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Biomedical subjects

P Chaumont

Publications and source records attributed to P Chaumont.

At least 37 records · Page 2Linked to original sources
PubMed1985

Ultrasonic demonstration of porto-caval anastomosis in portal hypertension in children.

Seventy-one children with portal hypertension and a portocaval anastomosis were studied by ultrasound. The patency of the shunt may be inferred when it directly visualised. There are four indirect signs of patency: (1) decrease of the thickness of the lesser omentum; (2) decrease of the gastro-oesophageal collaterals; (3) decrease of the portal vein size; and (4) increase of the diameter of the inferior vena cava, as compared to pre-operative ultrasound.

Adolescent↗
PubMed1985

Emergency embolization in posttraumatic hemobilia in a child.

The authors report a case of hemobilia in a ten-year-old boy after abdominal trauma. An intrahepatic false aneurysm was successfully embolized during the diagnostic angiogram. This is, to their knowledge, the first pediatric case successfully embolized with posttraumatic hemobilia.

Abdominal Injuries↗
PubMed1984

Liver adenomas in glycogen storage disease in children. Ultrasound and angiographic study.

The authors report the ultrasound and angiographic features of adenomas occurring in children with glycogen storage disease. Seven cases from 83 patients were diagnosed either by ultrasound, preoperative angiography or during surgery. The lesions appear on ultrasound as multiple rounded intrahepatic masses. Their degree of echogenicity as well of vascularity on angiography is highly variable. Ultrasound is the modality of choice in detecting adenomas. No malignant degeneration was observed.

Adolescent↗
PubMed1984

Hepatic tumors in children: ultrasonic differentiation of malignant from benign lesions.

The authors studied 21 hepatic tumors in children using B-scan and real-time ultrasound as well as angiography. The final diagnosis was established surgically. Cystic tumors and hemangioendotheliomas were excluded. In all but one malignant tumor (15/16), ultrasound showed absence of one branch of the portal vein in the area of the tumor. Partial amputation of intrahepatic portal branches was confirmed angiographically in all cases. In all 6 benign tumors, ultrasound demonstrated a patent portal system despite compression by tumor. These findings were confirmed angiographically. No specific echo pattern allowing differentiation between benign and malignant tumors was found. The authors conclude that ultrasonic differentiation between malignant and benign hepatic tumors in children is possible, provided that special attention is given to the intrahepatic vessels.

Adenoma↗
PubMed1981

Ultrasonography and percutaneous cholangiography in children with dilated bile ducts. Report of six cases.

Six children had dilation of intrahepatic and extrahepatic bile ducts. The dilation was associated with or was secondary to lithiasis in two patients, spontaneous bile duct perforation in two others, and an abnormal pancreaticobiliary junction in the last two. All the children were screened by ultrasonography; five were subsequently examined by percutaneous transhepatic cholangiography. Ultrasonography permits rapid detection of bile duct dilation, while percutaneous cholangiography aids in the choice of the surgical procedure by locating the site of obstruction and sometimes disclosing the cause of obstructive jaundice.

Bile Duct Diseases↗
PubMed1981

Vascular occlusive agents.

The authors have reviewed the experimental literature about the different agents used for endovascular embolization: clots, tissues, duramater, Gelfoam, oxydized cellulose, Ivalon, beads, microspheres, cyanoacrylates, silicone, barium. Each occlusive agent was studied in regard to its physical properties, injection methods, characteristics of obstruction, vascular reaction, and toxicity. The level and quality of obstruction obtained depend on many factors which are discussed.

Animals↗
PubMed1980

Ultrasonographic diagnosis of portal cavernoma in children: a study of twelve cases.

Portal vein and its two branches were evaluated by ultrasound in 12 children (14 months to eight years) with portal cavernomas; the cavernomas appeared idiopathic (five cases) or were secondary either to a catherization of umbilical vein in the neonatal period (six cases) or to trauma (one case). Angiographic confirmation of cavernoma was obtained in all patients. Twelve patients with intrahepatic portal hypertension were used as controls. The following abnormal patterns were observed: (1) absence of normal portal vein; (2) absence of normal portal division; (3) tortuous, small and irregular appearance and/or abnormal sagittal division of the venous system; (4) presence of small linear echoes dotting the portal vein; (5) presence of small linear echoes dotting the porta hepatis area. Ultrasonogram was normal in the 12 controls. Thus, ultrasound appears to be a procedure of choice in the evaluation of portal cavernomas, permitting postponement of invasive angiographic examination until surgical treatment is anticipated.

Child↗
PubMed1980

[Ultrasound and portal hypertension in children. Demonstration of gastro-oesophageal collaterals. Preliminary report (author's transl)].

The authors studied the value of ultrasonography in demonstrating oesophageal collaterals in portal hypertension in childhood. 22 children with portal hypertension underwent successively an ultrasound examination and an endoscopy looking for submucosal oesophageal varices. Oesophageal collaterals were said to be present when ultrasound showed vascular structures in the gastro-hepatic ligament above the coeliac trunk origin. Among those 22 patient 18 had a satisfactory ultrasound examination. 12 true positive, 3 true negative, 3 false negative ultrasound examinations were obtained. 4 ultrasound studies were inconclusive. The value of ultrasound in the pre and post surgical check-up of portal hypertension in children is emphasized.

Adolescent↗