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P50 values of non smoker and smoker pregnant women
The influence of tobacco smoke during pregnancy on haemoglobin concentration and oxygen affinity of smoker women has been studied. Fifty-nine non smoker (NSW) and forty-five smoker women (SW) were investigated during pregnancy and early puerperium. Results have shown: 1) a slight non significant increase in oxygen affinity of SW; 2) a significant decrease in oxygen affinity in SW at term and early puerperium, the same as in NSW; 3) a significant increase in haemoglobin concentration of SW at term as compared to NSW. The small modifications of oxygen affinity of SW and the increase in haemoglobin concentration at term suggest that the oxygen delivery from the maternal to the fetal blood are probably unaffected by these factors.
The influence of tobacco smoke during pregnancy on haemoglobin concentration and oxygen affinity of smoker women has been studied. Fifty-nine non smoker (NSW) and forty-five smoker women (SW) were investigated during pregnancy and early puerperium. Results have shown: 1) a slight non significant increase in oxygen affinity of SW; 2) a significant decrease in oxygen affinity in SW at term and early puerperium, the same as in NSW; 3) a significant increase in haemoglobin concentration of SW at term as compared to NSW. The small modifications of oxygen affinity of SW and the increase in haemoglobin concentration at term suggest that the oxygen delivery from the maternal to the fetal blood are probably unaffected by these factors.