Anes. Machine Flashcards
In 1988, what org added pre-use checkout, O2 analyzer, vaporizer calibration, alarms,…?
American Society of Testing
What is purpose of Noninterchangeable gas-specific connections to pipeline inlets (DISS) with pressure gauges, filter, & check valve?
Prevent incorrect pipeline attachments; detect failure, depletion, or fluctuation
what is purpose of
Pin index safety system (PISS) for cylinders with pressure gauges, & at least one oxygen cylinder
Prevent incorrect cylinder attachments; provide backup gas supply; detect depletion
What is purpose of Low O2 pressure alarm
Detect O2 supply failure at the common gas inlet
what is purpose of Minimum O2/N2O ratio controller device (hypoxic guard)
Prevent delivery of less than 21% O2
what is purpose of O2 failure safety device (shut-off or proportioning device)
Prevent administration of N2O or other gases when the O2 supply fails
What is purpose of O2 must enter the common manifold downstream to other gases
Prevent hypoxia in event of proximal gas leak
What is purpose of O2 concentration monitor & alarm
Prevent administration of hypoxic gas mixtures in event of a low-pressure system leak; precisely regulate O2 concentration
What is purpose of Automatically enabled essential alarms & monitors (ex. O2 concentration)
Prevent use of the machine without essential monitors
What is purpose of Vaporizer interlock device
Prevent simultaneous administration of more than one volatile agent
Capnography & anesthetic gas measurement
Guide ventilation; prevent anesthetic overdose; help reduce awareness
What is purpose of Breathing circuit pressure monitor & alarm
Prevent pulmonary barotrauma & detect sustained positive, high peak, & negative airway pressures
what is purpose of Exhaled volume monitor
Assess ventilation & prevent hypo- or hyperventilation
What is purpose of Mechanical ventilator
Control alveolar ventilation more accurately & during muscle paralysis for prolonged periods
What is purpose of Scavenger system
Prevent contamination of the OR with waste anesthetic gases
What are high pressure components of gas distribution?
High pressure from cylinders
- Hanger yoke (including filter & unidirectional valve)
- Yoke block
- Cylinder pressure gauge
- Cylinder pressure regulators
What are intermediate pressure components?
- Pipeline inlets & pressure gauges
- Gas power outlet (ventilatory/accessory outlet)
- Master switch (pneumatic component)
- Oxygen flush valve
- Oxygen pressure failure device (fail-safe) & alarm
- Oxygen & nitrous oxide second-stage pressure regulators
- Flowmeter valves
What is intermediate pressure?
37-55 psi (this is pipeline or pressure after cylinder regulator)
what prevents reverse gas flow into pipelines?
one-way check valve
what is the function of gas power outlet?
gas source for ventilator
or supply gas for a jet ventilator
Where is the master switch located in relation to the inlets for cylinder & pipeline supplies?
Downstream
What is NOT permitted when machine is in stand by ?
- No gas can flow to the patient
- No electrical power goes to the Ventilator, Display, or CPU
- O2 Flush is still available provided an oxygen supply is connected
- Electrical outlets (if equipped) are still active
- Battery will recharge
What still works when the machine is turned OFF?
Suction
Auxillary flow metter
Flush 02
What supplies the O2 flush button?
pipeline or cylinder (which ever is higher)