Step-by-step pressurizing pneumatic infusion device

Abstract

The invention relates to a step-by-step pressurizing pneumatic infusion device, and belongs to the field of medical instruments. A main body is provided with an upperinlet hole, a boss with an upper outlet cavity and an outlet holeand at least two round table groups of which the number of round tables contained sequentially changes; an upper inlet cavity and an upper air outlet hole are formed inone round table of the round table groups, and upper vent holes are formed in the other round tables; a capsule of the main body is internally provided with an infusion bag with an air cavity and a drug cavity, and the air cavity is connected with the outlet hole; a base is provided with a lower inlet hole, a hole cavity with a lower outlet cavity and a body cavity group formed by body cavities;alower inlet cavity and a lower air outlet hole are formed in one body cavity of the body cavity group, and lower vent holes are formed in the other body cavities; the upper and lower inlet and outletcavities and valve plates therein constitute upper and lower inlet and outlet valves; the main body is mounted on the base and makes the upper and lower outlet cavities and the outlet hole be communicated with each other, theround tables press piezoelectric actuators into the body cavities through sealing rings to form upper and lower compression cavities, the upper and lower compression cavitiesin the same body cavity group are respectively connected in parallel to form upper and lower compression cavity groups, and the upper and lower compression cavity groups are respectively connected inseries to form upper and lower compression units which are connected in parallel.

Description

technical field [0001] The invention belongs to the field of medical devices, and in particular relates to a step-by-step pressurized pneumatic infusion 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 th...

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

Images