Comparative volumes and vascular microanatomy of the intrahepatic venous system of the harbour porpoise, Phocoena phocoena (L.)

1978 ◽  
Vol 56 (11) ◽  
pp. 2292-2298 ◽  
Author(s):  
J. W. Hilton ◽  
D. E. Gaskin
Keyword(s):  
Vena Cava ◽  
Liver Weight ◽  
Harbour Porpoise ◽  
Venous System ◽  
Portal System ◽  
Hepatic Veins ◽  
Phocoena Phocoena ◽  
Diaphragmatic Muscle ◽  
Injection Techniques ◽  
Portal Veins

The intrahepatic venous systems of the harbour porpoise, Phocoena phocoena, were studied using single and double injection techniques. Large band-like formations of elastin fibres were found in the dilated terminal portions of the major hepatic veins and the adjacent section of the caudal vena cava but not in the equivalent major branches of the thicker walled portal veins. The hepatic venous system increases in volume disproportionately with increase in body length and liver weight; the portal system does not. No distal sphincter formations were found in the major hepatic veins, nor were sphincters or valves present in the portal system. The vena cava, however, is surrounded by a loop of diaphragmatic muscle or 'caval sling,' which may cause significant occlusion of the vena cava following inspiration. The distensible terminal portions of the major hepatic veins and the adjacent portion of the caudal vena cava could then function as a temporary blood reservoir or 'intrahepatic sinus.' While this would be a relatively inefficient mechanism for preventing ventricular engorgement, it might be sufficient for the needs of P. phocoena, which is a relatively poor diver.

Rencular morphology and renal vascular system of the harbour porpoise Phocoena phocoena (L.)

1979 ◽  
Vol 57 (4) ◽  
pp. 868-875 ◽  
Author(s):  
N. A. Hedges ◽  
D. E. Gaskin ◽  
G. J. D. Smith
Keyword(s):  
Body Weight ◽  
North Atlantic ◽  
Vascular System ◽  
Vascular Supply ◽  
Harbour Porpoise ◽  
Phocoena Phocoena ◽  
Parasympathetic Nerves ◽  
Injection Techniques ◽  
Renal Vascular

The kidneys of 35 harbour porpoises, Phocoena phocoena (L.), from the western North Atlantic were studied. Kidneys are large (0.84% of body weight) and multirenculate (approximately 300 renculi per kidney). Renculi have well developed medullary papillae (71–80% of rencular thickness) which correlates well with an ability to produce concentrated urine. Zonation of the vascular system within the medulla is also present, another characteristic of mammals producing concentrated urine.The intrarencular vascular supply is typically mammalian and similar to other cetaceans. As a result of excellent injection techniques, we found greater complexity and variability in the vascular system in our specimens than has been previously reported.Vascular control is discussed in relation to diving bradycardia. Parasympathetic nerves may stimulate vasodilation to quickly restore rencular circulation at the end of a dive.

scholarly journals Mesoatrial shunt in Budd-Chiari syndrome

2009 ◽  
Vol 66 (1) ◽  
pp. 69-73 ◽  
Author(s):  
Darko Mirkovic ◽  
Nebojsa Stankovic ◽  
Miodrag Jevtic ◽  
Miroslav Mitrovic ◽  
Milan Jovanovic
Keyword(s):  
Computed Tomography ◽  
Vena Cava ◽  
Factor V Leiden ◽  
Lower Limbs ◽  
Portal System ◽  
Hepatic Veins ◽  
Budd Chiari Syndrome ◽  
Factor V Leiden Mutation ◽  
Chiari Syndrome ◽  
The Right

