Test–retest reliability of skeletal muscle oxygenation measurements during submaximal cycling exercise in patients with chronic heart failure

Niemeijer, Victor M.; Spee, Ruud F.; Jansen, Jasper P.; Buskermolen, Antonetta B.C.; Dijk, T. van; Wijn, Pff Pieter; Kemps, Hareld

doi:10.1111/cpf.12269

Cited by 29 publications

(48 citation statements)

References 37 publications

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“…Previous CV of various NIRS monitors report resting TSI of the vastus lateralis between 2.3% and 5.8%. 25,[35][36][37] These baseline TSI values are similar to that observed in the MOXY devices in our study (5.7% to 6.2%). Interestingly, the present CV for the PortaMon devices is lower than that previously reported 1.8% to 2.5% versus 4.7%.…”

Section: Test-retest Reliability Of Devices At Restsupporting

confidence: 89%

“…Interestingly, the present CV for the PortaMon devices is lower than that previously reported 1.8% to 2.5% versus 4.7%. 25 However, this variation may be due to differences in the precise anatomical location the device is placed, leg position (supine versus seated), gender (male versus male and female), and health status of the participants (healthy versus chronic heart failure).…”

Section: Test-retest Reliability Of Devices At Restmentioning

confidence: 99%

“…1,3 Recently, a new low-cost SR-based device, the MOXY monitor, has been marketed to athletes as a training tool to inform the user of exercise intensity. 10,24 The PortaMon, a widely used, portable, SRS oximeter has previously demonstrated a high level of reliability at rest 25 and during isotonic, multijoint resistance exercise. 26 Conversely, no studies investigating the test-retest reliability of the MOXY device have been conducted.…”

Section: Introductionmentioning

confidence: 99%

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Performance comparison of the MOXY and PortaMon near-infrared spectroscopy muscle oximeters at rest and during exercise

2018

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Abstract. The purpose of the study was to compare muscle oxygenation as measured by two portable, wireless near-infrared spectroscopy (NIRS) devices under resting and dynamic conditions. A recently developed low-cost NIRS device (MOXY) was compared against an established PortaMon system that makes use of the spatially resolved spectroscopy algorithm. The influence of increasing external pressure on tissue oxygen saturation index (TSI) indicated that both devices are stable between 2 and 20 mmHg. However, above this pressure, MOXY reports declining TSI values. Analysis of adipose tissue thickness (ATT) and TSI shows a significant, nonlinear difference between devices at rest. The devices report similar TSI (%) values at a low ATT (<7 mm) (PortaMon minus MOXY difference is þ1.1 AE 2.8%) with the major subsequent change between the devices occurring between 7 and 10 mm; at ATT values >10 mm the difference remains constant (−14.7 AE 2.8%). The most likely explanation for this difference is the small source-detector separation (2.5 cm) in the MOXY resulting in lower tissue penetration into muscle in subjects with higher ATT. Interday test-retest reliability of resting TSI was evaluated on five separate occasions, with the PortaMon reporting a lower coefficient of variation (1.8% to 2.5% versus 5.7% to 6.2%). In studies on male subjects with low ATT, decreases in the TSI were strongly correlated during isometric exercise, arterial occlusion, and incremental arm crank exercise. However, the MOXY reports a greater dynamic range, particularly during ischemia induced by isometric contraction or occlusion (Δ74.3% versus Δ43.7%; hyperemia MAX-occlusion MIN). This study shows that in this subject group both MOXY and PortaMon produce physiologically credible TSI measures during rest and exercise. However, the absolute values obtained during exercise are generally not comparable between devices unless corrected by physiological calibration following an arterial occlusion. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Section: Test-retest Reliability Of Devices At Restsupporting

confidence: 89%

Section: Test-retest Reliability Of Devices At Restmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance comparison of the MOXY and PortaMon near-infrared spectroscopy muscle oximeters at rest and during exercise

2018

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“…As such, it is not known whether reported changes are of physiological significance or due to variability with the data collection methods. Previously, reliability studies assessing muscle oxygenation have been limited to laboratory conditions and/or using frequency domain spectroscopy (5,21,24,26). There is no known study which has aimed to determine reliability within an ecologically valid setting.…”

Section: Introductionmentioning

confidence: 99%

Reliability of Near-Infrared Spectroscopy for Measuring Intermittent Handgrip Contractions in Sport Climbers

