CN105902304A

CN105902304A - Conical tip type deep vein puncture needle

Info

Publication number: CN105902304A
Application number: CN201610367663.6A
Authority: CN
Inventors: 罗和国; 蔺琳
Original assignee: Wuyishan Jiean Medical Devices Manufacturing Co Ltd
Current assignee: Wuyishan Jiean Medical Devices Manufacturing Co Ltd
Priority date: 2016-05-27
Filing date: 2016-05-27
Publication date: 2016-08-31

Abstract

The invention discloses a conical tip type deep vein puncture needle which comprises a core needle and an outer sleeve needle. The core needle is integrally composed of a core needle connector 1, a hollow core needle body 2 and a closed conical tip type needle point 5. The position, close to the conical tip type needle point, of the core needle body is provided with a core needle small hole 4. The outer sleeve needle is integrally composed of an outer sleeve needle connector 7, a sleeve needle body 3 and a needle end 8. The position, close to the needle end, of the sleeve needle body is provided with a sleeve needle small hole 6. An annular inclined face is arranged on the needle end. The core needle and the outer sleeve needle are movably connected through the core needle connector 1 and the outer sleeve needle connector 7. The needle end of the outer sleeve needle and the needle point of the core needle are combined into a conical tip shape, liquid enters and leaves the needle through the core needle small hole and the sleeve needle small hole, and puncture incision is small during deep vein puncture. The sleeve needle body of the outer sleeve needle and the core needle body can slide, large incisions are avoided even when pleura or artery is punctured by mistake, gas leakage and blood leakage are avoided, and injuries of patients is greatly reduced.

Description

Cone formula deep vein puncture needle

Technical field

The present invention relates to a kind of deep vein puncture needle, particularly relate to a kind of cone formula deep vein puncture needle.

Background technology

At present, the pin diameter for deep vein puncture is relatively thick clinically, if thus wear pleura when puncturing and cause pneumothorax thereafter by mistake Fruit is serious, can cause serious pneumothorax, cause patient respiration difficulty the most dead.If perforating arteries causes cervical region hematoma by mistake, affect brain Portion's blood supply and compressing air flue, severe patient may also lead to the death of patient.

China Patent No. ZLCN200820179450.1 discloses one can try deep vein puncture needle on, and it is by No. 18 bodkins With No. 24 fine needle composition, in wherein fine needle is enclosed within bodkin, the tip of fine needle is exposed at the most advanced and sophisticated outer 1.5cm of bodkin needle point, and two The other end of pin is connecting portion, is connected with the connecting portion of injector syringe.This can be tried on when deep vein puncture needle uses first through being enclosed within Fine needle inside bodkin is tried on, after pumpback of threading a needle has blood, by be enclosed within bodkin outside fine needle along slide before fine needle direction and with The needle point of fine needle flushes, and is extracted out by fine needle, after bodkin is enclosed within syringe regulation paracentesis depth pumpback has blood, and this utility model The generation of the such as hemopneumothorax, hematoma of severe complication caused by traditional deep vein puncture needle can be reduced.

But above-mentioned utility model exists following not enough: first fine needle all has one oblique as regular injection syringe needle with the needle point of bodkin Face, when fine needle is enclosed within bodkin, total inclined-plane area of two syringe needles is relatively big, the tissue to the site of puncture of patient when puncturing Producing certain damage, it two is to there is an annular space between the outer surface of fine needle and the inner surface of bodkin, easily occurs when puncture procedure Gas leakage and the generation of leakage blood phenomenon.

Summary of the invention

It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of cone formula deep vein puncture needle.

