True about scavenging action in OT –
Scavenging system is to eliminate exhaled gases from OT to minimize theatre pollution. Maximum permissible concentration of N2O in theatre is 25 ppm and that of halogenated agents is less than 2 ppm.
Outlet connection is 22 mm male fitting
Interface limit pressure is 0 to +2 cm H2O
The charcoal as an adsorbent should not be used
Scavenging is defined as the collection of excess gases from equipment used in administrating anesthesia or exhaled by the patient and removal of these gases to an appropriate places discharge outside the working environment