12. Loeb M, et al. Development of minimum criteria for the initiation of antibiotics in residents of long term care facilities: results of a consensus conference. Infect Control Hosp Epidemiol. 2001;22(2):120-124.
Normal results vary based on the method and activators used. Normal APTT results are usually between 25-40 seconds; PTT results are between 60-70 seconds.APTT results for a patient on heparin should be 1.5-2.5 times normal values.An APTT longer than 100 seconds indicates spontaneous bleeding.artial thromboplastin time (PTT), a test for detecting coagulation defects of the intrinsic system by adding activated partial thromboplastin to a sample of test plasma and to a control sample of normal plasma. The time required for the formation of a clot in test plasma is compared with that in the normal plasma.
Normal values for the panel tests are: 1  Albumin: 3.4 to 5.4 g/dL (34 to 54 g/L) 2  Alkaline phosphatase: 44 to 147 IU/L (0.73 to 2.45 Âµkat/L) 3  ALT (alanine aminotransferase): 7 to 40 IU/L (0.12 to 0.67 Âµkat/L) 4  AST (aspartate aminotransferase): 10 to 34 IU/L (0.17 to 0.57 Âµkat/L) 5  BUN (blood urea nitrogen): 6 to 20 mg/dL (2.14 to 7.14 mmol/L)