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Biomedical subjects

I Cobden

Publications and source records attributed to I Cobden.

At least 19 recordsLinked to original sources
PubMed2000

Compliance of orthopaedic patients with postoperative oral nutritional supplementation.

BACKGROUND: Studies have shown clinical benefits of nutritional supplementation in orthopaedic and elderly patients in both under and well nourished groups. However, patient compliance with the supplementation has not been reported. AIM: To assess level of patient compliance with nutritional supplementation when prescribed postoperatively to unselected orthopaedic patients as part of a large controlled trial researching the clinical benefits of non-targeted nutritional supplementation. METHODS: Patients in the intervention group were prescribed two oral supplements each day of their hospital stay, in addition to usual meals. Information describing the supplements was given by the dietitian. Supplements were issued on drug rounds and the proportion of each drink consumed was recorded and collated. Patients could choose to change the type of drink or to discontinue the supplements completely at any time. Twenty-four hour food intake was analysed for a random sub-sample of 48 patients. RESULTS: Eighty-four patients (27 men, 57 women; mean age, 72 years) were prescribed supplements. Median length of stay was 14.4 days. Supplements were taken for a mean of 6.7 days. Median compliance was 14.9%. Despite this, median energy intake in the study group was 1523 kcal/day and 1289 kcal/day in the control (P= 0. 0214). CONCLUSION: Compliance with non-targeted, postoperative nutritional supplementation is poor in unselected orthopaedic patients but even low levels of supplementation significantly increase energy intake.

Adult↗
PubMed1999

The CLO test in the UK: inappropriate reading and missed results.

BACKGROUND: In endoscopy units, the CLO test is frequently used to detect Helicobacter pylori (H. pylori). Informal survey suggested that practice deviated from that recommended, with little account taken of possible confounders such as acid-suppressing medication. OBJECTIVES: To determine the influence of reading time and acid suppression on CLO tests and to estimate impact on test results in UK endoscopy units. DESIGN: Survey of use of CLO tests. Prospective study of time to positivity and concurrent medication in CLO tests from 782 patients. SETTING: Forty-eight endoscopy units throughout the UK, and a district hospital endoscopy unit. PARTICIPANTS: Eighteen endoscopy units in the old Northern Region, and a random sample of 30 other UK units. MAIN OUTCOME MEASURES: Time of reading of CLO tests in UK units, and time to positivity of CLO tests in one hospital. RESULTS: Endoscopy units most frequently used CLO tests to assess H. pylori colonization, with marked differences in the times when tests were read. Nineteen out of 37 units discarded tests considerably earlier than the recommended 24 h. Over 20% of CLO tests became positive more than 2 h after collection, with 11% taking 24 h to change colour. Acid-suppressing medication prolonged time to positivity. CONCLUSIONS: The majority of endoscopy units read tests earlier than recommended. Acid-suppressing medication delays the development of CLO tests and may increase numbers of false-negative tests. Endoscopy units should read tests at 24 h and preferably test patients off ulcer healing medication.

Evaluation Studies as Topic↗
PubMed1998

Painless small bowel ischemia presenting with diarrhea and weight loss.

Chronic ischemia of the small bowel is classically described as presenting with abdominal pain associated with eating (intestinal angina). Here we describe the cases of two patients with chronic small bowel ischemia who presented atypically with painless watery diarrhea and weight loss. These cases suggest that the clinical spectrum of chronic small bowel ischemia may be wider than previously appreciated. Chronic ischemia of the small bowel should be included in the differential diagnosis for painless watery diarrhea in the context of weight loss.

Aged↗
PubMed1991

Is topical therapy necessary in acute distal colitis? Double-blind comparison of high-dose oral mesalazine versus steroid enemas in the treatment of active distal ulcerative colitis.

Thirty-seven patients suffering an attack of acute distal ulcerative colitis of mild or moderate severity were randomized in a double-blind, double-dummy fashion to receive either 800 mg oral mesalazine four times daily (18 patients) or steroid enemas twice daily (19 patients) for 4 weeks. Both treatments were well tolerated with no adverse effects. Three patients in each group were withdrawn because of clinical deterioration but both treatments produced significant clinical improvement with decreases in stool frequency and scores for urgency, bleeding and tenesmus. There were no significant differences between the treatments although there was a slight trend in favour of the enemas for reduction in rectal bleeding. Activity of the colitis as graded at sigmoidoscopy also decreased significantly with both treatments and there were corresponding improvements in histological parameters of inflammatory activity assessed with the aid of a computerized morphometric system. Little correlation was seen between clinical, sigmoidoscopic and histological changes.

