An injection device and injection system for automatic intravenous injection

Abstract

The invention discloses an injection device and an injection method for automatic intravenous injection. The device includes a syringe for injection, a front cylinder, a piston, a piston rod, a motor system and a rear cylinder. The front cylinder is used for Fix the syringe, the inner diameter of which is the same as the outer diameter of the syringe and smaller than the inner diameter of the rear cylinder; the piston handle of the syringe is installed on the piston, and the piston rod is used to push through the control of the motor system Piston movement; the motor system is used to control the syringe to inject or draw medicine according to the control instruction; the inner diameter of the rear cylinder is the same as the diameter of the piston and is used for piston movement. The injection device provided by the invention adopts a double-layer piston structure, which reduces the sensitivity of the piston, keeps the piston stable, and injects at a constant speed; through the automatic intravenous injection method, no nurses are required to operate, saving time and effort, and reducing the labor burden of medical staff.

Description

technical field [0001] The invention relates to a medical device, in particular to an injection device and an injection method for automatic intravenous injection. Background technique [0002] Intravenous injection is a commonly used medical method, that is, liquid substances such as blood, medicinal liquid, and nutrient solution are injected directly into the vein. [0003] At present, the existing intravenous syringes are generally pushed and pressed by nurses to inject medicine, which is not only labor-intensive, but also difficult to ensure that the medicine is injected into the vein at an even speed, which is likely to cause discomfort to the patient. Moreover, it often takes more than ten minutes or even half an hour for nurses to give patients intravenous injections, which greatly wastes the time of nurses, and the operation is cumbersome, time-consuming and laborious; A hypertonic dehydrating agent, which can rapidly increase the osmotic pressure of blood when it e...

AI Technical Summary

Problems solved by technology

Therefore, intravenous bolus injection of mannitol requires a special person to concentrate on the operation. During this period, the medical staff need to hold the propeller and slowly maintain a constant speed, which is very demanding for the medical staff; moreover, the operation intensity is high, and it is difficult to ensure that the drug is injected into the vein at a uniform speed. , medical staff are prone to fatigue and cause discomfort to patients

[0004] Furthermore, patients sometimes only need intravenous injection of some drugs they know clearly, and they have to go to the hospital for intravenous injection, which cannot be done at home alone, which is inefficient

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