CN203227108U - Vein needle - Google Patents

Abstract

The utility model provides a venous needle, which comprises a needle seat, a catheter and a needle head, the catheter is connected to the needle seat and the needle head, and a one-way valve is arranged on the catheter. The venous needle can effectively prevent blood back phenomenon in the transfusion process, make the transfusion safer, and reduce the workload and unnecessary troubles of medical workers.

Description

a vein needle

technical field

The utility model belongs to the field of medical equipment and relates to a disposable infusion set, in particular to a venous needle.

Background technique

At present, the intravenous needle of a common disposable infusion set consists of a needle base, a needle, and a conduit connecting the needle base and the needle. During the infusion, in some cases, the fluid in the catheter can flow back and cause blood to return. To a certain extent, the blood return makes patients have psychological doubts and panic, resulting in negative effects of treatment.

Contents of the invention

The purpose of the utility model is to provide a venous needle which has a simple structure and can effectively prevent blood return.

The technical scheme of the utility model: a venous needle, including a needle seat, a catheter, and a needle head, and the catheter connects the needle seat and the needle head, and is characterized in that a one-way valve is arranged on the catheter.

The beneficial effect of the utility model is: when the liquid in the catheter flows back under certain circumstances, the one-way valve will prevent the liquid medicine in the catheter at the needle end from flowing back, thereby preventing the blood from flowing back and preventing the occurrence of back blood. At the same time, the workload of nursing staff is reduced, the operation is more convenient, time and effort are saved, and work efficiency is improved.

Description of drawings

Fig. 1 is the structural diagram of the venous needle of the present utility model;

Fig. 2 is a structural schematic diagram of the one-way valve of the venous needle of the present invention.

Detailed ways

As shown in Figure 1, the utility model provides a venous needle, which includes a needle base 1, a catheter 2, and a needle head 5. A one-way valve 3 is provided on the conduit 2 . As shown in Figure 2, the one-way valve is made of loam cake 31, spool 32, silicon rubber sheet 33, lower cap 34, and the upper end of loam cake 31 has the joint a that is connected with needle seat end conduit 21, and the lower end of lower cap 34 has with The joint b connected to the needle end conduit 22 fixes the valve core 32 after the upper cover and the lower cover engage. A through hole is arranged on the spool 32, and the raised end on the silicon rubber sheet passes through the central through hole, and is connected with the spool 32 in cooperation, and keeps a suitable distance so that it has a certain activity margin. During normal infusion, the medicinal liquid pushes away the silicone rubber sheet 33, flows into the needle through the through hole of the valve core 32, and enters the body. When backflow occurs, the silicone rubber sheet 33 will move in the opposite direction to press the through hole of the valve core, thereby preventing the medicine liquid from backflowing.

Claims (2)

1. an intravenous needle comprises needle stand, conduit, syringe needle, and conduit connects needle stand and syringe needle, it is characterized in that, is provided with check valve at conduit.

2. intravenous needle according to claim 1 is characterized in that, described check valve is by loam cake, spool, silicone rubber plate, lower cover constitutes, there is the joint that is connected with needle stand end conduit the upper end of loam cake, there is the joint that is connected with the needle end conduit lower end of lower cover, loam cake with valve core is fixed after lower cover engages, through hole is arranged on the spool, protruding end on the silicone rubber plate passes central through hole, be connected with spool, and keep suitable spacing, make it that certain activity surplus be arranged.

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