Anaesthesia in an unconscious patient

Das 25 years , Unconscious since 23 days following road traffic accident, GCS 8-9, CT scan does not show any definite pathology like blood, midline shift, Clinically patient is stable vitals, spontaneouly breathing , On ryles tube feeding, Neurologically the patient had increased muscle tone in  limb muscles like UMN disease.No convulsion. Needed opeartion for # shaft of femur and Tibial head. A spinal anaesthesia was adminstered at L-3-4 interspace  with sensorcaine 3 ml and appropriate positioning for minimal fall in BP
The spinal fluid was discolored  some what deep straw colored but no increased pressure.
Intra operatively a small dose of thiopentone was given to reduce the muscle tone and Oxygen by mak

The intra operative period was uneventful ..