An improved dilatation catheter is described which has an oblong transverse cross-section along essentially its entire length and a stiffening mandrel extending within the proximal section and a part of the distal portion. In a presently preferred embodiment, the large dimension of the proximal section...http://www.google.com/patents/US5868706?utm_source=gb-gplus-sharePatent US5868706 - Catheter with reinforced oblong transverse cross section
