Patent ID: 8043206
Filing Date: 2011-10-25
Classification: A61B,A61F

Abstract:
1. A gastric band adjustment assembly for placement in a patient with an implantable gastric band, the band adjustment assembly comprising: a sensor for taking pressure readings of fluid in a lumen of an expandable portion of the gastric band; a pump assembly connected to the lumen; a controller for operating the pump assembly to adjust a volume of fluid in the lumen based on the pressure readings and a target pressure for the gastric band; and a pressure adjusting module for processing the pressure readings and setting the target pressure based on the processing of the pressure readings; wherein the processing of the pressure readings comprises determining pressure variations each comprising a difference between a maximum and a minimum pressure at first and second values for the volume of fluid, and wherein the target pressure corresponds to one of the first and second values for which the pressure variations are determined to be lower or for which the pressure variations are within an acceptable range based on data analysis of the pressure readings by the pressure adjusting module over multiple sets of the pressure readings, and wherein the setting of the target pressure comprises determining the pressure variations at the first value for the fluid volume are less than a maximum pressure variation value accessible to the pressure adjusting module, determining the pressure variations at the second value for the fluid volume are at least about the maximum pressure variation value, and setting the target pressure to correspond to the first value for the fluid volume.