Hello
I used to work in the Central Sterile Dept. at our hospital for 4yrs and 
Histology never sent there instruments to us. Also long as you are using a 
good disinfectant, check with your central sterile dept. that the one you are 
using is the right type you should be fine. I personally feel that if the 
central sterile department don't mind running your instruments thu there 
system it would be a good idea. They have the correct equipment to meet the 
temperatures, although your instruments don't need to be sterile but you are 
using them with bloody tissues and you could be a risk. 
The Central Sterile Tech's have there education in this field just like we do 
in our field.
They are certified in there field. This is my personal opinion.
Sandi Miller HT