Disposable intra-arterial augering and dottering-instruments for use in patients in clearing pathways at obstructed or nearly obstructed arterial sites are disclosed. A number of augering tips used on the instruments are disclosed along with a method for releasibly affixing augering tips to the instruments....http://www.google.ca/patents/US5746758?utm_source=gb-gplus-sharePatent US5746758 - Intra-artery obstruction clearing apparatus and methods
