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Technology Topics 2005
CA1 - CA40 focus
BWH Anesthesia Clinical ConferenceAugust 31, 2005
James H. Philip, MEE, MD, CCE
© Copyright 2005, James H Philip, all rights reserved
Three Ventilator types at BWH
Old fashioned Bellows movement control
Fresh Gas Flow decoupling
Exhaled tidal volume feedback
More
Four Gas Sensor Technologies at BWH
Turbine Flow Sensor
Hot wire Anemometer Flow Sensor
Differential pressure across an orifice Flow Sensor
Ultrasonic Flow Sensor - MR-compatible
More
Sample Gas Return (SGR) and LeaksOlder Ohmeda Anes Machines (Ohmeda Modulus 2 and SE) have
SGR connected to CO2 Absorber port
specific port is on Absorber but functionally in Expired Ckt Limb
connection is marked Expiratory Airway Pressure
Ohmeda Aestiva and Draeger Fabius have added adapters for SGR
SGR connector is chrome and connected to CO2 Absorber Exp limb
SGR can sometimes be connected to Scavenger Interface
More
CHARCOAL ANESTHETIC AGENT ABSORBERS
Charcoal Absorbers can remove volatile agents from effluent gas
Outlying Anesthetizing Locations need innovative scavenging
Charcoal Absorbers absorb 50 g anesthetic
Charcoal Absorbers absorb almost same amount that vaporizer delivered
More
ALTITUDE EFFECTS ON VAPORIZERS
Concentration Delivery Vaporizers and Flowmeters
Partial Pressure Delivery Vaporizers
Approximate Partial Pressure Delivery Vaporizers
More
FABIUS REQUIRES PRESS ROTARY KNOB TO CONFIRM - be careful!
Draeger Fabius requires you press Rotary Knob to confirm vent settings
Ohmeda Smart-Vent allows you to confirm Rotary Knob or original Select button
Beware, Beware, Beware
This is a challenge to all of us
OXYGEN RATIO CONTROL DIFFERES AMONG MACHINES
Ohmeda Anes Machines (Ohmeda Modulus 2 and SE)
Hidden Chain links O2 and N2O needle valves
Draeger Anes Machines (Fabius, Tiro, Narkomed, Future)
Flow changes by itself when other flow is adjusted
More
Pre-Use Check Documents are available
Every machine has its machine-specific pre-use check list attached
Pre-Use Check is usually on chain at right back corner of Anes Machine
Pre-Use Checks vary slightly from model to model
Draeger Fabius is very different and included automatic ventilator calibration
Documents (Microsoft Word) are available several places
Fabius has a Water Trap
Between Ventilator and Breathing Circuit
Water condenses here
Keep it empty
More
Anesthesia Department Web Site
http://etherweb.bwh.harvard.eduAnd navigate to Education / Educational Resources / Technology Matters
Or go directly tohttp://etherweb.bwh.harvard.edu/education/resources/anes_tech.php
Special thanks to Anes IS TeamJamie Bell, Dan Holtzman, Fred Donovan, Athena Dimas, and new Director, Bob Gimlich
All this pre-use check and use info is on