Characteristics of a chamber used for electrooptical device performance measurements in the presence of fog

A fog chamber, developed to support measurement of the performance of electrooptical devices in the presence of fog, is discussed. Rationale for the fog chamber concept is presented. Emphasis is placed on the theory of operation of the chamber, an optical method for assessing fog particle characteristics, and the optical properties of the different types of fog produced.

Cimetidine and gastric ulcer healing: a double-blind controlled trial

The effect of cimetidine in the daily dose of 1200 mg on the healing rate of chronic gastric ulcer was assessed in a randomized double-blind trial in 48 patients. Cimetidine was found to accelerate the healing of chronic gastric ulcers in the ambulant patients, but it conferred no additional benefit on the patients in hospital. No significant side effects were observed.

Chronic erosive (verrucous) gastritis. A study of 108 patients

Chronic erosive gastritis (C.E.G.) is a gastric mucosal lesionwith characteristic radiological and endoscopic appearances. Pyloric gland hyperplasia is seen on histological examination of biopsy specimens. C.E.G. is uncommonly reported in the English literature. In reviewing 3,800 upper gastro-intestinal endoscopies from 1971--1976, 108 patients were diagnosed as having typical features of chronic erosive gastritis, an incidence of 2.8%. There was a significant association with duodenal ulceration and an overall male predominance. The lesion can also co-exist with gastric ulceration and has been observed as an incidental finding in patients examined urgently for upper gastro-intestinal bleeding. In this context C.E.G. should be distinguished from acute mucosal erosions. Symptoms may relate to the accompanying peptic ulceration, although dyspepsia epigastric pain, fullness and nausea may possibly occur with C.E.G. alone.

Double contrast upper gastrointestinal studies

A technique for routine hyptonic double-contrast studies of the upper gastrointestinal tract is described. It is emphasized that, to achieve consistent success, the principles of the technique must be understood and applied at the time of the examination. The various factors producing the barium coating effect are described. Gas distension and bubble control are also described. Where applicable, the principles and projections are demonstrated by examples. Endoscopy with biopsy has added a new dimension of accuracy to diagnosis and is replacing barium studies for acute upper gastrointestinal haemorrhage. Accurate barium studies are important as a screening test of other symptomatology to select patients for further clarification by endoscopy.

The foundation of a college. The conception, birth, and early days of the College of General Practitioners

Images

Fraser Mackintosh Rose

Images

Religion and the family doctor

Images