ABSTRACT
This article describes key concepts for drug dosing considerations in liver disease. Included in this article is a review of pharmacokinetic changes that are known to occur in patients with liver disease that can aide in drug dosing. Although limited, the currently available pharmacokinetic data for medications that are commonly used in the critical care setting are also included.
Subject(s)
Analgesics/pharmacology , Anticoagulants/pharmacology , Anticonvulsants/pharmacology , Cardiovascular Agents/pharmacology , End Stage Liver Disease/physiopathology , Liver Failure, Acute/physiopathology , Analgesics/metabolism , Anti-Infective Agents/metabolism , Anti-Infective Agents/pharmacology , Anticoagulants/metabolism , Anticonvulsants/metabolism , Antiemetics/administration & dosage , Antiemetics/metabolism , Cardiovascular Agents/metabolism , Histamine H2 Antagonists/metabolism , Histamine H2 Antagonists/pharmacology , Humans , Proton Pump Inhibitors/metabolism , Proton Pump Inhibitors/pharmacologyABSTRACT
PURPOSE: Current guidelines provide weak recommendations for starting enteral nutrition (EN) in patients with septic shock (on vasopressor support). Outcomes of patients receiving EN in septic shock on vasopressor support have not been well studied. We hypothesize that early trophic EN in mechanically ventilated patients with septic shock is associated with improved outcomes. METHODS: Single-center retrospective study of mechanically ventilated patients admitted with septic shock to identify patients receiving (1) no EN, (2) <600 kcal/d within 48 hours, and (3) ≥600 kcal/d within 48 hours. Outcomes studied included in-hospital mortality, length of intensive care unit stay (LOS), duration of mechanical ventilation (DOMV), and complications of feeding intolerance. RESULTS: Sixty-six patients were identified. In all, 15 received no EN, 37 received <600 kcal/d, and 14 received ≥600 kcal/d EN daily. Median LOS was 12, 5, and 13 days, respectively. The LOS was lower in patients receiving <600 kcal/d when compared to either no EN (P < .001) or those receiving ≥600 kcal/d (P < .001). Median DOMV was lower in patients receiving <600 kcal/d (median 3, P < .001) as compared to no EN (median 7, P < .001) or those receiving ≥600 kcal/d (median 7.5, P < .001). Mortality was not different. There were no significant complications among groups. CONCLUSION: In patients with septic shock, those receiving <600 kcal/d EN within 48 hours had lower DOMV and LOS when compared to those who did not receive EN or those who received ≥600 kcal/d. These observations provide strong justification for prospective evaluation of the effect of early trophic EN in patients with septic shock.
