DUAL RATE INSULIN PUMP
First Claim
1. A programmable pump for dispensing a fluid at varying flow rates to a patient comprising:
- a constant flow module including a first chamber housing the fluid, first and second resistor capillaries in fluid communication with the first chamber, and a first opening in fluid communication with a catheter;
a control module attached to the constant flow module and including a first motor assembly and valve block, the valve block being in fluid communication with the first and second resistor capillaries and the first opening, the first motor assembly having a first motor and a first valve connected with the first motor;
a second valve configured to limit flow of fluid from the second resistor capillary to the valve block;
a first pressure sensor configured to determine a first pressure of the fluid within the first chamber; and
a second pressure sensor configured to determine a second pressure of the fluid within the valve block,wherein the flow rate of the fluid dispelled from the first chamber is affected by varying positioning of the valve.
2 Assignments
0 Petitions
Accused Products
Abstract
A programmable implantable insulin pump is disclosed. The pump includes an implantable pump and a hermetically sealed module. The module provides for varying flow rates of fluid being dispensed from the pump or may provide for a constant flow rate of such fluid. In the case of varying flow rate capabilities, the module preferably includes one or more sensors to determine information relating to the pressure of the fluid, electronics for analyzing the pressure information and determining the flow rate of the fluid, and a mechanism for physically altering the flow rate. First and second resistor capillaries are included in the implantable pump to provide a large range of flow rate capabilities between basal operation and bolus operation. Methods of dispensing a medicament to a patient utilizing such a system are also disclosed, as are variations of the pump system.
6 Citations
24 Claims
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1. A programmable pump for dispensing a fluid at varying flow rates to a patient comprising:
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a constant flow module including a first chamber housing the fluid, first and second resistor capillaries in fluid communication with the first chamber, and a first opening in fluid communication with a catheter; a control module attached to the constant flow module and including a first motor assembly and valve block, the valve block being in fluid communication with the first and second resistor capillaries and the first opening, the first motor assembly having a first motor and a first valve connected with the first motor; a second valve configured to limit flow of fluid from the second resistor capillary to the valve block; a first pressure sensor configured to determine a first pressure of the fluid within the first chamber; and a second pressure sensor configured to determine a second pressure of the fluid within the valve block, wherein the flow rate of the fluid dispelled from the first chamber is affected by varying positioning of the valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A programmable pump for dispensing a fluid at varying flow rates to a patient comprising:
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a constant flow module including a first chamber housing the fluid and a first opening in fluid communication with a catheter; a first resistor capillary in fluid communication with the first chamber and having a first maximum flow rate; a second resistor capillary in fluid communication with the first chamber and having a second maximum flow rate between approximately 50 and approximately 1,000 times greater than the first maximum flow rate; a control module attached to the constant flow module and including a first motor assembly and valve block, the valve block being in fluid communication with the first and second resistor capillaries and the first opening, the first motor assembly having a first motor and a first valve connected with the first motor; and a second valve configured to limit flow of fluid from the second resistor capillary to the valve block; a first pressure sensor configured to determine a first pressure of the fluid within the first chamber; and a second pressure sensor configured to determine a second pressure of the fluid within the valve block, wherein the flow rate of the fluid dispelled from the first chamber is affected by varying positioning of the valve and the pump employs exactly two pressure sensors to measure the flow rate of the fluid.
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24. A method of dispensing a fluid at varying flow rates from a programmable pump to a patient comprising:
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simultaneously dispensing the fluid from a first chamber through a first resistor capillary having a first maximum flow and through a second resistor capillary having a second maximum flow rate between approximately 50 and approximately 1,000 times greater than the first maximum flow rate; operating a first motor to change a position of a first valve to vary a flow rate of the fluid passing from the first and second resistors through a valve block that houses the first valve; operating a second valve to limit flow of the fluid from the second resistor capillary to the valve block; determining a first pressure of the fluid within the first chamber with a first pressure sensor; and determining a second pressure of the fluid within the valve block with a second pressure sensor.
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Specification