Pulmonary USMLE Step 1 - Ventilation and Perfusion - Boards and Beyond

Ventilation and Perfusion can be difficult to understand at first. In this video from the Pulmonary section of Step 1-Preclinical, Dr. Ryan explains the important concept of dead space, as well as the A-a gradient, shunts, and V/Q mismatch.
Each Step 1-Preclinical video has associated USMLE-style questions that can be used as a post-video review as shown below. All questions are also available for members to build custom quizzes with through the Step 1-Preclinical question bank.
Go to www.boardsbeyond.com/step-1-p to learn more.
For additional free samples, go to: www.boardsbeyond.com/samples.
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[@tylerjessel1583]

If you breath 500cc per minute you would be dead. On your Alveolar Ventilation Equation slide minute ventilation should equal 500cc (tidal volume) x RR. With each tidal volume partitioned into 150cc dead space and 350cc available for gas exchange. Thus alveolar ventilation should equal 350cc x RR if my math is correct.

[@darkness833]

You are right.ur alv vent is (tv minus dead space) x RR. And avarage tv is around 6-8ml x kg

[@ShahsawarM]

yes, its 500 ml for each breath taken not per minute. 12-20 breaths per minute, so 6L/min or 4.2L/min for alveolar ventilation

[@AlexJoe-ve6gc]

I have failed this 2 times and my emotions go in waves, i think passing SMLE STEP 1 is not meant for people like me 😭 😢 😕 😐 😔 💔 😭 😢 😕 😐 😔

[@MyrnaYoung-cz4em]

Passing the test is a challenging and frustrating experience. I believe that it's not just about studying, but also about having God's grace to succeed.

[@williamsanthony5554]

It's true.