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Biomedical subjects

V Giuliano

Publications and source records attributed to V Giuliano.

At least 19 recordsLinked to original sources
PubMed2004

Sequential extraction of heavy metals in river sediments of an abandoned pyrite mining area: pollution detection and affinity series.

In this paper heavy metal pollution at an abandoned Italian pyrite mine has been investigated by comparing total concentrations and speciation of heavy metals (Fe, Cu, Mn, Zn, Pb and As) in a red mud sample and a river sediment. Acid digestions show that all the investigated heavy metals present larger concentrations in the sediment than in the tailing. A modified Tessier's procedure has been used to discriminate heavy metal bound to organic fraction from those originally present in the mineral sulphide matrix and to detect a possible trend of metal mobilisation from red mud to river sediment. Sequential extractions on bulk and size fractionated samples denote that sediment samples present larger percent concentrations of the investigated heavy metals in the first extractive steps (I-IV) especially in lower dimension size fractionated samples suggesting that heavy metals in the sediment are significantly bound by superficial adsorption mechanisms.

Adsorption↗
PubMed2000

[Neonatal pseudohypoaldosteronism: when a denied truth can delay a diagnosis].

A child with neonatal pseudohypoaldosteronism is referred. The diagnosis was delayed and complicated as her parents didn't tell us that her sister had been affected by the same illness. The child was born after premature rupture of membranes at 34 weeks. At birth, her conditions were satisfactory. The general conditions of the child gradually worsened and, though she regularly ate human pastorized bank milk, she didn't gain any weight. After 13 days she appeared dehydrated with marbled dry skin and haloed eyes, hypotonic and hyporeflexic. Her suction became more and more weaker, with frequent regurgitations and vomiting. Laboratory tests pointed out hyponatremia (110 mEq/l) and hyperkalemia (6.8 mEq/l). We were able to establish diagnosis of primary pseudohypoaldosteronism measuring plasma concentrations of aldosterone (> 5000 pg/ml), 17 hydroxyprogesterone (normal) and corticosteroids (normal). The child was then supplemented with sodium chlorure. A gradual improvement of general conditions took place. We assumed that both childrens and mother were affected by a milder form of primary pseudohypoaldosteronism, characterized by an autosomal dominant way of transmission. We found high levels of aldosterone with normal levels of blood salts also in the sister and mother patient's. After the neonatal period, pseudohypoaldosteronism can be only suspected in case of positive family history.

Female↗
PubMed1999

Repeat tear of postoperative meniscus: potential MR imaging signs.

PURPOSE: To determine the usefulness of five magnetic resonance (MR) signs of repeat tears of the postoperative meniscus. MATERIALS AND METHODS: Fat-saturated proton-density-weighted and T2-weighted MR images in 20 patients who had undergone at least two knee surgeries were reviewed. Second-look arthroscopic confirmation of meniscal status was available in all patients. MR images of 39 menisci (10 repeat tears, 11 postoperative menisci without repeat tears, three tears in previously normal menisci, and 15 normal menisci) were evaluated for (a) a linear area of abnormal signal intensity extending to an articular surface on intermediate-weighted images, (b) abnormal meniscal morphology, (c) likelihood of a typical postoperative appearance, (d) fluid extending into the linear area on T2-weighted images, and (e) cartilage defects. Two radiologists rated their confidence on a five-point scale for the presence of these signs and were compared for level of agreement. RESULTS: The intraclass correlation coefficient (range, 0.75-0.91) indicated a high level of agreement. Areas under the receiver operating characteristic curves were large (range, 0.70-0.87) for all five signs, with a line (grade 3 signal intensity) and fluid within a line having the highest areas. These two signs also had the highest statistical scores (chi 2 = 14.12 and 13.30; P < .002; odds ratio, 1.588 and 1.599 for the line and the fluid within the line, respectively). CONCLUSION: The two best MR signs of repeat tear of the postoperative meniscus were the presence of a line and fluid within the line extending to an articular surface.

Adult↗
PubMed1998

The effects of photic driving on mood states.

The EEG photic driving response is a sensitive neurophysiological measure. It has been used to assess drug effects, forms of epilepsy, neurological status of Alzheimer's patients, and physiological arousal. Photic driving also impacts the psychological status of a person by producing increased visual imagery and decreased physiological and subjective arousal. In this study, ten volunteers underwent nocturnal polysomnography followed by six daytime testing sessions. The six sessions consisted of the alpha attenuation test, two visual analog scales for mood, the Stanford Sleepiness Scale, photic stimulation, and the multiple sleep latency test. These tests were administered 2 hours upon awakening and every 2 hours thereafter. The mean mood across the six daytime testing sessions was computed for all mood variables pre- and post-photic stimulation. Significant differences were found for the subjective moods "sleepy," "alert," and "effort." However, no significant differences were found for pre- and post-photic driving for "angry," "irritable," "hungry," "tense," "overall," "happy," "sexual," and "sad." Additionally, all participants reported increased visual imagery during photic driving, as measured by their responses to an imagery questionnaire.

Adult↗
PubMed1997

Median nerve hamartoma: MR imaging using chemical shift techniques.

Magnetic resonance imaging findings of median nerve hamartoma are presented in three patients with palpable wrist masses and median neuropathy. Fat-suppressed T1-weighted images demonstrated adipose tissue separating the neural and fibrous tissue bundles in two of three patients, which results in the distinctive appearance of these tumors on magnetic resonance imaging. Fibrous tissue appeared as enhancing longitudinal bundles within the tumor on gadolinium enhanced fat-suppressed T1-weighted images.

Adult↗
PubMed1996

Contracted gallbladder: a cause of false-positive hepatobiliary scan in patients with cystic fibrosis.

Gallbladder nonvisualization on hepatobiliary scintigraphy in cystic fibrosis is generally secondary to cystic duct obstruction from inspissated bile, mucus, or gallstones. We report gallbladder nonvisualization on hepatobiliary imaging in two patients with cystic fibrosis who had contracted gallbladders on ultrasonography. Repeat ultrasonography at 6 months revealed persistent gallbladder contraction. A contracted gallbladder therefore is a potential cause of a false-positive hepatobiliary scan which can be treated with conservative management.

Abdominal Pain↗
PubMed1981

[Nuclear medicine in pneumonology in the light of 9 year's experience at the S. Luigi Gonzaga Hospital].

An attempt is made to draw a picture of the results obtained with nuclear medicine in the pneumological field in the light of 9 years experience. An attempt is also made to identify from among recently introduced techniques (T.A.C., echotomography) which ones might be substituted for radioisotopes and when, and on what occasion they can be used as complementary treatment. It is concluded that nuclear medicine is of absolute value for functional examinations of the respiratory apparatus (perfusors and ventilators) and for lung onconscannning with Ga67 citrate and Bleomycin-Co57 under present circumstances and that in other fields certain morphological scans (bone scans) are still useful by virtue of their cost-benefit ratio.

Bleomycin↗
PubMed1981

[Indications for radiotherapy of lung cancer in the light of its clinical reality].

Reference is made to a large series and the literature in an attempt to single out cases where radiation management is indicated in the curative, palliative and anatalogic treatment of lung cancer, an in association with other therapies. It is pointed out that each case much be examined on its merits in the light of the histological type, the extent of the process, and its possible metastasis. The conclusion is drawn that radiotherapy plays a useful part in the albeit slight increase in survival of lung cancer patients under acceptable general conditions.

Humans↗