Magnetically coupled implantable pump system and method

摘要

A magnetically coupled, implantable pump system comprises an external controller and an implantable device. A non-implantable magnet in an external controller produces a magnetic field that couples the non-implantable magnet to a magnet in the implantable device. A non-implantable motor moves the non-implantable magnet in a rotational direction. When the non-implantable magnet moves in the rotational direction, a piston coupled to the magnet moves within the implantable device. As the piston moves, an amount of fluid from a reservoir in the implantable device moves out of the reservoir and into an inflatable portion of a gastric band. The implantable device may also move fluid out of the inflatable portion of the gastric band.

主权项

1. A system for adjusting a gastric band for treatment of obesity having an inflatable portion, the system comprising:
a non-implantable magnet configured to produce a magnetic field; a non-implantable motor, coupled to the non-implantable magnet, wherein said non-implantable motor is configured to move the non-implantable magnet in a rotational direction; and an implantable device comprising:
a reservoir containing a fluid and coupled to the inflatable portion of the gastric band;a magnet magnetically coupled to the non-implantable magnet, wherein the magnet is configured to rotate in response to the non-implantable magnet rotating; anda piston coupled to the magnet, wherein the piston is configured to move in response to the magnet rotating,wherein said piston is configured to apply pressure on the fluid in said reservoir and cause a portion of the fluid in the reservoir to move into the inflatable portion of the gastric band, thereby providing the system for adjusting the gastric band for the treatment of obesity.