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  • Title: Central venous catheters versus peripheral veins for sampling blood levels of commonly used drugs.
    Author: Shulman RJ, Ou C, Reed T, Gardner P.
    Journal: JPEN J Parenter Enteral Nutr; 1998; 22(4):234-7. PubMed ID: 9661125.
    Abstract:
    BACKGROUND: Our objective was to compare the accuracy of drug levels in blood samples obtained from central venous catheters with those from peripheral blood samples taken to monitor various drug levels. METHODS: Pediatric patients with central venous catheters receiving aminoglycosides, vancomycin, or cyclosporine had central and peripheral blood samples obtained within 5 minutes of each other and analyzed simultaneously. We ascertained how well blood levels from central venous catheters compared with those from peripheral blood (the criterion standard). RESULTS: There were no clinically significant differences between central and peripheral values for amikacin, gentamicin, tobramycin, and vancomycin (both peaks and troughs). Preliminary data indicated that oral cyclosporine can be monitored via central venous catheter. In contrast, there was poor agreement between peripheral and central values when cyclosporine was administered by IV. CONCLUSIONS: Amikacin, gentamicin, tobramycin, vancomycin, and probably oral cyclosporine can be monitored accurately via central venous catheter. In contrast, IV cyclosporine should be monitored via peripheral blood.
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