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Search Results: 1 - 10 of 7645 matches for " Stefanovi? Ivan "
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Note on the first fossil remains of a whale from Northern Bosnia
StefanoviIvan
Geolo?ki Anali Balkanskog Poluostrva , 2010, DOI: 10.2298/gabp1071127s
Abstract: Herein, the first find of a fossil whale Cethotherium aff. rathkei is reported from the Middle Miocene sediments (Badenian) of the West Paratethys (the trbci village, east of Banja Luka and Prnjavor, northern Bosnia). Although mostly represented by vertebra, the well preserved remains of the single individual consist also of humeri, tympanicum, and some isolated fragments of the skull. The find is discussed in its paleogeographical context, and the importance of the discovery in an international context is shown.
The fauna of Prebreza (southern Serbia) and its position within the mammalian neogene units
StefanoviIvan
Geolo?ki Anali Balkanskog Poluostrva , 2003, DOI: 10.2298/gabp0301077s
Abstract: The paleontological site of Prebreza in southern Serbia is an important European mammalian site of Middle Miocene age. The presence of various species shows the migration routes of various taxa in intercontinental exchange that occurred between Europe, Asia and Africa. In this paper, a short revision of published taxa is given. The correlation to other Neogene sites, such as andir, In nü, Pasalar (Turkey) and Belometchetskaya (North Caucasus) shows the position within MN6 Mammalian Neogene unit. The large collections from, and the capacity of the Prebreza site, will be the subject of further research of paleontologists and other scientists, interested in the evolution of fauna, paleogeography and the climate.
Spontaneous dislocation of a transparent lens to the anterior chamber: A case report
Jovanovi? Milo?,StefanoviIvan
Srpski Arhiv za Celokupno Lekarstvo , 2010, DOI: 10.2298/sarh1008486j
Abstract: Introduction. The causes leading to dislocation of the natural lenses are different involving injuries, hereditary diseases and spontaneous dislocation. Spontaneous dislocation of a transparent natural lens is extremely rare, especially dislocation of the anterior eye chamber. We report a case of spontaneous dislocation of the transparent natural lens to the anterior eye chamber in a patient who had no history of eye injuries. Case Outline. The patient was a 17-year old boy. Lens dislocation was spontaneous, and the patient presented for ophthalmological consultation due to a sudden vision impairment of the left eye. Biomicroscopic examination verified that the transparent lens was in the anterior chamber, and it was spherophakia of lesser diameter; there were no signs of increased intraocular pressure, as typically expected in lens dislocation to the anterior chamber. The patient was operated on in general anaesthesia. Surgery involved intracapsular extraction of the dislocated lens through a corneoscleral incision. Conclusion. This case report shows that a spontaneous dislocation of the natural lens may occur in younger people. The dislocated spherophakic lens to the anterior eye chamber did not contribute to the rise of the intraocular pressure and development of acute glaucoma. The acute glaucoma resulted from the pilocarpine narrowing of the pupil due to pupillary block. The intracapsular instrumental extraction of the dislocated transparent lens from the anterior chamber was successfully completed through a corneoscleral incision.
Selection of the variant solution of forest road alignment conceptual design using multicriteria optimisation
Stefanovi? Bogdan,Bjelanovi? Ivan
Glasnik ?umarskog Fakulteta , 2009, DOI: 10.2298/gsf0999165s
Abstract: One of the three studied variant solutions of forest road conceptual design was selected based on the linear distribution of criteria, as the method of multicriteria optimization. The selection was performed with 25 parameters classified as economic, technical, production and social criteria. The parameters of technical criteria were grouped into design, construction and building parameters. Based on calculated nominal values of parameters by the given criteria, their ranking, comparison, point rating and scoring, the selected most favorable solution was variant 1.
