A balloon dilatation catheter having a catheter shaft with an oblong transverse cross-section with one transverse dimension in a first direction being significantly larger than a second transverse dimension in a direction perpendicular to the first direction. The first dimension is about 1.1 to about...http://www.google.co.uk/patents/US6027475?utm_source=gb-gplus-sharePatent US6027475 - Catheter shaft with an oblong transverse cross-section
