Johan Hogstrand and Johan Rogestedt

Title of thesis:
 Non-invasive lactate estimation - An investigation of a spectroscopic approach
Master program: Systems, Control and Mechatronics

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To monitor the accumulation of lactate in the blood during physical activity is a key concept for athletes in all endurance sports. This thesis has attempted to identify and develop a method which does not need any blood to estimate lactate, i.e. a non-invasive method. In particular, transmission of light through a fingertip and the absorption thereof has been related to lactate concentration. A concept based on this idea has been developed, ranging from an initial theoretical and clinical study to system development and infield validation of a constructed device. The results indicate some promising wavelength regions, however highlights the difficulty to overcome noise and signal attenuation. The developed system performs lactate estimation with a RMSE of 1.63 for lactate concentrations of 1-9 mmol/L using support vector regression. In conclusion, the thesis has developed a complete framework for non-invasive lactate estimation. The performance, however, is unsatisfactory relative conventional, invasive, lactate meters. Many areas of future development have been suggested, building on the developed concept.
Supervisor: Magnus Karlsteen  
Examiner: Magnus Karlsteen
Opponent: Josip Kir Hromatko och Niklas Forsström ​
Category Student project presentation
Location: Online via Zoom
Starts: 14 December, 2020, 10:00
Ends: 14 December, 2020, 11:00

Page manager Published: Thu 10 Dec 2020.