US20110034760A1 - Feedback systems and methods to enhance obstructive and other obesity treatments - Google Patents

Feedback systems and methods to enhance obstructive and other obesity treatments Download PDF

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US20110034760A1
US20110034760A1 US12/754,439 US75443910A US2011034760A1 US 20110034760 A1 US20110034760 A1 US 20110034760A1 US 75443910 A US75443910 A US 75443910A US 2011034760 A1 US2011034760 A1 US 2011034760A1
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ingestion
implant
signals
patient
sensor
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Charles R. Brynelsen
Mir Imran
Rose Province
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IntraPace Inc
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IntraPace Inc
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Assigned to INTRAPACE, INC. reassignment INTRAPACE, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRYNELSEN, CHARLES R., PROVINCE, ROSE, IMRAN, MIR
Publication of US20110034760A1 publication Critical patent/US20110034760A1/en
Assigned to GENERAL ELECTRIC CAPITAL CORPORATION reassignment GENERAL ELECTRIC CAPITAL CORPORATION SECURITY AGREEMENT Assignors: INTRAPACE, INC.
Assigned to HEALTHCARE FINANCIAL SOLUTIONS, LLC, AS SUCCESSOR AGENT reassignment HEALTHCARE FINANCIAL SOLUTIONS, LLC, AS SUCCESSOR AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GENERAL ELECTRIC CAPITAL CORPORATION, AS RETIRING AGENT
Assigned to INTRAPACE, INC. reassignment INTRAPACE, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: HEALTHCARE FINANCIAL SOLUTIONS, LLC, AS AGENT, AND ASSIGNEE OF GENERAL ELECTRIC CAPITAL CORPORATION
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    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H40/00—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices
    • G16H40/60—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices
    • G16H40/67—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for remote operation
    • A—HUMAN NECESSITIES
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    • A61B5/0015—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by features of the telemetry system
    • A61B5/0022—Monitoring a patient using a global network, e.g. telephone networks, internet
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    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
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    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/0205—Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
    • A61B5/02055—Simultaneously evaluating both cardiovascular condition and temperature
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
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    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/1118—Determining activity level
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    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
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    • A61B5/411—Detecting or monitoring allergy or intolerance reactions to an allergenic agent or substance
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    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
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    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices; Anti-rape devices
    • A61F5/0003—Apparatus for the treatment of obesity; Anti-eating devices
    • A61F5/0013—Implantable devices or invasive measures
    • A61F5/005—Gastric bands
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B19/00—Teaching not covered by other main groups of this subclass
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    • G—PHYSICS
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    • G16H10/60—ICT specially adapted for the handling or processing of patient-related medical or healthcare data for patient-specific data, e.g. for electronic patient records
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H20/00—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance
    • G16H20/30—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance relating to physical therapies or activities, e.g. physiotherapy, acupressure or exercising
    • G—PHYSICS
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    • G16H20/00—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance
    • G16H20/60—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance relating to nutrition control, e.g. diets
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    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61B5/07—Endoradiosondes
    • A61B5/076—Permanent implantations
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    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A61B5/6867—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive specially adapted to be attached or implanted in a specific body part
    • A61B5/6871—Stomach
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/36007—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation of urogenital or gastrointestinal organs, e.g. for incontinence control
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/372—Arrangements in connection with the implantation of stimulators
    • A61N1/37211—Means for communicating with stimulators
    • A61N1/37235—Aspects of the external programmer
    • A61N1/37247—User interfaces, e.g. input or presentation means

Definitions

  • Obesity and its associated health problems have a significant economic impact on the U.S. health care system.
  • Medical costs associated with excess weight and obesity may involve direct and indirect costs.
  • Direct medical costs may include preventive, diagnostic, and treatment services related to obesity.
  • Indirect costs relate to morbidity and mortality costs.
  • Morbidity costs are defined as the value of income lost from decreased productivity, restricted activity, absenteeism, and bed days.
  • Mortality costs are the value of future income lost by premature death.
  • Such a system would provide a patient, his or her physician, a lifestyle coach, support group, and/or other caregivers the information collected about the patient's eating and exercise habits for use in monitoring the patient's progress and so as to present actual behavior-based information to the patient for effective behavior modification and greater success in achieving weight loss or health goals.
  • the present invention relates to feedback systems and methods to enhance obstructive and other obesity treatments.
  • embodiments of the invention make specific reference to treatment of obesity, the system and methods described herein may be applicable to other treatments seeking patient behavior modification, and particularly disorders in which presenting feedback regarding patients' actual eating and/or exercise habits is desired.
  • the invention provides a method for treating a patient having a gastrointestinal tract and an unhealthy ingestion pattern.
  • the method comprises deploying an ingestion restricting implant body along the gastrointestinal tract. Signals are generated correlating to altering of the implant body. Unhealthy ingestion by the patient are inhibited in response to the signals sufficiently to modify the unhealthy ingestion pattern toward a healthier ingestion pattern.
  • the signals may comprise sensor signals and/or actuation signals.
  • ingestion alters the implant body, which, in turn, generates signals in the form of sensor signals.
  • the generated sensor signals can be used to inhibit unhealthy ingestion by the patient by activating a stimulation electrode of the implant, enhancing the restriction, presenting documented ingestion events to the patient or a lifestyle coach, or the like.
  • the implant body can be altered by actuator signals so as to change the restriction imposed on the gastrointestinal tract, optionally in response to ingestion events, an eating schedule, or the like.
  • the actuator signals may induce changes in the implant a plurality of times a day for a plurality of days, allowing the implant to adjust dynamically so as to facilitate healthy ingestion while inhibiting unhealthy ingestion.
  • the implant body will be deployed using bariatric surgery so as to surgically implant an implant system for weight loss.
  • the implant system may include the implant body and a processor coupled to the implant body.
  • the coupling between the processor and the implant body allows the signals to be transmitted between these two structures, with the signals optionally being electrical signals, optical signals, wireless telemetry signals, mechanical signals, or the like.
  • the implant body of the implant system will often comprise a gastric band that having a channel that receives a patient's gastrointestinal tract therein, and a processor coupled to the gastric band.
  • the signals may include sensor signals transmitted from the gastric band to the processor in response to ingestion, and/or actuation signals transmitted from the processor to the gastric band so as to alter a size or compliance of the channel.
  • the gastric band comprises a fluid pressure bladder disposed between the channel and a support structure of the gastric band.
  • the gastric band is altered a number of times each day, with an associated alteration in an engagement force between the gastrointestinal tract and the fluid-filled pressure bladder of the gastric band.
  • the engagement force may be altered by ingestion-related distension of the gastrointestinal tract within the channel of the gastric band.
  • At least one sensor can generate signals in response to transient changes in fluid pressure within the bladder, often as a result of ingestion events. Unhealthy ingestion can optionally be inhibited by showing a display of sensed eating events to the patient or a lifestyle coach.
  • ingestion inhibiting therapies may be applied in response to the sensor signals, such as by increasing the pressure within the bladder, and/or by electrically stimulating tissue of the gastrointestinal tract with the implant.
  • the sensors include at least a pressure sensor, a temperature sensor, an optical sensor, an impedance sensor, a pH sensor, or an acoustic sensor.
  • the ingestion event may be ingestion of a solid or ingestion of a drink.
  • the processor of the implant sends pressure commands or actuator signals to the bladder to alter the engagement force by changing the fluid pressure within the bladder.
  • the pressure within the bladder can be decreased each day to allow healthy ingestion and increased each day to inhibit unhealthy ingestion.
  • the processor may send signals via an actuator to alter the implant by varying the size, compliance, or shape of the channel of the gastric band.
  • the actuator typically comprises a fluid actuator.
  • the actuator is energized with signals so as to activate the gastric band by increasing restriction and decreasing ingestion into the patient.
  • the actuator can also be energized by signals in an opposite direction to deactivate the gastric band by decreasing restriction and allowing increased ingestion into the patient.
  • the implant body includes a gastric balloon, with a processor coupled to an actuator.
  • the processor sends signals to the actuator to vary the size of the gastric balloon such to alter restriction of the ingestion.
  • Altering of the implant body includes changing the fluid pressure within the gastric balloon.
  • deploying the implant system delivers electrical stimulation to an internal organ of the living body.
  • the implant senses a physiological trigger and the processor transmits the signals in response to the physiological trigger.
  • the processor transmits the signals at least in part in response to a non-physiological trigger.
  • a pressure sensor coupled to the implant body identifies pressure changes in the gastrointestinal tract. Signals are used to identify an ingestion event; an unhealthy ingestion is inhibited when an unhealthy ingestion event has been identified
  • the processing of the signals identifies peristaltic waves of the gastrointestinal tract proximate to the ingestion restricting implant body.
  • an ingestion event is characterized as ingestion of a liquid in response to a pressure change that lasts more than 10 seconds but less than 5 minutes.
  • An ingestion event is characterized as ingestion of a solid in response to a pressure change that lasts more than 5 minutes but less than 60 minutes.
  • a temperature sensor may sense a temperature within the gastrointestinal tract and send corresponding signals.
  • a processor uses the signals from the pressure sensor and temperature sensor to characterize the ingestion event, inhibiting of the unhealthy ingestion.
  • an ingestion event that causes sufficiently high pressure change and sufficiently low temperature change is identified as ingestion of a solid.
