CN218852782U

CN218852782U - Liver puncture needle

Info

Publication number: CN218852782U
Application number: CN202220749870.9U
Authority: CN
Inventors: 姜大为; 郭欢欢
Original assignee: Orbusneich Medical Shenzhen Co ltd
Current assignee: Orbusneich Medical Shenzhen Co ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2023-04-14
Anticipated expiration: 2032-04-02

Abstract

The utility model discloses a liver puncture needle, which aims to solve the technical problem of reducing the operation risk of treating portal hypertension. The utility model adopts the following technical scheme: a liver puncture needle is provided with a needle core, wherein the most distal end of the needle core is a tip, and the diameter of the tip is smaller than that of the needle core. Compared with the prior art, the utility model, the most advanced diameter of liver pjncture needle is less than the diameter of nook closing member, can reduce the wound that probably arouses portal vein in the liver puncture at the puncture in-process, reduces the operation risk of treatment portal vein hypertension.

Description

Liver puncture needle

Technical Field

The utility model relates to a medical appliance, in particular to a puncture needle for the auxiliary treatment of portal hypertension.

Background

The liver puncture needle is used for puncturing the liver from the internal jugular vein to the portal vein branch through the hepatic vein when treating portal hypertension, the corresponding guide wire is conveyed to the portal vein part by the independent space of the needle sleeve, the implantation of the expandable metal bracket is assisted, and the shunt channel between the internal hepatic vein and the inferior vena cava is established, so that the pressure of the whole external hepatic portal vein system area is obviously reduced, and the treatment and the prevention of the portal hypertension are achieved. As shown in figures 1 and 2, the liver puncture needle of the prior art is provided with a needle core, a needle sleeve and a needle seat, the diameter of the tip of the needle core is consistent with that of the main part of the needle core, namely the diameter from the back part of the tip of the needle core to the needle seat is the same, the needle core enters from the internal jugular vein along with the needle sleeve and then enters into the portal vein together with hepatic vein puncture to establish an artificial shunt channel. In the process of portal vein puncture, because portal veins of patients are different and experience of doctors is different, the tip of the needle core during puncture possibly penetrates through the portal vein blood vessel to cause trauma, and the portal vein hypertension is treated to cause operation risk.

Disclosure of Invention

The utility model aims at providing a liver puncture needle, the technical problem that solve is to reduce the operation risk of treating portal hypertension.

The utility model adopts the following technical scheme: a liver puncture needle is provided with a needle core, wherein the most distal end of the needle core is a tip, and the diameter of the tip is smaller than that of the needle core.

The utility model discloses a pointed end is less than for a section diameter the filiform of nook closing member diameter, its distal end is conical, and the summit of cone is at the distal end portion.

The diameter of the needle core of the utility model is 0.9mm.

The diameter of the tip of the utility model is 0.4-0.6 mm.

The diameter of the tip of the utility model is 0.6mm.

The utility model discloses most advanced length is 5mm.

The conical height of the utility model is 1.8mm.

The utility model discloses the spring housing has been put to the distal end overcoat of nook closing member, and the spring housing forms cylindricly by the coiling of spring silk, and cylindric axis is coaxial with the nook closing member, and the near-end cover that the spring housing next-door neighbour is most advanced is put on the nook closing member.

The utility model discloses a spring housing adopts the wire footpath to constitute for 0.15 mm's spring silk coiling, and the spring housing internal diameter is 0.6mm, long 90mm, and the pitch is 0.15mm.

The utility model discloses a spring housing adopts the silk footpath to constitute for 0.15 mm's spring wire coiling, and the spring housing internal diameter is 0.6mm, long 90mm, inseparable coiling.

Compared with the prior art, the utility model, the most advanced diameter of liver pjncture needle is less than the diameter of nook closing member, can reduce the wound that probably arouses portal vein in the liver puncture at the puncture in-process, reduces patient's misery and operation risk.

Drawings

Fig. 1 is a schematic diagram of a prior art structure.

Fig. 2 is an enlarged view of a portion I of fig. 1.

Fig. 3 is a schematic structural diagram of the present invention.

Fig. 4 is a schematic view of the structure of the needle guard.

Figure 5 is a combination view of the needle and hub.

Fig. 6 is a schematic structural view of the tip of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in figure 3, the liver puncture needle of the utility model is provided with a needle core 2, the near end of the needle core 2 is inserted and connected in the needle base 1 and forms a fixed connection with the needle base 1, and the far end of the needle core 2 is a tip 4. The spring sleeve 3 is sleeved outside the far end of the needle core 2, the spring sleeve 3 is a spiral spring and is wound by a spring wire to form a cylinder shape, the axis of the cylinder-shaped spring sleeve 3 is coaxial with the needle core 2, and the near end of the spring sleeve 3 close to the tip end 4 is sleeved on the needle core 2.

