Search PubMed⌕ Search

Biomedical subjects

R Bettini

Publications and source records attributed to R Bettini.

At least 109 records · Page 6Linked to original sources
PubMedDate not supplied

Controlled release dosage forms: from ground to space.

Controlled release of drugs is one of the most significant advances in pharmacy. Due to the proposition of new routes for drug administration, today it is considered as a part of 'drug delivery'. Developments in biotechnology producing natural molecules, peptides and proteins have allowed high activity substances that require careful formulation for administration. Drug delivery is the discipline striving to sole the problem of optimisation of drug efficacy. In this contribution the last 25 years of drug delivery research have been examined pointing out the most significant break-through steps.

Delayed-Action Preparations↗
PubMedDate not supplied

[Effects of amiodarone on atrio-ventricular and ventriculo-atrial conduction in the Wolff-Parkinson-White syndrome (author's transl)].

In 10 patients with the Kent's bundle W.P.W. syndrome, the action of amiodarone (5 mg/kg i.v.) on conduction along the normal and anomalous pathways was studied. The drug actions were: 1) constant increase of the anomalous pathway E.R.P., in one case with antegrade functional block; 2) constant reduction of antegrade conduction velocity along the anomalous pathway, in one case with antegrade functional block; 3) reduction of retrograde conduction velocity along the anomalous pathway in 6 cases out of 8, including one with retrograde functional block; 4) constant increase of the A-V node E.R.P.; 5) reduction of sub Hisian A-V conduction velocity in 3 cases out of 7. Episodes of reciprocating tachycardia could be initiated by atrial electrostimulation in 5 patients before administration and in 3 following administration of the drug. In connection with the electrophysiological properties of the two atrio-ventricular pathways and on the mechanism of tachycardia, the use of this drug in prevention of the circus movement tachycardia in patients with the W.P.W. syndrome is discussed.

Adolescent↗
PubMedDate not supplied

Cystic tumours of the pancreas: a review.

The detection of a cystic tumour of the pancreas is a challenge which puts not only the surgeon's knowledge and expertise to the test, but also those of the team of radiologists and pathologists with whom he works. The diagnosis of a suspected pancreatic cystic tumour is morphological and is based on modern imaging techniques and, in the case of intraductal papillary mucinous tumours, on endoscopic findings. In the search for the correct preoperative diagnosis, however, it is of fundamental importance to bear in mind the limitations of the various instrumental investigations, and particularly those of fine-needle aspiration cytology. In this light the main morphological and clinicopathological features of serous cystadenomas, mucinous adenomas and adenocarcinomas, intraductal papillary mucinous tumours and papillary cystic and solid tumours are analysed as well as the surgical indications. In fact only the surgeon, on the basis of his knowledge of the patient's medical history and symptoms, will be in a position to determine to which nosological "cystic" entity the morphological findings described belong. A deeper knowledge of the natural history of each of these cystic tumours will help the surgeon formulate the most appropriate treatment indication. Providing the patient's condition fulfills the necessary operability criteria, resection will be mandatory whenever there exists a doubt that the tumour may be malignant or whenever its natural history suggests a malignant potential.

Cysts↗
PubMedDate not supplied

[Reaction times during citicoline treatment].

The effects of Citicoline were investigated in 40 patients with pathological cerebral involution of atrophic origin. The dose was 1000 mg/die by parenteral injection for 4 weeks; 20 patients, after a wash-out of a week, received another cycle of Citicoline at the same doses for other 4 weeks. Citicoline treatment has shortened significantly the reaction times and has improved cognitive and behaviour capacities, evaluated according to the "Clifton test" and "Green Relatives Stress Scale". Better results were obtained in patients who received two cycles of therapy. No side effects were observed during the study.

Aged↗
PubMedDate not supplied

[Effectiveness and tolerability of selegiline in the treatment of pathological cerebral involutions].

A dysfunction of dopaminergic systems with reduction of active dopamine, is well-known in cerebral involution. Twenty patients with mild-moderate pathological cerebral involution of atrophic and/or vascular origin, were treated with Selegiline (L-deprenyl), a monoamino-oxidase B inhibitor (10 mg/die for six months). Compared with a control group, Selegiline treated patients showed a statistically significant improvement in cognitive and behaviour capacities. At the end of investigation, "Mini Mental State" showed an improvement of 26.5% in Selegiline group and of 3.7% in control group (P < 0.01). "Echelle Clinique d'Aptitudes Intellectuelles" showed an improvement of 29.4% and of 10.8% respectively (P < 0.01). Selegiline treatment has shortened significantly the reaction times and has improved mnesic capacities. No side effects were observed during the study.

Aged↗
PubMedDate not supplied

[Effectiveness of mesoglycan in the prevention of cerebral ischemia].

40 subjects who had a transitory ischemic cerebral attack were treated with Mesoglycan and controlled for two consecutive years. Only four patients showed relapse of ischemic cerebral attacks. There was also noted a positive effect on the patients' quality of life, examined using psycometric scales.

Administration, Oral↗
PubMedDate not supplied

[Essential thrombocythemia].

New diagnostic and therapeutic aspects of the essential thrombocythemia are summarized. A series of 14 patients with essential thrombocythemia is reported.

Adult↗