Acute Disease↗
PubMed1991

Morphometric studies in rectal biopsy specimens from patients with ulcerative colitis: effect of oral 5 amino salicylic acid and rectal prednisolone treatment.

Morphometric measurements were performed on rectal biopsy specimens from 10 normal control subjects and 33 patients with a relapse of distal ulcerative colitis before and after treatment for four weeks in a double blind controlled trial with oral eudragit S coated 5 amino salicylic acid (n = 12) or rectal prednisolone enemas (n = 15). Measurements were assessed using a computer aided measuring system and a counting technique. When untreated patients were compared with the control group there were significant decreases in the area and height of the surface epithelium, in the area of crypt epithelium, and in the ratios of goblet cells to epithelial cells and of surface epithelium to lamina propria. The vascular and lamina propria areas and the number of intraepithelial polymorphs were increased. Treatment with 5 amino salicylic acid and corticosteroids resulted in similar morphological improvements: there was an increase in the area and height of the surface epithelium and the ratios of surface epithelium to lamina propria and of surface to crypt cell height. The ratio of goblet cells to epithelial cells also increased after treatment, while the numbers of polymorphs in the surface and crypt epithelium and lumen decreased. In conclusion, computerised morphometry is valuable for the assessment of the treatment of patients with ulcerative colitis and that in the doses used both treatments were of similar efficacy.

Aminosalicylic Acids↗
PubMed1989

Exotic diarrhoeal problems and poliomyelitis.

Exotic gastrointestinal infections continue to increase as world travel expands. Many are debilitating and some are life-threatening. A heightened awareness of their significance and symptomatology could help to prevent unnecessary suffering or death.

Diarrhea↗
PubMed1989

Placebo-controlled trial of terlipressin (glypressin) in the management of acute variceal bleeding.

In a double-blind trial 60% of acute variceal bleeding episodes were controlled with terlipressin (glypressin) compared with 37% in patients given placebo (NS). Rebleeding was more common in the placebo group so that at 5 days bleeding remained under control in 54% of patients treated with terlipressin compared with only 19% after placebo therapy (p less than 0.025). Blood transfusion requirements were similar in the two groups. Terlipressin appeared to be the most effective in those patients with severe hepatic dysfunction.

Acute Disease↗
PubMed1989

Hepatic abnormalities in coeliac disease: three cases of delayed diagnosis.

Three cases of biopsy-proven coeliac disease are presented. In each case the predominant clinical and laboratory features suggested liver disease, bowel symptoms were a minor part of the presentation and the diagnosis of coeliac disease was not reached for approximately 6 months. Liver biopsy in one case showed marked fatty change, in the other cases only mild hepatitic changes. A gluten-free diet produced resolution of symptoms and, in the patient with steatosis, normalization of liver function tests. Hepatic abnormalities have been reported in coeliac disease and the significance of these is discussed but such abnormalities are usually minor and do not obscure the underlying diagnosis. We feel that these cases serve as a salutary reminder of the protean manifestations of coeliac disease.

Adult↗
PubMed1988

Should colonoscopy be the first investigation for colonic disease?

Many patients with suspected colonic disease undergo rigid sigmoidoscopy, barium enema examination, and ultimately total colonoscopy, but the need for preliminary radiology has not been formally assessed. A total of 168 patients requiring large bowel investigation were therefore randomised to undergo either rigid sigmoidoscopy plus double contrast barium enema examination or total colonoscopy. Disease was found in 56 patients, including 14 with a carcinoma, 11 with polyps, and 16 with inflammatory bowel disease, the remainder having diverticular disease alone. Of the 89 patients allocated to double contrast barium enema examination, nine required a subsequent colonoscopy for suspected tumour or polyps, three because of incomplete radiological examination, and 12 for rectal bleeding for which no cause was found at the radiological examination. In 16 patients this yielded further information or altered treatment. Of the 79 patients undergoing total colonoscopy, only six required subsequent radiology. As both procedures were well tolerated with no major complications total colonoscopy may be the preferred initial investigation where facilities allow.

Adult↗
PubMed1988

Hepatic epithelioid haemangioendothelioma: difficult name, difficult diagnosis?

