SMT Sniff Magnitude Testing
For the Clinical evaluation of olfaction
in a wide variety of patients.

• Places minimal dependence on language, cognitive ability, memory, and odor naming ability.
• Differentiates between deficits caused by a loss of primary sensory input and those caused by higher-order processing associated with troposmia, phantosmia, and olfactory agnosia.
• Is not affected by deficits in memory or attention in older adults.
• Provides a quantified measure of olfactory function.

The SMT measures olfactory function not influenced by cognitive problems.

Sniff magnitude ratios are calculated as the ratio of average sniff magnitude (area under the sniff curve) to malodor, divided by the average sniff magnitude to a null odor. A pleasant odor canister is provided to evaluate possible anosmia to the malodor.