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Serum antibiotic concentrations pre- and postcardiopulmonary bypass
Antimicrobial Agents and Chemotherapy
|September 1, 1973
Summary
Conventional antibiotic doses like cephalothin and kanamycin failed to maintain therapeutic serum levels in pediatric patients undergoing cardiopulmonary bypass. Adults required timely administration for adequate antibiotic concentrations, impacting infection prevention strategies.
Area of Science:
- Pharmacology
- Cardiovascular Surgery
- Infectious Disease
Background:
- Antibiotic prophylaxis is crucial in patients undergoing cardiopulmonary bypass (CPB) to prevent surgical site infections.
- Maintaining adequate serum antibiotic concentrations is essential for efficacy against potential pathogens.
Purpose of the Study:
- To determine serum concentrations of cephalothin and/or kanamycin in patients undergoing CPB.
- To assess the adequacy of conventional antibiotic dosing in achieving therapeutic levels during CPB.
Main Methods:
- Serum antibiotic levels were measured in 53 patients (pediatric and adult) during CPB.
- Cephalothin and kanamycin were the antibiotics studied.
- Concentrations were compared against minimum inhibitory concentrations (MICs).
Main Results:
- Pediatric patients did not achieve adequate serum concentrations with conventional doses.
- Adults achieved adequate concentrations only when antibiotics were given within 4 hours of CPB initiation.
- No cases of infectious endocarditis were observed in the 4-month postoperative follow-up.
Conclusions:
- Conventional antibiotic dosing regimens may be insufficient for pediatric patients during CPB.
- Optimized timing of antibiotic administration is critical for achieving therapeutic levels in adults undergoing CPB.
- Further studies are needed to evaluate the clinical impact on infectious endocarditis rates.