The needle core 2 has a diameter of 0.9mm and a length of 620mm.

As shown in fig. 6, the tip 4 is a wire having a diameter smaller than that of the core 2, and has a conical distal end with the apex of the cone at the distal end. The tip 4 has a length of 5mm and a diameter of 0.4 to 0.6mm. The axial length of the cone (height of the cone) is 1.8mm.

The spring sleeve 3 is formed by winding a spring wire with the wire diameter of 0.15mm, the inner diameter of the spring sleeve 3 is 0.6mm, the length of the spring sleeve is 90mm, and the thread pitch of the spring sleeve is 0.15mm or the spring sleeve is wound tightly.

The needle seat 1 is combined with the needle core 2 and used for transmitting thrust during liver puncture. The needle core 2 and the tip 4 are used to puncture the liver. The spring sleeve 3 is used for enhancing the strength and flexibility of the distal end of the needle core 2 and is matched with the needle core 2 and the sharp end 4 to puncture the liver.

In a preferred embodiment, the tip 4 is 0.6mm in diameter and 5mm in length.

As shown in fig. 4 and 5, when treating portal hypertension, the needle core 2 of the liver puncture needle of the present invention is placed in the needle sheath 5, the liver puncture needle and the needle sheath 5 pass through the luer combination 6, the needle core 2 enters from the internal jugular vein along with the needle sheath 5, and then enters into the portal vein vessel from the liver vein puncture, and then exits from the liver puncture needle, the needle sheath 5 is retained in the portal vein, and then enters into the portal vein from the external guide wire, and a manual channel is expanded by using the balloon.

The utility model discloses a sharp-pointed 4 diameters are less than the diameter of 2 trunks of nook closing member, can not lead to the puncture effect to receive the influence because of sharp-pointed 4 thinnings. The puncture needle of the prior art has a diameter of 0.9mm, and during the liver puncture process, the spatial relationship between the hepatic vein and the portal vein is complex, and the spatial relationship can be changed due to anatomical variation and pathological change of liver cirrhosis, so that the portal vein puncture is difficult to locate, and doctors have different experiences, so that the portal vein branch is generally penetrated, and a plurality of needles are punctured in the whole puncture process. Adopt the utility model discloses a liver pjncture needle that 2 trunk diameters of nook closing member are less than to most advanced 4 diameters can reduce the wound to the portal vein at the puncture in-process. After the puncture is completed, the liver puncture needle is withdrawn from the needle sleeve 5, and then a 0.18-inch guide wire is inserted into the portal vein branch for assisting the subsequent balloon dilatation artificial channel.

The utility model discloses a liver pjncture needle, sharp-end 4 diameters are less than 2 trunk diameters of nook closing member, can reduce in the operation of treatment portal hypertension, and the wound that causes the patient under the condition of puncture many times reduces the operation risk, reduces the complication, increases the success rate of performing the operation.

Claims

1. A liver puncture needle is provided with a needle core (2), and is characterized in that: the most distal end of the needle core (2) is a tip (4), and the diameter of the tip (4) is smaller than that of the needle core (2).

2. A liver puncture needle according to claim 1, characterized in that: the tip (4) is a section of thread with a diameter smaller than that of the needle core (2), the distal end of the tip is conical, and the vertex of the cone is at the distal end.

3. A liver puncture needle according to claim 2, characterized in that: the diameter of the needle core (2) is 0.9mm.

4. A liver puncture needle according to claim 3, wherein: the diameter of the tip (4) is 0.4-0.6 mm.

5. A liver puncture needle according to claim 4, wherein: the diameter of the tip (4) is 0.6mm.

6. A liver puncture needle according to claim 5, wherein: the length of the tip (4) is 5mm.

7. A liver puncture needle according to claim 6, characterized in that: the height of the cone is 1.8mm.

8. A liver puncture needle according to claim 7, wherein: the spring sleeve (3) is sleeved outside the far end of the needle core (2), the spring sleeve (3) is wound by spring wires to form a cylinder shape, the axis of the cylinder shape is coaxial with the needle core (2), and the near end of the spring sleeve (3) close to the tip end (4) is sleeved on the needle core (2).

9. A liver puncture needle according to claim 8, characterized in that: the spring sleeve (3) is formed by winding a spring wire with the wire diameter of 0.15mm, the inner diameter of the spring sleeve (3) is 0.6mm, the length of the spring sleeve is 90mm, and the thread pitch of the spring sleeve is 0.15mm.

10. A liver puncture needle according to claim 8, wherein: the spring sleeve (3) is formed by winding a spring wire with the wire diameter of 0.15mm, and the spring sleeve (3) is tightly wound with the inner diameter of 0.6mm and the length of 90 mm.