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RESP 1450 (part 1) lecture 3 Flashcards _ QUESTIONS WITH 100- CORRECT ANSWERS!!.pdf
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8/13/24, 6:32 AMRESP 1450 (part 1) lecture 3
Jeremiah
Terms in this set (42)
a ventilator is a machine, which is a system designed to alter, transmit and direct applied
ventilator def
energy in a predetermined manner to perform useful work
-most common application is high frequency oscillator
combined pressure devices 2
-sinusoidal pressure waves include positive and negative pressure applied to airway
1. power source or input power
-electrically powered ventilator
-pneumatically powered ventilator
2. positive or negative pressure generator
3. control systems and circuits
-open and closed loop systems
-control panel: user interface
-pneumatic circuit (internal and patient circuit)
5 components of a ventilator
4. power and conversion transmission
-is a mechanical device that produces gas flow to the patient
-volume displacement
-piston powered by an electrical motor
-flow control valves
5. output
-one or more valves that regulates the flow of gas to the patient
-pressure, volume and flow waveforms
-use either 110 volts or 220 volts
electrically powered ventilators 4
-many ventilators also include direct current batteries to provide power during patient
transport of power failure
all of the things that control the amount of pressure and gas flow to the paritent
electricity used for 8
-controls timing of breaths, gas flow, alarms
1/5
, 8/13/24, 6:32 AM
pneumatically powered
-connect to high pressure gas sources (35 to 100 psig)
gas source 3
-most ventilators require 50 psig source of oxygen and compressed air
-most ventilators use microprocessor to control flow of gas to patient
need gas
-supply the power for the ventilator
-provide the gas concentration
electrically and pneumatically powered need electricity
devices need gas for 2, need electricity 5 -to run the computer and screens
-powers the solenoid valves and electrical switches
-controls the insp and exp
-monitors gas flow
-RAM and ROM, data storage , software
pneumatic ventilators: IPPB, bird mark 7
-needle valves, venturi entrainers, flexible diaphragm spring loaded valves- are used to
control flow
2 classifications - mechanism used to control
gas flow fluid ventilators: relies on principlas wall attachment and bean deflection-blomed MVP-
1-
both are rarely if ever seen today in medical settings
-use fluidics to deliver gas to patient
-do not use moving parts or electricity to function
fluidic controlled ventilators 4 and two basic
-used on Bio-med MVP 10
principles
-compatible with use during MRI
-two basic principles; beam deflection, wall attachment (coanda effect)
internal hardware that coverts electrical or pneumatic energy into the mechanical
energy required to deliver a breath to patient
drive mechanism and output control drive mechanism: mechanical device that produces gas flow to the patient )volume
mechanism (general then define each) controller)
output control mechanism: one or more valves that regulates gas flow to the patient
(flow controller)
-generates the actual force needed to deliver gas under pressure
-develop and controls pressure gradient between ventilator and patient
power transmission and conversion 4 -electric only powered ventilators use compressors, blowers
-pneumatic systems use compressed gas from wall pipelines to deliver volume to
patient (direct application)
-can be driven by pistons, rotating blades, moving diaphragms or bellows
compressors or blowers 2
-most common type of compressor: rotary compressor
-use displacement devices as drive mechanisms to deliver specific volume
volume displacement designs 2
-includes pistons, bellows, or bag in chamber mechanisms
-operator adjusts tension on spring that is used to compress bellows
-the tighter the spring the greater the force and therefore pressure
spring loaded bellows 4
-no longer manufactured
-servo 900c
the flow and pressure waveform patterns are determined in part by the type of drive
linear drive piston and rotary drive piston
mechanism it contains
2/5
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