Method and a device for determining a body fluid glucose level of a patient, and a computer program product

A system for determining a body fluid glucose level of a patient from a continuous sensor signal of a glucose sensor element of a continuous body fluid glucose monitoring device, comprising:

• the continuous body fluid glucose monitoring device;
• and
• a data processing device spatially distinct from the continuous body fluid glucose monitoring device and having:
• a processor;
• and
• a storage medium having computer program instructions stored thereon, wherein the computer program instructions, when executed by the processor, perform processing of:
• receive a measurement data representing the continuous sensor signal of the glucose sensor element of the continuous body fluid glucose monitoring device,
• receive a time-dependent zero-signal level of the glucose sensor element, wherein the time-dependent zero-signal level of the glucose sensor element embodies a presence of an interferent in a body fluid for which the body fluid glucose level is determined and a kinetic course of decomposition of the interferent in the body fluid, wherein the interferent is a substance different from glucose and the glucose sensor element is responsive to the interferent in the body fluid, wherein the time-dependent zero-signal level is stored in the storage medium,
• receive a starting time of the presence of the interferent in the body fluid for which the body fluid glucose level is determined,
• determine the body fluid glucose level by processing at least the measurement data, the time-dependent zero-signal level, and the starting time, the processing comprising subtraction of the time-dependent zero-signal level from the continuous sensor signal according to the starting time, and
• provide the determined body fluid glucose level as result data.

A method for determining a body fluid glucose level of a patient, comprising:

• measuring, by a glucose sensor element of a continuous body fluid glucose monitoring device, a pre-processed glucose level and generating a measurement data representing the pre-processed glucose level,
• receiving, in a data processing unit, the measurement data,
• receiving, by the data processing unit, a calibration signal for the glucose sensor element, where the calibration signal embodies a presence of an interferent in a body fluid for which the body fluid glucose level is determined and a kinetic course of decomposition of the interferent in the body fluid, wherein the interferent is a substance different from glucose and the glucose sensor element is responsive to the interferent in the body fluid,
• receiving, by the data processing unit, a starting time of the presence of the interferent in the body fluid for which the body fluid glucose level is determined, and
• determining, by the data processing unit, the body fluid glucose level by processing at least the measurement data, the calibration signal, and the starting time, the processing comprising subtraction of the calibration signal from the measurement data according to the starting time, and providing the determined glucose level as result data.