Measurement of oxygen consumption. Medical search. Frequent questions

5 , 6 MR susceptometry uses gradient-echo phase maps to estimate oxygen saturation in segments of the jugular and gray matter veins. (ajnr.org)
7 , 8 Susceptibility-weighted imaging is a type of MR susceptometry that can obtain measurements of venous oxygen saturation by using the phase difference between the venous blood and surrounding tissue. (ajnr.org)
The OxiplexTS, a non-invasive tissue oximeter for the measurement of oxy- and deoxy-hemoglobin concentration in tissues, total blood volume and oxygen saturation. (iss.com)

The Er1 F/− EV cargo is taken up by recipient cells leading to an increase in insulin-independent glucose transporter levels, enhanced cellular glucose uptake, higher cellular oxygen consumption rate and greater tolerance to glucose challenge in mice. (nature.com)
For climbing a ladder at inclination of 30 degrees from vertical the whole body oxygen uptake was linearly related to both work rate in kilogram-meters and body weight in kilograms with the regression coefficients for work rate higher and for body weight lower for males than for females. (cdc.gov)
The linearity of ventilation and heart rates on work rate were also applied to oxygen uptake and revealed somewhat steeper regression for females than for males. (cdc.gov)
VO2max can be defined as the maximum oxygen uptake. (bartleby.com)
The fourth, and most significant, response to training that a touch football player would experience is a change in their oxygen uptake. (bartleby.com)
Pmax (Watt) depends on energy consumption and the maximum oxygen uptake (VO2max). (techstartups.com)
These include increased blood, stroke and heart volume, oxygen uptake, enhanced optimum cardiac output, increased capillary density, increased mitochondria density, increased activity of citric acid cycle enzymes, and a lowered resting heart rate. (norwiski.com)
It is also known as maximal oxygen consumption, peak oxygen uptake, maximal aerobic capacity, or maximal oxygen uptake. (norwiski.com)
Zone one (or level one) is the easiest for aerobic endurance purposes and requires 60 percent of a person's maximum heart rate, 50 percent of his maximum oxygen uptake (VO2 max), or a blood lactate level at 2.0 mmol or lower. (norwiski.com)
Examine ECG, ventilation, oxygen uptake, carbon dioxide production, blood pressure and core/surface temperature data in real-time, or analyze results in greater detail in an easy-to-read graph format. (biopac.com)

On a separate day, players were assessed for body composition with dual-energy X-ray absorptiometry and performed countermovement jump, maximal voluntary isometric knee extensor contraction, a 15-second maximal sprint test, and a submaximal and incremental test on a bike ergometer in which pulmonary oxygen consumption was determined. (humankinetics.com)
Exercise capacity was assessed by maximal oxygen consumption (VO2max) during upright bicycle ergometry. (nih.gov)
Before the first week and after the last week, researchers took measurements of blood volume, maximal anaerobic power, and maximal oxygen consumption. (inverse.com)

