| http://www.w3.org/ns/prov#value | - A tubular outer layer 33 of the balloon 24, formed of a porous polymeric material such as for example ePTFE, is positioned on an outer surface of the tubular inner layer 34, with aproximal impregnated section 27 of the tubular outer layer located proximal to the proximal end section of the tubular inner layer 34 and in contact with the outer tubular member 14, and with a distal impregnated section
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