منابع مشابه
Haemoglobin, oxygen carriers and perioperative organ perfusion.
Under normal conditions, only 20-30% of the delivered oxygen is metabolised. In normovolaemic anaemia, the organism reacts with increases in cardiac output and oxygen extraction. Once these mechanisms are exceeded, allogeneic blood transfusions may be administered. However, such transfusions are associated with serious adverse effects and alternatives such as artificial oxygen carriers are bein...
متن کاملHaemoglobin and the oxygen uptake of leguminous root nodules.
Brenchley, W. E. & Thornton, H. G. (1925). Proc. Roy. Soc. B, 98, 373. Burris, R. H. & Haas, E. (1944). J. biol. Chem. 155, 227. Keilin, D. (1933). Proc. Roy. Soc. B, 113, 393. Keilin, D. & Smith, J. D. (1947). Nature, Lond., 159, 692. Keilin, D. & Wang, Y. L. (1945). Nature, Lond., 155, 227. Keilin, D. & Wang, Y. L. (1946). Biochem. J. 40, 855. Kubo, H. (1939). Acta phytochim, Tokyo, 11, 195. ...
متن کاملOxygen delivery to tissues.
For health, well perfused tissues, oxygen uptake is determined primarily by metabolic need rather than by oxygen supply. Tissue hypoxia supervenes when tissue oxygen tension (PO2) falls below a critical point, and the point where this occurs can be predicted from the systemic oxygen delivery or extraction ratio. A growing body of evidence suggest that tissue oxygen extraction may be impaired in...
متن کاملOxygen delivery through capillaries.
During physical exertion the consumption rate increases and some cells suffer from the lack of oxygen. The time-wise evolution of hypoxia is analyzed mathematically under the condition the perfusion of each capillary is constant. The domain used contains multiple non-homogeneous capillaries of different solute out. Cells surrounding capillaries may consume or preserve more oxygen than are neces...
متن کاملTranstracheal oxygen delivery.
Conventional tracheostomies have been used for many years to deliver oxygen with the patient breathing spontaneously or in conjunction with positive pressure ventilators. The insertion of a transtracheal catheter specifically to deliver oxygen, however, dates only from Heimlich's studies published in 1982.' He showed that in dogs and man a normal oxygen saturation could be maintained by the del...
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ژورنال
عنوان ژورنال: Continuing Education in Anaesthesia Critical Care & Pain
سال: 2004
ISSN: 1743-1816
DOI: 10.1093/bjaceaccp/mkh033