Tissue concentrations: do we ever learn?
Over the last decades, numerous papers have appeared--and still are appearing--that describe concentrations in tissues in an effort to predict the efficacy of an antimicrobial agent based on these concentrations and MICs for microorganisms. A common method is to use measurements of concentrations in tissue homogenates, comparing these with values derived from the corresponding blood samples and on that basis draw conclusions with respect to the potential clinical use of the drug. This approach is not justifiable for a number of reasons that includes both pharmacokinetic as well as pharmacodynamic causes. This way of presenting data with the derived conclusions is often misleading and may ultimately be harmful in patient care.
Department of Medical Microbiology and Infectious Diseases, Canisius Wilhelmina Ziekenhuis, Nijmegen, The Netherlands. mouton@cwz.nl
Johan W
JW
Mouton
Ursula
U
Theuretzbacher
William A
WA
Craig
Paul M
PM
Tulkens
Hartmut
H
Derendorf
Otto
O
Cars
D000900:Anti-Bacterial Agents / Q000378:metabolism; D006801:Humans; D007858:Learning; D008826:Microbial Sensitivity Tests / Q000379:methods; D014018:Tissue Distribution / Q000502:physiology*
D000900:Anti-Bacterial Agents