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Biomedical subjects

J L Jost

Publications and source records attributed to J L Jost.

64 records · Page 4Linked to original sources
PubMed1972

Predator-prey interactions of Dictyostelium discoideum and Escherichia coli in continuous culture.

Dictyostelium discoideum and Escherichia coli were aerobically propagated in mixed continuous culture in a predator-prey relationship, and the effects of temperature and holding times were examined. Oscillations developed in the concentration of glucose, the limiting substrate for E. coli, and in the densities of the two populations, but eventually steady-state populations were reached. The experimental data were analyzed according to the Lotka-Volterra model for prey-predator relationships and by the Monod model for saturation kinetics. A comparison of the adequacy of the two models in describing predation is given.

Aerobiosis↗
PubMedDate not supplied

[Traumatic perforation of the rectum below the peritoneum (author's transl)].

The authors report a case of traumatic subperitoneal perforation of the rectum, the diagnosis of which was made by finding a pneumoperitoneum on straight X-rays of the abdomen, and on rectal examination. In these cases the pneumoperitoneum is generally bilateral occupying the posterior pararenal space. The course was favourable under medical treatment.

Aged↗
PubMedDate not supplied

[Four original cases of splenic venous infarction during pancreatic disease (author's transl)].

The authors report 4 cases of splenic complications occurring during chronic pancreatic disease and emphasize the vascular origin of the lesions observed in the spleen whether rupture, pseudo-cysts, hematic cysts, infarction or necrosis. The symptoms in each case seemed identical in their pathogenesis and linked to trunkular or radicular splenic venous thrombosis.

Chronic Disease↗
PubMedDate not supplied

[Gastric MALT lymphoma of low-grade malignancy. Apropos of 4 surgically treated cases].

From 1990 to 1993, programmed surgery was performed in four patients with histologically low grade malignant gastric lymphomas of mucosa-associated lymphoid tissue (MALT) (partial gastrectomy = 1, total gastrectomy = 3). These small cell lymphomas have the B phenotype and are uncommon. The clinical course is usually slow and classically limited to the stomach. As for other gastric lymphomas, there is still a certain amount of discussion as to the best therapeutic choice between surgery, chemotherapy and radiotherapy. Certain elements in the literature can help in managing these low grade gastric lymphomas. Recent publications report on a prospective study on primary lymphomas of the digestive tract, a clinical trial on single drug chemotherapy alone and the relationships between Helicobacter pylori and MALT lymphoma.

Adult↗
PubMedDate not supplied

[Annular stenosis of the main bile duct after laparoscopic cholecystectomy].

Although celioscopic cholecystectomy provides acknowledged advantages, lesions of the common bile duct appear to be more frequent with this technique than with laparotomy. Two cases of annular stenosis of the common bile duct after celioscopic cholecystectomy are presented. Evidence of their ischemic origin is available, and they lead to reflexions on the use of monopolar coagulation. In both cases, the stenosis was repaired surgically, with resection and anastomosis in one case and with a hepaticojejunal anastomosis in the other. Laying an endoprosthesis as used in case 2 seems to be interesting as a temporary solution to prepare for surgery.

Adult↗
PubMedDate not supplied

[Medico-legal implications of ambulatory surgery].

Public opinion maintains the myth that ambulatory surgery is a benign operation. Although it may not be the ideal moment for demonstrating exceptional technical skill, there are unpredictable factors and certain limitations. To date, no specific legal concept of medical appraisal applicable to ambulatory surgery has been developed in France. Nevertheless, the nation that the surgeon is required to use all possible means is keenly accentuated because in a very short delay of a few hours the patient no longer is under direct management of the surgeon or his health care team. The aim of this work was to summarize the mandatory techniques for quality care and safety adapted to the lesions and the circumstances and taking into account accepted procedure, the current state of the art and the socio-familial environment. Two specific problems are encountered in the medical appraisal: a) defining whether the complication is inherent to ambulatory surgery, b) deciding how the responsibility could be shared. The possibility of special insurance for demonstrated non-fault surgical risk would be an elegant solution to avoid legal bias and facilitate controlled development of ambulatory surgery units.

Ambulatory Surgical Procedures↗