Fentanyl Concentrations
  Liver (μg/kg) (ng/mL) PB L/P Ratio
N 87 87 87
Min 6.9 2.6 1.00
Max 689 246 42.30
Mean 93.33 17.93 6.50
Median 66 12 5.36
    Standard Deviation 3.02
L = Liver, PB = Peripheral Blood, L/P = Liver/Peripheral Blood
Table 7: Summary of 87 fentanyl positive cases from the Los Angeles County Department of Coroner (L/P Ratios).