Patent ID: 7654985

Claim:
A medical device comprising: a device housing sized for introduction into and residence completely within the body lumen; a fixation mechanism to attach the device housing to a surface within the body lumen, wherein the fixation mechanism includes a cavity formed in the device housing and a shaft to capture luminal tissue within the cavity and a spring to bias the shaft toward the tissue; a controlled detachment mechanism mechanically actuating the fixation mechanism to selectively detach the device housing from the surface of the body lumen without endoscopic intervention, wherein the detachment mechanism includes a solenoid coil wound about the shaft and a circuit to energize the solenoid coil to drive the shaft against the spring bias and thereby release the luminal tissue; and a controller responsive to a control signal, wherein the controller activates the controlled detachment mechanism, and wherein the medical device remains completely within the body lumen until after the device is detached from the surface.