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Updated: Jun 29, 2025

Multiplex Therapeutic Drug Monitoring by Isotope-dilution HPLC-MS/MS of Antibiotics in Critical Illnesses
Published on: August 30, 2018
When to Stop Antibiotics in the Critically Ill?
Nathan D Nielsen1,2, James T Dean1, Elizabeth A Shald3
1Division of Pulmonary, Critical Care and Sleep Medicine, University of New Mexico School of Medicine, Albuquerque, NM 87131, USA.
Abstract:
Over the past century, antibiotic usage has skyrocketed in the treatment of critically ill patients. There have been increasing calls to establish guidelines for appropriate treatment and durations of antibiosis. Antibiotic treatment, even when appropriately tailored to the patient and infection, is not without cost. Short term risks-hepatic/renal dysfunction, intermediate effects-concomitant superinfections, and long-term risks-potentiating antimicrobial resistance (AMR), are all possible consequences of antimicrobial administration. These risks are increased by longer periods of treatment and unnecessarily broad treatment courses. Recently, the literature has focused on multiple strategies to determine the appropriate duration of antimicrobial therapy. Further, there is a clinical shift to multi-modal approaches to determine the most suitable timepoint at which to end an antibiotic course. An approach utilising biomarker assays and an inter-disciplinary team of pharmacists, nurses, physicians, and microbiologists appears to be the way forward to develop sound clinical decision-making surrounding antibiotic treatment.
Insights
Antibiotic stewardship is crucial for critically ill patients to minimize risks like antimicrobial resistance (AMR). A multi-modal approach using biomarkers and interdisciplinary teams can guide appropriate antibiotic duration.
Area of Science:
- Critical Care Medicine
- Infectious Diseases
- Pharmacology
Background:
- Antibiotic use has significantly increased in critically ill patients over the last century.
- Concerns are rising regarding appropriate antibiotic treatment guidelines and durations.
- Antibiotic administration carries short-term (hepatic/renal dysfunction), intermediate (superinfections), and long-term (antimicrobial resistance) risks, exacerbated by prolonged or broad-spectrum use.
Purpose of the Study:
- To review strategies for determining appropriate antimicrobial therapy duration.
- To highlight the clinical shift towards multi-modal approaches for optimizing antibiotic cessation.
- To propose an integrated approach for informed clinical decision-making in antibiotic treatment.
Main Methods:
- Literature review focusing on strategies for antimicrobial therapy duration.
- Analysis of the clinical trend towards multi-modal decision-making for antibiotic courses.
- Conceptualization of an approach integrating biomarker assays and interdisciplinary teams.
Main Results:
- Increasing focus on strategies to determine optimal antimicrobial therapy duration.
- Emerging clinical trend towards multi-modal strategies for antibiotic cessation.
- Identification of biomarker assays and interdisciplinary collaboration as key components for future decision-making.
Conclusions:
- Optimizing antibiotic duration is essential to mitigate treatment risks and combat antimicrobial resistance (AMR).
- A multi-modal approach, combining biomarker data with interdisciplinary team input (pharmacists, nurses, physicians, microbiologists), represents a promising strategy for evidence-based clinical decision-making in antibiotic therapy.
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