Liver-intravascular ultrasound puncture device

Abstract

The utility model relates to the technical field of medical devices, and provides a liver intravascular ultrasonic puncture device. It comprises: a catheter, a puncture needle channel and a traction wire channel are arranged in the catheter, a traction wire is arranged in the traction wire channel, one end of the traction wire is fixed at the beginning of the traction wire channel, and the other end of the traction wire extends to the outside of the catheter toward the end of the traction wire channel; a puncture needle is inserted into the puncture needle channel; an ultrasonic transducer is arranged at the insertion end of the catheter, and the terminal axis of the puncture needle channel forms a fixed angle with the horizontal axis of the puncture needle channel. The beneficial effect is that the device arranges an ultrasonic transducer at the end of the catheter to realize the visualization of the puncture, and can synchronously adjust the curvature of the puncture needle and the ultrasonic probe, accurately align the puncture needle with the target blood vessel to be punctured, and avoid the risk of blind puncture, which is suitable for accurate puncture from the hepatic vein to the portal vein in transjugular intrahepatic portosystemic shunt surgery, as well as the puncture of masses and organs around adjacent blood vessels in clinical practice.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, and in particular to a liver-intravascular ultrasonic puncture device. Background Art

[0002] The liver is the synthesis factory of the human body, and the portal vein is responsible for transporting nutrients to the liver. The liver structure and function of patients with liver cirrhosis change, resulting in increased portal vein pressure, which in turn affects the gastric coronary vein, splenic vein, and superior mesenteric vein. As the pressure gradually increases, esophageal gastric varices are formed and rupture and bleed, endangering the patient's life. Transjugular intrahepatic portosystemic shunt (TIPS) is an important means of treating portal hypertension in liver cirrhosis. The most critical link of this technology is to achieve intrahepatic portal vein puncture. At present, indirect portal vein angiography is often used in clinical practice to understand the anatomical relationship between the portal vein and the hepatic vein before performing portal vein puncture. To a large extent, it depends on the operator's experience to perform "blind puncture", which is technically difficult and risky, limiting the clinical application of this technology. In view of this, the present utility model is proposed. Utility Model Content

[0003] The utility model aims to provide a liver-intravascular ultrasonic puncture device to solve the technical problems existing in the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a liver-intravascular ultrasonic puncture device, comprising: a catheter, in which a puncture needle channel and a traction wire channel are arranged, a traction wire is arranged in the traction wire channel, one end of the traction wire is fixed at the starting end of the traction wire channel, and the other end of the traction wire extends to the end of the traction wire channel to the outside of the catheter; a puncture needle is inserted in the puncture needle channel; an ultrasonic transducer is arranged at the insertion end of the catheter, and the terminal axis of the puncture needle channel forms a fixed angle with the horizontal axis of the puncture needle channel; under the action of the traction wire, the ultrasonic transducer and the puncture needle swing synchronously to adjust the angle.

[0005] In an optional embodiment, a plurality of grooves are evenly arranged on the catheter near the insertion end, and each of the grooves extends in the direction of the puncture needle channel and covers the traction wire channel to a depth.

[0006] In an optional embodiment, the end of the puncture needle is a puncture needle head, and a through guide wire channel is provided inside the puncture needle along its central axis.

[0007] In an optional embodiment, a fixed angle between a terminal axis of the puncture needle channel and a horizontal axis of the puncture needle channel is not less than 45°.

[0008] In an optional embodiment, the outer diameter of the catheter does not exceed 5 mm.

[0009] The beneficial effects of the utility model are as follows: the device is provided with an ultrasonic transducer at the end of the catheter to realize visualization of puncture, and can simultaneously adjust the curvature of the puncture needle and the ultrasonic probe, accurately align the puncture needle with the target blood vessel to be punctured, and avoid the risk of blind puncture. It is suitable for precise puncture from the hepatic vein to the portal vein in transjugular intrahepatic portosystemic shunt surgery, as well as the puncture of masses and organs around adjacent blood vessels in clinical practice. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 The structure of the liver-intravascular ultrasound puncture device provided in one embodiment of the utility model is schematically shown. Figure 1 .

[0012] Figure 2 The structure of the liver-intravascular ultrasound puncture device provided in one embodiment of the utility model is schematically shown. Figure 2 .

[0013] Figure 3 It is a top view of the liver-intravascular ultrasonic puncture device provided in one embodiment of the utility model.

[0014] Figure 4 for Figure 3 AA section view.

