Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. Different options for blood glucose monitoring in clinical chemistry using IR-spectroscopy.

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Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. Different options for blood glucose monitoring in clinical chemistry using IR-spectroscopy. Figure Legend: From: Bedside monitoring of subcutaneous interstitial glucose in healthy individuals using microdialysis and infrared spectrometry J. Biomed. Opt. 2007;12(2): doi: /

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. Schematics of the computer-controlled bedside instrumentation for continuous glucose monitoring including a Fourier transform IR minispectrometer, a microdialysis probe, and programmable microfluidics. Figure Legend: From: Bedside monitoring of subcutaneous interstitial glucose in healthy individuals using microdialysis and infrared spectrometry J. Biomed. Opt. 2007;12(2): doi: /

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. (A) Spectral intensities with the water-filled microcell (upper trace) and including an optical low-pass filter (lower trace); (B) spectral dialysate components illustrating possible cross-sensitivities. Figure Legend: From: Bedside monitoring of subcutaneous interstitial glucose in healthy individuals using microdialysis and infrared spectrometry J. Biomed. Opt. 2007;12(2): doi: /

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. (A) Mean dialysate spectra of two test persons including the absorbance noise level; for clarity, the dialysate spectra are presented with an offset; (B) PCA loading spectra obtained from a PCA of absorbance baseline spectra calculated from neighboring single- beam spectra of the water-filled cell during the measurement campaign with the first three subjects (lower traces); difference spectrum between single-beam spectra of the water-filled cell at the end and the beginning of the campaign and absorbance spectrum of a dry CaF2 window after the campaign and cell disassembly (upper traces). Figure Legend: From: Bedside monitoring of subcutaneous interstitial glucose in healthy individuals using microdialysis and infrared spectrometry J. Biomed. Opt. 2007;12(2): doi: /

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. Improvements in baseline stability by usage of an optical low-pass filter with cut-off at 2000cm−1: (A) absorbance base lines with a Ringer’s solution filled cell with normal spectrometer operation (see also text) and (B) variation of baselines with implementation of an optical low-pass filter. Figure Legend: From: Bedside monitoring of subcutaneous interstitial glucose in healthy individuals using microdialysis and infrared spectrometry J. Biomed. Opt. 2007;12(2): doi: /

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. (A) Experiments illustrating sample transport through the IR cuvette with variation of the sample loop filling volumes using an aqueous glucose sample (27.8mM) and Ringer’s solution for transport (IR measurement time 1min each), and (B) transport of the dialysate sample by different Ringer’s solution volumes and fluid dynamics in the IR cuvette after the pump stops (spectra were recorded for every 20s; sample transport pump rate of 40μL∕min and sample loop fill by 8.3μL of glucose solution). Figure Legend: From: Bedside monitoring of subcutaneous interstitial glucose in healthy individuals using microdialysis and infrared spectrometry J. Biomed. Opt. 2007;12(2): doi: /

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. (A) Dialysate and aqueous solution spectra obtained within in vitro recovery rate experiments using CMA60 micro-dialysis catheters and (B) relationship between glucose recovery and acetate loss rates with results from collected dialysates using microdialysis of glucose solutions and blood plasma samples; glucose concentrations were 10, 11.11, and 15.28mM in aqueous, plasma, and spiked plasma, respectively. Figure Legend: From: Bedside monitoring of subcutaneous interstitial glucose in healthy individuals using microdialysis and infrared spectrometry J. Biomed. Opt. 2007;12(2): doi: /

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. (A) Oral glucose tolerance tests with three healthy volunteers showing the time course of concentrations in sampled dialysates from microdialysis probes inserted into the subcutaneous adipose tissue and predicted IR sensor values based on PLS calibrations and (B) comparison of blood and dialysate glucose concentrations taking into account a constant microdialysis recovery rate (one-point calibration using the first available dialysate concentration values in comparison to glucose in blood plasma). Figure Legend: From: Bedside monitoring of subcutaneous interstitial glucose in healthy individuals using microdialysis and infrared spectrometry J. Biomed. Opt. 2007;12(2): doi: /

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. (A) Time course of glucose concentrations in venous blood and dialysates from a microdialysis catheter, inserted into the subcutaneous adipose tissue of a healthy subject, calculated from a CLS calibration model including recovery correction (ELO-MEL perfusate flow rate was 1μl∕min) (an a posteriori adjustment of the time shift between venous blood sampling used for glucose concentration point-of-care measurements and the IR-sensor readings is used for presentation); and (B) glucose recovery rates estimated in parallel to glucose dialysate concentrations during the monitoring of interstitial concentrations by microdialysis. Figure Legend: From: Bedside monitoring of subcutaneous interstitial glucose in healthy individuals using microdialysis and infrared spectrometry J. Biomed. Opt. 2007;12(2): doi: /

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. CEG analysis of the IR CLS-predicted and recovery-corrected glucose concentration values versus venous blood glucose measurements with the lag time of IR sensor readings adjusted. Figure Legend: From: Bedside monitoring of subcutaneous interstitial glucose in healthy individuals using microdialysis and infrared spectrometry J. Biomed. Opt. 2007;12(2): doi: /