  • An ingestion event that causes sufficiently high pressure change and sufficiently high temperature change is identified as a combined solid and liquid ingestion.
  • An ingestion event that causes sufficiently low pressure change and sufficiently low temperature change is identified as no ingestion.
  • An ingestion event that causes sufficiently low pressure change and sufficiently high temperature change is identified as a liquid ingestion and possible cheating event.
  • embodiments of the present invention provide a method for treating a patient by deploying an ingestion restricting implant along the gastrointestinal tract.
  • the implant senses an ingestion into the patient and transmits signals in response to the ingestion. Based on the signals, ingestion information is displayed and/or the patient is treated.
  • deploying the implant includes positioning the implant around the gastrointestinal tract so that a tissue of the gastrointestinal tract extends through a channel of the implant.
  • the size of the channel limits transmission of ingested material along the gastrointestinal tract from upstream of the implant to downstream of the implant.
  • the implant is deployed through a laparoscopic gastric band placement procedure.
  • the implant may include a gastric balloon. Deploying the implant includes positioning the implant inside the stomach; the implant has a sufficient food displacement volume to significantly limit ingestion.
  • embodiments of the present invention provide a method for treating a patient by deploying at least a portion of an implant along the gastrointestinal tract, the implant having a body and a processor; identifying an allowed ingestion and allowing the ingested material to pass though the gastrointestinal tract; and, in response to identifying of an unhealthy ingestion, transmitting signals from the processor to the implant so as to alter a shape or size of the implant to restrict the unhealthy ingestion.
  • deploying the implant includes positioning the implant around a gastrointestinal tract that extends through a channel of the implant.
  • the size of the channel limits transmission of ingested material along the gastrointestinal tract from upstream of the implant to downstream of the implant.
  • Deploying of the implant includes a laparoscopic gastric band placement procedure.
  • the implant includes positioning the implant inside the stomach; the implant has a sufficient food displacement volume to significantly limit ingestion.
  • the implant includes a gastric balloon.
  • embodiments of the present invention provide a method for treating a patient by deploying an implant with a processor and a body; identifying an unhealthy ingestion; and transmitting signals from the processor to the patient in response to the identification of the unhealthy ingestion so as to inhibit the unhealthy ingestion.
  • inventions of the present invention provide a therapeutic implant system for treating a patient with an unhealthy ingestion pattern.
  • the therapeutic implant system includes an ingestion restricting implant body that can be deployed along the gastrointestinal tract, a signal generator coupled to the implant body to generate signals correlating to altering of the implant body, and a processor coupled to the signal generator such that the processor can be used to inhibit the patient's unhealthy ingestion pattern.
  • the signal generator may comprise a sensor that senses ingestion (via changes in fluid pressure, temperature, or the like) and/or an actuator that alters a size, shape, or compliance of the implant body.
  • the implant body includes a gastric band forming a channel that surrounds the gastrointestinal tract.
  • the gastric band includes a fluid-filled pressure bladder located between the channel and a support structure, such that changes in a fluid pressure within the fluid pressure bladder correspond with changes in an engagement force between the gastrointestinal tract and the gastric band.
  • the signal generator includes at least one sensor coupled to the fluid pressure bladder, the altering of the engagement force induced by ingestion-related distension of the gastrointestinal tract within the channel of the gastric band so that the signals are generated in response to transient changes in fluid pressure within the bladder and the signals indicate an ingestion event.
  • the implant system includes a display coupled to the processor, to show eating events identified in response to the signals and to communicate to the patient or a lifestyle coach, an actuator coupled to the processor to alter the fluid pressure within the bladder in response to the ingestion event; and an electrode coupled to the processor to stimulate tissue of the gastrointestinal tract in response to the ingestion event.
  • the implant system also includes at least one pressure sensor, a temperature sensor, an optical sensor, an impedance sensor, a pH sensor, or an acoustic sensor coupled to the processor.
  • the signal generator transmits fluid pressure signals transmitted to the bladder from the processor.
  • the signal generator includes an actuator that induces changes in fluid pressure within the bladder in response to the pressure signals. Each day the pressure within the bladder is decreased to allow healthy ingestion and increased to inhibit unhealthy ingestion.
  • the implant system energizing the actuator activates the gastric band so as to increase restriction and decrease ingestion into the patient.
  • the implant system energizing the actuator deactivates the gastric band so as to decrease restriction and allow increased ingestion into the patient.
  • the implant body includes a gastric balloon. Altering the implant body includes altering a fluid pressure within the gastric balloon.
  • the signal generator includes an actuator which, in response to command signals from the processor, causes the size of the gastric balloon to vary, to alter the restriction of ingestion.
  • the implant system includes an electrode coupled to the processor so as to deliver electrical stimulation to an internal organ of the living body.
  • the implant system the signal generator comprises a pressure sensor.
  • the processor in the implant systems processes the signals to identify pressure changes in the gastrointestinal tract. A pressure change that lasts at least 10 seconds but not more than 5 minutes is identified as an ingestion of a liquid. A pressure change that lasts at least 5 minutes but not more than 60 minutes is identified as an ingestion of a solid.
  • a temperature sensor coupled to the processor so as to provide a temperature from inside the gastrointestinal tract.
  • the processor processes signals from the pressure sensor and temperature sensor to identify pressure changes and temperatures.
  • the processor identifies high pressure change and low temperature change as a solid ingestion.
  • the processor identifies high pressure change and high temperature change as a combined solid and liquid ingestion.
  • the processor identifies low pressure change and low temperature change as no ingestion.
  • the processor identifies low pressure change and high temperature change as a liquid ingestion and possible cheating event.
  • an optical sensor is coupled to the processor.
  • a pH sensor is coupled to the processor.
  • embodiments of the present invention provide a system for treating a patient, including an ingestion restricting implant body deployable along the gastrointestinal tract, a sensor coupled to the implant body so as to transmit signals in response to ingestion into the patient in use, and a processor, coupled to the sensor, that generates output in response to the signals.
  • This output includes ingestion display signals and/or patient treatment signals.
  • embodiments of the present invention provide a system for treating a patient that includes an implant body deployable along the gastrointestinal tract, a processor; and an actuator coupling the processor to the body.
  • the processor identifies, during a day, an allowed ingestion, and allows an associated ingested material to traverse the body of the implant along the gastrointestinal tract.
  • the processor identifies an unhealthy ingestion and transmits signals to the implant body via the actuator to alter a shape or size of the implant body to restrict the unhealthy ingestion.
  • embodiments of the present invention provide a therapeutic implant system for treating a patient that includes an ingestion restricting implant body implantable along the gastrointestinal tract and a processor coupleable to the implant body so as to transmit signals.
  • the signals are transmitted in correlation with changes in a size or a shape of the implant body in use.
  • the therapeutic implant has two possible configurations that differ in size and shape; compared to the first configuration, the second configuration exhibits an enhanced inhibition of ingestion.
  • embodiments of the present invention provide a therapeutic implant system for treating a patient that includes an ingestion restricting implant body implantable along the gastrointestinal tract, one or more sensors for generating signals that are transmitted in correlation with an ingestion event, and a processor coupled to the one or more sensors and the implant body so as to transmit the signals.
  • embodiments of the present invention provide a therapeutic implant system for treating a patient that includes an ingestion restricting implant body implantable along the gastrointestinal tract, one or more sensors for generating signals that are transmitted in correlation with physical activity event, and a processor coupled to the one or more sensors and the implant body so as to transmit the signals.
  • the senor includes an activity sensor.
  • the senor includes a heart rate sensor.
  • the senor includes a core body temperature sensor.
  • the senor includes a sleep detector.
  • the signals are transmitted by the processor to a data server.
  • FIG. 1 shows an exemplary system 100 suitable for implementation of embodiments of the present invention.
  • FIG. 1A shows an exemplary gastric band sensor system implant 900 for use in the system of FIG. 1 .
  • FIG. 1B-D illustrate the electrical stimulation component of the gastric band sensor system implant 900 .
  • FIGS. 2A-2C illustrate alternative embodiments of system 900 .
  • FIG. 2D shows an embodiment of system 900 comprising two pressure sensors 928 coupled to the fluid-filled cuff 903 .
  • FIG. 2E shows an alternative embodiment of system 900 comprising at least two lap bands, each lap band comprising at least one sensor 926 .
  • FIG. 3 illustrates ingestion of food or drink into a stomach.
  • FIG. 3A shows a cross-sectional view of the superior portion of the stomach constricted by a lap band 902 with a fluid filled cuff 903 .
  • FIGS. 4A-4C show the pressure waveforms from pressure sensor signals one might expect with food or drink input. More specifically, FIG. 4A shows the expected pressure waveforms from an ingestion of food 1000 . FIG. 4B illustrates an overeating event. FIG. 4C shows the expected pressure waveforms 1200 from a drinking event.
  • FIG. 5 shows the pressure waveforms 1300 that occur with injection of fluid, e.g. saline, into the port of the lap band.
  • fluid e.g. saline
  • FIG. 6 shows pressure waveforms from peristaltic waves 1400 .
  • FIG. 7 shows an exemplary intragastric balloon-sensor-monitor system 1500 .
  • FIG. 8 shows a method of treating a patient with an unhealthy ingestion pattern 2000 .
  • FIG. 8A-E show alternative treatments method comprising the therapeutic implant.
  • FIG. 9 schematically shows a system and method for classification of ingestion events based on signals from a plurality of sensors.