[0015] Among them, the figures are marked as: 1-catheter, 11-puncture needle channel, 12-traction wire channel, 13-groove; 2-puncture needle, 21-guide wire channel, 22-puncture needle; 3-ultrasonic transducer; 4-traction wire. DETAILED DESCRIPTION

[0016] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0017] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly or indirectly located on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on the present technical solution. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0018] Please refer to the attached Figure 1-4 The purpose of this embodiment is to provide a liver-intravascular ultrasound puncture device, including: a catheter 1. It should be noted that the outer diameter of the catheter 1 does not exceed 5 mm. The catheter 1 is provided with a puncture needle channel 11 and a traction wire channel 12. The traction wire channel 12 is provided with a traction wire 4. One end of the traction wire 4 is fixed at the beginning of the traction wire channel 12, and the other end of the traction wire 4 extends to the end of the traction wire channel 12 to the outside of the catheter 1; the puncture needle channel 11 is penetrated by a puncture needle 2, and the end of the puncture needle 2 is a puncture needle head 22. The interior of the puncture needle 2 is provided with a through guide wire channel 21 along its central axis.

[0019] In this embodiment, an ultrasonic transducer 3 is provided at the insertion end of the catheter 1, and the terminal axis of the puncture needle channel 11 forms a fixed angle with the horizontal axis of the puncture needle channel 11. Preferably, the fixed angle between the terminal axis of the puncture needle channel 11 and the horizontal axis of the puncture needle channel 11 is not less than 45°; under the action of the traction wire 4, the ultrasonic transducer 3 and the puncture needle 2 swing synchronously to adjust the angle, that is, adjust the curvature of the insertion end of the catheter 1.

[0020] It should be noted that the catheter 1 is evenly provided with a plurality of grooves 13 near the insertion end, and the number of the grooves 13 is greater than 10, so that the catheter 1 can be fully bent when pulling the traction wire 4. Each groove 13 extends toward the puncture needle channel 11 and covers the traction wire channel 12 in depth.

[0021] During the operation, the doctor inserts the catheter 1 through the internal jugular vein along the blood vessel to the vicinity of the opening of the hepatic vein through the right side of the patient's neck, and then inserts the puncture needle 2 through the catheter 1. Before the puncture needle 2 is completely out (the puncture needle 2 can partially pass through the catheter 1), the ultrasonic transducer 3 is used to observe the required puncture position (portal vein), and the puncture needle 2 is aligned with the puncture position with the help of the ultrasonic transducer 3. This process requires the traction wire 4 to work, so that the insertion end of the catheter 1 is bent along one side of the groove 13, and the positions of the ultrasonic transducer 3 and the puncture needle 2 are adjusted synchronously to complete the alignment of the puncture needle 2 with the required puncture position, and then the guide wire is inserted into the guide wire channel 21 of the puncture needle 2 to complete the subsequent operation, which will not be repeated.

[0022] Any modifications, equivalent substitutions and improvements made within the spirit and principles of this utility model should be included in the protection scope of this utility model.

Claims

1. A liver-intravascular ultrasonic puncture device, comprising: A catheter (1), wherein a puncture needle channel (11) and a traction wire channel (12) are provided in the catheter (1), a traction wire (4) is provided in the traction wire channel (12), one end of the traction wire (4) is fixed at the beginning of the traction wire channel (12), and the other end of the traction wire (4) extends to the end of the traction wire channel (12) to the outside of the catheter (1); a puncture needle (2) is inserted into the puncture needle channel (11); The invention is characterized in that: an ultrasonic transducer (3) is provided at the insertion end of the catheter (1), and the terminal axis of the puncture needle channel (11) forms a fixed angle with the horizontal axis of the puncture needle channel (11); under the action of the traction wire (4), the ultrasonic transducer (3) and the puncture needle (2) swing synchronously to adjust the angle.

2. The liver intravascular ultrasound puncture device according to claim 1, characterized in that: A plurality of grooves (13) are evenly arranged on the catheter (1) near the insertion end, and each groove (13) extends in the direction of the puncture needle channel (11) and covers the depth of the traction wire channel (12).

3. The liver intravascular ultrasound puncture device according to claim 1, characterized in that: The end of the puncture needle (2) is a puncture needle head (22), and a through guide wire channel (21) is arranged inside the puncture needle (2) along its central axis.

4. The liver intravascular ultrasound puncture device according to claim 1, characterized in that: The fixed angle between the terminal axis of the puncture needle channel (11) and the horizontal axis of the puncture needle channel (11) is not less than 45°.

5. The liver intravascular ultrasound puncture device according to claim 1, characterized in that: The outer diameter of the catheter (1) does not exceed 5 mm.

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