Near infrared spectroscopy for evaluation of skeletal muscle tissue oxygenation in different types of shock

Over the past 15 years the use of near infrared spectroscopy in exercise and sports science has increased exponentially. The majority of these studies have used this noninvasive technique to provide information related to tissue metabolism during acute exercise. This has been undertaken to determine its utility as a suitable tool to provide new insights into the heterogeneity and regulation of local tissue metabolism, both in cerebral and skeletal muscle tissue. In the accompanying articles in this symposium, issues related to the principles, techniques, limitations (Ferrari et al., 2004), and reliability and validity of NIRS in both cerebral and skeletal muscle tissue (Bhambhani, 2004), mostly during acute exercise, have been addressed and will not be discussed here. Instead, the present paper will focus specifically on the application of NIRS to exercise sports science, with an emphasis on how this technology has been applied to exercise training and sport, and how it can be used to design training programs for athletes. Key words: tissue de-oxygenation, hemoglobin volume, endurance training, resistance exercise, taper, applied physiology

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Near-Infrared Spectroscopy for Monitoring of Tissue Oxygenation of Exercising Skeletal Muscle in a Chronic Compartment Syndrome Model*

The Journal of Bone and Joint Surgery (American) ◽

10.2106/00004623-199706000-00006 ◽

1997 ◽

Vol 79 (6) ◽

pp. 838-43 ◽

Cited By ~ 67

Author(s):

GREGORY A. BREIT ◽

JEFFREY H. GROSS ◽

DONALD E. WATENPAUGH ◽

BRITTON CHANCE ◽

ALAN R. HARGENS

Keyword(s):

Skeletal Muscle ◽

Infrared Spectroscopy ◽

Compartment Syndrome ◽

Near Infrared Spectroscopy ◽

Near Infrared ◽

Tissue Oxygenation ◽

Chronic Compartment Syndrome

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Changes in Hemodynamics and Tissue Oxygenation Saturation in the Brain and Skeletal Muscle Induced by Speech Therapy – A Near-Infrared Spectroscopy Study

The Scientific World JOURNAL ◽

10.1100/tsw.2011.116 ◽

2011 ◽

Vol 11 ◽

pp. 1206-1215 ◽

Cited By ~ 11

Author(s):

U. Wolf ◽

F. Scholkmann ◽

R. Rosenberger ◽

M. Wolf ◽

M. Nelle

Keyword(s):

Infrared Spectroscopy ◽

Near Infrared Spectroscopy ◽

Speech Therapy ◽

Near Infrared ◽

Tissue Oxygenation ◽

Spectral Power ◽

Different Types ◽

Concentration Changes ◽

Leg Muscle ◽

The Brain

Arts speech therapy (AST) is a therapeutic method within complementary medicine and has been practiced for decades for various medical conditions. It comprises listening and the recitation of different forms of speech exercises under the guidance of a licensed speech therapist. The aim of our study was to noninvasively investigate whether different types of recitation influence hemodynamics and oxygenation in the brain and skeletal leg muscle using near-infrared spectroscopy (NIRS). Seventeen healthy volunteers (eight men and nine women, mean age ± standard deviation 35.6 ± 12.7 years) were enrolled in the study. Each subject was measured three times on different days with the different types of recitation: hexameter, alliteration, and prose verse. Before, during, and after recitation, relative concentration changes of oxyhemoglobin (Δ[O2Hb]), deoxyhemoglobin (Δ[HHb]), total hemoglobin (Δ[tHb]), and tissue oxygenation saturation (StO2) were measured in the brain and skeletal leg muscle using a NIRS device. The study was performed with a randomized crossover design. Significant concentration changes were found during recitation of all verses, with mainly a decrease in Δ[O2Hb] and ΔStO2in the brain, and an increase in Δ[O2Hb] and Δ[tHb] in the leg muscle during recitation. After the recitations, significant changes were mainly increases of Δ[HHb] and Δ[tHb] in the calf muscle. The Mayer wave spectral power (MWP) was also significantly affected, i.e., mainly the MWP of the Δ[O2Hb] and Δ[tHb] increased in the brain during recitation of hexameter and prose verse. The changes in MWP were also significantly different between hexameter and alliteration, and hexameter and prose. Possible physiological explanations for these changes are discussed. A probable reason is a different effect of recitations on the sympathetic nervous system. In conclusion, these changes show that AST has relevant effects on the hemodynamics and oxygenation of the brain and muscle.

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