Does intraosseous have to mean intramedullary?

Editor,—Further to Foex's historical note on the intraosseous route for fluid administration1 and Lavis's recommendations regarding its use in extreme circumstances in adults,2 we would like to mention our previously reported experience where use of an intracalcaneal infusion proved very successful in the resuscitation of a seriously ill child.3 In our opinion, this case questions the assumption that it is necessary to have a functioning medullary cavity in the bone where an intraosseous needle is used. Could it just be that a bone …