Lung and Arterial Compliance and Elasticity! - USMLE Forums
USMLE Forums Logo
USMLE Forums         Your Reliable USMLE Online Community     Members     Posts
USMLE Articles
Go Back   USMLE Forums > USMLE Step 1 Forum

USMLE Step 1 Forum USMLE Step 1 Discussion Forum: Let's talk about anything related to USMLE Step 1 exam

Thread Tools Search this Thread Display Modes
Old 05-03-2013
USMLE Forums Newbie
Steps History: ---
Posts: 2
Threads: 2
Thanked 0 Times in 0 Posts
Reputation: 10
Question Lung and Arterial Compliance and Elasticity!

can u please elaborate n make my concept more clear by explaining two statements as below

a) pulmonary compliance increases with advancing age as elasticity decreases with age

b) arterial compliance decreases with age becoming stiff thus their elasticity increase with age?

kindly comment briefly on statement b as if pulmonary n arterial compliances are different things
Reply With Quote Quick reply to this message

Old 05-03-2013
USMLE Forums Master
Steps History: 1+CK+CS+3
Posts: 1,109
Threads: 31
Thanked 521 Times in 394 Posts
Reputation: 540

First of all know that elasticity is ability for the tissue to recoil back after stretch. So tissue that recoil back easily after stretch have higher elasticity. Elasticity is inversely related to compliance.
A. As we age we predispose lung to fibrosis be it from life style; smoking or infection. A fibrous lung is so stiff and cannot recoil easily when stretched making elasticity low so compliance increases.

B. yes that is true. in the arteries elasticity is due to muscular strength so arteries have higher elasticity than veins. If u compare adult arteries to a child's artery which one would have more muscle or muscles well developed? Obviously the adult. so adult artery can recoil faster or higher when stretched so have higher elasticity and so lower compliance.

This is how I understand it. Hope it helps.
In USMLE, “Any fool can know. The point is to understand.”
Reply With Quote Quick reply to this message
The above post was thanked by:
DR.PRO (05-03-2013), sohaibamjad (05-04-2013)



Quick Reply

Register Now

In order to be able to post messages on the USMLE Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Medical School
Choose "---" if you don't want to tell. AMG for US & Canadian medical schools. IMG for all other medical schools.
USMLE Steps History
What steps finished! Example: 1+CK+CS+3 = Passed Step 1, Step 2 CK, Step 2 CS, and Step 3.

Choose "---" if you don't want to tell.

Favorite USMLE Books
What USMLE books you really think are useful. Leave blank if you don't want to tell.
Where you live. Leave blank if you don't want to tell.


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Increasing the Patient's Compliance? tyagee USMLE Step 1 Forum 7 06-29-2012 10:23 PM
How surfactant increases compliance? mycoplasma USMLE Step 1 Forum 6 05-20-2012 07:54 AM
Lung Compliance Curves! INCOGNITO USMLE Step 1 Forum 24 06-14-2011 11:21 AM
Arterial PO2 decreases with chronic lung disease because physiologic shunt decreases O2 extraction ratio DoctorB USMLE Step 1 Forum 3 03-27-2011 12:27 PM

RSS Feed
Find Us on Facebook
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

USMLE® & other trade marks belong to their respective owners, read full disclaimer
USMLE Forums created under Creative Commons 3.0 License. (2009-2014)