Source of Support: None, Conflict of Interest: None
Sir Walter Dandy in 1918 recognised the importance of water soluble media for contrast neuroradiography, he used air contrast in his pioneering work (Ferguson 1974). During the years that followed, poppy seed oil (Lipoidol), water soluble colloidal thorium dioxide (Thorotrast) and sodium iodomethane sulfonate (an organoiodine compound) were employed by various workers for myelographies. Most of these studies however were accompanied by moderate to severe degrees of reactions (Shaprio 1968, Ferguson 1974). The search for a better contrast medium for myelography is still on. The perfect myelographic contrast medium should be a liquid of low viscosity, miscible with cebrospinal fluid and capable of filling all the subarachnoid space and the ventricles. It should be sufficiently radio-opaque, yet not so opaque as to obscure details of nerve roots (Harvey and Freiberger 1965). Reports have appeared in the literature on the use of Conray a water soluble contrast medium (meglumine iothalamate) for myelography since 1964 with varying degree of success (Davis et al. 1968, Praestholm and Lester 1970). The present study was undertaken to evaluate the use of Country in compression of the cord.