Ring-shaped variation of the coeliac trunk branches

Aberrant arterial variations in the branching pattern of the coeliac trunk are of great interest to surgeons and radiologists. We report on a rare arterial variation found in a 79-year-old cadaver during educational dissection. Specifically, the coeliac axis formed a unique incomplete trunk termed the hepato-hepatic trunk. The splenic artery arose separately from the anterior aspect of the abdominal aorta. On the right side, there was a right hepatic artery giving rise to a gastroduodenal but an absence of the left hepatic. On the left side, there was a branch coursing towards the porta hepatis; the left hepatic artery, dividing into the left gastric, an accessory left gastric, and a branch to the distal oesophagus. The hepato-hepatic trunk formed a ring-shaped vascular structure around the caudate lobe of the liver. Precise mapping and observation of the extrahepatic arteries and bile duct branches is essential in a variety of hepato-biliary laparoscopic procedures of the liver and gallbladder. Other operative procedures requiring, a comprehensive kno­wledge of the varied coeliac trunk patterns are liver transplantation and arterial embolism for hepatic tumour therapy

PC Plug-In Telemetry Decommutator Using FPGAS

International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, NevadaThis paper describes the design of a PC plug-in card that incorporates all functions of the base band segment of a PCM decommutator which includes the bit synchroniser (BS), frame synchroniser (FS) and subframe synchroniser (SFS). FPGAs are used for the realization of the digital sections of the circuit. The card is capable of handling all standard IRIG codes. The bit synchroniser can handle data rates upto 1Mbps (NRZL), while the frame and subframe synchronisers have been designed to work upto 10 Mbps.International Foundation for TelemeteringProceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection