Abstract: A stent graft comprising an elongate main tubular body of a biocompatible graft material is disclosed. The main tubular body comprises a main lumen, a distal end and a proximal end; and an elongate tubular bridge of a biocompatible graft material. The elongate tubular bridge extends around a portion of the main tubular body so as to form a bridging lumen bridging between two circumferentially spaced-apart openings within the main tubular body. The tubular bridge has at least two fenestrations. The tubular bridge comprises concertinaed graft material.

Abstract: A stent graft for placement in a lumen of a patient is disclosed. The stent graft comprises a main body including a main lumen and having a distal end terminating in a bifurcation. It also comprises first and second legs extending from the bifurcation, the first and second legs having respective first and second leg lumens and the first and second leg lumens being in fluid communication with the main lumen; and a side arm extending from the first leg, the side arm having a side arm lumen. The side arm lumen is in fluid communication with the first leg lumen at a position adjacent to the bifurcation. A combined lumen is formed. The combined lumen is between the main lumen and a distal portion of the first leg lumen and is bounded laterally by a portion of the side arm located adjacent to the bifurcation.

Abstract: A stent graft has a cylindrical wall, an internal lumen within the cylindrical wall and a fenestration in the wall. The fenestration is closed off by a valve arrangement to prevent the flow of liquids from within the internal lumen to outside of the wall. The valve arrangement is a tube of graft material which can be closed off by pressure on its outside surface. The end of the tube remote from the fenestration can be held shut by having its periphery fastened to a flattened resilient ring. Fluid pressure on the tube of graft material causes the tube to close off to prevent fluid flow therethrough and by resilient deflection of the resilient ring the end of the tube of graft material can be opened to enable the passing of a medical device therethrough.

Abstract: A stent graft has a tubular side arm which can be angled proximally and distally and from side to side. The wall of the stent graft in the vicinity of the side arm has a loose fold of the graft material and the side arm is fastened to the loose fold of graft material. The tubular side arm has an inner end and an outer end and is fastened into the loose fold of graft material by a circumferential fastening around the tubular side arm between the inner end and the outer end so that the tubular side arm extends partially within the tubular body of the stent graft and partially outside the tubular body of the stent graft. The loose fold of graft material can be formed by the graft material defining a recess in the wall of the stent graft. To enable movement or angulation proximally and distally and from side to side the loose fold of graft material is provided both proximally and distally of the tubular side arm and circumferentially to each side of the tubular side arm.

Abstract: A temporary diameter reduction constraint arrangement for a stent graft is disclosed. The arrangement comprises: primary and secondary release wires extending along the graft; a plurality of loops of thread, each loop engaged with either the primary or secondary wire and engaged around a portion of the graft circumferentially spaced away from its release wire, and drawn tight to reduce the diameter of the graft; an end constraint arrangement comprising four of the plurality of loops of thread arranged into a first and second pairs engaged with respective primary and secondary wires; and an intermediate constraint arrangement comprising a fifth and sixth of the plurality of loops of thread arranged into a third pair, the third pair engaged with the primary release wire, the primary release wire deviating towards the secondary release wire so as to locate the intermediate constraint arrangement substantially in-line with the end constraint arrangement.

Abstract: A temporary diameter reduction constraint arrangement for a stent graft is disclosed. The arrangement comprises: primary and secondary release wires extending along the graft; a plurality of loops of thread, each loop engaged with either the primary or secondary wire and engaged around a portion of the graft circumferentially spaced away from its release wire, and drawn tight to reduce the diameter of the graft; an end constraint arrangement comprising four of the plurality of loops of thread arranged into a first and second pairs engaged with respective primary and secondary wires; and an intermediate constraint arrangement comprising a fifth and sixth of the plurality of loops of thread arranged into a third pair, the third pair engaged with the primary release wire, the primary release wire deviating towards the secondary release wire so as to locate the intermediate constraint arrangement substantially in-line with the end constraint arrangement.

