formed with the core tube fitting 82, wherein the angle of the core tube tip 83 is 15°-65°, such as 20°, 30°, 40°, 50°, 60°; the effective length of the core tube fitting 82 is 550mm-650mm.

[0056] like Fig.12 As shown, in another preferred embodiment of the present invention, the tip of the core tube 83

[0057] A special-shaped portion 831 is formed on the upper surface, wherein the special-shaped portion 831 includes an arc shape to facilitate the puncture operation; preferably, it can be seen Fig.16 , two typical forms of special-shaped parts are listed from top to bottom, including the aforementioned arc (the second form). Specifically, from top to bottom, the first form is a common flat blade, the second form is a segmented blade, and the third form is a serrated blade. When in use, compared with the first form, the second form of the blade (i.e., the arc-shaped special-shaped part 831) adopts a segmented angle design to make the blade tip angle smaller, which can enhance the puncture force while ensuring that the overall angle remains unchanged. The third form of the blade adopts a serrated blade, which can reduce the puncture contact surface and increase the puncture force utilization rate.

[0058] Specifically, when in use, the core needle 7 or the core tube 8 can be switched to avoid the increase in operation time caused by replacing the puncture tube or puncture needle and the risk of infection caused by replacing the sheath.

[0059] The puncture device of the utility model has two sets of puncture mechanisms, a puncture tube and a puncture needle, which reduces the cost of purchase and use; when in use, it avoids the increase in operation time caused by replacing the puncture tube or the puncture needle and the risk of infection caused by replacing the sheath; the hardened sleeve of the utility model has a bending part, which is convenient for adjusting the angle and reduces the risk of breakage during use. The basic principles, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited to the above-mentioned embodiments. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall within the scope of protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A transcervical puncture device, characterized in that: The invention comprises a first dilator (1), a second dilator (2), a catheter sheath (3), a first catheter (4) and a hardened sleeve (5), wherein the first dilator (1) or the second dilator (2) is installed in the catheter sheath (3); the first catheter (4) is installed in the catheter sheath (3); the hardened sleeve (5) is inserted into the first catheter (4), wherein a core needle (7) or a core tube (8) is installed in the hardened sleeve (5).

2. A transcervical puncture device according to claim 1, characterized in that: The core needle (7) is installed in the hardened sleeve (5) through the second catheter (6).

3. A transcervical puncture device according to claim 1 or 2, characterized in that: The first expander (1) comprises a first expander connector (11) connected to the end of the first expander tube (12) of the first expander (1), a first expander tip portion (13) formed integrally with the first expander tube (12), and a first expander pore portion (14) arranged inside the first expander (1); the effective length of the first expander (1) is 150 mm-250 mm; the second expander (2) comprises a second expander connector (21) connected to the end of the second expander tube (22) of the second expander (2), a second expander tip portion (23) formed integrally with the second expander tube (22), and a second expander pore portion (24) arranged inside the second expander (2); the effective length of the second expander (2) is 500 mm-600 mm.

4. A transcervical puncture device according to claim 1 or 2, characterized in that: The catheter sheath (3) comprises: A catheter sheath connector (31) connected to the end of the catheter sheath tube (32) of the catheter sheath (3); a catheter sheath tip (33) formed integrally with the catheter sheath tube (32) and having a catheter sheath pore (34) disposed therein; A three-way valve (35) connected to the catheter sheath connector (31); The developing ring (36) is arranged on the catheter sheath tube (32); the catheter sheath tube (32) comprises an inner layer (321), a middle layer (322) and an outer layer (323) from the inside to the outside, wherein the inner layer (321) is made of PTFE, the middle layer (322) is made of stainless steel, and the outer layer (323) is made of PEBAX; the effective length of the catheter sheath (3) is 400mm-500mm.

5. A transcervical puncture device according to claim 1 or 2, characterized in that: The first conduit (4) comprises a first conduit connector (41) connected to the end of a first conduit pipe (42) of the first conduit (4), and a first conduit tip portion (43) formed integrally with the first conduit (4) and provided with a first conduit aperture portion (44) therein; the effective length of the first conduit (4) is 500 mm-560 mm.

6. A transcervical puncture device according to claim 1 or 2, characterized in that: The hardened sleeve (5) comprises a hardened sleeve connector (51) connected to the end of a hardened sleeve first pipe member (52) of the hardened sleeve (5), wherein the hardened sleeve first pipe member (52) is integrally connected to a hardened sleeve second pipe member (521); a hardened sleeve tip portion (53) integrally formed with the hardened sleeve second pipe member (521), wherein a hardened sleeve pore portion (54) is provided inside the hardened sleeve tip portion (53); a hardened sleeve bending portion (522) is formed by bending between the hardened sleeve first pipe member (52) and the hardened sleeve second pipe member (521), wherein the sum of the effective lengths of the hardened sleeve first pipe member (52) and the hardened sleeve second pipe member (521) is 500 mm-560 mm.

7. A transcervical puncture device according to claim 2, characterized in that: The second conduit (6) comprises a second conduit connector (61) connected to the end of the second conduit pipe (62) of the second conduit (6), a second conduit tip portion (63) formed integrally with the second conduit pipe (62), and a second conduit pore portion (64) disposed inside the second conduit pipe (62); the effective length of the second conduit pipe (62) is 550 mm-660 mm.

8. A transcervical puncture device according to claim 1 or 2, characterized in that: The core needle (7) comprises a core needle connector (71) and a core needle body (72) connected thereto, wherein the end of the core needle body (72) is provided with a core needle tip portion (73) integrally formed therewith; the angle of the core needle tip portion (73) is 15°-65°; and the effective length of the core needle body (72) is 600mm-700mm.

9. A transcervical puncture device according to claim 1 or 2, characterized in that: The core-through tube (8) comprises a core-through tube connector (81) connected to a core-through tube fitting (82) of the core-through tube (8); a core-through tube tip (83) formed integrally with the core-through tube fitting (82), wherein the angle of the core-through tube tip (83) is 15°-65°; and the effective length of the core-through tube fitting (82) is 550 mm-650 mm.

10. A transcervical puncture device according to claim 9, characterized in that: A special-shaped portion (831) is formed on the tip end (83) of the core-through tube, wherein the special-shaped portion (831) includes an arc shape.

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