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Biomedical subjects

D Leotta

Publications and source records attributed to D Leotta.

7 recordsLinked to original sources
PubMed2001

Quantification of gastric emptying and duodenogastric reflux stroke volumes using three-dimensional guided digital color Doppler imaging.

OBJECTIVE: To develop a non-invasive method for evaluating gastric emptying and duodenogastric reflux stroke volumes using three-dimensional (3D) guided digital color Doppler imaging. METHODS: The technique involved color Doppler digital images of transpyloric flow in which the 3D position and orientation of the images were known by using a magnetic location system. RESULTS: In vitro, the system was found to slightly underestimate the reference flow (by average 8.8%). In vivo (five volunteers), stroke volume of gastric emptying episodes lasted on average only 0.69 s with a volume on average of 4.3 ml (range 1.1-7.4 ml), and duodenogastric reflux episodes on average 1.4 s with a volume of 8.3 ml (range 1.3-14.1 ml). CONCLUSION: With the appropriate instrument settings, orientation determined color Doppler can be used for stroke volume quantification of gastric emptying and duodenogastric reflux episodes.

Adult↗
PubMed1987

A case of cortical blindness due to carbon monoxide poisoning.

We report a case of cortical blindness occurring 7 days after acute CO poisoning with no other neurological or psychic deficits apart from denial of the blindness with visual confabulation and slight loss of retentive memory. There was scant correlation between the course of the clinical pattern, which cleared completely within 6 days, and the electroencephalographic pattern with marked and diffuse slowing, which did not recede completely during 3 months observation. CT scanning of the skull, initially within normal limits, displayed 2 weeks later a faint but diffuse hypodensity of the white substance, more marked in the occipital region, which was no longer present 80 days after the first scan.

Acute Disease↗
PubMed1984

[Sexuality in elderly men].

The era when the sexuality of the elderly male was a taboo subject to be avoided is long past. In fact a growing number of doctors, sociologists and psychoanalysts are investigating the sexuality of the elderly, partly in an attempt to counteract the mistaken view that all sexuality is pathological at that age. All authorities in fact agree that the elderly male may have a sex life, even though genital activity may diminish. Data are presented on the sexuality of a group of elderly men in good health and with an active interest in life. The survey indicates that sociological old age may not necessarily be synonymous in man with sexual old age.

Aged↗
PubMed1984

Depression in Parkinson disease: a disabling but neglected factor.

20 depressed and 20 non depressed patients with Parkinson disease were rated for disability on the Northwestern University Disability Scale and for severity of the "typical" motor symptoms on the Columbia University Rating Scale and were assessed for mental deterioration. The severity of the "typical" symptoms was practically equivalent in the two groups but the depressed patients not only presented mild mental deterioration but were significantly more disabled (less independent) than the patients without depression. A significant correlation was found between severity of depression and degree of disability but not between severity of depression and severity of "typical" motor symptoms. Depression was diagnosed much later than the "typical" symptoms. Only 25% of the depressed parkinsonians had received tricyclic antidepressants, about 20% had been treated with dopamine-antagonist psychotropic drugs and some 50% had received no treatment at all against depression. Timely diagnosis and appropriate treatment of depression in parkinsonian patients limits the effects of a major disabling factor.

Aged↗
PubMed1983

[Tomodensitometric studies in multiple sclerosis].

Thirty-five patients with multiple sclerosis were examined with Computed Tomography of the brain. CT was normal in six cases (17%), plaques of low attenuations were shown in ten patients (29%), cerebral atrophy was present in twenty-five cases (71%). Four areas of contrast enhancement appeared in two patients (5%) after intravenous administration of ioide.

Adolescent↗
PubMedDate not supplied

How positionally stable is a transesophageal echocardiographic probe? Implications for three-dimensional reconstruction.

Three-dimensional (3D) reconstruction from a single esophageal scanning position requires a stable relationship between the probe and the heart. The purpose of this study was to examine the movement of a transesophageal echocardiographic probe during 3D image acquisition. A new dual-axis multiplane probe was used that includes a miniature (6 x 6 x 9 mm) magnetic sensor in the tip. The sensor identifies the probe's 3D position and 3D orientation in space with respect to the location of a magnetic field generator placed beneath the subject. In vivo 3D scanning was performed in five anesthetized, ventilated dogs, with positional determinations acquired every 66 msec. Probe movement was estimated by computing the deviations of each x, y, and z position and orientation determination, compared with the average values during each 3D scan or cardiac cycle. Ten 3D scans were analyzed, involving 263 cardiac cycles and 2328 determinations. The range and SD of the translational movement of the transducer were 2.3 and 0.8 mm, 1.7 and 0.5 mm, and 2.4 and 0.7 mm in x, y, and z directions, respectively, during 3D scanning. Translational movement was more dominant than was rotational movement. Misregistration of three-dimensional reconstructions may be due to subtle probe movement. The ability to monitor probe movement may be helpful in optimizing 3D data sets.

Animals↗