Deterioration of conjunctival PO2 after CPR.
An 82-year-old man was resuscitated following cardiac arrest suffered outside the hospital. Conjunctival oxygenation (PcjO2), as measured by a conjunctival PO2 monitor, increased in the immediate post-resuscitation period (60 min) and neurologic status improved. The PcjO2 steadily declined over the next three hours. During the period of declining PcjO2, the systolic blood pressure tended to remain stable (104 mm Hg +/- 18), the arterial PO2 (PaO2) was greater than or equal to 103 mm Hg, and the PcjO2/PaO2 ratio initially increased, while the PcjO2/arterial oxygen content (CaO2) ratio and neurologic status declined. The rise and subsequent fall of PcjO2 in this patient paralleled the neurologic status and may be consistent with the cerebral reperfusion/hypoperfusion phenomena observed in experimental preparations of resuscitation from circulatory arrest.
D000368:Aged; D000369:Aged, 80 and over; D003228:Conjunctiva / Q000098:blood supply*; D006323:Heart Arrest / Q000628:therapy; D006801:Humans; D008297:Male; D008991:Monitoring, Physiologic / Q000379:methods; D010100:Oxygen / Q000032:analysis*; D010313:Partial Pressure; D012151:Resuscitation; D013997:Time Factors
D010100:Oxygen