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Biomedical subjects

K Gellert

Publications and source records attributed to K Gellert.

32 records · Page 2Linked to original sources

[Current therapy of bile duct cysts. II. Intrahepatic cysts (Caroli syndrome)].

17 patients with a Caroli's syndrome are reviewed with emphasis on clinical features and late results (follow-up: 2-10 years). The group consists of 9 women and 8 men ranging in age from 17 to 80 years (mean of 42.6). 14 patients had a diffuse form, 5 of whom had periportal fibrosis with secondary biliary cirrhosis, which in 3 cases resulted in a portal hypertension with hepatic failure. In only 3 cases the dilatation was limited to the left lobe of the liver. 9 of the patients had previously undergone surgery in the form of cholecystectomy and choledocholithotomy elsewhere. The disease was complicated by lithiasis (14 intrahepatic, 9 extrahepatic). Curative treatment was only possible in the 3 patients with unilobar Caroli's syndrome (partial liver resection). In 5 patients we performed a cholecystectomy and choledocholithotomy combined in 2 cases with a transduodenal sphincterotomy. There was no operative death. Endoscopic treatment consisted in removal of stones and decompression of the biliary tree by sphincterotomy in 9 cases and endoscopic retrograde biliary drainage (endoprosthesis) in 5 cases. Excepting the 3 curative operated patients who are asymptomatic respectively 2, 4 and 5 years after surgery, the remaining cases had repeated bouts of acute pains accompanied by recurrent episodes of cholangitis. A late mortality of 23.5% (4 patients) is proof of the poor prognosis of this disease.

Adolescent↗

[Laparoscopic gastrectomy. A case report].

Although laparoscopic techniques in gastric surgery have become an important part of upper gastrointestinal surgery, they are mainly utilized for organ preserving procedures. A standardized technique for laparoscopic gastrectomy has not yet been described in detail. The purpose of this study was to develop a standardized technique for laparoscopic gastrectomy with reconstruction by a stapled termino-lateral esophago-je-junostomy and Roux-en-Y-anastomosis in a cadaver model. The resected stomach was removed through an enlarged trocar incision. The described technique has been successfully performed in one patient with early gastric cancer.

Adenoma, Villous↗

[Diagnosis and therapy of postoperative chyloperitoneum].

Chyloperitoneum is a rare complication of surgical procedures. We report a case of severe chyloperitoneum after abdominothoracic esophageal resection with two-field lymphadenectomy. After diagnosis was established, the lymph leak was located with oral iodine-marked fatty acids (123I-pentadecanoic acid) showing increased activation in the right middle abdomen. Because conservative treatment with total parenteral nutrition showed no decrease in chyle volume, relaparatomy was performed and the lymphatic fistula was successfully treated with suture ligatures. Pathophysiology and different options for localization and treatment of postoperative chyloperitoneum are discussed.

Carcinoma, Squamous Cell↗

[Cystic tumors of the pancreas].

Cystic neoplasms of the pancreas are rare but in the last years more frequently detected. Within a 10-year-period we treated 30 patients, including 8 serous cystadenomas, 6 mucinous cystadenomas, 12 mucinous cystadenocarcinomas, 2 cystic neuro-endocrine tumors and 1 papillary cystic tumor respectively acinar cell cyst-adenocarcinoma. 80% of the patients had symptoms, experienced abdominal pain, weight loss, weakness or abdominal mass. In eight patients the tumors had been misdiagnosed as a pancreatic pseudocyst. The correct type of cystic tumor was diagnosed by preoperative investigations only a few cases. All patients with serous or mucinous cystadenomas are well and without evident recurrence after resection of the tumor. However the survival time of malignant cystic tumors varied strongly. The curative resection of these tumors give patients the chance of long-term survival.

Adult↗

[Lymphadenectomy in surgery of bronchial carcinoma].

Since 1982 a total number of 1062 patients underwent surgical treatment of bronchogenic carcinoma. There were 972 men and 89 women, with a mean age of 62.5 years. In 484 cases a squamous cell carcinoma was diagnosed and in 416 patients an adenocarcinoma. An alveolar cell carcinoma was found in 54 and a polymorphocellular carcinoma in 68 patients respectively. 334 patients were found to be in stage I, 233 in stage II and 438 patients were in stage IIIa. The 5-year survival rate was 57.2% in stage I and 32.5% in stage II. The group of patients with N2 lymph node metastasis according stage IIIa showed a very poor 5-year-survival rate of 12.3%. A standard therapeutical procedure according to a multimodal concept is necessary to improve these patients' long-term survival. Systemic lymphadenectomy is essential for adequate therapy.

Adult↗

[Current therapy of bile duct cysts. I. Extrahepatic cysts].

A total of 23 patients with extrahepatic biliary cysts (11 type I, 4 type II, 4 type III and 4 type IVa according to the classification by Todani) seen at our institution in a 15-year period were reviewed with emphasis on management and long-term results at follow-up of 3 weeks-12 years. Associated hepatobiliary disease occurred in 4 patients, including one case with malignant degeneration in the cyst 23 years after cystenterostomy, and an association of a gallbladder carcinoma with a choledochocele in the other patient. Radical excision of the dilated bile duct and reconstruction by Roux-en-Y hepatico-jejunostomy was performed in 13 cases (9 type I, 3 type II and 1 type III), combined in 3 cases with an antireflux valve. All 13 operated on patients remained in good health for 6 months to 12 years. These results confirm the need for complete early excision of type I, (II) and IVa cysts at all ages before severe complications can occur. Endoscopic treatment of type III choledochocele should be limited to the management of smaller lesions.

