W8_ Pulmonary Postlab

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W8: Pulmonary BIOS 443 Pulmonary Lab Name : _____________________________________________________________________ Lab Section : ___________ I. Pulmonary Function I (L12) 1. Volume and Capacity Measurements: Complete Table 12.1 with the requested measurement results, and calculate results per the formulas provided. For calculating the capacities, use the calculated average volume for TV and the volumes from the “Measured Results” column for IRV, ERV, and RV. *For FRC, you can just calculate (and skip measure). Table 12.1: Resting Pulmonary Ventilation Measurements Volume/Capacity (Liters) Measured Result Calculated Result Tidal Volume (TV) Ch. 2 - P-P Cycle 3 inhale: Average TV = (Cycle 3 inhale + Cycle 3 exhale + Cycle 4 inhale + Cycle 4 exhale) / 4 Cycle 3 exhale: Cycle 4 inhale: Cycle 4 exhale: Inspiratory Reserve Volume (IRV) Ch. 2 - Delta Expiratory Reserve Volume (ERV) Ch. 2 - Delta Residual Volume (RV) Ch. 2 - Min Inspiratory Capacity (IC) Ch. 2 - Delta TV + IRV Expiratory Capacity (EC) Ch. 2 - Delta TV + ERV Functional Residual Capacity (FRC) Ch. 2 – Min (OR just calculate)* RV + ERV Total Lung Capacity (TLC) Ch. 2 - Max TV + IRV + ERV + RV 2. How would the volume measurements collected in Table 12.1 change if data were

W8: Pulmonary BIOS 443 collected after vigorous exercise? 3. Vital Capacity A) Predicted : Use the equation below to calculate the Predicted Vital Capacity using your subject’s approximate height and age. Equations for Predicted Vital Capacity (Kory, Hamilton, Callahan: 1960)* Male VC = 0.052H - 0.022A - 3.60 Female VC = 0.041H - 0.018A -2.69 * Vital capacities are dependent on other factors besides age and height. Therefore 80% of predicted values are still considered normal. VC = vital capacity in liters; H = height in cm; A = age in years. Show your work : Predicted VC: ______________ Liters B) Observed vs. Predicted : What is the ratio of the Subject’s Observed Vital Capacity to Predicted Vital Capacity as a percentage? Use the measured result from Table 12.1 for Observed Vital Capacity. Show your work : ( Observed VC / Predicted VC ) x 100% = ___________ % 4. Explain how at least 2 factors might affect lung capacity. Pulmonary Function II (L13) 5. Determining Forced Expiratory Volume Percentages Across Time Intervals

W8: Pulmonary BIOS 443 A) Vital Capacity (VC): Measure the vital capacity (VC) for FEV sample data using Ch. 2 and the P-P measurement tool as described in the analysis instructions. You will need this value for your FEVx calculations below, so make sure it is accurate. Vital Capacity (VC): _____________ Liters B). Forced Expiratory Volumes (FEV): Complete Table 13.1 by first measuring the forced expiratory volumes (FEVs) for each time interval, then using your vital capacity (VC) from above to calculate Forced Expiratory Volume Percentages (FEVx) across the different time intervals: FEV 1.0, FEV 2.0, and FEV 3.0. The “normal” range is also included here for later reference. Table 13.1: Forced Expiratory Volumes Time Interval (sec) Forced Expiratory Volume (L): Ch. 2 - P-P FEVx = (Measured FEV / VC) x 100% ( Calculate) Normal Adult Range 0-1 FEV 1.0 66%-83% 0-2 FEV 2.0 75%-94% 0-3 FEV 3.0 78%-97% 6. How do the subject’s FEV percentage values (FEV 1.0, FEV 2.0, FEV 3.0) compare to the averages per Table 13.1? Explain the reason. 7. Explain at least 2 factors that affect Maximal voluntary ventilation (MVV) with increased age. 8. Determining Maximum Voluntary Ventilation from Respiratory Rate and Cycle Volumes Compute Respiratory Rate Number of Cycles: Count the number (#) of full cycles within the first 12 seconds of the MVV test. If a cycle starts before the 12-second mark but ends after, do not count it. Remember that a full cycle includes a full inspiration and expiration and starts and ends along the baseline. # of cycles in the 12-second interval: ___________ cycles RR: Calculate the respiratory rate (RR) as the number of respiratory cycles per minute: RR = (Number of Cycles in 12-Second Interval) x 5 Show your work:

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W8: Pulmonary BIOS 443 Respiratory rate (RR): _________________ cycles/minute 9. Compute Average Cycle Volume A) Measures Cycle Volumes: Complete Table 13.2 with volume measurements for each individual cycle in the MVV test within the 12-second interval. Only record volumes for cycles within the 12-second interval; the table may have more cycles listed than you need. Table 13.2: Individual MVV Cycle Volumes Cycle 1 Cycle 2 Cycle 3 Cycle 4 Cycle 5 Cycle 6 Volume (L): Ch. 2 - P-P Cycle 7 Cycle 8 Cycle 9 Cycle 10 Cycle 11 Cycle 12 Cycle 13 Cycle 15 Cycle 16 Cycle 17 Cycle 18 Cycle 19 AVPC: Calculate the average volume per cycle (AVPC) by adding the volumes of all counted cycles from Table 13.2 and dividing by the number of counted cycles. AVPC = (Sum of Volumes) / (# of Counted Cycles) Show your work: Average Volume Per Cycle (AVPC): ___________ Liters/Cycle B). Compute Maximum Voluntary Ventilation MVV: Calculate the estimated maximum voluntary ventilation (MVV) by multiplying the AVPC from the previous question by the respiratory rate (RR) calculated earlier. MVV = AVPC x RR Show your work:

W8: Pulmonary BIOS 443 Maximum Voluntary Ventilation (MVV): _________ Liters/minute 10. Explain how the vital capacity, FEV1.0, and MVV would be affected in patients with Asthma before and after the intake of a bronchodilator.