mobility?

<BODY BGCOLOR="white" TEXT="black" LINK="blue" VLINK="blue" ALINK="blue" > <P><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><A HREF="http://www.choicehme.com/"><H1></H1></A>. My oxygen machine is on, and there are no warnings, but the flowmeter ball won't come up to the setting my doctor prescribed. It most likely is dirty and the dust is significantly blocking airflow. <a href="http://www.yahoo.com" target="_blank"><img src="image3.gif"></a> . </FONT></P> </BODY>