Comparison between near-infrared oximetry and 99mTc-HMPAO uptake in the resting peripheral muscle under normobaric normoxia and hypobaric hypoxia

1998 ◽  
Author(s):  
Marco Pagani ◽  
Ralf Ansjon ◽  
Folke Lind ◽  
Cathrine Jonsson ◽  
Johan Uusijarvi ◽  
...  
Keyword(s):  
Hypobaric Hypoxia ◽  
Near Infrared ◽  
Peripheral Muscle ◽  
Normobaric Normoxia

scholarly journals The Various Oximetric Techniques Used for the Evaluation of Blood Oxygenation

Sensors ◽  
2020 ◽  
Vol 20 (17) ◽  
pp. 4844
Author(s):  
Meir Nitzan ◽  
Itamar Nitzan ◽  
Yoel Arieli
Keyword(s):  
Oxygen Saturation ◽  
Pulse Oximetry ◽  
Near Infrared ◽  
Light Transmission ◽  
Venous Blood ◽  
Blood Oxygenation ◽  
Infrared Light ◽  
Cerebral Tissue ◽  
Peripheral Muscle ◽  
Arterial Blood

Adequate oxygen delivery to a tissue depends on sufficient oxygen content in arterial blood and blood flow to the tissue. Oximetry is a technique for the assessment of blood oxygenation by measurements of light transmission through the blood, which is based on the different absorption spectra of oxygenated and deoxygenated hemoglobin. Oxygen saturation in arterial blood provides information on the adequacy of respiration and is routinely measured in clinical settings, utilizing pulse oximetry. Oxygen saturation, in venous blood (SvO2) and in the entire blood in a tissue (StO2), is related to the blood supply to the tissue, and several oximetric techniques have been developed for their assessment. SvO2 can be measured non-invasively in the fingers, making use of modified pulse oximetry, and in the retina, using the modified Beer–Lambert Law. StO2 is measured in peripheral muscle and cerebral tissue by means of various modes of near infrared spectroscopy (NIRS), utilizing the relative transparency of infrared light in muscle and cerebral tissue. The primary problem of oximetry is the discrimination between absorption by hemoglobin and scattering by tissue elements in the attenuation measurement, and the various techniques developed for isolating the absorption effect are presented in the current review, with their limitations.

P1796Adults with congenital heart disease have impaired calf muscle oxygenation compared to control subjects

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
C Sandberg ◽  
A G Crenshaw ◽  
G H Elcadi ◽  
C Christersson ◽  
J Hlebowicz ◽  
...  
Keyword(s):  
Congenital Heart Disease ◽  
Blood Flow ◽  
Heart Disease ◽  
Exercise Capacity ◽  
Congenital Heart ◽  
Near Infrared ◽  
Venous Occlusion ◽  
Calf Muscle ◽  
Muscle Oxygenation ◽  
Peripheral Muscle

Abstract Background Peripheral muscle factors are presumed to be important contributors to the reduced exercise capacity in congenital heart disease (CHD), but the mechanisms are poorly understood. Purpose To investigate if muscle oxygenation in the calf muscle is impaired in adults with complex CHD in comparison to controls. Method Seventy-four adults with complex CHD (35.6±14.3 years, females n=22) were recruited from centers specialized in adult CHD. Seventy-four age and gender matched subjects were recruited as controls. Muscle oxygenation was successfully determined using near-infrared spectroscopy on the medial portion of m. gastrocnemiusin 63 patients and 67 controls. Measurements were made at rest, during venous occlusion to estimate blood flow (BF – indicated by the slope increase of total haemoglobin, HbT), at the start of isotonic unilateral heel-lifts to exhaustion, and immediately after exercise. Results In comparison to controls, patients had a lower muscle saturation (StO2) at rest, albeit not statistically significant, (66±17% vs. 60±19%, p=0.07), and a lower BF (0.38±0.21 vs. 0.31±0.21 HbTx3.5sec–1, p=0.07). For exercise, compared to the controls, patients had a slower desaturation rate at exercise onset (−11.7±5.8% vs. −7.7±4.3%. StO2x3.5sec–1, p<0.001), and both a slower resaturation rate (6.1±3.8% vs. 3.9±3.7% StO2x3.5sec–1, p=0.002) and a slower half recovery time (16.8±11.1 vs. 28.6±21.2 sec, p<0.001) post exercise. Conclusion The lower muscle oxygenation and blood flow at rest, and the slower oxygenation kinetics during exercise may give insight to the mechanism for the reduced exercise capacity commonly found in adults with complex CHD. This finding may also provide implications for design of rehabilitation programs for these patients.

