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Biomedical subjects

W Kruis

Publications and source records attributed to W Kruis.

At least 91 records · Page 5Linked to original sources
PubMed1992

Senna vs. bisacodyl in addition to Golytely lavage for colonoscopy preparation--a prospective randomized trial.

Colonoscopy preparation with lavage is a clinically accepted procedure. After having shown that its results can be improved by the additional intake of Senna this randomized prospective trial was designed to evaluate the effects of different laxatives in a combined preparation regimen. The day before endoscopy either Bisacodyl or extractum Sennae was given to 120 patients. Immediately before examination all patients underwent whole gut irrigation with Golytely solution. Patient acceptance and effectiveness of the two procedures were excellent and no relevant intolerance was observed. Satisfactory cleansing results were achieved with Bisacodyl as well as with Senna (98.3 vs. 95%). There was no significant difference between the laxatives used. We conclude that both regimens are safe, generally well tolerated and effective ways of preparation for colonoscopy.

Adult↗
PubMed1991

[Immunoproliferative disease of the small intestine. A rare differential diagnosis of Crohn's disease].

For 2 years a 39-year-old Turkish man had had abdominal pain as well as weight loss of more than 10 kg over 4 months, associated with a raised ESR (33 mm/h) and recurrent gastrointestinal bleedings which endoscopy revealed to have been caused by a marked erosive duodenitis. Biopsies from the duodenum and terminal ileum demonstrated lymphoplasmocytic infiltration of the entire small intestine in the sense of immunoproliferative small intestinal disease (IPSID). By immunohistochemistry the lymphoplasmacellular infiltrate showed polyclonal expression of IgA without IgA increase in serum, urine and duodenal juice. The patient was treated with tetracycline (500 mg twice daily) for one year. The symptoms and histological lesions were much improved after 4 months. One year after diagnosis he was symptom-free.

Adult↗
PubMed1991

[Changes in fecal composition, intestinal transit, bile acid metabolism and intestinal fermentation in long-term nutrition with high molecular weight formula diet].

Treatment with formula diets becomes more and more popular in many patients. The influence of those diets on gut functions is as yet poorly known. We studied in ten healthy volunteers the effects of a high molecular liquid diet. Despite of a sufficient energy supply the volunteers lost significantly weight which may be related to an acceleration of small bowel transit (60 +/- 9 min vs. 31 +/- 5 min; control vs. diet period). Whole gut transit did not change significantly (52 +/- 3 h vs. 56 +/- 3 h). The fecal excretion of bile acids decreased significantly (293 +/- 35 mg/24 h vs. 151 +/- 10 mg/24 h) which was particularly due to a decrease of primary bile acids. The serum bile acid concentrations behaved in a similar way (total bile acids: 3.19 +/- 0.66 mumol/l vs. 1.71 +/- 0.21 mumol/l). Neither the determination of unconjugated serum bile acids nor hydrogen breath testing did indicate increase of bacterial growth. In conclusion, chronic nutrition with formula diets causes significant changes of gut functions.

Adult↗
PubMed1991

Adding more fluid to wheat bran has no significant effects on intestinal functions of healthy subjects.

To regulate intestinal transit, increased fluid intake, along with fiber is recommended. Considering the usually large volumes of intestinal secretion, this advice is questionable. To demonstrate the effects of adding fluid to fiber, 11 volunteers ingested 15 g of wheat bran twice a day, randomly given without or with 600 mL of additional fluid. Stool weight and frequency were similarly increased in the two settings. Gastric emptying was delayed by bran only when bran was given without additional fluid. Orocecal transit showed no significant changes. Whole gut transit was slightly more accelerated with added fluid (20.6 vs. 13.5%). No test showed significant differences in direct comparison of bran and bran with additional fluid. We conclude that in healthy persons, such effects of wheat bran as acceleration of transit and increase in stool weight and frequency do not depend on an additional intake of fluid.

Adult↗
PubMed1991

Effect of diets low and high in refined sugars on gut transit, bile acid metabolism, and bacterial fermentation.

Increasing consumption of refined sugar has been implicated in many gastrointestinal disorders on epidemiological grounds. Nine volunteers agreed to participate in a study comparing the effects of a diet containing 165 g refined sugar/day with a diet of only 60 g/day on gut transit, bile acid metabolism, and fermentative activity of the intestinal flora. The wet and dry weight, pH, and water content of the stools were similar on the two diets. On the high sugar diet mouth-to-anus transit time was significantly prolonged, despite a shortened mouth-to-caecum transit time. The faecal concentration of total bile acids and the faecal concentration of secondary bile acids increased significantly. Diet affected neither the serum bile acid pattern nor the concentration. Breath hydrogen tests showed significantly enhanced H2 production on the high sugar diet. We conclude that the quantity of refined sugar in the diet can significantly influence gut function and the composition of bowel contents.

Adult↗
PubMed1990

[Recent knowledge of the pathophysiology of inflammation in Crohn disease and ulcerative colitis: possible sequelae for future treatment concepts].

Increasing knowledge of intestinal inflammatory processes in inflammatory bowel diseases has been obtained in the last five years based on clinical, immunologic and biochemical studies. The intestinal inflammatory response presently is believed to evolve in three stages, the first being heralded by immunologic events, the second being characterized by the production of inflammatory mediators with amplification of this response, the third being led by destructive interactions of activated inflammatory cells with the gut epithelium. Pharmacologic intervention at each of these stages is regarded a desirable therapeutic goal in the absence of a known etiology. Phospholipase-A2 and lipoxygenase inhibitors, radical scavengers, mediator receptor antagonists or modification of mediators with less active derivatives are examples of recent developments. The next future, however, will show us, which of these concepts may be realized clinically.

