公开(公告)号：US20170095662A1

公开(公告)日：2017-04-06

申请号：US14872770

申请日：2015-10-01

Applicant: Medtronic, Inc.

Inventor： Paula McDonnell ,  Brendan P. Geraghty ,  Gwenda Francis ,  Rónán Wood ,  Sean Ward ,  Pat McHugh ,  Tomas K. Kelly

IPC: A61N1/362 ,  A61N1/372 ,  A61N1/375 ,  A61N1/05

Abstract: In a system for retrieving an implanted device, a flared inner surface of a catheter tubular sidewall may define a distal-most opening of a device receptacle; the opening has a first diameter equal to that of the receptacle, and a second diameter, coincident with a distal-most edge of the tubular sidewall, and at least 5% greater than the receptacle diameter. Alternately, a retrieval tool in sliding engagement within a lumen of a catheter includes a shaft assembly, through which a snare member passes, and which includes a collapsible spring-biased perimeter sidewall; the sidewall defines a capture member passageway approximately coaxial, and in fluid communication with a lumen of the shaft assembly. A distal-most opening of the passageway has a spring-biased diameter that is greater than that of a distal-most opening of a device receptacle of the catheter, and a collapsed diameter that is less than the receptacle distal-most opening diameter.