Research Reports - The relation between persistent coma and brain ischemia after severe brain injury

Int J Neurosci. 2013 Apr 30

Cheng Q, Wang J, Jiang B, Xi J, Li Z, Liu JF

Abstract Aim: To investigate the relation between brain ischemia and persistent
vegetative state after severe traumatic brain injury. Methods:The 66 patients
with severe brain injury were divided into two groups: The persistent coma group
(coma duration >10 days) included 51 patients who had an admission coma score of
5 to 7 and were unconscious for more than ten days. There were fifteen patients
in the control group, their admission GCS was 5 to 8, and were unconscious for
less than ten days. The brain areas, including frontal, parietal, temporal,
occipital lobes and thalamus, were measured by SPECT. Results: In the first SPECT
scan, multiple areas of cerebral ischemia were documented in all patients in both
groups, whereas bilateral thalamic ischemia were were presented in all patients
in the persistent coma group and was absented in the control group. In the second
SPECT scan taken during the period of analepsia, with an indication that
unilateral thalamic ischemia were persisted in 28 of 41 patients in persistent
coma group(28/41,68.29%). Conclusion: Persistent coma after severe brain injury
is associated with bilateral thalamic ischemia.

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