Functional myelography with metrizamide in the diagnosis of lumbar spinal stenosis.

Metrizamide (Amipaque) as a contrast medium for functional lumbar myelography was evaluated in 63 patients. It was found well suited, the adverse effects being insignificant. Good correlation was found between the clinical and the myelographic diagnosis. An a.p. diameter in extension of less than 8 to 10 mm (true value 5.5-7.0 mm) was found only in patients with considerable complaints and in whom operation was indicated.