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M Messner

Publications and source records attributed to M Messner.

At least 55 records · Page 3Linked to original sources
PubMed1989

[Uncommon arterial and venous reconstruction in liver transplantation].

The aim of this work was to define the best technical options of reconstruction that we can proposed in front of an anatomical or parietal anomalies of venous or arterial system in hepatic transplantation. Through a retrospective study of 10 reconstructions performed between 1978 and 1989, we observed 5 cases of right hepatic artery from superior mesenteric artery of the donor. The two basic methods of reconstruction were either the "fold over" technic of Gordon or the realization of an end to end anastomosis between donor's right hepatic artery and donor's splenic artery. In 3 cases, the insufficiency of the hepatic arterial blood flow after classic anastomosis, led us to employ an arterial iliac graft between the recipient's aorta and the donor's coeliac patch. 2 patients with portocaval shunt or portal parietal defect underwent reconstruction by venous iliac graft. In conclusion, we emphasize the importance of a perfect reconstructed reconstruction as much on the anatomical level than functional.

Arteriovenous Malformations↗
PubMed1988

Detection of native human complement components C3 and C5 and their primary activation peptides C3a and C5a (anaphylatoxic peptides) by ELISAs with monoclonal antibodies.

Monoclonal antibodies (mAbs) were raised against human C3a, C3b, C5a, and C5b after immunization of BALB/c mice with the native components C3 and C5. Using different combinations of these mAbs we have developed four sensitive sandwhich-enzyme-linked immunosorbent assays (ELISAs) for the detection of native C3 or C5 in samples with low concentrations of these proteins, e.g., in cell culture supernatants or synovial fluids and cerebrospinal fluids (CSF) and for the detection of the anaphylatoxic peptides (AT-peptides) C3a or C5a in human EDTA-plasma. The C3- and C5-ELISAs were found to be specific for the uncleaved complement proteins. Two different anti-C3a or anti-C5a mAbs were combined for the C3a- and C5a-ELISA. Before assaying a sample in the C3a- or C5a-ELISA a precipitation step to eliminate uncleaved C3 and C5 was necessary. The sensitivity and specificity of the four ELISAs were tested with purified antigens and EDTA-plasma or Cobra venom factor-activated EGTA-plasma samples as a source of C3a and C5a. The detection limits were 1 ng/ml for C3, 1 ng/ml for C3a, 2 ng/ml for C5, and 100 pg/ml for C5a. Plasma samples from patients undergoing cardiopulmonary bypass (CPB) surgery were used as a source of pathological material.

Anaphylaxis↗
PubMed1988

In vivo effects of C3a on neutrophils and its contribution to inflammatory lung processes in a guinea-pig model.

C3a, when injected intravenously in guinea-pigs, caused a rapid drop of circulating neutrophils and platelets. The neutropenia was reversible and followed by a neutrophilia, which reached about 200% of baseline values. Upon challenge with octa- and hexapeptide, mimicking the C-terminal sequence of C3a, neutrophils and platelets reacted in the same manner. The hexapeptide-desArg (pentapeptide without the C-terminal arginine of hexapeptide) induced no neutropenia but a significant neutrophilia. Likewise, when injected in animals with a genetic deficiency or dysfunction of the C3a-receptor, the hexapeptide caused no drop of the neutrophils, but a neutrophilia, indicating that both neutrophil reactions are mediated by different mechanisms. With the octapeptide in vivo dose-response studies were performed. Despite maximal doses of octapeptide about 40% of the neutrophils remained in circulation, indicating that some but not all PMNs are susceptible to C3a. By pretreating the animals with an inhibitor of the serum carboxypeptidase N (SCPN-Inh) the C3a-induced neutropenia could be significantly augmented. But intravenous application of the inhibitor itself caused a 20-40% reduction of neutrophils during the first hour after injection, followed by a neutrophilia. In histological studies the timecourse of neutrophil sequestration in the lung was established, showing that the initial high neutrophil content of the lung lasted for at least 1 h and declined thereafter. Structural derangements could not be detected. These observations stress the importance of C3a besides C5a as an important mediator of inflammatory processes in species, where the C3a-receptor is present on inflammatory cells such as granulocytes.

