| urea nitrogen a. |
the amount of urea in grams produced by a person's body over a specific period of time, closely related to the amount of nitrogen that has not been absorbed by the body. It is calculated as the sum of the urea excreted in the urine plus that found in the blood by calculating blood urea nitrogen. A low figure indicates efficient use of dietary protein. The person's intake of protein must also be known, because a low urea nitrogen appearance is also seen with a low protein diet or malnutrition.
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| urea p. |
poisoning of ruminants by excessive consumption of urea, leading to hyperammonemia with tremors, incoordination, dyspnea, convulsions, and sometimes death.
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| urea r. |
a sudden increase in release of urea into the bloodstream by cells and organs that normally store it, seen in the first 15 minutes to an hour after urea has been removed by dialysis; this is caused by flow-volume dysequilibrium.
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| urea reduction r. |
the fractional reduction in blood urea nitrogen during a single hemodialysis session, expressed as a per cent, measured to assess adequacy of hemodialysis.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| urea t. |
see specific tests, including Benedict's t. (def. 2), diacetyl t., Schroeder's t., and urease t. (def. 1). See also urea, methods for, under method.
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