Abstract: A stent graft for placement in a lumen of a patient is disclosed. The stent graft comprises a main body comprising a main lumen and having a distal end terminating in a bifurcation. It also comprises first and second legs extending from the bifurcation, the first and second legs having respective first and second leg lumens and the first and second leg lumens being in fluid communication with the main lumen; and a side arm extending from the first leg, the side arm having a side arm lumen. The side arm lumen is in fluid communication with the first leg lumen at a position adjacent to the bifurcation. A combined lumen is formed. The combined lumen is between the main lumen and a distal portion of the first leg lumen and is bounded laterally by a portion of the side arm located adjacent to the bifurcation.

Abstract: A temporary diameter reduction constraint arrangement for a stent graft is disclosed. The arrangement comprises: primary and secondary release wires extending along the graft; a plurality of loops of thread, each loop engaged with either the primary or secondary wire and engaged around a portion of the graft circumferentially spaced away from its release wire, and drawn tight to reduce the diameter of the graft; an end constraint arrangement comprising four of the plurality of loops of thread arranged into a first and second pairs engaged with respective primary and secondary wires; and an intermediate constraint arrangement comprising a fifth and sixth of the plurality of loops of thread arranged into a third pair, the third pair engaged with the primary release wire, the primary release wire deviating towards the secondary release wire so as to locate the intermediate constraint arrangement substantially in-line with the end constraint arrangement.

Abstract: A stent graft (10) has a tubular body with a side aperture (16) covered by a valve arrangement (18) and an arrangement to hold the valve open (32) with a release wire (30). Retraction of the release wire closes the valve. The stent graft can have a tubular body with a first bifurcation (134) with first and second legs (130, 132) extending from the bifurcation. The side aperture and valve arrangement can be in one of the legs. One of the legs (132) has a further bifurcation (142) to define a side arm (140). The stent graft can be deployed into the vasculature of a patient with the tubular body being in an aorta of the patient, a first leg extending down an iliac artery, a second leg being directed towards a contralateral iliac artery and the side arm directed to an internal artery of the contralateral iliac artery.

Abstract: A stent graft (10) has a tubular body with a side aperture (16) covered by a valve arrangement (18) and an arrangement to hold the valve open (32) with a release wire (30). Retraction of the release wire closes the valve. The stent graft can have a tubular body with a first bifurcation (134) with first and second legs (130, 132) extending from the bifurcation. The side aperture and valve arrangement can be in one of the legs. One of the legs (132) has a further bifurcation (142) to define a side arm (140). The stent graft can be deployed into the vasculature of a patient with the tubular body being in an aorta of the patient, a first leg extending down an iliac artery, a second leg being directed towards a contralateral iliac artery and the side arm directed to an internal artery of the contralateral iliac artery.

Abstract: A reinforcing and marker ring for a stent graft is disclosed. The reinforcing and marker ring comprises a plurality of turns of a substantially inextensible resilient wire in a circular shape and terminal ends at each end of the wire. The terminal ends each comprise a loop, each loop attachable to a stent graft having an opening or a fenestration so as to substantially lock a peripheral length of the circular shape. A marker winding is wound helically around the reinforcing wire, the marker winding being viewable on an image display system employing electromagnetic radiation so as to indicate the location of a periphery of the fenestration. The circular shape of the resilient wire, with the marker winding wound around it, is collapsible under radial pressure to form a squashed circular shape for loading into a delivery device, the squashed circular shape self-expandable back to a substantially circular shape upon release from the delivery device.

Abstract: A stent graft has a tubular side arm which can be angled proximally and distally and from side to side. The wall of the stent graft in the vicinity of the side arm has a loose fold of the graft material and the side arm is fastened to the loose fold of graft material. The tubular side arm has an inner end and an outer end and is fastened into the loose fold of graft material by a circumferential fastening around the tubular side arm between the inner end and the outer end so that the tubular side arm extends partially within the tubular body of the stent graft and partially outside the tubular body of the stent graft. The loose fold of graft material can be formed by the graft material defining a recess in the wall of the stent graft. To enable movement or angulation proximally and distally and from side to side the loose fold of graft material is provided both proximally and distally of the tubular side arm and circumferentially to each side of the tubular side arm.