摘要:
A stent is configured to extend across a scalloped fenestration (44) located at an end of a main tubular body (32) of a biocompatible graft defining a main lumen of a stent graft (6). The scalloped fenestration (44) has a perimeter edge including side edges and an end between the side edges. The stent comprises first and second stent struts configured to extend along the side edges of the scalloped fenestration (44) and a zigzag strut element connected between the first and second stent struts and configured to extend across the end of the scalloped fenestration.
摘要:
A pre-loaded delivery device (2) that facilitates accurate placement of a stent graft assembly (6) in the aorta is disclosed. A stent graft (6) is carried on the delivery device (2) and held in a pre-deployment configuration by a sheath (10). A split (13) in the sheath (10) facilitates the pre-cannulation of one or more branch arteries extending from the aorta before the stent graft (6) is fully released in the aorta. The stent graft (6) comprises a tubular body (32) having at least one scalloped fenestration (44) formed in one end of the graft material and at least one fenestration (42) formed in the graft material of the main tubular body (32). A helical internal side branch (56) extends from the fenestration (42) within the lumen of the main tubular body. The helical side branch (56) is configured to curve at least partially around the scalloped fenestration (44). The assembly further comprises a connection stent graft (54) extending from the fenestration (42) into a branch vessel.
摘要:
A multi-element, bioresorbable, vascular stent may be used to maintain or enhance patency of a blood vessel. The stent may be used in peripheral blood vessels, which may be long and/or tortuous. By using multiple, separate stent elements that are balloon expandable, the multi-element stent may be stronger than a traditional self-expanding stent but may also be more flexible, due to its multiple-element configuration, than a traditional balloon-expandable stent. Thus, the multi-element, bioresorbable, vascular stent described herein may be particularly advantageous for treating long lesions in tortuous peripheral blood vessels.
摘要:
A system for delivering a surgical staple can include various components. The system may include an elongate body with a proximal end, a distal end, and a plurality of delivery platforms disposed adjacent the distal end. A sheath can move relative to the elongate body from a first position in which the distal end of the sheath is disposed distally of a distal-most distal delivery platform to a second position in which the distal end of the sheath is disposed proximally of at least one delivery platform. A plurality of intravascular tacks can be within the system with each disposed about a corresponding delivery platform.
摘要:
A suture to be used in producing a medical instrument provided with a sutured site such as a stent graft, an artificial blood vessel or an artificial heart valve, namely, a suture for sewing a medical instrument. The suture comprises two components, i.e., a high melting-point component and a low-melting point component, the difference between the melting points of components being 30°Cor more and the low-melting point component is exposed on the suture surface entirely along the length direction. The suture is, for example, a multifilament yarn comprising a combination of a high melting-point filament (3) with a low-melting point filament (4) shown in Fig.2 or a composite filament comprising the high melting-point component and the low-melting point component, or a yarn wherein the high melting-point component is coated with the low-melting point component. When a medical material formed of a fabric or a film is sutured or knotted with the suture and then the suture site is heated at such a temperature allowing not the high-melting point component but the low-melting point component alone to melt, the sutured site is fused and fixed. Thus, a knot or a seam, which sustains the fiber shape and strength and never becomes loose, can be formed.
摘要:
A medical lumen-expansion balloon may include a generally cylindrical central body (231) between first (234) and second (236) body end portions, a low-profile unexpanded first state and a radially-expanded second state, wherein the first body end portion (234) is constrained by fiber material (235) such that it will not expand longitudinally and circumferentially beyond a predetermined size, and the central body is constrained by fiber material (237) so as to be circumferentially substantially noncompliant, but is longitudinally compliant, such that it will elongate with increased volume but will not substantially radially expand.