  • the present invention often takes advantage of processors to enhance obesity therapies that rely on restrictive implants disposed along the gastrointestinal tract.
  • Some embodiments of the present invention relate to feedback systems and methods for communicating implanted sensor-based information so as to affect behavior modification for eating disorders.
  • Some embodiments of the present employ systems which alter a restrictive implant in response to signals.
  • embodiments of the invention make specific reference to treatment for obesity, the system and methods described herein may be applicable to any treatment in which presenting feedback regarding patients' eating and/or exercise habits is desired.
  • Embodiments of the present invention collect information regarding the patient's eating and exercise habits via one or more sensors implanted within the body of the patient. This information can then be reviewed by a clinician during office visits and used in coaching the patient. Coaching may include helping the patient to make healthy lifestyle choices, such as specifically encouraging the patient to decrease his or her caloric intake while increasing his or her caloric expenditure. Compliance with physician advice may be low in obese patients and caloric intake is often under-reported while caloric expenditures are often over-reported.
  • the implantable sensors will often detect eating events, solid versus liquid intake, and optionally even meal compositions.
  • the various implantable sensors can be implanted at the same time as the surgical procedures so as to minimize the number of surgical or endoscopic interventions in the patients.
  • the systems and methods described herein may identify eating and other behaviors which the patient is not aware of (including night-time eating and the like).
  • These systems and methods may also improve the correlation between positive patient behavior and beneficial positive reinforcement, and decrease deleterious correlations between negative patient behavior (such as under-reporting of actual ingestion, over-reporting activity levels, and the like) with misguided positive reinforcement. Such improvements may be particularly effective at promoting and/or maintaining healthy activities when ultimate health goals remain distant.
  • the sensor and feedback system of the present invention is not subject to the reporting bias of the patient, thus presenting an objective view.
  • embodiments of the present invention allow data to be collected twenty-four hours per day, seven days per week, which provides an accurate record of the patient's behavior without dependence upon the patient's memory or commitment to the eating and exercise tracking process.
  • Some embodiments may sense and/or restrict caloric intake, such as using a band implanted around the stomach so as to constrict flow along the gastrointestinal tract, a gastric balloon inflated within the stomach, or the like.
  • the present invention also provides stimulation of the stomach to reduce caloric intake.
  • Embodiments of the invention provide a system that accesses the data collected by the implanted system remotely.
  • the system is then accessible by the patients and/or the patients' health coaches to support the patient in achieving their weight reduction goals.
  • the automated availability of behavior modification feedback, shortened time between “coaching sessions” and increased accuracy of the sensor data will improve outcomes for the patients.
  • the invention may employ aspects of social networking systems, with sensor-based information that has been generated using signals from an implanted sensor often being available to one or more members of a group.
  • the group may, at least in part, be defined by the patient giving permission to particular individuals.
  • Other members of the group (such as the patient and a supervising physician) may be defined when the group is first organized.
  • Many patients having implanted sensors may join a mutual support group of patients, with sensor-based data being shared between the implant recipients.
  • these systems may allow patients to receive feedback within a relatively short time after exhibiting behavior that is sensed by the sensor, preferably within two days of the sensor identifying an eating event or activity level, and ideally within one day of the behavior.
  • some embodiments may to allow daily uploads, and/or send messages to a smartphone or personal digital assistant (PDA) in near real time.
  • PDA personal digital assistant
  • embodiments of the invention may make use of aspects of Web-2.0 systems such as FaceBookTM social networking systems and methods, MySpaceTM social networking systems and methods, Linked InTM social networking systems and methods, or the like.
  • Embodiments may also employ aspects of known weight reduction support group systems and methods, particularly those that are enhanced through electronic telecommunications such as the WeightWatchers.comTM weight management portal, TheDailyPlate.comTM nutrition and weight management system, and the like.
  • the sensor data sharing aspects of many embodiments may employ systems somewhat analogous to (and/or may be modified from) web-enabled athletic training community systems such as those of TrainingPeaks.comTM, EnduranceNation.usTM.
  • Still further aspects of the invention may be facilitated by systems and methods that have been developed (and are continuing to be developed, and/or will be developed in the future) in support of Health 2.0 concepts.
  • embodiments of the inventions described herein may leverage or be modified from a variety of known technologies, including by employing Elgg tools and solutions for creation of online communities as available at http://elgg.org.
  • FIG. 1 An example system 100 suitable for implementation of embodiments of the present invention is illustrated in FIG. 1 .
  • the system 100 comprises an implanted device 110 that communicates with a home monitor 120 via a wireless transmitter 112 , such as an RF telemetry module.
  • the implanted device 110 includes at least one sensor 114 and, optionally, stimulation circuitry 116 for providing therapeutic stimulation to the patient.
  • a server 130 communicates with home monitor 120 via an internet or other telecommunication system so as to allow access to sensor-based data via a portal 150 and/or health coach workstation 160 , thereby providing sensor-based feedback to a patient 140 (through direct presentation of the sensor-based information to the patient, and/or through a health-coach/patient relationship).
  • Each of implanted device 110 , home monitor 120 , server 130 , health coach workstation 160 , and a portable patient device will typically include associated data processing systems, with the overall feedback system 100 combining their data manipulation and communication capabilities into an overall data architecture.
  • the data processing systems included in the discreet devices of the invention may include at least one processor.
  • the data processing systems included in the discreet devices of the invention may include at least one processor.
  • this will typically include circuitry implanted in the patient.
  • Other devices of system 100 will include circuitry external of the patient.
  • Such external processor circuitry may include one or more proprietary processor boards, and/or may make use of a general purpose desktop computer, notebook computer, handheld computer, smart phone, or the like.
  • the external processor may communicate with a number of peripheral devices (and/or other processors) and these peripheral devices may include a data and/or programming storage subsystem or memory.
  • the peripheral devices may also include one or more user interface input devices, user interface output devices, and a network interface subsystem to provide an interface with other processing systems and networks such as the Internet, an intranet, an and/or the like.
  • Implanted circuitry of the processor system may have some of the constituent components described above for the external circuitry as well being coupled to an implanted battery or other power source, with the implanted circuitry generally employing processors, data and software storage, and wireless communication capabilities (although hard-wired embodiments or other transcutaneous data transmission techniques could also be employed).
  • Both external and implanted memory of the devices of system 100 will often be used to store, in a tangible storage media, machine readable instructions or programming in the form of a computer executable code embodying one or more of the methods described herein.
  • the memory may also similarly store data for implementing one or more of these methods.
  • the memory may, for example, include a random access memory (RAM) for storage of instructions and data during program execution, and/or a read only memory (ROM) in which fixed instructions are stored.
  • RAM random access memory
  • ROM read only memory
  • Persistent (non-volatile) storage may be provided, and/or the memory may include a hard disk drive, a compact digital read only memory (CD-ROM) drive, an optical drive, DVD, CD-R, CD-RW, fixed or removable flash memory, memory sticks, solid-state removable memory, and/or other fixed or removable media cartridges or disks.
  • CD-ROM compact digital read only memory
  • CD-RW fixed or removable flash memory
  • memory sticks solid-state removable memory
  • solid-state removable memory solid-state removable memory
  • the functions and methods described herein may be implemented with a wide variety of hardware, software, firmware, and/or the like.
  • the various functions will be implemented by modules, with each module comprising data processing hardware and associated software configured to perform the desired function.
  • the modules may be largely integrated together so that a single processor board runs a single integrated code for each device, but will often be separated so that, for example, more than one processor board or chip or a series subroutines or codes are used.
  • a single functional module may be separated into separate subroutines or be run in part on separate processor chip that is integrated with another module.
  • a wide variety of centralized or distributed data processing architectures and/or program code architectures may be employed within different embodiments.
  • the electronic circuitry of the various devices of system 100 communicates via RF wired or wireless networking, and/or via telecommunications linkages for coordinating the presentation of sensor-based feedback from implanted device 110 to patient 140 , as well as to monitor and facilitate the various operations of the devices, including sensing, stimulating, signal transmission, charging and/or using energy from a battery device for powering the various devices, and the like.
  • the electronic circuitry of one or more of the devices includes an internal clock.
  • the internal clock may also include a real time clock component.
  • the internal clock and/or real time clock may be used to control stimulation, e.g., by stimulating or allowing stimulation at a particular time of the day.
  • the real time clock component may also provide a date/time stamp for detected events that are stored as information in a memory device, including sensor-based events, patient presentation events (such as accessing portal 150 , receiving a text message, communicating with a health coach or group member, or the like).
  • the memory may be preserved by saving information corresponding to an event of interest which is saved along with the time/date when the event occurred.
  • Sensor 114 is coupled to the stomach so as to generate signals responsive to ingestion, with the sensor ideally comprising at least one temperature sensor for sensing temperature information from within the stomach.
  • the sensors may be located on or extend from a housing of implanted device 110 and/or the sensors may be located on or extend from a lead or other device. Alternatively or additionally, a sensor may be located separately on the stomach wall and/or a sensor may be otherwise positioned elsewhere within, coupled to or in communication with the patient. In some embodiments, data obtained from the sensor may be pre-processed to remove noise or unwanted artifacts before it is analyzed. Additional sensors may be included, including an accelerometer and/or a heart rate sensor to measure patient activity or the like.
  • the housing of implanted device 110 will typically contain a battery and circuitry of the implanted device, and may be similar to other known implantable stimulator housing structures used for heart pacemaker systems and the like.
