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General Physics and Mechanics 

General Physics and Mechanics
Chapter:
General Physics and Mechanics
Author(s):

David O. Joseph

and George W. Williams

DOI:
10.1093/med/9780199381623.003.0003
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date: 18 August 2019

This chapter explains certain basic scientific concepts of gases and liquids in order to understand how carrier gases are stored and used on our modern anesthesia machines. It reviews vapor pressure and gas pressure measurements as applied to anesthesia delivery. Other topics covered include viscosity, density, laminar versus turbulent flow, and flowmeters. There is further discussion on concepts relating to gas delivery systems, pressure regulation systems, and transducers that are used for invasive measurements of blood pressure, central venous pressure, and pulmonary arterial pressure. Pipeline gas supply and cylinder gas supply are also reviewed. In addition, certain safety features incorporated into anesthesia machines to prevent accidental delivery of the wrong gas are reviewed as well. The final topic is Doppler ultrasound.

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