xRead - Olfactory Disorders (September 2023)

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INTERNATIONAL CONSENSUS ON OLFACTION

TABLE VIII.8 Olfactory tests with administration times > 20minutes

Normative data available

Commercially available

Test name and author/s 9-Odor Ascending Threshold Test Proetz, 1924 1190

No. of odors items 9 with multiple dilutions

Reliability coefficent

Comments

Test type

DT RT

NR

No

No

Employed multiple concentrations of each of 9 odorants selected on the basis of chemical makeup, low trigeminal impact, and dynamic range in ascending nonforced-choice log-based threshold series Rack designed to accommodate 100 bottles arranged in 10 rows making upa square Sniff bottle and mineral oil dilutions of each of 3 odorants presented in a counterbalanced fashion with each threshold being obtained 6 times for each odorant by 24 patients Blanks only used as comparison if patient not sure of sensation Descending method of limits for pyridine and thiophene concentrations in both oil andwater A given forced-choice trial presented 3 stimuli, 1 odorant + carrier solution and carrier solution alone 13 concentrations employed Threshold defined as lowest concentration in which 2 successive correct responses occurred while 2 consecutive incorrect responses occurred at next lower concentration Medians and ranges presented for 41 normal volunteers aged 6 to 59 years Pyridine values at major variance from the Amoore Threshold Test 1192 Demonstrated that short-term memory for odorants is associated with the number of response alternatives but that performance with retention intervals up to 30 seconds is unimpaired Among the first to provide a test of short-term odor memory

Jones’ Ascending Series Threshold Tests Jones, 1955 1191

RT

3 with 23 step

n-Butanol: 0.82 Safrol: 0.77 n-Butyric acid: 0.80

No

No

dilutions each

Henkin Olfactory Threshold Test Henkin and Bartter, 1966 461

DT

2

NR

Limited No

Short-Term Odor Memory Tests Engen et al, 1973 1193

OM 25 but different for individual patients

NR

No

No

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