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Biomedical subjects

G Tirone

Publications and source records attributed to G Tirone.

9 recordsLinked to original sources
PubMed2003

Relaxed eddy accumulation, a new technique for measuring emission and deposition fluxes of volatile organic compounds by capillary gas chromatography and mass spectrometry.

The possibility afforded by a new relaxed eddy accumulation system in the determination of emission and deposition fluxes of volatile organic compounds (VOCs) by chromatographic techniques will be presented. The system, especially designed to limit sampling artifacts, uses adsorption traps filled with solid sorbents as reservoirs for VOC collection. Enriched compounds were analyzed by capillary GC and positive identification and quantification of eluted compounds was Achieved by mass-spectrometric detection. The method has been used to quantify the emission and deposition of both biogenic and anthropogenic VOCs over a Mediterranean forest ecosystem located in Central Italy. For the first time, both daily and seasonal trends of anthropogenic and biogenic VOCs will be reported. The consistency of monoterpene fluxes with predictions based on the knowledge of VOC emission from the dominant vegetation species will be tested. Data have been used to develop a novel algorithm to predict the seasonality of biogenic emission from the forest ecosystem.

Gas Chromatography-Mass Spectrometry↗
PubMed2002

[Multifactorial prognostic analysis in the surgical treatment of well differentiated thyroid neoplasms].

BACKGROUND: Although in recent years our knowledge of pathogenesis and natural history of thyroid cancer has widely increased, there is not accordance among authors in the field of surgical treatment of well-differentiated tumours. In fact the extension of the tumour resection and modality of cervical lymph-nodes dissection show questions not easy to answer. METHODS: From 1985 to 1994, in our Surgical Institute, 128 cases of well-differentiated thyroid cancer, out of 1346 nodular thyreopathies, were operated on. We have considered some factors as anamnestic thyreopathy, familiarity, symptoms, US and scyntigraphic factors, fine-needle aspiration cytology and surgical option. The surgical treatment consisted of 99 total thyroidectomies (with or without cervical lymph-nodes dissection) and 18 lobus-isthmectomies. Surgical morbidity was 0.7% for permanent vocal cords palsy, 9.3% for transient hypoparathyroidism and 1.4% for permanent hypoparathyroidism. RESULTS: The 5.8-year survival rate was 92.9%. Fifty-four patients were in Stage I, 35 patients in Stage II, 27 in stage III and 4 in Stage IV. Histological patterns showed the prevalence of papillary type (63.3%) over follicular type (36.7%). CONCLUSIONS: The aggressive surgical approach in well-differentiated thyroid tumours, supported by complementary postoperative therapies, leads to a good control of the disease

Adenocarcinoma, Follicular↗
PubMed1986

[Early gastric cancer (case contribution)].

Early gastric cancer (e.g.c.) was detected in 23 patients (7.8%) from a total of 293 gastric cancers observed from 1970 to 1985. Clinical and pathological aspects are discussed. In 19 cases the surgical treatment was subtotal gastrectomy for lesions of the middle and lower third, in 4 cases total gastrectomy for tumors of the upper third and of the greater curvature.

Gastrectomy↗
PubMed1983

[The hypnotic state: a psychophysiologic dimension or a useless concept?].

On the basis of his "cognitive behavioural alternative" view-point Barber has attempted to deny the hypnotic state as a psychophysical dimension necessary for the creation of recognised hypnotic behaviour. After an analysis of the definitions presented by those who believe hypnosis to be a "psychophysical state" and the contrary views of Barber, it is pointed out that both agree on its function, namely (hypnotic behaviour) = f (ideoplastic monoideism). The concept of hypnosis as "a special participatory state" (as defined in 1975), as a psychophysical state of being and acting in which focalised mental activity permits behaviour and experiences impossible in other conditions is therefore thought to be valuable.

Behavior↗
PubMed1983

[Hypnosis and cancer: a working hypothesis. Initial notes].

Hypnosis has been used to resolve stress and anxiety following profound psychological-behavioural changes occurring in the cancer sufferer from the moment of diagnosis. It is stated that hypnosis is useful in improving sick persons' quality of life through the control of stress reactions, simplification of treatment and facilitation of rehabilitation, both within the family and socially. Through deep seated psycosomatic interconnections, psychological attitude can affect organic reaction to all disease, cancer included.

Humans↗
PubMed1981

[Proposal for a project in psychotherapeutic strategy in behavior disorders].

Considerations are reviewed that do not permit any separation "from the unconscious", conceived as a reality which, together with the conscience, operates as a behavioural regulation factor through a set system that regulates behaviour by giving meaning to incoming information and giving a sense to experience. Mention is made of concepts of anxiety, removal and catharsis, and to recent research on the functions of the cerebral hemispheres. A psychotherapeutic strategy is proposed, finally, consisting of an analysis of a subject's history in a state of relaxation with guided associations, over the time span, along chains of mental content; and in the restructuring of sets through appropriate techniques.

Behavior Therapy↗
PubMedDate not supplied

[Intraoperative radiotherapy in the combined treatment of pancreatic cancers].

Pancreatic cancer is a highly lethal disease either for the high incidence of distant metastases or for the frequent local recidive also after potentially curative resection. For this reason new multimodality approaches have to be investigated. Intraoperative radiotherapy (IORT) permits to administer a high dose to the tumor or to the retropancreatic tissues and to the regional lymph nodes. Literature data suggest it is possible a better local control and perhaps a better survival than the surgery alone or the palliative treatments by the use of schedules with IORT. Anyway they are retrospective data and IORT is an investigational method which has to be indagate in the combined modality approaches to this disease.

Humans↗
PubMedDate not supplied

[Retroperitoneal liposarcoma].

Liposarcoma is the most frequent histotype of the rare and malignant retroperitoneal tumours. This neoplasm has a remarkable tendency to recurrence after surgical excision, rarely to metastasize. Recurrence usually shows a more aggressive behaviour than primitive disease with a higher tendency to penetrate into adjacent organs. The symptomatology often appears late and the first sign is frequently a palpable abdominal mass. Preoperative study involves using CT and MRI. The surgical resection is the only tool able to modify natural history with regard to survival and local recurrence. Prognosis is severe, with a survival of 5 years, variable from 12 to 50% in the different series. A very important prognostic factor is the degree of tumour and radical surgical treatment. From 1990 to 2001, 32 operations for malignant retroperitoneal tumors were performed by our surgical unit in 19 patients; in 7 of them the tumor was a liposarcoma (4 male and 3 female). Total operations for retroperitoneal liposarcoma were 15, in 4 patients a second operation was performed for recurrence, in 3 a third operation and in 1 a fourth. Eleven cases out of 15 have undergone exeresis of sarcoma. Average survival consisted in 4 years and 2 months. Intraoperative radiotherapy, performed in 3 patients, perhaps is able to offer some advantages in relation to local control of the disease and of the survival. A possible resection of eventual recurrence justifies a early follow up with CT and MRI.

Female↗