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Biomedical subjects

C Fedeli

Publications and source records attributed to C Fedeli.

7 recordsLinked to original sources
PubMed2003

Exposure assessment to alpha- and beta-pinene, delta(3)-carene and wood dust in industrial production of wood pellets.

The main aim of the study was to measure the exposure to monoterpenes (alpha- and beta-pinene and Delta(3)-carene) and wood dust during industrial production of wood pellets and briquettes. Additional aims were to compare the results from wood dust sampled on a filter with real time measurements using a direct reading instrument and to identify peak exposures to dust. Twenty-four men working at six companies involved in industrial production of wood pellets and briquettes participated in the study. Monoterpenes were measured by diffusive sampling and wood dust was measured as total dust. A data logger (DataRAM) was used for continuous monitoring of dust concentration for 18 of the participants. The sampling time was approximately 8 h. The personal exposure to monoterpenes ranged from 0.64 to 28 mg/m(3) and a statistically significant (Kruskal-Wallis test, P = 0.0002) difference in levels of monoterpenes for workers at different companies was seen. In the companies the personal exposure to wood dust varied between 0.16 and 19 mg/m(3) and for 10 participants the levels exceeded the present Swedish occupational exposure limit (OEL) of 2 mg/m(3). The levels of wood dust during the morning shift were significantly (Mann-Whitney test, P = 0.04) higher compared with the afternoon shift. Continuous registration of dust concentration showed peak values for several working operations, especially cleaning of truck engines with compressed air. For 24 workers in six companies involved in industrial production of wood pellets the personal exposure to monoterpenes was low and to wood dust high compared with the present Swedish OEL and previous studies in Swedish wood industries. Since the DataRAM can identify critical working tasks with high wood dust exposure a reduction in exposure levels could probably be achieved by changes in working routines and by the use of protective equipment.

Alkyl and Aryl Transferases↗
PubMed1999

Retrograde cerebral perfusion for aortic operations through left thoractomy.

Retrograde cerebral perfusion during deep hypothermic circulatory arrest is a technique used largely during operations on the ascending aorta, aortic arch, or both through a median sternotomy. This method is not frequently used for operations performed through a left thoracotomy because of problematic access to the right side of the heart. We propose a technique allowing retrograde cerebral perfusion through a left thoracotomy in a quick, simple, and efficient manner.

Aorta↗
PubMed1998

[Varicocele. Ligation of the internal spermatic vein using laparoscopic approach].

It is now unquestionable that varicocele represents one of the main causes of male infertility, and thus requires appropriate surgical treatment. Inguinal and retroperitoneal methods have for some time been the most widely used. However, a significant postoperative morbidity and relatively long convalescence have prompted the search for alternative surgical techniques, such as percutaneous sclero-embolisation and microsurgery. Laparoscopic treatment of varicocele is a relatively recent surgical technique. The first studies by Sanchez de Badajoz date back to 1988 and to date a relatively small number of cases have been reported. The authors analyse the results in 54 patients treated over a period of two and a half years; 13 cases also presented inguinal hernia pathology which was treated during the same operation by applying a polypropylene graft again using a laparoscopic approach; the latter method has been routinely applied since 1992 in over 1000 cases with excellent results. The internal spermatic artery was always identified and preserved. No peri- or postoperative complications were observed. A follow-up was performed at 10 months after surgery and showed results which although referred to a relatively small series, were certainly better than those reported in the literature using traditional surgical techniques; in addition, this method also reveals interesting possibilities for the treatment of associated pathologies during the same operation, with obvious advantages in terms of costs and patient compliance.

Adolescent↗
PubMed1995

New technique for retrograde cerebral perfusion during arch aneurysm repair.

Many techniques are used to reduce brain damage during surgery for dissecting aneurysms of the ascending aorta and arch. Recently, new techniques of protection were proposed, consistent with hypothermic circulatory arrest in association with retrograde cerebral perfusion via superior vena cava. We propose a simple, time-saving method, which does not require any manipulation of the heart. We use a multilumen cannula for cardioplegia (D 860-DIDECO FUNDARO') with pressure transducer. This cannula is inserted in superior vena cava by means of a simple purse-string, and linked to the arterial line with a "Y" derivation, allowing retrograde perfusion of the brain and monitoring the perfusion pressure at every moment. The superior vena cava placed downstream from the cannula is closed by a small vascular clamp, to avoid blood reflux in the right atrium. This method is time- and money-saving, is readily available, and can be prepared whenever necessary, also in the middle of the surgical procedure.

Aortic Dissection↗
PubMed1995

Aortic coarctation, aortic valvular stenosis, and coronary artery disease: combined one-stage surgical therapy operation.

The presentation of simultaneous severe coarctation of the descending aorta and severe aortic valve disease is uncommon. We describe the management of simultaneous association of aortic coarctation, aortic valve disease, and ischemic cardiomyopathy and describe a one-stage surgical approach for the correction of all pathologies. After performing the aortic valve replacement and myocardial revascularization, coarctation was solved by means of a prosthesis between the ascending aorta and the abdominal aorta. There were no evidence of myocardial ischemia during exercise testing and the blood pressure is normal.

Aorta, Abdominal↗
PubMed1985

[Ionizing radiation and video computer terminals].

VDTs are more frequently being used and, therefore have given rise to the problem of security among operators exposed to possible X-ray emissions. The authors report the results of a dosimetric investigation, carried out through TLD CaF2:Dy on X-ray exposure levels close to video display terminals of a data processing center. After testing the exposure percentage values and the measurements adjusted to one-year basis, the authors report that the value are generally similar to those existing in the environment even though significant values have been found in a few cases.

Data Display↗