Micro piezoelectric type infusion apparatus

Abstract

The invention relates to an infusion device, particularly to a micro piezoelectric infusion apparatus. The infusion apparatus comprises an infusion cavity located in a case and a piezoelectric oscillation power device located in the infusion cavity, wherein a liquid inlet and a liquid outlet are communicated with the infusion cavity respectively, a micro piezoelectric infusion unit also comprises a matrix switch baffle and one or more matrix switch membranes, the matrix switch baffle divides the infusion cavity into an oscillation cavity and a flow guide cavity, the matrix switch baffle and the case define a flow guide channel, one end of the flow guide channel is communicated with the liquid inlet, the other end of the flow guide channel is communicated with the liquid outlet, the flow guide channel is also communicated with the oscillation cavity, each matrix switch membrane is located in the flow guide channel and provided with a one-way flow guide piece, and flow guide directions of the one-way flow guide pieces are consistent. According to the micro piezoelectric infusion apparatus, a multistage serially-connected one-way matrix switch and a ceramic piezoelectric technology are effectively combined, the low backpressure and the flow direction instability of a single gas-liquid switch are improved, and the singleness and the accuracy of the gas-liquid flow direction are guaranteed.

Description

technical field [0001] The invention relates to a supportless infusion device, in particular to a miniature piezoelectric infusion set. Background technique [0002] The medical infusion set used now is composed of three parts: an infusion bottle, an infusion set and a fixed bracket, and the fixed bracket is indispensable. For infusion, due to the limitation of high and low pressure difference, the infusion speed has a certain limit. The time for infusion of 500ml of 7-gauge needle is 80-90 minutes. Clinically, diseases that require rapid infusion, such as dehydration and massive blood loss, often use double-tube infusion. At the same time, due to the limitation of fixed brackets in field conditions, infusion cannot be done anytime and anywhere, which delays the treatment time. The current infusion device needs an infusion stand, and the disadvantage of this infusion method is that it takes up a lot of space and is inconvenient to move, especially not suitable for first aid...

AI Technical Summary

Problems solved by technology

[0002] The medical infusion set used now is composed of three parts: an infusion bottle, an infusion set and a fixed bracket, and the fixed bracket is indispensable. For infusion, due to the restriction of high and low pressure difference, the infusion speed has a certain limit. The time for infusion of 500ml of needle No. 7 is 80-90 minutes

Clinically, diseases that require rapid infusion, such as dehydration and massive blood loss, often use double-tube infusion. At the same time, due to the limitation of fixed brackets, infusion can not be infused anytime and anywhere in field conditions, which delays the treatment time

The current infusion device needs an infusion stand. The disadvantage of this infusion method is that it takes up a lot of space and is inconvenient to move. It is especially not suitable for first aid, field treatment, and field treatment.

Although there are also inventors who have designed different stand-free infusion devices, the pressurization method is nothing more than the use of a pressurization pump, which is complex in structure, requires electric energy, and has certain limitations in use; another pressurization method is to use Pressurized air bag, this method cannot guarantee the constant pressure of the infusion, which may easily cause medical accidents

And in the patent application number: 200910104927.9 invention creation name is: "upright self-priming piezoelectric ceramic pump" discloses a kind of infusion device, although it discloses adopting piezoelectric ceramic sheet to realize the purpose of infusion, and adopts single The directional valve ensures the unidirectionality of the liquid flow direction, but its structure has a slow infusion speed, and it must be upright, which is inconvenient to use

Images