Re: [Histonet] Microwave procedure for monitoring temperature reproducibility
And now a vendor weighs in:
We have several calibration and "accreditation-related" articles
available on our website (www.ebsciences.com ,
In addition, we're happy to see that microwave use in the histology
laboratory is finally being given the scrutiny it deserves. Many of the
suggestions in CLSI's GP-28 guidelines (referenced in other postings)
are excellent, for example, troubleshooting, container placement, power
output determination, and overall, standardization of procedures and
elimination of variables. However, I feel there are some significant
problems with this publication; I have previously informed CLSI of my
Page 11, section 4.7: "A qualified authority CERTIFIED IN USING
MICROWAVE LEAKAGE INSTRUMENTATION [my emphasis] should determine
microwave leakage..." The problem is, to our knowledge, NO SUCH
CERTIFICATION EXISTS! Furthermore, despite repeated requests, CLSI has
not been forthcoming with suggestions. This is not to imply the absence
of extant legislation, Federal and otherwise, regulating the manufacture
and use of microwave devices; manufacturers have to comply with FDA and
other regulations regarding microwaves intended for in-vitro diagnostic
use. But as for leakage detection in the field, we have yet to come
across any relevant (or irrelevant, for that matter) Federal or State
certification. As you can imagine, for institutions deciding to adopt
the more stringent CLSI guidelines, this poses something of a "Catch-22."
In addition, page 17 outlines the use of a neon bulb array, for those
who aspire to eliminate "hot spots" in the microwave chamber. However,
while this can be a "fun" way to indirectly observe microwave energy,
unless the microwave were horribly defective, it is a fairly useless
exercise. Any object (including the array itself) placed in the
microwave chamber affects the distribution of microwaves, a classic
example of attempted observation affecting the phenomenon observed.
I want to stress, however, that overall, publication GP-28A is an
outstanding effort to provide "recommendations for quality assurance and
safety procedures for microwave equipment use" in their words, and to
help troubleshoot and eliminate variability in results of microwave usage.
Microwave Product Manager
Energy Beam Sciences, Inc.
29-B Kripes Rd.
East Granby, CT 06026
Tel: 800.992.9037 x 341
You must be the change you want to see in the world.
- Mahatma Gandhi
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Zummak Melissa wrote:
> Hi everyone,
> Does anyone know where I can find recommendations for
> checking\monitoring temperature reproducibility for microwaves, I only
> use the microwave for certain special stains currently.
> Melissa Zummak
> Alverno Clinincal Lab
> Histonet mailing list
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