The Anesthesia Machine: Introductory Lecture on Components and Safety Systems
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The Anesthesia Machine: Introductory Lecture on Components and Safety Systems
- 1. Introductory Lecture Series: The Anesthesia Machine PORNSIRI WANNADILOK
- 3. vaporizer bellow Corrugated tube Soda lime Flow meter ventilator APL valve Scavenging system
- 4. The Anesthesia Machine High Intermediate Low Pressure Circuit
- 6. E Size Compressed Gas Cylinders 1800 838 750 2000 Pressure Full (psig) 8.90 8.80 6.76 Full Weight (kg) 5.90 5.90 5.90 5.90 Empty Weight (kg) 625 1590 1590 625 Contents (L) Gas Liquid and gas Liquid and gas Gas State Black/White (yellow) Gray Blue White (green) Color Air Carbon Dioxide Nitrous Oxide Oxygen Cylinder Characteristics
- 27. Classification of Vaporizers Thermocompensation Supplied heat Temperature compensation Injection Bubble through Flow-over Method of vaporization Measured flow Concentration calibrated (e.g. variable bypass) Methods of regulating output concentration
- 37. The end
Editor's Notes
- Mention how the machine is divided into high, intermediate, and low pressure systems
- At this point mention that in Sudbury Ontario in the 1970s 23 people died because the N20 and O2 pipelines were crossed over during repairs. Ask them what they would do in this situation? Backup oxygen cylinder turned on Pipeline supply must be disconnected (necessary because the machine will preferentially use the pipeline supply as per the high pressure system regulator design).
- The concentration control dial may be located in the bypass chamber of the outlet of the vaporizing chamber Mention that the machine standard requires that all vaporizers on the anesthesia workstation be concentration calibrated (aka variable bypass, direct reading, dial-controlled, automatic plenium, percentage-type, tec-type vaporizers, and vaporizer chamber bypass arrangements
- C’ = concentration at the new atmospheric pressure C = the concentration at the old atmospheric pressure (i.e. the concentration dialed into the vaporizer) P’ = the barometric pressure for which c’ is being established P = the barometric pressure for which the vaporizer is calibrated (i.e. at the old atmospheric pressure)
- The final three points of the advantages section are meant to contrast with the Bain circuit
- Mention that the ventilator relief valve is the same thing as the overflow valve mentioned in the previous slides