I use Abbott reagents which all have storage temperature limits on the packets. The alarm alert limits are set to be within these times. Some of the temperature sensors for reagent storage are placed in water in the smallest reagent container in use to prevent discarding reagents unnecessarily for transient temperature changes like opening a freezer door. The sensor should always be in the area of the fridge or freezer with the worst temperature control, usually at the front near the door.
The room temperature reagent store is monitored in the same way.
Mike Collins
BMS3
Biochemistry Automation
Norfolk & Norwich University Hospital
England
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http://www.nnuh.nhs.uk/
-----Original Message-----
From: Clinical biochemistry discussion list [mailto:[log in to unmask]] On Behalf Of Ian Hanning
Sent: 11 August 2011 16:55
To: [log in to unmask]
Subject: Temperature monitoring
Dear Colleagues
We are all well-versed in monitoring temperatures of fridges, freezers and indeed ambient temperature (and don't we know it when CPA visit!).
A simplistic view is that this is used to identify fridges/freezers that are not maintaining temperature and need replacing/repairing, or if ambient temperatures necessitate air conditioning/heating. In reality, we want to identify potential stability problems for reagents and samples so that we can take appropriate action.
However, does anyone actually have criteria to identify when the contents of a fridge/freezer or reagents kept at 'room temperature' should be discarded because of 'out of range' temperatures? I'm not aware of any guidance, other than recommended storage conditions.
There may also be the problems of fluctuations in temperature due to continual access, different effects on a 2L volume compared with a 100uL volume in a fridge etc etc. Also, what time period is significant?
Your views would be appreciated, although I suspect the term 'pragmatic' may appear.
Kind regards
Ian
Ian Hanning
Consultant Clinical Biochemist
Department of Clinical Biochemistry
Hull Royal Infirmary
Hull HU3 2JZ UK
Tel 01482 607716
Fax 01482 607725
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