By Peter L. Steponkus
ISBN-10: 0080552285
ISBN-13: 9780080552286
ISBN-10: 0762301600
ISBN-13: 9780762301607
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Additional resources for Advances in Low-Temperature Biology, Volume 3
Sample text
BAILES 1960). The earliest experimental abstract report was published in 1954, but included no details of functional or neurological outcome (GoUan, 1955). A brief summary of the most significant experimental reports relating to whole-body, asanguineous perfusion is presented in Table 2. In the early 1960s, Neely et al. showed that a 30% survival rate in dogs exposed to total asanguineous body perfusion at moderate hypothermia of 27 to 30°C for 30 minutes was possible (Neely, 1963). Only 5 of 33 animals survived long term without any complications.
To avoid the confounding influence of the many other variables in this complex experimental model, all other details of the procedure were standardized between the two groups of dogs. This was particularly important since comparisons with other studies, particularly our own earlier studies using the previous generation of blood substitutes, could be complicated by improvements in technique itself. These include modifications to the extracorporeal circuit by incorporating a membrane oxygenator and centrifugal pump in place of the roller pump and bubble oxygenator used in our preliminary studies.
They concluded that only 60 minutes of circulatory arrest is safe using low molecular weight dextran with and without hemodilution. Klebanoff and Philips (1969) claimed to have shown improved results from the previous two studies by combining profound hypothermia and total body perfusion using Tham-E buffered Ringer's solution. Thirteen of 16 animals survived when exposed to this procedure for a period of up to 95 minutes at temperatures as low as 7°C in some animals, but at 11 to 13°C in the survivors.
Advances in Low-Temperature Biology, Volume 3 by Peter L. Steponkus
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