  • a suitable heart rate sensor may comprise an electrode or other sensor engaging the stomach wall so as to receive far field electric signals from the heart.
  • such a heart rate sensor may employ the same electrode as used to stimulate stomach tissue to inhibit ingestion, though separate electrodes may alternatively be used.
  • Heart signals, accelerometer signals, and/or other activity sensor signals may, like temperature or other ingestion sensor signals, be processed and recorded using circuitry 116 .
  • Suitable sensors and implantable devices, as well as aspects of the other devices of the devices of system 100 are described in (and/or may be modified from those described in) U.S.
  • the home monitor 120 includes a processor 122 , a storage medium 124 , and transmitting/receiving circuitry 126 and is capable of interrogating the implanted system 110 (and of receiving sensor-based data in response) when the patient is within a predetermined distance of the monitor. In some embodiments, this distance is approximately twenty to thirty feet.
  • the data interrogation could also be initiated by the patient via an input into home monitor 120 or a mobile device such as an iPhone® smart phone with ability Pocket Coach software.
  • the information communicated to the home monitor 120 is encrypted and sent via the internet to a HIPPA compliant server 130 .
  • the information is then accessible directly by the patient 140 or by approved medical personnel serving as the patient's health coaches (optionally via a workstation 160 ) via a secure web site or other portal 150 .
  • the home monitor will often comprise a desktop computer or other desktop unit powered by a wall plug, alternative systems may employ home monitors with smaller form factors (the home monitor optionally comprising and/or being similar in size to a notebook computer, a smart phone, a personal digital assistant, or the like) powered by batteries or other portable power sources.
  • the home monitoring system could also comprise a hand held computer and a port that is connected to the internet via a land-based telecommunications link such as via a modem and telephone connection.
  • the implanted device could be interrogated through radiofrequency (RF) communication with the handheld computer.
  • RF radiofrequency
  • Such a handheld computer could also be used to enter journal information. Placing the hand-held computer in the port would allow uploading of retrieved device data, and journal entries to the internet portal.
  • RF radiofrequency
  • Some or all of the functionality of the home monitor 120 may instead be implemented using a portable device 170 such as a smart phone, personal digital assistant, or the like. Even when a home monitor 120 is included in the system, such portable devices will allow the patient to benefit from communications to and/or from server 130 when the patient is out of the house.
  • the server 130 contains a number of algorithms designed to evaluate the implanted device data logs in comparison with goals established by the patient and his or her health coaches 160 . Based upon the results of the analysis, such as whether the goals have been met, coaching messages may be sent to the patient, for example via email, text message or telephone call. The messages are designed to provide encouragement for positive results and positive reminders for negative or neutral results. This coaching feature encourages patients to obtain energy balance in their lives. Specific examples regarding energy expenditure include sending encouraging messages for meeting daily or weekly activity goals or sending patient alerts if extended periods of sedentary activity have occurred. With regard to caloric intake, examples include communicating feedback to the patient as to whether eating patterns show adherence to the eating plan or whether caloric intake is meeting daily, weekly, or monthly goals.
  • Information in the data logs from the activity and consumption sensors of the implanted device 110 will also allow cross-checking between the patient's activity and meal diary and device-detected events. If the diaried and the detected events do not match (such as when the sensed data indicates that food was ingested but a snack or meal was not logged in the diary, or when a meal time or food intake quantity exceeds a logged meal), then reminders may be sent to the patient to enter additional information in the diaries, and/or to a health coach to check in with the patient.
  • Diary entries may be made by a patient via multiple devices (for example, using a home computer when at home, a notebook computer when at the office or traveling, and/or a Smart Phone while at a restaurant, or the like) and in a variety of different formats (including options for text diary entries, voice entries, photo entries taken via a digital camera or telephone, and the like).
  • diaries for the purpose of calorie counting have been typically inaccurate due to lack of patient compliance or attention, this feedback system facilitates improved accuracy.
  • alerts can be set that send performance summary reports to the patient's health coach and/or physician, which allows the health coach or physician to intervene when needed. The intervention could be in the form of extra coaching for the patient, revising of a weight loss/exercise plan, reprogramming of the implanted device stimulation parameters, or the like.
  • the patient may be provided with a hand-held or pocket device capable of receiving reminders and other notices from the server 130 , or the reminders may be sent to a general purpose hand-held or pocket device such as a cell phone or e-mailer, optionally using an appropriate local user interface or other software resident on that device.
  • a patient identification and/or password may optionally be entered to the portable device to obtain patient data so as to prevent others from accessing sensor-based data.
  • the notices transmitted to the portable device may include daily inspirational messages; diet and exercise education information; and particularly feedback messages (for example, identifying positive and negative events, reached daily goals, missed goals, skipped meals, excessive meal quantities or times, and/or added meals or snacks).
  • the feedback messages may be generated by algorithms contained on the server 130 ; and/or cross-checking between device data logs and patient reporting.
  • patients may be offered the option to join an online support group of patients with similar body mass indexes (BMI) who have similar attributes and weight loss goals. This group may meet online using the website 150 to provide support for one another, as well as review each other's results and provide support and encouragement to each other via email or text messaging via their patient-associated portable devices.
  • the patients may optionally share access to their sensor-based data with one or more other appropriate patients so as to allow the other patients to act as health coaches to the patient in which device 110 was implanted, and/or so as to allow the implant patient to coach those other patients based on their associated sensor-based data.
  • the patient will also optionally have the ability to invite health coaches into the online community, with the patient typically granting and managing a support group of the patient by granting permission to individuals to whom the patient is willing to allow access to the patient's sensor-based data.
  • the supporter or member of the group may be a spouse, a gym coach, a parent, a friend, or a family member.
  • the group may include another patient having an implant providing sensor-based data.
  • the group may comprise a mutual support group.
  • the patient and/or health coach may obtain updates by accessing a web site or other portal 150 .
  • the portal will optionally comprise a secure website into which the patient or other system user enters a patient identifier and/or password, allowing patients to log into the site with confidence that the system is safe and secure. Patients should feel sensitive medical data is sufficiently protected and that highly sensitive medical data is not displayed as appropriate given the value of the portal.
  • Portal 150 may optionally comprise a “support dashboard,” includes a comprehensive set of weight loss tools designed to support the individual. In addition, the support dashboard may allow access to the data logged by the implanted device 110 by the patient. The usefulness of the weight loss tools included in portal 150 may be enhanced through the ease by which the patient is provided accurate information on his or her daily activity and consumption.
  • the sensor-based information may optionally be enhanced by patient reporting of specific food quantities, food types, caloric intake, and/or the like.
  • the support dashboard may include features such as: a calorie database, an online calorie counter, a packaged food database, meal preparation support (such as custom meal menus generated for that patient), an activity diary, an exercise guide and planner, a weight tracking log, a body-mass index calculator, activity or exercise reports, meal frequency and duration reports, and/or a message center.
  • Portal 150 may present patient performance based on predetermined activity and caloric goals, optionally including daily kilocalories to be burned, daily calories consumed, and/or a net summary of the patient's energy balance.
  • Portal 150 may also present additional sensor-based data, including sleep or rest data (such as the number of hours slept, a quantified quality of sleep or other rest periods, and the like).
  • portal 150 may have a food calculator to look up calories of food types, to input quantities of their planned or consumed meals, and the like.
  • Food calories can be input and/or determined in a variety of different ways, with the site optionally employing a food calculator or linking to a commercial calorie identifying website such as CalorieKing.com or the like.
  • Meal logging may optionally include uploading data or photos to the portal directly or by linking to a meal logging web-base service such as that which was offered commercially by myfoodphone.com.
  • Portal 150 may also have commercially available look-up caloric and/or nutritional data from food suppliers, including commercial prepackaged customized foods suppliers, restaurant chains, or the like.
  • Portal 150 may facilitate networking with identified friends using known social networking capabilities, giving users the ability to email to friends and health care providers and accepting input from such individuals so as to allow them to make public or private comments and the like.
  • the members may connect into a live chat room sponsored by the health care practitioner support group (if desired). This may allow real time coaching based on individual own performance on eating, exercise and lifestyle opportunities.
  • the portal may also support a group or circle of friends to allow individuals to in chat real time or transmit messages to one another.
  • Portal 150 may optionally accept predetermined or customized user data, allowing the user to store desired health related information on their personal page, and to control the access of others to that information. This data could include blood pressure, glucose and other data indicative of the general health status or goals of the patient.
  • the portal will allow for daily notes from the individual, this will allow users to note overall feelings of wellness or questions they might have about eating and motivations.
  • portal 150 may allow for feedback from the network based on the individual's goals.
  • the site will allow for messaging to the individuals own page (as well as other portable or connected device, as described above) which the user chooses. This messaging may be configured to prompt the individual based on performance achieved or notes about missed activity events, meal events, etc.
  • the portal may also notify users when a member of their selected member friends has achieved their personal goals and/or accomplishments.
  • Portal 150 may also include goal-setting and behavior/goal comparison tools. Simple goal setting fields may optionally be available for the patient, though more sophisticated systems may allow the patient to enter a long-term goal and may interactively help the patient to determine short term and long term intermediary goals so as to reach their ultimate weight reduction target.
  • the system may, for example, provide an indication of the quantity of exercise that would be appropriate to achieve an interim or short term weight loss given the patient's sensed ingestion behavior.
