AIM : The objective is to determine the validity of bispectral index in diagnosis of mild and moderate head injury keeping GCS as a gold standard. Material and

Methods:This study includes minimum of 137 patients. At the time of admission, Glasgow coma score(GCS) was calculated by 3 different anaesthesiologist and mean was calculated. At the same time BIS reading was taken using Aspect BIS monitor.

Results: Mean age of the patients was 29.5 ± 6.2. 108 (78.8%) patients were male while 29 (29.2%) patients were female. Mean GCS was 12.2 ± 0.9 and mean bispectral index score was 69.9 ± 8.4. A comparison was made between GCS and BIS. Sensitivity was found to be 95.65%, specificity 98.53%, positive predictive value 98.50% and negative predictive value 95.7%. ROC curve was drawn and demonstrated area under curve value of 0.999.

Conclusion: BIS monitor was found to be a useful adjunct in the diagnosis and management of mild and moderate head injury patients in the intensive care units.