• Home
  • USMLE Step 1 Review
  • USMLE Step 2 Review
  • USMLE Step 3 Review
  • Audio Samples
  • Contact
You are here: Home / GS Step 1 Prep / Respiratory Physiology 1 / 60 10 Relationship between Lung Capacities and Volumes / USMLE Step 1 Respiratory Physiology Review 60 10 Relationship between Lung Capacities and Volumes

USMLE Step 1 Respiratory Physiology Review 60 10 Relationship between Lung Capacities and Volumes

On these “Gold Standard Step 1 Facts” pages you will find Free:

  • USMLE Audio Review files from our “Gold Standard USMLE Reviews”
  • Transcriptions of those files
  • And videos (as they become available)

The idea is that you can review for the USMLE online by:

  • Listening to the Audio
  • Following along with the transcription
  • Or by watching the video (if available)

If you like what you here, you can purchase the entire Gold Standard Step 1 MP3 audio USMLE review for your iPhone, iPod, or computer here.

Let’s start our USMLE Review with Anatomy from the Gold Standard USMLE Step 1 Audio Review program.

Play USMLE Audio MP3 60 10 Relationship between Lung Capacities and Volumes Below

http://boardprep.net/wp-content/uploads/51-10-Relationship-B_T-Lung-Capacities-Volumes.mp3

Begin 60 10 Relationship between Lung Capacities and Volumes Transcription

As a rule, any lung capacity can be expressed as the sum of two or more of the lung volumes. For example, how can total lung capacity be expressed in terms of lung volume?

  • TLC is the sum of all four lung volumes. That is, tidal volume plus IRV plus ERV plus residual volume.

For each of the following lung volumes, give the percent of normal total lung capacity that it represents.
First, normal tidal volume.

  • About 8.3% of total lung capacity.

Second, normal inspiratory reserve volume.

  •  About 55% of total lung capacity. 

Third, normal expiratory reserve volume.

  • About 16.7% of total lung capacity.

Fourth, normal residual volume.

  • About 20% of total lung capacity.

How can the following lung capacities be defined in terms of lung volumes?
First, inspiratory capacity.

  • Inspiratory capacity is tidal volume plus inspiratory reserve volume.

Second, vital capacity.

  • Vital capacity is expiratory reserve volume plus tidal volume plus inspiratory reserve volume.

Third, functional residual capacity.

  • FRC is residual volume plus expiratory reserve volume.

Why is residual volume, that is, the air that can never be expelled included in functional residual capacity?

  •  Residual volume mixes with incoming air via turbulence and so is reasonably well oxygenated. Another way of looking at vital capacity is that it’s everything but residual volume.

Student doctor please pause the tape and summarize what we’ve discussed about the relationship between lung capacities and lung volumes.

  • Any of the four lung capacities can be expressed as the sum of two or more of the lung volumes. For example, total lung capacity is the sum of all four lung volumes – tidal volume plus inspiratory reserve volume plus expiratory reserve volume plus residual volume. Normal tidal volume is about 8.3% of total lung capacity. Normal inspiratory reserve volume about 55%. Normal expiratory reserve volume about 16.7% and normal residual volume is about 20% of total lung capacity. Inspiratory capacity is tidal volume plus inspiratory reserve volume. Functional residual capacity is residual volume plus expiratory reserve volume. Residual volume is included in functional residual capacity because even though the residual volume is the volume of air that can never be expelled, it is mixed with incoming air via turbulence and so is reasonably well oxygenated. Vital capacity is expiratory reserve volume plus tidal volume plus inspiratory reserve volume. Another way of looking at vital capacity is that it is everything but residual volume.

 

****END OF TRANSCRIPTION****

Want More USMLE Step 1 Review Facts?

  • Download the complete 82 Hour Gold Standard USMLE Step 1 Audio Review Here
  • Find the complete list of Gold Standard Step 1 USMLE Facts Here

boardprep.net

 

 

Filed Under: 60 10 Relationship between Lung Capacities and Volumes, Respiratory Physiology 1 Tagged With: Audio, Board, Board Prep, Capacities, Gold Standard, Lung, Lung Capacities, MP3, Respiratory Physiology 1, USMLE, USMLE 1, USMLE Step 1, USMLE Step One, Video, Volumes

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

USMLE Board Preperation Gold Standard Board Preparation USMLE review material is approved for distribution through local American Medical Student Association chapters, and endorsed by the Student Osteopathic Medical Association for distribution through their local chapters.

GET THE COMPLETE USMLE REVIEW AUDIO SERIES!

USMLE Step 1


USMLE Step 2


USMLE Step 3

  • Home
  • About Us
  • Sample Audio
  • Medical Prep Posts
  • Refund Policy
  • Sitemap

Thank you for your support!

Gold Standard Board Preparation Systems website is in the process of redesigning and upgrading this website for improved usability. Your satisfaction is our top priority!

Copyright © Gold Standard Board Preparation Systems

Contact Us

powered by Digital Power Studio

This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish.AcceptReject
Privacy & Cookies Policy