Spirometry, Lung Volumes, Minute Ventilation, Alveolar Ventilation, Dead Space Step 1

*** At 4:34-4:35 I accidentally said that tidal volume is .5 mL, which was a slip of the tongue and a mistake on my part. What I meant to say is that the tidal volume is 500 mL, which is equal to .5 liters. Normal Physiologic Changes in Pregnancy: The increased minute ventilation during pregnancy causes a compensated respiratory alkalosis. Inspiratory capacity increases by 15% during the third trimester because of increases in tidal volume and inspiratory reserve volume. The respiratory rate does not change during pregnancy, but the TV is increased which increases the minute ventilation, which is responsible for the respiratory alkalosis in pregnancy. Functional residual capacity is reduced to 80% of the non-pregnant volume by term. These combined lead to subjective shortness of breath during pregnancy. Spirometry, Lung Volumes, Minute Ventilation, Alveolar Ventilation, Dead Space, USMLE Step 1, First Aid 2015, First Aid 2014, USMLE HELP, STEP 1 Help, dead space, (Disclaimer: The medical information contained herein is intended for physician medical licensing exam review purposes only, and are not intended for diagnosis of any illness. If you think you may be suffering from any medical condition, you should consult your physician or seek immediate medical attention.)



Nature Breeze: Thank you sooooooooooooooooooooooooooooooooooooooooooooooo much

Tamika Hawkins: I love this video! very helpful and ties in what I learned in the classroom. Thank you for being so clear