The ACE BUN/Urea Reagent is intended for the quantitative determination of blood urea nitrogen (BUN) concentration in serum and lithium heparin plasma using the ACE, ACE Alera and ACE Axcel Clinical Chemistry Systems. BUN measurements are used in the diagnosis and treatment of certain renal and metabolic diseases. This Objectives To explore the correlation between Blood urea nitrogen to creatinine ratio (BUN/Scr ratio) and prognosis of patients with chronic heart failure complicated with renal injury. Methods A retrospective analysis of 504 patients hospitalized in Guang 'anmen Hospital, Chinese Academy of Traditional Chinese Medicine from March 2006 to June 2014 was conducted. The baseline data were Urea is the final breakdown product of the amino acids found in proteins. Nitrogen in the form of ammonia is produced in the liver when protein is broken down. The nitrogen combines with other chemicals in the liver to form the waste product urea. The urea is released into the bloodstream and carried to the kidneys where it is filtered out of Urea (g/24 hs) x 0.0167 = Urea (mol/24 hs) To convert Urea values (in g/l) to BUN values (in mg/dl) a conversion factor must be used. 1 1000 Conversion factor = x = 46.7 2.14 10 where: 1/2.14 = conversion factor between urea and blood urea nitrogen (BUN) 1000 = conversion factor between gram and milligram 1/10= conversion factor between liter Blood Urea Nitrogen : BUN: B: 10: 20: 0: 1000: mg/dL: 0.3571: mmol/L: Urine Urea Nitrogen 1 Click on the links above to go to Parameter Unit Conversion Pages The blood urea nitrogen (BUN) concentration has been considered a less specific marker of kidney function than sCr, eCrCl, or eGFR. However, in addition to reflecting GFR, BUN may rise independent of changes in GFR or sCr owing to enhanced proximal tubular reabsorption under the activation of the sympathetic nervous and renin-angiotensin More importantly, Bland-Altman plots indicated that a minimal positive bias (mean ± SD) was observed: BUN (0.352 ± 0.289 mmol/L), Cr (2.702 ± 7.683 µmol/L), UA (5.398 ± 7.086 µmol/L). Conclusions: The Vitros5600 and Hitachi7600 systems have good correlation and bias for detecting BUN, Cr, and UA analytes. The two systems have a high Analysis of 24 hour urine: Please enter data SexMaleFemale Age (years) Weight (kg) Height (cm) Volume Urine creat (g/specimen) Urine urea (g/specimen) Time BUN Serum creatinine Calculate Measured Clearance CrCl ml/min CrCl ml/min/1.73 m2 Urea Cl ml/min … qz5fL.