Urea or creatinine ratio test

UREA OR CREATININE RATIO TEST

DESCRIPTION – the BUN/ creatinine ratio blood test is used to diagnose acute or chronic renal disease or damage. It may also be used to determine gastrointestinal bleeding or trauma. BUN and creatinine are both filtered in the kidneys and excreted in urine

METHODOLOGY – quantitative immunoturbidimetry

TURN AROUND TIME – within 24 hours

PATIENT PREPARATION –

COLLECT – 24-hour urine. Refrigerated during collection

SPECIMEN PREPARATION – transfer 1 ml of aliquot of urine from a well-mixed collection of transport tube

STORAGE/TRANSPORT TEMPERATURE – refrigerated

STABILITY – ambient: 1 week; refrigerated: 1 month; frozen: 6 month

SPECIAL INSTRUCTIONS – clinical history is mandatory