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Biomedical subjects

C Meyer

Publications and source records attributed to C Meyer.

At least 487 records · Page 27Linked to original sources
PubMed1984

[Acute hemorrhagic necrotizing pancreatitis. Analysis of 58 patients].

The authors stress the therapeutic importance of peritoneal lavage for eliminating toxic substances from the abdominal cavity. In cases of a stenosing papilla or an impacted gallstone, endoscopic papillotomy and stone extraction are recommended. The indication for surgical interventions, like nekrosectomy or segmental resection of the pancreas, are discussed in detail. In case of diffuse recurrent peritonitis the technique of the "open abdomen" should be taken into consideration. The results of 44 resections and 14 necrosectomies are represented. The overall mortality rate comes up to 35 or 40% respectively.

Acute Disease↗
PubMed1983

Coronary rheothermia: a quasi non-invasive method for controlling bypass patency.

A method based on the principle of thermodilution was developed for a quasi non-invasive permeability control of aortocoronary bypass. An epivascularly-attached thermistor records the cooling of the bypass wall when, following the intravenous injection of 5 to 10 ml of a NaCl solution at 4 degrees C, a bolus of cooled blood passes through the bypass. During cardiosurgical intervention, the thermistor is attached to the venous bridge by one or 2 sutures. The efferent cable goes through the thorax wall and is coupled to a subcutaneously implanted telemetric amplifier unit. The influence of the vessel wall on the perivascular temperature signal, as compared to the intravascular one, was studied in acute and chronic animal experiments. In acute experiments the perivascular peak of temperature was found to be lower than the intravascular one. Continuous measurements over 9 days showed variations in the perivascular signals which must have been due to changes in the thermal capacity of the tissue coupled to the thermistor as well as to changes in resistance caused by a variable extent of scarred area and by the varying water content of the wound bed. These variables will continue to keep rheothermia within the limitations of a method with primarily binary results (= bypass: open or closed). Given stable coupling conditions after full development of the scar around the thermistor, the signal falsification by the then constantly coupled tissue capacity becomes calculable such as to obtain semiquantitative results which, theoretically should vary predominantly with cardiac output.

Animals↗
PubMed1983

Interferon as an in vitro modifier of immune responses induced by combined vaccine (DTP) in mice.

The ability of DTP (diphtheria, tetanus, pertussis) vaccine to stimulate IgG-plaque forming cells (PFC) in mice was markedly inhibited by human leukocyte and mouse fibroblast interferon (IF). This effect of IF was not dose-dependent. The maximum inhibitory effect of human IF was observed on Day 10 after the administration of the vaccine. The inhibition of IgM-PFC was more severe when human IF was used. Although IF abrogated the effect of DTP vaccine on IgG-PFC, at the same time it stimulated PFC in the control group of non-vaccinated animals. The administration of DTP vaccine decreased IgM-PFC on Day 5, the effect was enforced by the addition of both human and mouse IF. IF decreased IgM-PFC in the control group. Small and large doses of DTP suppressed the leukocyte adherance inhibition (LAI) on Day 5 after administration of the vaccine, the effect was not affected by addition of IF. The suppressive effect of DTP was lost on Day 10 when addition of IF increased the percent of LAI in all experimental groups. Thus IF appears to interfere with the effect of DTP and selectively modulate the different immune responses.

Animals↗
PubMed1983

Cell cycle associated changes in histamine release from rat basophilic leukemia cells separated by counterflow centrifugal elutriation.

This study evaluated histamine release from cells at different stages of the cell cycle. Cells from the cloned rat basophilic leukemia subline (RBL-2H3) were fractionated by counterflow elutriation according to size and density. The smallest cells were predominantly in the G1 phase of the cell cycle. These cells contained the least histamine and after IgE-mediated triggering released the lowest fraction of their total histamine. In contrast cells in the S, G2, and M stages were larger, contained more histamine and released more of their histamine after activation. When G1 stage cells were recultured, there was an increase in cell size, in histamine content and histamine release. Therefore, there is heterogeneity in the capacity of cells for IgE-mediated triggering at different stages in the cell cycle, with optimal release from the more mature cells.

Animals↗
PubMed1983

[Surgical treatment of acute necrotizing hemorrhagic pancreatitis. Analysis and prospective deductions on 58 cases].

Three degrees of severity could be recognized in 58 patients operated upon for severe acute hemorrhagic pancreatitis, based on results of intensive care, particularly anti-shock therapy, wide peritoneal lavage, and possible need for endoscopic relief of sphincter of Oddi obstruction due to a stone. The principal parameters evaluated were clinical and biological features and the course of the affection. As a result of these data, 44 pancreatic resections of variable extension and 14 excisions of necrotic tissues were performed. Results of these two types of operations, as well as the dominant causes of postoperative and secondary deaths, are analyzed in detail. The indications for surgery are discussed, together with the tactical methods to be applied as a function of the general condition and the detailed study of the pancreas and the state of the adjacent organs. Particular importance should be attached to the presence of respiratory insufficiency. The possible need for routine biliary external drainage is discussed, and the major role played by parenteral nutrition, which should be initiated as early as possible, is emphasized. These findings suggest that two fundamental principles should guide surgery of acute hemorrhagic pancreatitis: the need for surgery in selected cases, though over-aggressive operations should be avoided, and, more particularly, the concept, to be shared of the need for repeated operations, enabling avoidance of excessive procedures during initial surgery.

Acute Disease↗
PubMed1983

[Colonic occlusions. Retrospective cooperative study of 497 cases].

A retrospective multicenter study involving 12 digestive surgery centers was conducted on 497 cases of colon obstruction. The most frequent cause of colon obstruction was colo-rectal cancer (71 p. cent of cases), but many other etiologies were involved, including 61 cases of torsion and 37 patients with occlusive sigmoiditis. Differential clinical and radiological features in each etiological group are discussed, the results of therapy undertaken analyzed, and a reasonable line of conduct proposed, adapted to each situation, with the objective of attempting to reduce mortality which still affects 25 p. cent of cases operated upon.

Adult↗