Cerebral Arterial Air Embolism. 3 Cerebral Blood Flow After Decompression from Various Pressure Treatments

摘要

The primary objective of the study was to identify an optimum pressure for the treatment of cerebral arterial gas embolism. The original experimental design in the series hinged on the belief that the restoration of cerebral flow (CBF) could be assessed by autoradiographic measurements of blood flow. It would not, of course, differentiate between a primary failure of cerebral blood flow restoration and a secondary obstruction resulting from residual gas expanding on decompression. The repetitive measurement of the cortical evoked potential (CEP), however, would allow the recognition of either an absence of returning function or a deterioration of CEP associated with decompression. This was based on the assumption that a promptly restored cerebral blood flow will lead to a return of function as indicated by CEP. The findings reported here come from 74 dogs, most of which were embolized and then treated at pressure. The events beginning with the start of decompression from the treatment depth and finishing with the cerebral blood flow study at surface pressure about 30 min from embolization are described. The 12 dogs that had been subjected to control dives before embolization were included, but observations were stopped at 30 min without the blood flow study. Originator supplied keywords include: Recompression; Hyperbaric oxygen; Decompression sickness, Bubbles; Cerebrospinal.