Successful use of a diagnostic toxicology laboratory requires a comple
te understanding of the case in question. Different types of evidence
must be integrated, including a thorough clinical and environmental hi
story, observation of clinical signs, necropsy results, analytic chemi
stry findings, and occasionally, bioassay. The history and clinical/pa
thologic findings will help identify the source of the toxicant, affec
ted organ systems, and a list of rule-outs. If a systematic approach i
s accomplished by proper sample management, the practitioner will opti
mize the ability to handle complex poisoning cases in a successful and
professionally rewarding manner.