CN220988877U - Blood vessel puncture needle - Google Patents

Abstract

The utility model discloses a blood vessel puncture needle, which comprises a needle cylinder, a trocar and a Y-shaped needle tube, wherein an outer trocar is fixedly arranged at the lower end of the needle cylinder, a fixing structure capable of fixing the trocar is arranged in the needle cylinder, the fixing structure comprises a screw cap, an external thread matched with the screw cap is arranged on the surface of the needle cylinder, a conical groove is formed in the inner wall of the needle cylinder, a conical spring clamping sleeve is arranged on the inner wall of the conical groove, and the inner diameter of the conical spring clamping sleeve is matched with the outer diameter of the trocar. This blood vessel pjncture needle through setting up cylinder, trocar and overcoat needle, puts the trocar in the overcoat needle to utilize fixed knot to construct and fix the trocar in the cylinder, when the overcoat needle pierces the blood vessel, unscrew the nut and drive the trocar and break away from the centre gripping that the conical spring pressed from both sides the cover next, the trocar can slide in the through-hole this moment, later send into the blood vessel with the trocar along the through-hole, avoided traditional blood vessel pjncture needle core entering blood vessel and the trocar still be the problem outside the blood vessel.

Description

A vascular puncture needle

Technical Field

The utility model belongs to the technical field of medical devices, and in particular relates to a blood vessel puncture needle.

Background technique

At present, when performing clinical target blood vessel puncture, it is often the case that the puncture needle cannot be accurately placed in the blood vessel, especially during arterial puncture and small vein puncture, the blood vessel is punctured, but the catheterization fails. The main reason is that in order to effectively puncture the tissue, the current puncture needle design has a certain distance between the front end of the needle core and the cannula needle, resulting in the cannula needle not entering the blood vessel when the needle core punctures the blood vessel during the puncture process. At this time, when the cannula needle is sent, it cannot accurately enter the blood vessel. For this reason, we propose a vascular puncture needle.

Utility Model Content

The utility model aims to provide a blood vessel puncture needle to solve the technical problems raised in the background technology.

To achieve the above-mentioned purpose, the specific technical scheme of the utility model is as follows: a vascular puncture needle, comprising a syringe, a trocar and a Y-shaped needle tube, the lower end of the syringe is fixedly installed with an outer sleeve needle, the interior of the syringe is provided with a fixing structure that can fix the trocar, the fixing structure comprises a nut, the surface of the syringe is provided with an external thread that matches the nut, the inner wall of the syringe is provided with a conical groove, the inner wall of the conical groove is provided with a conical spring jacket, and the inner diameter of the conical spring jacket is adapted to the outer diameter of the trocar.

Preferably, a through hole communicating with the interior of the syringe is formed at the lower end of the outer sleeve needle.

Preferably, a water-absorbing cotton ring is fixedly mounted on the inner wall of the syringe, and a handle is fixedly mounted on the surface of the syringe, and the water-absorbing cotton ring, handle, syringe, conical spring jacket and outer needle are all configured in a two-petal shape.

Preferably, the inner diameters of the absorbent cotton ring and the through hole are both matched with the outer diameter of the trocar, a block is fixedly mounted on the surface of one handle, and a buckle matched with the block is provided on the surface of the other handle.

Preferably, the lower end of the Y-shaped needle tube is fixedly connected to the upper end of the trocar, and the interior of the Y-shaped needle tube and the trocar are interconnected.

Preferably, a slope groove is provided at the lower end of the outer sleeve needle.

The utility model of a vascular puncture needle has the following advantages:

1. The vascular puncture needle is provided with a syringe, a trocar and an outer needle. The trocar is placed in the outer needle and fixed in the syringe by a fixing structure. When the outer needle punctures the blood vessel, the nut is then loosened to drive the trocar out of the clamping of the conical spring clip. At this time, the trocar can slide in the through hole, and then the trocar is sent into the blood vessel along the through hole, avoiding the problem of the needle core entering the blood vessel while the trocar is still outside the blood vessel during traditional blood vessel puncture.

2. This kind of vascular puncture needle is provided with a Y-shaped needle tube. When the cannula needle is inserted into the blood vessel, the outer needle can be withdrawn from the patient's skin, and then the nut can be screwed out, and the block can be separated from the buckle, so that the syringe, the outer needle, the conical spring jacket and the absorbent cotton ring can be separated, and then the syringe, the outer needle, the conical spring jacket and the absorbent cotton ring can be driven out of the cannula needle, thereby facilitating the disposal of the syringe and the outer needle after the puncture is completed.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of the three-dimensional structure of the utility model;

FIG2 is a schematic diagram of the front cross-sectional structure of the syringe of the present invention;

FIG3 is a schematic diagram of the rear cross-sectional structure of the syringe of the present invention.

Markings in the figure: 1 syringe, 2 trocar, 3 Y-type needle tube, 4 outer needle, 5 nut, 6 conical spring jacket, 7 absorbent cotton ring, 8 handle, 9 clamp block, 10 buckle.

Detailed ways

In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying 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 embodiments of the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and/or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and/or settings discussed.

In order to better understand the purpose, structure and function of the utility model, the following is a further detailed description of a vascular puncture needle of the utility model in conjunction with the accompanying drawings.

