No abstract available.
Embolism ; Mesenteric Arteries ; Mesenteric Artery, Superior

No abstract available.
Embolism ; Mesenteric Arteries ; Mesenteric Artery, Superior

Incorporation of laparoscopic techniques into the gastrointestinal surgeon's armamentarium has led to a renewal of interest in the anatomy of mesenteric arteries because hemorrhagic complications can be a major cause of conversion and/or morbidity during laparoscopic intestinal surgery. BACKGROUND: Since a colonic resection with laparoscopic techniques has become a common procedure, the limited exposure currently provided in laparoscopic intestinal resection demands a precise knowledge of mesenteric vascular anatomy to avoid such complications and to expedite the procedure. Historically, It was thought that the arterial supply to the right colon consisted of three arterial branches (middle colic artery, right colic artery, ileocolic artery) arising independently from the superior mesenteric artery (SMA). However, on recent reports and clinical observations, two colonic arteries only arising independently from the SMA are more common than three colonic arteries. METHODS: We reviewed 40 cases of angiography which focused on the SMA and it's branches. RESULTS: We found the ileocolic artery in 39 of 40 cases, the middle colic artery in 39 of 40, and the right colic artery in 19 of 40. Based on the existence of the right colic artery in our review, about half (47.5%) of the cases had a right colic artery directly arising from this SMA. CONCLUSION: This knowledge may help lower the risk of vascular complications during laparoscopic intestinal surgery.
Angiography* ; Arteries* ; Colic ; Colon* ; Mesenteric Arteries ; Mesenteric Artery, Superior*

No abstract available.
Atrial Fibrillation ; Mesenteric Arteries ; Mesenteric Artery, Superior ; Stroke

Aneurysm of the superior mesenteric artery is rare, accounting for about 8% of visceral arterial aneurysms ;60% of all such the aneurysms of the superior mesenteric artery. We report a case of mycotic aneurysm of thesuperior mesenteric artery whcih on US, CT and angiography, showed typical findings.
Aneurysm ; Aneurysm, Infected* ; Angiography ; Mesenteric Arteries ; Mesenteric Artery, Superior*

The treatment of a thoracic aortic dissection is guided by prognostic and anatomical information. Stanford type A aortic dissection requires surgery, but the appropriate treatment of a Stanford type B aortic dissection has not been determined, especially in patients with visceral artery compromise associated with the aortic dissection due to the failure of surgery to improve the prognosis.We report a case of a 35-year-old man, with a Stanford type B aortic dissection, where the superior mesenteric artery was obstructed. This condition was successfully treated with stents inserted at the origin of the artery.
Adult ; Arteries* ; Humans ; Mesenteric Artery, Superior* ; Stents*

A through knowledge of the anatomy of colonic mesenteric arteries is necessary to accomplish successful, uncomplicated abdominal operations, especially laparoscopic colonic resections in which the mesenteric vessels can't be palpated. Such knowledge is also important when performing a colonic resection for cancer using proximal vascular ligation and wide en bloc resection. Most surgical textbooks depict a "normal pattern" of arterial supply to the right colon as consisting of three arterial branches (the ileocolic, the right colic, and the middle colic arteries) arising independently from the superior mesenteric artery (SMA). Based on the literature, there are only two colonic arteries arising independently from the SMA in many cases. We examined the anatomy of these arteries in 50 patients who had had SMA angiographies for various diseases from January 1995 to May 1997. In all of our cases, the ileocolic artery and the middle colicartery emanated directly from the SMA, but the right colic artery originated directly from the SMA in only 54% of the cases. The right colic artery was absent in 8% of the cases. It also arose as a single trunk with the middle colic artery (22% of the cases) and from the ileocolic artery (16% of the cases). Our data, together with published anatomic studies, lead us to conclude that in many cases there are only two independent branches arising from the SMA that supply the large intestine, the ileocolic artery and the middle colic artery. This knowledge may be helpful in laparoscopic colon surgery, radical colon resections for cancer, and colon replacements after operations on the esophagus or the urinary bladder.
Angiography ; Arteries* ; Colic* ; Colon ; Esophagus ; Humans ; Intestine, Large ; Ligation ; Mesenteric Arteries ; Mesenteric Artery, Superior ; Urinary Bladder

