Medical Gas Professional Healthcare Organization

Leading through education, we save lives


Scavenging/WAGD

  • Thursday, August 05, 2021 3:38 PM
    Message # 10805342

    Looking for clarification on what the difference is between scavenging and WAGD?

    Next in NFPA 99 2018 15.3.3.6.1.1 the use of scavenging shall be limited to portions of dental facilities were moderate or minimal sedation is administered. WAGD shall be provided where the dental treatment involves general anesthesia or deep sedation.


    The handbook states 15.3.3.6 nitrous oxide scavengig.

    When nitrous oxide is used for moderate or minimal sedation procedures performed on a patient, any waste gas produced through the sedation process will need to be removed safely from the room by a waste anesthetic gas disposal WAGD system or an active or passive scavenging ventilation System. Where deep sedation or general anesthesia is administered, only WAGD can be provided.


    This also brings up the question what would you do if you had a passive scavenging system in a category one hospital OR?

    Last modified: Thursday, August 05, 2021 3:40 PM | Don Holden
  • Saturday, August 07, 2021 10:38 AM
    Reply # 10855098 on 10805342
    Al Moon (Administrator)

    A hard one. So first this ( In my opinion only ):


    I'm always guarded.

    When I see a statement from the ANNEX and / or the  HANDBOOK.

    They are just plain / not the CODE.


    NFPA 99 the 2018 Edition


    Chapter#15 Dental Category I Systems are to meet Chapter #5 Systems with a couple of exceptions (i.e. the unit for vacuum can be a simplex system).


    The information and requirements in Chapter #5 Overrides the Handbook in this case. 


    Now back to Chapter#15 Dental for Category 2 Systems.

    Which can only provide Moderate and Minimal Sedation plus only be piped / supplied with Oxygen & Nitrous Oxide. 


    This Dental Charter #15 Category 2 uses the wording ( SCAVENGING VIS THE ACRONYM WAGD ).


    I personal see no difference. The goal here is to remove the inhalational agents that produces the sedation. ( see Chapter #3.3.7 ).


    As a whole its a OSHA item.


    Using the Medical and / or Dental Vacuum Producer, one would think equal the same results. Regardless of what we call it or whether its active, venturi, scavenging, evacuation, suction, vacuum, blower or less than 14.7 psig.


    Per happens, its time to review NIOSH ( National Institute for Occupational Safety and Health ) 



16339 Kranker Drive, Stilwell, KS 66085

mgpho@me.com