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Halit Oguz

Publications and source records attributed to Halit Oguz.

At least 19 recordsLinked to original sources
PubMed2006

Long-term effects of tibolone on ocular functions in postmenopausal women.

Hormone replacement therapy has been widely used for the prevention of postmenopausal osteoporosis and treatment of climacteric symptoms for many years, but its effect on ocular functions remains unclear. The aim of the study was to evaluate the long-term effects of tibolone on ocular functions in postmenopausal women. A total of 77 healthy women with at least 1 year of spontaneous menopause were enrolled in the study. Forty women were treated with tibolone for 6 months and 37 women were left untreated. All these patients underwent ophthalmic examination including visual acuity, intraocular pressure (IOP), tear functions, blue-on-yellow and white-on-white Humphrey visual field (HVF), visual evoked potentials (VEP) and electroretinography (ERG). There were significant differences in mean deviation of blue-on-yellow HVF, and oscillatory potentials (O1, O2, and O4) in the ERGs of the chronic tibolone users and the control (P < 0.0001, P = 0.001, P < 0.0001 and 0.05, respectively). However, no significant differences were observed in visual acuity, IOP, tear functions, white-on-white HVF and VEP. We concluded that, although tibolone had no effects on visual acuity, IOP, tear functions and VEP, it might cause some early adverse effects on the electrophysiologic and structural characteristics of the retina, which are detected by these sensitive assays. Randomized placebo-controlled studies with larger groups are needed in future research.

Electroretinography↗
PubMed2006

Ophthalmic chapters of Serefeddin Sabuncuoglu's illustrated surgical book (Cerrahiyyetü'l Haniyye) in the 15th century.

Serefeddin Sabuncuoglu wrote Cerrahiyyetü'l Haniyye (Imperial Surgery) in 1465. It was the first illustrated surgical textbook in the Turkish-Islamic medical literature. Only three handwritten copies exist. Cerrahiyyetü'l Haniyye consists of three chapters (412 pp.) covering a wide range of surgical specialties, including medical and surgical management of such ophthalmic diseases as chalazion, symblepharon, lymphangiectasia, pannus, proptosis, and hypopyon.

Books, Illustrated↗
PubMed2005

Colored illustrations of pediatric otorhinolaryngologic surgical techniques of a Turkish surgeon, Serefeddin Sabuncuoglu, in the 15th century.

OBJECTIVES: Serefeddin Sabuncuoglu is known to be the author of the first illustrated surgery book, Cerrahiyyetu'l Haniyye (Imperial Surgery), which was written in Turkish in 1465 a.d. at the age of 80. The purpose of this paper is to describe his contributions to pediatric otorhinolaryngology. RESULTS: Cerrahiyyetu'l Haniyye consists of three chapters totaling 412 pages, in which there are 191 sections dealing with a wide range of surgical specialties, including pediatric otorhinolaryngologic surgery. Sabuncuoglu explains some of child diseases and their treatment in a whole section, and gives information on the same subject in relevant part of sections. The illustrations he provides are not at a state of the art level with those of his contemporaries, but they bear a great importance considering the attitudes of Islam to the art of painting. For each section, a single, poetic sentence describes in detail the diagnosis, classification and surgical technique. Some authors have claimed that he only translated Ebu Kasim-al Zahravi (Albucasis)'s Al-Tasrif (Textbook of Surgery) and added the illustrations of the surgical techniques. Even if this is accepted, the illustrations are enough to entitle this work as a milestone. Serefeddin Sabuncuoglu describes medical and surgical management pediatric otorhinolaryngologic diseases such as harelip, hypertrophy of adenoids, atresia of external auditory canal, a foreign body in external auditory canal, short frenulum, abscess of head, mass and abscess of neck in children and unpleasant odor in nose in his textbook. CONCLUSIONS: Although not recognized and rewarded in his time, Serefeddin Sabuncuoglu was a great surgeon in Turkish medical history. The sections on children in his book are of great importance in pediatric otorhinolaryngology which became a different speciality in the last century. Writing his book at his 80's, he deserves to be considered as a distinguished scientist, medical doctor and illustrator of his era, considering the insulting and discriminating ideas toward women and children, especially girls, at that period.

Books, Illustrated↗
PubMed2005

Effectiveness of topical taurolidine versus ciprofloxacin, ofloxacin, and fortified cefazolin in a rabbit Staphylococcus aureus keratitis model.

