公开(公告)号：US20170100582A1

公开(公告)日：2017-04-13

申请号：US14880371

申请日：2015-10-12

Applicant: Medtronic, Inc.

Inventor： Francis D. McEvoy ,  Brendan P. Geraghty ,  Paula McDonnell ,  Pat McHugh ,  Colin W. Meade ,  Sean Ward ,  Rónán Wood ,  Kealan E. O'Carroll ,  Tomas K. Kelly ,  Gwenda Francis

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

CPC classification number: A61N1/0573 ,  A61B17/22031 ,  A61B2017/00358 ,  A61B2017/22035 ,  A61M25/0074 ,  A61M2025/0004 ,  A61N1/362 ,  A61N1/37205 ,  A61N1/3756 ,  A61N2001/0578

Abstract: An engagement subassembly of a catheter, for retrieving an implanted medical device, may include at least three segments or, alternately, capture members being spring biased outward from a longitudinal axis of the subassembly, wherein a device receptacle of the catheter forces the capture members/segments, against the spring bias thereof, toward the axis. Each capture member includes a spring-biased wire and a grip, which is located between proximal and distal portions of the corresponding wire, and which is configured to interlock within a gap between a device attachment feature and housing; a length of each wire distal portion may be approximately equal to that of the device housing. An interlocking edge of each segment interlocks within the gap between the attachment feature and housing, when a distal-facing surface of each segment, which tapers outward from the axis in a distal direction, comes into confronting engagement with the device housing.

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.