[Histonet] Microwave Devices and Proposed Guidelines

Tue Dec 14 09:44:22 CST 2004

I've found that the issue of commercial vs industrial microwaves boils down
to a ventilation problem( possible explosion or respiratory problem on a
"stain" becoming an aerosol) as well as QA as far as temperature and time
regulation. The microwave should be vented (ours is in the back) to the
outside or a fume hood.

-----Original Message-----
From: histonet-bounces <@t> lists.utsouthwestern.edu
[mailto:histonet-bounces <@t> lists.utsouthwestern.edu]On Behalf Of Sandy
Cheasty
Sent: Monday, December 13, 2004 11:48 AM
To: 'histonet <@t> pathology.swmed.edu'
Subject: [Histonet] Microwave Devices and Proposed Guidelines

	If you receive any info on this would you please let me know.  We
are currently using a microwave from Wal-Mart.  There has got to be some
kind of exception somewhere.  What about labs that could not justify a lab
microwave but has a commercial one that works just as good for special
stains only.   Thanks, amy  

-----Original Message-----
From: histonet-bounces <@t> lists.utsouthwestern.edu
[mailto:histonet-bounces <@t> lists.utsouthwestern.edu]On Behalf Of Sandy
Cheasty
Sent: Friday, December 10, 2004 2:58 PM
To: 'histonet <@t> pathology.swmed.edu'
Subject: [Histonet] Microwave Devices and Proposed Guidelines

I know there are thousands of histology labs that use commercial microwaves
safely and have used them safely for years. 

Does everyone:
-violate OSHA?  
-lie to their lab managers?

There must be some way of continuing to use commercial microwave ovens for
special stains without being subversive. Don't get me wrong, I usually enjoy
being subversive.

Can someone please give me a justification for using a commercial microwave
or tell me where I can get an OSHA approved one for less than $1000?

Thanks again,
Elvis

-----Original Message-----
From: Willis, Donna [mailto:DonnaWillis <@t> texashealth.org] 
Sent: Friday, December 10, 2004 7:08 AM
To: Sandy Cheasty; histonet <@t> pathology.swmed.edu
Subject: RE: [Histonet] NCCLS Microwave Device Use Proposed Guideline

It is against OSHA guideline (OSHA 29 CFR 1910.303(b)(2))to use a commercial
microwave (exp. Wal-Mart).  The warranty of commercial units state that the
instrument is not to be used for anything except its original use, food
preparation.  The OSHA guideline would include any equipment in the lab.  If
someone gets injured the lab would be at fault not the manufacture.

Donna Willis
Histology Lab Manager 
Harris Methodist Fort Worth,Tx

-----Original Message-----
From: histonet-bounces <@t> lists.utsouthwestern.edu
[mailto:histonet-bounces <@t> lists.utsouthwestern.edu] On Behalf Of Sandy
Cheasty
Sent: Friday, December 10, 2004 7:40 AM
To: histonet <@t> pathology.swmed.edu
Subject: [Histonet] NCCLS Microwave Device Use Proposed Guideline

I have the GP28-P guideline and read it but am unsure about its
recommendations or limitations in using a microwave for special stains only.

Is there any consensus among histology labs as to its interpretation? Is it
still OK to use a commercial microwave from Wal-Mart without special exhaust
system as long as you don't microwave formaldehyde, osmium tetroxide, lead
acetate etc. (Paragraph 4.4) and do annual leakage tests?

Thanks!
Elvis

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