Duodenal hematoma: the ring sign in MR imaging

Proper management of duodenal hematoma requires that an accurate diagnosis be made using noninvasive radiological methods. Conventional imaging may be nonspecific if there is no history of trauma or coagulopathy. Two cases of duodenal hematoma that were imaged by magnetic resonance (MR) and computed tomography (CT) are described. In both cases the hematoma had a well-defined concentric ring configuration on MR images, a finding which helped establish the diagnosis. MR imaging may provide tissue-specific characterization of duodenal hematomas.     

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Berufsrechtlich unzulässiger Gesellschaftszweck in Gesellschaftsvertrag einer ärztlichen Berufsausübungsgemeinschaft

Abstrakt  Gründen ?rzte nur deshalb eine Gesellschaft bürgerlichen Rechts, um einem Arzt Gelegenheit zu geben, an Erl?sen beteiligt zu werden, die der andere Arzt mit Leistungen erwirtschaftet, die der beteiligte Arzt mangels eigener Qualifikation nicht erbringen darf, und fehlt es weiter an den wesentlichen Merkmalen einer Berufsausübungsgemeinschaft, ist der zugrunde liegende “Gesellschaftsvertrag” wegen Versto?es gegen § 134 BGB nichtig. (Leitsatz des Bearbeiters)     

Effect of prolonged topical application of vancomycin on human oral Streptococcus mutans populations.

Changes in oral Streptococcus mutans populations were recorded in conjunction with a one-year clinical trial of the anticaries activity of topically applied vancomycin. At the outset, 268 children aged 9–11 years were randomly assigned to the experimental or control group. Subjects in the experimental group were treated with a 3 per cent vancomycin gel applied in pretrimmed plastic trays for 5 min on school days. Plaque samples were taken every 4–6 weeks over a 12-month period from one sound occlusal surface, two sound approximal surfaces and one sound smooth surface. The surfaces assayed were the same at each sampling. Strep. mutans populations were determined in these samples using a selective medium. Significant reductions in numbers were observed consistently in occlusal surfaces. Sporadic and less pronounced effects were detectable on approximal and smooth surfaces. The treatment effects disappeared when treatment was suspended during the summer and re-appeared when treatment was resumed after the vacation.     

The reliability of the iodide permeability test applied to the natural dentition

The purpose of this study was to assess the reliability of the iodide permeability test when applied to the human dentition. Twenty-two subjects were seen once a week for three weeks. At each visit, consecutive iodide permeability measurements were obtained: four from the right central incisor and four from the left. Results of these trials were examined for the degree of variability from one replication to another within the same day, as well as for the variability from one week to the next. Within-day and between-week reliability of the test results was assessed by two indices: the Hoyt Index, which estimates the reliability of the average of the four replicate measurements per tooth, and the Intraclass correlation, which estimates the reliability of a single measurement. The results indicate that the iodide permeability test produces sufficiently replicable measurements for use in future clinical studies.     

Esophageal strictures in children: treatment by serial balloon catheter dilatation

Grüntzig balloon catheters were used to dilate ten esophageal strictures in eight infants and children. Five infants who had anastomotic strictures following esophageal atresia repair gained complete resolution of their strictures, usually after one or two dilatations. Three older children who had strictures following esophageal re-operation or reconstruction required longer courses of dilatations to achieve consistent esophageal patency. The technique failed in two chronic strictures of two and one-half and nine years' duration. Balloon catheter dilatation, begun in the early postoperative period, is a safe, effective method for dilating esophageal strictures.