We sometimes find someone who
thinks so much like us, that they say, they are a man or woman after my own
heart.
Happily, I found one.
I was having a discussion with a nurse who said that one cc (cubic
centimeter) was exactly the same thing as one mL (milliliter). I told her
that 1) mL is the preferred term of art, and that 2) they are not exactly
the same.
She did not agree. So, as
Dr. John usually does, I used other sources to prove up my case !
Point 1...mL preferred to use rather than cc
in medicine
http://64.233.169.132/search?q=cache:ABQkwl-VHq4J:www.ms-information.org/medical/formulary
There is shown a table indicating 12.6 percent of prescribing errors are the
result of using "cc" when "mL" is proper.
http://en.wikipedia.org/wiki/Cubic_centimeter
There is currently a movement within the medical field to discontinue the
use of "cc" in prescriptions and on medical documents as it can be mis-read
as "00" if poor handwriting is used, which can result in a massive, even
lethal, overdose of medication. In the United States, confusion resulting
from using "cc" to mean "mL" accounts for 12.6% of all errors associated
with medical abbreviations.[1]
While "cc" is not officially prohibited per the
Joint Commission's "Do Not Use" list of prohibited abbreviations,[2]
it is on the list as a candidate for possible inclusion on future lists,
with "ml" or "milliliters" as suggested replacements.
The mass of one cubic centimetre of water at 3.98 °C (the temperature at which it attains its maximal density) is equal to 1 gram.
Point 2, cc is not the
exact same thing as mL (cubic centimeter is not the same exactly as
millilitre)
Source 1
http://64.233.169.132/
Under the "Prohibited Abbreviation" section
http://www.funtrivia.com/askft/Question46602.html
|
sequoianoir |
Unfortunately, 1ml does not equal 1cc. There is a difference when
you go to 5 decimal places. The metric system has it roots in Paris in 1793. In addition to decimal system proposals, units of length, mass and volume were provisionally created. (A brass standard of the provisional metre was made: it is preserved in the Conservatoire des Arts et Mιtiers, Paris.) This was when the LITRE was first defined as a measure for liquids, this being an appropriately sized volume for commercial use. As the 19th century drew to a close, very precise measurements were needed in the fields of Physics, Chemistry and engineering. In 1889 the "Standard Kilogramme" was created. This was supposed to be the same as 1 litre of distilled water at its maximum density -ie. at a temperature of 4 degrees celsius. The LITRE then became officially defined as 1 kilogramme of pure water at 4°C. Unfortunately there was a very small error and it was not until 1907 that it was detected. The "1889 Standard kilogramme" was discovered to have a mass of 1000.028 cc of pure water at 4°C and so it followed that a LITRE was 1000.028 cc. A decision was taken to leave the kilogramme as the "Standard" but to divide the LITRE into 1000 equal parts and to call this division by a new name the millilitre (ml). From 1907 millilitres were used as the standard unit of liquid and volume measurement. So 1 millilitre then equalled 1.000028 cc and 1 cc equalled 0.999972 ml. Accordingly 1 millilitre of pure water at 4°C had a mass of 1 gramme Apr 21 04, 4:32 PM |
|
sequoianoir |
In 1964 the General Conference of Weights and Measurements
re-defined the LITRE as a true measurement of volume and so equal
to 1000 centimetres cubed (cm3 or cc). This changed the specification of
the litre, by the fact that its new definition is directly related to
the metre as a measurement of volume and no longer to the kilogramme. However, the millilitre remained as per the original specification and the ml calibration of scientific vessels used in very accurate analytical work is not 1/1000th of a litre where a litre = 1000cc, but where 1ml of pure water at 4°C has a mass of 1 gramme. So 1ml does not equal 1cc Apr 21 04, 4:33 PM |
Source 2
http://www.blurtit.com/q980432.html
"For
practical purposes, they are equivalent, but not exact. 1000 ml is exactly 1
liter. 1000cc's is not exactly 1
liter. "
Labels: cc, cubic centimeters not the same as millilitres, ml, not the same
MORE BLOGS FROM BAKER CHIROPRACTIC,PA
Keywords = millimeter, mL , centimeter, cc ,
medical errors, prohibited,
forbidden, abbreviations, 12.6 percent, do not use, not interchangeable,
eschew use of cc,
medical abbreviations , practical, mL is preferred term