Colitis, Ulcerative↗
PubMed1990

[Irritable bowel syndrome: questionnaires and scores].

The goals of questionnaires and scores differ. This article emphasizes their value in the diagnosis of the irritable bowel syndrome. In 1978, Manning et al. studied patients with the irritable bowel syndrome or organic disease with a questionnaire of 15 questions. Retrospective analysis of results showed that the presence of one or several characteristic symptoms can lead to the diagnosis of the irritable bowel syndrome. We evaluated a score system based on a 5 question questionnaire and a list of 8 investigations performed to eliminate organic disease. We were able to show that this score allowed to make the diagnosis of irritable bowel syndrome with accuracy because the specificity was 97 percent and the sensitivity was 83 percent. Similar results have been obtained in other studies. Moreover, a group from India has developed a system based on 19 questions which has also proved to be very accurate in the diagnosis of the irritable bowel syndrome.

Abdominal Pain↗
PubMed1989

Colonic N-acetylation of 5-aminosalicylic acid in inflammatory bowel disease.

5-Aminosalicylic acid presently is believed to represent the therapeutically active moiety of the sulfasalazine molecule in the treatment of inflammatory bowel disease. The metabolism of this compound, however, has not been studied in detail. In this paper we provide evidence that 5-aminosalicylic acid is acetylated to N-acetyl-aminosalicylic acid in homogenates from colonic biopsy specimens (370 +/- 20 nmol/g wet wt or 2.9 +/- 0.9 nmol/mg.min, n = 10), whereas acetylation in fecal samples was only small (13.0 +/- 3.0 nmol/g). Mucosal N-acetylation was rapid, cofactor- and pH-dependent, and could be enriched in the cytosolic fraction. In contrast, fecal acetylation was slow and did not depend on the presence of acetyl-coenzyme A. There were neither significant differences of acetylation between patients and controls nor a significant correlation to the individual acetylation phenotype. From our results we believe that presystemic acetylation of 5-aminosalicylic acid may be mainly mediated by a colonic mucosal enzyme and only to a small extent by fecal (bacterial) processes.

Acetylation↗
PubMed1989

Small intestinal transit, bacterial growth, and bowel habits in diabetes mellitus.

To investigate diabetic alterations of small intestinal transit and bacterial growth, we performed hydrogen breath tests (10 g lactulose via duodenal tube at the ligament of Treitz), bacterial cultures, and determinations of unconjugated serum bile acids in 19 patients with long-standing diabetes and 7 healthy controls. Asymptomatic diabetics had a late rise in breath hydrogen, indicating prolonged jejunal-cecal transit (86 +/- 10 min, p less than 0.05) as an early pathogenic event. Rise in breath hydrogen in symptomatic diabetics (constipation: 50 +/- 6 min; diarrhea: 41 +/- 11 min) was not significantly different from controls (57 +/- 8 min). Bacterial studies and increased unconjugated serum bile acids suggest bacterial overgrowth in some symptomatic diabetics. Bacterial overgrowth was associated more frequently (p less than 0.05) with a rise in breath hydrogen before 45 min or after 75 min. Changes in the hydrogen breath test, bacterial growth, or unconjugated serum bile acids did not correlate with gastrointestinal symptoms of diabetes.

Adult↗
PubMed1989

Olsalazine versus placebo in the treatment of mild to moderate ulcerative colitis: a randomised double blind trial.

The effect of olsalazine, an analogue of sulphasalazine, consisting of two molecules 5-aminosalicylic acid linked by an azobond has been investigated for the treatment of ulcerative colitis. In a randomised double blind trial we compared 2 g olsalazine with placebo for four weeks. Of the 105 patients, with mild to moderate ulcerative colitis, entered in the trial 52 received olsalazine, and 53 placebo. Treatment had to be terminated prematurely because of untoward effects of olsalazine (mainly diarrhoea) in three patients and treatment failure--that is, increased rectal bleeding in four patients (olsalazine group: one placebo group: three). After four weeks' treatment, a statistically significant improvement in the endoscopic findings in rectum and a positive trend in the reduction of rectal mucus and blood discharge was observed in the patients treated with olsalazine. No statistically significant difference was found for other factors, including stool frequency, consistency, urge to defecate, abdominal pain, and biopsy findings. A comparison between these clinical and endoscopic parameters at study entry and those at study completion (within drug evaluation) showed significant improvement in six of 10 parameters during treatment with olsalazine and in two of 10 during placebo treatment. This difference suggests the significant effect of olsalazine. We conclude that 2 g olsalazine was tolerated as well as placebo, apart from causing diarrhoea in some patients and was slightly superior to placebo during four weeks' treatment of mild to moderate ulcerative colitis. A study with 3 or 4 g olsalazine per day may show a more definite effect.

Adolescent↗
PubMed1989

[Risk factors for the development of fistulas in Crohn disease].

The pathophysiology of fistula formation in Crohn's disease is as yet poorly known. We, therefore, studied in 111 patients with Crohn's disease factors which may be associated with the development of fistulas. Male patients, patients with exclusively involved colon or extended disease of the colon and ileum as well as patients treated with prednisone demonstrated an increased relative risk to develop fistulas. In patients with ileitis alone and after laparatomy in combination with resection of the bowel the relative risk was less than 1. Furthermore, in 71% of the patients fistulas developed during active disease. In 65% the patients had underweight at the time of fistula formation. We conclude, that the localization of the disease, a factor which can not be influenced, as well as active disease and malnutrition, both factors which can be influenced, may be involved in the formation of fistulas in Crohn's disease.

Adolescent↗