CN2516171Y

CN2516171Y - Double-trocar deep vein puncture needle

Info

Publication number: CN2516171Y
Application number: CN 02219373
Authority: CN
Inventors: 蒋忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-03-18
Filing date: 2002-03-18
Publication date: 2002-10-16
Anticipated expiration: 2012-03-18

Abstract

Disclosed is a double-sleeve deep-venipuncture needle, comprising a needle pipe and a needle pipe seat. An intra-cavity of the needle pipe seat is communicated with the needle pipe seat. The utility model is characterized in that a thick and a thin needle pipes are respectively fixedly arranged on the respective needle pipe seats; the thin needle pipe goes through the thick needle pipe and is longer than the thick needle pipe in a section; a head part of the thin needle pipe seat is in thread connection with the tail part of the thick needle pipe seat; the outer diameter of the thin needle pipe is sliding matched with the inner diameter of the thick needle pipe; the head part of the thin needle pipe is at least 10 mm longer than the head part of the thick needle pipe, and both walls of the two needle pipes are provided with graduations.

Description

Two sleeve pipe deep vein puncture pins

This utility model relates to the clinical quick blood transfusion and infusion that is used for, and the deep vein puncture pin, particularly a kind of pair of sleeve pipe deep vein puncture pin of operation such as central venous pressure monitoring usefulness belong to medical apparatus and instruments.

The deep vein puncture pin is widely used in clinical, can transfuse blood fast, transfusion, central venous pressure monitoring, places float catheter etc.Existing clinical deep vein puncture pin commonly used is a 18G (international medical standard model, 1.3 millimeters of external diameters) single chamber puncture needle, because of its needle tubing is thicker, try in the process repeatedly as careless large artery trunks, nerve and the pleura of accidentally injuring, can cause severe complication even death such as huge hematoma, hemopneumothorax.Above-mentioned existing apparatus has limited the extensive utilization of deep vein puncture technology.

The purpose of this utility model is the deficiency that overcomes above-mentioned existing apparatus, a kind of two sleeve pipe deep vein puncture pins of composite needle tube structure are provided, try the thinner inner needle tube of employing in the thorn process repeatedly on, treat in pin enter dark vein pumpback blood unimpeded after, to be enclosed within outer needle tubing thicker on the inner needle tube external diameter again and enter human vein, fixing outer pin withdraws from interior pin, connect the unimpeded back of syringe pumpback blood and insert guide wire, insert dark venous duct then and operate by existing SeldingerShi method.

Above-mentioned purpose of the present utility model realizes by following technical scheme:

Two sleeve pipe deep vein puncture pins, include needle tubing and needle tubing seat, needle tubing seat inner chamber is communicated with needle tubing, it is characterized in that being provided with thick, thin two needle tubings, be individually fixed on the needle tubing seat separately, small needle tube passes the bodkin pipe and grows outer one section of bodkin tube head, and the head of small needle tube base connects with bodkin tube socket tailing screw flight.Between the internal diameter of the external diameter of small needle tube and bodkin pipe for being slidingly matched.The small needle tube head length goes out the bodkin tube head and is not less than 10mm.The tube wall of two needle tubings is equipped with scale.

Advantage of the present utility model and effect: because interior pin is thinner, can alleviate when trying on repeatedly bodkin to the damage of nervus vasculairs, as interior pin pumpback scarlet arterial blood or gas are arranged, then explanation is strayed into tremulous pulse or pleura, can adjust the puncture direction immediately, avoid bodkin to thrust, improved processing safety greatly, help applying of deep vein puncture technology.

The utility model is described in further detail below in conjunction with embodiment that accompanying drawing provides:

Fig. 1 is existing single needle pipe deep vein puncture pin;

Fig. 2 is this utility model puncture needle.

Referring to Fig. 1, needle tubing 1 is fixed in the needle tubing seat 2 and with chamber within the base and is communicated with.During puncture procedure, the base afterbody connects syringe.The existing clinical needle tubing that is used for deep vein puncture is generally selected the 18G model for use, needle tubing seated total length is about 10cm, the long approximately 4cm of needle stand part, and needle tubing during operation is because internal diameter need feed guide wire, so it is thin that its diameter can not be done, thereby can cause the unsafe factor of aforementioned single tube puncture needle.

Fig. 2 is the two-tube deep vein puncture pin of a kind of inside and outside tubular type of composite construction, the still available existing 18G model of its outer tube puncture needle, a tubule (interior pipe) puncture needle has just thereunder superposeed, its needle tubing 1 ' can be selected standard 7# pin (0.7 millimeter of external diameter) for use, penetrate its afterbody cavity to bodkin pipe 1 internal diameter and expose outside the bodkin tube head one section, (generally being not less than 10mm) by bodkin base 2.Connect by screw thread is movable between the base 2 and 2 ' of two needle tubings.During puncture when interior pin enter dark vein pumpback blood unobstructed after, unclamp the spiral (establish 1～2 buckle get final product) of needle tubing seat, push away 10mm far can enter vein along interior pin before with outer pin, this moment, fixing outer pin withdrawed from interior pin, after the syringe pumpback blood that connection communicates with outer needle tubing base rear end is unimpeded, carry out subsequent operation by existing Seldinger method again.

In this utility model structure, gap between the inside and outside needle tubing should be as far as possible little, when because when selecting for use existing finished product needle tubing to make, if gap between two pipes is when big slightly, can partly and within the outer needle tubing be filled between the footpath in the length of footpath in outer needle tubing outside the inner needle tube, as can on footpath outside the interior pipe, coating or coating.

Claims

1. two sleeve pipe deep vein puncture pins, include needle tubing and needle tubing seat, needle tubing seat inner chamber is communicated with needle tubing, it is characterized in that being provided with thick, thin two needle tubings, be individually fixed on the needle tubing seat separately, small needle tube passes the bodkin pipe and grows outer one section of bodkin tube head, and the head of small needle tube base connects with bodkin tube socket tailing screw flight.

2. according to claim 1 pair of sleeve pipe deep vein puncture pin is characterized in that between the internal diameter of the external diameter of small needle tube and bodkin pipe for being slidingly matched.

3. according to claim 1 and 2 pair of sleeve pipe deep vein puncture pin is characterized in that the small needle tube head length goes out the bodkin tube head and is not less than 10mm.

4. according to described pair of sleeve pipe deep vein puncture of claim 3 pin, it is characterized in that the tube wall of two needle tubings is equipped with scale.