As shown in Figures 1-3, a vascular puncture needle of the utility model comprises a syringe 1, a trocar 2 and a Y-shaped needle tube 3. The lower end of the Y-shaped needle tube 3 is fixedly connected to the upper end of the trocar 2, and the Y-shaped needle tube 3 is interconnected with the interior of the trocar 2. An outer sleeve needle 4 is fixedly installed on the lower end of the syringe 1. A slope groove is provided at the lower end of the outer sleeve needle 4. The slope groove is provided to facilitate the outer sleeve needle 4 to pierce the skin. A through hole is provided at the lower end of the outer sleeve needle 4 that is interconnected with the interior of the syringe 1. A water-absorbing cotton ring 7 is fixedly installed on the inner wall of the syringe 1, and a handle 8 is fixedly installed on the surface of the syringe 1.

The interior of the syringe 1 is provided with a fixing structure for fixing the trocar 2, the fixing structure includes a nut 5, the surface of the syringe 1 is provided with an external thread matched with the nut 5, the inner wall of the syringe 1 is provided with a conical groove, the inner wall of the conical groove is provided with a conical spring jacket 6, and the inner diameter of the conical spring jacket 6 is matched with the outer diameter of the trocar 2.

The trocar 2 is passed through the conical spring collet 6 and the syringe 1, and the trocar 2 is placed in the through hole, and then the nut 5 is tightened. At this time, the conical spring collet 6 will contact the conical groove, and the conical spring collet 6 will shrink to clamp the trocar 2, so that the trocar 2 can be fixed in the syringe 1.

The absorbent cotton ring 7, handle 8, syringe 1, conical spring jacket 6 and outer needle 4 are all arranged in a two-petal shape, and the inner diameters of the absorbent cotton ring 7 and the through hole are adapted to the outer diameter of the trocar 2. A clamping block 9 is fixedly installed on the surface of one petal of the handle 8, and a buckle 10 adapted to the clamping block 9 is provided on the surface of the other petal of the handle 8. The two-petal absorbent cotton ring 7, handle 8, syringe 1, conical spring jacket 6 and outer needle 4 are combined, and then the clamping block 9 is inserted into the buckle 10, so that the absorbent cotton ring 7, handle 8, syringe 1, conical spring jacket 6 and outer needle 4 can be assembled as a whole.

After the cannula needle 2 is fixed in the syringe 1, the syringe 1 is pushed to drive the outer needle 4 to puncture the patient's blood vessel. After the blood returns from the cannula needle 2, the nut 5 is loosened to drive the conical spring jacket 6 to open, forcing the cannula needle 2 to break away from the clamping of the conical spring jacket 6. At this time, the cannula needle 2 can slide in the through hole, and then the cannula needle 2 is sent into the blood vessel along the through hole, avoiding the problem of the needle core entering the blood vessel while the cannula needle 2 is still outside the blood vessel during traditional blood vessel puncture.

After the cannula needle 2 is inserted into the blood vessel, the outer needle 4 can be withdrawn from the patient's skin, and then the nut 5 can be screwed out, and the block 9 can be separated from the buckle 10, so that the syringe 1, the outer needle 4, the conical spring jacket 6 and the absorbent cotton ring 7 can be separated, and then the syringe 1, the outer needle 4, the conical spring jacket 6 and the absorbent cotton ring 7 can be driven out of the cannula needle 2, thereby facilitating the disposal of the syringe 1 and the outer needle 4 after the puncture is completed.

It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims (6)

1. A vascular puncture needle, comprising a syringe (1), a trocar (2) and a Y-shaped needle tube (3), characterized in that: an outer sleeve needle (4) is fixedly installed at the lower end of the syringe (1), a fixing structure for fixing the trocar (2) is arranged inside the syringe (1), and the fixing structure comprises a nut (5), an external thread matching the nut (5) is provided on the surface of the syringe (1), a conical groove is provided on the inner wall of the syringe (1), a conical spring jacket (6) is provided on the inner wall of the conical groove, and the inner diameter of the conical spring jacket (6) matches the outer diameter of the trocar (2). 2. A blood vessel puncture needle according to claim 1, characterized in that: a through hole communicating with the interior of the syringe (1) is formed at the lower end of the outer needle (4). 3. A vascular puncture needle according to claim 1, characterized in that: a water-absorbing cotton ring (7) is fixedly installed on the inner wall of the syringe (1), and a handle (8) is fixedly installed on the surface of the syringe (1), and the water-absorbing cotton ring (7), the handle (8), the syringe (1), the conical spring jacket (6) and the outer needle (4) are all arranged in a two-petal shape. 4. A vascular puncture needle according to claim 3, characterized in that the inner diameters of the absorbent cotton ring (7) and the through hole are both compatible with the outer diameter of the trocar (2), a block (9) is fixedly mounted on the surface of one handle (8), and a buckle (10) compatible with the block (9) is provided on the surface of the other handle (8). 5. A vascular puncture needle according to claim 1, characterized in that the lower end of the Y-shaped needle tube (3) is fixedly connected to the upper end of the trocar (2), and the interior of the Y-shaped needle tube (3) and the trocar (2) are interconnected. 6. A blood vessel puncture needle according to claim 1, characterized in that a slope groove is provided at the lower end of the outer sleeve needle (4).