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International Journal of Colorectal... Mar 2013
Topics: Adult; Aged; Female; Humans; Hyperplasia; Laparotomy; Male; Mesenteric Veins; Radiography; Tunica Intima
PubMed: 22562259
DOI: 10.1007/s00384-012-1480-0 -
European Journal of Vascular and... Apr 2024
Topics: Humans; Mesenteric Veins; Mesenteric Ischemia; Mesenteric Vascular Occlusion; Thrombosis
PubMed: 37926148
DOI: 10.1016/j.ejvs.2023.11.004 -
Acta Physiologica Scandinavica Mar 1985Contractile responses to electrical field stimulation of excised small mesenteric arteries and veins of the rat were compared when stimuli were delivered in irregular... (Comparative Study)
Comparative Study
Contractile responses to electrical field stimulation of excised small mesenteric arteries and veins of the rat were compared when stimuli were delivered in irregular bursts or at regular intervals. Spontaneously occurring skin vasoconstrictor impulses in a few-unit median nerve recording in man were stored on tape and used to trigger a stimulator. Two irregular stimulation sequences at average frequencies of 1.6 and 1.8 Hz, respectively, were used. In the arteries, average contractile responses were significantly greater at an irregular than at an even stimulation frequency, but in the veins, similar degrees of contraction were obtained with the two modes of stimulation. The frequency-response relationships to continuous regular stimulation showed the artery to respond less than the vein at low frequencies. This apparently explains the differences in behaviour between the vessels to irregular stimulation. The results show that not only the number of impulses, but also their pattern of occurrence, may influence the degree of vasoconstriction. Thus, the normal irregular sympathetic discharge pattern in itself has a bearing on the physiology of neuro-effector control mechanisms.
Topics: Animals; Electric Stimulation; Male; Mesenteric Arteries; Mesenteric Veins; Rats; Rats, Inbred Strains; Sympathetic Nervous System; Synaptic Transmission; Vasoconstriction; Vasomotor System
PubMed: 2998156
DOI: 10.1111/j.1748-1716.1985.tb07592.x -
Chinese Medical Journal May 1978
Topics: Humans; Mesenteric Veins; Suture Techniques; Vena Cava, Inferior
PubMed: 98304
DOI: No ID Found -
The American Journal of Roentgenology,... Jul 1961
Topics: Angiography; Fluoroscopy; Humans; Mesenteric Arteries; Mesenteric Veins
PubMed: 13766705
DOI: No ID Found -
ANZ Journal of Surgery Mar 2024
Topics: Humans; Mesenteric Veins; Hyperplasia; Colon; Biopsy
PubMed: 38010844
DOI: 10.1111/ans.18788 -
Anesthesiology Dec 1990Potent inhalational anesthetics depress autonomic reflex responses at multiple sites. Most studies emphasize cardiac chronotropic changes and changes in systemic blood...
Potent inhalational anesthetics depress autonomic reflex responses at multiple sites. Most studies emphasize cardiac chronotropic changes and changes in systemic blood pressure. Recently, active reflex venoconstriction of 500-1,000 microns O.D. mesenteric veins has been demonstrated. In the current study, the effects of halothane on the reflex responses of similar mesenteric veins were measured. Mesenteric vein diameter and intravenous pressure were measured in 500-1,000 microns O.D. veins from the mesentery of segments of terminal ileum externalized in situ from 27 New Zealand white rabbits anesthetized with alpha-chloralose. Mean arterial pressure was measured with femoral arterial cannulation, and heart rate was determined from the arterial pressure signal. In a separate group of six animals, sympathetic efferent nerve activity was measured from a postganglionic splanchnic nerve. Reflex venoconstriction and increases in mean arterial pressure and mesenteric vein pressure in response to bilateral carotid occlusion were attenuated by 0.5% and 1% inhaled halothane but not by superfusate equilibrated with 3% halothane. Decreases in mesenteric vein diameter and increases in mesenteric vein pressure in response to celiac ganglion stimulation were unaffected by both 0.5% inhaled halothane and superfusate equilibrated with 5% halothane. The bilateral carotid occlusion reflex-mediated increase in sympathetic efferent nerve activity was depressed by both 0.5% and 1% inhaled halothane. The effect of inhaled halothane on prestimulation baseline vein diameter was inconsistent. Superfusate equilibrated with 5% but not 3% halothane caused baseline venodilation. These results suggest a mechanism whereby control of venous tone is inhibited by halothane proximal to the postganglionic neuron. This could involve central or ganglionic inhibition.