3-Mercaptopropionic Acid↗
PubMed1987

[Neoplastic jaundice. Percutaneous transhepatic approach to biliary endoprosthesis. 39 cases].

Over a 5-year period attempts at transhepatic introduction of a biliary endoprosthesis were made in 39 inoperable patients. The procedure was in 3 stages: transhepatic cholangiography, passage through the stenosis and positioning of the prosthesis. Stenosis was intrapancreatic in 20 cases, pedicular in 9 cases and hilar in 10 cases. The endoprosthesis was successfully set in 20 cases (51%), the success rate being related to the level of the obstacle: intrahepatic 60%, hilar 30%. Failure was more frequent in patients with right liver metastasis, cholangitis or prior unsuccessful palliative surgery. The prosthesis was effective for 1 month in 17 patients and for 6 months or more in 7 patients, two of whom were followed up for 14 and 18 months respectively. Provided patients are better selected and the procedure is used mainly for cholangiocarcinomas, we see no reason why the transhepatic route (combined, if necessary, with endoscopy) should no longer be used to introduce biliary endoprostheses.

Aged↗
PubMed1985

[Value of ultrasound-guided cytopuncture in the diagnosis of tumors in cirrhosis. Study of 29 cases].

Ultrasonically guided fine needle aspiration biopsy is known to be of great value in the diagnosis of malignant liver disease, with an overall accuracy rate of 73-94 p. 100. However, investigators have essentially reported cases of liver metastases. In this report, we examined the diagnostic value of this method in the specific case of tumors associated with cirrhosis. Twenty-seven patients with cirrhosis (20 alcoholic, 4 post-hepatitis, 3 hemochromatosis) with ultrasonically suspected hepatic malignancy were studied. They all presented severe blood clotting disturbances and/or ascites. At the end of the study, all patients had proven malignancy (by post mortem biopsy in 14 cases and/or serum AFP greater than 500 microgram/l in 17 cases). There were 25 primary and 2 metastatic tumors. Twenty-nine fine needle aspiration biopsies were performed under ultrasonic guidance. material suitable for cytologic evaluation was obtained in 25 patients. In 14 cases, a diagnosis of malignant involvement of the liver was firmly established by cytological examination; it was suggested in 4 other cases. Tumor typing was possible in 12 primary and 2 metastatic tumors, in agreement with the proven diagnosis. The present study shows that fine needle aspiration biopsy under ultrasound guidance is a safe and accurate diagnostic procedure in malignant liver disease associated with cirrhosis.

Adult↗
PubMed1984

Five-year surveillance of aminoglycoside usage in a university hospital.

Because an increased incidence of nosocomial bacteremia due to gentamicin-resistant organisms occurred in our hospital, amikacin was substituted for gentamicin as the primary empiric aminoglycoside. Prospective surveillance of aminoglycoside use and of bacterial resistance to aminoglycosides was done before and after the substitution. We compared the baseline period when gentamicin was the primary aminoglycoside with the subsequent period when amikacin accounted for 81% of aminoglycoside used. During the two periods the patient population did not differ with regard to indications for aminoglycoside therapy. Among the gram-negative organisms isolated, rates of amikacin resistance during the baseline (1.1%) and usage (1.05%) periods were not significantly different (p greater than 0.6). Resistance to gentamicin and tobramycin during the period of amikacin use showed a statistically significant decrease (p greater than 0.001) due to decreased resistance to gentamicin of Providencia, Serratia, indole-positive Proteus, and decreased resistance to tobramycin of Pseudomonas aeruginosa. Unrestricted use of amikacin does not necessarily lead to increase in amikacin resistance but may lead to a decrease in resistance to gentamicin and tobramycin among gram-negative organisms.

Amikacin↗
PubMed1983

Experimental hepatic iron overload in the baboon: results of a two-year study. Evolution of biological and morphologic hepatic parameters of iron overload.