Mechanical injuries of the eye: Incidence, structure and possibilities for prevention
Jovanovi? Milo?,StefanoviIvan
Vojnosanitetski Pregled , 2010, DOI: 10.2298/vsp1012983j
Abstract: Background/Aim. Despite technological advances used in everyday clinical practice, injuries of the eye caused by various agents still produce blindness and poor vision in a significant number of people. The aim of this study was to analyze factors leading to occurrence of mechanical injuries of the eye. Methods. Mechanic injuries of the eye in patients treated at the Institute for Eye Diseases of the Clinical Center of Serbia in Belgrade, in an eight-year period were analyzed. Investigated parameters were: sex and age of patients, their profession, time of injury (months, days and hours), place and way of injury and a visual acuity on admission and dismiss, as well as further follow-up. Type of injury (closed or opened injuries of the eyeball), with all the complications that followed were carefully noted and monitored. The time of primary surgical repair was noted and analyzed, whenever necessary. Results. In the period of eight years, 2701 patients (2 257 males and 444 females) were treated in the hospital due to mechanical injury of the eye. Almost equally, both the right (50.5%) and the left eye (49.5%) were injured, while in 39 (1.4%) patients both eyes were injured at the same time. The injuries occurred in all age groups, but mostly in adults, employed persons, aged from 16 to 65 (70%). Among injured children, 18.8% were beyond the age of 15. Most frequent injuries occurred in workers (39%), and then in pupils (16.3%). Wood was the mean of injury in 23.7% of cases, sharp and pointed objects in 16.1%, hammering and metal particles in 14.4%, glass in 10.1%, and other different objects in the rest of 35.7% of all injured persons. There were other very serious means or mechanisms of eye injuries, like hair band, dog bite, rooster’s beak, rubber bullet, etc. Considering months in the year and days in the week, the injuries were almost equally distributed, and related to the time of day even 75% occurred between 10 a.m. and 10 p.m. Most injuries (38.2%) occurred while doing some work out of professional working place, while only 25.4% injuries occurred at the working place. Most of the patients (30.3%) had visual acuity L+P+ (light perception with correct projection) only, on attendance, but it varied from complete blindness to 1.0. There were 1 282 blunt injuries (contusion) (47.5%) and 1 373 penetrating eyeball injuries (50.8%), while the rest (1.7%) were injuries of ocular adnexa. Most of the primary surgical treatments (63.7%) were done in the first 24 hours from the moment of the injury. At dismiss, visual acuity was normal in 53.2%, the eye was b
Keratometric measurements of cornea in first three years of life in children with congenital cataract
Marjanovi? Ivan,StefanoviIvan,Vlajkovi? Gordana
Srpski Arhiv za Celokupno Lekarstvo , 2008, DOI: 10.2298/sarh0810471m
Abstract: INTRODUCTION Keratometry is a measurement curvature of the central 2-3mm of the anterior cornea and main meridians (horizontal and vertical) and secondary calculation of the full optic power of the cornea. Congenital cataract is opacity of the lens that a neonate is coming to life with. OBJECTIVE To measure a real curvature of the horizontal and vertical meridians of the cornea in the babies with and without congenital cataract (mostly with diseases of the eye adnexes) in one or both eyes, and to compare it. METHOD We examined 30 patients (60 eyes) with congenital cataract in one or both eyes (48 eyes were with and 12 eyes without congenital cataract), the study group, and 15 patients (30 eyes) with diseases of the eye adnexes, the control group. All patients were hospitalized at our clinic in the period 2002- 2004, and were 2-36 months old. RESULTS Keratometric measurements of the cornea in the study group: the eyes with congenital cataract 40-45.5 D, the eyes without congenital cataract 40-42.8 D. Keratometric measurements of the cornea in the control group were 39.9- 45 D. CONCLUSION There was no statistically significant difference between the horizontal and vertical meridian measurements of the cornea's curvature neither in the study nor in the control group.
Retrobulbar diameter of optic nerve in glaucoma
StefanoviIvan,Marjanovi? Ivan,Vlajkovi? Gordana
Srpski Arhiv za Celokupno Lekarstvo , 2009, DOI: 10.2298/sarh0904130s
Abstract: Introduction. The ultrasound diagnostics of the optic nerve includes the analysis of the optic nerve disc (PNO) and measuring of its retrobulbar diameter. With B-scan, by Schraeder's method, it is possible to measure very precisely the optic nerve, the pial diameter, the normal values for the pial diameter being 2.8-4.1 mm. In glaucoma, the disease that is most frequently associated with higher intraocular pressure, there comes the destruction of nerve fibres, which can be visualized as the excavation of the optic nerve disc. Objective. In this paper, we were interested in finding whether in glaucoma, and in what phase of the disease, the optic nerve starts growing thinner. Aware of many forms of this very complex disease, we were interested in knowing if the visualization of excavation on the optic nerve disc is related to diminishing of the pial diameter of the retrobulbar nerve part. Methods. There were treated the patients who had already had the diagnosis of glaucoma and the visualized excavation of the optic disc of various dimensions. Echographically, there was measured the thickness of the retrobulbar part of the optic nerve and the finding compared in relation to the excavation of the optic disc. Results. In all eyes with glaucoma, a normal size of the retrobulbar part of the optic nerve was measured, ranging from 3.01 to 3.91 mm with the median of 3.36 mm. Also, by testing the correlation between the thickness of the optic nerve and the excavation of the PNO, by Pearson test, we found that there was no correlation between these two parameters (r=0.109; p>0.05). Conclusion. In the patients with glaucoma, the retrobulbar part of the optic nerve is not thinner (it has normal values), even not in the cases with a totally excavated optic disc. There is no connection between the size of the PNO excavation and the thickness of the retrobulbar part of the optic nerve.
