Investigation used for CSF rhinorrhoea are all except
CT cisternogram
Skull X-ray
beta2 transferrin
Nasal endoscopy
Advanced nasal endoscopic techniques can be used for CSF leak repair but not for investigation. CT cisternogram requires intrathecal injection of iohexol and a CT scan to localize the site. b 2 transferrin proteindetection by electrophoresis is asensitive and specific test for CSF.
FMGE 2019