CN201257220Y

CN201257220Y - Back flow prevention retention needle

Info

Publication number: CN201257220Y
Application number: CNU2008201374543U
Authority: CN
Inventors: 郑金路; 余真珠; 淦华姣
Original assignee: JIANGXI SANXIN MEDICAL DEVICES GROUP CO Ltd
Current assignee: Jiangxi Sanxin Medtec Co., Ltd
Priority date: 2008-08-28
Filing date: 2008-08-28
Publication date: 2009-06-17
Anticipated expiration: 2018-08-28

Abstract

The utility model relates to a transfusion medical instrument which belongs to the technical field of medical instruments and can solve the blood or liquid inverse flowing phenomenon of a leave pin caused by various reasons. The reverse-flowing resistant leave pin of the utility model comprises a pin tube, a pin base, a catheter, a catheter base, a pin core, a valve plate and the like. A reverse-flowing resistant front end is the valve plate which can be opened and is formed by welding two symmetric flat elastic bodies or rubber, and the back end is an installation part made from a cylindrical material. After the pin tube is pulled out, the blood in the body reversely flows by the action of the pressure difference of the inner vein pressure and the outside pressure, and the valve plate structure seals by the reverse-flowing function of the blood in the catheter base to effectively prevent the blood from reversely flowing. In the transfusion process, because the gravity function of the outside liquid, the inner pressure of the outside transfusion tube is higher than the vein pressure to flush off the valve plate so as to achieve effective transfusion and enable the utilization of the leave pin product to be safe.

Description

Anti-adverse current remaining needle

Technical field

This utility model product relates to medical apparatus and instruments, refers in particular to a kind of remaining needle product that can prevent adverse current.

Technical background

Remaining needle generally is used for clinically to patient's infusion medicinal liquid, because of it has the vascular puncture of minimizing number of times, reduce sepage, and can carry out the fast infusion medicinal liquid, help alleviating advantages such as painful and convenient rescues of patient, especially straight type remaining needle is widely used in the operation process infusion medicinal liquid and transfusion use fast when rescuing.

At present the most frequently used remaining needle is by needle tubing, needle stand, conduit, catheter block, compositions such as nook closing member, general clinically straight type remaining needle operation is usually in venipuncture procedure, needle tubing and conduit puncture enter in the vein blood vessel, after needle tubing is extracted, because of conduit and catheter block form an opening, must pin the vein front end that is punctured with a hands, reasons such as method of pushing and dynamics are not in place can be caused all that intravenous blood is extracted out to flow out outside the catheter block with needle tubing and forms pollution under the venous pressure effect, need during operation push with a hands to have brought great inconvenience also for the operation of medical personnel's remaining needle.And a large amount of clinical experiences show, remaining needle is during keeping somewhere, and the calparine cap on it and the rubbing action of medicated clothing etc. all can cause it loosening, even comes off, and untimely usefulness is tightened calparine cap sealing duct seat can cause the effusive danger of a large amount of blood.

Summary of the invention

The purpose of this utility model product is to provide a kind of simple to operate, can prevent effectively that blood from refluxing, and avoids the remaining needle of blood contamination and cross infection.In order to solve the phenomenon that existing remaining needle a variety of causes causes blood or liquid countercurrent, designed a kind of built-in valve structure form, can effectively prevent the remaining needle product of adverse current.

The technical solution of the utility model is: a kind of anti-adverse current remaining needle, comprise needle tubing, conduit, nook closing member, needle stand, catheter block, blood back device, it is characterized in that: catheter block is installed with valve block, the rear end of valve block is close to the inner chamber of catheter block, the central axis of two flat of conduit and valve block is in same position, the valve block front end is a strip, and the valve block rear end is that circular configuration tightly adheres to and the catheter block inner chamber.But anti-adverse current front end is welded into the installation position that the valve block rear end of opening is made up of a cylinder type material by two symmetric form flat elastomers or rubber.

This utility model venipuncture finish extract needle tubing after, the effect of and ambient pressure difference intrinsic pressure because of vein, intravital blood refluxes, and above-mentioned valve structure is subjected to blood backflow effect and carries out airtightly in catheter block, effectively prevent blood back flow, and in infusion process, because of the effect of extraneous liquid gravity, extraneous pipe is intrinsic pressure greater than venous pressure, washes valve block open, thereby the transfusion that can effectively carry out makes the use of remaining needle product safer.

Below in conjunction with accompanying drawing this utility model product is described further, and provides specific embodiment.

Description of drawings

Fig. 1 is the anti-adverse current remaining needle structural representation of this utility model.

Fig. 2 is this utility model valve block sketch map.

Fig. 3 is the vertical view of valve structure.

Specific embodiment

As shown in Figure 1, this utility model is prevented the adverse current venous detaining needle, comprise needle tubing 1, conduit 2, nook closing member 4, needle stand 6, blood back device 7, catheter block 3 and be installed in valve block 5 in the catheter block, the rear end of valve block 5 is close to the inner chamber of catheter block 3, and the central axis of two flat of conduit 2 and valve block 5 is in same position.But anti-adverse current front end is welded into the valve block of opening, the installation position that the rear end is made up of a cylinder type material by two symmetric form flat elastomers or rubber.

Fig. 2 is the sketch map of valve for preventing reverse-flow sheet 5, it is the cutaway view of valve structure, the length of two valve block 5 front end driving fits is longer, the valve block rear end forms a circular configuration and tightly adheres to and the catheter block inner chamber, closely pasting mutually of valve block front end can effectively stop blood back flow, and the circular configuration of valve block rear end helps extraneous medicinal liquid and enters, and Fig. 3 is the vertical view of valve structure.

Claims

1, a kind of anti-adverse current remaining needle, comprise needle tubing (1), conduit (2), nook closing member (4), needle stand (6), catheter block (3), blood back device (7), it is characterized in that: catheter block (3) is installed with valve block (5), the rear end of valve block (5) is close to the inner chamber of catheter block (3), the central axis of two flat of conduit (2) and valve block (5) is in same position, valve block (5) front end is a strip, and the valve block rear end is that circular configuration tightly adheres to and the catheter block inner chamber.

2, anti-adverse current remaining needle as claimed in claim 1 is characterized in that: described valve block (5) but front end is welded into the valve block of opening, the installation position that the rear end is made up of a cylinder type material by two symmetric form flat elastomers or rubber.