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  • 1
    ISSN: 1432-1238
    Keywords: Key words Brain injury ; Dopamine ; Hemodynamics ; Intracranial pressure ; Kidney function ; Norepinephrine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: To investigate the effects of low-dose dopamine (Dop) on renal hemodynamics and function in patients with brain trauma receiving norepinephrine (NE). Design: Prospective clinical study. Setting: Surgical intensive care unit of a university hospital. Patients: 20 stable, non-septic, mechanically ventilated, sedated patients with brain trauma and normal renal function treated with intravenous NE (0.11–0.65 μg/kg per min) to maintain an adequate cerebral perfusion pressure (〉 60 mm Hg). Interventions: Two successive 1-h study periods with NE alone then NE + Dop (2 μg/kg per min). During each period, creatinine (ClCREAT), sodium (ClNa), potassium (ClK), osmolar (ClOSM) and free water (ClH2 O), clearances were measured in all the patients. Effective renal blood flow (ERBF, paraaminohippurate clearance) and glomerular filtration rate (GFR, inulin clearance) were measured in 7 of the 20 patients. Results: Dop during NE infusion induced increases in urine flow and natriuresis which were not correlated with possible changes in arterial pressure. ClCREAT, GFR and their difference remained unchanged, whereas ERBF tended to increase. Fractional sodium excretion [100 × (ClNa/ClCREAT) ] and ClK increased during Dop infusion. Conclusion: The mechanism of Dop-induced natriuresis during NE infusion in brain trauma patients seems mainly related to a direct tubular effect of the drug.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1238
    Keywords: Key words Cefpirome ; Ciprofloxacin ; Pharmacokinetics ; Systemic inflammatory response syndrome ; Trauma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: To determine the pharmacokinetic parameters of cefpirome, a new so-called fourth-generation cephalosporin, in previously healthy trauma patients with posttraumatic systemic inflammatory response syndrome (SIRS) and to compare them to parameters obtained in matched, healthy volunteers. Design: A prospective study. Setting: 12-bed surgical intensive care unit in a university hospital. Patients: 9 severe [Injury Severity Score, median (range) 29 (16–50)] trauma patients on mechanical ventilation with proven or suspected cefpirome-susceptible nosocomial infection, with no renal or hepatic failure, and healthy volunteers matched for age ( ± 5 years), sex, and body surface area ( ± 10 %) were enrolled. All were men. Interventions: Cefpirome (2 g twice daily) was continuously infused over a 0.5 h period alone or concomitantly with ciprofloxacin (400 mg over 1 h, twice daily). Measurements and main results: Antibiotic concentrations in plasma were measured by high-performance liquid chromatography; their pharmacokinetic parameters were evaluated at 12 time points after the first drug administration using a noncompartmental model. Cefpirome pharmacokinetic parameters for the two groups were similar despite a wider variation for trauma patients. Specifically, the median (range) time during which the cefpirome concentration in plasma remained over 4 mg/l (corresponding to the French lower cutoff determining cefpirome susceptibility) was 9.5 (7– 〉 12) and 9 (8–12) h for trauma patients and healthy volunteers, respectively. In the group of five patients receiving combined antibiotic therapy, the interindividual variability of pharmacokinetics was wider for ciprofloxacin than for cefpirome. Conclusion: No major pharmacokinetic modification was noted when cefpirome was given to trauma patients with posttraumatic SIRS without significant organ failure, indicating that no dosage adjustment seems required in this population. However, larger studies including determination of antibiotic levels in tissues are warranted to confirm these results.
    Type of Medium: Electronic Resource
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