  • a reduction in ingestion may be determined based on maintaining the patient's sensed activity level may be identified by the system. Expected results from changes in ingestion and activity may be identified by the system. As significant weight loss may not be measured until a patient has maintained compliance for a relatively extended period, more immediate short-term goals may also be identified by the system, including reduction in a size of the patient (such as a reduction in dress or pants size, a reduction in waist size, a reduction in neck, arm, or leg circumference, an increase in walking endurance or speed (or other quantifiable exercise parameters), or the like may also be identified).
  • Portal 150 may allow the patient to revise the short term and long term goals throughout the course of treatment, and may generate comparisons between the patients measured and sensed performance with their goals.
  • the system may also be capable of tracking performance against team goals, with a team comprising weight-loss patients of a group. Team goals may be generated by the team, a healthcare provider of the team, or both.
  • a physician could create a team of patients, each patient of the team having an implanted device. The physician could then work with the team to set a team's goals. This will allow the spirit of competition to be added into the mix for changing the behavior of the individual members of the team.
  • Portal 150 may include or be linked to one or more reference websites.
  • the portal will preferably have a number of selected reference sites for members to choose from. These sites will allow users to select from a number of tools which the users may prioritize or the site may keep a current list of most frequently used sites. This allows users to refer to a particular reference site based on changing priorities and behaviors. Suitable reference sites may include information on nutrition (food selection and net calorie), food preparation, activity guidelines (walking and other exercises), Kcal Expenditure charts (including activities of daily living), and/or the like.
  • Portal 150 will allow the user to communicate their health status to others, such as by providing the ability to send permission to view the patient's page to an MD, nutritionists, or a selected friend or group member.
  • the patient's page on the portal will typically store a history of the patient, including their weight, wireless or other uploads by or regarding the patient, and the like.
  • Educational links may facilitate access to nutritional information, exercise information, stress management techniques, and lifestyle coaching guides.
  • home monitor 120 or server 130 may communicate with scales (for measuring a weight of the patient or food), pedometers, and the like.
  • home monitor 120 receives wireless telemetry from a scale, glucose monitor, blood pressure cuff, and/or the like.
  • FIG. 1A shows an exemplary gastric band sensor system implant 900 .
  • This embodiment includes a gastric band, laparoscopically implanted, also known as a lap band 902 having a fluid-filled cuff 903 coupled to an implanted port 904 via a fluid conduit 906 .
  • the gastric band may comprise any such lap band currently marketed or available in clinical trials, as for example, the Realize® Adjustable Gastric Band from Ethicon Endo-Surgery, Inc., the Lap-Band® from Allergan, Inc., the MidbandTM from Medical Innovation Development, and Heliogast® Band from Helioscopie, MiniMizer Extra from Bariatric Solutions.
  • system 900 includes a housing 920 with circuitry comprising a processor 922 and a battery 924 to wirelessly transmit signals generated in response to signals from one or more sensors 928 to a data collection center.
  • the data collection center comprises the web portal 150 shown in FIG. 1 or a data server. Note that the housing 920 may optionally be incorporated into port 904 .
  • System 900 will sense ingestion using signals from at least one sensor 926 .
  • Sensor 926 comprises at least one of a pressure 928 (e.g. a MEMS-type, strain-gage, etc.), temperature, pH, acoustic, or optical sensor to detect food or drink intake.
  • Sensor 926 may also comprise an activity sensor, such as an accelerometer, heart rate sensor, temperature-based ingestion sensor and/or a core body temperature sensor.
  • the at least one sensor may be wired to the housing 920 , or communicate wirelessly with the processor in the housing.
  • FIG. 1B illustrates the electrical stimulation component of the gastric band sensor system implant 900 .
  • the stimulator 20 comprises a housing 21 implanted subcutaneously within a patient.
  • the stimulator further comprises leads 22 a, 23 a extending from the housing 21 through the abdomen and to the stomach 100 where electrodes 22 , 23 at the end of the leads 22 a, 23 a are implanted into the stomach muscle layer from the outside of the stomach 100 .
  • a method of implanting the stimulator housing 21 and laparoscopically implanting the electrodes 22 , 23 in the stomach 100 is generally known to those of ordinary skill in the art.
  • the housing 21 further comprises a sensor 24 a located on the housing 21 and/or a sensor 24 b located elsewhere in the patient and coupled to the electronic circuitry 29 , ( FIG. 1B ) in the housing 21 by lead 24 c.
  • the sensor 24 a or 24 b may, for example, include an accelerometer that is configured to sense motion of the patient.
  • the stimulator also includes sensors 25 , 26 , that are implanted on and in the stomach 100 , respectively, with leads 25 a, 26 a extending from the sensors 25 , 26 to the housing 21 . Sensor 26 is exposed to the inside of the stomach 100 while sensor 25 is attached to the outside of the stomach.
  • Leads 22 a, 23 a and 24 c, 25 a, 26 a are electrically coupled to the electronic circuitry 29 located in the housing 21 .
  • the sensors 25 , 26 may sense presence of material in the stomach, composition of such material and temperature, pH or pressure within the stomach, and/or patient motion corresponding to respiration or gross movement.
  • Sensors positioned on the stomach may also sense various parameters that indicate the actions of the stomach, e.g., movement, contractions.
  • the sensors positioned on the stomach may also utilize various imaging techniques, e.g., ultrasound, and light, to identify presence or composition of food or material in the stomach.
  • the electronic circuitry 29 is capable of producing various types of programmable waveforms that provide stimulation to the smooth muscle lining of the intestinal tract. It is well known to those of ordinary skill in the art, there are many different types of electrical stimulation programs and strategies which can be utilized for providing electrical stimulation parameters through the circuitry 29 , the principal focus being providing electrically stimulating parameters for the stomach. In one embodiment the focus of the electrical stimulation is to cause gastric retention of food to produce a sensation of satiety.
  • Another focus of the electrical stimulation may be to interfere with the innate peristalsis of the stomach, which is intended herein to mean to movement of the stomach that typically also acts to break down food and/or moves material towards the antrum or out of the stomach. Another focus is to cause a sensation of satiety by stimulating the stomach. Another focus is to control the secretions relating to the stomach or hunger by stimulating the stomach.
  • FIG. 1C An embodiment of the electronic circuitry 29 is illustrated in FIG. 1C .
  • the electronic circuitry 29 of the stimulator is located in the housing 21 .
  • the electronic circuitry 29 may be in a form of a standardized chip that may be used with one or a variety of sensors, including but not limited to those described herein.
  • the electronic circuitry 29 or similar electronic circuitry may also be included with separately implanted sensors or components of the system. Thus the various components may be configured to communicate with the other components through telemetry or similar signaling.
  • the circuitry 29 comprises, a microprocessor or controller 40 for controlling the operations of the electronic circuitry 29 , an internal clock 41 , and battery device 44 such as a pair of lithium iodine batteries for powering the various components of the circuit 29 .
  • the controller 40 and battery device 44 are coupled to each of the major components of the circuit as would be apparent to one of ordinary skill in the art.
  • the battery 44 has its output supplied to a DC-to-DC converter 44 a to provide a higher voltage, which is utilized for electrical stimulation pulses.
  • the DC-to-DC converter 44 a is conventional and provides an output voltage desired for stimulation.
  • the internal clock 41 may also include a real time clock component that communicates with the controller/microprocessor 40 .
  • the real time clock component may be used to control stimulation, e.g. by stimulating or allowing stimulation only at a particular time of the day.
  • the real time clock component may also provide a date/time stamp for detected events that are stored as information in a memory device.
  • the memory may be preserved by only saving information corresponding to an event of interest which is saved along with the time/date when the event occurred.
  • the controller 40 is coupled to stimulation driver 42 , which is coupled to stimulating electrodes (e.g., 22 , 23 ) that are used to provide electrical stimulation in accordance with programmed parameters, including in response to sensing conditions relating to the patient or the patient's intake of food as described herein.
  • stimulation driver 42 is coupled to stimulating electrodes (e.g., 22 , 23 ) that are used to provide electrical stimulation in accordance with programmed parameters, including in response to sensing conditions relating to the patient or the patient's intake of food as described herein.
  • the controller 40 is coupled to ROM 43 , which contains the program instructions for the controller 40 and any other permanently stored information that allows the microprocessor/controller 40 to operate.
  • the controller 40 addresses memory in ROM 43 through address bus 43 a and the ROM 43 provides the stored program instruction to the controller 40 via data bus 43 b.
  • the controller/processor 40 controls the telemetry coil 45 , which communicates with an external control or programming device 60 ( FIG. 1D ), e.g., via a modulated RF signal.
  • Controller/processor 40 is coupled to a buffered oscillator 51 that provides an RF signal to be emitted from the telemetry coil 45 .
  • the RF signal is preferably at about 100 kHz-5 Mhz so that the signal is efficiently transmitted through tissue.
  • the controller 40 controls the oscillator 51 and provides data to be modulated with the RF signal. For example, various sensed data such as motion, transmitted or reflected light parameters, pressure, pH, temperature, local muscle contraction, strain, impedance, electrical activity (EMG) etc., may be delivered via a modulated signal through the telemetry coil 45 .
  • various sensed data such as motion, transmitted or reflected light parameters, pressure, pH, temperature, local muscle contraction, strain, impedance, electrical activity (EMG) etc.
  • EMG electrical activity
  • Telemetry signals received on the telemetry coil 45 are detected in a detector circuit 51 a and communicated to controller 40 .
