A safety IV cannula is an advanced medical deviA safety IV cannula is an advanced medical device used for peripheral intravenous access that incorporates an integrated shielding, locking, or retracting mechanism to protect healthcare workers from accidental needlestick injuriesce used for peripheral intravenous access that incorporates an integrated shielding, locking, or retracting mechanism to protect healthcare workers from accidental needlestick injuries.