When a needle is appropriately connected to a needle housing having a side arm, {TAIL ~ the inventive probe} can be inserted through {HEAD ~ the channel} in the side arm and housing and into and through the needle to an appropriate position near the proximal end of the needle 
When a needle is appropriately connected to a needle housing having a side arm , { TAIL ~ the inventive probe } can be inserted through { HEAD ~ the channel } in the side arm and housing and into and through the needle to an appropriate position near the proximal end of the needle
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH