Delivery device with shortened inner tube and associated method

摘要

A delivery device for positioning and deploying an implantable device within a lumen is provided. The device includes a longitudinal outer tube having proximal and distal ends, wherein the implantable device is positioned proximate to the distal end of the outer tube. The device also includes a longitudinal inner tube slidably disposed within the outer tube and having proximal and distal ends, wherein at least a portion of the distal end of the inner tube is configured to underlie at least a portion of a proximal end of the implantable device. The distal end of the inner tube is located proximally of the distal end of the outer tube to define a gap for accommodating at least a portion of the implantable device. A mechanism is coupled to the inner and/or outer tubes and is operable to deploy the implantable device within the lumen.

主权项

1. A delivery device for positioning and deploying an implantable device within a lumen comprising:
a longitudinal outer tube having a proximal end and a distal end, wherein the outer tube is configured to receive the implantable device at a position within the outer tube and proximate to the distal end of the outer tube; a longitudinal inner tube slidably disposed within the outer tube and having a proximal end and a distal end, wherein at least a portion of the distal end of the inner tube is configured to underlie a proximal end of the implantable device about an inner circumference of the implantable device, and wherein the distal end of the inner tube is located proximally of the distal end of the outer tube to define a gap for accommodating at least a portion of the implantable device; a deployment mechanism coupled to at least one of the inner and outer tubes and operable to deploy the implantable device within the lumen, wherein the deployment mechanism comprises:
a first actuator to at least partially move the outer tube proximally and longitudinally relative to the inner tube,a connector connected to the first actuator, anda second actuator positioned proximal to the first actuator and operatively connected to the first actuator via the connector to move the outer tube proximally and longitudinally relative to the inner tube,wherein the first actuator and the second actuator are configured to be retracted in succession to provide staged deployment of the implantable device such that retracting the second actuator moves the first actuator and the outer tube proximally and longitudinally relative to the inner tube from a first position to a second position to cause partial deployment of the implantable device and subsequent retraction of the first actuator slidably and proximally within the connector toward the second actuator moves the outer tube proximally and longitudinally relative to the inner tube from the second position to a third position to cause full deployment of the implantable device; and an optical device configured to be positioned within the gap to view at least a portion of an interior of the implantable device within the outer tube prior to deployment of the implantable device.