Abstract: A microdevice includes a body having longitudinally spaced proximal and distal device ends and a guidewire extending proximally from the proximal device end. An anchoring apparatus includes an anchor having longitudinally spaced proximal and distal anchor ends. The anchoring apparatus is selectively expandable between a collapsed insertion condition and an expanded anchoring condition within the body tissue. A retrieval apparatus for selectively retrieving the medical microdevice and its associated anchoring apparatus from a target implantation site of a body tissue is described. The retrieval apparatus includes a stylet having proximal and distal stylet ends longitudinally separated by a stylet lumen configured to selectively accept the guidewire. A retrieval sheath has proximal and distal sheath ends longitudinally separated by a sheath lumen. The sheath lumen is configured to selectively and concurrently laterally surround the microdevice and the stylet therewithin for removal from the body tissue.

Abstract: An anchoring apparatus for a medical microdevice and a method of selectively maintaining the medical microdevice in a predetermined position within a body tissue are provided. The medical microdevice includes a body having longitudinally spaced proximal and distal device ends and a guidewire extending proximally from the proximal device end. The anchoring apparatus includes a selectively expandable anchor having longitudinally spaced proximal and distal anchor ends. A selected one of the proximal and distal anchor ends is connected to the distal or proximal device end, respectively. The anchor self-expands from a collapsed insertion condition to an expanded anchoring condition after insertion into a body tissue to resist post-implantation motion of the microdevice.