I open my hand and the blades close, neatly clipping the aneurysm. The aneurysm, defeated, shrivels since it is now no longer filling with high pressure arterial blood. I sigh deeply – I always do when the aneurysm is finally dealt with. But to my horror I find that this second applicator has an even more deadly fault than the first: having closed the clip over the aneurysm the applicator refuses to release the clip.