Shared Flashcard Set

Details

Ch 3
How ventilators work
16
Medical
Undergraduate 2
02/05/2012

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Cards

Term

What is the user interface?

Definition
 The knobs or controls on a control panel that is set by the person operating ventilator
Term

What is the control system?

Definition
 Interprets the operators settings and produces and regulates the desired output
Term

When is battery pwr used?

Definition
 Usually is used for a short time, such as for transporting a ventilated pt. It also can be used in the home as a backup pwr source if the home’s electricity fails
Term

What does pneumatically pwrd mean?

Definition
 Ventilators that depend entirely on a compressed gas source for power
Term

What are the two types of pneumatically powered ventilators?

Definition
 Pneumatic ventilators and fluidic ventilators
Term

What is an example of each for the 2 types pneumatically pwrd vents?(Name and brand of ventilator)

Definition
The Bird Mark 7 is an example of a pneumatically pwerd and operated ventilator. An example of a ventilator that uses fluidic control circuits is the Bio-Med MVP-10
Term

What is a microprocessor-controlled ventilator?

Definition
A single chip made of integrated circuits (controls the functions of capacitors, solenoids, and electrical switches which regulate the phasing of inspiration and expiration and the monitoring of gas flow)
Term

In a combined pwr ventilator: which pwr source provides the energy to deliver the breath? 

Definition
The pneumatic power (i.e.the 50 psi gas sources)
Term

What is an open loop system?

Definition
 Ventilators that are not microprocessor controlled (unintelligent systems)
Term

Why is it termed an open loop system called an unintelligent system?

Definition
 B/c the ventilator cannot be programmed to respond to changing conditions
Term

What is a closed loop system?

Definition
Often described as “intelligent” systems b/c they compare the set control variable to the measured control variable
Term

What is an example of a closed loop system?

Definition
 The mode of ventilation called mandatory minute ventilation
Term

Where is the control panel located?

Definition
On the surface of the ventilator and is monitored and set by the ventilator operator
Term

What makes up the control panel and what do these controls regulate?

Definition
Has various knobs or touch pads for setting such components as tidal volume, rate, inspiratory time, alarms, and FiO2. These controls ultimately regulate four ventilatory variables: flow, volume, pressure, and time
Term

What is a pneumatic circuit?

Definition
Aka pathway; a series of tubes that allow gas to flow inside the ventilator and between the ventilator and the pt
Term

What are flow control valves?

Definition
 Control or direct gas flow by opening and closing either completely or in small increments. These valves which are driven by various motor based mechanisms, have a rapid response time and gr8 flexibility in flow control
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