Background. Budd-Chiari syndrome (BCS) represents partial or total occlusion of the hepatic veins with or without simultaneous obstruction of vena cava inferior (VCI). The symptoms of BCS are abdominal pain, hepatomegaly, ascites, varices of the abdominal wall, sometimes bleeding from the upper part of gastointestinal tract (GIT), lower limbs swelling and jaundice. Primary BSC is a relatively rare condition occurring in one per 100 000 of the population worldwide. Case report. A male patient, 25-year-old, facing tooth postextraction complications, was presented with acute BCS. On admission, physical examination revealed pale-grayish complexion, more pronounced veins over the thorax and abdomen, ascites, enlarged liver rising 8 cm below the right costal arch and having a minor pleural effusion by the right side. The patient was submitted to Doppler sonography and computed tomography (CT) that verified the right leg deep veins thrombosis, as well as the presence of a thrombus in the intrahepatic portion of the VCI. Multislice computed tomography (MSCT) showed occlusion of hepatic veins (Budd-Chiari syndrome) and thrombosis of the VCI in the retrohepatic part 6 cm long. Also, increased values of transaminases and gamma GT and reduced values of albumines and serum ferrum were registered. Molecular examination revealed Factor V Leiden mutation - heterozygote. After preoperative preparations a mesocaval shunt was made using Gore- Tex ring graft of 12 mm. Intraoperatively, the blue enlarged liver was found with almost black zones of tense capsule. After a graft making, liver congestion decreased followed by the change of colour and volume. Within postoperative course metabolic and synthetic liver functions were obvious. Conclusion. In patients with BCS medicamentous treatment does not yield adequate results, but even causes worsening of general condition. Surgical therapy in the presented patient was performed timely regarding the stage of the disease due to which irreversible liver changes were prevented while decompression of the portal system provided time overbridging up to liver transplantation.

Abstract 69: Evaluation Of Abdominal Blood Flow During Chest Compression In Cardiac Arrest Patients Using Enhanced Computed Tomography (CT)

Circulation ◽  
2007 ◽  
Vol 116 (suppl_16) ◽  
Author(s):  
Yasumasa Oode ◽  
Kentarou Shimizu ◽  
Asako Matsushima ◽  
Kentarou Kajino ◽  
Yuukou Nakagawa ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cardiac Arrest ◽  
Cardiopulmonary Resuscitation ◽  
Contrast Medium ◽  
Chest Compression ◽  
Femoral Vein ◽  
Vena Cava ◽  
Hepatic Veins ◽  
Chest Compressions ◽  
Portal Veins

Background: The mechanism of blood flow during chest compression in cardiac arrest patients remains under investigation. We often experience that cardiac arrest patients suffer severe diarrhea after successful cardiopulmonary resuscitation(CPR), which would be attributable to intestinal ischaemia during cardiac arrest and resuscitation. However, few studies have been made to evaluate abdominal blood flow during chest compression in cardiac arrest patients. Patients and Methods: The study was made in four patients immediately after termination of cardiopulmonary resuscitation. A 100ml bolus of 300 mgI/ml contrast medium was injected from a short femoral vein catheter, followed by continuous chest compression at a rate 100/min. In order to evaluate the distribution of contrast medium, CT images of the chest and abdomen were taken after 100 and/or 200 chest compressions, respectively. Results: CT scans showed similar enhance patterns in the patients. After 100 chest compressions, enhancement values were higher at inferior vena cava(IVC) regions compared to ascending aorta and main arteries. After 200 compressions, enhancement values of the arteries were increased by two to four times. However, significant enhancement of hepatic veins and limited enhancement of portal veins suggest impaired perfusion of the liver and the bowel. Conclusion: One hundred or 200 chest consecutive compressions are not sufficient to enhance abdominal organs including the liver and bowel. Figures: Typical MPR(Multiplanar reconstruction) images after 100compressions at two different coronal planes; hepatic vein and IVC(left), portal veins(right) are depicted.

scholarly journals Planning of the Autotransplantation of the Liver to the Patients with Advanced Alveococosis Based on the Multidetector Computed Tomography

2017 ◽  
pp. 123-131 ◽  
Author(s):  
A. N. Bashkov ◽  
S. E. Voskanyan ◽  
Z. V. Sheykh ◽  
G. G. Karmazanovsky ◽  
A. P. Dunaev ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Inferior Vena Cava ◽  
Multidetector Computed Tomography ◽  
Inferior Vena ◽  
Vena Cava ◽  
Pathological Process ◽  
Hepatic Veins ◽  
Portal Veins ◽  
Scan Data ◽  
The Right

