Title: Carbon Monoxide Poisoning from Kinjal Sethuraman<br/>Author: Michael Bond<br/><a href='http://umem.org/profiles/faculty/78/'>[Click to email author]</a><hr/><div style="font-family:arial,sans-serif;font-size:13px">
Carbon Monoxide is a odorless but deadly gas. It is important to note that CO has an elimination half-life and it varies under different conditions.</div>
<div style="font-family:arial,sans-serif;font-size:13px">
</div>
<div style="font-family:arial,sans-serif;font-size:13px">
When evaluating a patient, we can calculate backwards to determine the COHb level at time of exposure in an acute event. </div>
<p>
<span style="font-family:arial,sans-serif;font-size:13px"><b>Carbon Monoxide Half-Life:</b></span></p>
<ul>
<li style="font-family: arial,sans-serif; font-size: 13px;">
<b>Average elimination on room air: 5-6 hours</b></li>
<li style="font-family: arial,sans-serif; font-size: 13px;">
<b>100% Oxygen: 70-130 minutes</b></li>
<li style="font-family: arial,sans-serif; font-size: 13px;">
<b>100% Oxygen under hyperbaric conditions at 3 ATA: 23 minutes</b></li>
</ul>
<div>
<span style="font-family:arial,sans-serif;font-size:13px">There is NO need to recheck COHb level again after initial level because it will be lower- (except in the case of Methylene Chloride exposure).</span></div>