A pneumatic infusion device

Abstract

The invention relates to a pneumatic infusion device, and belongs to the field of medical instruments. A box body is provided with a buffer cavity, an upper outlet hole, a lower outlet hole, an upperinlet hole and a lower inlet hole, the upper side and lower side of the box body are both provided with an outlet cavity and at least two body cavity groups, and the number of body cavities containedin the body cavity groups from the inlet holes to the outlet holes is decreased respectively in sequence; one body cavity in the body cavity groups is provided with an inlet cavity and an air outlet hole, and other body cavities are only provided with vent holes; the inlet cavity, an outlet cavity and valve plates arranged in the inlet cavity and outlet cavity form an inlet valve and an outlet valve; an upper cover and a bottom plate are arranged at the upper side and lower side of the box body, a piezoelectric actuator is in pressing connection to the interior of each body cavity through a seal ring to form a compression cavity, and the compression cavities in the same body cavity group are connected into a compression cavity group in parallel; the inlet holes, compression cavity groups,outlet cavities and outlet holes in the upper side and lower side of the box body are connected into an upper compression unit and a lower compression unit in series respectively, and the upper compression unit and the lower compression unit are connected in series through the buffer cavity; a bag cavity of the upper cover is internally provided with an air bag and a medicine bag, and the end of the bag cavity is provided with a baffle; the air bag is communicated with the upper outlet hole through an air delivery pipe, and an infusion tube of the medicine bag is provided with a needle and a flow valve.

Description

technical field [0001] The invention belongs to the field of medical equipment, and in particular relates to a pneumatic 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 ...

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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