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Lung Mechanics
Fundamentals
Question | Answer |
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List the device and describe the technique that you would use to measure Peak expiratory flow rate, inspiratory capacity, slow vital capacity and negative inspiratory force. | |
Given a tidal volume and resp rate calc the minute volume | |
A healthy adult should have a peak expiratory flow rate in excess of | |
What would you predict for a vital capacity on a normal healthy person with no history of lung disease if VC=65-75 ml/IBW | |
What would you predict for a negative inspiratory force (NIF) or negative inspiratory pressure (NIP) in a person with no history of lung disease? | |
Describe the indications for a peak flow measurments | |
Describe the zones used in PEFR measurements discussed in class | |
Medical vacuum system | Series of vacuum pumps, an air receiver, etc. where a neg.pressure is created so that suction maybe used in surgical or patient rooms |
List 3 methods of o2 production | Chemical method, fractional distillation, physical separation |
Identify the most common method of commercial O2 production | Fractional distillation |
Identify reasons for an adjustable oxygen regulator | Used to control both pressure and flow |
Liquid gas cylinder | Gauge press. Is a measure of only the vapor press. Of gas in equilibrium w/liquid phase |
Flow restrictors when exposed to a downstream resistance to flow? | Can not change flow, cannot be set to incorrect |
Liquid o2 resp. System | Most cost efficient and convenient means of supplying oxygen to patients in hospital setting and those that would require continuous home o2 |
Gas filled cylinder | Directly proportional to the gas press. Ex. Press decrease 50% indicates a loss of 50% of the contained gas |
True concerning O2 concentrators | As flow rates increase delivered concentrations decrease |
Which flow metering devices will indicate a flow higher than actual when exposed to a downstream resistance to flow | Bourdon gauge , flow restricted |