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From: Robert Swotinsky MD
Password: orange
Date: 23 Apr 2008
Time: 09:26:41 -0700
Remote Name: 68.184.42.162
How sad.
Yes, chiral analysis can be performed on oral fluid and should be performed in the case described in this thread. Unfortunately, the lab does not have sufficient specimen to complete the analysis; thus, the MRO should report the result as cancelled.
This case illustrates a shortcoming of testing with alternative specimens. While we're assured a collector will submit at least 30 mL for a single specimen, which is more than enough urine to perform chiral analysis and other add-on tests, we don't have this same assurance for hair and oral fluid. In my experience, it's probably more common (relative to urine) for the hair or oral fluid lab to report back to the MRO that there is not enough specimen left for d & l isomers, or to have an aliquot sent to a second lab for repeat assays, when these add-on tests are requested.