Axial length of the eye in the first three years of life in children with congenital cataract in one or both eyes
Marjanovi? Ivan,StefanoviIvan,Vlajkovi? Gordana
Srpski Arhiv za Celokupno Lekarstvo , 2008, DOI: 10.2298/sarh0802007m
Abstract: INTRODUCTION Ultrasound has an important role in the diagnostics of the posterior segment of the eye, when clinical examination is not possible. One of problems is congenital cataract. Using ultrasound biometry it is possible to measure the axial length of the eye in all ages and axial growth from the very beginning to its termination. OBJECTIVE To ratify growth of the infant’s eye with and without congenital cataract, and to determine the accuracy of ultrasound measuring with and without general anesthesia. METHOD In our study we analyzed 30 patients (48 eyes) who had congenital cataract in one or both eyes (observed group) and 20 patients (40 eyes) in whom no eye disease was diagnosed (control group). RESULTS The observed group of 30 patients (48 eyes) with congenital cataract was divided according to age into three subgroups: I) 4-12 months, 11 patients, 18 eyes; II) 13-24 months, 7 patients, 11 eyes; III) 25-36 months, 12 patients, 19 eyes. In control group we analyzed 20 patients (40 eyes) without congenital cataract. These patients were also divided, according to age, into three subgroups: I) 2-12 months, 5 patients, 10 eyes; II) 13-24 months, 6 patients, 12 eyes; III) 25-36 months, 9 patients, 18 eyes. CONCLUSION Comparing the average axial lengths of the eye in the first, second and third year of life between the observed and control groups, we did not find any statistical significance in the obtained values. When determining the accuracy of the ultrasound measuring of the axial length of the eye in the observed group, we found no statistical significance between the determined values weather the measurements were done with or without general anesthesia (p>0.05).
An unusual case of a serious blunt injury of the eye
Jovanovi? Milo?,StefanoviIvan,Mirkovi? Milo?
Srpski Arhiv za Celokupno Lekarstvo , 2009, DOI: 10.2298/sarh0912670j
Abstract: Introduction. Optic nerve avulsion is a serious injury of the eye. The objective of the paper was to present the peculiarity of the eye injury caused by a penetrating orbital wound with foreign body being retained in the orbit. Case report. A 15-year-old boy who sustained injury by chain link is presented. While he was turning the chain round in his hand, the last link broke off, piercing the lower lid, penetrated the left orbital cavity and remained behind the eyeball at the top of orbit. While passing towards the top of the orbit, the foreign body caused a blunt injury of the eyeball and avulsion of the ocular nerve. The accurate localization of the foreign body was verified by X-ray and CT imaging. The foreign body was removed through the entry wound. The eye injury resulted in amaurosis. Conclusion. This injury was one of those that could have been prevented.
The relation between the thickness of retrobulbar part of the optic nerve, measured by ultrasound, and the degree of prominence of the optic disc in stasis of the optic nerve
StefanoviIvan,Stanojevi?-Paovi? Anka,Antunovi? Vaso
Srpski Arhiv za Celokupno Lekarstvo , 2006, DOI: 10.2298/sarh0612479s
Abstract: Introduction: The etiology of the noninflamed edema of the optic disc, or the stasis of the same, is related to a large number of various illnesses which result in the increased intracranial pressure. When examining fundus, an edema of the optic disc is found which can be quantitatively expressed in diopters, while retrobulbar part of the optic nerve can be measured by ultrasonography. Objective: The Objective of our investigation is to explore the relation of the optic disc prominence and the degree of thickness of retrobulbar part of the optic nerve. Method: Study included 21 patients with the increased intracranial pressure, treated at the Institute of Neurosurgery, Clinical Center of Serbia, that is, 41 eyes that manifested stasis of the optic nerve. Echographically, by means of Schraeder’s Method, the thickness of retrobulbar part of the optic nerve was measured and the degree of the optic disc prominence was clinically determined in diopters. Results: The thickened optic nerve was confirmed in all patients. Using Pearson’s correlation, the relation between the degree of the optic nerve thickness and the prominence of the same was analyzed, and it was found that there was no significant correlation between these two parameters. Conclusion: Instead of Conclusion, we shall ask a question: How relevant is dogma that the prominence of the optic disc more than 3D should be considered the optic disc stasis? The authors think that rating of the optic disc prominence in diopters is not justified.
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