Hazards

Scavenging systems minimize operating room pollution, but they add complexity to the anesthesia system. A scavenging system extends the anesthesia circuit from the anesthesia machine to the ultimate disposal site. This extension increases the potential for problems. Obstruction of scavenging pathways can cause excessive positive pressure in the breathing circuit, and barotrauma can occur. Excessive vacuum applied to a scavenging system can cause negative pressures in the breathing system.