  • the detector circuit may be selected based on the modulation used for the telemetry signals.
  • the circuit 29 may also be coupled through A/D converters (with amplifiers) 46 a, 46 b, 46 c, 46 d to one or more sensors 25 , 26 , 24 a, 24 respectively.
  • the A/D converters convert a representative analog electrical signal from the sensors into a digital signal communicated to the controller 40 .
  • Suitable types of these sensors may include but are not limited to the types of sensor described herein.
  • Such sensors at various locations are coupled to the electronic circuit by way of lead wires or through alternative means of communication such as telemetry, wireless communication or indirectly through a separate controller e.g., controller 70 shown in FIG. 1D .
  • Controller 40 is coupled to RAM 50 via an address bus 50 a for addressing a location in RAM 50 and a bi-directional data bus 50 b for delivering information to and from RAM memory 50 .
  • the RAM memory 50 includes event memory 48 that temporarily stores data recorded by sensors 24 a, 24 , 25 , 26 , or electrodes 22 23 .
  • RAM memory 50 also includes a programmable memory 49 which may be programmed, for example, by an external programmer 60 .
  • the data stored in the programmable memory may include specifications for the electrical stimulation operating modes (e.g., waveform, type of stimulations: for pacing, inducing, interfering with or reversing contraction, for interfering with innate activity, for controlling biochemistry or secretions relating to the stomach, or other types of stimulation) and various procedures or responsive parameters (e.g., for turning on or off various sensing or stimulation functions, parameter modification, protocols or procedures for recognizing various conditions of the patient of the patient's gastrointestinal tract and protocols or procedures for responding to such recognition).
  • These data and procedure/protocol elements, including responsive elements that respond to sensed data may also be located in whole or in part in other controller devices that may be located independently from electronic circuitry 29 .
  • the programming may be done in response to sensed information or, it may be done automatically by an external controller or as desired by a treating physician, etc.
  • Sensed data acquired from the sensors or electrodes, provided to the controller 40 may be stored in event memory 48 in the RAM 50 .
  • the data stored in the event memory 48 may be sent intermittently as data bursts via the telemetry coil 45 , as opposed to continuously, in order to save battery power.
  • the clock may also mark or date/time stamp the data stored in event memory.
  • the processor also may select events based on predetermined thresholds or characteristics that are to be stored as a significant event, while other events are filtered out and not stored.
  • the electrodes 22 , 23 are coupled through A/D converters 46 e and 46 f to the microprocessor 40 .
  • A/D converter 46 e converts the electrical EMG signal sensed by the electrodes 22 , 23 into a digital signal representative of the EMG electrical activity, which is delivered to the microprocessor/controller 40 and stored in the event memory 48 in the RAM 50 .
  • the A/D converter 46 f converts the electrical signal sensed by the electrodes 22 , 23 and provided through the impedance circuit 53 described below, into a digital signal representative of tissue impedance, which is delivered to the microprocessor and stored in the event memory 48 in the RAM 50 .
  • the electrode 22 , 23 outputs are used to provide electrical stimulation delivered through the stimulation driver 42 to electrodes.
  • the stimulation modes and parameters can either be set using the external programmer 60 , or they may be set in response to sensory feedback.
  • the same electrode outputs may be used to sense impedance of the stomach tissue or of the contents of the stomach depending upon the location of the electrodes.
  • Impedance circuit 53 is used to sense impedance and EMG or other electrical activity information is provided to the processor 40 through A/D converter 46 e.
  • the electrodes 22 , 23 are coupled through coupling capacitors 55 a and 55 b respectively, to output of electrical stimulation driver 42 and input of A/D converters 46 e, 46 f.
  • the impedance circuit 53 comprises a constant current source oscillator 54 that oscillates at a frequency of 50-100 kHz, and A/D converter 46 f with an output coupled to the controller 40 .
  • the oscillator 54 provides a constant current source through electrodes 22 , 23 resulting in a voltage across the electrodes 22 , 23 that is representative of impedance, in view of the constant current.
  • the voltage is provided through and is converted by A/D converter 46 f to a digital signal representative of impedance.
  • A/D converter 46 f has a bandwidth that includes the 50 kHz frequency signal while filtering out the electrical stimulation signal that is delivered to the electrodes 22 , 23 through electrical stimulation driver 42 , and the EMG signal that is sensed by the electrodes 22 , 23 .
  • Both of the outputs are filtered out by A/D converter 46 f
  • A/D converter 46 e has a bandwidth that filters out the 50-100 kHz signal. Further, when a stimulation signal is being delivered, the controller 40 does not receive signals from A/D converters 46 e and 46 f Thus the EMG and impedance sensing functions and the stimulation deliver functions may be separated through the electronic circuitry 29 , though using the same electrodes.
  • An additional circuit 58 may be provided in the electronic circuitry 29 comprised of similar components configured like impedance circuit 53 .
  • the circuit 58 delivers an interrogating electrical pulse to the electrodes 16 , 17 and senses impedance of material between the electrodes.
  • the electrodes 16 , 17 are positioned to be in electrical contact with contents of materials that may be in the stomach
  • Additional stimulating sensing electrodes and corresponding signal processing circuits may also be provided.
  • FIG. 1C illustrates the electronic circuitry 63 for external programmer 60 .
  • the electronic circuitry 63 comprises: a microprocessor or controller 70 for controlling the operations of the electronic circuitry, an internal clock 71 , and a power source 74 such as battery device for powering the various components of the circuit 63 .
  • the controller 70 and battery device 74 are coupled to each of the major components of the circuit as would be apparent to one of ordinary skill in the art.
  • the controller 70 is coupled to a speaker 67 that provides audible alerts and a display 66 such as a CRT to display data such as recorded data, sensed parameters, treatment parameters and status of device (e.g. position or battery charge status).
  • the controller 70 is coupled through a buffer 64 to external input device 65 that is used to provide program parameter input, e.g. from a user, for a user to request data displayed in a desired format through display 66 or speaker 67 , or to turn device on and off
  • the external programmer 60 is also provided with an external data port 68 to interface with a computer and provide a means for bi-directional communication of data or commands.
  • the computer may provide programming or data to the controller/microprocessor 70 .
  • a user may also interface with the computer to provide treatment protocols or changes in protocols, etc. Also, a user may control the turning on and off of the stimulation program.
  • the controller 70 is coupled to ROM 73 , which contains the program instructions for the controller 70 and any other permanently stored information that allows the microprocessor/controller to operate.
  • the controller 70 addresses memory in ROM 73 through address bus 73 a and the ROM 73 provides the stored program instruction to the controller 70 via data bus 73 b.
  • the transceiver comprises a telemetry coil 74 , an oscillator 72 and an A/D converter 76 .
  • the controller 70 controls the telemetry coil 75 , which communicates with stimulator electronics 29 ( FIG. 1B ) through its telemetry coil 45 .
  • Controller 70 is coupled to an oscillator 72 that provides an RF signal, preferably having a characteristic frequency of 500 kHz or higher, to be emitted from the telemetry coil 75 .
  • the controller 70 controls the oscillator 72 and provides data to be modulated with the RF signal, for example, programming information, stimulation parameters, etc.
  • the telemetry coil 75 also receives information transmitted via RF signal from telemetry coil 45 on the stimulator 10 such as various sensed data, e.g., temperature, pressure, pH, impedance of the stomach or of its contents, optical characteristics of stomach contents, motion data, electrical activity (EMG), etc.
  • the received RF signal is passed through A/D converter 76 and is transmitted to the controller 70 .
  • the data is delivered to the event memory 78 in RAM 77 by way of data bus 77 b for temporary storage.
  • the data may be retrieved from RAM 77 by addressing the storage location via the address bus 77 a.
  • Event memory 78 temporarily stores data sensed by sensors 24 a, 24 , 25 , 26 , or electrodes 22 , 23 ; recorded through controller 40 ; and delivered via telemetry to the external programmer 60 .
  • the data may then be downloaded onto a computer using the external data port 68 .
  • the RAM 77 also includes a programmable memory 79 which may be programmed, for example, to specify operating modes such as waveform, frequency, pulse width, amplitude, repetition rate, etc. which programming is then telemetrically communicated to the stimulation device 20 .
  • the modes and parameters can either be set using an external programmer 60 and/or set in response to sensory feedback according to programs.
  • the stimulator 20 may be programmed to deliver electrical stimulation in response to sensed parameters.
  • the sensors 24 a, 24 , 25 , 26 , or electrodes 22 , 23 may comprise (but are not limited to): a temperature sensor that may sense a change in temperature or a rate of change in temperature that indicates ingestion of food or liquid; a pH sensor that may be used to determine when food has been ingested; an optical emitter/sensor that may be used to determine the presence and/or composition of food; a pressure sensors that may be used to sense motility patterns, e.g.
  • a contractions sensor that may provide information on stomach contractions and local responses to stimulation
  • an impedance sensor that may provide information on the content of the stomach and/or an impedance sensor that may determine when a characteristic EMG pattern exists to determine wakefulness of a subject
  • a motion sensor that determines an activity level or wakefulness of a subject
  • a biochemical sensor that provide information on biochemical compositions relating to the stomach such as secretions.
  • the responsive devices may comprise at least one sensor and at least one responsive element. From sensed information, the responsive element determines the existence of a condition, e.g., presence of food; ingestion of food; type of food ingested; activity level of a subject; wakefulness of a subject; time of a daily cycle or schedule; contractions of the stomach, etc.
