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Table 3 Aminoglycoside therapy characteristics

From: An international survey on aminoglycoside practices in critically ill patients: the AMINO III study

 

All (n = 931)

Amikacin (n = 614)

Gentamicin (n = 303)

Tobramycin (n = 14)

Duration of therapy (days)

2 [1; 3]

2 [1; 3]

2 [1; 3]

2 [2; 4.75]

Number of injections

2 [1; 2]

2 [1; 2]

2 [1; 2]

2 [1; 4]

Second dose administered

483 (52%)

326 (53%)

164 (53%)

13 (93%)

First dose in mg

–

2000 [1500; 2250]

440 [320; 560]

500 [381; 555]

First dose in mg per kg of TBW

–

26 [21.9; 29.4]

5.6 [4.3; 7.5]

6 [5.1; 7.1]

First dose in mg per kg of ABW

–

267.8 [23.8; 29.4]

6.2 [4.8; 7.8]

6.1[5.4; 7.1]

Infusion duration (min)

30 [30; 30]

30 [30; 30]

30 [30; 30]

30 [30; 30]

Cmax after first dose

437/931 (47%)

341/614 (56%)

90/303 (30%)

6/14 (43%)

Cmax value (mg L−1)

–

73 [57; 90]

21 [17; 25]

19 [14; 26]

Delay end of infusion and Cmax sampling (min)

30 [30; 50]

30 [30; 50]

30 [30; 44]

30 [26; 37]

Targeted Cmax attainment after first dose

295/437 (68%)

241/341 (71%)

53/90 (59%)

1/6 (17%)

Cmin after first dose

501/880 (57%)

347/577 (60%)

145/289 (50%)

6/14 (43%)

Cmin above threshold

353/498 (71%)

230/347 (66%)

118/145 (81%)

5/6 (83%)

Time from first dose to Cmin (h)

22.9 [20.4; 24]

22.6 [20.5; 24]

23.4 [21.5; 24.1]

24.4 [23.6; 26.1]

Interval after first dose (h)

26 [23; 43]

26.7 [23; 45]

24.8 [23; 34]

24.5 [23; 29]

  1. For continuous variables, mean ± standard deviation or median [interquartile range] are given. For categorical variables, numbers (%) are given. The ABW was calculated as follow: IBW + 0.4 x (TBW-IBW). The Cmax attainment is defined as a Cmax above 20 mg L−1 for gentamicin and tobramycin or above 60 mg L−1 for amikacin. The Cmin thresholds considered are 0.5 mg L−1 for gentamicin and tobramycin and 2.5 mg L−1 for amikacin
  2. Cmax: maximal concentration; Cmin: minimal concentration; ABW: adjusted body weight, TBW: total body weight; IBW: ideal body weight