CN211432882U

CN211432882U - Improved central venous catheter puncture needle

Info

Publication number: CN211432882U
Application number: CN201922488283.XU
Authority: CN
Inventors: 范文江
Original assignee: First Peoples Hospital of Neijiang
Current assignee: First Peoples Hospital of Neijiang
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-09-08
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses an improved central venous catheter puncture needle, which comprises a puncture needle body, wherein the puncture needle body is hollow, and the rear end of the puncture needle body is fixed on a sliding block; the sliding block is arranged in the cylinder body and can slide back and forth along the cylinder body; the cylinder body is provided with a joint perpendicular to the cylinder body; the side wall of the sliding block is provided with an axial rack, and the side wall of the cylinder is provided with a driving gear meshed with the rack; a rubber inner core is arranged in the sliding block; the puncture needle also comprises a probe, and the probe penetrates through the rubber inner core and the puncture needle body from the rear end of the cylinder body; the puncture needle body is communicated with the joint through a hose. The deep vein puncture needle with the structure ensures the puncture safety through two aspects. Firstly, set up the joint perpendicular with the needle body and regard as the maintenance portion for needle body and clavicle can keep parallel needle insertion to ensure that the pjncture needle can not the slant get into the human body and cause the damage of pleura, artery. The puncture of the puncture needle is carried out after the vein position is punctured by the probe.

Description

Improved central venous catheter puncture needle

Technical Field

The utility model relates to a deep vein puncture needle, in particular to an improved central venous catheter puncture needle.

Background

Patients need to monitor their physiological indicators after anesthesia to avoid accidents. The central venous pressure is an important index to be monitored and is used for evaluating circulating physiological parameters and the quantity of body fluid. The specific operation is to puncture the subclavian vein.

A straight needle in a straight shape is commonly used clinically as a puncture needle for subclavian vein puncture, and a needle cylinder connected with the tail end of the straight needle is added, and the length of the straight needle from the tip of the puncture needle to the tail end of the needle cylinder is more than 15 cm. In the process of puncture, overlong puncture equipment (a puncture needle, a connector and a needle cylinder) is limited by the chest wall and shoulders, the puncture needle cannot be kept parallel to a clavicle in the process of needle insertion, and along with the penetration of the puncture needle, the pleura is extremely easy to be damaged downwards to cause pneumothorax, and the artery is injured by mistake to cause local hematoma and even hematothorax. Seriously endanger the safety of patients, bring great risks to clinical operation, prolong the hospitalization time and cause certain economic loss.

In addition, the deep vein puncture needle is relatively thick and large, so that a large wound can be caused once the deep vein puncture needle is accidentally injured, and the deep vein puncture needle is clinically used after the deep vein puncture needle is used for probing the vein position. However, the operation is complicated, and the position after needle replacement has deviation, so that the possibility of accidental injury still exists.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides an improved central venous catheter puncture needle, which is convenient to hold so that the puncture needle can be parallel to the clavicle during the needle insertion process; meanwhile, after the probe punctures the vein position, the puncture needle can be conveniently driven to enter the vein along the original path of the probe, and the position deviation is avoided.

In order to solve the technical problems, the technical proposal of the utility model is to adopt an improved central venous catheter puncture needle, which comprises a puncture needle body, wherein the puncture needle body is hollow, and the rear end of the puncture needle body is fixed on a slide block; the sliding block is arranged in the cylinder body and can slide back and forth along the cylinder body; the cylinder body is provided with a joint perpendicular to the cylinder body; the side wall of the sliding block is provided with an axial rack, and the side wall of the cylinder is provided with a driving gear meshed with the rack; a rubber inner core is arranged in the sliding block; the puncture needle also comprises a probe, and the probe penetrates through the rubber inner core and the puncture needle body from the rear end of the cylinder body; the puncture needle body is communicated with the joint through a hose. The principle of the utility model is that the fine probe is utilized to puncture the position of the vein firstly, and then the puncture needle is inserted according to the needle inserting path of the probe, thereby avoiding the position deviation. Meanwhile, the position of the connector is perpendicular to the puncture needle body, so that the connector is convenient to maintain, and the angle of needle insertion can be ensured. After the probe is withdrawn, the guide wire can pass through the path of the rubber inner core

As an improvement, a needle handle convenient to hold is arranged on the rear side wall of the joint. Although the joint can be used as a holding part for puncture during puncture, the joint is round in appearance and is not easy to grasp firmly. The sheet-shaped needle handle is arranged, so that the use habit is better met.

As a further improvement, the rear end of the probe is provided with a grab handle. The probe needs to be withdrawn after probing to the venous site. The handle is arranged to facilitate holding and withdrawing the needle.

As another further improvement, the front end of the probe is a tip, and the front end of the puncture needle body is provided with a bevel. The puncture is more convenient.

As an improvement, the barrel further comprises a rear cover for closing the rear end of the barrel. Before use, the device is used for sealing the cylinder body to prevent dust and other impurities from entering.

As a refinement, the probe is hollow. The probe can be provided in solid or hollow. The solid probe has high strength, but can only judge whether to puncture the vein by the hand feeling and experience of medical staff. And the hollow probe can judge whether the vein is punctured or not through blood returning, so that the operation is more intuitive.

