SPENCER, Ind.--(BUSINESS WIRE)--Cook Urology, a division of Cook Medical, the world’s largest private medical device company, is further advancing the treatment of kidney stones with the introduction of the 1.5 French NCircle Tipless Stone Extractor. Utilizing Cook’s revolutionary nitinol tipless technology, the 1.5 French NCircle offers physicians unrivalled flow and deflection; enabling the capture of even the most challenging kidney or ureteral stones to render patients stone free.