Development Of The Medical Oxygen Inspiration Device With Controllable Oxygen Concentration

The modern medical apparatus changes with each passing day, new technology, new method of medical emerge in an endless stream. Oxygen intake treatment which is most extensive and general used in clinical first aid, support treatment and even family health care is still adopt traditional technology, present oxygen intake treatment, except serious disease and have conditions to use top-grade ventilator which can control of oxygen intake density, adopt simple method which uses high pressure oxygen source through humidifier bottle to reduce pressure and after oxygen of higher density for patient to suck. Because of the restriction of the technological method, the concrete density of the oxygen that the patient sucks in the internal gas is unable to control quantitatively by health care workers.Present oxygen intake technical level is unsuitable for serious and regulatory requirement for clinical medical treatment, medical personnel subjective judgment or operate difference and patient that yardstick know cooperate with the difference of the intensity, which can lead the patient suck internal gas's real oxygen density more different from the expectation of doctor.The project of development of the medical oxygen inspiration service with controllable oxygen concentration, which is based on most hospital's three gases supply at present, on the basis of fully considering the cost of goods, build on the electronic and electrical technology, can realize the mixing of oxygen and air in free proportion exactly and can be widely used in quota control of the oxygen consumption in the clinical application.Completed the works as followed:1, Set up air-oxygen pressure balancing deviceThe theoretical foundation of device is Boyle's law which describes the inversely proportional relationship between the absolute pressure and volume of a gas, if the temperature is kept constant within a closed system.2, Set up the air-oxygen mixing deviceThe one-chip computer AT89S51 is used to control the Stepping Motor, which is used to control the flow of two gases, to reach the oxygen density of 21%-100% of the arbitrary proportions.3, Oxygen concentration and other parameters to achieve the functions of adjustment and displayIt can realize the oxygen mixture on the output adjustment and digital display of oxygen concentration by using one-chip computer AT89S51.Innovations in this study as followed:1, Fully based on the actual hospital, strongly reduce the production cost2, The completion of the oxygen concentration of 21% -100% adjustable, precision±3%, to meet the clinical criteria.3, The equipment noise, accuracy, security and reliability to meet the requirements for clinical use.