Peripheral Muscle Near-Infrared Spectroscopy Variables are Altered Early in Septic Shock

Shock ◽  
2018 ◽  
Vol 50 (1) ◽  
pp. 87-95 ◽  
Author(s):  
Diego Orbegozo ◽  
Fuhong Su ◽  
Keliang Xie ◽  
Lokmane Rahmania ◽  
Fabio Silvio Taccone ◽  
...  
Keyword(s):  
Septic Shock ◽  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Peripheral Muscle

scholarly journals Underwater near-infrared spectroscopy can measure training adaptations in adolescent swimmers

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4393 ◽  
Author(s):  
Ben Jones ◽  
Dave Parry ◽  
Chris E. Cooper
Keyword(s):  
Infrared Spectroscopy ◽  
Training Program ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Muscle Blood Flow ◽  
Muscle Oxygenation ◽  
Analysis Tool ◽  
Swim Performance ◽  
Performance Time ◽  
Peripheral Muscle

The development of an underwater near-infrared spectroscopy (uNIRS) device has enabled previously unattainable measurements of peripheral muscle hemodynamics and oxygenation to be taken within the natural aquatic environment. The purposes of this study were (i) to trial the use of uNIRS, in a real world training study, and (ii) to monitor the effects of a swim training program upon muscle oxygenation status in short distance swimming. A total of 14 junior club level swimmers completed a repeated swim sprint test before and after an eight week endurance training program. A waterproof, portable Near-Infrared Spectroscopy device was attached to the vastus lateralis. uNIRS successfully measured changes in muscle oxygenation and blood volume in all individuals; rapid sub-second time resolution of the device was able to demonstrate muscle oxygenation changes during the characteristic swim movements. Post training heart rate recovery and swim performance time were significantly improved. uNIRS data also showed significant changes. A larger rise in deoxyhemoglobin during individual sprints suggested training induced an increase in muscle oxygen extraction; a faster recovery time for muscle oxygenation suggested positive training induced changes and significant changes in muscle blood flow also occur. As a strong correlation was seen between an increased reoxygenation rate and an improved swim performance time, these findings support the use of uNIRS as a new performance analysis tool in swimming.

Peripheral Muscle Near-Infrared Spectroscopy in Neonates: Ready for Clinical Use? A Systematic Qualitative Review of the Literature

Neonatology ◽  
2015 ◽  
Vol 108 (4) ◽  
pp. 233-245 ◽  
Author(s):  
Nina Höller ◽  
Berndt Urlesberger ◽  
Lukas Mileder ◽  
Nariae Baik ◽  
Bernhard Schwaberger ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Clinical Use ◽  
Review Of The Literature ◽  
Qualitative Review ◽  
Peripheral Muscle

Training effects on peripheral muscle oxygenation and performance in children with congenital heart diseases

2012 ◽  
Vol 37 (4) ◽  
pp. 621-630 ◽  
Author(s):  
Wassim Moalla ◽  
Mohamed Elloumi ◽  
Karim Chamari ◽  
Grégory Dupont ◽  
Yves Maingourd ◽  
...  
Keyword(s):  
Congenital Heart ◽  
Near Infrared ◽  
Heart Diseases ◽  
Vastus Lateralis ◽  
Muscle Oxygenation ◽  
Knee Extensors ◽  
Control Group ◽  
Time To Exhaustion ◽  
Congenital Heart Diseases ◽  
Peripheral Muscle

We investigated the effect of training on peripheral muscular performance and oxygenation during exercise and recovery in children with congenital heart diseases (CHD). Eighteen patients with CHD aged 12 to 15 years were randomly assigned into either an individualized 12-week aerobic cycling training group (TG) or a control group (CG). Maximal voluntary contraction (MVC) and endurance at 50% MVC (time to exhaustion, Tlim) of the knee extensors were measured before and after training. During the 50% MVC exercise and recovery, near-infrared spectroscopy (NIRS) was used to assess the fall in muscle oxygenation, i.e., deoxygenation ([Formula: see text]) of the vastus lateralis, the mean rate of decrease in muscle oxygenation, the half time of recovery (T1/2R), and the recovery speed to maximal oxygenation (RS). There was no effect of time on any parameter in the CG. After training, significant improvements were observed in TG for MVC (101.6 ± 14.0 vs. 120.2 ± 19.4 N·m, p < 0.01) and Tlim (66.2 ± 22.6 vs. 86.0 ± 23.0 s, p< 0.01). Increased oxygenation (0.20 ± 0.13 vs. 0.15 ± 0.07 a.u., p < 0.01) and faster mean rate of decrease in muscle oxygenation were also shown after training in TG (1.22 ± 0.45 vs. 1.71 ± 0.78%·s–1, p < 0.001). Moreover, a shorter recovery time was observed in TG after training for T1/2R (27.2 ± 6.1 vs. 20.8 ± 4.2 s, p < 0.01) and RS (63.1 ± 18.4 vs. 50.3 ± 11.4 s, p < 0.01). A significant relationship between the change in [Formula: see text] and both MVC (r = 0.95, p < 0.001) and Tlim (r = 0.90, p < 0.001) in TG was observed. We concluded that exercise training improves peripheral muscular function by enhancing strength and endurance performance in children with CHD. This improvement was associated with increased oxygenation of peripheral muscles and faster recovery.

