Intra- and Inter-Day Reliability of the NIRS Portamon Device after Three Induced Muscle Ischemias

• Published in: Sensors (Basel, Switzerland) Vol. 22; no. 14; p. 5165
• Main Authors: Desanlis, Julien, Gordon, Dan, Calveyrac, Camille, Cottin, François, Gernigon, Marie
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01-07-2022; MDPI
• Subjects: arterial occlusion; blood flow restriction; Blood pressure; Body fat; Coefficient of variation; Confidence intervals; Correlation coefficients; Error analysis; Exercise; Hemoglobin; Human health and pathology; hyperemia; Infrared spectra; ischemic preconditioning; Life Sciences; Muscles; Musculoskeletal system; Near infrared radiation; Occlusion; Oxygenation; Physical fitness; Reliability analysis; Software; Spectrum analysis; Standard error; test–retest; Tissues and Organs; Veins & arteries; France
• ISSN: 1424-8220; 1424-8220
• DOI: 10.3390/s22145165

(1) Background: Near-infrared spectroscopy (NIRS) is an innovative and non-invasive technology used to investigate muscular oxygenation. The aim of this study is to assess the within- and between-session reliability of the NIRS Portamon (Artinis, Elst, Netherlands) device following three sets of induced muscle ischemia. (2) Methods: Depending on the experimental group (G1, G2 or G3), a cuff was inflated three times on the left upper arm to 50 mmHg (G1), systolic blood pressure (SBP) + 50 mmHg (G2) or 250 mmHg (G3). Maximum, minimum and reoxygenation rate values were assessed after each occlusion phase, using a Portamon device placed on the left brachioradialis. Reliability was assessed with intraclass correlation coefficient (ICC) value and ICC 95% confidence interval (CI-95%), coefficient of variation (CV) and standard error of measurement (SEM) (3) Results: Our results showed a good to excellent reliability for maximums and minimums within-session. However, the reoxygenation rate within sessions as well as measurements between sessions cannot predominantly show good reliability. (4) Conclusions: Multiple measurements of maximums and minimums within a single session appeared to be reliable which shows that only one measurement is necessary to assess these parameters. However, it is necessary to be cautious with a comparison of maximum, minimum and reoxygenation rate values between sessions.