deoxyhemoglobin

10/01/2023 - "The significantly greater muscle O2 extraction during maximal exercise in chronic hypoxia is suggestive of an O2 reserve.NEW & NOTEWORTHY During incremental exercise muscle deoxyhemoglobin (HHb) and oxygen consumption (V̇o2) both increase linearly, and the slope of their relationship is an indirect index of local muscle O2 extraction. "
09/01/2014 - "Cerebral oxygenation decreased progressively with increasing exercise-hypoxia in both trials, with a lower level of deoxyhemoglobin POST at 2400, 3500 and 4800 m. "
01/01/2023 - "Discussion: Resting perfusion measures generated by The BOLD analysis resulting from a transient hypoxia induced variations in deoxyhemoglobin analyzed by TFA are congruent with those analyzed by conventional AIF analysis."
01/01/2023 - "We used non-invasive transient hypoxia-induced deoxyhemoglobin as an MRI contrast. "
10/01/2020 - "The extended model, which was cross-validated with a multicompartment BOLD model, considers the influences of the reduced arterial saturation level and increased baseline cerebral blood volume (CBV) and deoxyhemoglobin concentration on the changes of BOLD signals in hypoxia. "

01/01/2011 - "In 26 malignant tumors of 0.6-2.5 cm in size, Hb(T) was significantly greater than that in the fibroglandular tissue of the same breast (P = .0062). "
01/01/1994 - "Differences between the two methods may be particularly significant for studies of tumors where large concentrations of deoxyhemoglobin and other paramagnetic substances may cause significant susceptibility gradients. "
11/01/2022 - "DOS showed increased content of deoxyhemoglobin that led to reduction of saturation level for Colo320 as compared to other tumors. "
01/01/2019 - "The T1 -weighted signal increase may signify a dominating BOLD effect triggered by 16% O2 in the relatively more hypoxic tumors, whereby the influence of increased paramagnetic deoxyhemoglobin outweighs decreased pO2 . "
05/01/2012 - "In vivo tumor-to-normal contrast was greater than ∼1.5 in reduced scattering coefficient for all wavelengths and was ∼1.3 for the tissue concentration of deoxyhemoglobin (ctHb). "

03/01/2016 - "Applying this technique to forearm reactive hyperemia protocols demonstrates the ability to resolve intrinsic physiological signals such as the heart beat waveform and the buildup of deoxyhemoglobin associated with oxygen consumption. "
04/01/1998 - "Near infrared spectroscopy (NIRS) separated reactive hyperemia into two phases according to the tissue level of deoxyhemoglobin and deoxymyoglobin (tHb+Mb): (1) an early phase during which the tHb+Mb level was supranormal, reflecting enhanced O2 extraction; and (2) a late phase during which the tHb+Mb level was below baseline, reflecting decreased O2 extraction and increased tissue O2 availability. "
01/01/2010 - "TRS demonstrated a decrease of oxyhemoglobin, total hemoglobin, and oxygen saturation associated with an increase of deoxyhemoglobin in all of the regions measured just after embolization, indicating that embolization improved hyperemia caused by the AV shunt. "
03/01/1990 - "Conversely, a low-dose dopamine infusion had no effect on cerebral hemodynamics, but high-dose decreased blood pressure and cerebral oxyhemoglobin, and increased deoxyhemoglobin without appreciable changes in cerebral blood flow, which suggests venous congestion and arterial blood reduction in the brain."
03/01/2004 - "The changes in relative concentration of oxyhemoglobin and deoxyhemoglobin in the cutaneous microvasculature were assessed at rest, during limb elevation, dependency, and cuff-mediated reactive hyperemia for the forearm of 25 normal subjects and 105 feet of patients with peripheral arterial occlusive disease (PAOD) (normal=28, claudication=34, limb threatening ischemia=44). "

12/21/2009 - "We found the best hemoglobin correlations were when ratios at isosbestic points of oxy- and deoxyhemoglobin were used, specifically 529/500 nm. Baseline subtraction improved correlations, specifically at 520/509 nm. These results demonstrate proof-of-concept for the ability of this noninvasive device to monitor hemoglobin concentration changes due to surgical blood loss. "

10/01/2010 - "The collected data was distributed according to age, sex, and prakruti, and a t-test was applied for the clinical assessment of the subjective and objective parameters of 'Amrita Ghrita,' and it has shown significant reduction in the positivity of the RA titer (t > 5.09, at the 0.001% level), ASO titer (t > 4.08, at the 0.001% level), and CRP titer (t > 4.82, at the 0.001% level), and weight gain (t > 5.12, at the 0.001% level), as also an increase in Hb% (t >9.22, at the 0.001% level), and platelet count (t> 5.90, at the 0.001% level), and decrease in ESR (t > 9.70, at the 0.001% level)."