인체 휴대용 지능화적인 의용 링거기기의 연구

Abstract

Using the portable intelligent transfusion equipments the patient can walk freely during the transfusion, which eliminates the discomfort as a result of longtime staying on the seat and avoids the troubles in the traditional transfusion。It can be used simply, conveniently and reliably so that the waste of human resources will be decreased greatly. The accuracy of transfusion capacity and speed can be controlled. When there are some accidental situations during the transfusion, the equipment can stop the transfusion immediately in order to prevent the accident. It can also help the nurse to work easily; and make the transfusion much safer, more accurate and more efficient. This paper analyzes the advantage and disadvantage of common medical transfusion pumps and the main reasons which cause the pulse during the transfusion. A new type transfusion pump has been designed, and the feasibility of the design are proved available. It is clear that the transfusion pumps which consist of rotary dishes can help to weaken the pulses, and to control the transfusion more accurately. The design also gives the details of all the parts of the new type transfusion pump. In order to reduce the whole volume, the PCB board integrates stepper motor drive circuit, keyset, alarm circuit and LCD. Hardware circuit adopts C8051F005 singlechip as key part, and uses integrated monolithic chip L297 and L298 to realize chopper drive of stepper motor. And achieves the control of the transfusion rate and quantum through controlling the rotate speed and number of the step motor by keyset. The rubber joint between stepper motor and transfer pump can minish pulsation caused by the shake of the motor when transfusing. From the studies of the methods of photoemission, capacitance and ultrasonic to detect the air in the transfusion pipe, the best way to detect the air is the use of ultrasonic. According to the principle of ultrasonic detecting method, the ultrasonic air detector has been designed: The measures of increasing the detecting sensitivity and improving the detecting precision have also been expounded and demonstrated. The paper also finds out the primary factors of the influence on the transfusion precision, and discusses the methods of its improvability. After the analysis of the reliability and security of the transfusion system, some certain measures have been taken to make the system more reliable and safer.