Medical Definition of Saline

  • Medical Author:
    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

Saline: Relating to salt. As an adjective, "saline" means "salty, containing salt." As a noun "saline" is a salt solution, often adjusted to the normal salinity of the human body.

Salt, in medicine, is referring to sodium chloride. Sodium chloride is common table salt and the salt concentrated in the earth and in sea water.

Certain concentrations of both sodium and chloride in the blood are essential for normal body functions. Saline solutions are commonly used in medicine as fluid replacements to treat or prevent dehydration.

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Reviewed on 12/11/2018

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