Diagnostic technique for piriformis syndrome

FIELD: medicine. SUBSTANCE: sciatic nerve structure is scanned by B-mode ultrasound at the level of sub-piriform cavity and distally towards its bifurcation to tibial and common peroneal nerves, at emission frequency up to 17 MHz. If observing any signs of sciatic neuropathy at the level of sub-piriform cavity in the form of non-uniform thickness, which varies within the range of 0.2 to 0.4 cm, whereas it reaches 0.5 cm and more in the distal direction, the piriforms syndrome is diagnosed. EFFECT: technique enables the higher diagnostic accuracy of the piriforms syndrome by detecting the morphostructural changes of the sciatic nerve from the level of the piriform space up to its bifurcation. 4 ex