No abstract

Some cases of esophageal atresia, either with or without tracheoesophageal fistula, are not suited for primary anastomosis. To avert the need for colon interposition in two such infants, intermittent electromagnetic force was used to pull together "bullets" placed in the esophageal ends. This method elongated and enlarged the esophageal segments enough to accomplish their anastomosis later. This approach appears feasible to use for infants whose esophageal malformation does not permit primary repair. It may also be applicable to cases of imperforate anus with a hight pouch.

✓ An improved magnetically-guided intravascular catheter system in dogs is described as safe, requiring little attention, allowing the application of flow surges to aid propulsion of the tip, and providing for angiography of good quality. Current concepts of the relationship of magnetic and flow guidance are discussed. The uses of the system demonstrated include selective angiography, perfusion of isobutyl-2-cyanoacrylate into experimental arteriovenous fistulas, and perfusion of microparticulate iron suspensions into experimental aneurysms. A unique detachable macroballoon that may function as a reversible tethered embolus is reported.