OBJECTIVE: This study was conducted to investigate the relationship between invasive treatments and computed tomographic (CT) classification or findings in symptomatic spontaneous isolated superior mesenteric artery dissection (SISMAD). METHODS: This retrospective observational study included 30 patients with SISMAD from Jan 2012 to Dec 2016. Demographic data, risk factor, treatment modalities, and CT findings including morphological classification, dissection length, and true lumen relative diameter (TLRD) were reviewed. The enrolled patients were classified into two groups (conservative management group, CG; invasive management group, IG). RESULTS: Based on CT classifications, one patient was type I (CG, n=1; IG, n=0), two were type IIa (CG, n=2; IG, n=0), five were type IIIa (CG, n=5; IG, n=0), 10 were type IIIb (CG, n=9; IG, n=1), and 12 were type IIIc (CG, n=1; IG, n=11). There was a high tendency to undergo invasive treatment among type IIIc (P < 0.001). The TLRD, distance from the aorta to dissection point, and dissection length were 18.3% (range, 0%–29.8%), 1.7 cm (range, 0–3.5 cm), and 7.3 cm (range, 4.9–10.0 cm), respectively. There TLRD (CG, 26.8% [range, 22.2%–48.8%]; IG, 0%; P < 0.001) and distance from the aorta to dissection point (CG, 1.0 cm [range, 0–2.1 cm]; IG, 3.5 cm [range, 0.8–5.4 cm]; P=0.024) differed significantly between groups. However, there was no significant difference in dissection length between CG and IG (P=0.527). CONCLUSION: The TLRD, distance from the aorta to dissection point, and CT classification such as type IIIc were associated with invasive management. Further studies on extended natural course of the disease from a larger number of subjects are necessary to draw a strong conclusion.
Abdominal Pain ; Aorta ; Classification ; Humans ; Mesenteric Arteries ; Mesenteric Artery, Superior* ; Mesenteric Ischemia ; Observational Study ; Retrospective Studies ; Risk Factors

We recently encountered a case of posttraumatic SMAVF(Superior mesenteric arteriovenous fistula), which has treated by coil embolization. He had history of stab wound and emergent operation. Operative diagnosis was gastric perforation and mesenteric laceration which was simply repaired. After history of abdominal stab woung and operation, he developed palpitation and thrill in left upper abdomen. Recentrly he have experienced syncope twice. On superior mesenteric arteriogram, early visualiation of superior mesenteric vein and portal vein was noted. We embolized the SMAVF by using coils. Since coil embolization, palpitation and thrill disappreared.
Abdomen ; Diagnosis ; Embolization, Therapeutic* ; Fistula* ; Lacerations ; Mesenteric Arteries ; Mesenteric Veins ; Portal Vein ; Syncope ; Wounds, Stab

PURPOSE: Contrast-enhanced 3-D ultrafast MR angiography is a widely accepted MR imaging technique for theevaluation of the carotid artery, aorta, renal artery, mesenteric artery and portal venous system. To esti-mateitsclinical usefulness, single -and double- dose contrast-enhanced 3-D ultrafast pulmonary MR angiography wasassessed after a timing examination was performed. MATERIALS AND METHODS: Twenty volunteers underwentgadolinium-enhanced ultrafast pulmonary MR angiog-raphy( 3-D FISP, TR[msec]/TE[msec]=5.0/2.0, with 25 degrees flipangle). In ten volunteers(single-dose injection group) pulmonary MR angiography was performed after theadminstration of 0.1 mmol/kg(single dose injec-tion group), while the other ten(double-dose injection group) eachreceived, prior to angiography, 0.2 m m o l / kg. In all cases, a timing examination was performed during axialturbo-FLASH imaging(TR/TE/TI=8.5/4.0/100, 1 0 degree flip angle) after injection of the same dose as that used forsubsequent contrast-enhanced pulmonary MR angiography. In both groups, overall image quality, pulmonary arteryvisibility and contrast-to-noise ratio of the pulmonary artery were assessed on the basis of images obtained.RESULTS: With regard to overall image quality, there was no significant statistical difference between the twogroups (P>0.05), and in both, depiction of the central and lobar pulmonary artery was excellent. As regardsdepiction of the segmental artery, the average grading of the single dose injection group was 2.83 +/- 0.32, that ofthe double dose injection group was 2.85 +/-0.3, with no statistical significance(P>0.05). With respect tocon-trast-to-noise ratio of the central, lobar, and segmental arteries, the best results were obtained by thedouble dose injection group(P<0.05). CONCLUSION: Although the contrast-to-noise ratio in the double-dose injectiongroup was better than that in the single-dose group, differences in overall image quality and pulmoanry arterydepiction were not statistically significant. Thus, single-dose, contrast-enhanced 3-D ultrafast pulmonary MRangiography can provide useful images in clinical trials.
Angiography* ; Aorta ; Arteries ; Carotid Arteries ; Magnetic Resonance Imaging ; Mesenteric Arteries ; Pulmonary Artery ; Renal Artery ; Volunteers