摘要:
A valve assembly includes a frame, a prosthetic valve coupled to the frame, and a repositioning wire coupled to the frame. When pulled, the repositioning wire is configured to radially compress the valve assembly from a radially expanded fully deployed configuration to a radially compressed repositioning configuration. The repositioning wire includes a first end coupled to the frame and the repositioning wire extends around at least a portion of the circumference of the frame to a second end. The second end of the repositioning wire may include a lasso.
摘要:
Devices, systems and methods are described and involve deploying and reconstraining a stent. An intravascular device with first and second elongated tubular members capable of axial motion relative to a housing having an annular lock configured to secure an expandable intraluminal device in first state and release the intraluminal device in second state, the intraluminal device being coaxially disposed over the second elongated tubular member proximal of a distal stop. Actuators on the housing may withdraw or advance the first and second tubular members. The first tubular member is withdrawn to deploy the stent and is advanced to reconstrain the stent. The second tubular member is withdrawn to engage the distal stop with the annular lock prior to reconstraining. The device may have a directional control that is engaged by an actuator to allow only proximal motion of the first elongated tubular member relative to the housing and allows only distal motion of the first elongated tubular member when disengaged.
摘要:
The present invention relates to a repetitively unfolding-folding stent device with a mesh structure for the rhinopharynx, the vessels, the ducts and other hollow viscera, which has a mechanism for a repetitive unfolding and folding of a drawer slide release type, which consists of two or more longitudinal trails and is engaged: by its outer surface to the mesh structure of the stent device and by its inner surface to the activation stylet (3) of the stent device.
摘要:
The present disclosure relates generally to medical implant devices for use within a patient's body and, more particularly, relates to systems and methods for resheathing vascular devices. In some embodiments, a stent delivery system includes a stent expandable from a compressed configuration to an expanded configuration. The stent has a proximal end and a distal end and an anchoring element having a proximal portion and a distal portion, wherein the anchoring element engages the stent in the expanded configuration.
摘要:
A collapsible prosthetic heart valve (200) includes a stent (202) and a valve assembly (204). The stent (202) has an annulus section (240) with a relatively small cross-section, and an aortic section (242) with a relatively large cross-section. The valve assembly (204), including a cuff (206) and a plurality of leaflets (208), is secured to the stent (202) in the annulus section (240) such that the valve assembly (204) can be entirely deployed in the native valve annulus and function as intended while at least a portion of the aortic section (242) is held by the delivery device (1010) in a manner that allows for resheathing. The configuration of the prosthetic valve (200) is such that the valve leaflets (208) can fully coapt and the valve (200) can function properly even when the stent (202) and/or valve assembly (204) become distorted upon deployment or use.
摘要:
Sealable and repositionable implant devices are provided with features that increase the ability of implants such as endovascular grafts and valves to be precisely deployed or re-deployed, with better in situ accommodation to the local anatomy of the targeted recipient anatomic site, and/or with the ability for post-deployment adjustment to accommodate anatomic changes that might compromise the efficacy of the implant. A surgical implant includes an implant body and a selectively adjustable assembly attached to the implant body, the assembly having adjustable elements and being operable to cause a configuration change in a portion of the implant body and, thereby, permit implantation of the implant body within an anatomic orifice to effect a seal therein under normal physiological conditions.
摘要:
A control system (100) for controlling movement of a medical device delivery system (10), a stent delivery system (10) and a method for controlling movement of a medical device delivery system are provided. The control system includes a first extendable arm (102) comprising a plurality of first struts (110) interconnected at intermediate points (121) and end points (123) of the first struts. The first arm is movable between a first position and a second position and the first arm is operably connected to one of a first shaft (22) and the second shaft (24). The control system also includes a first actuator (114) operably connected to the first arm and the first actuator is operable to move the first arm from the first position to the second position. Movement of the first arm moves the first shaft relative to the second shaft to change the position of the second shaft relative to the first shaft.
摘要:
A stent comprised of a scaffolding structure having components configured to allow at least a portion of the stent to decrease in diameter in response to an axial force applied to the stent. Further, the components and elements of the stent may be configured to balance transverse forces applied to the stent, thus reducing the incidence of infolding.
摘要:
A collapsible prosthetic heart valve (100) includes a stent (102) and a valve assembly (104). The stent has a proximal end and a distal end and includes a plurality of struts (114). The struts have free ends (615, 625) configured to inhibit tissue penetration. The valve assembly, including a plurality of leaflets (108), is disposed within the stent.
摘要:
Sealable and repositionable implant devices are provided with one or more improvements that increase the ability of implants such as endovascular grafts to be precisely deployed or re¬ deployed, with better in situ accommodation to the local anatomy of the targeted recipient anatomic site, and/or with the ability for post-deployment adjustment to accommodate anatomic changes that might compromise the efficacy of the implant. A surgical implant includes an implant body and a selectively adjustable assembly attached to the implant body, having adjustable elements, and operable to cause a configuration change in a portion of the implant body and, thereby, permit implantation of the implant body within an anatomic orifice to effect a seal therein under normal physiological conditions.