Re: [Histonet] Gross lab seniors

[WILLIAM DESALVO]

Absolutely the Face velocity changes with the work area set-up. This is why I like to make sure  the air flow away is maintained at a minimum. Most grossing stations have large working area and often the flow away from the grosser is not checked, just the vent opening draw. Most important is to set up a process and then regularly check. 






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From: E. Wayne Johnson 朱稳森
Sent: ‎Saturday‎, ‎February‎ ‎1‎, ‎2014 ‎3‎:‎12‎ ‎PM
To: WILLIAM DESALVO
Cc: Vickroy, Jim, histonet





Face velocity is simply the airflow rate in CFM divided by the area of 
the hood opening in square feet.

A smaller opening at the same flow rate gives a higher face velocity.

Titanium tetrachloride in a small plastic squeeze bottle can be used to 
generate "smoke".


On 3:59 AM, WILLIAM DESALVO wrote:
> We use a company called C-Scan Technologies, Phoenix, AZ. The way they test all our gross dissection stations is by testing for directional or smoke containment and face velocity. We also check th they external pathway is clear and if the unit has a filtering system, the filters are changed regularly. The air flow measurement is Feet per minute (FPM) for face velocity and includes width, height, depth and total square ft for the working area. They exhaust flow in CFM. Face velocity minimum requirement is 100 fpm, exhaust flow requirement is>500 cfm. Face velocity fluctuates depending on the room and the air exchange rate for the area. I have always felt the face velocity is most important to gross dissection personnel. There needs to be adequate draw away from the employee, no matter the physical conditions of the room.
>
> William DeSalvo, BS HTL(ASCP)
> Production Manager-Anatomic Pathology
> Chair, NSH Quality Management Committee
> Owner/Consultant, Collaborative Advantage Consulting
>
>
>    
>> From: Vickroy.Jim <@t> mhsil.com
>> To: histonet <@t> lists.utsouthwestern.edu
>> Date: Fri, 31 Jan 2014 12:46:08 -0600
>> Subject: [Histonet] Gross lab seniors
>>
>>
>> We have several gross lab senior grossing stations that are vented outside.  Our engineering asked today whether the airflow should be checked yearly like other exhaust hoods.   Problem is there is not a door like other hoods of course and how would you measure the airflow?   Recommended airflow is 500cfm however clearly the airflow at the working surface is not anything close to that.   I wondered how anybody else monitors the gross lab seniors or do they at all.   CAP used to ask about documentation for checking hoods however I can't recall them ever checking on grossing stations.  We change filters annually  only since they are vented outside.
>>
>> Jim
>>
>> James Vickroy BS, HT(ASCP)
>>
>> Surgical  and Autopsy Pathology Technical Supervisor
>> Memorial Medical Center
>> 217-788-4046
>>
>>
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