摘要:
A medical grasping device (10) for vascular use, having an outer sheath (12), an elongate control member (50) extending within an outer sheath (12) to a distal tip section (54), and a proximal control assembly (22) including an actuation section (24) joined to the elongate control member (50). Adjacent to the distal tip section (54) is a grasping portion (70,70′) that is extendable from the outer sheath (12) to create loops (74,74′) for grasping a target object (T) for repositioning within the vascular system, or for removal from the patient, with loops being retractable into the outer sheath to hold the target object against the device (10) during movement of the device. Elongate control member (50) is preferably a cannula or tube having a lumen (58) extending completely therethrough for placement over a guide wire (28) already in the patient.
摘要:
A medical grasping device (10) for vascular use, having an outer sheath (12), an elongate control member (50) extending within an outer sheath (12) to a distal tip section (54), and a proximal control assembly (22) including an actuation section (24) joined to the elongate control member (50). Adjacent to the distal tip section (54) is a grasping portion (70, 70′) that is extendable from the outer sheath (12) to create loops (74, 74′) for grasping a target object (T) for repositioning within the vascular system, or for removal from the patient, with loops being retractable into the outer sheath to hold the target object against the device (10) during movement of the device. Elongate control member (50) is preferably a cannula or tube having a lumen (58) extending completely therethrough for placement over a guide wire (28) already in the patient.
摘要:
A medical grasping device (10) for vascular use, having an outer sheath (12), an elongate control member (50) extending within an outer sheath (12) to a distal tip section (54), and a proximal control assembly (22) including an actuation section (24) joined to the elongate control member (50). Adjacent to the distal tip section (54) is a grasping portion (70, 70′) that is extendable from the outer sheath (12) to create loops (74, 74′) for grasping a target object (T) for repositioning within the vascular system, or for removal from the patient, with loops being retractable into the outer sheath to hold the target object against the device (10) during movement of the device. Elongate control member (50) is preferably a cannula or tube having a lumen (58) extending completely therethrough for placement over a guide wire (28) already in the patient. One or more porous materials (120) are also provided to substantially cover at least one side of the grasping portion (74, 74′) in order to protect against distal embolization of particles which may be dislodged during a procedure using the device (10).
摘要:
A stent graft introducer has a pusher, a nose cone, a region between the pusher and the nose cone for a stent graft, a sleeve extending over the pusher and proximally to the nose cone to cover the stent graft when retained in the region. An indwelling auxiliary catheter with a pre-curved proximal end is fitted into the introducer. The nose cone has an elongate groove and the auxiliary catheter has its proximal end in the elongate groove. In a partially retracted position of the sleeve the curved proximal end of the indwelling auxiliary catheter is exposed and uncovered by the sleeve and in an advanced position of the sleeve the curved proximal end of the indwelling auxiliary catheter is straightened, extends along the length of the groove in the nose cone and is covered by the sleeve.
摘要:
A thoracic arch stent graft (1) has a tubular body of a biocompatible graft material (3) and at least one fenestration (13, 15) in the wall on one side thereof. A combination guide and tubular side arm assembly (20, 22) is mounted into the or each fenestration. The combination guide and tubular side arm assembly comprises a tubular portion (24) and a funnel portion (26) extending from a distal end of the tubular portion. The funnel portion has an angled open end. The tubular portion and the funnel portion are formed from a biocompatible graft material wall and have a lightweight space frame (38 40) formed from a resilient wire and supporting the graft material and defining the combination guide and tubular side arm assembly.
摘要:
A fenestration (32) for a stent graft (30). The fenestration is an aperture in the biocompatible graft material and has at least one flap (38, 40) of a biocompatible graft material covering the aperture on the inside whereby the flap closes off the aperture but can be displaced to allow access through the fenestration. An array of such fenestrations may be placed on a stent graft to facilitate alignment of a branch vessel with a fenestration. A slip knot (46, 46) which can be released by forcing a dilator between the flaps can be used to hold the flaps together.
摘要:
A side branch stent graft (1) suitable for the iliac arteries has a main tubular body (3) of a biocompatible graft material and a tubular side branch (5). The tubular side branch is affixed into the main tubular body so that a side branch lumen is in fluid communication with a main lumen. There is at least one external zig-zag stent (13) on the main tubular body proximal of the tubular side branch, one central external stent (14) which also encompasses the side arm, at least one external zig-zag stent (16) on the main tubular body distal of the tubular side branch and one internal zig-zag stent (15) at the distal end of the main tubular body. A reinforcing ring (9) is around the proximal end of the main tubular body and stitched thereto.
摘要:
A deployment system for introducing stent grafts which have a side arm or into which a side arm can be deployed. For instance the stent graft can be deployed into the thoracic arch of a patient. The deployment system including an introducer (1), an auxiliary catheter (13) disposed within the introducer and an auxiliary guide wire (14) disposed within the auxiliary catheter. The auxiliary guide wire extends to adjacent the proximal end (6) of the introducer and can be extended from the proximal end of the introducer so that it can be snared from a side branch artery (56) to assist with deployment of a side arm (23) of the stent graft into the side artery or for the deployment of a side arm stent graft into the stent graft.
摘要:
A multi-port stent graft delivery device (2) has an annular access lumen (26) between a delivery catheter (24) and a main sheath (6), at least one indwelling access sheath (28, 30) within the access lumen, and an indwelling guide wire (36, 38) within the or each access sheath and a stent graft (16) retained in the delivery device. Upon deployment of the stent graft into the vasculature of a patient the indwelling guide wire can be used to facilitate stabilisation of the access sheath during cathertisation of a side branch and deployment of a side arm covered or uncovered stent therein through the advanced access sheath. A manifold associated (4) with a handle provides a plurality of access ports (41, 43). A docking balloon may also be used.
摘要:
A medical grasping device (1) has an elongate control member (9) with a grasping member (17) proximal to its distal tip. An outer sheath (3) with a passageway therethrough surrounds the elongate control member and is relatively movable with respect to the control member. A control assembly (2) disposed at a proximal end of said outer sheath has a fixed handle (5) and a sliding handle (7) and the proximal end of the elongate control member is fixed to the sliding handle to move the control member. The grasping member (17) has a plurality of pre-formed wire loops (50, 52, 54, 56) which self-deploy transversely upon emerging from said distal end of said outer sheath. Each wire loop is fastened to substantially opposite sides of the elongate control member so that each of said wire loops is substantially semi-circular upon full deployment and the respective ends (27, 29) of each wire loop extend substantially in opposite directions from the elongate control member.