What is the Helix Test for?
Its purpose is to check the degree of steam penetration in the case of hollow objects and the efficacy of the air removal system. The test uses a Teflon tube open at one end only (length 1.5 m, internal diameter 2 mm), ending with a Teflon capsule, containing a chemical process indicator. EN 13060 requires for purposes of approval the employment of this apparatus to test cycles for sterilizing hollow load A (for example B cycles). The test is positive if the chemical indicator changes colour in line with the information given by the producer. The thermometer test described in the answer to F.A.Q. What is the sterilization temperature band? is not required for hollow load A, in that it is not possible to make a precise measurement of the temperature reached at the back of the cavity of the apparatus described above.
