It can either be built into .
It can either be threaded through a vascular catheter or endotracheal tube that delivers the bioptome directly to the desired site of tissue sample ( in this case , probably the inner walls of the heart or gastrointestinal tract ) .
It can either be built into or threaded through a vascular catheter or endotracheal tube that delivers the bioptome directly to the desired site of tissue sample ( in this case , probably the inner walls of the heart or gastrointestinal tract ) .