urea constant

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urea constant

An obsolete estimate of renal function based on the simple calculation (Ambard’s formula) of urea in blood and urine (not based on the concept of renal clearance).
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Doug Haugh, President, Mansfield Oil Company, a national DEF supplier, said: “It is important, as volumes increase, that we do not rely on a NOLA [New Orleans, LA] urea index that does not represent the costs involved in the DEF business and therefore leaves both buyers and sellers exposed to unnecessary risk”.