COPD patient - 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 02-14-2013
USMLE Forums Scout
Steps History: Not yet
Posts: 17
Threads: 17
Thanked 0 Times in 0 Posts
Reputation: 10
Lungs COPD patient


"Supplementary O2 must be cautious in patient with COPD because hypoxia drives their respiratory function (where in normal undivisual, the pCO2 medicates the resp. drive) UW"

Can anyone help me to understand this:
How does hypoxia drive their resp. function in patient with COPD ?

Reply With Quote Quick reply to this message

Old 02-18-2013
USMLE Forums Master
Steps History: 1+CK+CS
Posts: 514
Threads: 66
Thanked 138 Times in 123 Posts
Reputation: 148
Default COPD

Because in COPD you get chronically elevated CO2 levels in the blood and that chronically stimulated the respiratory center and sensitizes it. then what happens is that CO2 is no longer the driving force behind respiration.So Instead O2 becomes the driving force.By giving 100% O2 you will get respiratory depression.Hope that helps.
Reply With Quote Quick reply to this message
The above post was thanked by:
ha000mo (02-19-2013)
Old 02-18-2013
USMLE Forums Scout
Steps History: ---
Posts: 75
Threads: 12
Thanked 60 Times in 31 Posts
Reputation: 70

I think Water (above me) answers your question...but, just in case you still need further clarification...I'll try to explain it in another way. =)

--- In COPD patient, have high CO2 bc something is obstruction the airway, therefore, the PO2 <60 mmhg. Because the PO2 is low, itís a good thing for COPD, bc it allows the peripheral chemoreceptors to kick on to make you breath in and out.

--- Should not give oxygen mask to COPD patient bc low PO2 cause you to breathÖif you give the pt an oxygen cut out the ptís own drive to breath..and the pt canít breath in or out on their own..and thus not allowing the peripheral chemoreceptors to work appropriately.
Reply With Quote Quick reply to this message
The above post was thanked by:
water (02-19-2013)


Acid-Base-, Respiratory-

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
COPD patient MedicalExaminer USMLE Step 1 Forum 10 10-22-2012 02:21 PM
COPD rupesh USMLE Step 1 Forum 4 10-22-2012 03:47 AM
Treatment of COPD chienpolska USMLE Step 2 CK Forum 2 02-26-2012 01:40 PM
Pulmonary Function Test in this COPD patient! ag2011n USMLE Step 2 CK Forum 5 09-19-2011 10:10 AM
Initial measure for COPD patient! aghammoud85 USMLE Step 2 CK Forum 4 05-31-2011 04:00 PM

RSS Feed
Find Us on Facebook
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2016 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)