Adolescent↗

[Surgical therapy of malignant thoracic wall tumors].

Surgical treatment of primary and secondary malignant chest wall tumors present various difficulties depending on their localisation in the anterior, lateral and posterior thoracic wall. The reconstruction and the flap-plastics have to fulfill the functional and cosmetic demands. We report on 35 patients, 22 female and 13 male, ranging in ages from 19-69 (mean 44.59) years. There were 17 primary and 18 secondary tumors. The operation included excision of the thoracic shield, partial or total breast-bone and clavicle resection. Materials used for reconstruction were PTFE-patches, lyophilized dura and ribs. Soft tissue reconstruction was performed by sliding-flap plastics. The one-year survival rate was 90.6%.

Adult↗

Preservation damage in liver transplantation. Influence of rapid cooling.

Liver preservation and transplantation was performed in pigs. For flush perfusion cold (2 degrees C) and warm (15 degrees C) lactated Ringer's solution were compared. Administration of cold Ringer's resulted in a severe endothelial damage of sinusoids that was aggravated after recirculation, as shown by electron microscopic examination. Using warm Ringer's solution this alteration was limited. Liver parenchymal cells are impaired mainly during reflow as a consequence of microcirculatory disturbance. After cold flushing animals died within a few hours, whereas after flushing with warm Ringer's solution pigs survived definitively.

Animals↗

Alteration of the ultrastructure of the pig liver after a continuous perfusion of six hours in vitro.

Livers of mini LEWE pigs were perfused continuously for 6 h on a novel perfusion system through the portal vein (laminar flow from 200 to 300 ml/min, pressure 270 Pa) and through the A. hepatica (pulsating flow from 100 to 200 ml/min, pressure: 10.6/5.5 kPa). The following perfusion media were used for determining the best conservation conditions at 10 to 12 degrees C: Pig blood/Krebs-Henseleit bicarbonate buffer 1:1; Pig blood/Ringer lactate solution 1:1; Pig plasma; Collins C 2 perfusion solution. After perfusion with Collins C 2 solution the hepatocytes show swelling and dilation of the granular endoplasmic reticulum; after perfusion with the other solutions the changes of the hepatocytes are negligible. The alterations of the sinusoidal wall cells depend on the perfusion pressure and flow and the composition of the solution. After continuous perfusion the sinusoidal walls are characterized by vesicles of endothelial cells, dilatation of the Disse space and fragmentation of hepatic microvilli.

Animals↗

[Test of the vitality of hypothermically stored and cryopreserved rat hearts following in vivo coronary perfusion].

Experiments were carried out on cryopreservation of rat hearts. Viability of hearts perfused with cryoprotectant containing solutions as estimated by a short-time connection of rewarmed hearts with the circulation of a recipient animal. ECG, contraction and reflow from the perfused heart were measured. The same method were carried out in hearts after hypothermic storage.

Animals↗

[Blood specimen collection and liver biopsy in miniature swine].

The collection of investigational material means a problem occasionally during long-term observations of experimental animals. The described methods for punction of the superior vena cava and the percutaneous liver biopsy by means of a prostatic biopsy needle in miniature swine are carried out easily by one examinator without auxiliary personnel. Sufficient investigational material of good quality is to receive. Complicating factors are shown.

Animals↗

Surgery for carcinoma of the gallbladder.

BACKGROUND/AIMS: Carcinoma of the gallbladder is one of the gastrointestinal malignancies with an extraordinarily poor prognosis. The 5-year survival rate amounts to less than 5 per cent in most series. Our aim was to analyze the experience of a single center with surgery for gallbladder carcinoma with special reference to liver wedge resection. MATERIALS AND METHODS: A retrospective analysis examined all patients of the Clinic of Surgery of the Humboldt University Medical School (Charité) with diagnosed gallbladder carcinoma operated on between January 1981 and August 1993. The analysis was based on patient documentation. Cumulative survival rates were calculated according to the method of Kaplan/Meier. Statistical significances were calculated using logrank and Wilcoxon's tests. RESULTS: Eighty one patients (61 female, 20 male) were included in the study. The preoperative diagnoses were confirmed in 33 patients (40.7%). The stage distribution according to the TNM-system revealed 6, 10, 12, and 53 patients at the stages I-IV, respectively. The curative resection rate was 22.2%. Stage-dependent surgical procedures resulted in cumulative survival rates of 33.3% for stages I and II, 8.3% for stage III and 1.9% for stage IV. The overall prognosis was significantly determined by metastatic spread to the lymph nodes. CONCLUSIONS: Diagnostic efforts should focus on detecting the low stages I and II of gallbladder carcinoma. Our results suggest that aggressive surgical management with second intervention and wedge resection or more extended liver resection is the method of choice for stage T1b or more advanced stages of gallbladder carcinoma.

Adenocarcinoma↗