there is less deflection of the needle with the
larger gauge - particularly when the depth of soft tissue being penetrated
is significant as in the IAN
less deflection leads to greater accuracy at
reaching your target site - once again, particularly when the depth
of soft tissue being penetrated is significnt as in the IAN
while needle breakage is not a problem with
disposable needles, it is less likely to occur with larger gauge
needles
aspiration is easier and more reliable with a
larger gauge needle, particularly since it takes more pressure to
aspirate when a narrower, smaller gauge needle is being used
