<prompt> Following accidental intra aerial injection of thipentone which should not be doneRemove the needleIntra aerial heparinIntra aerial papaverineDo a stellate ganglion block  <response>: Ref Ajay yadav 2e p 73 Treatment of accidental intra aerial injection of thipentone is Immediately stop fuher injection Leave the needle at site Inject heparin through this needle Inject papaverine through this needle If vasodilators like papaverine are not available ,xylocaine can be used Brachial plexus or stellate gangling block should be done to relieve vasospasm 