Volume monitoring for implantable fluid delivery devices
AssigneeMedtronic, Inc.
InventorsCynthia R. Nelson Konen, Irfan Z. Ali, Keith A. Miesel, Scott L. Kalpin
Life of this patent
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Abstract
Unexpected changes in the volume of therapeutic fluid in the reservoir of a fluid delivery device are detected based on changes in the pressure of the reservoir measured over a period of time by a pressure sensor. Additionally, an ambulatory reservoir fluid volume gauge is provided to indicate an actual volume of therapeutic fluid in a fluid delivery device reservoir. The actual volume of therapeutic fluid in the reservoir indicated by the ambulatory reservoir fluid volume gauge is determined based on changes in the pressure in the reservoir measured over a period of time by a pressure sensor.
Claims65
A therapeutic fluid delivery system comprising:
- a reservoir configured to house a therapeutic fluid;
- a pressure sensor configured to measure a pressure of the reservoir;
- and
- a processor configured to detect an unexpected change in a volume of the therapeutic fluid in the reservoir based on changes in the pressure of the reservoir measured by the pressure sensor over time.
A method comprising:
- measuring a pressure of a reservoir of a fluid delivery device with a pressure sensor;
- and
- detecting an unexpected change in a volume of therapeutic fluid in the reservoir based on changes in the pressure of the reservoir measured by the pressure sensor over time.
A computer-readable storage medium comprising instructions for causing a programmable processor to:
- cause a pressure sensor to measure a pressure of a reservoir of a fluid delivery device with a pressure sensor;
- and
- detect an unexpected change in a volume of therapeutic fluid in the reservoir based on changes in the pressure of the reservoir measured by the pressure sensor over time.
A fluid delivery system comprising:
- means for measuring a pressure of a reservoir of a fluid delivery device with a pressure sensor;
- and
- means for detecting an unexpected change in a volume of therapeutic fluid in the reservoir based on changes in the pressure of the reservoir measured by the means for measuring the pressure of the reservoir over time.
A therapeutic fluid delivery system comprising:
- a reservoir configured to house a therapeutic fluid;
- a pressure sensor configured to measure a pressure of the reservoir;
- an ambulatory reservoir fluid volume gauge;
- and
- a processor configured to determine an actual volume of the therapeutic fluid in the reservoir based on changes in the pressure of the reservoir measured by the pressure sensor over time and to control the ambulatory fluid volume gauge to indicate the actual volume of the therapeutic fluid in the reservoir.
A method comprising:
- measuring a pressure of a reservoir of a fluid delivery device with a pressure sensor;
- determining an actual volume of therapeutic fluid in the reservoir based on changes in the pressure of the reservoir measured by the pressure sensor over time;
- and
- controlling an ambulatory fluid volume gauge to indicate the actual volume of therapeutic fluid in the reservoir.
A fluid delivery system comprising:
- means for measuring a pressure of a reservoir of a fluid delivery device with a pressure sensor;
- means for determining an actual volume of therapeutic fluid in the reservoir based on changes in the pressure of the reservoir measured by the pressure sensor over time;
- and
- means for controlling an ambulatory fluid volume gauge to indicate the actual volume of therapeutic fluid in the reservoir.
A computer-readable storage medium comprising instructions for causing a programmable processor to:
- measure a pressure of a reservoir of a fluid delivery device with a pressure sensor;
- determine an actual volume of therapeutic fluid in the reservoir based on changes in the pressure of the reservoir measured by the pressure sensor over time;
- and
- control an ambulatory fluid volume gauge to indicate the actual volume of therapeutic fluid in the reservoir.
A method comprising:
- measuring a pressure of a reservoir of a fluid delivery device with a pressure sensor;
- determining an actual rate at which the therapeutic fluid is delivered from the reservoir based on changes in the pressure of the reservoir measured by the pressure sensor;
- integrating the actual rate at which the therapeutic fluid is delivered from the reservoir over a period of time over which changes in the pressure of the reservoir are measured by the pressure sensor to determine an actual volume of therapeutic fluid in the reservoir;
- and
- controlling an ambulatory fluid volume gauge to indicate the actual volume of therapeutic fluid in the reservoir.
Dependencies are inferred from the claim text.