A drug injector driven by piezoelectric film

Abstract

The invention relates to a medicine injector driven by a piezoelectric sheet, which belongs to the field of medical equipment. The top of the main body is equipped with a syringe with an auxiliary piston and a cylinder chamber. The main piston separates the cylinder chamber into left and right cylinder chambers; the main piston push rod protrudes from the left wall of the cylinder chamber and leans against the auxiliary piston push rod; the bottom of the main body There are upper air intake holes, bosses and multiple round table groups; the top of the box is equipped with lower air inlet holes, holes, an air storage chamber connected to the lower outlet cavity, and body cavity groups that are equal to the number of round table groups and the number of round tables contained in them. and the body cavity; the main body is installed on the box body, and the boss is placed in the cavity to connect the upper and lower outlets and the air storage chamber; the round table presses the driver in the body cavity through the sealing ring to form the upper and lower compression chambers. The upper and lower compression chambers are connected in parallel to form upper and lower compression chamber groups, and each upper compression chamber group and each lower compression chamber group are connected in series to form upper and lower compression units; The valve is connected with the air storage chamber.

Description

technical field [0001] The invention belongs to the field of medical equipment, and in particular relates to a medicine injector driven by a piezoelectric sheet. 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 t...

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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