Physioex 8.0 Respiratory Lab

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Respiratory System Mechanics Simulation Lab

Activity 1:

MRV __7500__ ml/min =500 tv x 15bmp

Does expiratory reserve volume include tidal volume? Explain.  Expiratory reserve volume (ERV) does not include tidal volume. Expiratory reserve volume is the amount of air that can be expelled after a normal tidal exhalation. This means that tidal volume is not included in the ERV measurement.

Activity 2:

FEV1, as % of VC
Radius
FEV1
Vital Capacity
FEV1%
5.00
3541
4791
73.90
4.50
2303
3143
73.27
4.00
1422
1962
72.47
3.50
822
1150
71.47
3.00
436
621
70.20

What happened to FEV1 (%) as the radius of the airways was decreased? Explain. FEV 1 (%) will decrease as the airway radius is decreased. FEV 1 (%) is the amount of air that can be expelled from the lungs in one second during forced expiration. If the airway becomes smaller, then the resistance to airflow will increase and FEV 1 (%) will become lower.

Activity 3:

How has the air flow changed with surfactant compared to the baseline run? FEV 1 (%) decreases as the radius of the airway is decreased. Airflow increases when surfactant is applied because the resistance to lung inflation has been reduced.

Premature infants often have difficulty breathing. Explain why this might be so, referring to your text if necessary. Surfactant is not produced in premature infants. Because surfactant is necessary for the lungs to inflate, it is not normally needed until birth.

Activity 4:

What happened to the lung in the left side of the bell jar?
The lung in the left side of the bell jar deflated. The pressure in the left lung was zero and the pressure in the right lung changed constantly.

How did the pressure in the left lung differ from that in the right lung? Explain. Because there was an opening to the atmosphere in the left side of the bell jar, air moved into the intrapleural space through the opening, which is the path of least resistance, causing intrapleural pressure...
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