Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Portography”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 91 records · Page 5Linked to original sources
PubMed1989

[Percutaneous transhepatic portography in patients with hepatocellular carcinoma: percutaneous transhepatic portal venous embolization].

Percutaneous transhepatic portography was performed in 28 patients with HCC and PTPE was attempted in 9 of them. Displacement of the portal vein was found in 37% of 52 HCCs. Other portographic findings were: encasement (19%), avascular area (19%), occlusion (10%), narrowing (4%), neovascularization (4%), tumor staining (2%). Frequency of the tumor-related portography findings was found to be increased in relation to tumor size. TAE followed by PTPE with stainless steel coil (6 cases) or microcapsule form of MMC (3 cases) was performed on 9 cases. PTPE appears to be a promising adjuvant to conventional TAE.

Aged↗
PubMed1989

[Evaluation of the relationship between esophageal varices and azygos vein using percutaneous transhepatic cine-portography].

To evaluate the relationship between esophageal varices and the azygos vein--which is generally considered to drain the major part of the esophageal variceal blood--we examined 36 patients with portal hypertension using percutaneous transhepatic cine-portography. The patients were classified into three groups (azygos, cervical and combined) according to the amount of blood to be considered drained by the azygos vein. Eighteen patients (50%) fell into the azygos type group, five (14%) into the cervical, and 13 (36%) into the combined. Highly developed esophageal varices were recognized endoscopically in all patients in the combined and cervical type groups while some of the patients in the azygos type group had less well developed varices. In the azygos type group, there was a tendency for the varices to be increasingly severe the higher the part of the azygos vein they drained into. Because it helps us to fully comprehend the significance of the azygos venous blood flow and the occasionally uncertain effect of endoscopic injection sclerotherapy for esophageal varices, it is important to evaluate the drainage route of esophageal varices in vivo and in detail. Percutaneous transhepatic cine-portography is the useful method for this purpose as it enables us to visualize even the most minute blood stream.

Aged↗
PubMed1985

Intraoperative direct portography to achieve selective distal splenorenal shunt.

Repeated direct portography was performed during distal splenorenal shunt in 13 consecutive patients with esophageal varices due to cirrhosis of the liver. The roentgenogram taken at the completion of all operative procedures demonstrated incomplete disconnection between the mesentericoportal and gastrosplenic compartments in four patients. After further disconnection of the veins, the third portogram showed a successful isolation of both systems. The flow state through and the size of the shunt were appropriate in all instances on the roentgenograms. The shunt was patent in all patients, which was confirmed before discharge from the hospital. Hepatic encephalopathy was encountered one year after operation in one patient with the poorest hepatic functions. Esophageal varices disappeared or nearly disappeared at the time of discharge in ten patients. The remaining varices at discharge in another three patients completely disappeared within six months after operation. None of the patients experienced variceal bleeding during the follow-up period of three to 25 months. The results may indicate that repeated intraoperative direct portography is useful in achieving a selective distal splenorenal shunt.

Adult↗
PubMed1995

[Spatial and temporal alteration of the dual supply of the hepatic circulation with transient occlusion of the hepatic veins: spiral volumetric CT during arterial portography and arteriography].

To elucidate the contribution of hepatic veins to the blood flow of liver, CT arterial portography and/or arteriography was performed in eight patients having hepatocellular carcinoma with transient occlusion of the hepatic vein and eight without occlusion. In each patient with occlusion of the hepatic vein, CT showed a well-demarcated fan-shaped area of low density during arterial portography and increased density during arteriography in the corresponding area. Hepatic vein occlusion could result in the pooling of arterial blood in the liver parenchyma. Transient segmental hepatic venous occlusion might improve the results of transcatheter arterial infusion and transcatheter arterial embolization for liver tumors.

Adult↗
PubMed1997

[CT combined with arterial portography. A sensitive method for evaluation of liver tumors].

