نتایج جستجو برای: hemoglobin oxygen saturation

تعداد نتایج: 295909  

Journal: :The Journal of experimental biology 2005
Sandra Grillitsch Nikolaus Medgyesy Thorsten Schwerte Bernd Pelster

Several studies suggest that during early larval development of lower vertebrates convective blood flow is not essential to supply oxygen to the tissues, but information about the oxygenation status of larvae during the time of cutaneous respiration is still missing. If convective oxygen transport contributes to the oxygen supply to tissues, venous blood in the central circulatory system should...

2017
Olga Rapp Ofer Yifrach

Hemoglobin is a classical model allosteric protein. Research on hemoglobin parallels the development of key cooperativity and allostery concepts, such as the 'all-or-none' Hill formalism, the stepwise Adair binding formulation and the concerted Monod-Wymann-Changuex (MWC) allosteric model. While it is clear that the MWC model adequately describes the cooperative binding of oxygen to hemoglobin,...

Journal: :Clinical chemistry 2012
Berndt Zur Bernd Mayer-Hubner Michael Ludwig Birgit Stoffel-Wagner

In April 1997, a then 4-year-old boy suddenly fell ill with fever, cough, fatigue, and poor physical resistance to stress. Marked cyanosis of the lips and the nail beds was noted. During his 3-week hospital stay, mycoplasmosis of the lung and a respiratory syncytial virus infection were diagnosed by the detection of high-titer Mycoplasma agglutinins in serum samples and positive test results fo...

Journal: :iranian journal of public health 0
m. assadi p. samar f. moghadam m. hakimipour r. razmi

the quality of the river water is assessed in different months in different stations to evaluate the change in the quality in re1ation with the various point sources along the river. thirteen parameters were measured in the samples manually taken from three meters off shore in 20 cm. depth in four points representing the quality in four reaches under consideration. the results revealed that nat...

Journal: :The Journal of clinical investigation 1968
M J Edwards M J Novy C L Walters J Metcalfe

Blood from patients with erythrocytosis secondary to arterial hypoxemia due either to congenital heart disease or to chronic obstructive pulmonary disease was shown to have a decreased affinity for oxygen; the average oxygen pressure required to produce 50% saturation of hemoglobin with oxygen was 29.8 mm Hg (average normal, 26.3 mm Hg). Such a displacement of the blood oxygen equilibrium curve...

Journal: :Haematologica 2013
Xavier Waltz Marc Romana Marie-Laure Lalanne-Mistrih Roberto F Machado Yann Lamarre Vanessa Tarer Marie-Dominique Hardy-Dessources Benoît Tressières Lydia Divialle-Doumdo Marie Petras Frederic Maillard Maryse Etienne-Julan Philippe Connes

The aim of the study was to determine the factors associated with resting and exercise-induced hemoglobin oxygen desaturation. The well-established six-minute walk test was conducted in 107 sickle cell children (50 with sickle hemoglobin C disease and 57 with sickle cell anemia) at steady state. Hemoglobin oxygen saturation was measured before and immediately after the six-minute walk test. Blo...

Journal: :Optics letters 2011
Yu Wang Song Hu Konstantin Maslov Yu Zhang Younan Xia Lihong V Wang

We developed dual-modality microscope integrating photoacoustic microscopy (PAM) and fluorescence confocal microscopy (FCM) to noninvasively image hemoglobin oxygen saturation (sO₂) and oxygen partial pressure (pO₂) in vivo in single blood vessels with high spatial resolution. While PAM measures sO₂ by imaging hemoglobin optical absorption at two wavelengths, FCM quantifies pO₂ using phosphores...

2013
Xavier Waltz Marc Romana Marie-Laure Lalanne-Mistrih Roberto F Machado Yann Lamarre Vanessa Tarer Marie-Dominique Hardy-Dessources Benoît Tressières Lydia Divialle-Doumdo Marie Petras Frederic Maillard Maryse Etienne-Julan Philippe Connes Martine Torres

The aim of the study was to determine the factors associated with resting and exerciseinduced hemoglobin oxygen desaturation. The well-established 6-minute-walk test was conducted in 107 sickle cell children (50 with sickle hemoglobin C disease and 57 with sickle cell anemia) at steady state. Hemoglobin oxygen saturation was measured before and immediately after the 6-minute-walk test. Blood sa...

Journal: :Applied optics 2006
Michael P Siegel Young L Kim Hemant K Roy Ramesh K Wali Vadim Backman

We report the feasibility of monitoring both hemoglobin oxygen saturation and hemoglobin concentration in the superficial layer of tissue using polarization-gated elastic light-scattering spectroscopy. We detail our analysis technique, the experimental validation of our analysis, and the detection of an early increase in blood supply to the superficial layer of colon tissue in human patients wi...

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