FRC Resp. question... - USMLE Forums
USMLE Forums Logo
USMLE Forums         Your Reliable USMLE Online Community     Members     Posts
Home
USMLE Articles
USMLE News
USMLE Polls
USMLE Books
USMLE Apps
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


Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 03-19-2015
SRI101's Avatar
USMLE Forums Scout
 
Steps History: Step 1 Only
Posts: 40
Threads: 6
Thanked 6 Times in 6 Posts
Reputation: 16
Default FRC Resp. question...

In pathoma ... In obstructive disease ex. Emphysema the FRC is going to be reset and its going to be increased because of the loss of elasticity. So when they mean increase in FRC does it mean that it goes from -5 to -8 ?

In restrictive disease the FRC decreases so does it mean -5 to -3 ?

Thanks in advance.
Reply With Quote Quick reply to this message



  #2  
Old 03-19-2015
Hassan8's Avatar
USMLE Forums Addict
 
Steps History: Step 1 Only
Posts: 142
Threads: 27
Thanked 51 Times in 33 Posts
Reputation: 61
Default

Dont quite get your question. -5 to -8 are you referring to intra pleural pressure? FRC is increases in restrictive diseases yes but thats measured in 'ml' normal value is 2700ml
Reply With Quote Quick reply to this message
  #3  
Old 03-19-2015
Hassan8's Avatar
USMLE Forums Addict
 
Steps History: Step 1 Only
Posts: 142
Threads: 27
Thanked 51 Times in 33 Posts
Reputation: 61
Default

Sorry correction obstructive disease. Its increased in obstructive disease . emphysema is an obstructive disease .
Reply With Quote Quick reply to this message
 
  #4  
Old 03-19-2015
USMLE Forums Veteran
 
Steps History: Not yet
Posts: 202
Threads: 19
Thanked 47 Times in 43 Posts
Reputation: 57
Default

Quote:
Originally Posted by SRI101 View Post
In pathoma ... In obstructive disease ex. Emphysema the FRC is going to be reset and its going to be increased because of the loss of elasticity. So when they mean increase in FRC does it mean that it goes from -5 to -8 ?

In restrictive disease the FRC decreases so does it mean -5 to -3 ?

Thanks in advance.
yes any pathology that decreases the ability to build a positive alveolar pressure = obstructive disease. so in ur ques if its going from -5 to - 8 and not able to build a positive pressure during expiration the air will be trapped in alveoli and thus cause increase in all volumes, including FRC
Reply With Quote Quick reply to this message
The above post was thanked by:
SRI101 (03-19-2015)
  #5  
Old 03-19-2015
SRI101's Avatar
USMLE Forums Scout
 
Steps History: Step 1 Only
Posts: 40
Threads: 6
Thanked 6 Times in 6 Posts
Reputation: 16
Default

Thanks ... In normal math I was thinking that increase would be from -5 to -3 ( like increase would be to get closer to positive ) thats why i had this doubt.
Reply With Quote Quick reply to this message



Reply

Quick Reply
Message:
Options

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:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
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.
Location
Where you live. Leave blank if you don't want to tell.

Log-in

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
Airway Pressures at FRC flowerlady USMLE Step 1 Forum 6 01-29-2016 12:28 AM
why resp. alk in COPD medicalbiology USMLE Step 2 CK Forum 2 12-01-2014 04:58 AM
resp alkalosis in restrictive diseases?? yeshwanter USMLE Step 1 Forum 1 03-27-2014 01:21 PM
can we ask male patient to remove the gown in resp or cadiac case? Short USMLE Step 2 CS Forum 1 03-07-2014 04:24 AM
Resp. alkalosis/metabolic alkalosis mohitkmc USMLE Step 1 Forum 4 12-27-2011 09:46 AM

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)