During the period 1994-95, 22 patients were examined with CT during arterial portography for evaluation of hepatic tumours. The majority, 20 patients, had metastases from colon cancer. All patients were candidates for liver resection. In the series of patients described here, this process detected additional lesions in four more of the patients than found with any other imaging techniques. This supports that CT during arterial portography is the most sensitive method for detecting small malignant hepatic tumours, and for localizing them in relation to liver segments and major vascular structures. Optimal results are obtained in the absence of diffuse parenchymal disease and portal hypertension. Non-tumourous perfusion defects limit the accuracy of this technique, but such defects have characteristic locations and appearance. In difficult cases the technique should be correlated with ultrasonography and MR.

Adult↗
PubMed1997

[Intraoperative portography in operations for resection of pancreas neoplasms].

Since 1993 during pancreatic resection routine intraoperative portography has been employed. Thus we are able to establish infiltration engaging portal vein and its branches. Facilitating decision making about resectability of the tumor. 29 portographies were performed. In eight cases malignant infiltration on portal vein was established. Because of that in seven cases no radical resection was undertaken.

Aged↗
PubMed2006

Ultrasonographic portography with low mechanical index gray-scale imaging in hepatic VX2 tumor.

To evaluate the characteristics of portal blood supply of hepatic tumors by ultrasonographic portography (USP), an in vivo model was studied using SonoVue, a second-generation ultrasound contrast agent (UCA) and low mechanical index (MI), gray-scale harmonic imaging. SonoVue (0.05 mL) was administrated through catheter placed into the main trunk of portal vein at laparotomy, followed by a 0.5 mL saline flush, in 12 rabbits with hepatic VX2 tumor, implanted by VX2 tumor tissue cubes of approximately 1 mm3 from carrier rabbit. Results showed that low MI gray-scale imaging delineated clearly the dynamic enhancement of tumors and liver parenchyma. Among 22 tumors, seven tumors were diffusely increased, with the intensity of enhancement weaker than that of the surrounding liver parenchyma. The UCA was washed out earlier from tumors than from surrounding liver parenchyma. Three tumors showed the branches of portal vein. Five tumors showed peripheral contrast enhancement and a central coarse unenhanced hypoechoic area. Seven tumors displayed no actual enhancement. All lesions (100% [22 of 22]) were depicted clearly in the whole duration of enhancement, especially in the early and late phase, regardless of enhancement pattern, and portal blood flow was manifested in 15 of 22 (68%) tumors, by USP. The enhancement pattern of the tumors corresponded to the pathologic findings. The results indicated that ultrasonographic portography, combined with low MI levels and second-generation UCA, is a sensitive and safe method to study portal blood supply for liver cancer. It may contribute to improvement of the detectability and diagnostic ability and assist the choice of a therapeutic strategy for treatment of liver cancer. However, applicability of the method to human may be problematic because of high invasiveness and great difficulty in administering contrast medium.

Animals↗
PubMed2000

Evaluation of balloon-occluded hepatic venography with carbon dioxide for portography and correlation between retrograde portogram and liver function in patients with liver cirrhosis.

