The authors demonstrate that it is possible to identify the epidural space by an acoustic and visible signal. An experimental setup constructed for this purpose makes the epidural puncture procedure audible and visible.

A case of aneurysmatic dilatation of an aortic homograft 34 years after implantation for correction of a coarctation is presented. It was electively replaced by a Dacron prosthesis to prevent impending complications.

A Ao or rt to ob br ro on nc ch hi ia al l f fi is st tu ul la a a af ft te er r c co or rr re ec ct ti io on n o of f c co on ng ge en ni it ta al l c ca ar rd di io ov va as sc cu ul la ar r a ab bn no or rm ma al li it ti ie es s All patients presented with haemoptysis. Computed tomographic (CT) scan and aortography were inconclusive in two, diagnostic in one and not performed in another. Three patients underwent operation: all survived and are free of symptoms with a follow-up of 2-8 yrs. The fourth patient died before operation due to massive haemorrhage into the lung. In all patients, the fistula was secondary to aortic interposition of patch grafts.