The subject of spontaneous aortocaval fistula due to a ruptured abdominal aortic aneurysm into the inferior vena cava is reviewed and discussed. An interesting case is presented with particular emphasis on the pre-operative findings which include lower body cyanosis; pain, numbness, and paralysis of the lower extremities; a cyanotic partial penile erection; and moderate shock. The cause of this syndrome is postulated.

Aged↗

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Loosely coupled coaxial TEM applicators for deep-heating.

The development of a coaxial TEM (transverse electromagnetic) deep-heating, non-contacting applicator employing two axially spaced concentric sleeves is described which has electrostatic characteristics and has been named the ESA. Thermal data obtained with the FDA/CDRH elliptic-shaped human torso phantom (with fat overlay) showed nearly uniform heating (+/- 10%) throughout the inner cross-section. Saline tank measurements on a torso cross-section confirmed similar SAR uniformity. Animal experiments with a pig, both with and without blood flow, verified deep-heating and suggested that some preferential central heating occurred. The absence of excessive surface heating indicated that the major portion of the E-field excitation is axially aligned. The non-contacting applicator does not require a water bolus, and experiments showed that moderate patient movement had minor effect on performance.

Animals↗