In the short-term anthropometric measurements and their variation overtime were not correlated with metabolic syndrome/diabetes. (frontiersin.org)
This battery of measurements are used in the diagnosis and treatment of certain liver, heart, and kidney diseases, acid-base imbalance in the respiratory and metabolic systems, other diseases involving lipid metabolism and various endocrine disorders as well as other metabolic or nutritional disorders. (cdc.gov)
Together with pH determination, bicarbonate measurements are used in the diagnosis and treatment of numerous potentially serious disorders associated with acid-base imbalance in the respiratory and metabolic systems. (cdc.gov)
BUN measurements are used in the diagnosis of certain renal and metabolic diseases. (cdc.gov)
With the advances of magnetic resonance technology, the CBF, oxygen extraction fraction, and cerebral metabolic rate of oxygen can be measured in MRI. (ajnr.org)
Our aim was to measure the CBF, oxygen extraction fraction, and cerebral metabolic rate of oxygen use in patients with different severities of middle cerebral artery stenosis or acute stroke by using the arterial spin-labeling and susceptibility-weighted imaging techniques. (ajnr.org)
Arterial spin-labeling and SWI sequences were used to acquire CBF, oxygen extraction fraction, and cerebral metabolic rate of oxygen. (ajnr.org)
Hemispheres with occluded MCA (group 3) or acute stroke (group 4) had a significantly lower CBF and cerebral metabolic rate of oxygen and a significantly higher oxygen extraction fraction than the contralateral hemisphere. (ajnr.org)
When this offset a decrease in CBF, the cerebral metabolic rate of oxygen remained at a normal level. (ajnr.org)
An occluded MCA led to reduction in both the CBF and cerebral metabolic rate of oxygen. (ajnr.org)
Moreover, the oxygen extraction fraction and cerebral metabolic rate of oxygen significantly increased and decreased, respectively, in the occluded MCA region during acute stroke. (ajnr.org)
It is possible to use both parameters and the arterial oxygen content to derive cerebral metabolic rate of oxygen (CMRO 2 ) use, which is of critical importance in the occurrence of stroke. (ajnr.org)
measuring either the basal level, or the task-induced response of cerebral metabolic rate of oxygen consumption (CMRO 2 ). (frontiersin.org)
The BOLD signal is dependent on the concentration of deoxygenated hemoglobin in blood, which is modulated by changes in cerebral blood flow (CBF), cerebral blood volume (CBV), and cerebral metabolic rate of oxygen consumption (CMRO 2 ). (frontiersin.org)

Normally, tests to accurately measure VO2max -- a key measurement of overall fitness and an important predictor of heart disease and mortality risk -- require expensive laboratory equipment and are mostly limited to elite athletes. (sciencedaily.com)
The new method uses machine learning to predict VO2max -- the capacity of the body to carry out aerobic work -- during everyday activity, without the need for contextual information such as GPS measurements. (sciencedaily.com)
A measurement of VO2max is considered the 'gold standard' of fitness tests. (sciencedaily.com)
Professional athletes, for example, test their VO2max by measuring their oxygen consumption while they exercise to the point of exhaustion. (sciencedaily.com)
VO2max isn't the only measurement of fitness, but it's an important one for endurance, and is a strong predictor of diabetes, heart disease, and other mortality risks," said co-author Dr Soren Brage from Cambridge's MRC Epidemiology Unit. (sciencedaily.com)
However, since most VO2max tests are done on people who are reasonably fit, it's hard to get measurements from those who are not as fit and might be at risk of cardiovascular disease. (sciencedaily.com)
There are two factors that are important in determining a persons VO2max, which are the hearts ability to deliver oxygen to the muscles and the muscles ability to extract the oxygen from the blood and use it (Brown, Miller and Eason). (bartleby.com)
This means that when a person has a high VO2max their body is able to deliver oxygen through the blood efficiently to the muscles in order to maintain high levels of aerobic exercise over an extended period of time. (bartleby.com)
VO2max is a valued measurement of cardiovascular fitness in the Sport industry due to its ability to indicate cardiovascular fitness, as well as the pulmonary and muscular systems efficiency throughout the duration of the exercise (Brown, Miller and Eason). (bartleby.com)

Fat oxidation can be assessed clinically by measuring respiratory quotient (RQ), which is the ratio of the carbon dioxide expired to the oxygen consumed during indirect calorimetry. (frontiersin.org)
1.2 This test method differs from Test Method E1354 in that it prescribes a different specific test specimen size, specimen holder, test specimen orientation, a direct connection between the plenum and the top plate of the cone heater assembly to ensure complete collection of all the combustion gases ( Fig. 1 ), and a lower volumetric flow rate for analyses via oxygen consumption calorimetry. (astm.org)
The TSE indirect calorimetry system collects data on oxygen consumption, carbon dioxide production, food consumption, and locomotor activity in up to 8 animals at a time. (uab.edu)

[ 5-10 ] Cardiac output may be calculated by using the Fick equation if Vȯ 2 , hemoglobin level, and the arterial-venous oxygen difference are known. (medscape.com)
[ 11 ] However, it is difficult to measure Vȯ 2 and cardiac output, and they are rarely measured outside of research investigations, despite the suggestion that measurement of cardiac output and oxygen delivery would improve clinical outcomes of critically ill children. (medscape.com)
Since the cardiac output was similar between the conditions, the reduction of Pmax was primarily driven by the observed reduction of the arterio-venous oxygen content (avDO2). (techstartups.com)
were significantly lower in hypoxia-acclimated cod at both levels of oxygenation, because of lower values for V S . However, hypoxia-acclimated cod were able to consume more oxygen for a given cardiac output. (biologists.com)

