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Respiratory Air Flow And Volume Essay

715 words - 3 pages

Respiratory Air Flow and Volume

Exercise 1: Lung volumes and capacities
Using the Horizontal Compression buttons and the scroll bar, display the data you wish to include in your report.

Lung Volumes and Capacities"
Respiratory Parameters"Abbreviation"Units"Experimental Value"Predicted Value"
Respiratory Rate"RR"breaths / min"20.0""
Tidal volume"VT"L"0.74""
Expired minute volume"VE (= VT x bpm)"L / min"14.74""
Inspiratory reserve volume"IRV"L"0.93""
Expiratory reserve volume"ERV"L"1.23""
Residual volume"RV (predicted)"L"1.55"1.55"
Inspiratory capacity"IC (= VT + IRV)"L"1.67""
Expiratory ...view middle of the document...

Forced Expired Volume in 1 second"FEV1"L"1.56"3.63"
% FVC expired in 1 second"FEV1/FVC x 100""61%"86%"

Study Questions
1. Comment on the differences between the experimental and predicted values for FVC, FEV1 and the FEV1/FVC ratio in the table above. What could cause these differences, if any?

2. In you own words describe the physiological significance of the FEV1/FVC ratio?

3. Were your results for forced breathing consistent across all three trials? If not, why not?

Exercise 3: Simulated airway restriction
Using the Horizontal Compression controls and the scroll bar, display the data for both normal pulmonary function tests (Exercise 2) and the simulated restricted airway (Exercise 3) for inclusion in your report.

Effect of Airway Restriction on Pulmonary Function Variables"
Respiratory Parameter"Abbreviation"Units"Unrestricted Airway"Restricted Airway"
Peak Inspiratory Flow"PIF"L / min"218"55"
Peak Expiratory Flow"PEF"L / min"139"47"
Forced Vital Capacity"FVC"L"2.57"2.08"
Forced Expired Volume in 1 second"FEV1"L"1.56"0.60"
% FVC expired in 1 second"FEV1/FVC x 100""61%"29%"
Study Questions

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