The utility model discloses an useful part lies in: the deep vein puncture needle with the structure ensures the puncture safety through two aspects. Firstly, set up the joint perpendicular with the needle body and regard as the maintenance portion for needle body and clavicle can keep parallel needle insertion to ensure that the pjncture needle can not the slant get into the human body and cause the damage of pleura, artery. The puncture of the puncture needle is carried out after the vein position is punctured by the probe. The probe is thin, the wound is tiny, and even accidental injury can not cause great damage to pleura and artery. And the needle inserting path and the needle inserting depth of the puncture needle become controllable through the matching of the gear and the rack, so that the risk of accidental injury is greatly reduced.

Drawings

Fig. 1 is a sectional view of the present invention.

FIG. 2 is a schematic view of the probe after needle withdrawal.

Fig. 3 is an external view of the present invention.

The labels in the figure are: 1 probe, 2 puncture needle bodies, 3 cylinders, 4 sliders, 5 rubber inner cores, 6 hoses, 7 joints, 8 needle handles, 9 grab handles, 10 racks, 11 rear covers and 12 driving gears.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the specific embodiments.

As shown in fig. 1, 2 and 3, the utility model comprises a puncture needle body 2, wherein the puncture needle body 2 is hollow, and the rear end of the puncture needle body is fixed on a sliding block 4; the sliding block 4 is arranged in the cylinder 3 and can slide back and forth along the cylinder 3; the barrel 3 is provided with a joint 7 vertical to the barrel; the connector 7 is used for connecting devices such as a syringe, an infusion set and the like. The side wall of the sliding block 4 is provided with an axial rack 10, and the side wall of the cylinder 3 is provided with a driving gear 12 meshed with the rack 10; a rubber inner core 5 is arranged in the sliding block 4; the puncture needle also comprises a probe 1, wherein the probe 1 penetrates through the rubber inner core 5 and the puncture needle body 2 from the rear end of the cylinder 3; the puncture needle body 2 is communicated with a joint 7 by a hose 6.

The back side wall of the joint 7 is provided with a needle handle 8 which is convenient to hold. The rear end of the probe 1 is provided with a grab handle 9.

The front end of the probe 1 is a tip, and the front end of the puncture needle body 2 is provided with an inclined plane.

And a rear cover 11 for closing the rear end of the cylinder 3. The probe 1 is hollow and can be solid.

In order to avoid the back movement of the puncture needle body 2, an anti-rotation device can be arranged on the driving gear 12, and when the puncture needle is inserted and after the needle is inserted in place, the anti-rotation device is used for clamping the driving gear 12. Even when the drive gear 12 is fixed by fingers at the time of use, in order to reduce the cost.

When in use, the probe 1 penetrates through the rubber inner core 5 of the sliding block 4 and the puncture needle body 2 from the rear end of the cylinder 3, and the tip of the probe extends out of the front end of the puncture needle body 2. When the needle is inserted, the medical staff holds the needle handle 8 to be parallel to the clavicle for insertion. After the probe 1 is punctured into a vein, the probe 1 is pulled out from the rear end of the cylinder 3. Because the rubber inner core 5 has elasticity, the hole of the probe 1 after needle withdrawal can be sealed, and liquid leakage is avoided. Then the drive gear 12 is dialed by fingers to cause the slide block 4 to drive the puncture needle body 2 to puncture along the needle inserting track of the probe 1, thereby ensuring the accuracy of puncture. Meanwhile, the needle inserting depth is more controllable by using the gear rack to drive the needle inserting mode than by only using the hand to insert the needle. Since the puncture needle body 2 is connected to the connector 7 through the hose 6, the movement of the puncture needle body 1 is not hindered. After the puncture needle is inserted, the guide wire extends into the vein from the rear end of the cylinder along the path of the original probe and is used for implanting a central venous catheter.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.

Claims

1. An improved central venous catheter puncture needle comprises a puncture needle body and is characterized in that: the puncture needle body is hollow, and the rear end of the puncture needle body is fixed on the sliding block; the sliding block is arranged in the cylinder body and can slide back and forth along the cylinder body; the cylinder body is provided with a joint perpendicular to the cylinder body; the side wall of the sliding block is provided with an axial rack, and the side wall of the cylinder is provided with a driving gear meshed with the rack; a rubber inner core is arranged in the sliding block; the puncture needle also comprises a probe, and the probe penetrates through the rubber inner core and the puncture needle body from the rear end of the cylinder body; the puncture needle body is communicated with the joint through a hose.

2. An improved central venous catheter introducer needle as claimed in claim 1 wherein: a needle handle convenient to hold is arranged on the rear side wall of the joint.

3. An improved central venous catheter introducer needle as claimed in claim 1 wherein: a grab handle is arranged at the rear end of the probe.

4. An improved central venous catheter introducer needle as claimed in claim 1 wherein: the front end of the probe is a tip, and the front end of the puncture needle body is provided with an inclined plane.

5. An improved central venous catheter introducer needle as claimed in claim 1 wherein: and the rear cover is used for closing the rear end of the cylinder body.

6. An improved central venous catheter introducer needle as claimed in claim 1 wherein: the probe is hollow.