Background/Aim: Hepatic venography with a positive-contrast medium has been reported as a method for evaluating liver disease. However, the contrast medium used in this method provides insufficient portal vein observation and may cause severe liver injuries. Carbon dioxide (CO(2)), a negative-contrast medium, may be able to depict the portal vein system with minimal hepatic toxicity. The aim of this study was to evaluate the usefulness and side-effects of balloon-occluded hepatic venography with CO(2) (CO(2) venography) and to evaluate the correlation between retrograde portogram and liver function in patients with cirrhosis. Subjects and methods: The subjects consisted of 23 biopsy-proven cirrhotic patients (male:female, 16:7; age, 58+/-12 years, range 34-80). The causes of cirrhosis were alcohol intake in ten, HCV infection in ten, HBV infection in one, primary biliary cirrhosis in one and Budd-Chiari syndrome in one. Of these patients, six were complicated with hepatocellular carcinoma (HCC). CO(2) venography was performed with an occlusion balloon catheter, and 25 ml of CO(2) was infused. CO(2) portograms were scored as follows: 0, no visualization of portal veins; 1, visualization of peripheral portal branches; 2, unilateral first portal branch; 3, bilateral first portal branches; 4, main portal vein; 5, left gastric vein, superior mesenteric vein and splenic vein. Hepatic venous pressure gradient (HVPG), cardiac functions, biochemical analysis, blood gas analysis and oxygen (O(2)) saturation monitoring were measured simultaneously. Arterio-portography was also performed. To evaluate the usefulness of CO(2) venography in patients with HCC accompanied by portal vein tumor thrombus (PVTT), three patients were also examined. Results: No significant changes in ALT, AST, O(2) saturation or blood gas data were observed after CO(2) venography. A statistically significant positive correlation was observed between CO(2) portogram scores and Child-Pugh scores (r=0.68, P=0.003). The correlations between CO(2) portogram scores and HVPG, and the forms of gastroesophageal varices in patients without PVTT and major shunts were not significant. The CO(2) portogram score was significantly higher in patients with alcoholic liver cirrhosis than in those with HCV-positive cirrhosis (P=0.04). Cavernous transformation and peripheral portal branches were demonstrated in patients with HCC accompanied by PVTT. These findings could not be observed by arterio-portography. Conclusion: CO(2) venography to obtain retrograde portogram is a safe and useful method for evaluating the portal vein system and liver function in patients with liver cirrhosis.

Journal Article↗
PubMed1978

[Results of percutaneous transhepatic portography (author's transl)].

The technique, indications, contraindications and complications of percutaneous transhepatic portography based on the experience of 300 cases are described. The advantage of this method is discussed and compared with transjugular and transumbilical portography.

Esophageal and Gastric Varices↗
PubMed1980

[Transfemoral portography (author's transl)].

In 15 cadavers the portal vein was dissected and punctured from the inferior vena cava by means of a coaxial needle (Johnson needle) introduced through the femoral vein. Success was confirmed by screening after contrast injection, by appropriate radiographs and following the use of coloured material by inspection. A modification of the technique was the use of a catheter introduced into the femoral vein by the Seldinger technique. In only one case was extravasation observed, and there was not incorrect injection into the inferior vena cava. These experiments demonstrate the feasibility of transfemoral portography. Its use in patients would also appear to be possible. The puncture is best carried out by radiographic observation and real time ultra sound. Possible complications from damage to neighbouring structures and from bleeding are possible, though apparently not serious. The indications and possible modifications of transfemoral portography are discussed and compared with other methods. The possibility of performing a portocaval shunt by means of the catheter in order to stop bleeding from oesophageal varices is stressed.

Angiography↗
PubMedDate not supplied

Dynamic computed tomography during arterial portography: the most sensitive examination for small hepatocellular carcinomas.

The efficacy of dynamic sequential CT with table incrementation during arterial portography (DSCTI-AP) in the detection of small hepatocellular carcinomas (HCC) (less than 3 cm in diameter and less than three in number) was analyzed in comparison with other imaging methods including radionuclide (RN) liver scans, ultrasound (US), CT, selective celiac angiography (SCA), and infusion hepatic angiography (IHA). The sensitivity of each study in detecting 19 cases of small HCC was as follows: RN, 16%; US, 63%; CT, 58%; SCA, 58%; IHA, 83%; and DSCTI-AP, 95%. Three of 19 cases were diagnosed only by DSCTI-AP and one case that could not be visualized by DSCTI-AP was opacified by IHA. Dynamic sequential CT with table incrementation during arterial portography was superior to IHA in visualizing small HCCs.

Adult↗
PubMed1980

Percutaneous transhepatic portography for obliteration of gastroesophageal varices in partial and total portal vein occlusion.

The obliteration of gastroesophageal varices was attempted with percutaneous transhepatic portography in seven patients who had partial and total portal vein occlusion. The procedure was successful and stopped variceal bleeding in three patients. In three cases only portography was performed, and in another patient the examination was not possible. The possibilities of this new treatment for bleeding in portal vein thrombosis are discussed and the problems encountered in performing the examination are presented.

