Minor test
Qualitative medical test for evaluation of sweating function From Wikipedia, the free encyclopedia
The Minor test (also known as Minor's test, the starch–iodine test, and the iodine–starch test), described by Victor Minor in 1928,[1] is a qualitative medical test that is used to evaluate sudomotor function (perspiration or sweating).[2]
| Minor test | |
|---|---|
| Purpose | for testing sudomotor function |
Method
Tincture of iodine is applied to the skin and allowed to air-dry. After drying, the area is dusted with cornstarch or potato flour. Sweating is then encouraged by increased room temperature, exercise, use of a sauna, or pilocarpine.[2]
When sweat reaches the surface of the skin, the starch and iodine combine, causing a drastic color change (yellow to dark blue), allowing sweat production to be easily seen.[2]
Some have reported higher sensitivity and fewer drawbacks marking dry skin with water-erasable ink and observing fading.[3]
Uses
The Minor test can be used as a diagnostic tool to evaluate underactive (hypohidrosis)[4] and overactive (hyperhidrosis) sweating. This test can also reveal Horner's syndrome.[2]
References
Notes
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