Videodensitometric Determination of Oxyhemoglobin Saturation (SO2) in Muscle Capillaries
The transport of oxygen to striated muscle cells is comprised of two principal components: one convective and the other diffusive. To evaluate the convective component it is necessary to quantify the amount of oxygen delivered to the site of exchange. Therefore, one must determine the number of red cells in the delivery vessel, the velocity of the red cells and their level of oxygenation. Oxygen is carried in the blood in two forms. About 98% of the oxygen is bound to red cell hemoglobin at normal hematocrit with the remaining 2% dissolved in the plasma. Therefore, a relatively accurate estimate of the level of oxygenation can he obtained from measurements of oxygen saturation.
KeywordsOxygen Saturation Video Analyzer Optical Density Ratio Hemoglobin Solution Striate Muscle Cell
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