  • a condition e.g., presence of food; ingestion of food; type of food ingested; activity level of a subject; wakefulness of a subject; time of a daily cycle or schedule; contractions of the stomach, etc.
  • the responsive element may combine a number of sensed parameters to determine the existence of a condition or circumstance or a probability of the existence of a condition or circumstance.
  • the responsive element may thereupon determine a course of treatment, including protocols, stimulation parameters and whether or not to stimulate.
  • responsive element may respond by stimulating to interfere with the stomach contractions; to slow, stop or reverse the innate peristaltic contractions that tend to move food through the stomach.
  • the combined determination of temperature changes indicating likelihood of food ingestion, and an accelerometer indicating that a subject is not sleeping or is not highly active may trigger a responsive element to stimulate the stomach to retain food for a predetermined period of time.
  • the accelerometer can determine a low level of activity indicating likelihood of a sleep state, but may be overridden by a temperature sensor sensing that food has been ingested and thus requiring stimulation.
  • PH may be used in a similar manner as temperature to indicate a likelihood of food ingestion.
  • a timer may also confirm the likelihood that food is being eaten given the time of day, or may refrain from stimulating in spite of food being ingested if it is a certain time of day, e.g., when the stomach is naturally cleaning out the stomach as it typically does during the night.
  • the responsive element may receive input from one or more sensors and, in response, the responsive element may interrogate another sensor for information to determine a course of action. This may be used to save battery or power consumption. This may also be used to confirm the existence of a condition or circumstance using more than one sensor. For example, one or more sensors may provide information that food has been ingested. Upon making this determination, another sensor may be triggered to determine what type of food has been ingested. For example, an impedance sensor may determine characteristics of the content of the stomach by measuring the impedance of the contents of the stomach. An optical emitter/sensor may sense the light reflectance/transmission characteristics of contents of the stomach. This information may be recorded in a memory device and downloaded.
  • the information may elicit a simulation response controlled by the responsive element when a certain type of food is detected.
  • foods may be provided as part of an eating regimen that have markers for different types of food. Gastric retention of some foods may be created while permitting movement of others out of the stomach.
  • FIGS. 2A-2C illustrate alternative embodiments of system 900 .
  • FIG. 2A shows sensor 928 coupled to the fluid-filled cuff 903 , the housing 920 , circuitry 922 , and battery 924 are also attached to the lap band 902 .
  • FIG. 2B shows sensor 928 coupled to the fluid filled cuff 903 , while housing 920 , circuitry 922 and battery 924 are located outside the lap band 902 , optionally attached to the implanted port 904 .
  • FIG. 2C shows an embodiment of system 900 comprising at least two sensors 926 .
  • Pressure sensor 928 may be coupled to the fluid-filled cuff 903 .
  • the second sensor 926 may comprise a temperature sensor 927 penetrating the stomach wall, coupled to the housing 920 or to the fluid filled cuff 903 and pressure sensor 928 (not shown). This embodiment is particularly suitable when the sensor 928 must collect data from inside the stomach.
  • the second sensor 926 may comprise a sensor attached to the outside of the stomach 925 , coupled to the housing 920 or to the fluid filled cuff 903 and pressure sensor 928 (not shown).
  • system 900 comprises a combination of at least three sensors 928 , 927 , and 925 , as described above.
  • FIG. 2D shows an embodiment of system 900 comprising two pressure sensors 928 coupled to the fluid-filled cuff 903 .
  • One pressure sensor 928 may located above the fluid filled cuff, to measure the pressure above the lap band, and the other may be located below the lap band to measure the pressure in the stomach, below the level of the lap band.
  • FIG. 2E shows an alternative embodiment of system 900 comprising at least two lap bands, each lap band comprising at least one sensor 926 .
  • the lap bands may comprise different elasticities and each lap band's elasticity may be changed dynamically.
  • the superiorly-located lap band may be used to reduce food intake and sense ingestion events with the at least one sensor.
  • the inferiorly-placed lap band may be used primarily for sensing purposes with the at least one sensor. Since the inferiorly-placed lap band may not be inflated, it may need to be fixed in its desired location with seromuscular sutures such as the MiniMizer Extra from Bariatric Solutions, or other means known in the art.
  • the dual lap band set-up may also comprise other sensors, such as for example a combination of optical sensors that can measure ingestion velocities in the lower esophagus and upper portion of the stomach.
  • FIG. 3 illustrates ingestion of food or drink into a stomach.
  • pressure increases within the lap band, in the upper portion of the stomach and in the lower esophagus.
  • the lower esophagus and upper portion or the stomach will expand to accommodate the incoming food as shown by dashed lines in FIG. 3 .
  • FIG. 3A shows a cross-sectional view of the superior portion of the stomach constricted by a lap band 902 with a fluid filled cuff 903 .
  • the lap band restricts the perimeter of the stomach, thus slowing down the passage of the food through the stomach.
  • FIGS. 4A-4C show the pressure waveforms from pressure sensor signals one might expect with food or drink input.
  • FIG. 4A shows the expected pressure waveforms from an ingestion of food 1000 . With each swallow of solid food the pressure on the band increases ( 1020 ). As the food fills up the gastric pouch, the lower esophagus peristaltic waves are initiated in the esophagus and stomach to push food through the narrow opening created by the band. If the food is solid and dry, the digestion and peristaltic action on the food will not be enough to push the food out as fast it is entering the stomach. At this point the patient will feel severe discomfort and be forced to stop eating, or a vomiting reflex may occur, and maximum pressure is seen at the band ( 1000 ). After a delay, the peristaltic waves eventually empty the gastric pouch and baseline pressure will be again detected at the band ( 1040 ).
  • FIG. 4B illustrates an overeating event; as food is ingested the pressure increases moderately 1060 until a plateau is reached 1070 . However, when overeating occurs, the increased food intake beyond the volume of a normal ingestion event increases the pressure at the band and proximal portion of the stomach to a much higher level 1080 . This high pressure sets off the vomiting reflex 1090 ; after vomiting and the pressure rapidly decreases 1100 with the emptying of the proximal portion of the stomach.
  • FIG. 4C shows the expected pressure waveforms 1200 from a drinking event.
  • the expected pressure wave forms from ingestion of a solid upon ingestion of a drink 1210 , there will be less buildup of pressure because liquid passes through the band with little resistance.
  • there will be transient pressure increases 1220 with each swallow of liquid as the increase in volume will temporarily expand the small upper portion of the stomach.
  • the liquid can exit the proximal portion of the stomach rapidly, it is unlikely that drink intake will be so fast as to cause the pressure to increase to such an extent that a vomiting reflex would occur.
  • the differences in pressure waveforms between a normal eating event and a drinking event can be distinguished by the processor. Drinking events will look like multiple positive pressure transients with a return to baseline pressure very quickly after each transient (nominally less than 30 sec). While an intake of any significant volume of solid food (>20 ml) will lead to an increase in pressure that lasts multiple minutes (5-30 min). In addition because of the pressure put on the gastric pouch and lower esophagus during the intake of solid foods, peristaltic waves will cause large pressure transients at the band, on the order of 10's of mm Hg.
  • FIG. 5 shows the pressure waveforms 1300 that occur with injection of fluid, e.g. saline, into the port of the lap band.
  • the baseline pressure 1210 increases as fluid is injected into the port.
  • the increase in fluid (saline) volume expands the elastic portion of the port so that it creates a smaller diameter for food to pass through, which leads to an increase in pressure 1320 upon ingestion of food.
  • the pressure changes caused by eating events with eating events 1320 or drinking events 1330 will manifest themselves on top of the baseline pressure.
  • this baseline pressure change may be transient as the volume of the lap band may adjust to accommodate the saline.
  • the occurrence of pressure transients due to peristaltic waves following drink intake may indicate that the band is too tight. These peristaltic waves may be detected at the band and lead to automated adjustment of the band to reduce pressure.
  • FIG. 6 shows pressure waveforms from peristaltic waves 1400 .
  • Slow waves or peristaltic action in the stomach that is always present, is seen as low amplitude pressure waves at a frequency of about 3 per minute 1410 .
  • the baseline pressure increases and pressure transients due to swallowing and peristaltic action are seen riding on the baseline change.
  • the pressure at the band and gastric pouch increases and the pressure transients due to peristalsis increase in amplitude and frequency. As the bolus moves forward, the pressure decreases behind it.
  • FIG. 6 shows the initial small transient pressure increases due to peristaltic activity. The peristaltic waves that occur without the presence of food cause little or no pressure change.
  • the peristaltic waves would cause pressure waves of amplitude and duration that is proportional to the amplitude and duration of the peristaltic wave 1430 .
  • the peristaltic activity at the end of the meal is higher in order to push the food out of the stomach towards the small intestine, pressure undulations 1440 caused by these peristaltic waves will occur as the pressure recovers to the former baseline.
  • Pressure waves due to peristaltic activity need to be differentiated from pressure waves due to food intake.
  • these pressure waves can be differentiated because of their higher frequency and the amplitude of the pressure transients is significantly higher than the overall increased pressure waves due to food intake.
  • temperature sensors can detect rapid changes in homeostatic temperature within the stomach cavity. The rapid changes in homeostatic temperature can be used to detect ingestion events, and in particular, ingestions of liquids.
