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Biomedical subjects

A Prada

Publications and source records attributed to A Prada.

At least 73 records · Page 4Linked to original sources

Colloidal bismuth subcitrate as coated tablets: four times versus twice daily dosage in duodenal ulcer.

Forty patients with endoscopically proven duodenal ulceration have cooperated in a clinical trial to compare the ulcer healing effect of colloidal bismuth subcitrate (CBS) at standard dosage administered either twice or four times a day. No statistically significant difference was found to exist between ulcer healing in the two groups after 4 weeks (70% and 95%, respectively), and it is concluded that twice daily CBS is an effective treatment for duodenal ulcer with clear advantages as regards patient cooperation.

Adult↗

Hyperthermic antiblastic perfusion in the treatment of cancer of the extremities.

From February 1982 to December 1983, 42 patients affected by neoplasms of the limbs were treated at the Istituto Nazionale Tumori of Milan by hyperthermic antiblastic perfusion in extracorporeal circulation at the temperature of 40-41 degrees C for 1 h. Thirty-two were affected by melanoma, 4 by osteogenic sarcoma, 2 by squamous-cell carcinoma, 1 by liposarcoma, 1 by hemangiopericytoma, 1 by clear-cell sarcoma and 1 by Kaposis's sarcoma. As regards the immediate response, a complete plus partial remission rate of 88% without any major complication was obtained. The follow-up period is too short for any considerations about overall survival. However, because of these good clinical results we consider this method able to locally control the evolution of neoplasms of the extremities, allowing in many cases a limb salvage.

Adolescent↗

Limb-salvage procedure in two patients with spindle cell carcinoma of the lower extremities using isolation perfusion.

Two patients with extensive squamous cell carcinoma of the lower extremities, candidate for demolitive surgery, were treated by hyperthermic antiblastic perfusion in extracorporeal circulation. The temperature reached was 41 degrees C and the drug used was methotrexate at the dosage of 500 mg. Radical excision of the ulcer was possible in the 2 patients. Both tumors underwent extensive necrosis, and histology done 1 month after perfusion on surgical specimens showed limited areas of residual malignancy. These 2 patients suggest that hyperthermic antiblastic perfusion may be a limb salvage procedure in the multimodal management of extended squamous cell carcinoma of the extremities.

Aged↗

Regional perfusion at high temperature in treatment of stage IIIA-IIIAB melanoma patients.

The results obtained with isolation perfusions in stage IIIA-IIIAB melanoma patients, performed at 42.5-43 degrees C for 2.5 h, are reported. These temperatures and perfusion times were chosen on the basis of experimental data in animal models and in vitro. The clinical results were impressive, but the high percentage of complications and the high cost from a social and human point of view make this experience negative with regard to its clinical applicability, at least with such a high temperature and long perfusion time.

Adult↗

Ranitidine vs cimetidine: short-term treatment of gastric ulcer.

We compared the clinical effectiveness and endoscopic results of ranitidine and cimetidine treatment; 71 outpatients, all affected with benign gastric ulcer, were selected for the study (43 type I, 7 type II and 21 type III, according to Johnson's classification). The patients were treated randomly for 4 weeks with ranitidine (300 mg daily) or cimetidine (1 g daily). An endoscopic examination was repeated within 3 days after the end of the treatment. Clinical checks were performed weekly in order to monitor the clinical course of pain and antacid consumption, according to the patient's needs. The patients who did not demonstrate complete healing on endoscopic examination were treated for an additional 4 week period. At the end of this 4 week period, another endoscopic examination was done. Thirty-six patients treated with ranitidine and 33 with cimetidine completed the first period of therapy. The two groups were homogeneous with regard to sex, age, duration of disease, smoking habits, alcohol consumption, and type and size of ulcer. Ranitidine and cimetidine treatments did not demonstrate any significant difference with regard to ulcer healing after the 4th or the 8th week of therapy. Both ranitidine and cimetidine were less effective in healing type I than type II and III G.U., at the 4th week of treatment. No significant differences between the two groups were noted with regard to pain or weekly antacid consumption. No significant side effects were reported.

Adult↗

The effect of pirenzepine on meal-stimulated gastric acid secretion, gastrin release and gastric emptying.

Pirenzepine is a new antimuscarinic drug with a peculiar affinity for gastric parietal cells' acetylcholine receptors. Previously it has been shown that the drug effectively inhibits both basal and gastric acid secretion stimulated by several secretagogues. The aim of the present work has been to evaluate, in double-blind, placebo controlled, randomized studies on 6 male patients, the effect of pirenzepine (50 mgs orally) on gastric secretion stimulated by peptone meal, gastric emptying and gastrin release. The results show a significant decrease of gastric secretion (48 per cent in the 1st and 30 per cent in the 2nd hour) without any effect on gastric emptying and gastrin release.

Adult↗

Arteriography in childhood tumours.

Percutaneous arteriography was used as the investigation of choice in 121 children with clinically suspected malignancy on 132 occasions. Major complications occurred in 2% of the investigations and misdiagnosis in 10%. The arteriographic information was complementary to that of other, routine, investigations in 18% (25 investigations) but in 70% it was crucial, either ruling out a malignancy or defining its nature, site and size while also serving as a guide for biopsy, surgical manipulation, radiotherapy and/or chemotherapy. Arteriography can shorten the work-up in childhood tumours, especially those of the abdomen, eliminating the need for less informative radiological investigations. However, the complications encountered confirmed the peculiar difficulties and risks of paediatric arteriography and the need for strict case selection and a high degree of skill.

Adolescent↗

Inhibition of pentagastrin and insulin-stimulated gastric secretion by pirenzepine in healthy and duodenal ulcer subjects.

The effect of i.v. pirenzepine infusion both on basal and pentagastrin and insulin-stimulated secretion was studied in 19 healthy and duodenal ulcer subjects. Following an overnight fast, gastric juice was collected for 30 minutes prior to the i.v. administration of pirenzepine (16 mg plus 2 mg/h for 2 hours) and the subsequent stimulation of gastric secretion by means of i.v. pentagastrin infusion (6 microgram/kg/h) or i.v. insulin injection (0.2 U/kg). Mean acid output was reduced--in comparison to placebo--by 22% after pentagastrin stimulation and by 34% after insulin stimulation.

Adult↗