| US 7,571,008 B2 | ||
| System and apparatus for remote activation of implantable medical devices | ||
| David A. Dinsmoor, St. Paul, Minn. (US); and James K. Carney, Eden Prairie, Minn. (US) | ||
| Assigned to Medtronic, Inc., Minneapolis, Minn. (US) | ||
| Filed on Aug. 17, 2004, as Appl. No. 10/920,818. | ||
| Claims priority of provisional application 60/495901, filed on Aug. 18, 2003. | ||
| Prior Publication US 2005/0043594 A1, Feb. 24, 2005 | ||
| Int. Cl. A61N 1/00 (2006.01) | ||
| U.S. Cl. 607—62 | 22 Claims |
| 1. An integrated activation system for an implantable medical device (IMD), said activation system and said IMD sharing a
power source, said activation system comprising:
a transistor switching circuit configured to gate power from the power source to the IMD; and
a sensing element coupled to said switching circuit, said sensing element configured to:
detect a change in a surrounding environment;
become activated in response to an initial detected change;
draw current from the power source of less than or equal to about 1 nA during inactivation; and
enable an operation interval of said switching circuit in response to said initial detected change, said operation interval
serving a basis for said switching circuit to determine whether to gate power to the IMD;
said switching circuit further configured to
monitor sensing element signals during said operation interval; and
gate power to the IMD upon receipt of a pre-determined number of sensing element signals within said operation interval.
|