US6990849B2
Expired / Lapsed
US
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Microfluidic analytical system with position electrodes
Assignee: Cilag GmbH International
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Filing: 2004-03-26
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Granted: 2006-01-31
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Expires: 2024-03-26
Abstract
Abstract A microfluidic analytical system for monitoring an analyte (for example, glucose) in a liquid sample (e.g., ISF) includes an analysis module with at least one micro-channel for receiving and transporting a liquid sample, at least one analyte sensor for measuring an analyte in the liquid sample and at least one position electrode. The analyte sensor(s) and position electrode(s) are in operative communication with the micro-channel. The microfluidic system also includes a meter configured for measuring an electrical characteristic (such as impedance or resistance) of the position electrode(s). Moreover, the measured electrical characteristic is dependent on the position of the liquid sample in the micro-channel that is in operative communication with the position electrode for which an electrical characteristic is measured.
Inventors
- 👤 Sebastian Bohm
- 👤 James Iain Rodgers
- 👤 Alan McNeilage
- 👤 James Moffat
- 👤 Matthias Stiene
- 👤 Tanja Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:56
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/327; G01N27/3271; F; F03; F03B; F03B17/00; F03B17/06; F03B17/062; A; A61; A61B; A61B5/00; A61B5/145; A61B5/14532; B; B01; B01L; B01L3/00; B01L3/50; B01L3/502; B01L3/5027; B01L3/502715; F03B11/00; F03B11/002; G01F; G01F1/00; G01F1/704; G01F1/708; G01F22/00; B01L2200/00; B01L2200/14; B01L2200/143; B01L2300/00; B01L2300/06; B01L2300/0627; B01L2300/0645; B01L2300/08; B01L2300/0803; B01L2300/0806; B01L2300/0809; B01L2300/0816; B01L2400/00; B01L2400/04; B01L2400/0403; B01L2400/0409; F05; F05B; F05B2220/00; F05B2220/30; F05B2220/32; F05B2220/70; F05B2220/706; F05B2260/00; F05B2260/42; Y; Y02; Y02E; Y02E10/00; Y02E10/20
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
130 words
A microfluidic analytical system for monitoring an analyte in a liquid sample, the microfluidic analytical system comprising: an analysis module including at least one micro-channel for receiving and transporting a liquid sample; at least one analyte sensor for measuring an analyte in the liquid sample, each of the at least one analyte sensors being in operative communication with a micro-channel; and at least one position electrode, each of the at least one position electrodes in operative communication with at least one micro-channel; and a meter configured for measuring an electrical characteristic of the at least one position electrode, the electrical characteristic being dependent on a position of the liquid sample in the micro-channel in operative communication with the at least one position electrode for which an electrical characteristic is measured.
Claim 2
Dependent Claim
130 words
A microfluidic analytical system for monitoring an analyte in a liquid sample, the microfluidic analytical system comprising: an analysis module including at least one micro-channel for receiving and transporting a liquid sample; at least one analyte sensor for measuring an analyte in the liquid sample, each of the at least one analyte sensors being in operative communication with a micro-channel; and at least one position electrode, each of the at least one position electrodes in operative communication with at least one micro-channel; and a meter configured for measuring an electrical characteristic of the at least one position electrode, the electrical characteristic being dependent on a position of the liquid sample in the micro-channel in operative communication with the at least one position electrode for which an electrical characteristic is measured.
Claim 3
Dependent Claim
17 words
The microfluidic analytical system of claim 1 further including a timer in operative communication with the meter.
Claim 4
Dependent Claim
32 words
The microfluidic analytical system of claim 1 , wherein the position electrode is in operative communication with the micro-channel such that a surface of the position electrode is exposed to the micro-channel.
Claim 5
Dependent Claim
31 words
The microfluidic analytical system of claim 1 , wherein the position electrode is in operative communication with the micro-channel such that an insulating layer separates the position electrode from the micro-channel.
Claim 6
Dependent Claim
58 words
The microfluidic analytical system of claim 1 , wherein the at least one position electrode includes a first position electrode and a second position electrode with the first and second position electrodes in operative communication with a first micro-channel; and wherein the meter is configured for measuring an electrical characteristic between the first and the second position electrode.
Claim 7
Dependent Claim
24 words
The microfluidic analytical system of claim 5 , wherein the analyte sensor is disposed between the first position electrode and a second position electrode.
Claim 8
Dependent Claim
24 words
The microfluidic analytical system of claim 5 , wherein the first position electrode and the second position electrode are downstream of the analyte sensor.
Claim 9
Dependent Claim
36 words
The microfluidic analytical system of claim 5 , wherein the electrical characteristic is at least one of an impedance between the first and second position electrodes and a resistance between the first and second position electrodes.
Claim 10
Dependent Claim
23 words
The microfluidic analytical system of claim 1 , wherein the at least one position electrode is in operative communication with the analyte sensor.
Claim 11
Dependent Claim
42 words
The microfluidic analytical system of claim 5 further including a third position electrode in operative communication with the first micro-channel and wherein the meter is configured for measuring an electrical characteristic between any two of the first, second and third position electrodes.
Claim 12
Dependent Claim
27 words
The microfluidic analytical system of claim 1 , wherein the micro-channel includes at least one main micro-channel and at least a first and a second branching micro-channel.
Claim 13
Dependent Claim
75 words
The microfluidic analytical system of claim 11 , wherein the at least one position electrode includes at least one position electrode in the main micro-channel, at least one position electrode in the first branching micro-channel and at least one position electrode in the second branching micro-channels and wherein the meter measures an electrical characteristic between the position electrode in the main micro-channel and either of the position electrodes in the first and second branching micro-channels.
Claim 14
Dependent Claim
67 words
The microfluidic analytical system of claim 11 , wherein the at least one position electrode includes at least two position electrodes in the first branching micro-channel and at least two position electrodes in the second branching micro-channels and wherein the meter measures an electrical characteristic between either of the two position electrodes in the first branching micro-channel and the two position electrodes in the second branching micro-channel.
Claim 15
Dependent Claim
27 words
The microfluidic analytical system of claim 11 , wherein the at least one position electrode includes a first and second position electrode configured in an interdigitated configuration.
Claim 16
Dependent Claim
20 words
The microfluidic analytical system of claim 11 , wherein the at least one position electrode is a serpentine position electrode.
Claim 17
Dependent Claim
12 words
The microfluidic analytical system if claim 1 further including a bypass electrode.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2009-01-30 | 2009-08-01 | 2010-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2013-01-30 | 2013-08-01 | 2014-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2017-01-30 | 2017-08-01 | 2018-01-31 | $7700.00 | Window Closed / Lapsed |