Topics: Animals; Halothane; Mesenteric Veins; Muscle, Smooth, Vascular; Rabbits; Reflex; Vasoconstriction
PubMed: 2248394
DOI: 10.1097/00000542-199012000-00015 -
Surgery Today 1993Iatrogenic arteriovenous fistula of the superior mesenteric vessels is rare, with only 22 cases being documented. We report herein a case of a 63-year-old man with an... (Review)
Review
Iatrogenic arteriovenous fistula of the superior mesenteric vessels is rare, with only 22 cases being documented. We report herein a case of a 63-year-old man with an iatrogenic arteriovenous fistula which developed after a small bowel resection for intestinal tuberculosis. The patient was admitted to our hospital for a gastric ulcer, at which time an ultrasonogram demonstrated cystic dilatation of the superior mesenteric vein, proving to be an arteriovenous fistula of the mesenteric vessels. An angiogram of the superior mesenteric vessels subsequently confirmed this diagnosis and resection of the fistula was performed, followed by an uneventful recovery. Iatrogenic mesenteric arteriovenous fistula with no presenting symptoms, as in our case, is uncommon and surgery performed before the development of associated portal hypertension should achieve good results. A review of the literature follows the report of this case.
Topics: Arteriovenous Fistula; Humans; Iatrogenic Disease; Male; Mesenteric Artery, Superior; Mesenteric Veins; Middle Aged; Postoperative Complications; Radiography
PubMed: 8461609
DOI: 10.1007/BF00309004 -
The Japanese Journal of Physiology 1979Behavior of the mesenteric and femoral veins was studied in rabbits during an arterial pressure oscillation elicited by a method that we call the "side pressure exertion...
Behavior of the mesenteric and femoral veins was studied in rabbits during an arterial pressure oscillation elicited by a method that we call the "side pressure exertion experiment." A segment of the mesenteric or femoral vein with intact innervation was vascularly isolated and was perfused under an isovolumetric condition. The force of the isovolumetric constriction of the segments was recorded in terms of the intrasegmental pressure duirng arterial pressure oscillation. The intrasegmental pressure of the superior mesenteric vein indicated an alternation of marked rise and fall during the oscillation. On the other hand, the response of the femoral segment during oscillation was less phasic but was better maintained at the higher range of initial pressures than that of the superior mesenteric segment. Simultaneously with the maximum rise of systemic arterial pressure, maximum elevation by 6.1, 6.1 and 6.4 mmHg was obtained in the mesenteric vein segment at initial intrasegmental pressures of 6, 10 and 14 mmHg, respectively. In the same circumstances, the femoral vein segment indicated a maximum rise of 8.1 to 9.3 mmHg at initial pressures of 10, 18, 26 and 34 mmHg. It can be concluded that there are marked differences between the mesenteric and femoral segments in behavior during systemic arterial oscillation and in the range of bearable intrasegmental pressure. The characteristics of the two veins might be related to the difference of specific circumstances in which the respective veins send blood back to the heart.
Topics: Animals; Blood Pressure; Blood Volume; Female; Femoral Vein; In Vitro Techniques; Male; Mesenteric Veins; Oscillometry; Perfusion; Rabbits; Regional Blood Flow; Vasoconstriction
PubMed: 541901
DOI: 10.2170/jjphysiol.29.767 -
Medicine Oct 2022The incidence of portal and mesenteric venous calcifications in patients with cirrhosis has rarely been reported. It is also very difficult to determine the vascular...
RATIONALE
The incidence of portal and mesenteric venous calcifications in patients with cirrhosis has rarely been reported. It is also very difficult to determine the vascular lesions in preoperative imaging examination. The liver cirrhosis patients associated with portal venous calcification have high postoperative complications and mortality, but poor prognosis.
PATIENT CONCERNS
We present a patient (45-year-old male), who was admitted to the hospital with liver cirrhosis and portal hypertension associated symptoms.
DIAGNOSES
Abdominal imaging computed tomography confirmed the presence of calcification in the portal vein system.
INTERVENTIONS
The patient underwent allogeneic liver transplantation.
OUTCOMES
The patient died 2 days after liver transplantation.
LESSONS
Calcification in the portal vein system is extremely rare, and always occurs in patients with long-standing liver cirrhosis with portal hypertension gastroesophageal varices and splenomegaly. The presence of portal vein calcification on computed tomography may be a sign of portal vein thrombosis, which may result in a difficult transplantation, and poor prognosis.
Topics: Calcinosis; Esophageal and Gastric Varices; Humans; Hypertension, Portal; Liver Cirrhosis; Male; Mesenteric Veins; Middle Aged; Portal Vein
PubMed: 36221353
DOI: 10.1097/MD.0000000000030766