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APPENDIX 4
BOWIE AND DICK TEST
The Bowie & Dick (B&D) Test device, also called Steam Penetration Test device, is representative of the
small porous type load. It comprises several sheets of paper wrapped in a small packet in the middle of
which there is a chemical heat-sensitive indicator sheet.
This test is used to validate the sterilizer performance in terms of textile load sterilization, that is:
•
Pre-vacuum efficiency and thus steam penetration
•
Temperature and pressure parameters of saturated steam achieved during the plateau/holding time.
The Bowie & Dick test cycle profile is identical to the profile of the B UNIVERSAL 134 sterilization cycle,
with the following differences:
•
The plateau period (PR) is shorter (3 minutes 30 seconds instead of 4 minutes), assuring a 30
seconds security margin.
•
The drying time is reduced to 4 min to not affect the chemical indicator through drying and to save
time. It is therefore normal that the test pack will be wet at the end of the test cycle.
How to carry out the test:
•
The test must be performed in an empty chamber (EN 13060) without load but with the standard
chamber accessories (chamber rack and trays) mounted.
•
Place the Bowie & Dick test pack in the center of a tray in the lowest rack position.
•
Select and initiate the Helix / B&D test cycle from the "Test cycles" submenu.
•
Once the cycle is finished, open the sterilizer door and remove the test pack.
CAUTION: The packet will be hot!
For correct interpretation of the test results, refer to the instructions of the
test pack manufacturer.
•
Remove the indicator sheet from the center of the test pack and check the change in colour as ex-
plained below:
TEST PASSED
The entire sur-
face of the indi-
cator sheet has
changed colour
TEST FAILED
Certain areas of the indicator
sheet have not changed colour,
e.g., the central part has not
turned dark due to an air pocket
in the center of the test pack
Any unexpected colour change, such as the center of the indicator sheet being paler or of a different colour
than the edges, indicates that there was an air pocket present during the cycle due to sterilizer malfunction.
If the test fails repeatedly call technical service. Follow local/national guidelines on the frequency of testing.
Summary of Contents for Lisa
Page 1: ...Instruction for use UM009ENG LISA FULLY AUTOMATIC 201 10 Rev 4...
Page 2: ......
Page 77: ......
