Abstract: A dilatation catheter, in particular for expanding constrictions in coronary vessels, includes a balloon (2) capable of being enlarged by injecting a fluid through a tube (3). The tube (3) is arranged laterally offset from a segment of flexible tubing (7) by which a passage (8) for a guide wire (1) is formed in the balloon (2).

Abstract: A dilation catheter is provided with an inflatable balloon which can be made to advance into a narrowed coronary artery along a guide wire placed by a guide catheter. An inflating tubular body is provided for expanding the balloon, which consists of a hose-like outer skin to which is connected, at the axially oriented edges, an inner skin also having a hose-like shape. Between the inner skin and the outer skin is a balloon interior space which surrounds an open central lumen extending axially through the balloon and ensures during dilatation a constant flow of blood into the coronary artery.

Abstract: A dilatation catheter, in particular for expanding constrictions in coronary vessels, includes a balloon (2) capable of being enlarged by injecting a fluid through a tube (3). The tube (3) is arranged laterally offset from a segment of flexible tubing (7) by which a passage (8) for a guide wire (1) is formed in the balloon (2).