Physioex Ex 7 Activity 5 and 6 - 2091 Words

ACTIVITY 5 Exploring Various Breathing Patterns You will establish the baseline respiratory values in the first part of this experiment. 1. If the grid in the data control unit is not empty, click Clear Table to discard all previous data. 2. Adjust the radius of the airways to 5.00 mm by clicking the appropriate button next to the Radius window. Now, read through steps 3–5 before attempting to execute them. 3. Click Start, and notice that it changes to Stop to allow you to stop the respiration. Watch the simulated lungs begin to breathe as a result of the external mechanical forces supplied by the pump below the bell jar. Simultaneously, the oscilloscope will display a tracing of the tidal volume for each breath. 4. After 2 seconds, click†¦show more content†¦Note that when a measure button is selected, two things happen simultaneously: (1) a bracket appears on the spirogram to indicate where that measurement originates on the spirogram and (2) the value in milliliters appears in the data table. Also note that when the FEV1 measure button is selected, the final column labeled FEV1/FVC will be automatically calculated and appear in the data table. The calculation is (FEV1/FVC) _ 100%, and the result will appear as a percentage in the data table. What do you think is the clinical importance of the FVC and FEV1 values? Why do you think the ratio of these two values is important to the clinician when diagnosing respiratory diseases? _______ FEV1/FVC _ 100% _ ______________________ Emphysema Breathing In a person with emphysema, there is a significant loss of intrinsic elastic recoil in the lung tissue. This loss of elastic recoil occurs as the disease destroys the walls of the alveoli. Airway resistance is also increased as the lung tissue in general becomes more flimsy and exerts less mechanical tethering on the surrounding airways. Thus the lung becomes overly compliant and expands easily. Conversely, a great effort is required to exhale as the lungs can no longer passively recoil and deflate. Anoticeable and exhausting muscular effort is required for each exhalation. Thus a person with emphysema exhales slowly. 1. Using this information, predict what lung values will change in the spirogram when the patient with