Four baboons receiving intramuscular iron for 15 months were compared with two control baboons. From the overall two-year observation period the following data emerge: (1) The baboon is a suitable animal for obtaining a massive and chronic iron overload. Liver iron concentrations reached very high levels (ranging from 41.3 to 180.6 mumol/100 mg dry weight vs 1.7 +/- 0.5, mean +/- SEM, in controls), and a major liver iron overload (ie, with concentration values greater than or equal to 18) was present in all four animals for an average period of 16.5 months (range 14-19). (2) When compared with human hepatic iron-overload disorders, iron distribution was similar to that observed in secondary (transfusional) hepatic siderosis since iron deposits were found primarily in sinusoidal cells. However, a marked parenchymal siderosis was also obtained close to that observed in primary (genetic) siderosis. Iron toxicity was present biologically as indicated by an increase in serum transaminases. Histologically, a slight fibrosis was observed in the most heavily iron-overloaded baboon. On the whole, this study of subhuman primates brings new evidence that iron per se has only a minor hepatic damaging effect. It also suggests that the iron-overloaded baboon liver provides a promising tool for the study of liver cell disturbances in human iron overload.

Animals↗
PubMed1982

[Intestinal bypass in the treatment of obesity. Results of 14 cases (author's transl)].

Fourteen women with severe obesity resistant to previous dietetic measures underwent intestinal bypass using Scott's method. Weight loss ranged from 1-2 kg to 50 kg (mean = 25 kg) but weas unpredictable and varied from patient to patient; most remained obese. The other results of the operation were similar to those already reported. There was a decrease in total plasma cholesterol, while HDL cholesterol remained normal. Calcaemia was in the lower range of normal values; one patient developed severe hypokaliaemia (1.8 mEq); low blood magnesium levels and steatorrhoea were common. Fibrosis of the liver was observed in one patient and probably in another. Five patients were re-operated upon for incisional hernia or intestinal occlusion. Other complications reported in the literature (pulmonary embolism, arthralgias, kidney stones and gall stones) did not occur in this series. Because of these complications we decided to stop using intestinal bypass for the treatment of severe obesity. However, in view of the potential dangers of severe obesity we feel that other surgical techniques, such as Mason's gastric bypass, should be considered in some patients.

Adult↗
PubMed1981

Assessment of liver iron content in 271 patients: a reevaluation of direct and indirect methods.

Two direct methods for hepatic iron assessment (liver iron concentration and stainable liver iron--judged by a new histologic grading) and three indirect methods (serum iron and transferrin saturation, deferoxamine-chelation test, and ferritinemia) were reevaluated in 271 patients. These patients consisted of: 103 with idiopathic hemochromatosis, 39 with alcoholic cirrhosis, 54 with noncirrhotic alcoholic liver diseases, 13 with nonalcoholic liver diseases, and 62 with miscellaneous disorders. The results indicate that: (a) liver iron concentration, well correlated with mobilized excess iron (r = 0.88; p < 0.01), is the method of reference and validates the proposed histologic grading; (b) serum ferritin, which is in good correlation with liver iron concentration (r = 0.80; p < 0.01), is a valuable indirect method for hepatic iron evaluation; (c) regarding the other indirect methods a "boundary zone" may be delimited, thus corresponding to liver iron concentration values of 10.7 mumol/100 mg dry liver weight, beyond which values of serum iron less than 28.6 micrometer or transferrin saturation less than 45% or chelatable iron less than 45 mumol/24 h are rare; and (d) using the various indirect methods, there is a marked risk in idiopathic hemochromatosis to underestimate and in alcoholic liver diseases to overestimate hepatic iron content.

Deferoxamine↗
PubMed1980

Perhexiline maleate toxicity on human liver cell lines.

When added to the culture medium of human liver cell lines, perhexiline maleate induced formation of numerous myeloid bodies containing unicentric or multicentric smooth membranes within a few days. The nine lysosomal enzyme activities studied, except for beta-galactosidase which decreased, remained unchanged. These results indicate that on cultured human liver cells perhexiline maleate has an effect similar to that described on hepatocytes of some patients treated with this drug and suggest that myeloid body formation is not due to impairment of lysosomal enzyme activities.

Adult↗