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- W2807176093 abstract "PURPOSE: The primary aim of this study was to compare frequency-domain multi-distance (FDMD) Near-Infrared Spectroscopy (NIRS) derived total heme concentration (hemoglobin + myoglobin) to the total heme derived during a chemical assay. The secondary aim of this study was to explore the influence of adipose tissue thickness on NIRS measurements of mammalian muscle. We hypothesized that the total heme measured by the FDMD NIRS would not be significantly different from the assay values. METHODS: Five swine were transported to the Kansas State University Meats Laboratory for harvest under federal inspection. Carcass measurements were taken on the same day as harvest. Immediately post draining of the carcass the NIRS probe was placed along the belly of the deltoideus (DT), triceps brachii lateral head (TLH), tensor fasciae latae (TFL), longissimus dorsi (LD), biceps femoris (BF), and semitendinosus (ST) muscles and a measurement was taken for 1 min. The position of the probe was marked to accurately assess the same region of exposed muscle after processing. After the carcass was processed the muscles were exposed (removal of the skin and adipose tissue layer). The NIRS probe was placed on the exposed muscle and data was collected for 1 min. The muscles were then excised for chemical analysis. RESULTS: The NIRS total heme signal with the skin intact was significantly less than the assay derived total heme (p<0.05). The NIRS total heme signal during the direct muscle condition was not significantly different from the assay derived total heme for BF, DT, ST, TFL, and TL (p>0.05), but was significantly less than the assay derived total heme for the LL muscle group (p=0.012). The NIRS total heme signal directly on the muscle was significantly correlated with the assay derived total heme concentration (r2=0.56, p<0.0001). The NIRS total heme signal was significantly less for the intact skin compared to direct muscle conditions for BF, DT, ST, TFL, and TL (p<0.05), but not for the LL (p=0.922). CONCLUSIONS: The similar total heme derived between the assay and the FDMD NIRS (during direct muscle measurements) indicates that the NIRS provides an accurate quantification of the total heme in the muscles, including myoglobin. However, when skin and adipose tissue are intact the signal is attenuated and should be taken into consideration." @default.
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- W2807176093 date "2018-05-01" @default.
- W2807176093 modified "2023-09-26" @default.
- W2807176093 title "Near-Infrared Spectroscopy Derived Total Heme vs. Assay Derived Total Heme" @default.
- W2807176093 doi "https://doi.org/10.1249/01.mss.0000536485.63161.3a" @default.
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