Portable infusion device

Abstract

The invention relates to a portable infusion device and belongs to the field of medical instruments. The base is provided with an inlet hole, at least two sinking cavity groups formed by sinking cavities, outlet cavities and an air storage chamber, wherein the number of the sinking cavities contained in each sinking cavity group from left to right is reduced in sequence; inlet cavities and vent holes are formed in the leftmost sinking cavity in each sinking cavity group, and other sinking cavities are provided with air inlet holes and air outlet holes; the inlet and outlet cavities and valve plates mounted in the inlet and outlet cavities form inlet and outlet valves respectively; a main body is mounted on the base and presses a diaphragm on the base, guide holes of the main body and the sinking cavities of the base are symmetrically formed in the two sides of the diaphragm, and piezoelectric stacks in the guide holes press T-shaped pistons on the diaphragm; the diaphragm presses sealing rings into the sinking cavities to form compression cavities; the corresponding compression cavities in each sinking cavity group are connected in parallel to form a compression cavity group, and all the compression cavity groups are connected in series. The top of the main body is provided with a bag cavity provided with an airbag and a medicine bag, a liquid outlet pipe of the medicine bag isprovided with a flow regulating valve and a needle head, and an air inlet pipe of the airbag is connected with the air storage chamber and provided with a switch valve and a deflation valve.

Description

technical field [0001] The invention belongs to the field of medical equipment, and in particular relates to a portable transfusion device. Background technique [0002] Injection mainly includes intravenous injection, intramuscular injection and subcutaneous injection. Intravenous injection is also called infusion drug administration. Most of the existing infusion devices are composed of infusion bottles, infusion tubes and infusion stands. This infusion mode will bring many problems in actual use: the flow rate is adjusted manually, and the flow control accuracy is not enough; the infusion bottle needs to be held high by others when the patient walks or goes to the toilet, which is inconvenient to move and the height of the infusion bottle is not high enough. Make the blood flow back; the patient or the nursing staff need to watch for a long time, if the infusion is not found in time, it may cause an accident; the liquid medicine is in contact with the air, and there is a...

AI Technical Summary

Problems solved by technology

This infusion mode will bring many problems in actual use: the flow rate is adjusted manually, and the flow control accuracy is not enough; the infusion bottle needs to be held high by others when the patient walks or goes to the toilet, which is inconvenient to move and the height of the infusion bottle is not high enough. Make the blood flow back; patients or nurses need to be guarded for a long time, if the infusion is not found in time, it may cause accidents; the liquid medicine is in contact with the air, and the ambient air may be polluted when the air is unclean

In addition to the above direct problems, sometimes the infusion time is shortened by reducing the amount of solution, speeding up the infusion speed, etc., which not only increases the burden on the heart, but also affects the therapeutic effect: intramuscular injection and subcutaneous injection in a relatively short period of time. The biggest disadvantage of injecting into muscle or subcutaneous is that the blood drug concentration varies greatly within an injection cycle, which is not conducive to the effective absorption and utilization of drugs, because most drugs have a better concentration range in the human body, and when the drug concentration is too high Has toxic side effects, if it is too low, it will have no therapeutic effect

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