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Updated: Jun 11, 2025

Multiplex Therapeutic Drug Monitoring by Isotope-dilution HPLC-MS/MS of Antibiotics in Critical Illnesses
Published on: August 30, 2018
Risk Factors Associated with Antibiotic Exposure Variability in Critically Ill Patients: A Systematic Review
Laura Gras-Martín1,2,3, Adrián Plaza-Diaz1,2, Borja Zarate-Tamames1,2
1Pharmacy Department, Hospital de la Santa Creu i Sant Pau, Sant Antoni Maria Claret 167, 08025 Barcelona, Spain.
Critically ill patients often have antibiotic levels outside the therapeutic range due to pharmacokinetic variability. Renal function, weight, and age significantly impact antibiotic efficacy and safety in these patients.
Area of Science:
- Pharmacology
- Critical Care Medicine
- Clinical Pharmacy
Background:
- Antibiotic behavior in critically ill patients is increasingly studied.
- Many patients experience antibiotic levels outside the therapeutic range.
- Pharmacokinetic variability is a likely cause, but specific risk factors are unclear.
Purpose of the Study:
- To systematically review risk factors for pharmacokinetic alterations in critically ill patients.
- To identify factors compromising antibiotic treatment efficacy and safety.
Main Methods:
- Systematic review of literature.
- Searches conducted in PubMed, Web of Science, and Embase databases.
- Inclusion of observational studies and clinical trials.
Main Results:
- 246 observational studies and 10 clinical trials were identified.
- Most studied factors: renal function, weight, age, sex, renal replacement therapy.
- Factors with greatest impact: renal function, weight, renal replacement therapy, age, protein/albumin levels, APACHE/SAPS scores.
Conclusions:
- Identifies critically ill patients at higher risk of subtherapeutic antibiotic targets.
- Highlights numerous studied risk factors for future research.
- Emphasizes the need for continued research in real clinical practice with clinical outcomes.
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