Aim: to analize computed tomography data while planning autotransplantation of the liver for advanced alveococcosis.Materials and Methods.A retrospective analysis of the results of multidetector computed tomography of the abdomen and retroperitoneal space of 7 patients with advanced liver alveococcosis was made in order to plan autotransplantation. Besides a description of the location and size of parasitic lesion for each patient relationship with main vessels was evaluated - the inferior vena cava, hepatic and portal veins, hepatic arteries, and the presence of extrahepatic component. The vessel assessed as involved in the pathological process not only in case of clear invasion, but also with abutment because of infiltrative growth of alveococcus. The accuracy of the method was estimated by comparison with the intraoperative data.Results.The data of computed tomography while the planning of liver autotransplantation coincided with the intraoperative data in all examined patients. The main criteria indicating the need for this type of surgical intervention was the involvement of the retrohepatic part of the inferior vena cava to the caval gates inclusive and/or hepatic veins. With extrahepatic spread of parasitic masses it is possible to affect not only the surrounding organs, but also the main vessels, for example, with growth in the hepatic-duodenal ligament. Thus, in one patient during the operation, the occlusion of artery hepatica propria was confirmed. In two cases of recurrence of the parasitic process after rightsided hemihepatectomy, the almost identical pattern of involvement of the liver resection surface, inferior cava and portal veins, diaphragm, adrenal gland in combination with a extent adhesive process in the right subdiaphragmal space.Conclusions.CT scan data allowed to correctly plan the volume of operative intervention – autotransplantation of the liver – in all the examined patients. It is of interest to evaluate the accuracy of the method on a larger group of patients.

FETAL VENOUS CIRCULATION

2003 ◽  
Vol 14 (1) ◽  
pp. 57-95 ◽  
Author(s):  
TORVID KISERUD
Keyword(s):  
Superior Vena ◽  
Pulmonary Veins ◽  
Vena Cava ◽  
Venous System ◽  
Ductus Venosus ◽  
Hepatic Veins ◽  
Ultrasound Images ◽  
Venous Flow ◽  
Venous Circulation ◽  
Ultrasound Evaluation

Ultrasound evaluation of the venous system is now a compulsory part of the haemodynamic assessment of the fetus. Once umbilical venous flow was introduced1,2 and its pulsatile pattern discovered in the compromised fetus,3 other sections of the venous system have been added or explored for possible diagnostic use: the inferior and superior vena cava,4,5 ductus venosus,6,7 hepatic veins,8 pulmonary veins,9,10 and intracranial veins.11-13 The following presentation is not intended to be a complete review of the fetal venous circulation, which is growing by the day, but rather to focus on some central issues with an emphasis on physiologic principles. The reason for this focus is that, as clinicians, we tend to work according to pattern recognition, which is a necessary principle in daily life. However, in the long run as the fetal patient increasingly demands a more dynamic approach to solve the diagnostic riddles, we find ourselves digging deeper into the physiological mechanisms behind ultrasound images and recordings.

scholarly journals Vascular Involvements in Cholangiocarcinoma: Tips and Tricks

Cancers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 3735
Author(s):  
Roberta Angelico ◽  
Bruno Sensi ◽  
Alessandro Parente ◽  
Leandro Siragusa ◽  
Carlo Gazia ◽  
...  
Keyword(s):  
Portal Vein ◽  
Hepatic Artery ◽  
Vena Cava ◽  
High Volume ◽  
Vascular Reconstruction ◽  
Ex Situ ◽  
Vascular Involvement ◽  
Hepatic Veins ◽  
Hepatic Artery Resection ◽  
Artery Resection