  • impedance spectrometers could determine water content, acidity or other through the measure of impedance of materials; optical spectrometers may determine the composition of ingested matter (i.e. sugar, carbohydrate, and fat content); pH sensors may determine the ingestion of water and other food through changes in acidity from baseline, and acoustic sensors may detect sound waves as each swallow occurs, and as a food bolus passes through the lap band, etc.
  • Remote communication with the system 900 will allow the use of an automated patient support system that would allow coaching type feedback with regards to their activity and food intake, U.S. Patent Application Ser. No. 61/166,636.
  • an electrical conduit extends from a temperature sensor within the stomach, through a transgastric port, and to circuitry 922 .
  • This electrical conduit or lead could, but need not have any stimulating electrodes.
  • Suitable trans-gastric temperature sensing probes and ingestion analysis may described in (or may be modified from those described in) U.S. Provisional Patent Application No. 61/122,315, filed on Dec. 12, 2008, the full disclosure of which is incorporated herein by reference, and U.S. patent application Ser. No. 12/637,452 filed on Dec. 14, 2009.
  • the pressure waveforms from food 1000 and drink ingestion 1200 can provide input to a food and drink selection algorithm.
  • the detection may be based on slope, maximum deviation from baseline, or other signal characteristics of the pressure waveform regarding event classification.
  • diagnostics are stored based on the timing and duration of the intake. The diagnostics may be used in monitoring patient's weight loss therapy.
  • pressure sensors may collect pressure readings above and below the restriction created by the inflated lap band.
  • the two pressure readings may be used to classify the ingestion event: for example if the pressure reading above the restriction is higher than the one below, the ingestion will be classified as a solid; if the pressure reading above the restriction is lower than the one below, the ingestion will be classified as a liquid or an attempt to cheat the lap band by blending solid food with a liquid to bypass the restriction of the lap band.
  • signals from a combination of pressure sensor and a temperature sensor may be used to improve the accuracy of the food detection algorithm.
  • a high temperature change combined with a low pressure change over a certain time interval will lead to a classification of the ingestion event as a liquid.
  • a low temperature change, combined with a high pressure change will lead to a classification of the ingestion event as a solid.
  • a high temperature change, combined with a high pressure change will lead to a classification of the ingestion event as a combined solid and liquid.
  • the detection of these peristaltic waves by the pressure sensor in the lap band sensor system may aid in the determination of caloric or fat content of a meal.
  • Fat and protein chemodetectors in the small intestine provide feedback information through a vagal pathway that controls the amplitude and duration of the peristaltic activity in the stomach and increases the duration of time the food spends in the stomach.
  • the main contractions occur in the antral portion of the stomach, so they may be detected easier with an intragastric balloon, but as the stomach empties the strong peristaltic activity rises higher towards the body of the stomach and these changes could be sensed by a pressure sensor located in the lap band.
  • the food and drink intake data may be used to trigger automatic tightening of the lap band upon detection of an ingestion event.
  • the implanted device may be capable of electrical stimulation for therapy delivery to an appropriate portion of the stomach wall.
  • electrodes may be placed inside the lap band, to provide electrical stimulation to the portion of the stomach in contact with the lap band.
  • the pressure waveforms will trigger therapy, with the therapy type dependent on the classification of event.
  • the lap band may be only partially inflated, to minimize the side effects such as nausea and vomiting; the partial inflation of the lap band will physically restrict the food intake to a certain extent, while the electrical stimulation to further curb the patient's appetite. A patient will be able to achieve substantial weight loss with minimal side effects.
  • the lap band sensor system is capable of automatically adjusting the lap band.
  • the pressure signal could be used to automatically determine when a band adjustment is needed. The adjustment may be based on the baseline pressure level, so that the band could be adjusted to stay at a target level.
  • the lap band sensor system may comprise an algorithm to relieve pressure on the lap band for certain periods during the day, between meals and/or at night, to avoid erosion and pressure damage to the stomach tissue under the band.
  • the pressure signal may be useful for detecting pre-vomiting and optimizing lap band adjustment.
  • System 900 would optionally include a 3D accelerometer and/or a heart rate sensor. This sensor would provide feedback to the patients as to whether they are meeting their activity and exercise goals. Further, these sensors would provide estimates as to the number of calories burned in during exercise and/or total daily energy expenditure, as disclosed in U.S. Provisional Patent Application No. 61/241,154 which is hereby incorporated by reference.
  • the activity sensor(s) may allow therapy adjustment, such as loosening of the gastric band and lessening the intensity or stopping electrical stimulation, during exercise sessions and for a short period, up to thirty minutes after exercising, to encourage healthy eating patterns.
  • the accelerometer data may also reduce the tightness of the lap band when sleep is detected. This may reduce the side effects that have been associated with lap banding, such as acid reflux.
  • An alternative embodiment includes a intragastric balloon system 1500 having sensors and telemetry circuitry suitable for implantation in the stomach cavity, endoscopically deployed stimulation systems having sensors and telemetry circuitry suitable for implantation in the stomach cavity, and the like.
  • the intragastric balloon may comprise any such balloon currently marketed or available in clinical trials, as for example, the BioEnterics® Intragastric Balloon (BIB®) System of the dual intragastric balloon developed by ReShape MedicalTM Inc.
  • BIOShape MedicalTM Inc BioEnterics® Intragastric Balloon
  • FIG. 7 shows an exemplary intragastric balloon-sensor-monitor system 1500 .
  • the sensor-monitor device 1520 may be used in conjunction with an intragastric balloon 1510 .
  • the sensor-monitor device 1520 could be inserted within the balloon so that when the balloon is filled with saline inside the stomach, the device would be enclosed within the balloon.
  • the sensor-monitor device will comprise a sensor 1530 ; the sensor may comprise a pressure sensor that would pick up pressure changes within the balloon.
  • the intragastric balloon-sensor-monitoring system 1500 comprises a monitoring device placed outside the balloon, where a pressure sensor 1520 is attached to the surface of the monitoring device.
  • sensors such as pressure sensors (e.g. a MEMS-type, strain-gage, etc.), temperature, pH, acoustic, optical sensor to detect food or drink intake and/or activity sensor, such as an accelerometer, heart rate sensor, and/or a core body temperature sensor.
  • the at least one sensor may be wired to the sensor-monitor device 1520 , or communicate wirelessly with the processor in the housing.
  • the monitoring device could be implanted at the time of surgery, potentially at one of the incisions used as a port for the laparoscopic tools.
  • the sensors and monitoring device may also be used in conjunction with a cardiac device or insulin pump who have cardiac problems or diabetes as a co-morbidity with obesity.
  • FIG. 8 shows a method of treating a patient with an unhealthy ingestion pattern 2000 .
  • a therapeutic implant comprising a gastric band sensor system or an intragastric balloon sensor system 2010 is implanted into a patient.
  • the sensor(s) in the system will sense ingestion by the patient and generate signals correlating to the ingestion 2020 .
  • Ingestion deemed unhealthy will be inhibited 2030 .
  • patients are given behavioral guidelines to maximize solid food ingestion, and not to drink high calorie liquids or purees. If the device detects a high proportion of liquid intake, then actions will be taken to inhibit the next liquid intake.
  • Another example of unhealthy ingestion would be when the patient has consumed too many calories over a certain period of time based on food content detection.
  • a therapeutic implant comprising a gastric band sensor system or an intragastric balloon sensor system 2010 is implanted into a patient.
  • the sensor(s) in the system will sense ingestion by the patient and generate signals correlating to the ingestion 2020 .
  • Ingestion deemed unhealthy will be inhibited 2040 by either showing a display to a lifestyle coach and/or patient 2050 , an increased pressure within the bladder of the lap band or within the intragastric balloon 2060 , or electrical stimulation of the gastrointestinal tract tissue with the implant 2070 .
  • a therapeutic implant comprising a gastric band sensor system or an intragastric balloon sensor system 2010 is implanted into a patient.
  • the sensor(s) in the system will sense ingestion by the patient 2080 and signals will be transmitted in response to the sensing 2090 , and ingestion information will be displayed to the patient 2100 and/or the patient will be treated 2110 .
  • a therapeutic implant comprising a gastric band sensor system or an intragastric balloon sensor system 2010 is implanted into a patient.
  • the sensor(s) in the system will sense physical activity by the patient 2120 and signals will be transmitted in response to the sensing 2130 , and physical activity information will be displayed to the patient 2140 and/or the patient will be treated 2150 .
  • the patient will receive both ingestion and activity information, in terms of energy balance; thus the patient will be able to easily visualize whether the calorie intake has been larger than the calorie output, or vice versa.
  • a therapeutic implant comprising a gastric band sensor system or an intragastric balloon sensor system 2010 is implanted into a patient.
  • signals will be transmitted to the patient to stop the unhealthy ingestion 2170 .
  • FIG. 8E shows another alternative treatment method where a therapeutic implant comprising a gastric band sensor system or an intragastric balloon sensor system 2010 is implanted into a patient. Allowed ingestions are identified 2180 and the ingested material is allowed to pass through the implant system 2190 . Unhealthy ingestions are identified 2200 and signals are transmitted to the implant to restrict unhealthy ingestion 2210 .

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US20110087076A1 (en) 2011-04-14
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US8715181B2 (en) 2014-05-06
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AU2010232407B2 (en) 2014-10-30
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US20140295390A1 (en) 2014-10-02
CN102448365A (zh) 2012-05-09

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