Infusion pump and method to enhance long term medication delivery accuracy
First Claim
1. An infusion pump for pumping fluid though an administration set at a constant flow rate over a long duration, the pump comprising:
- a pumping mechanism configured for pumping fluid, said pumping mechanism operating at a pulse frequency; and
a controller for controlling said pulse frequency of said pumping mechanism; and
one or more sensors capable of measuring at least one characteristic value relating to a status of said pumping mechanism;
said controller configured for operating said pumping mechanism at a first pulse frequency;
said one or more sensors measure said at least one characteristic value;
wherein when said at least one characteristic value meets a threshold value, said controller causes said pumping mechanism to operate at a second pulse frequency, said second pulse frequency being different from said first pulse frequency; and
wherein at least one of said one or more sensors is a timer, and wherein said threshold value is an elapsed time.
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Accused Products
Abstract
An infusion pump is provided for pumping fluid though an administration set at a constant flow rate. The pump includes a pumping mechanism for pumping fluid and operates at a pulse frequency, and a controller controls the pulse frequency. Additionally, the pump has one or more sensors configured for measuring at least one characteristic value relating to a status of the infusion pump. The controller is configured for causing the pumping mechanism to operate at a first pulse frequency, and the one or more sensors measure the characteristic value. When the measured characteristic value meets a threshold value, the controller causes the pumping mechanism to operate at a second pulse frequency different from the first pulse frequency.
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Citations
18 Claims
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1. An infusion pump for pumping fluid though an administration set at a constant flow rate over a long duration, the pump comprising:
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a pumping mechanism configured for pumping fluid, said pumping mechanism operating at a pulse frequency; and a controller for controlling said pulse frequency of said pumping mechanism; and one or more sensors capable of measuring at least one characteristic value relating to a status of said pumping mechanism; said controller configured for operating said pumping mechanism at a first pulse frequency; said one or more sensors measure said at least one characteristic value; wherein when said at least one characteristic value meets a threshold value, said controller causes said pumping mechanism to operate at a second pulse frequency, said second pulse frequency being different from said first pulse frequency; and wherein at least one of said one or more sensors is a timer, and wherein said threshold value is an elapsed time. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An infusion pump for pumping fluid though an administration set at a constant flow rate over a long duration, the pump comprising:
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a pumping mechanism configured for pumping fluid by compressing the administration set, said pumping mechanism operating at a pulse frequency; one or more pressure sensors connected to said pumping mechanism and capable of measuring a springback force of the administration set after being compressed by said pumping mechanism; and a controller for controlling said pulse frequency of said pumping mechanism, wherein said controller causes said pumping mechanism to operate at a first pulse frequency; said one or more pressure sensors measuring said springback force; when said springback force measured by said one or more pressure sensors is lower than a threshold value, said controller causes said pumping mechanism to operate at a second pulse frequency, said second pulse frequency being greater than said first pulse frequency; and wherein said controller causes said pumping mechanism to stop pumping if an ambient temperature is less than about 15°
C. or if said ambient temperature is greater than about 38°
C. - View Dependent Claims (9, 10, 11, 12, 13)
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14. An infusion pump for pumping fluid through an administration set at a constant flow rate over a long duration, the pump comprising:
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a pumping mechanism for pumping fluid, said pumping mechanism operating at a pulse frequency; and a controller for controlling said pulse frequency of said pumping mechanism; said controller is configured for causing said pumping mechanism to operate at a first pulse frequency for a period of time; after said period of time has elapsed, said controller is configured for causing said pumping mechanism to operate at a second pulse frequency, said second pulse frequency being greater than said first pulse frequency; and wherein said period of time is a first period of time, and wherein after a second period of time longer than said first period of time has elapsed, said controller causes said pumping mechanism to operate at a third pulse frequency, said third pulse frequency being greater than said first pulse frequency and said second pulse frequency. - View Dependent Claims (15, 16, 17, 18)
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Specification