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Table 1 Tobramycin population pharmacokinetic parameter estimates

From: Tobramycin exposure from active calcium sulfate bone graft substitute

Population mean

Parameter

Estimate

s.e%b

CL (L h−1)

7.14d

--

V (L)

16.6

35

Ka (h-1)

0.0603

19

F (if cast 10 g)

0.63

19

F (if cast 20 g)

0.32

19

Interpatient variability

Parameter

CV% a

s.e% c

CL

--

--

V

89

74

ka

--

--

F

74

72

Residual variability

Error type

 

s.e%

σprop (CV%)e

29

50c

σadd (SD in mg/L)f

0.062

22b

  1. CL, mean apparent clearance; V, mean apparent volume of distribution; ka, mean absorption rate constant; F, mean bioavailability.
  2. aestimates of variability expressed as coefficient of variation (CV%).
  3. bs.e = standard error of the estimates (S.E), defined as S.E/estimate and expressed as percentage.
  4. cs.e = standard error of the coefficient of variations, taken as s . e estimate / estimate , expressed as a percentage.
  5. dequated to creatinine clearance (CLcr).
  6. eresidual variability in the plasma concentrations associated with the proportional error term, expressed as a coefficient of variation (CV%).
  7. fresidual variability in the plasma concentrations associated with the additive error term, expressed as a standard deviation (SD).