Biomedical subjects

T Kasano

Publications and source records attributed to T Kasano.

16 recordsLinked to original sources

PubMed1994

Relationship between Helicobacter pylori and atrophic gastritis.

OBJECTIVES: To investigate the relationship between Helicobacter pylori and atrophic gastritis. DESIGN AND METHODS: The extent of atrophic gastritis was assessed endoscopically in 97 non-ulcer patients, and their H. pylori status was assessed by enzyme-linked immunosorbent assay. RESULTS: The prevalence of H. pylori infection was greatest in the early stages of atrophic gastritis. Small numbers of H. pylori-negative patients were identified at different stages during the extension of atrophic gastritis. CONCLUSIONS: H. pylori infection precedes the extension of atrophic gastritis, and a minority of patients with atrophic gastritis may never have been infected with H. pylori.

Adolescent↗

PubMed1993

Endoscopic ultrasonographic (EUS) evaluation of the quality of gastric ulcer healing.

EUS provides cardinal tomographic findings of gastric ulcer such as low echo mass (ulcer echo), thickening of the wall, a symmetrical or asymmetrical convergence of the submucosal layer, and a sharp (pin-point) or blunt (broad-surface) convergence, variously expressed in accordance with the depth or width, and also with the history of recurrence of ulcer. A low echo mass, or an ulcer echo histopathologically consists of fibrosis and granulation, sonographically correlating well with the thickening of the wall. Seventy nine cases of ulcer scar, 52 of which were evaluated endoscopically as S1 (red scar) and 27 as S2 (white scar), were scanned by EUS. The incidence of high quality healing recognized on EUS with complete disappearance of a low echo mass and subsidence of the wall thickness was 21.2% (11 of 52 ulcer scars) in the S1 stage group, which remarkably increased up to 70.4% (19 of 27) in the S2 group (P < 0.01). The results indicate a definite correlation between endoscopic and EUS assessment of an ulcer scar state. The cumulative relapse rate at 12 months during maintenance therapy with half doses of H2 blocker was found to be 4.5% (1 of 22 cases) in the group with high quality healing on EUS, 40.9% (9 of 22) in the group with fair quality healing, and 75.0% (12 of 16) in the group with poor quality healing. The results of the present study suggest that EUS assessment may be a reliable and objective predictor of susceptibility to ulcer recurrence, accurately evaluating the quality of gastric ulcer healing.

Gastroscopy↗

PubMed1993

Relationship between Helicobacter pylori colonization and acute inflammation of the duodenal mucosa.

A relationship between Helicobacter pylori colonization and acute inflammation of the duodenal mucosa was studied in 75 patients with duodenal ulcer and nine with endoscopically normal duodenal mucosa. A biopsy of the duodenal bulb in each patient was used for both detection of H. pylori and histological assessment of acute inflammation [polymorphonuclear leukocyte (PMN) infiltration and regenerative changes of the duodenal epithelial cells]. Biopsies with regenerative changes showed a marked PMN infiltration, regardless of the duodenal H. pylori status. In biopsies without regenerative changes, H. pylori colonization was closely associated with PMN infiltration. Acute inflammation in the duodenal mucosa surrounding ulcers is caused mainly by acid, but our data suggest that H. pylori is another important factor in the development of PMN infiltration in the duodenal mucosa.

Biopsy↗

PubMed1991

Clinical evaluation of endoscopic hemostasis for bleeding gastric and duodenal ulcers.

The present study shows the excellent efficacy of endoscopic hemostatic therapy by ethanol injection. At the same time, the results emphasize the significant efficacy of intensive pharmaceutical treatment for peptic ulcer patients with clinical symptoms of hematemesis and/or melena. Concerning endoscopic hemostatic therapy, we prefer ethanol injection therapy to most other methods, such as laser irradiation, microtase or heat probe, because the ethanol injection method is the most simple, inexpensive, safe, technically easy, can be performed any time and in any place, and is more effective than other methods. In rare cases where direct ethanol injection into the exposed blood vessels is difficult, we do not hesitate to select other contact methods such as heat probe or microtase.

Endoscopy, Digestive System↗

PubMed1991

[Relationship between morphological and functional changes in the stomach with aging].

The authors investigated the relationship between morphological changes and functional changes of the stomach with ageing, especially in term of change of gastric emptying in 92 healthy subjects. We checked the difference in chronological age and the stomach age in these subjects (in order to assess these subjects). The morphological change was evaluated by extent of atrophic gastritis in endoscopical atrophic border and histological findings of biopsy specimens, and the functional change was evaluated by maximal acid output in gastric secretion. Atrophic gastritis was expanded and maximal acid output was significantly reduced with ageing. From these results we confirmed that there was no difference between the chronological age and the stomach age and the quality of these subjects was very good. Gastric emptying was investigated by the acetaminophen method. In spite of ageing, gastric emptying was almost constant in these healthy subjects.

Adult↗

PubMed1991

[Effect of a proton pump inhibitor AG-1749 (lansoprazole) on intragastric pH: 24-hour intragastric pH monitoring].

Proton pump inhibitors, as agents for use against peptic ulcers, potently suppress gastric acid secretion, as is the case with H2 receptor antagonists. To evaluate this antisecretory action as objectively as possible, intragastric pH was continuously monitored during 24 hours. Eight subjects were enrolled and divided into 2 treatment groups: a group receiving a daily dose of 30 mg of AG-1749 (lansoprazole) and the other group receiving 60 mg. Intragastric pH recording was made in each subject before and after the consecutive administration of the drug, and the corresponding pH holding time was calculated to evaluate the effect obtained in each group. The result indicated that the proportion of time in 24 hours after medication during which the pH was maintained above each level was significantly larger than that after placebo administration, and the duration of action was superior to that of H2-receptor antagonists. From the above, it was concluded that the consecutive administration of ag-1749, at doses of 60 mg as well as 30 mg, exhibits excellent antisecretory action in terms of intragastric pH control.

2-Pyridinylmethylsulfinylbenzimidazoles↗

PubMed1991

A topographical relationship between Helicobacter pylori and gastritis: quantitative assessment of Helicobacter pylori in the gastric mucosa.

A topographical relationship between the number of Helicobacter pylori in the gastric mucosa and the histological severity of gastritis was studied in 902 pairs of biopsy specimens taken from 314 patients. A pair of biopsies were taken from the antrum, the lesser curvature of the middle body, and the greater curvature of the upper body of the stomach. The quantitative assessment of H. pylori was made based on smear, culture, and tissue section. The histological severity of gastritis was assessed as to the degrees of mononuclear cell and polymorphonuclear leukocyte infiltration. A positive correlation was confirmed between the number of H. pylori and the severity of polymorphonuclear leukocyte infiltration. The degrees of inflammatory cells infiltration in the specimens with H. pylori colonization were significantly lower in the upper body than in the antrum.

Adolescent↗

PubMed1989