Two patients with epithelioid haemangioendotheliomata of the liver are described. Both presented with abdominal pain and malaise, with hepatomegaly and a variable degree of hepatocellular dysfunction. Diagnosis was delayed in both cases, each patient undergoing a protracted series of investigations including repeated liver biopsies. The major obstacles to early diagnosis were a lack of clinical awareness of the condition and difficulties in interpretation of the liver histology: the widespread sclerosis in the tumour tissue is easily mistaken for a post-necrotic or cirrhotic process. The key to the diagnosis is the demonstration of cells containing Factor-VIII-related antigen confirming the endothelial origin of the tumour. One patient died within three months of presentation and the other after 18 months. The tumour may, therefore, be more aggressive than earlier reports seem to suggest. It seems likely that the tumour is being under-diagnosed and although no specific therapy has been shown to be of value, a greater awareness of the condition, resulting in a more prompt diagnosis, should save patients from undergoing unnecessary investigation.

Female↗
PubMed1987

A randomised, prospective study comparing two contrast media in ERCP.

A randomised, prospective, stratified, double blind study comparing two contrast media in endoscopic retrograde cholangio-pancreatography (ERCP) was undertaken. Forty-six patients received Meglumine/Sodium Ioxaglate (Hexabrix 320) and forty-eight received Meglumine/Sodium Diatrizoate (Urografin 310). The two groups were evenly matched for age, sex and diagnosis. Radiographs were examined independently by two radiologists. There were no differences in radiograph quality with either type of contrast medium. More patients developed pancreatitis following Urografin, suggesting that Hexabrix is a safer contrast medium for ERCP.

Adult↗
PubMed1987

Passive and active carbohydrate absorption by the ageing gut.

We investigated the effects of advanced age, hospitalization and poor nutrition on passive and active carbohydrate absorption using the probe molecules lactulose and mannitol (passive absorption), and 3-O-methylglucose (active absorption). We studied five groups of subjects; healthy controls aged 20-30 years, 40-50 years and over 65 years, respectively, together with long-stay patients and elderly in-patients being investigated for malnutrition. Each subject undertook two separate studies ingesting a drink containing 5 g lactulose, 2 g mannitol and 2.5 mg 3-O-methylglucose (3-O-MG), on one occasion in isotonic solution and in the second study in hypertonic solution, following overnight fast. Urinary recovery of all three probe molecules declined significantly with age (P less than 0.02) and was reduced in malnourished elderly subjects compared to healthy elderly controls (P less than 0.05). Correction of urinary recoveries for renal function on the basis of creatinine clearance abolished significant differences between groups. Thus passive absorption of carbohydrate is not impaired with advanced age in healthy elderly subjects or long-stay hospital patients. The ratio of the percentage recovery of 3-O-MG to the percentage recovery of mannitol was significantly reduced in the healthy elderly subjects compared to middle-aged and young controls in the hypertonic study; similar changes did not occur in the long-stay and malnourished elderly patients, interpretation of this finding is thus difficult. If confirmed, this impairment would suggest a possible defect in active sugar transport in the elderly.

3-O-Methylglucose↗
PubMed1987

Effect of ethanol challenge on serum glycoproteins in alcoholic and non-alcoholic liver disease.

The effects of acute ethanol challenge on serum glycoprotein concentrations in man were studied. Serum levels of haptoglobin, alpha-2-macroglobulin and pre-albumin were measured fasting and 6 hr after oral ethanol 0.75 g/kg body weight in 8 healthy controls, 13 patients with alcoholic liver disease and 13 with non-alcoholic-related liver damage, both patient groups being further subdivided into those with and without cirrhosis. Basal levels of haptoglobin were significantly higher in non-cirrhotic alcoholics than controls and pre-albumin levels were lower in non-alcohol-related cirrhotic liver disease. In response to ethanol challenge, no consistent change was observed in any group, nor was there any significant difference between groups. There was, however, a significant correlation (r = 0.53, P less than 0.005) between the percentage changes in haptoglobin and alpha-2-macroglobulin. In 16 subjects (2 controls, 8 alcoholics and 6 non-alcoholics) blood levels of ethanol and acetaldehyde were measured serially: there was no relationship between the peak or mean concentration and the glycoprotein response. This study does not substantiate other reports which claimed to be able to predict the severity and reversibility of alcoholic liver disease on the basis of the serum glycoprotein response to ethanol: ethanol challenge with measurement of serum glycoproteins cannot substitute for proper histological assessment.

Acetaldehyde↗