Wednesday, 28 October 2015

xrayoftheweek 43: that's not a USB it?

The #xrayoftheweek is this chest x-ray. What is that device projected over the left side of the chest? Is it a USB stick left in the shirt pocket? Or is it something else?

This is not a USB stick. USB sticks characteristically have a a male "A plug" which plugs into USB ports, and 2 small holes - read this Radiopaedia article by Dr Matt Bull (famous for naming the manta ray sign): this is what a USB stick looks like:

Case courtesy of Dr Matthew Bull,, rID: 30286

The CXR above shows a REVEAL device - an implantable loop recorder device. They are placed subcutaneously and monitor the cardiac rhythm and are used to investigate unexplained fainting episodes to assess for an underlying cardiac rhythm abnormality.