[Histonet] histology lab temperature and humidity

[Morken, Timothy]

Cassandra, the requirement for humidity covers requirements for equipment (specifications will specify operating conditions - temperature, humidity), chemicals (some are hygroscopic and high humidity can shorten shelf life) and "working environment." If you find that you need certain humidity levels for good results, or worker comfort,  you can put that in your environmental procedures. The question is, what can you do about it to change the levels?


Besides those things, low humidity is a fire danger, and continuous high humidity can be an infection control concern.

We set our humidity range at 20% to 60%. Here we never get to 20% but we sometimes go over 60% in some our labs on mild foggy days, mainly in older buildings.


Tim Morken
Supervisor, Electron Microscopy/Neuromuscular Special Studies
Department of Pathology
UC San Francisco Medical Center

-----Original Message-----
From: Cassie P. Davis via Histonet [mailto:histonet at lists.utsouthwestern.edu] 
Sent: Tuesday, September 18, 2018 10:30 AM
To: histonet
Subject: [Histonet] histology lab temperature and humidity


At one of my jobs we were discussing the way excess humidity can cause tissue to fall off slides even when they are charged or treated and may need to be in the slide dryer longer. Isn't there a CAP requirement requiring monitoring of the humidity as well as temperature in the actual lab not just where slides are stored?


Cassandra Davis
Histology Technician
AP Laboratory
302-575-8095
Email:  CDavis at che-east.org<mailto:CDavis at che-east.org>



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