Suprainguinal fascia iliaca block: does it block the obturator nerve?

To the Editor, We read with interest the dose-finding study by Kantakam et al .[1][1] The authors examined the spread of injectate to the obturator nerve (ON) with a suprainguinal fascia iliaca compartment block (SIFIB). They observed that the minimum effective volume of dye in 90% of cadavers