<prompt> All true about accidental intraerial injection of thiopentone except-Immediate intense vasoconstriction and excruciating painCause is precipitation of thiopental crystalls in the aerial vesselsTo relieve pain we have to immediately remove the misplaced aerial cannulaStellate ganglion block is one of the treatment modality  <response>: The accidental intraerial injection of drug by wrongly placed cannula MN- 1 Leave the cannula 2 Intraerial injection of heparin 3 Lidocaine, papaverine, phenoxybenzamine injected 4 Stellate ganglion block 