Portable device for infusing insulin on the basis of glycemic measurements
First Claim
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1. A portable device having a circuit for blood drawing and re-immission, said circuit comprising:
- (a) means for drawing blood from a patient into the circuit;
(b) a filter connected to said means for drawing blood, said filter being permeable only to the water and microsolutes of the drawn blood such that said water and microsolutes pass through the filter whereas other constituents of the drawn blood including cells, proteins and other macromolecules do not pass through the filter;
(c) a glucose sensor connected to said filter for receiving said water and microsolutes;
(d) means for connecting said glucose sensor to said filter directly such that no substance other than said water and microsolutes flows between said filter and said glucose sensor;
(e) a microprocessor connected to said glucose sensor which resonds to the glucose levels measured by said sensor by sending control signals; and
(f) means connected to said microprocessor for infusing glucose and or insulin into the patient in response to said control signals received from the microprocessor.
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Abstract
The invention relates to a device made by a concentric dual lumen catheter, a pump, a small hemofilter, a glucose sensor which, by means of a microinfusion pump with a stepping motor controlled by a microprocessor can, through another concentric dual lumen catheter, inject insulin or glucose into the blood stream depending on glycemic levels.
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Citations
10 Claims
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1. A portable device having a circuit for blood drawing and re-immission, said circuit comprising:
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(a) means for drawing blood from a patient into the circuit; (b) a filter connected to said means for drawing blood, said filter being permeable only to the water and microsolutes of the drawn blood such that said water and microsolutes pass through the filter whereas other constituents of the drawn blood including cells, proteins and other macromolecules do not pass through the filter; (c) a glucose sensor connected to said filter for receiving said water and microsolutes; (d) means for connecting said glucose sensor to said filter directly such that no substance other than said water and microsolutes flows between said filter and said glucose sensor; (e) a microprocessor connected to said glucose sensor which resonds to the glucose levels measured by said sensor by sending control signals; and (f) means connected to said microprocessor for infusing glucose and or insulin into the patient in response to said control signals received from the microprocessor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification