Endovascular delivery system with flexible and torqueable hypotube

An endovascular delivery system, comprising:

• an elongate outer tubular sheath having an open lumen and opposed proximal and distal ends with a medial portion therein between, the proximal end of the outer tubular sheath securably disposed to a first handle;
• an elongate inner metallic hypotube having a tubular wall with an open lumen and opposed proximal and distal ends with a medial portion therein between, the hypotube having a longitudinal length greater than a longitudinal length of the outer tubular sheath, the hypotube being slidably disposed within the open lumen of the outer tubular sheath, the proximal end of the hypotube securably disposed to a second handle, wherein said second handle comprises an inflation material fill port;
• a delivery guide wire slidably disposed within the hypotube, a distal end of the delivery guidewire including an inflatable endovascular prosthesis releasably disposed thereat, said distal end of the delivery guidewire and said endovascular prosthesis being disposed past and beyond the distal end of the hypotube;
• an inflation tube extending from the inflation material fill port and disposed within the hypotube;
• a distal cap securably disposed at the distal end of the hypotube through which the inflation tube and the delivery guide wire passes there through to exit the hypotube;
• the distal end of the outer tubular sheath being slidably disposed past and beyond the distal end of the hypotube to define an endovascular prosthesis delivery state and slidably retractable to the medial portion of the hypotube to define an endovascular prosthesis unsheathed state;
• wherein the hypotube further comprises:
• a first flexible portion disposed from about the distal end of the hypotube to about the medial portion of the hypotube;
• a second portion disposed from about the medial portion of the hypotube to about the proximal end of the hypotube;
• the first flexible portion of the hypotube comprising a plurality of slots extending through the tubular wall of the hypotube, said slots having a circumferential arc about the tubular wall from about 150° to about 300°;
• at least one first elongate longitudinal slot disposed at the distal end of the hypotube;
• at least one second elongate longitudinal slot disposed at the proximal end of the hypotube;
• wherein adjacent slots are axially offset from one and the other from about 30° to about 60;
• wherein, when the hypotube is disposed within the outer tubular sheath, the hypotube has a torqueability from about 70% to about 100%, said torqueability being measured as percent of rotation of the distal end of the hypotube for a rotation amount at the proximal end of the hypotube when placed on tortuous path;
• and
• wherein the at least one first elongate longitudinal slot securably aligns the distal end of the hypotube to the distal cap and the at least one second elongate longitudinal slot securably aligns the proximal end of the hypotube to the second handle, thereby keeping the inflation material fill port in plane with the hypotube.