摘要:
An introducer for use in the implantation and retrieval of a device in a patient includes a catheter (43) within which a stylet (14) is slidably carried, the stylet (14) being biased to a retracted position by a spring (35) and deployable by depression of an actuator (50). A locking device (40) locks the stylet (14) relative to the catheter (43) such that the locking device (40) must be disengaged prior to operation of the actuator (50). In the preferred embodiment, both the locking device (40) and the actuator (50) must be actuated by movement thereof in a direction substantially perpendicular to the direction of motion of the stylet (14). In an alternative embodiment, it is the catheter (43) which moves relative to the stylet (14).
摘要:
The present invention provides a removable vena cava filter for capturing thrombi in a blood vessel. The filter (10) comprises a plurality of primary struts (12) having first ends attached together along a longitudinal axis. Each primary strut has an arcuate segment extending from the first end to an anchoring hook (26). The primary struts are configured to move between an expanded state for engaging the anchoring hooks with the blood vessel and a collapsed state for filter retrieval or delivery. Each primary strut is configured to cross another primary strut along the longitudinal axis in the collapsed state such that the arcuate segments occupy a first diameter (D1) greater than a second diameter (D2) occupied by the anchoring hooks in the collapsed state for filter retrieval or delivery.
摘要:
The present invention provides a removable vena cava filter (10) for capturing thrombi in a blood vessel. The filter comprises a plurality of primary struts (12) having first ends attached together along a longitudinal axis. Each primary strut includes an arcuate segment having a first tensile strength. The arcuate segment extends from the first end to an anchoring hook (26). The anchoring hook is integral with the arcuate segment and having the first thickness and first tensile strength. The filter further comprises a plurality of secondary struts (30) freely spaced between the primary struts and having connected ends attached together along the longitudinal axis. Each secondary strut freely extends from the connected end to a free end avoiding contact with other secondary struts and primary struts. Each secondary strut has a second tensile strength.
摘要:
A removable filter (10) having a collapsed state and an expanded state for capturing thrombi in a blood vessel is disclosed. The filter comprises a plurality of primary struts (12) and a plurality of secondary struts. Each primary strut in the expanded state extends from a primary strut first end to an anchoring hook (26). Each primary strut extends arcuately along a longitudinal axis and linearly radially. The plurality of primary strut first ends are attached together along the longitudinal axis (x). Each secondary strut in the expanded state extends from a secondary strut first end to a free end. Each secondary strut extends arcuately along the longitudinal axis and linearly radially. The plurality of secondary struts are attached together along the longitudinal axis. The plurality of secondary struts centralize the filter in the expanded state in the blood vessel.
摘要:
The present invention involves a removable filter (10) for capturing thrombi in a blood vessel. The filter comprises a plurality of struts (12) having first ends attached together along a longitudinal axis (X) of the filter. Each strut has a body member (15) extending from the first end along the longitudinal axis to an anchoring hook (26) defining a strut axis (S). Each strut is configured to move along a strut path (P) relative to the longitudinal axis between an expanded state for engaging with the blood vessel and a collapsed state for filter delivery or retrieval. Each anchoring hook has an angle of up to about 90 degrees relative to the strut axis.
摘要:
The present invention involves a removable filter (10) for capturing thrombi in a blood vessel. The filter comprises a plurality of struts (12) having first ends attached together along a longitudinal axis (X) of the filter. Each strut has a body member (15) extending from the first end along the longitudinal axis to an anchoring hook (26) defining a strut axis (S). Each strut is configured to move along a strut path (P) relative to the longitudinal axis between an expanded state for engaging with the blood vessel and a collapsed state for filter delivery or retrieval. Each anchoring hook has an angle of up to about 90 degrees relative to the strut axis.
摘要:
The present invention involves a removable filter for capturing thrombi in a blood vessel. The filter comprises a plurality of primary struts and a plurality of secondary struts. The plurality of primary struts has first ends attached together along a longitudinal axis. Each primary strut has an arcuate segment extending from the first end to an anchoring hook. The primary struts are configured to move between an expanded state for engaging the anchoring hooks with the blood vessel and a collapsed state for filter retrieval or delivery. Each primary strut is configured to cross another primary strut along the longitudinal axis in the collapsed state such that each anchoring hook faces the longitudinal axis away from the blood vessel for filter retrieval or delivery. The plurality of secondary struts has connected ends attached together along the longitudinal axis. The secondary struts extend therefrom to free ends to centralize the filter in the expanded in the blood vessel.
摘要:
An occlusion device (30) includes at least one self-expanding frame (42, 44) and graft material (46). Occlusion occurs by constricting the graft material (46) at a substantially central point or at an end of the device. The constriction is sized such that a guide wire (34) is able to pass therethrough. A valve mechanism (50) includes a screen (52) made from a resilient material and which includes a closable opening (54). The valve mechanism (50) allows a guide wire to pass through the occlusion device (30) whilst an effective physical barrier is maintained after removal of the guide wire (34).
摘要:
The present invention provides a removable vena cava filter for capturing thrombi in a blood vessel. The filter (10) comprises a plurality of primary struts (12) having first ends attached together along a longitudinal axis. Each primary strut has an arcuate segment extending from the first end to an anchoring hook (26). The primary struts are configured to move between an expanded state for engaging the anchoring hooks with the blood vessel and a collapsed state for filter retrieval or delivery. Each primary strut is configured to cross another primary strut along the longitudinal axis in the collapsed state such that the arcuate segments occupy a first diameter (D1) greater than a second diameter (D2) occupied by the anchoring hooks in the collapsed state for filter retrieval or delivery.