scholarly journals Acute effect of myofascial reorganization of the trapezius muscle in peripheral muscle oxygenation in asympomatic subjects – a case series

2020 ◽  
pp. 1-7
Author(s):  
Larissa Sinhorim ◽  
Mayane Amorim ◽  
Laureani Jaques Torres ◽  
Janaína Wagner ◽  
Nathália Tiepo Niza ◽  
...  
Keyword(s):  
Near Infrared ◽  
Soft Tissues ◽  
Saturation Index ◽  
Case Series ◽  
Trapezius Muscle ◽  
Muscle Oxygenation ◽  
Post Intervention ◽  
Peripheral Muscle ◽  
Comparison Results ◽  
Significant Difference

Background: Myofascial Reorganization (MFR) is a physiotherapy technique that mixes myofascial pressures and slips and has been used as a simple and non-invasive method that readjusts soft tissues, as well as myofascial adhesions and contractures that may cause decreased blood supply and consequently of physical activity. Objective: To verify if the MFR alters the tissue oxygenation of the trapezius muscle (TM) in subjects without the pain symptom in the evaluation day. Methods: The sample consisted of eight subjects with a mean age of 23 (± 6) years and a body mass index of 23.2 (±15.0) kg.m-2. Changes in muscle oxygenation were measured by near infrared spectroscopy (NIRS) (Portamon, Artinis, the Netherlands) in TM before and after 15 minutes of intervention. The proposed MFR protocol lasted approximately 10 minutes and consisted of pressures, stretching and myofascial slippage of the upper, middle and lower TM fibers. Data normality was performed using the Shapiro Wilk test and due to the parametric nature of the data, the paired t-test was used for pre and post intervention comparison. Results: There was a significant increase in the tissue saturation index (TSI) in the trapezius muscle (80.7±2.7% vs. 89.4±4.6%; p= 0.002) in the pre and post intervention comparison. The pre-post variation delta of oxyhemoglobin - O2 Hb (8.1±11.2 g/dL), deoxyhemoglobin - HHb (-0.72±1.6 g/dL) and total hemoglobin - tHB (7.4±12.3 g/dL) showed no significant difference. However, there was an increase in O2 Hb, tHB levels and a decrease in HHb. Conclusion: The findings showed that the MFR applied on trapezius muscle increased the TSI, which reflects on peripheral muscle oxygenation in subjects without pain in the day of evaluation.

scholarly journals Fetal Hemoglobin and Tissue Oxygenation Measured With Near-Infrared Spectroscopy—A Systematic Qualitative Review

2021 ◽  
Vol 9 ◽  
Author(s):  
Ena Pritišanac ◽  
Berndt Urlesberger ◽  
Bernhard Schwaberger ◽  
Gerhard Pichler
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Tissue Oxygenation ◽  
Fetal Hemoglobin ◽  
Cochrane Library ◽  
Term Neonates ◽  
Qualitative Review ◽  
Peripheral Muscle ◽  
The Impact

Fetal hemoglobin (HbF) is a principal oxygen carrier in the blood of preterm and term neonates. Compared to adult hemoglobin, it has a significantly higher affinity for oxygen and its oxyhemoglobin dissociation curve (ODC) is left-shifted accordingly. Tissue oxygenation measured with near-infrared spectroscopy (NIRS) during neonatal intensive care is directly affected by hemoglobin concentration. We performed a systematic qualitative review regarding the impact of HbF on tissue oxygenation monitoring by NIRS. The PubMed/Medline, EMBASE, Cochrane library and CINAHL databases were searched from inception to May 2021 for studies relating to HbF and NIRS in preterm and term neonates in the first days and weeks after birth. Out of 1,429 eligible records, four observational studies were included. Three studies found no effect of HbF on cerebral tissue oxygenation. One peripheral NIRS study found a positive correlation between HbF and peripheral fractional oxygen extraction (FOE). Currently available limited data suggest that FHbF could affect peripheral muscle FOE, but seems not to affect cerebral oxygenation in preterm neonates. More studies are needed to draw a final conclusion on this matter, especially concerning the oxygenation changes driven by adult RBC transfusions.

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