Dear Pat:  It is easy to Google and get the wrong ratio, as you found.  What
many people don't realize is that computing normal saline is a matter of
determining exactly how much salt in how much water approximates the same
ratio in the human body.  When people give a range, it is because they are
guessing.  There is no range of values for normal saline because we would
not tolerate wide swings in salinity in our bloodstream (the model for
physiological saline)--we don't double or halve the salinity in our bodies.

Here again is the correct ratio:  1 level (measuring) teaspoon water to 2
cups (same as one pint) warm water.

I know it's confusing to read (and hear) the wrong ratios all the time, but
perhaps this will help.

For further explanation, see Taber's Medical Cyclopedia or an advanced
medical biochemistry textbook.

Arly Helm, MS, IBCLC

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