Technical scheme is summarized as follows:

Cone formula deep vein puncture needle, including core needle and outer casing needle, described core needle is by core needle union joint 1, the core needle needle body 2 of hollow With the cone formula needle point 5 one composition of Guan Bi, at the nearly cone formula needle point of core needle needle body, it is provided with core needle aperture 4；Described overcoat Pin is integrally made up of outer casing needle union joint 7, set needle body 3 and needle end part 8, is provided with trocar aperture 6 at the nearly needle end part of set needle body, Needle end part is provided with annular chamfer, annular chamfer and the angle angle of set needle body centrage and cone formula pinpoint inclined plane and core needle needle body The angle angle of centrage is identical, and core needle and outer casing needle are flexibly connected, outside making by core needle union joint 1 and outer casing needle union joint 7 The inner surface of the set needle body of trocar contacts with the outer surface of core needle needle body and core needle needle body can be made to slide in trocar body.

Advantages of the present invention:

The cone formula deep vein puncture needle of the present invention, core needle people's needle point does not has hole, and in the cone formula of Guan Bi, outer casing needle is enclosed within core needle After, the needle end part of outer casing needle and the needle point of core needle are also combined into cone tip shape, and liquid is passed in and out by core needle aperture and trocar aperture, When carrying out puncturing during deep vein puncture, cut is little.The inner surface of the set needle body of outer casing needle contacts with the outer surface of core needle needle body and can slide Dynamic, do not result in big cut after wearing pleura or tremulous pulse, it is to avoid gas leakage and leakage blood by mistake, the damage to patient greatly reduces.

Accompanying drawing explanation

Fig. 1 is cone formula deep vein puncture needle core needle schematic diagram.

Fig. 2 is cone formula deep vein puncture needle outer casing needle schematic diagram.

Fig. 3 is that core needle and outer casing needle are by core needle union joint and outer casing needle union joint connection diagram.

Fig. 4 is core needle and outer casing needle partial cutaway schematic.

Detailed description of the invention

The present invention is further illustrated below in conjunction with the accompanying drawings.

Cone formula deep vein puncture needle, including core needle and outer casing needle, core needle is by core needle union joint 1, core needle needle body 2 and of hollow The cone formula needle point 5 one composition of Guan Bi, is provided with core needle aperture 4 at the nearly cone formula needle point of core needle needle body；Outer casing needle is by outward Trocar union joint 7, set needle body 3 and needle end part 8 one composition, be provided with trocar aperture 6, pin end at the nearly needle end part of set needle body Portion is provided with annular chamfer, annular chamfer and the angle angle of set needle body centrage and cone formula pinpoint inclined plane and core needle needle body center The angle angle of line is identical, and core needle and outer casing needle are flexibly connected by core needle union joint 1 and outer casing needle union joint 7, make outer casing needle Set needle body inner surface contact with the outer surface of core needle needle body and core needle needle body can be made to slide in trocar body.

Core needle union joint 1 can be connected with the connecting portion of the syringe of syringe with outer casing needle union joint 7.

Use:

First core needle and outer casing needle are connected by core needle union joint and outer casing needle union joint and are connected with injector syringe, core needle aperture Relative with trocar aperture, carry out deep vein puncture and try on, after core needle penetrates Deep venou blood back, the overcoat outside core needle will be enclosed within Pin slides forward along core needle and concordant with the needle point of core needle, core needle is extracted out, and outer casing needle regulates after being connected with injector syringe and wears After thorn degree of depth pumpback has blood.

Claims

1. cone formula deep vein puncture needle, including core needle and outer casing needle, is characterized in that described core needle is by core needle union joint (1), hollow Cone formula needle point (5) the one composition of core needle needle body (2) and Guan Bi, is provided with core needle at the nearly cone formula needle point of core needle needle body Aperture (4)；Described outer casing needle is made up of outer casing needle union joint (7), set needle body (3) and needle end part (8) one, overlaps needle body Nearly needle end part at be provided with trocar aperture (6), needle end part is provided with annular chamfer, annular chamfer and the folder of set needle body centrage Angle angle is identical with the angle angle of cone formula pinpoint inclined plane and core needle needle body centrage, and core needle and outer casing needle are by core needle union joint (1) it is flexibly connected with outer casing needle union joint (7), makes the inner surface of the set needle body of outer casing needle contact with the outer surface of core needle needle body And core needle needle body can be made to slide in trocar body.