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16 results on '"Zaganelli E"'

4. [Ocular color Doppler echography: the examination technic, identification and flowmetry of the orbital vessels]

Author

Venturini M, Zaganelli E, Angeli E, Castrucci M, Pierro L, Salvioni M, Brancato R, DEL MASCHIO , ALESSANDRO, Venturini, M, Zaganelli, E, Angeli, E, Castrucci, M, Pierro, L, Salvioni, M, Brancato, R, and DEL MASCHIO, Alessandro

Subjects
Male, Reference Values, Humans, Female, Middle Aged, Ultrasonography, Doppler, Color, Eye, Rheology, Orbit, Blood Flow Velocity
Abstract

We studied the main ocular and retrobulbar vessels with color-Doppler US and report on examination technique, detectability of the vessels and their flow characteristics to define the normal ranges of Doppler spectra for each artery and vein. We comparatively examined both eyes of 20 healthy subjects. Of each eye we studied the ophthalmic artery, the central retinal artery, the ciliary artery, the central retinal vein and the superior ophthalmic vein. The following flow parameters were considered: peak systolic velocity, end-diastolic velocity and resistive index for arteries; maximum and minimum velocity for veins. The examination lasted about 10 minutes per eye--20 minutes for each subject. In all subjects the five investigated vessels were identified in both eyes, and adequate Doppler spectra were obtained. The average peak systolic velocities of ophthalmic, central retinal and ciliary arteries were respectively about 35, 12 and 10 cm/s, with low resistance patterns (resistive index: 0.75, 0.72 and 0.68, respectively). The venous flow, which is usually continuous, may be sometimes influenced by cardiac and respiratory activities: the maximum velocities of superior ophthalmic and central retinal veins were about 6 and 5 cm/s, respectively. Color-Doppler US noninvasively visualizes both ocular and retrobulbar vessels, providing major hemodynamic information from different flow parameters; the knowledge of these parameters in normal conditions can be the basis of hemodynamic studies in many abnormal orbital conditions.

Published
1996

15. Extraocular muscle size comparison between normal and myopic eyes using standardized A scan echography.

Author

Pierro L, Zaganelli E, Tavola A, and Muraglia M

Subjects
Humans, Middle Aged, Reproducibility of Results, Retrospective Studies, Ultrasonography, Myopia diagnostic imaging, Oculomotor Muscles diagnostic imaging
Abstract

The aim of this study was to establish the range of diameters of extraocular muscles in myopic patients and to obtain the baseline data to follow progression or regression of pathologies involving them. Standardized A scan and B scan ultrasound was used to measure the thickness of straight extraocular muscles at the muscle belly. No statistical differences were seen between right and left eyes. We found no consistent correlation with age or with axial length in the control or in the myopic patients (p>0.05). Diameters in myopic and control eyes were similar. This lack of difference between myopic and control muscle sizes means that we can obtain accurate measurements also from myopic patients.

Published
1998
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16. Capillary and cavernous hemangioma of the optic disc. Echographic and histological findings.

Author

Pierro L, Guarisco L, Zaganelli E, Freschi M, and Brancato R

Subjects
Adult, Capillaries diagnostic imaging, Capillaries pathology, Diagnosis, Differential, Female, Humans, Male, Middle Aged, Ultrasonography, Eye Neoplasms diagnostic imaging, Eye Neoplasms pathology, Hemangioma, Cavernous diagnostic imaging, Hemangioma, Cavernous pathology, Optic Disk diagnostic imaging, Optic Disk pathology, Retinal Diseases diagnostic imaging, Retinal Diseases pathology
Abstract

The ultrasonography features of optic disc hemangioma have been described in various reports but the extreme rarity of this ocular tumour makes any univocal interpretation of echographic findings difficult. The two cases of hemangioma of the optic disc described here, one of capillary hemangioma and the other of cavernous hemangioma, presented different echographic patterns. In the capillary hemangioma B-scan showed a mass lesion with smooth anterior border, acoustic solidity and no choroidal excavation. With A-scan there was an initial high spike with low/medium internal reflectivity. In the cavernous hemangioma, B-scan showed an elevated dome-shaped mass, with an anechoic area inside, and no choroidal excavation. With A-scan there was a high initial spike and irregular reflectivity. The eyes were enucleated for intractable neovascular glaucoma. Histological examination of the lesion explained the different echographic patterns. Ultrasonography is useful in the differential diagnosis of capillary and cavernous hemangioma.

Published
1992
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