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Continuing Education in Anaesthesia, Critical Care & Pain 2005 5(4):142-143; doi:10.1093/bjaceaccp/mki038
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Continuing Education in Anaesthesia, Critical Care & Pain | Volume 5 Number 4 2005 © The Board of Management and Trustees of the British Journal of Anaesthesia [2005]. All rights reserved. For Permissions, please email: journals.permissions@oupjournals.org

Multiple Choice Answers

The first 150 words of the full text of this article appear below.

81. In the fetal circulation:
(a) False; (b) False; (c) False; (d) True; (e) False
(a,c) In the fetus, the left and right ventricles have different stroke volumes and cardiac output is defined in terms of combined ventricular output (CVO). (b) Deoxygenated blood arrives at the placenta via the two umbilical arteries. (d) Only 12 % of the output of the right ventricle enters the pulmonary circulation, the rest being diverted into the ductus arteriosus. (e) More highly oxygenated blood enters the inferior vena cava via the ductus venosus and is directed into the left atrium.
82. Regarding fetal blood:
(a) False; (b) False; (c) False; (d) True; (e) True
(a,c,d) Fetal blood has a high percentage of HbF, which has a lower content of 2,3-diphoshoglycerate, thus shifting the oxygen dissociation curve to the left. The P50 value for fetal blood is around 3.6 kPa. (b) The haemoglobin concentration in . . . [Full Text of this Article]


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