Artery superior mesenteric

Superior mesenteric artery syndrome Enteric infections Inflammatory bowel diseases Pancreatitis Appendicitis Cholecystitis Biliary colic Gastroparesis Postvagotomy syndrome Intestinal pseudo-obstruction Functional dyspepsia Gastroesophageal reflux Peptic ulcer disease Hepatitis Peritonitis Gastric malignancy Liver failure... 

Simonsen s group has performed some elegant work over the years on NO release characteristics from rat superior mesenteric artery. Initially, Simonsen s group simultaneously monitored artery relaxation and NO concentration in the artery using a NO microsensor in response to various drugs [120], NO concentration was monitored via an ISONOP30 electrode, purchased from WPI and inserted into the artery lumen using... 

FIGURE 1.7 Simultaneous measurements of force (upper traces) and NO concentration (lower traces) in an endothelium intact (+E) segment of rat superior mesenteric artery contracted with 0.5 J,M noradrenaline (NA) and relaxed with either 10pM acetylcholine (ACh) (a), or 10 pM SNAP (b). Panel C shows a similar measurement in the rat superior mesenteric artery after mechanical endothelial cell removal. As can be seen in C, ACh addition does not cause NO production from the artery but shows an NO increase upon SNAP addition causing artery relaxation. W = washout. (Reprinted with permission from Blackwell Publishing [120].)... 

U. Simonsen, R.W. Wadsworth, N.H. Buus, and M.J. Mulvany, In vitro simultaneous measurements of relaxation and nitric oxide concentration in rat superior mesenteric artery. J. Physiol.-London 516, 271-282 (1999). 

R. Hernanz, M.J. Alonso, H. Zibrandtsen, Y. Alvarez, M. Salaices, and U. Simonsen, Measurements of nitric oxide concentration and hyporeactivity in rat superior mesenteric artery exposed to endotoxin. Cardiovasc. Res. 62, 202-211 (2004). 

Blood is supplied to the jejunum and ileum via the superior mesenteric artery arising from the aorta. Venous blood returns to the superior mesenteric vein, which combines with the splenic vein to form the portal vein. Thus drugs absorbed through these parts pass initially through the liver. 

The visceral vessels are evaluated for patency because the required coverage of the inferior mesenteric artery mandates that blood supply to the viscera be adequate from other sources (celiac and superior mesenteric arteries). With experience, some of these contraindications can be overcome with suprarenal attachment devices, additional cuffs, and limbs, but for the nascent EVAR physician the contraindications should be acknowledged and adherence to the fundamental principles of endovascular device implantation will permit good outcomes. 

Ghisdal, P., and Morel, N. 2001. Cellular target of voltage and calcium-dependent K+ channel blockers involved in EDHF-mediated responses in rat superior mesenteric artery. Br. J. Pharmacol. 134 1021-1028. 

McCulloch, A.I., Bottrill, F.E., Randall, M.D., Hiley, C.R. (1997). Characterization and modulation of EDHF-mediated relaxations in the rat isolated superior mesenteric arterial bed. Br. J. Pharmacol. 120 1431-8. 

Drug administration into the superior mesenteric artery... 

Finally, Fg is derived experimentally from peripheral venous plasma concentrations after dosing to the hepatic portal vein and the superior mesenteric artery, respectively, according to Equation 12.4 ... 

Adaramoye, O. A. Medeiros, I. A., Endothehmn-independent vasodilation induced by kolaviron, a biflavonoid complex from Garcinia kola seeds, in rat superior mesenteric arteries, J. Smooth Muscle Res., 2009, 45, 39-53. 

The characteristic finding of midgut volvulus in the US examination is the whirlpool sign produced by the twisting of the bowel, mesentery, and superior mesenteric vein around the axis of the superior mesenteric artery (Fig. 1.13). The whirlpool sign, proposed by Pracros et al. (1992), directly indicates the anatomic alteration caused by midgut volvulus. The SM V and tributaries wrap around the SMA as a result of the volvulus, resulting in a partial or com-... 

Deeg KH, Rupprecht T, Schmid E (1993) Doppler sonographic detection of increased flow velocities in the celiac trunk and superior mesenteric artery in infants with necrotizing enterocolitis. Pediatr Radiol 23 578-582 del Pozo G (2005) Intussusception still work in progress. Pediatr Radiol 35 92-94... 

Smet MH, Marchal G, Ceulemans R et al (1991) The solitary hyperdynamic pulsating superior mesenteric artery an additional dynamic sonographic feature of midgut volvulus. Pediatr Radiol 21 156-157 Smink DS, Finkelstein JA, Kleinman K et al (2004) The effect of hospital volume of pediatric appendectomies on the misdiagnosis of appendicitis in children. Pediatrics 113 (1 Pt l) 18-23... 

Swischuk LE, Stansberry SD (1991) Ultrasonographic detection of free peritoneal fluid in uncomplicated intussusception. Pediatr Radiol 21 350-351 Sze RW, Guillerman RP, Krauter D et al (2002) A possible new ancillary sign for diagnosing midgut volvulus the truncated superior mesenteric artery. J Ultrasound Med 21 477-480... 

The duodenum is typically divided into four portions. The first portion is relatively mobile in contrast to the rest of the duodenum which is fixed in the retroperitoneal cavity. The second descending portion of the duodenum is in close contact with the pancreas and receives the common bile duct and duct of Wirsung in its midportion. The third portion is horizontally oriented and is ventrally crossed by the superior mesenteric artery (SMA) and superior mesenteric vein (SMV). The fourth ascending portion will turn ventrally to the duodenojejunal junction, which is additionally held in place by the ligament of Treitz. 

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