11 , 12 The gray matter CMRO 2 can be obtained from local CBF and OEF measurements. (ajnr.org)
By incorporating measurement of, and correction for, the reduction in basal CMRO 2 during hypercapnia in the measurement of M -values, application of our approach will correct for an overestimation in both CMRO 2 task-response values and absolute CMRO 2 . (frontiersin.org)
CMRO 2 directly reflects tissue metabolism, so is widely considered a more direct measurement of underlying neuronal activity than the cerebrovascular CBF and CBV responses. (frontiersin.org)

However, for test 2, participants with CFS achieved significantly lower values for oxygen consumption and workload at peak exercise and at the ventilatory or anaerobic threshold. (nih.gov)
Aerobic metabolism is dependent on oxygen and utilized during distance trainings, taking up a lot more energy from the skier, as compared to anaerobic metabolism, by breaking down body fats instead of glucose. (norwiski.com)
Anaerobic metabolism is triggered when the pace or intensity of the activity increases, and essentially means that the body's oxygen demand is greater than its supply, as the body finds it hard to cope with such demand. (norwiski.com)
Zone two (or level two) is defined as the general endurance zone as the anaerobic energy consumption is increased gradually. (norwiski.com)
Anaerobic Threshold - Use the power of Acq Knowledge to establish a ratio of inspired volume and VO2 consumption and to integrate the air flow signal to obtain total inspired volume in real time. (biopac.com)
In patients with IPAH, values for peak exercise oxygen consumption, oxygen pulse, and ventilator equivalents (ratio of expired volume to carbon dioxide output [ie, wasted ventilation fraction] at the anaerobic threshold) during exercise are abnormal to varying degrees. (medscape.com)

Cerebral circulation and oxygen consumption elevate. (medscape.com)
A reduction in cerebral blood flow in brain tissue is typically accompanied by a compensatory increase in the oxygen extraction fraction (OEF) to maintain normal neuronal function. (ajnr.org)

Simultaneous measurements of glycolysis and oxidative phosphorylation in live cells revealed that OB differentiation decreased the oxygen consumption rate, which indicates reduced ATP production and mitochondrial respiration. (nih.gov)
To do this, they look at your heart rate data, respiration date, and oxygen consumption, as well as all the personal information you've entered into the watch (both Apple and Garmin advise updating this information when it changes for more accurate measurements). (tomsguide.com)
Pelagic respiration is estimated by sensitive oxygen (O2) consumption methods, and converted to carbon dioxide (CO2) production by a fixed 1:1 'respiratory quotient' (RQ). (lu.se)

Objective To compare measurements of Vȯ 2 using respiratory mass spectrometry and the breath-by-breath method. (medscape.com)
Fat oxidation can be assessed clinically by a respiratory quotient measurement during fasting. (frontiersin.org)

1.3 The rate of heat release is determined by measurement of the oxygen consumption as determined by the oxygen concentration and the flow rate in the exhaust product stream. (astm.org)

In addition, in some patients after cardiac surgery, the potential or predicted inequality between systemic and pulmonary blood flow if a cardiac shunt is present renders pulmonary artery catheters unreliable for measurement of systemic blood flow. (medscape.com)

Low water oxygen content (hypoxia) is a common feature of many freshwater and marine environments. (biologists.com)

The in vitro effects of metronidazole on the production of reactive oxygen species by polymorphonuclear (PMN) cells were studied by means of nitroblue tetrazolium and luminol-dependent chemiluminescence. (who.int)
At therapeutic doses of metronidazole (4.98-24.86 μg/mL) significant inhibition of the production of reactive oxygen species was noted in both methods. (who.int)
The data suggest a scavenging mechanism of metronidazole on reactive oxygen species generated by PMN. (who.int)
With intact cells, the to radiation killing compared with well formation of oxygen reactive intermediates oxygenated healthy cells [ 2,3,7-9 ]. (who.int)

b) For each examined person, a Food Frequency interview was administered to ascertain usual patterns of food consumption. (cdc.gov)

