Protein Residue Test

This is a chemical test to detect levels of protein on a processed load that cannot be seen by visual inspection.

What Is It?

A Protein Residue Test looks for deposits that cannot be seen through visual inspection. This is a chemical test to detect levels of protein on a processed load (instruments) that cannot be seen by visual inspection. The test is performed on the instruments, NOT the machine. If an instrument is not clean it cannot be sterilised. Dirty instruments that are processed through a sterilisation cycle will not be sterile at the end of the decontamination process. A record must be kept of each protein residue test as evidence.

When Is It Performed?

The Protein Residue Test should be performed Weekly, and results recorded in the machines logbook. The test can be performed by the user of the washer disinfector (usually a dental nurse or decontamination assistant).

Specific Title Document Reference Periodic Testing
D W Q Y
Protein Residue Test HTM 01-05 14.3 Refers to ISO 15883  

USER

CP(D) or ENG

CP(D) or ENG

WHTM 01-05 14.3 Refers to ISO 15883
SDCEP 6.2.1 Freq. as manufacturer 

 

How Is It Done?

Step 1. Remove the swab and dampen with drops of either the moisturizer or distilled water. Tap water should not be used as this will present a failed result at the end of the test.
Step 2. Swab the test area then replace back in the pen.
Step 3. Press down to click the swab into the reaction fluid in the cap.
Step 4. The swab should be incubated at 37°C for 45 minutes or 55°C for 15 minutes for a faster test result.
Step 5. A successful test showing no residual protein will produce a green colouration of the swab. Purple indicates a failed result and the presence of protein. 

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