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British Journal of Anaesthesia, 1994, Vol. 73, No. 4 522-528
© 1994 The Board of Management and Trustees of the British Journal of Anaesthesia

research-article

Autoradiographic determination of regional cerebral blood flow and metabolism in conscious rats after fluid resuscitation from haemorrhage with a haemoglobin-based oxygen carrier

K. F. WASCHKE, MD, D. M. ALBRECHT, MD, K. VAN ACKERN, MD and W. KUSCHINSKY, MD

Department of Anaesthesiology, Faculty of Clinical Medicine Mannheim, University of Heidelberg Mannheim, Germany
Department of Physiology, University of Heidelberg Heidelberg, Germany

Address for correspondence: I. Physiologisches Institut, der Universität Heidelberg, Im Neuenheimer Feld 326, D-69120 Heidelberg, Germany

The effects of resuscitation fluids on the brain have been investigated in previous studies by global measurements of cerebral blood flow and metabolism. In this study we have examined the effects of a novel haemoglobin-based oxygen carrier on local cerebral blood flow (LCBF) and local cerebral glucose utilization (LCGU) after resuscitation from a volume-controlled haemorrhage of 30 min (3.0 ml/100 g body weight) with ultrapurified, polymerized, bovine haemoglobin (UPBHB). LCBF and LCGU were measured in 34 brain structures of conscious rats 2 h after resuscitation using quantitative iodo(14C) antipyrine and 2-(14C)-deoxy-D-glucose methods. The data were compared with a control group without haemorrhage and fluid resuscitation. In the haemorrhage group, LCBF increased after resuscitation by 12–56% in the different brain structures (mean 36%). LCGU changed less (0 to +18%, mean+9%). In the control group there was a close relationship between LCGU and LCBF (r = 0.95). After fluid resuscitation the relationship was preserved (r = 0.95), although it was reset at a higher ratio of LCBF to LCGU (P < 0.05). We conclude that fluid resuscitation of a 30 min volume-controlled haemorrhage using the haemoglobin based oxygen carrier, UPBHB, induced a moderate degree of heterogeneity in the resulting changes of LCGU and LCBF. Local disturbances of cerebral blood flow or metabolism were not observed.


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