Safety valve assembly suitable for micro-dose infusion, micro-dose secretion pump and insulin pump

Abstract

The invention provides a safety valve assembly suitable for micro-dose infusion, a micro-dose secretion pump and an insulin pump. The safety valve assembly comprises a valve body, a flexible body and a needle withdrawing unit. The valve body is connected with a medium output device, the flexible body is connected between the valve body and the medium output device, and the needle withdrawing unit is connected with the valve body; the medium output device is provided with a medium inlet and outlet and a flexible body driving port, a first pipeline is arranged in the valve body, the input end of the first pipeline is connected with the medium inlet and outlet, the output end of the first pipeline is located on one side of the flexible body, and the flexible body driving port is located on the other side of the flexible body; and the sectional area of the medium inlet and outlet is smaller than that of the flexible body driving port. The problem that the medium injection speed is too high in the output failure process of medium output device can be solved, and under certain application conditions such as insulin or medicament injection, excessive injection can cause life danger.

Description

technical field [0001] The invention relates to the field of injection equipment, in particular to a safety valve assembly suitable for micro-dosage infusion, a micro-dosage secretion pump and an insulin pump. Background technique [0002] An insulin pump consists of a pump, a small syringe, and an infusion tube connected to it. The small syringe can hold up to 3ml of insulin. After the syringe is loaded into the pump, the guide needle at the front end of the connected infusion tube is pierced into the patient's subcutaneous (usually the abdominal wall) with a needle injector, and the screw motor of the insulin pump is driven by a battery. Push the plunger of the small syringe to infuse insulin into the body. The basic purpose of the insulin pump is to simulate the secretion of the human pancreas for infusion, and continuously inject insulin into the subcutaneous of the user according to the dose required by the human body, so as to keep the blood sugar stable throughout th...

AI Technical Summary

Problems solved by technology

[0004] However, although it is an effective solution to control the opening and closing time of the air pump through the MCU, the air pressure in the air pump changes (decays gradually). Too much will cause the insulin pump to infuse the insulin too fast, exceeding the normal insulin secretion level of the human body, resulting in adverse consequences. Therefore, it is necessary to design a safety valve to prevent the infusion speed from being too fast

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