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Ann Thorac Surg 1997;63:1326-1332
© 1997 The Society of Thoracic Surgeons

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Original Article: Cardiovascular

Perfluorocarbon Emulsion in the Cardiopulmonary Bypass Prime Reduces Neurologic Injury

Division of Cardiothoracic Surgery, Department of Surgery, and Division of Cardiac Anesthesiology, Department of Anesthesiology, University of Washington, Seattle, Washington

Accepted for publication November 27, 1996.

Background. Perfluorocarbon emulsion has proved beneficial in the prevention and amelioration of experimental air embolism. We examined whether the addition of perfluorocarbon to the prime solution could lead to a reduction in the incidence and severity of neurologic injury after the formation of a massive air embolism during cardiopulmonary bypass.

Methods. Fourteen pigs underwent bypass in which either a crystalloid prime solution or a perfluorocarbon prime solution (10 mL/kg) was used. Ten minutes into bypass a bolus (5 mL/kg) of air or saline (control) was delivered via the carotid artery. The resulting cerebral infarcts were graded on the basis of the findings in triphenyltetrazolium chloride–stained cerebral sections. Colored microspheres were used to measure cerebral blood flow. Bitemporal electroencephalography was used to evaluate cerebral function.

Results. Cerebral infarction was not found in the perfluorocarbon-air group (0 of 5 animals), as compared with its occurrence in 3 of the 5 animals in the crystalloid-air group. Cerebral blood flow was also maintained or increased in the perfluorocarbon-air group (p < 0.05), and the electroencephalogram total power showed less of a decrease and recovered more completely (p < 0.05) than it did in the crystalloid-air group.

Conclusions. The addition of perfluorocarbon emulsion to the cardiopulmonary bypass prime solution leads to a reduction in the incidence and severity of neurologic injury after the formation of a massive air embolism during bypass.

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