Minor test

Minor test
Purposetest sudomotor function

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).

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.

When sweat reaches the surface of the skin, the starch and iodine combine, causing a dramatic color change (yellow → dark blue), allowing sweat production to be easily visualized.

Some have reported higher sensitivity and fewer drawbacks marking dry skin with water-erasable ink and observing fading.[2]

Uses

The Minor test can be used as a diagnostic tool to evaluate underactive (hypohidrosis)[3] and overactive (hyperhidrosis) sweating. Can visualize Horner's syndrome.

References

  1. ↑ Minor, Victor. "Ein neues Verfahren zu der klinischen Untersuchung der Schweissabsonderung", Dtsch Z Nervenheilkd, 1928;101302-7.
  2. ↑ Sweat Test with Water-erasable Ink, Letters to the Editor, Acta Dermato-Venereologica, accepted November 1, 2011. https://www.medicaljournals.se/acta/download/10.2340/00015555-1300/
  3. ↑ Chia, K. Y.; Tey, H. L. (2012). "Approach to hypohidrosis". Journal of the European Academy of Dermatology and Venereology. 27 (7): 799–804. doi:10.1111/jdv.12014. PMID 23094789. S2CID 206038609.

Notes

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