A Bowie-Dick test pack is the air removal test used on pre-vacuum sterilizers, and it exists to fail when a chamber retains air. Because it is designed to expose a poor air removal step, the test is only meaningful when it is run on an otherwise empty chamber at the start of a day the sterilizer is used, with the pack placed the way the manufacturer specifies.
Buying decisions come down to pack type and quantity. A six-pack of Bowie-Dick test packs covers a week of daily checks on a single pre-vacuum unit, which is the pattern that makes restocking predictable.
What should you check before buying Bowie-Dick packs?
Five items belong on the checklist: suitable sterilizer type, the test standard referenced on the pack, the pack construction, the batch quantity, and the lot number for the record.
| Check | Why it matters |
|---|---|
| Sterilizer type | Air removal tests apply to pre-vacuum units, not gravity units |
| Standard referenced | Identifies the test specification the pack was made to |
| Pack construction | Single-use packs avoid assembly variability between operators |
| Batch quantity | Matches the number of days the unit is used |
| Lot number | Recorded on the daily log for traceability |
How many packs does a clinic need?
One per day of use per pre-vacuum sterilizer, plus a margin for re-tests after a failed cycle or a repair. A clinic running a pre-vacuum unit five days a week should expect to use around 250 test packs a year, which is the same cadence as the daily biological indicator.
Gravity displacement sterilizers do not need this test at all, which is a common source of unnecessary ordering and of records that show a test against the wrong machine.
How should the result be documented?
Record the test date, the sterilizer, the result, the operator initials and the pack lot number on the same daily sheet as the biological indicator. Filing the two separately is the documentation gap that most often appears in a records review, because a reviewer cannot see the unit’s full day without reconciling two documents.
Ordering for a clinic, lab or care home? Wholesale and multi-site ordering covers case pricing and account setup, and the B2B wholesale collection lists the lines stocked for institutional buyers. Reselling? become a distributor.
Take the paperwork with you: download the printable sterilization log sheet, build a month of entries with the log generator, and ask a compliance specialist to review your records before an inspection.
Related reading
Why autoclave cycles fail the Bowie-Dick test · Loading pouches paper side up · Sterilization monitoring supplies
Frequently Asked Questions
Which sterilizers need a Bowie-Dick test?
Pre-vacuum sterilizers, where the test checks that air was removed before sterilizing. Gravity displacement units do not require it.
How many Bowie-Dick packs does a clinic need?
One per day of use per pre-vacuum sterilizer, plus a margin for re-tests, which is roughly 250 a year for a five-day week.
When should the test be run?
At the start of a day the sterilizer is used, on an otherwise empty chamber, with the pack placed as the manufacturer specifies.
How should the result be recorded?
On the same daily sheet as the biological indicator, with the date, sterilizer, result, initials and pack lot number.
CliniEco Medical is a licensed medical device establishment (MDEL #35334).
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