Intramedullary pressure during endoscopy of the long bone: experimental results of a new endoscopic technique.

This study shows the local changes in intramedullary pressure during a new endoscopic technique for the medullary canal of the long bone. The procedure of intramedullary bone endoscopy (IBE) was performed on 4 tibial amputations. By slowly pushing the endoscope distally under visual control and endoscopic preparation of the medullary canal, a "neocavum" for endoscopy was created. During the procedure, the intramedullary pressure was continuously measured: Highest peak pressure was 125 mm Hg. We therefore conclude that the procedure of IBE is a safe intervention within the medullary canal of the long bone. Local or systemic side effects, common to intramedullary reaming in fracture treatment (fat-embolism, local bone necrosis, reduction in cortical blood flow) should not be expected.