Time dependence of [131I]albumin uptake following removal of an experimental aortic stenosis.

The uptake of trypan blue and [131I]human serum albumin (HSA) has been studied in the dog's abdominal aorta between 1 and 42 days after removal of an experimental stenosis (approximately 90%) applied 1 week previously. Previous work has shown that when the stenosis was present during circulation of these markers, their uptake was increased immediately proximal to the stenosis decreasing to normal by the renal artery level. Distal to the stenosis uptake was reduced apart from small areas of high uptake probably due to turbulent jet impacts.

Do sympathomimetic amines prevent exercise-induced asthma by bronchodilatation alone?

Seventeen patients with exercise-induced asthma were studied. Eleven patients (cases 7-17), of whom seven were atopic subjects, were given isoetharine or isoprenaline and were subsequently tested for exercise-induced asthma after bronchodilatation had ceased. In two atopic and one non-atopic patients protection was observed which could not be attributed to chance.

Partial standing wave formation above an abdominal aortic stenosis.

Reflection from an arterial discontinuity, such as a stenosis, would be expected to produce partial standing waves of pressure and flow proximal to the stenosis. This phenomenon is demonstrated by determining the amplitude changes of the harmonic components of pressure and flow waves recorded at three sites at different distances from an experimental stenosis of the abdominal aorta in dogs. To minimise the effect of reflections from other arterial sites, such as the peripheral beds, the animals were vasodilated.

Cystic fibrosis: Evidence for a genetic compound from a family study in cell culture.

Although the majority of patients with cystic fibrosis (CF) show a typical clinical course, a minority with the same clinical phenotype at the time of initial diagnosis have an atypical (mild) course. Skin fibroblast cultures were established from 49 members of the family of one such atypical CF adult patient, previously identified (Danes et al. 1976) as CF Class II (ametachromatic and no metabolic cooperation with CF Class I fibroblasts), the offspring of Class I (metachromatic, metabolic cooperation with normal fibroblasts)/Class II mating.

Influence of experimental stenosis on uptake of albumin by the abdominal aorta.

The influence of abdominal aortic stenosis on the uptake of the protein-binding trypan blue dye and 131I human serum albumin (HSA) has been studied. The major change was a region of high uptake proximal to the stenosis, returning to normal by the level of the renal arteries. There was reduced uptake distal to the stenosis, apart from occasional small areas of high uptake probably due to turbulence.

Meconium ileus equivalent in adults with cystic fibrosis of pancreas: a report of six cases.

Eleven episodes of "meconium ileus equivalent" have been seen in six adults with cystic fibrosis of the pancreas. Three patients were initially treated surgically; one died and the other two developed serious postoperative chest infections. Six episodes were successfully treated medically with acetylcysteine orally and by enema, nasogastric suction, and intravenous fluids.

Chemoprophylaxis of respiratory infections.

Chemoprophylaxis of certain respiratory infections has been described. The benefit and cost of chemoprophylaxis of tuberculosis have been compared and indications outlined. While some protection against influenzal infection by drugs of the adamantane group has been demonstrated, chemoprophylaxis against respiratory virus infections is as yet unavailable or impractical.

Cystic fibrosis in adolescents and adults.

Forty-five patients (25 male and 20 female) over 12 years of age with cystic fibrosis have been studied clinically, radiologically and physiologically. Their mean age at the first visit was 17 years; they were followed for a mean period of 4 years and attended at least every six months. The first symptom which developed before the age of five in 42 of the 45 patients was respiratory.

Cystic fibrosis: a cell culture study on an adult patient population.

Skin fibroblast cultures from an adult population of cystic fibrosis (CF) patients have been studied to determine any possible genetic or clinical significance of the two classes described for cultured CF skin fibroblasts (Danes 1973). On the basis of clinical course, the 46 adult patients from 43 unrelated families studied were divided into two groups (40 typical, 6 atypical). The cultured fibroblasts from 37 of the 40 patients with typical CF were Class I (metachromatic, cystic fibrosis factor activity (CFFA) in the culture medium, and metabolic cooperation with normal fibroblasts), and the cultures from the remaining three patients were Class II (ametachromatic, no CFFA in the culture medium and no metabolic cooperation with metachromatic CF fibroblasts).

Cystic fibrosis--immunological reactions to A. fumigatus and common allergens.

Immunological studies of forty-three patients with cystic fibrosis showed that positive prick tests to at least one common allergen were obtained in 70%, to multiple allergens in 28% and to A. fumigatus in 50%. Specific IgE antibodies against these allergens were found in the appropriate subjects.

Radiology of uncomplicated asthma.

, , 296-303. In 22 of the 117 patients with asthma, over 15 years of age, the chest radiograph showed overinflation (O pattern) and additional vascular changes in two (O pattern). Neither abnormality was seen in 60 controls.

Comparative trial of Nutrizym in chronic pancreatic insufficiency.

A cross-over trial of pancreatic replacement therapy was carried out in 12 adults with chronic pancreatic insufficiency. The standard enteric-coated preparation, Pancrex V forte, was compared with Nutrizym, which has an enteric-coated core of pancreatic extract and a shell of bromelains-a mixture of proteolytic enzymes derived from the stem of the pineapple.Nutrizym was significantly more effective than Pancrex V forte in improving fat absorption, and reduced faecal weight.

Comparison of the effect of alprenolol and propranolol on specific airway conductance in asthmatic subjects.

Alprenolol did not cause a significant fall in the mean of the specific airway conductance in nine asthmatic subjects who did show a significant fall with propranolol. Thus alprenolol is not contraindicated in asthmatic subjects, though it should be used with caution intravenously, as one subject showed a substantial fall in airway conductance at three minutes which recovered within 30 minutes. Until further studies are completed these results should not be applied to bronchitics with increased airway resistance.

Pleurectomy for spontaneous pneumothorax in cystic fibrosis.

Five cases of cystic fibrosis complicated by eight pneumothoraces are described. These cases come from a group of 49 patients who have attended the Brompton Hospital between 1964 and 1969 for management of their cystic fibrosis. Three of the patients, who had a total of six pneumothoraces, were managed by pleurectomy.