<prompt> The use of 5 dextrose as an intravenous resuscitation fluid canImprove cerebral perfusionProvide glucose substrate for cerebral metabolismReduce intracranial pressure and cause lacity of brainReduce serum osmalality and cause brain edema  <response>: 5 dextrose is a free water solution. Dextrose gets metabolised and plasma osmolality is decreased. This increases the brain oedema in head injury and hence should be avoided. 