摘要:
A method for detecting an interferent contribution in a biosensor, wherein the biosensor has a first electrode (112), a second electrode, and a third electrode (114), wherein the first electrode (112) and the second electrode are covered by a membrane, wherein the first electrode (112) further includes an enzyme or wherein the first electrode (112) is covered by an enzyme layer. Further, the first electrode (112), the second electrode, and the third electrode (114) are connected via a potentiostat, wherein, in a normal operational mode, via the potentiostat an electrical potential difference is applied between the first electrode (112) and the second electrode in a manner that the first electrode (112) allows for oxidative processes and the third electrode (114) allows for reductive processes. The method comprises the steps of: a) switching from the normal operational mode to an interferent detection mode, wherein, in the interferent detection mode, the electrical potential difference between the first electrode (112) and the second electrode is altered for a limited period of time in a manner that the third electrode (114) allows for oxidative processes; b) measuring a current-voltage characteristic (110) of the third electrode (114); and c) determining the interferent contribution in the biosensor by evaluating the current-voltage characteristic (110) of the third electrode (114). The method allows deducting the presence and, preferably, the amount of the interferent in an unambiguous way and is, generally, applicable in case of more than one kind of interferent. Neither additional working electrodes nor supplementary circuit components are required. The method is implementable within sensor electronics architectures of standard biosensors and, thus, applicable in already existing biosensor systems.
摘要:
A method for determining a reliability of an analyte sensor (110) is proposed. The analyte sensor (110) is an in vivo sensor. The method comprises the steps: a) measuring at least one first temperature dependent signal; b) measuring at least one second temperature dependent signal which is different from the first temperature dependent signal and which is related to a current flow in the analyte sensor (110); c) correlating the first temperature dependent signal and the second temperature dependent signal for determining the reliability of the analyte sensor (110).
摘要:
A method (110) is disclosed. The method (110) comprises the steps of: a) receiving a measured analyte value (114) from a biosensor (116), wherein the biosensor (116) is adapted for measuring the analyte values (114), and wherein the biosensor (116) is comprised in a continuous monitoring system (118) or controlled by the continuous monitoring system (118); b) determining at least two impact parameters (136), wherein each of the impact parameters (136) is influenced by an operational status of the continuous monitoring system (118), and wherein each of the impact parameters (136) is capable of exerting an influence (138) on a signal quality of the biosensor (116), wherein the influence of each of the impact parameters (136) on the signal quality of the biosensor (116) is expressed by a weight (144) being assigned to each of the impact parameters (136); and c) determining the signal quality degree (112) associated with the measured analyte value (114) by combining the weights (144) and the corresponding impact parameters (136); and providing the signal quality degree (112) associated with the analyte value (114), wherein the amount of insulin (150) is determined from at least one data pair (146), wherein the data pair (146) comprises the measured analyte value (114) from the biosensor (116) and the signal quality degree (112) associated with the measured analyte value (114), wherein in an event in which the signal quality degree (112) falls below a first predefined quality threshold, an alarm is suppressed and activated after the signal quality degree (112) meets a second predefined quality threshold, wherein the second predefined quality threshold is higher or lower compared to the first predefined quality threshold, or wherein, in an event in which the signal quality degree (112) falls below a predefined quality threshold, an alarm is antedated.
摘要:
A method (110) is disclosed. The method (110) comprises the steps of: a) receiving a measured analyte value (114) from a biosensor (116), wherein the biosensor (116) is adapted for measuring the analyte values (114), and wherein the biosensor (116) is comprised in a continuous monitoring system (118) or controlled by the continuous monitoring system (118); b) determining at least two impact parameters (136), wherein each of the impact parameters (136) is influenced by an operational status of the continuous monitoring system (118), and wherein each of the impact parameters (136) is capable of exerting an influence (138) on a signal quality of the biosensor (116), wherein the influence of each of the impact parameters (136) on the signal quality of the biosensor (116) is expressed by a weight (144) being assigned to each of the impact parameters (136); and c) determining the signal quality degree (112) associated with the measured analyte value (114) by combining the weights (144) and the corresponding impact parameters (136); and providing the signal quality degree (112) associated with the analyte value (114), wherein the amount of insulin (150) is determined from at least one data pair (146), wherein the data pair (146) comprises the measured analyte value (114) from the biosensor (116) and the signal quality degree (112) associated with the measured analyte value (114), wherein in an event in which the signal quality degree (112) falls below a first predefined quality threshold, an alarm is suppressed and activated after the signal quality degree (112) meets a second predefined quality threshold, wherein the second predefined quality threshold is higher or lower compared to the first predefined quality threshold, or wherein, in an event in which the signal quality degree (112) falls below a predefined quality threshold, an alarm is antedated.
摘要:
The invention relates to a method (100) for predicting blood glucose levels, in particular for postprandial blood glucose level prediction, the method being computer-implemented and comprising: receiving (101) a first medical data set of a patient covering a time range, said first medical data set comprising glucose data and further other medical data of said patient, extracting (102) a second medical data set from said first medical data set, wherein the second medical data set is a subset of the first medical data set and wherein the extracting comprises at least one of: identifying (103) duplicates in the first medical data set and removing identified duplicates, identifying (104) data values that lie above a predefined maximum threshold data value or identifying (105) data values that lie below a predefined minimum threshold data value and removing data associated to said identified data values, identifying (106) data values that differ from predetermined expected data values by more than a predetermined amount and removing data associated to said identified data values, identifying (107) incomplete data for which data values are missing and removing identified incomplete data, identifying (108) at least one predetermined time-dependent data pattern and removing data associated to said identified time-dependent data pattern, providing (109) the extracted second medical data set as input to a blood glucose level prediction model, and predicting (110) future blood glucose levels of the patient using the output of the blood glucose level prediction model based on the second medical data set.
摘要:
A method for detecting an analyte in a body fluid is disclosed. The method has the following steps: a) applying a sample (122) of the body fluid to a test element (120), said test element (120) comprising at least (i) a test field (128) comprising at least one test material (130) adapted to change at least one measurable property in the presence of the analyte, (ii) a capillary element (126) adapted to guide the sample (122) across said test field (128) in a flow direction (146), (iii) a first and a second measurement location (158, 160) within said test field (128), wherein the second measurement location (160) is offset from the first measurement location (158) in the flow direction (146);
b) measuring the measurable property in said at least one first measurement location (158), thereby generating at least one first measurement value; c) measuring the measurable property in said at least one second measurement location (160), thereby generating at least one second measurement value; d) detecting the analyte by using an evaluation algorithm having at least two input variables, wherein (i) at least one first input variable of the at least two input variables includes an information on a difference between the first measurement value and the second measurement value, and (ii) at least one second input variable of the at least two input variables includes a measurement information on an analyte-induced change of the measurable property of the test material (130) in at least part of the test field (128).