Adolescent↗
PubMed1985

Hemodynamics of portal blood flow shown by CT portography. Work in progress.

Computed tomography and arterial portography were combined in 12 patients for studies of the anatomy and hemodynamics of the portal venous system. This technique was found to be more sensitive than conventional venous-phase angiograms of the superior mesenteric and splenic arteries for evaluation of the anatomy of the portal venous system and extent of thrombosis in patients with cavernous transformation and also facilitated recognition of subtle evidence of hepatofugal flow and portosystemic shunts. CT portography can be employed when conventional angiograms fail to show the portal vein adequately.

Adult↗
PubMed1978

Percutaneous transhepatic portography.

The technique, indications, contraindications and complications of percutaneous transhepatic portography and selective catheterization of the major and minor veins draining the splanchnic organs based on the experience of 200 cases are described. The advantage of this method is discussed and compared with transjugular and transumbilical portography.

Adult↗
PubMed1980

Percutaneous transhepatic portography in pancreatic carcinoma. Diagnosis and evaluation of resectability.

In 33 patients with carcinoma of the head of the pancreas, both angiography and percutaneous transhepatic portography combined with selective phlebography of the pancreatic veins were performed. The tumour diagnosis was made in 28 patients by angiography and in 21 by phlebography. Correlation was found between extrapancreatic artery encasement, involvement of the main stems of the portal vein system and non-resectability of the tumour. In 5 patients venous involvement demonstrated by portography was the only indication of non-resectability of the tumours.

Angiography↗
PubMed1979

Percutaneous transhepatic portography. II. Comparison with splenoportography in portal hypertension.

Percutaneous transhepatic portography and splenoportography were compared in 67 patients with portal hypertension. Portograms were evaluated without knowledge of the identity of patients. Factors evaluated included technical success of the examination; visualization of the portal vein, splenic vein, and other tributaries; contrast medium density, portal blood flow direction; presence and type of collaterals and varices; and liver size and configuration. Percutaneous transhepatic portography proved superior with regard to delineation of the portal venous system and esophageal varices. A definite diagnosis of portal vein thrombosis was possible only with the transhepatic approach.

Adolescent↗
PubMed1978

Correlation between percutaneous transhepatic portography and clinical findings in 56 patients with portal hypertension.

56 consecutive patients with portal hypertension were studied with percutaneous transhepatic portography and the results were correlated to clinical findings and the number of upper gastrointestinal haemorrhages and the size of the individual bleeding. An abundance of collateral paths was noted in most patients. No regularity in development of these collaterals was found. It was not correlated to liver disease etiology, sex or liver function parameters. Portal pressure was not correlated to the size or amount of collaterals. In four patients with liver cirrhosis hepato-fugal flow in one segment of the liver was noted proving that portal flow through the liver is not uniform in this disease. The size of the haemorrhages was only correlated to presence of hepato-fugal flow in the main stem of the portal vein. It was not correlated to the estimated size of the oesophageal varices or to portal pressure. Percutaneous transhepatic portography seems to be of little help in selecting "high risk bleeders" in portal hypertension. Other factors may be of greater help in this task as indicated by the findings in this investigation that patients with alcohol cirrhosis had larger haemorrhages than those with cirrhosis of another etiology and that patients with none or few bleeding episodes had higher thrombocyte count than those with several haemorrhages.

Aged↗
PubMedDate not supplied

Intraarterial digital subtraction portography in patients with liver tumors.

Intraarterial digital subtraction portography (IADSP) via the superior mesenteric artery was performed in 50 patients with liver tumors. In most cases IADSPs provided images as good as conventional arterial portography through the superior mesenteric artery and they produced important information as to whether patients should be treated by transcatheter arterial embolization, surgical resection or chemotherapy. IADSP helps to reduce the examination time, the number of films and contrast material used, as well as the pain suffered by patients.

Humans↗