Baláš¹,

Kodejška²,

Krupková³

et al. 2018

Journal of Strength and Conditioning Research

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Baláš, J, Kodejška, J, Krupková, D, Hannsmann, J, and Fryer, S. Reliability of near-infrared spectroscopy for measuring intermittent handgrip contractions in sport climbers. J Strength Cond Res 32(2): 494-501, 2018-The use of near-infrared spectroscopy (NIRS) to investigate muscle oxygenation changes during physical tasks such as rock climbing has rapidly increased within recent years; yet, there is no known measure of reliability. The current study aimed to determine intersession reliability and minimal detectable change (MDC) of continuous wave NIRS parameters during intermittent handgrip contractions in rock climbers. Thirty-two sport climbers were tested for exhaustive intermittent handgrip exercise (8-second contraction-2-second relief) at 60% of maximal voluntary contraction on 3 separate days. During each visit, continuous wave NIRS was used to determine tissue saturation index (TSI) as the measure of tissue oxygenation in the flexor digitorum profundus. To assess the intersession reliability, the intraclass correlation coefficient (ICC), SEM, coefficient of variation (CV), and MDC were used. Mean deoxygenation during the contractions provided reliable results ([INCREMENT] TSI; first trial -8.9 ± 2.9%, second trial -8.8 ± 2.7%, and third trial -8.4 ± 2.6%; ICC = 0.692; SEM = 1.5%; CV = 17.2%; MDC = 4.2%). Mean muscle reoxygenation during the relief periods was similarly reliable ([INCREMENT] TSI; first trial 9.0 ± 3.1%, second trial 8.8 ± 2.9%, and third trial 8.5 ± 2.7%; ICC = 0.672; SEM = 1.7%; CV = 19.0%, MDC = 4.7%). As such, continuous wave NIRS provides a reliable measure of deoxygenation and reoxygenation during intermittent contractions to failure in the forearm flexors of rock climbers. Differences exceeding ∼4.5% for [INCREMENT] TSI during contraction and relief periods should be considered meaningful.

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“…A graph of the NIRS signal (optical density, OD) was plotted against time (calculated using the frequency of data collection). The measurement was recorded from the third channel of the NIRS signal; this was done to avoid the influence of adipose tissue thickness at the shallow channel [18]. OD was recorded at different points of oxygen consumption.…”

Section: Discussionmentioning

confidence: 99%

Interpretation of Near-Infrared Spectroscopy (NIRS) Signals in Skeletal Muscle

Sanni

McCully

2019

JFMK

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Near-infrared spectroscopy (NIRS) uses the relative absorption of light at 850 and 760 nm to determine skeletal muscle oxygen saturation. Previous studies have used the ratio of both signals to report muscle oxygen saturation. Purpose: The purpose of this pilot study is to assess the different approaches used to represent muscle oxygen saturation and to evaluate the pulsations of oxygenated hemoglobin/myoglobin (O2heme) and deoxygenated hemoglobin/myoglobin (Heme) signals. Method: Twelve participants, aged 20–29 years, were tested on the forearm flexor muscles using continuous-wave NIRS at rest. Measurements were taken during 2–3 min rest, physiological calibration (5 min ischemia), and reperfusion. Ten participants were included in the study analysis. Results: There was a significant difference in pulse size between O2heme and Heme signals at the three locations (p < 0.05). Resting oxygen saturation was 58.8% + 9.2%, 69.6% + 3.9%, and 89.2% + 6.9% when calibrated using O2heme, the tissue oxygenation/saturation index (TSI), and Heme, respectively. Conclusion: The difference in magnitude of O2heme and Heme pulses with each heartbeat might suggest different anatomical locations of these signals, for which calibrating with just one of the signals instead of the ratio of both is proposed. Calculations of physiological calibration must account for increased blood volume in the tissue because of the changes in blood volume, which appear to be primarily from the O2heme signal. Resting oxygen levels calibrated with Heme agree with theoretical oxygen saturation.

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Test–retest reliability of skeletal muscle oxygenation measurements during submaximal cycling exercise in patients with chronic heart failure

Cited by 29 publications

References 37 publications

Performance comparison of the MOXY and PortaMon near-infrared spectroscopy muscle oximeters at rest and during exercise

Performance comparison of the MOXY and PortaMon near-infrared spectroscopy muscle oximeters at rest and during exercise

Reliability of Near-Infrared Spectroscopy for Measuring Intermittent Handgrip Contractions in Sport Climbers

Interpretation of Near-Infrared Spectroscopy (NIRS) Signals in Skeletal Muscle

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