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Biomedical subjects

L B Svendsen

Publications and source records attributed to L B Svendsen.

104 records · Page 6Linked to original sources
PubMed1979

Antrectomy as treatment of recurrence after vagotomy for duodenal ulcer.

Sixty-eight patients antrectomized for recurrent ulcer after different types of vagotomy were reexamined two to ten years after the operation. Mortality after antrectomy for recurrent ulcer was 1.5 per cent (95 per cent confidence limits, 0.0 to 7.9 per cent), the recurrence rate 2.9 per cent (0.4 to 10.2 per cent), and total failure rate (Visick IV) 13.0 per cent (0.4 to 25.6 per cent). If these figures are applied to a series of 260 proximal gastric vagotomies recently reported from our department and compared with data from series of vagotomy-antrectomy as primary treatment of duodenal ulcer, the final surgical mortality and cure rate will be equal, whereas the final failure rate (Visick IV) probably would be less after proximal gastric vagotomy because of a lower frequency of dumping and diarrhea.

Adult↗
PubMed1979

Gastric ulcer therapy with a pepsin-inactivating peptide, pepstatin: a double-blind randomized clinical trial.

Sixty consecutive patients with gastric ulcer were studied at random after treatment with 100 mg pepstatin or 100 mg placebo seven times a day at fixed hours and controlled 2, 4, 8, and 12 weeks after initial diagnosis. Examinations comprised clinical symptoms and endoscopic evaluation of ulcer healing. Eight patients were withdrawn from the study. Ulcer healing and symptoms were better with placebo than with pepstatin, but a type-2 error of a 10% effect in favour of pepstatin may be overlooked. In gastric ulcer treatment, pepstatin seems to be of only fringe benefit, if of any benefit at all.

Clinical Trials as Topic↗
PubMed1979

Cell proliferation in normal and diseased gastric mucosa. Autoradiography after in vitro continuous labelling with tritiated thymidine.

The rate of gastric epithelial cell proliferation was studied in healthy volunteers and in patients with different degrees of gastritis. Endoscopic biopsies from the antral and fundic part of the stomach were incubated in vitro with 3H-thymidine for 30, 120, and 210 minutes respectively. Autoradiographs were prepared, and the percentage of DNA-synthesizing cells (labeling index) in the progenitor cell region was estimated. From the successive labeling indices the rate of entry of cells into DNA-synthetic phase (S-phase) and the duration of the S-phase could be estimated. All the biopsies were classified according to the degree of gastritis. The mean (+/-SEM) length of the S-phase was found to be 7.4 +/- 0.3 hours in antral mucosa and 7.2 +/- 0.4 hours in fundic mucosa. There was no significant difference between the S-phase duration in normal mucosa, superficial gastritis, mild atrophic gastritis and severe atrophic gastritis. This observation suggests that the labeling index can be used as an expression for the rate of cell proliferation in human gastric mucosa. A significant correlation between the labelling indices and the degree of gastritis was found in both antral and fundic mucosa. In six cases, labelling indices estimated by cell counts performed on longitudinal or cross sections of foveolae were compared. Ther was no significant difference between the results obtained by the two different counting techniques.

Adult↗
PubMed1978

Changes in gastric mucosal cell proliferation after antrectomy or vagotomy in man.

The rate of gastric epithelial cell proliferation was studied in peptic ulcer patients treated by partial gastrectomy or proximal gastric vagotomy (PGV). Endoscopic biopsies were incubated in vitro with 3H-thymidine and autoradiographs were prepared. The percentage of DNA-synthesizing cells (labeling index) in the progenitor cell region was estimated. Five patients were studied before and 3 months after antrectomy, whereas six other subjects were studied before and 2 weeks and 2 months after PGV. The results indicate that epithelial cell proliferation in fundic mucosa is accelerated after antrectomy in man and that PGV is followed by an increased rate of cell renewal in fundic and antral mucosa, whereas the kinetic parameters in duodenal mucosa remain unaffected by this operation. It is concluded that the proliferative changes after these operations are most likely caused by the development of gastritis. The study did not support the hypothesis that gastrin exerts a physiological trophic action on human gastric mucosa.

Adult↗
PubMed1977

Relationship between gastric acid secretion, histopathology, and cell proliferation kinetics in human gastric mucosa.

Cell proliferation of gastric antral and fundic mucosa was studied in a series of patients with different gastric diseases. After in vitro incubation of endoscopic biopsies with tritiated thymidine, radioautographs were prepared by the dipping technique. The labeling indices were estimated, and the biopsies were classified according to the degree of gastritis. The peak acid output after "maximal" stimulation with histamine was also determined. A highly significant inverse correlation between peak acid output and the labeling indices in both antral and fundic mucosa was demonstrated. The correlation between the degree of gastritis and the labeling indices in antral and fundic mucosa was also statistically significant. The results indicate that a significant inverse relationship exists between the acid secretory capacity of the gastric mucosa and the rate of cell proliferation in both antral and fundic mucosa. Furthermore, the data suggest that an increasing degree of gastritis in human gastric mucosa is followed by an increased rate of epithelial cell proliferation.

Adult↗
PubMed1976

Effect of a pepsin-inhibitory pentapeptide upon the peptic activity and acidity of gastric secretion.

The effect of a pepsin-inhibiting pentapeptide, pepstatin, upon the peptic activity and gastric acidity was investigated in 9 men with ulcer dyspepsia and a high acid output. Subtotal inhibition of peptic activity was obtained, basally as well as after broth stimulation, as early as 15 minutes after the method of administration, and the inhibition remained almost unchanged during the 60 minutes of the experimental period. The acidity was not affected by pepstatin. No side-effects occurred. The results confirm preliminary reports on the pepsin-inhibitory activity of the drug. It is concluded that pepstatin ought to be investigated with regard to its clinical effect upon peptic ulcer.

Adult↗
PubMedDate not supplied

The establishment of an HNPCC register.

Guidelines for the establishment of an HNPCC-register are presented. The aims of a register are discussed. Steps in identification of families and persons at risk are suggested, and possible sources of family and pedigree data are mentioned. The role of a register in surveillance, information of family members and medical colleagues, research and international collaboration are discussed.

Colorectal Neoplasms, Hereditary Nonpolyposis↗