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Clinical Trial Summary

The study hypothesis is to measure how the drug doripenem is cleared from the body of critically ill trauma patients. The investigators will measure blood drug concentrations and calculate how much the drug distributes in the body and how fast it is removed from the body. There is little information on how drugs are cleared in critically ill patients and the wrong dose of a drug could make it ineffective. The investigators will use this information to predict the most reasonable dose to treat infections effectively in these patients.


Clinical Trial Description

Understanding the pharmacokinetic (PK)/pharmacodynamic (PD) characteristics of an antibiotic can provide insight into developing appropriate dosing regimens. It is even more imperative at the present time to maximize PK/PD parameters since there are no new novel antimicrobial agents to treat resistant gram-negative infections. This approach allows us to achieve superior PD parameters and treat bacteria that would have been resistant to standard dosing due to higher minimum inhibitory concentrations (MICs).

Doripenem exhibits time-dependent bactericidal activity and the pharmacodynamic parameter predicting clinical and bacteriologic outcomes is the percentage of the dosing interval that free drug concentrations remain above the minimum inhibitory concentration (T > MIC) of the infecting pathogen Sepsis is known to influence drug pharmacokinetics and pharmacodynamics as a result of changes in hemodynamics, capillary permeability, third spacing, acid-base status, serum proteins, and organ function. Moreover, trauma patients tend to be younger with fewer comorbidities. They are hypermetabolic and are often given aggressive fluid resuscitation resulting in increased renal clearance of drugs and a larger volume of distribution. As a consequence of these differences in PK parameters, the calculated PD parameters will likely differ resulting in sub-optimal T> MIC. For time-dependent antibacterial agents such as doripenem, the T > MIC is one of the most important pharmacodynamic parameters in predicting clinical efficacy, therefore it is imperative to evaluate the PK parameters in this particular population. ;


Study Design

Endpoint Classification: Pharmacokinetics/Dynamics Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment


Related Conditions & MeSH terms


NCT number NCT01027897
Study type Interventional
Source Emory University
Contact
Status Completed
Phase Phase 4
Start date April 2010
Completion date December 2011

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