Pathology The Royal New End Hosp MECHANICAL ROTARY DEVICE FOR PLATI]

The urea nitrogen assay strips, Urastrat, r Warner Chilcott, are a valuable time save pathology laboratory. However, I would 1i laboratory workers ' attention to three sei pancies encountered using the Urastrat s estimating urea nitrogen in patients suf multiple myeloma. In each case the urea est urease phenol hypochloride method was i 200 mg/100 ml. The Urastrat method in ea urea values of less than 60 mg/100 ml. These are of interest and concern, for it may well condition appreciably altering the serum prc or the serum viscosity could also give inc