This entails the maximum rate at which oxygen is readily available in the body to be taken up and used during aerobic exercise. (bartleby.com)
The effective heat of combustion is determined from a concomitant measurement of test specimen mass loss rate, in combination with the heat release rate. (astm.org)
Outside of the study, some athletes artificially boost their red blood cell count to increase their maximum rate of oxygen consumption, which in turn allows the blood to carry more oxygen to their muscles and boosts endurance and health. (inverse.com)
The watches will estimate your VO2 max, which is the maximum rate of oxygen the body is able to use during exercise), as you get fitter and your VO2 max increases. (tomsguide.com)

Glucose measurements are used in the diagnosis and treatment of pancreatic islet cell carcinoma and of carbohydrate metabolism disorders, including diabetes mellitus, neonatal hypoglycemia, and idiopathic hypoglycemia. (cdc.gov)
the combined measurements give the oxygen consumption of the tissue or metabolism. (iss.com)

VO2 Max is the maximum volume (V) of Oxygen (O2) consumption which is measured during exercises that have an incremental increase in intensity. (norwiski.com)

Thus, if an altered ability to oxidize FA represents an important contributor to the genesis of insulin resistance, assessing the capacity to burn fat in human subjects by RQ measurements might be a predictor of MetS and T2DM. (frontiersin.org)

This zone signifies that the body is on aerobic energy mode almost fully, with oxygen being readily available. (norwiski.com)

Radiosensitizers are chemical agents that have the potential to increase the lethal effect of radicals induced during irradiation [1-6].The extent of radiation damage to cells is dependent on the amount of oxygen available to the cell [1,2,7,8]. (who.int)

In addition, hemispheres with severe MCA stenosis (group 2) had significantly lower CBF and a significantly higher oxygen extraction fraction than the contralateral hemisphere. (ajnr.org)

Previous studies have shown poor correlations between exercise tolerance and measurements of left ventricular (LV) function during rest in patients with congestive heart failure (CHF). (nih.gov)
To further evaluate the determinants of exercise tolerance and their relation to prognosis, we performed rest and exercise hemodynamic measurements and blood pool scintigraphy in 27 patients with CHF. (nih.gov)

Trevino G. Consensus statement on the Worldwide Standardization of the Hemoglobin A1C Measurement: the American Diabetes Association, European Association for the Study of Diabetes, International Federation of Clinical Chemistry and Laboratory Medicine, and the International Diabetes Federation: response to the Consensus Committee. (msdmanuals.com)

The research team took measurements of exercise performance indicators before and after these training regimens to see if the HIIT protocol improved participant's health. (inverse.com)

While Nordic skiing, the faster you ski the harder it gets on your muscles as they require more oxygen to keep up with the pace. (norwiski.com)

Mice are acclimated for 2 days, before the measurement period of at least one day. (uab.edu)

The calibrated BOLD method is susceptible to errors in the measurement of the calibration parameter M , the theoretical BOLD signal change that would occur if all deoxygenated hemoglobin were removed. (frontiersin.org)
IFCC reference system for measurement of hemoglobin A1c in human blood and the national standardization schemes in the United States, Japan, and Sweden: a method-comparison study. (msdmanuals.com)

The oxygen extraction fraction gradually increased in groups 1-3. (ajnr.org)

With the navy, she had researched the phenomenon of how much oxygen people used while operating hand-pedal ergometers requiring the same type of motion as the Hunley's hand-cranked propulsion system. (smithsonianmag.com)
Locomotor activity is measured in the x-y planes using a system of infra-red beams surrounding the cage and is collected continuously during the measurement. (uab.edu)
Methodology in Oslo, WHO maintains the Anatomical Therapeutic Chemical classification system and the defined daily dose as unit of measurement for classified drugs. (who.int)

