Urticaria other diagnostic studies
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Other Diagnostic Studies
Urticaria Activity Score
Urticaria activity score (UAS7) is a scoring system, which is helpful for evaluation of spontaneous urticaria severity. It is a questionnaire-based system which mainly inquire about pruritus and wheals experienced by the patients. [1][2]
| Score | Wheals | Pruritus |
|---|---|---|
| 0 | No wheals have been appeared | Patient didn't experience any pruritus |
| 1 | Appearance of less than 20 wheals within 24 hours | Patient experienced pruritus, nevertheless it didn't annoy the patient |
| 2 | Appearance of 20 to 50 wheals within 24 hours | Patient felt annoyed with pruritus, nevertheless it didn't interfere with him/her daily activities or sleep |
| 3 | Appearance of more than 50 wheals within 24 hours or involvement of a large surface of body with confluent wheals | Patient felt annoyed with pruritus and it interferes with him/her daily activities or sleep |
- Scores have a range of 0 to 6 for each 24 hours.
- Scores should be measured for the whole week, which can have a total range of 0 to 42.
Ice Cube Test
Ice cube test is recommended as a diagnostic test in order to diagnose cold-induced urticaria. This test is performed by applying a plastic bag containing melting ice cubes on the patient's forearm for 5 minutes. Appearance of wheal within 10 minutes after removing the plastic bag is considered a positive test.[3]
References
- ↑ Godse K, De A, Zawar V, Shah B, Girdhar M, Rajagopalan M; et al. (2018). "Consensus Statement for the Diagnosis and Treatment of Urticaria: A 2017 Update". Indian J Dermatol. 63 (1): 2–15. doi:10.4103/ijd.IJD_308_17. PMC 5838750. PMID 29527019.
- ↑ Zuberbier T, Asero R, Bindslev-Jensen C, Walter Canonica G, Church MK, Giménez-Arnau A; et al. (2009). "EAACI/GA(2)LEN/EDF/WAO guideline: definition, classification and diagnosis of urticaria". Allergy. 64 (10): 1417–26. doi:10.1111/j.1398-9995.2009.02179.x. PMID 19772512.
- ↑ Stepaniuk P, Vostretsova K, Kanani A (2018). "Review of cold-induced urticaria characteristics, diagnosis and management in a Western Canadian allergy practice". Allergy Asthma Clin Immunol. 14: 85. doi:10.1186/s13223-018-0310-5. PMC 6299577. PMID 30574166.