Physical basis of the medical devices operation in the aspect of hydrodynamics
DOI:
https://doi.org/10.15587/1729-4061.2012.5557Keywords:
equipment, vacuum, hydrodynamics, pressure, medicine, principal scheme, nozzle, ejectionAbstract
The article represents the original hydraulic and composite schemes of the most commonly used medical devices and their description in terms of hydrodynamics. There is an examination of a medical syringe as manual hydraulic pump, the outlet of which is a complex resistance in the form of needle and tissues of the patient in the place of injection. Its defects and ways to improve the ergonomics were suggested. The scheme and peculiarities of the device for measuring blood pressure were described. The hydraulic scheme of the device for solutions infusion was suggested, and the principal features of its work were indicated. The efficiency of the ejection phenomenon in medical devices was considered. There is a diagram and description of the inhaler usage with an ejector nozzle for feeding and mixing of three fluid flows. There are the scheme and the peculiarities of operation of the artificial lung ventilation device powered by an oxygen cylinder with two special ejectors to create a high vacuum and oxygen respiratory mixtureReferences
- Емцев Б.Т. Техническая гидромеханика. – М.: Машиностроение, 1978.
- Седач В.В., Морокко И.И. Гидравлический расчет проточного тракта медицинского шприца. // Вісник НТУ «ХПІ» - Харків: НТУ «ХПІ». -2008.- №22.- С. 51 – 56.
- Седач В.В. Газовые эжекторы как источники вакуума в технике и медицине. // Вестник НТУ «ХПИ» - Харьков: НТУ «ХПИ». – 2002. -№9. - С. 75-78.
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