Using the Horizontal Compression buttons and the scroll bar, display the trace and table of results for each exercise. Email the report to yourself and use your results to answer the following questions, including the trace and table of results where appropriate.
You should read through your lecture notes on the respiratory system; the background information for this class on Moodle; and section 23-7 in Martini (2012) p830-838.
Please hand your individual work into the Student Centre by the deadline.
Exercise 1: Lung Volumes and Capacities
The predicted values are based on the Goldman and Becklake equations for Pulmonary Function (cited from the John Hopkins Pulmonary Laboratory).
1. Comment on the differences between the experimental and predicted values for VC, FRC and TLC. What could cause these differences, …show more content…
Comment on the differences between the experimental and predicted values for FVC, FEV1 and the FEV1/FVC ratio. What could cause these differences, if any?
The experimental values for FVC and FEV1 are lower than the predicted values but the FEV1/FVC ratio is similar. The FVC is very low compare to the predicted value. These differences may be due to the experimental error or other environmental factors. The subject maybe didn’t exhale the air forcefully and have a small chest cavity. Also, any illness, differences in height and age might have caused the differences.
5 marks
3. What is the physiological/pathological significance of the FEV1/FVC ratio?
FEV1/FVC ratio Is the percentage of forced vital capacity expelled during the 1st second of a forced expiration.
2 marks
4. Were your results for forced breathing consistent across all three trials? If not, why not?
The forced breathing readings weren’t not consistent as they were different to each other. The subject found it hard to follow the procedure accordingly to inhale and exhale hence the values were different.
2
You should read through your lecture notes on the respiratory system; the background information for this class on Moodle; and section 23-7 in Martini (2012) p830-838.
Please hand your individual work into the Student Centre by the deadline.
Exercise 1: Lung Volumes and Capacities
The predicted values are based on the Goldman and Becklake equations for Pulmonary Function (cited from the John Hopkins Pulmonary Laboratory).
1. Comment on the differences between the experimental and predicted values for VC, FRC and TLC. What could cause these differences, …show more content…
Comment on the differences between the experimental and predicted values for FVC, FEV1 and the FEV1/FVC ratio. What could cause these differences, if any?
The experimental values for FVC and FEV1 are lower than the predicted values but the FEV1/FVC ratio is similar. The FVC is very low compare to the predicted value. These differences may be due to the experimental error or other environmental factors. The subject maybe didn’t exhale the air forcefully and have a small chest cavity. Also, any illness, differences in height and age might have caused the differences.
5 marks
3. What is the physiological/pathological significance of the FEV1/FVC ratio?
FEV1/FVC ratio Is the percentage of forced vital capacity expelled during the 1st second of a forced expiration.
2 marks
4. Were your results for forced breathing consistent across all three trials? If not, why not?
The forced breathing readings weren’t not consistent as they were different to each other. The subject found it hard to follow the procedure accordingly to inhale and exhale hence the values were different.
2