Medical feedback type columnar piezoelectric automatic microsyringe

Abstract

The invention discloses a medical feedback type columnar piezoelectric automatic microsyringe which comprises a liquid pumping module, an inlet module, an outlet module and a control module, the liquid pumping module is used for pumping liquid medicine, and a piezoelectric pump is arranged in the liquid pumping module; the inlet module is communicated with an inlet of the piezoelectric pump and is used for liquid medicine to flow in; the outlet module is communicated with an outlet of the piezoelectric pump and is used for discharging the liquid medicine; a buffer part is arranged in the outlet module and communicates with an outlet of the piezoelectric pump. The control module is used for controlling operation of the piezoelectric pump and monitoring the flowing state of the liquid medicine. The system is simple in structure, high in modular degree, stable in liquid pumping, good in continuity, convenient and flexible to adjust the liquid pumping amount and the liquid pumping speed, rapid in feedback, low in operation energy consumption, low in noise and suitable for patients needing long-term medication or critical patients needing special needs; the method is convenient to produce, low in cost and suitable for large-scale production and popularization.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a medical feedback columnar piezoelectric automatic micro-injector. Background technique [0002] In the existing treatment, some patients need to inject certain drugs precisely, in a small amount, uniformly, and continuously. Generally, manual injection or peristaltic pump is used for programmed injection; however, the requirements for medical staff are extremely high during manual injection. At the same time, continuous injection for a long time will easily lead to fatigue, which will lead to injection errors, and even endanger the life of the patient in severe cases; when using a peristaltic pump for injection, its stability is guaranteed, but because the principle of the peristaltic pump is to push the medicine through the roller extrusion flexible tube The pressure will be limited, and the peristaltic pump will generate a pulse flow during operation, which will a...

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Problems solved by technology

[0002] In the existing treatment, some patients need to inject a certain drug precisely, in a small amount, uniformly, and continuously. Generally, manual injection or peristaltic pump is used for program injection; however, the requirements for medical staff are extremely high during manual injection. At the same time, continuous injection for a long time will easily lead to fatigue, which will lead to injection errors, and even endanger the life of the patient in severe cases; when using a peristaltic pump for injection, its stability is guaranteed, but because the principle of the peristaltic pump is to push the medicine through the roller extrusion flexible tube liquid, the pressure will be limited, and the peristaltic pump will generate a pulse flow when it is in operation, which will affect the patient when the liquid is injected into the patient; at the same time, it is difficult to control the flow and flow rate of the peristaltic pump

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