Implantable pump system with calibration
First Claim
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1. A system for facilitating obesity control comprising:
- a gastric banding device including an inflatable portion;
a fluid reservoir couplable to the inflatable portion;
an implantable fluid handling device couplable to the fluid reservoir and the inflatable portion, and includinga pump;
a first valve;
a second valve;
a flow measurement device; and
a controller/microprocessor system in communication with the implantable fluid handling device and configured to operate an algorithm programmed to automatically calibrate the pump with steps including;
pumping fluid from the pump through the first valve and to the inflatable portion of the gastric banding device for a predetermined number of pump cycles;
opening the second valve to allow fluid to drain from the inflatable portion of the gastric banding device;
measuring with the flow measurement device a flow rate of the fluid allowed to drain from the inflatable portion of the gastric banding device;
calculating based on the measured flow rate a volume of the fluid allowed to drain from the inflatable portion of the gastric banding device; and
calculating an actual pump rate of the pump based on the calculated volume of the fluid allowed to drain from the inflatable portion of the gastric banding device and based on the predetermined number of pump cycles, the actual pump rate for use to calculate a number of pump cycles for the pump to adjust a volume of fluid in the inflatable portion of the gastric banding device.
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Abstract
A system for facilitating obesity control includes an inflatable gastric banding device, a fluid reservoir couplable to the inflatable portion, and an implantable fluid handling device coupled to the fluid reservoir and the inflatable portion. The fluid handling device includes remotely operable components housed in a biocompatible housing. The fluid handling device includes a micropump effective to pump fluid to the band and a flow sensor. The system also includes a controller/microprocessor including an algorithm programmed to automatically calibrate the pump using data from the flow sensor, prior to adjustments made to the inflation of the gastric band.
40 Citations
18 Claims
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1. A system for facilitating obesity control comprising:
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a gastric banding device including an inflatable portion; a fluid reservoir couplable to the inflatable portion; an implantable fluid handling device couplable to the fluid reservoir and the inflatable portion, and including a pump; a first valve; a second valve; a flow measurement device; and a controller/microprocessor system in communication with the implantable fluid handling device and configured to operate an algorithm programmed to automatically calibrate the pump with steps including; pumping fluid from the pump through the first valve and to the inflatable portion of the gastric banding device for a predetermined number of pump cycles; opening the second valve to allow fluid to drain from the inflatable portion of the gastric banding device; measuring with the flow measurement device a flow rate of the fluid allowed to drain from the inflatable portion of the gastric banding device; calculating based on the measured flow rate a volume of the fluid allowed to drain from the inflatable portion of the gastric banding device; and calculating an actual pump rate of the pump based on the calculated volume of the fluid allowed to drain from the inflatable portion of the gastric banding device and based on the predetermined number of pump cycles, the actual pump rate for use to calculate a number of pump cycles for the pump to adjust a volume of fluid in the inflatable portion of the gastric banding device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of adjusting a stoma size of a gastric banding patient having an implanted gastric band, the method comprising the steps of:
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remotely commanding an adjustment of a volume of fluid in an inflatable portion of an implanted gastric band; calibrating a pump in fluid communication with the inflatable portion of the implanted gastric band including initiating a sequence of operation of a pump, a first valve, a second valve, and a flow measurement device, including; pumping fluid from the pump through the first valve and to the inflatable portion of the implanted gastric band for a predetermined number of pump cycles; opening a second valve to allow fluid to drain from the inflatable portion of the implanted gastric band; measuring with the flow measurement device a flow rate of the fluid allowed to drain from the inflatable portion of the implanted gastric band; calculating based on the measured flow rate a volume of the fluid allowed to drain from the inflatable portion of the implanted gastric band; and calculating an actual pump rate of the pump based on the calculated volume of the fluid allowed to drain from the inflatable portion of the implanted gastric band and based on the predetermined number of pump cycles, the actual pump rate for use to calculate a number of pump cycles for the pump to adjust a volume of fluid in the inflatable portion of the implanted gastric band; and activating the calibrated pump to cause the adjustment remotely commanded for the volume of fluid in the inflatable portion of the implanted gastric band. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification