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Research ArticleSymposium Papers

The History and Physics of Heliox

Dean R Hess, James B Fink, Shekhar T Venkataraman, IN K Kim, Timothy R Myers and Benoit D Tano
Respiratory Care June 2006, 51 (6) 608-612;
Dean R Hess
Department of Respiratory Care, Massachusetts General Hospital, and Harvard Medical School, Boston, Massachusetts.
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  • For correspondence: [email protected]
James B Fink
Nektar Therapeutics, Mountain View, California.
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Shekhar T Venkataraman
Pediatric Intensive Care Unit, Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania.
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IN K Kim
Division of Pediatric Emergency Medicine, Kosair Children's Hospital, Louisville, Kentucky.
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Timothy R Myers
Asthma Center, Rainbow Babies and Children's Hospital, Cleveland, Ohio.
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Benoit D Tano
Johns Hopkins Medical Institution, Baltimore, Maryland.
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Abstract

Since the discovery of helium in 1868, it has found numerous applications in industry and medicine. Its low density makes helium potentially valuable in respiratory care applications, to reduce work of breathing, improve distribution of ventilation, reduce minute volume requirement, and improve aerosol delivery. This review includes a brief history of the use of heliox (a mixture of helium and oxygen) and addresses issues related to the physics of gas flow when heliox is used. Specifically covered are the Hagen-Poiseuille equation, laminar versus turbulent flow, the Reynolds number, orifice flow, Bernoulli's principle, Graham's law, wave speed, and thermal conductivity.

  • density
  • heliox
  • helium
  • thermal conductivity
  • viscosity

Footnotes

  • Correspondence: Dean R Hess PhD RRT FAARC, Respiratory Care, Ellison 401, Massachusetts General Hospital, 55 Fruit Street, Boston MA 02114. E-mail: dhess{at}partners.org.
  • Copyright © 2006 by Daedalus Enterprises Inc.
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Respiratory Care: 51 (6)
Respiratory Care
Vol. 51, Issue 6
1 Jun 2006
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The History and Physics of Heliox
Dean R Hess, James B Fink, Shekhar T Venkataraman, IN K Kim, Timothy R Myers, Benoit D Tano
Respiratory Care Jun 2006, 51 (6) 608-612;

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The History and Physics of Heliox
Dean R Hess, James B Fink, Shekhar T Venkataraman, IN K Kim, Timothy R Myers, Benoit D Tano
Respiratory Care Jun 2006, 51 (6) 608-612;
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  • density
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  • helium
  • thermal conductivity
  • viscosity

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