Puncture needle

Abstract

The utility model provides a puncture needle, which comprises a needle body front section and a needle body rear section, the included angle between the needle body front section and the needle body rear section is 110-170 degrees, the end part of the needle body front section is a blade, the end part of the needle body rear section is a drainage tube connecting part, and the puncture needle is characterized in that the cross section of the needle body between the blade and the drainage tube connecting part is elliptical; and the cutting edge and the long axis of the ellipse are positioned on the symmetric plane of the puncture needle. The puncture needle has the advantages that due to the adoption of the technical scheme, the resistance is smaller when the puncture needle penetrates through the skin, the size of an incision can be reduced, operation of an operator is facilitated, and later-stage incision healing is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely is a kind of puncture needle applied to catheterization operation in negative pressure drainage tube. BACKGROUND

[0002] Negative pressure drainage device is a kind of medical instrument widely used in medical field, mainly used for postoperative or post-traumatic drainage, to help patients to remove the secretion such as blood, body fluid, pus in body, to reduce the risk of infection, promote wound healing.

[0003] Taking the negative pressure drainage device used after abdominal operation as an example, its components usually include puncture needle and drainage tube, one end of puncture needle is blade, and the other end is connected with the end of drainage tube. When catheterization, puncture needle is inserted into abdominal cavity from abdominal operation incision, the blade of puncture needle pierces abdominal cavity at one side of incision, and the end of drainage tube is led out, the puncture needle and drainage tube are separated, the end of drainage tube outside is connected with negative pressure device, so as to realize drainage.

[0004] The needle body of puncture needle in prior art is usually rod-shaped structure with certain bending angle, the cross section of puncture needle main body is circular, the incision formed by the blade of puncture needle penetrating abdominal cavity is in the shape of a Chinese character, and muscle tissue and skin have strong clamping force on puncture needle, which results in large resistance of puncture needle in the process of leading out abdominal cavity, especially when puncture needle or operator's hand is stained with wound mucus, blood, fat and other liquids, operator is not easy to exert force on puncture needle, thereby increasing the operation difficulty of puncture process. INVENTION CONTENTS

[0005] The utility model aims at providing a kind of puncture needle with flat needle body, which is especially suitable for catheterization operation in negative pressure drainage.

[0006] The technical scheme of the utility model is:

[0007] A puncture needle, comprising needle body front section and needle body rear section, the included angle between needle body front section and needle body rear section is 110-170 °, the end of needle body front section is blade, the end of needle body rear section is drainage tube connecting part, the cross section of needle body between blade and drainage tube connecting part is oval, and the long axis of blade and oval is located on the symmetry plane of puncture needle.

[0008] The needle body of puncture needle is set to flat in the utility model, which is used to match the incision in the shape of a Chinese character formed by blade on skin, can effectively reduce the resistance of needle body when passing through incision, and facilitate the puncture operation of puncture needle.

[0009] When used, the end of drainage tube is sleeved on drainage tube connecting part, and the two are interference fit. Therefore, the end cross section of needle body rear section is set to circular for matching drainage tube, and the flat needle body part and cylindrical needle body rear section end part are smoothly transitioned.

[0010] Furthermore, the surface of the puncture needle body is provided with a raised ridge along the direction from the blade to the connection of the drainage tube.

[0011] The purpose of the raised ridge is to reduce the contact area between the needle surface and the skin, muscles and other tissues on both sides of the incision, thereby further reducing the resistance of needle insertion.

[0012] The needle body has two clamping holes symmetrically arranged on both sides of the front section.

[0013] The clamping hole is designed to fit a pug gripper. After the tip of the puncture needle protrudes from the skin, the pug gripper can pull the entire puncture needle out of the skin, effectively solving the problem that the puncture needle is difficult for the operator to grasp with their fingers after it has been contaminated with wound mucus, blood, fat, or other fluids.

[0014] The advantages and positive effects of this utility model are: due to the adoption of the above technical solution, the resistance when the puncture needle passes through the skin is smaller, which can reduce the size of the incision, facilitate the operator's operation, and facilitate the later incision healing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structural principle of this utility model.

[0016] Figure 2 This is a top view of the present invention.

[0017] Figure 3 yes Figure 2 Cross-sectional view at point AA

[0018] In the picture:

[0019] 1. Front section of needle body 2. Rear section of needle body 3. Ridge 11. Blade 12. Clamping hole 21. Drainage tube connection Detailed Implementation

[0020] like Figures 1-3 As shown, this utility model:

[0021] A puncture needle includes a front section 1 and a rear section 2, with an included angle of 110-170° between the front and rear sections. The end of the front section is a blade 11, and the end of the rear section is a drainage tube connection 21. The cross-section of the needle body between the blade and the drainage tube connection is elliptical, and the blade and the major axis of the ellipse are located on the plane of symmetry of the puncture needle.

[0022] The surface of the puncture needle is provided with a raised ridge 3 along the direction from the blade to the connection of the drainage tube.

[0023] The needle body has two clamping holes 12 symmetrically arranged on both sides of the front section.

[0024] The working process of this example:

[0025] During the production of the product, the drainage tube is sleeved on the drainage tube connecting part of the puncture needle, and the blade of the puncture needle is provided with a protective sleeve. During the catheterization operation, the protective sleeve of the puncture needle is removed, the puncture needle is inserted into the body cavity of a person, such as an abdominal cavity, from a surgical incision, the blade of the puncture needle is used to pierce the muscle skin and other tissues on one side of the surgical incision, the puncture needle is led out, and the drainage tube is penetrated through the skin. Due to the flat needle body and the convex rib, the resistance of the puncture needle in the process of penetrating through the muscle skin and other tissues is greatly reduced. After the blade of the puncture needle penetrates out of the muscle skin and other tissues, the whole puncture needle can be pulled out by using the ferret forceps to clamp the clamping hole.

[0026] The above describes one embodiment of the present application in detail, but the content described is only a preferred embodiment of the present application, and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made within the scope of the present application should still belong to the patent coverage of the present application.

Claims

1. A puncture needle comprising a front needle body section and a rear needle body section, the front needle body section and the rear needle body section being angled at 110-170° to each other, the end of the front needle body section being a blade, and the end of the rear needle body section being a drainage tube connection part, characterized in that: The cross section of the needle body between the blade and the drainage tube connecting part is elliptical, and the long axis of the ellipse is located on the symmetry plane of the puncture needle.

2. The puncture needle of claim 1, wherein: The surface of the needle body of the puncture needle is provided with a convex rib in the direction from the blade to the drainage tube connecting part.

3. The puncture needle of claim 1, wherein: Two clamping holes are symmetrically arranged on both sides of the front section of the needle body.

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