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RTH 132 Hannah > Classifications of Ventilators > Flashcards

Classifications of Ventilators Flashcards

1
Q

What does the Chatburn Classification System have?

A

Input power source, positive/negative pressure, control systems and circuits, power transmission, and output

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2
Q

What are the options of the input power source?

A

Electric, pneumatic, combined, manual

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3
Q

What are the parts of the control systems and circuits?

A

Open vs closed loop, control panel and pneumatic circuit

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4
Q

What are the parts of the power transmission?

A

Compressor or bellows, volume displacement design, flow control valves

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5
Q

What is included in output?

A

Pressure waveforms, volume waveforms and flow waveforms

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6
Q

What does it mean when something is pneumatically powered?

A

It is powered by a 50 psi gas source

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7
Q

What do negative pressure ventilators do?

A

“Pull” open the lungs

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8
Q

What do positive pressure ventilators do?

A

“Push” open the lungs

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9
Q

What are the two parts to the pneumatic circuit of the control system?

A

Internal circuit (single or double circuit) and external circuit (tubing to patient)

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10
Q

What is another term for an open system?

A

Unintelligent

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11
Q

What does it mean when a ventilator is “unintelligent?”

A

You set the parameter and it delivers with “no questions asked”

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12
Q

What is another term for a closed system?

A

Intelligent

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13
Q

Where is the control panel located? What does it do?

A

It is the outside surface of the ventilator and is monitored/set by the user. It governs the four physical parameters: volume, time, pressure and flow

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14
Q

What is an internal control system?

A

It reads and interprets what is set and controls the function of the drive mechanism

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15
Q

What is a double circuit?

A

It is two sources of gas that never mix together

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16
Q

What is the external circuit?

A

It is outside of the machine and it connects the vent to the patient’s airway

17
Q

What does the external circuit consist of?

A

The main inspiratory line, “wye” adapter to the patient, expiratory line, expiratory valve (internal or external)

18
Q

What are some devices that are used with patient circuits?

A

Air warmer/humidifier, temperature sensing device, an apnea or low pressure alarm, nebulizer line, volume measuring device, bacteria filter and a proximal pressure gauge

19
Q

What is power transmission and conversion?

A

Conversion of power source to work and work provided by the drive mechanism

20
Q

What are some volume displacement designs?

A

Bellows, pistons, flow valves and solenoids

21
Q

What is the purpose of volume displacements?

A

Volume controllers

22
Q

What are some examples of flow control valves?

A

Proportional solenoids, stepper motion with valve, digital valve (on/off configuration)

23
Q

What is a flow control valve?

A

It delivers flow for a specific amount of time. Not measuring volume but guaranteeing it

24
Q

What are the kinds of bellows and pistons used?

A

Spring loaded bellows, linear or rotary drive pistions

25
Q

What are compressors or blowers used for?

A

Used as the power source or for converting and transmitting a power source

26
Q

How can you change a compressor volume?

A

By compressing space that will increase pressure

27
Q

How do compressors run?

A

They can be piston driven, rotary blades, moving diaphragms or bellows

28
Q

What does a drive mechanism do?

A

It generates the actual force needed to deliver gas under pressure

29
Q

What does output control consist of?

A

One or more valves that regulate flow to the patient

30
Q

Power transmission and conversion consists of?

A

Drive mechanisms and output control mechanisms

31
Q

Large compressors supply _________ that provide power to ventilators

A

Wall outlets

32
Q

Some ventilators have built in _________ to be used when power is not available (or sometimes even as the main source)

A

Compressors

33
Q

Most modern vents have __________. These _______ control or direct gas flow and can open/close completely or in small increments

A

Flow control valves; valves

34
Q

What are flow control valves driven by?

A

Various motor-based mechanisms

35
Q

Flow control valves have ______ response time and are very _______

A

Rapid; flexible

36
Q

What happens when you attach a piston to a wheel?

A

Produces a different flow pattern (the speed will be much faster in the middle of the breath). More physiologic

RTH 132 Hannah (12 decks)

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