| US 7,567,838 B2 | ||
| Method for sensing cardiac contractile function using a lead insertable motion sensor | ||
| Nancy Yu, Maplewood, Minn. (US); Jiang Ding, Maplewood, Minn. (US); and Qingsheng Zhu, Little Canada, Minn. (US) | ||
| Assigned to Cardiac Pacemakers, Inc., St. Paul, Minn. (US) | ||
| Filed on Oct. 20, 2005, as Appl. No. 11/254,344. | ||
| Application 11/254344 is a division of application No. 10/004686, filed on Dec. 05, 2001, granted, now 6,980,866. | ||
| Application 10/004686 is a division of application No. 10/008397, filed on Dec. 06, 2001, granted, now 6,993,389. | ||
| Prior Publication US 2006/0041298 A1, Feb. 23, 2006 | ||
| Int. Cl. A61N 1/37 (2006.01) | ||
| U.S. Cl. 607—9 [607/6; 607/14; 607/17; 600/515; 600/526] | 21 Claims |
| 1. A method of detecting and measuring cardiac contractile functions using a signal representative of cardiac wall movement
provided by an acceleration sensor, said method comprising the steps of:
introducing said acceleration sensor unit into a vein of a cardiac wall, wherein the step of introducing said acceleration
sensor unit into said vein of said cardiac wall comprises the steps of introducing an implantable lead into said vein of said
cardiac wall and then inserting said acceleration sensor unit along an inner lumen of said implantable lead;
positioning said acceleration sensor unit in said vein of said cardiac wall in a manner such that said acceleration sensor
unit responds to movement of said cardiac wall and provides said signal representative of cardiac wall movement; and
connecting said acceleration sensor unit to an electronic device.
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