Cholangiocarcinoma (CCA) is an aggressive malignancy of the biliary tract. To date, surgical treatment remains the only hope for definitive cure of CCA patients. Involvement of major vascular structures was traditionally considered a contraindication for resection. Nowadays, selected cases of CCA with vascular involvement can be successfully approached. Intrahepatic CCA often involves the major hepatic veins or the inferior vena cava and might necessitate complete vascular exclusion, in situ hypothermic perfusion, ex situ surgery and reconstruction with autologous, heterologous or synthetic grafts. Hilar CCA more frequently involves the portal vein and hepatic artery. Resection and reconstruction of the portal vein is now considered a relatively safe and beneficial technique, and it is accepted as a standard option either with direct anastomosis or jump grafts. However, hepatic artery resection remains controversial; despite accumulating positive reports, the procedure remains technically challenging with increased rates of morbidity. When arterial reconstruction is not possible, arterio-portal shunting may offer salvage, while sometimes an efficient collateral system could bypass the need for arterial reconstructions. Keys to achieve success are represented by accurate selection of patients in high-volume referral centres, adequate technical skills and eclectic knowledge of the various possibilities for vascular reconstruction.

Recanalization and Reconstruction of a Chronically Occluded Inferior Vena Cava Through an Existing Transjugular Intrahepatic Portosystemic Shunt in the Setting of Budd-Chiari Syndrome

2021 ◽  
pp. 153857442110020
Author(s):  
Reza Talaie ◽  
Hamed Jalaeian ◽  
Nassir Rostambeigi ◽  
Anthony Spano ◽  
Jafar Golzarian
Keyword(s):  
Inferior Vena Cava ◽  
Transjugular Intrahepatic Portosystemic Shunt ◽  
Inferior Vena ◽  
Vena Cava ◽  
Portosystemic Shunt ◽  
Hepatic Veins ◽  
Budd Chiari Syndrome ◽  
Chiari Syndrome ◽  
Intrahepatic Portosystemic Shunt ◽  
The Right

Budd-Chiari syndrome (BCS) results from the occlusion or flow reduction in the hepatic veins or inferior vena cava and can be treated with transjugular intrahepatic portosystemic shunt when hepatic vein recanalization fails.1-3 Hypercoagulable patients with primary BCS are predisposed to development of new areas of thrombosis within the TIPS shunt or IVC. This case details a patient with BCS, pre-existing TIPS extending to the right atrium, and chronic retrohepatic IVC thrombosis who underwent sharp recanalization of the IVC with stenting into the TIPS stent bridging the patient until his subsequent hepatic transplantation.

scholarly journals A case of infrahepatic incomplete interruption of inferior vena cava with both azygos and portal system continuation

Kanzo ◽  
2017 ◽  
Vol 58 (6) ◽  
pp. 338-343 ◽  
Author(s):  
Soichiro Kiyono ◽  
Hitoshi Maruyama ◽  
Kazufumi Kobayashi ◽  
Tetsuhiro Chiba ◽  
Osamu Yokosuka
Keyword(s):  
Inferior Vena Cava ◽  
Inferior Vena ◽  
Vena Cava ◽  
Portal System

Budd-Chiari Syndrome in Childhood Secondary to Inferior Vena Caval Obstruction

PEDIATRICS ◽  
1979 ◽  
Vol 63 (5) ◽  
pp. 808-812
Author(s):  
Arvind Taneja ◽  
S. K. Mitra ◽  
P. D. Moghe ◽  
P. N. Rao ◽  
N. Samanta ◽  
...  
Keyword(s):  
Inferior Vena ◽  
Vena Cava ◽  
Hepatic Veins ◽  
Budd Chiari Syndrome ◽  
Venous Outflow ◽  
Massive Ascites ◽  
Inferior Vena Caval ◽  
Uncommon Disease ◽  
Chiari Syndrome ◽  
Hepatic Venous Outflow

Budd-Chiari syndrome is an uncommon disease caused by an obstruction to hepatic venous outflow either at the level of the hepatic veins or in the hepatic part of the inferior vena cava. Clinically, it presents with ascites, abdominal pain, hepatomegaly, edema, and occasionally jaundice. The syndrome was first recognised by Lamboran1 in 1842 and later described by Budd2 in 1846 and Chiari3 in 1899. The syndrome is caused by obstruction to the hepatic veins. In the Fig 1. Photograph showing massive ascites and dilated superficial abdominal veins. majority of cases, the obstruction is ascribed to obliterative thrombophlebitis of unknown cause.4

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