Suspected cerebrovascular air embolism during endoscopic esophageal varices ligation under sedation with fatal outcome: A case report

Figure 1 Anesthetic records.

Figure 2 Computed tomography perfusion. A: The right hemisphere mean transit time (arrow); B: The right hemisphere mean transit time to peak were prolonged (arrow). The cerebral blood flow was slightly decreased in some areas.

Figure 3 The magnetic resonance imaging. A, B and C: Bilateral frontal and parietal lobes, right occipital lobe, and right cerebellar hemisphere, with long T1 and T2 signals and restricted diffusion on diffusion-weighted magnetic resonance imaging (MRI) (arrows); D: High signals in the above areas on fluid attenuated inversion recovery MRI (arrows).

Figure 4 SedLine.

Figure 5 Electroencephalography waveform.

Figure 6 Electroencephalography traces from different levels of sedation. A: Wakefulness; B: Light general anesthesia; C: Deeper general anesthesia; D: Burst suppressed.