ICU Patients Clinical Trial
Official title:
Reliable Methods to Assess Kidney Function for Drug Dosage Adjustments in Critically Ill Patients - Comparison of Timed Clearance of Creatinine and Creatinine Based Estimated GFR
The aim of the study is to determine if colistin dosage adjustment using 4hr CrCl contribute to better clinical outcomes compared with drug dosage adjustment using eGFR in critical ill patients. In control group, colistin maintenance dosage will be decided using serum creatinine based eGFR (in ml/min). In study group, colistin maintenance dosage will be decided using 4hr CrCl.
1. Screening periods (From 'informed consents' to 'randomization')
- Check of inclusion/exclusion criteria ② Measurement of 4hr CrCl & eGFR in ml/min
- calculation of maintenance dose ③ Baseline characteristics & laboratory
findings ④ Randomization
2. Colistin dosage Loading dose : 5 x body weight (not exceeding 300mg) Maintenance dose
(after 12 hours from loading dose)
: 2.5 x ([1.5 x GFR] + 30) (divided doses every 12hours), GFR in ml/min
During the study period, daily morning serm creatinine levels are measured. Whenever
serum creatinine concentration changes by more than 10% compared with baseline, 4hr
CrCl will be mearued. At the every time of 4hr CrCl measurements, colistin dose wil be
modified according to new GFR values (4hr CrCl in study group, eGFR in control group)
3. Blood sampling for Colistin trough level measurement Peripheral blood will be sampled
twice between 72 hrs and 144 hours after loading dose, just before colistin infusion.
The samples were collected in heparined tubes and centrifuged at 4 °C within 1 hr of
collection. The resulting plasma was stored at - 70°C . And two values will be averaged
out.
4. End of randomization (7 days after colistin initiation) ① Nephrotoxicity ② Treatment
outcome microbiological outcome: eradication / no eradication clinical outcome:
complete response / partial response / treatment failure
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