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Arginine vasopressin reduces cerebral oxygenation and cerebral blood volume during intact circulation in swine – a near infrared spectroscopy study

Published online by Cambridge University Press:  13 April 2005

B. Bein
Affiliation:
University Hospital Schleswig-Holstein, Department of Anaesthesiology and Intensive Care Medicine, Campus Kiel, Germany
E. Cavus
Affiliation:
University Hospital Schleswig-Holstein, Department of Anaesthesiology and Intensive Care Medicine, Campus Kiel, Germany
V. Dörges
Affiliation:
University Hospital Schleswig-Holstein, Department of Anaesthesiology and Intensive Care Medicine, Campus Kiel, Germany
K.-H. Stadlbauer
Affiliation:
Leopold-Franzens University, Department of Anaesthesiology and Intensive Care Medicine, Innsbruck, Austria
P. H. Tonner
Affiliation:
University Hospital Schleswig-Holstein, Department of Anaesthesiology and Intensive Care Medicine, Campus Kiel, Germany
M. Steinfath
Affiliation:
University Hospital Schleswig-Holstein, Department of Anaesthesiology and Intensive Care Medicine, Campus Kiel, Germany
J. Scholz
Affiliation:
University Hospital Schleswig-Holstein, Department of Anaesthesiology and Intensive Care Medicine, Campus Kiel, Germany
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Extract

Summary

Background and objective: The aim of the present study was to investigate the impact of arginine vasopressin (AVP), a drug currently under investigation for use during cardiopulmonary resuscitation, on cerebral oxygenation and cerebral blood volume (CBV) in pigs with intact systemic circulation using near infrared spectroscopy.

Methods: Nine healthy pigs were anaesthetized and subjected to invasive haemodynamic monitoring as well as to non-invasive determination (with near infrared spectroscopy) of changes in the Tissue Oxygenation Index (TOI is the ratio of oxygenated to total tissue haemoglobin), Tissue Haemoglobin Index (THI, representing CBV) and cytochrome oxidase (ΔCytOx, representing the balance of intracellular oxygen supply).

Results: At both 3 and 5 min after AVP administration, TOI, THI and ΔCytOx were significantly (P < 0.001) reduced compared to baseline, while cerebral perfusion pressure increased significantly (P < 0.001). The effects of AVP on TOI and THI lasted longer than on ΔCytOx. There were no significant changes with respect to the intracranial pressure throughout the study period.

Conclusions: No improvement of cerebral oxygenation was detected after AVP administration in swine with an intact systemic circulation. In contrast to recently published investigations, AVP provoked a sustained drop in indices of cerebral oxygenation and CBV.

Type
Original Article
Copyright
© 2005 European Society of Anaesthesiology

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