Antithrombotic device for venous indwelling needle

Abstract

The invention relates to the field of medical appliances, and in particular relates to a thrombosis prevention device of a venous indwelling needle. The thrombosis prevention device is composed of a sleeve seat, a sleeve, a piston, a pushing pipe and a needle core and is characterized in that the piston is arranged in the sleeve seat, the piston is fixed at the end of the pushing pipe, and the needle core is located in the pushing pipe and is sleeved in the sleeve after penetrating through the piston. Transfusion can be carried out after venous puncture and needle core pulling-out according to the normal operation. When the transfusion is paused and the pipe is sealed, the piston is pushed forward and seals the water inflow hole of the sleeve. When the transfusion is continued, the piston is pulled backward. The thrombosis prevention device provided by the invention is simple to operate, and has double thrombosis prevention functions of positive pressure and blood backflow sealing and preventing.

Description

technical field [0001] The invention relates to the category of medical devices, and is an antithrombotic device for venous indwelling needles. Background technique [0002] Existing intravenous infusion needles are prone to puncture blood vessels during infusion and must be replaced every day. The invention and application of the venous indwelling needle overcomes these shortcomings. After the venipuncture is completed, the needle core needs to be pulled out, leaving the cannula, so the blood vessel will not be damaged, and it can be kept in the blood vessel for several days. [0003] However, once the infusion of the existing venous indwelling needle is suspended, blood will return, and a thrombus will be formed at the end of the cannula to cause blockage. Even if the pressure is flushed, the thrombus will block the capillaries, resulting in vasculitis. To solve these problems, patents and products in recent years have used anticoagulant-made needle-sealing solutions or ...

AI Technical Summary

Problems solved by technology

In order to solve these problems, recent patents and products use anticoagulant-made needle sealing solution or positive pressure method to reduce and delay the formation of thrombus, but cannot completely prevent the formation of thrombus after suspending infusion.

There is a kind of one-way valve principle to prevent blood backflow and anti-thrombosis. Although it has some effects, the process is complex and the performance is unreliable, so it is difficult to be widely used.

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