INFUSION DEVICE WITH IMPEDANCE MEASUREMENT CROSS-REFERENCE TO RELATED APPLICATIONS
First Claim
1. An ambulatory infusion device for the infusion of a liquid drug into a patient'"'"'s body over an extended time period, comprising:
- a) an infusion cannula designed to be placed in the patient'"'"'s subcutaneous tissue;
b) at least two subcutaneous electrodes, the at least two subcutaneous electrodes being comprised by the infusion cannula and being placed in the subcutaneous tissue;
c) an impedance measuring unit, the impedance measuring unit being operatively coupled to the at least two electrodes and configured to measure at least one impedance value between the at least two electrodes, a variation of the at least one impedance value reflecting a displacement of interstitial fluid by drug upon drug administration;
d) an event trigger unit operatively coupled to the impedance measuring unit and being configured to evaluate the at least one impedance value and to generate an event trigger if evaluation of the at least one impedance value indicates the occurrence of an administration anomaly.
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Accused Products
Abstract
An ambulatory infusion device for the infusion of a liquid drug into a patient'"'"'s body over an extended time period includes an infusion cannula designed to be placed in the patient'"'"'s subcutaneous tissue. At least two subcutaneous electrodes are comprised by the infusion cannula and are placed in the subcutaneous tissue. An impedance measuring unit is operatively coupled to the at least two electrodes and is configured to measure at least one impedance value between the at least two electrodes. A variation of the at least one impedance value reflects a displacement of interstitial fluid by drug upon drug administration. An event trigger unit is operatively coupled to the impedance measuring unit and being configured to evaluate the at least one impedance value and to generate an event trigger if evaluation of the at least one impedance value indicates the occurrence of an administration anomaly.
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Citations
15 Claims
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1. An ambulatory infusion device for the infusion of a liquid drug into a patient'"'"'s body over an extended time period, comprising:
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a) an infusion cannula designed to be placed in the patient'"'"'s subcutaneous tissue; b) at least two subcutaneous electrodes, the at least two subcutaneous electrodes being comprised by the infusion cannula and being placed in the subcutaneous tissue; c) an impedance measuring unit, the impedance measuring unit being operatively coupled to the at least two electrodes and configured to measure at least one impedance value between the at least two electrodes, a variation of the at least one impedance value reflecting a displacement of interstitial fluid by drug upon drug administration; d) an event trigger unit operatively coupled to the impedance measuring unit and being configured to evaluate the at least one impedance value and to generate an event trigger if evaluation of the at least one impedance value indicates the occurrence of an administration anomaly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for administration supervision in an ambulatory infusion device for subcutaneous drug infusion over an extended time period, comprising the steps of:
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a) measuring by an impedance measuring unit at least one impedance value between at least two subcutaneous electrodes, the at least two subcutaneous electrodes being comprised by an infusion cannula, a variation of the at least one impedance value reflecting a displacement of interstitial fluid by drug upon drug administration; b) generating by an event trigger unit an event trigger if an evaluation of the at least one impedance value indicates the occurrence of an administration anomaly. - View Dependent Claims (13, 14, 15)
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Specification