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  • blood
  • Here dP is considered to be the change in partial pressure in the blood of a gas required for diffusion equilibrium. (comprehensivephysiology.com)
  • Guided by strong preliminary data, the central hypothesis will be tested by pursuing three Specific Aims: 1) Optimize 3D blood-selective 129Xe gas exchange MRI 2) Establish image reproducibility as a function of time, posture, and cardiac output, and 3) Image the temporal evolution of regional gas exchange during radiation therapy. (grantome.com)
  • Blood gases and respiratory pattern in exercising fowl: comparison in normoxic and hypoxic conditions. (semanticscholar.org)
  • Blood Gas Transport - Duration: 41 minutes. (youtube.com)
  • Measurement of inequality of ventilation and blood flow in the lung by using short-lived radioactive gases. (wikipedia.org)
  • Breath gas concentration can then be related to blood concentrations via mathematical modeling as for example in blood alcohol testing. (wikipedia.org)
  • The simplest model relating breath gas concentration to blood concentrations was developed by Farhi C A = C v ¯ λ b:air + V ˙ A / Q ˙ c , {\displaystyle C_{A}={\frac {C_{\bar {v}}}{\lambda _{\text{b:air}}+{\dot {V}}_{A}/{\dot {Q}}_{c}}},} where C A {\displaystyle C_{A}} denotes the alveolar concentration which is assumed to be equal to the measured concentration. (wikipedia.org)
  • While there is general agreement that an arterial blood gas measurement which shows that the partial pressure of oxygen is lower than normal constitutes hypoxemia, there is less agreement concerning whether the oxygen content of blood is relevant in determining hypoxemia. (wikipedia.org)
  • The fluid coating is produced by the body in order to facilitate the transfer of gases between blood and alveolar air. (wikipedia.org)
  • disease
  • The proposed research is significant because the imaging method being developed is expected to provide a long-sought window on gas transfer into the pulmonary microcirculation as a harbinger of changing disease status. (grantome.com)
  • Smoking is the main risk factor but inhalation of toxic and harmful particles and gases can also cause the disease. (wikipedia.org)
  • mechanisms
  • [11,Given these discrepant results and because improvement of oxygenation is the major aim of IRV, a better understanding of the mechanisms underlying the effects of IRV on pulmonary gas exchange is warranted. (asahq.org)
  • Oxygen
  • In calibration experiments using a gas-mixing technique a high degree of linearity was found, both in the determination of the fraction of oxygen and carbon dioxide (r equal to 0.9996). (biomedsearch.com)
  • Pulmonary TB is most common at the top of the lung, because the bacteria likes oxygen rich environments. (wordpress.com)
  • In other words, not all the air in each breath is available for the exchange of oxygen and carbon dioxide. (wikipedia.org)
  • The apex, though showing a higher oxygen partial pressure, ventilates less efficiently since its compliance is lower and so smaller volumes are exchanged. (wikipedia.org)
  • cardiac
  • In theory, liquid breathing could assist in the treatment of patients with severe pulmonary or cardiac trauma, especially in pediatric cases. (wikipedia.org)
  • exercise
  • CONCLUSION: Noninvasive pulmonary gas exchange indices during submaximal exercise are different in HF patients with combined post-and pre-capillary PH compared to patients with isolated post-capillary PH or no-PH. (exeter.ac.uk)
  • Arterial hypoxaemia produced by the pulmonary shunt probably accounted for some of the exercise hyperpnoea, partly by increasing the chemoreceptor drive and partly by encouraging lacticacidaemia. (clinsci.org)
  • mmHg
  • We studied 20 adult mongrel dogs weighing 12 to 23 kg divided into two groups: ischemia-reperfusion group (IRG, N = 10) and IRG submitted to saline infusion for the maintenance of mean pulmonary arterial wedge pressure between 10 and 20 mmHg (IRG-SS, N = 10). (unifesp.br)
  • 200 mmHg) and bilateral pulmonary infiltrates. (asahq.org)
  • measurement
  • The rationale for the proposed research is that developing a method that can non-invasively evaluate regional gas exchange will dramatically accelerate research in pulmonary medicine by providing a more sensitive and specific measurement that can be used repeatedly. (grantome.com)
  • airways
  • At the end of inhalation the airways are filled with environmental air, which is exhaled without coming in contact with the gas exchanger. (wikipedia.org)
  • fibrosis
  • The first aim i s expected to improve the current gas exchange image resolution 8-fold, add specificity for fibrosis, and establish the key MR physics governing the acquisition. (grantome.com)
  • Morphologic-physiologic correlates of the severity of fibrosis and degree of cellularity in idiopathic pulmonary fibrosis. (semanticscholar.org)
  • Temperature
  • At standard temperature and pressure, pure xenon gas has a density of 5.761 kg/m3, about 4.5 times the density of the Earth's atmosphere at sea level, 1.217 kg/m3. (wikipedia.org)
  • analysis
  • Quantitative analysis of hyperpolarized 129 Xe gas transfer MRI. (semanticscholar.org)
  • Breath gas analysis is a method for gaining non-invasive information on the clinical state of an individual by monitoring volatile organic compounds present in the exhaled breath. (wikipedia.org)
  • Breath gas analysis is used in a number of breath tests. (wikipedia.org)
  • The three basic types of breath collector for VOC analysis are: Coated stainless steel canister End tidal air collector Tedlar bag Each of these can be used as a vehicle for direct introduction of a gas sample into an appropriate analytical instrument, or serve as a reservoir of breath gas into which an absorption device such as an SPME fiber is placed to collect specific compounds. (wikipedia.org)
  • research
  • This book delivers the research on pulmonary gas exchange in the body. (worldcat.org)
  • Completion of these aims will establish the utility, sensitivity and limitations of this new method compared to gold standards, while positioning it as a sensitive biomarker for research in pulmonary medicine. (grantome.com)
  • One research group led by Thomas H. Shaffer has maintained that with the use of microprocessors and new technology, it is possible to maintain better control of respiratory variables such as liquid functional residual capacity and tidal volume during TLV than with gas ventilation. (wikipedia.org)
  • pressure
  • at X 0 which rises to a maximum end‐capillary partial pressure ( P c ') at X '. Consider a tiny increment of distance along the pulmonary capillary ( dX ). (comprehensivephysiology.com)
  • Thus, a large β (i.e., β1) means that there is a large sink for a gas, more molecules must be transferred before the partial pressure rises, compared to the situation where β is relatively small (i.e., β2). (comprehensivephysiology.com)
  • Function
  • The central hypothesis is that regional gas exchange is the most sensitive marker of early changes in pulmonary function compared to available means. (grantome.com)
  • The proposed approach is innovative because it exploits the unique properties of HP 129Xe MRI and an innovative acquisition to image lungs'most fundamental function - gas exchange. (grantome.com)
  • The impaired respiratory function may give way for the development of pulmonary complications. (jcdr.in)
  • mean
  • and (3) improved intrapulmonary distribution of the inspired gas due to the lower mean inspiratory flow. (asahq.org)
  • breath
  • This dilution factor can be calculated once the CO2 in the exhaled breath is determined (either by electronically monitoring the exhaled breath or by collecting the exhaled breath in a gas impermeant bag (a Douglas bag) and then measuring the mixed gas in the collection bag). (wikipedia.org)
  • The area of modern breath testing commenced in 1971, when Nobel Prize winner Linus Pauling demonstrated that human breath is a complex gas, containing more than 200 different volatile organic compounds. (wikipedia.org)