Primary aortoenteric fistula: computed tomographic diagnosis of an atypical presentation.

A primary aortoenteric fistula is a potentially devastating complication of untreated aortic aneurysmal disease. The clinical presentation can be confusing, leading to a delay in diagnosis. Computed tomography (CT) can greatly assist in establishing the diagnosis.

Fasciotomy in vascular trauma: is it too much, too often?

Fasciotomy has been used as a prophylactic measure against development of compartment syndrome and as a treatment modality when the syndrome has developed in patients suffering vascular trauma. The hospital records of 36 patients who underwent surgical repair of their traumatic vascular injuries were reviewed. All 36 patients had at least one indication for fasciotomy at the time of repair; i.

X-ray Tomographic Study of Chemical Vapor Infiltration Processing of Ceramic Composites.

The fabrication of improved ceramic-matrix composites will require a better understanding of processing variables and how they control the development of the composite microstructure. Noninvasive, high-resolution methods of x-ray tomography have been used to measure the growth of silicon carbide in a woven Nicalon-fiber composite during chemical vapor infiltration. The high spatial resolution allows one to measure the densification within individual fiber tows and to follow the closure of macroscopic pores in situ.

Comparative effects of endothelin (ET-1) and U46619 on human saphenous vein and gastroepiploic artery, sources of human autologous grafts.

The effects of endothelin (ET-1) on smooth muscle contractile activity were investigated and compared in human saphenous vein and gastroepiploic artery, vessels frequently used in revascularization procedures. ET-1 contracted saphenous vein and gastroepiploic artery in a concentration-dependent manner. The peptide produced a greater maximal effect in the vein than in the artery and, in both preparations, ET-1 was less efficacious than U46619, an agent which mimics the actions of thromboxane A2 at the thromboxane A2/prostaglandin H2 receptor.

Differential recovery of prostacyclin and endothelium-derived relaxing factor after vascular injury.

Differential recovery of prostacyclin and endothelium-derived relaxing factor after vascular injury. Am. J.