A modeling study explored reducing blood collection during metabolic phenotyping. Its equations were developed in a small, controlled cohort rather than arbitrary forensic specimens.
The model development
Data from sixteen healthy adults receiving a low-dose probe cocktail were analyzed using regression and jackknife procedures. For midazolam, two-sample models achieved the reported high agreement with twelve-hour exposure estimates.
Some other probe metrics could use one sample. Adding a third sample produced relatively small additional gains for selected models.
Timed sampling is essential
These were scheduled measurements after known administration, not isolated concentrations obtained at an unknown time. Correlation with the study’s reference estimate does not establish validity in every population or dosing circumstance.
The paper cannot supply a universal conversion from one casework concentration to total dose or impairment. A forensic summary should retain the model, dose scale, sampling times, population, and prediction uncertainty. Reducing collection burden in a phenotyping experiment is different from reconstructing an unknown exposure.
Source paper
Original analysis of the supplied journal article, identified as PMC7057125.
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