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- W1985382642 abstract "The blood oxygen affinity of vertebrates is regulated, in part, through changes in red cell phosphate levels and increased oxygen affinity during reductions in inspired oxygen and is a well-described and common feature. However, during anaemia, when oxygen delivery is compromised by a reduction in blood oxygen carrying capacity, a lowering of blood oxygen affinity will facilitate oxygen unloading in the tissues, while oxygen loading at the gas exchange organ is not impaired. The present study investigated the effects of artificially induced anaemia in vivo on the blood oxygen affinity and red cell nucleoside triphosphate (NTP) concentrations in the turtle, Chrysemys picta. Blood was obtained from conscious animals through an arterial catheter and oxygen equilibrium curves were determined using the Tucker method while NTP concentrations were analyzed spectrophotometrically. Before induction of anaemia haematocrit averaged 23% and P50 was 18.5±0.7 with a NTP/Hb of 0.20±0.01 (mmol/mmol). After the haematocrit had been reduced to approximately 10% by bleeding (48–96 h) (blood volume was maintained by re-infusion of plasma and Ringer) there were no effects on P50 or red cell NTP concentrations. Thus, in contrast to fish and mammals, turtles do not exhibit a change in blood oxygen affinity during anaemia." @default.
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- W1985382642 date "1999-03-01" @default.
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- W1985382642 title "The effect of isovolemic anaemia on blood O2 affinity and red cell triphosphate concentrations in the painted turtle (Chrysemys picta)" @default.
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- W1985382642 doi "https://doi.org/10.1016/s1095-6433(99)00016-1" @default.
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