PURPOSE: Taurolidine is a broad-spectrum, non antibiotic antimicrobial agent, not previously tested against the common causes of bacterial keratitis. This study, employing an experimental rabbit model of Staphylococcus aureus keratitis, investigated the effectiveness of topical taurolidine in reducing the number of bacteria, and its effectiveness was compared with topical ciprofloxacin, ofloxacin, and 5% cefazolin. METHODS: The right corneas of all rabbits were intrastromally injected with 100 colony-forming units of Staphylococcus aureus ATCC strain 25923. The animals were divided into the following seven groups: Group 1 (6 rabbits) received taurolidine, group 2 (6 rabbits) received ciprofloxacin, group 3 (6 rabbits) received ofloxacin, group 4 (6 rabbits)received cefazolin, group 5 (5 rabbits) received polyvinylpyrrolidone (vehicle),group 6 (4 rabbits) received sterile water, and group 7 (4 rabbits) was left un-treated (control group). The eyes were topically treated every 30 min with the above-mentioned substances from 4 to 9 h postinjection. One hour after the last drop administration (at 10 h postinjection), signs of inflammation were scored in a masked fashion by slit-lamp examination. Then, their corneas were processed. The number of colony-forming units (cfu) per cornea in all eyes was also determined. RESULTS: All antimicrobial (taurolidine, ciprofloxacin, ofloxacin, and cefazolin) treatments significantly reduced cfu numbers and slit-lamp examination scores compared with untreated eyes, eyes that received the vehicle, or eyes with sterile water (all p values <0.05). Regarding cfu numbers, although taurolidine therapy was significantly less effective than ciprofloxacin or ofloxacin,there was no significant difference between taurolidine and cefazolin groups.However, taurolidine had similar clinical examination scores with the other antimicrobials, while it had lower scores than the vehicle, sterile water, or un-treated eyes. CONCLUSIONS: The results obtained in this study suggest that topicaltaurolidine is an effective, novel ocular chemotherapeutic agent for the therapy of rabbit experimental Staphylococcus aureus keratitis. This drug may be a useful and promising ocular antimicrobial.

Administration, Topical↗
PubMed2004

Treatment of xanthelasma palpebrarum with argon laser photocoagulation. Argon laser and xanthelasma palpebrarum.

PURPOSE: We report the results of argon laser coagulation of xanthelasma lesions. METHODS: Forty eyelids of 24 patients with xanthelasma were treated in 1 to 4 sessions at 2-3 week intervals, using an argon green laser. The laser parameters were as follows: wavelength 514 nm; spot size 500 microns; energy 900 mW; the duration of the laser pulse 0.1-0.2 seconds. The procedure was done on outpatient basis. A gauze pad soaked in topical anaesthetic eye drops was applied to the surface of the lesion. RESULTS: The therapy was well tolerated, and all lesions responded to the therapy. There were no complications and no functionally relevant scar developed. The cosmetic outcome was considered to be good in 85% of the cases. CONCLUSION: Argon laser photocoagulation represents an alternative treatment in selected cases. It is easy to perform and well tolerated by the patients.

Adult↗
PubMed2004

Intravitreal taurolidine against experimental Staphylococcus epidermidis endophthalmitis in rabbits.

PURPOSE: Taurolidine is a broad spectrum, non-antibiotic antimicrobial agent, not previously tested against infectious endophthalmitis. The efficacy of intravitreal taurolidine in the treatment of experimental Staphylococcus epidermidis endophthalmitis was evaluated and compared with vancomycin in a rabbit model. METHODS: The right eyes of 34 albino rabbits were infected with an intravitreal inoculum of S. epidermidis (10(5) colony-forming units/0.1 ml). The right eyes of four rabbits (group 7) were not infected and served as uninfected controls. 24 hours after inoculation of bacteria the animals were divided into the following treatment groups: group 1 (7 rabbits) received intravitreal taurolidine at 24 hours and group 2 (7 rabbits) received at 48 hours. Group 3 (7 rabbits) received vancomycin at 24 hours and group 4 (7 rabbits) at 48 hours. Group 5 (3 rabbits) received polyvinylpyrrolidone at 24 hours and group 6 (3 rabbits) at 48 hours. Clinical scoring was performed at 24, 48 and 72 hours. At 72 hours post inoculation, vitreous samples were collected for quantitative microbiological studies and then, the eyes were enucleated for histopathological scorings. RESULTS: The clinical and histopathological examinations revealed significant amelioration of inflammation in eyes treated with taurolidine and vancomycin when compared with polyvinylpyrrolidone. The eyes treated with taurolidine also had significantly lower colony forming units than the eyes treated with polyvinylpyrrolidone and taurolidine rendered many eyes sterile. CONCLUSION: Taurolidine is expected to be a potential agent for treatment of S. epidermidis endophthalmitis.

Animals↗
PubMed2004

Ophthalmic techniques described by Serefeddin Sabuncuoğlu (1385-1468 AD).

Serefeddin Sabuncuoğlu (1385-1468 AD) was a Turkish surgeon who lived in the Ottoman Empire during the fifteenth century, a time of progressive expansion. When in his eighties, he wrote Cerrahiyyetü'l-Haniyye, which means Imperial Surgery. His book is the first example of an illustrated surgical textbook in the Turkish-Islamic medical literature. The importance of his book rests upon the inclusion of colour miniatures of the surgical procedures, incisional techniques and instruments, all drawn by Sabuncuoğlu himself. Only three hand-written copies exist, two of which were originally written by the author and are currently exhibited in Paris and Istanbul. The book was rediscovered in 1936, but some parts of it are still suspected to be missing. At present, the book consists of three chapters divided into 193 known sections. The sections deal with all fields of surgery including ophthalmology, and cite relevant Greek, Arabic and Persian textbooks. In this historical article the sections of Cerrahiyyetü'l-Haniyye pertinent to ophthalmology are critically reviewed, including a selection of the coloured drawings.

Eye Diseases↗