TempTest® produces temperatures of 4°- 44° C. which are applied to the skin. The patient places the inner forearm on an aluminum stencil on the device for 5 minutes. The stencil shows the temperature range continuously. With this procedure it is determined at which threshold temperature (highest temperature for cold- and lowest temperature for heat urticaria) wheals are triggered.
The device determines if a patient suffers from cold contact urticaria (CCU) and at what threshold temperature the symptoms occur. Cold contact urticaria is a form of physical urticaria, in which with contact of the skin with temperatures below skin temperature, symptoms like itching, burning wheals and/or angioedema will occur. The device can also detect heat contact urticaria (reaction to contact with temperatures above skin temperature). Cold contact urticaria however is the more frequent type.
The determination of the critical threshold for the ucaresymptoms is stated in the EAACI/GA²LEN/EDF/WAO guideline. Being the only device to detect the threshold temperature, the TempTest® is mandatory.
Each urticaria consultation to become part of the worldwide acknowledged UCARE (Urticaria Center of Excellence and Reference) has to undergo an audit which also makes the use of TempTest® a basis for the assessment. Find worldwide existing UCARE Reference Centres here: www.ga2len-ucare.com.