Alanine aminotransferase measurements are used in the diagnosis and treatment of certain liver diseases (e.g., viral hepatitis and cirrhosis) and heart diseases. (cdc.gov)
AST measurements are used in the diagnosis and treatment of certain types of liver and heart disease. (cdc.gov)

This can create inhospitable habitats for fish and sedentary animals ( Wu, 2002 ), and severe oxygen depletion of coastal waters has significant negative consequences for economically important fisheries, ecosystems and biodiversity ( UN Global Environment Outlook Year Book, 2003 ). (biologists.com)

1.5 Ignitability is determined as a measurement of time from initial exposure to time of sustained flaming. (astm.org)

At the same time, the solutions ensure more sustainable production with lower resource consumption. (voith.com)

Commonly, a 6-minute walk test is performed in the office as a crude measurement of exercise capacity. (medscape.com)

So, she dug up the data and used it to calculate how much oxygen the crew would have used while cranking their way toward the Housatonic . (smithsonianmag.com)
Each physiological response is recorded in a separate graph channel, with an array of measurements and viewing tools designed to optimize data analysis. (biopac.com)

After 3 h contact time, measurement of oxygen consumption in BOD bottle (approximately 10 min or less, depending on how fast oxygen consumption occurs). (europa.eu)

Calcium measurements are used in the diagnosis and treatment of parathyroid disease, bone diseases, chronic renal disease and tetany. (cdc.gov)
Iron (non-heme) measurements are used in the diagnosis and treatment of diseases such as iron deficiency anemia, chronic renal disease, and hemochromatosis (a disease associated with widespread deposit in the tissues of two iron-containing pigments, hemosiderin and hemofuscin, and characterized by pigmentation of the skin). (cdc.gov)

In addition to the blood pressure criteria, proteinuria of greater than or equal to 0.3 grams in a 24-hour urine specimen, a protein (mg/dL)/creatinine (mg/dL) ratio of 0.3 or higher, or a urine dipstick protein of 1+ (if a quantitative measurement is unavailable) is required to diagnose preeclampsia. (medscape.com)

Blood oxygen level. (who.int)

The correlation between measurements of Vȯ 2 by the 2 methods was good ( R = 0.924). (medscape.com)

The best way to work out your BMR is to look at your lean body mass and get an accurate measurement from your doctor, or at a sports medicine center. (tomsguide.com)

A fast and precise measurement of oxygen consumption seed by seed. (lemnatec.com)

Body composition is always assessed after the measurement period, using QMR, to allow for the energy expenditure measurements to be normalized appropriately for body composition. (uab.edu)
By taking different measurements and comparing the results, for example, human subject and light bulb, the energy in a human body is calculated. (lu.se)

As her investigation got underway, Lance noticed there was very little, if any, published research on the crew's oxygen consumption during the mission. (smithsonianmag.com)

Total and resting energy expenditure is calculated for the measurement period. (uab.edu)

GT measurement is principally used to diagnose and monitor hepatobiliary disease. (cdc.gov)

It is to be hypothesised that participants with a greater Vo2 Max (oxygen capacity) will display superior 5k running performance and that there will be a moderate relationship between the two variables. (bartleby.com)
The measurements show that surgical masks, and to a greater extent FFP2/N95 masks, reduce the maximum power. (techstartups.com)

The objective of this study was to determine the discriminative validity of objective measurements obtained during cardiopulmonary exercise testing to distinguish participants with CFS from participants who did not have a disability but were sedentary. (nih.gov)

Oxygen consumption is directly related to energy use. (lemnatec.com)

This application notes features improved management of medical gas consumption. (bronkhorst.com)

Anatomy17

Organisms12

Diseases8

Chemicals and Drugs64

Analytical, Diagnostic and Therapeutic Techniques and Equipment62

Psychiatry and Psychology8

Phenomena and Processes82

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Calorimetry3

Cardiac output4

CMRO3

Anaerobic6

Cerebral2

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Respiratory2

Concentration1

Pulmonary1

Hypoxia1

Reactive4

Food consumption1

Rate4

Metabolism2

Intensity1

Predictor1

Readily available1

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Significantly lower1

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Clinical1

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Muscles1

Mice1

Hemoglobin2

Gradually1

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