Presentation on theme: "Scavenging System To reduce exposure to waste anesthetic gases Can be active or passive scavenging system Active Scavenging System Connected to a."— Presentation transcript:
Scavenging System To reduce exposure to waste anesthetic gases Can be active or passive scavenging system Active Scavenging System Connected to a vacuum that sucks the waste gases out of the machine…concerns? Runs them through a drop down line, through pipes in the ceiling, and outside Passive Scavenging System Uses pressure in circuit to expel gases from the machine, out through a hole in the wall Must be room adjacent to the outside
Scavenging System Activated charcoal cartridge Cheaper than installing a scavenger Is mobile Easy to use with little maintenance Example: F/air canister Must be discarded after 12 hours of use or a gain of 50 grams Down side: do not absorb nitrous oxide
Leak Testing Performed before every anesthesia to check the system for leaks The last thing you do on your anesthetic machine *Hint: this will also tell you if your machine is hooked up correctly If running nitrous oxide, you must do a high pressure leak test This is done by: turning on the nitrous tank and then turning it off do not flush the lines to get the pressure out check in 1 hour and make sure gauge reading the same
Leak Testing – Low Pressure Test Used when oxygen is your carrier gas Steps: close pop-off valve AND cover end of rebreathing tube with something Turn on flow meter to 2 L/min and let oxygen fill reservoir bag Once full, turn down the O 2 to 0.2 L/min Gently squeeze the bag and listen/feel for leaks If none, maintain a full bag for 30 seconds at 30 cm H2O If the bag doesn’t hold pressure (remain full), you have a leak!
Oxygen Flow Rates Chamber Induction: 1-3 L/min for < 10 kg 3-5 L/min for > 10 kg Mask Induction: 5 L/min Rebreathing system: 20-40 ml/kg/min Note: this may be increased if you are inducing, changing anesthetic depth, or recovering patient