Yazar "Batay, F." seçeneğine göre listele

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    Critically located cavernous malformations
    (Georg Thieme Verlag Kg, 2007) Batay, F.; Baderrici, G.; Deda, H.
    Introduction: The aim of this study was to evaluate the clinical results of patients who underwent resection with the aid of microsurgical techniques and stereotactic and image-guided surgery for critically located cavernous malformations which still represent a considerable surgical challenge due to the close proximity of vital and eloquent structures. Methods: Between 1997 and 2003,12 patients with critically located cavernous malformations (CMs) underwent surgical resections at Ankara University Hospital. CMs of the pons (n=3), medulla oblongata. (n=l), cavernous sinus (n=3), motor cortex (n=4) and the newly defined superior cerebellar peduncle (n=l) were treated using image-guidance and advanced microsurgical principles. Preoperative assessment was done with CT, MRI and angiography. Lesion locations, clinical presentations and outcome were analyzed. The surgical approach was chosen as lateral suboccipital (n = 4), parietal (n = 4), cranioorbitozygomatic (n = 3) and retrosigmoid (n = 1). Results: All CMs were readily identified and completely removed with no permanent morbidity and mortality. The immediate outcome after surgery was improved for 8 patients (66.6%). Long-term outcome was unchanged for one patient and a proved good surgical outcome for three patients, during the mean follow-up period. Discussion: Stereotactic methods together with image-guidance and microsurgical techniques allow the creation of most effective and safe corridors to access the CMs in eloquent regions with a minimization of tissue manipulation and low risk of permanent neurological deficit.
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    The morphometric and cephalometric study of anterior cranial landmarks for surgery
    (Georg Thieme Verlag Kg, 2008) Kazkayasi, M.; Batay, F.; Bademci, G.; Bengi, O.; Tekdemir, I.
    Objective: The aim of this work was to determine reliable bony landmarks for the anterior skull base and to standardize some specific dimensions among the frontal sinus and neighboring structures for safe anterior cranial surgery. Methods: The study consisted of a topographical anatomic examination and cephalometric analysis of the skull. Thirty adult skulls (60 sides) were studied regarding the localization and dimensions of the supraorbital foramen (SOF), frontal sinus (FS), frontozygomatic fissure, infraorbital foramen, anterior nasal spine, and nasion. Differences between the measurement of skulls and cephalograms were analyzed by Student's t test. The Pearson correlation test was used for statistical analysis of the cephalogram. Results: Examination of the 60 sides of the bony heads revealed that the shape of the SOF was a foramen in 25 sides (41%), a notch in 29 sides (49%), and a groove in 6 sides (10%). A total of 20 (33%) SOFs were inside the FS and the mean distance was 6.3 + 1.34 mm from the lateral border of the sinus, 27 (45%) of SOFs were outside of the FS and the mean distance was 8.8 + 2.01 mm, and 13 (22%) of SOFs were at the border of the FS. According to our measurements the medial border of the craniotomy should be placed approximately 43 mm lateral to the nasion to avoid entering into the frontal sinus. Conclusion: To plan and to decide the convenient and safe anterior midline skull base approach and to avoid postoperative complications, bony landmarks and anatomic measurements around the SOF and FS will be helpful for the surgeon to constitute a simplification of topographic anatomy.
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    "Triple cross" of the hypoglossal nerve and its microsurgical impact to entrapment disorders
    (Georg Thieme Verlag Kg, 2006) Bademci, G.; Batay, F.; Yaşargil, M. G.
    Objective: Cadaveric dissections were performed to review the intracranial and extracranial course of the hypoglossal nerve. The neurological significance of a newly defined "triple cross" of the hypoglossal nerve is discussed. Materials and Methods: 10 cadaveric heads (left and right; 20 sides) were dissected using microsurgical techniques. Results: In the cisternal segment of hypoglossal nerve, the diameter of the rostral trunk amounted to 155-680 mu m (mean 435 mu m), and the caudal trunk to 210-820 mu m (mean 482 mu m). The roots formed three trunks in 20% of the hypoglossal nerves and two trunks in the rest. As a first cross, the anterior medullary segment of the vertebral artery crossed the hypoglossal nerve roots in 14 of 20 sides (70%). As a rare variation, the vertebral artery extended medial to the nerve (25%) or between its roots (5%). The second cross was found between the descendens hypoglossus and the occipital artery (75%), sternocleidomastoid artery and vein complex (15%) and external carotid artery (10%). The third cross was shown in the submandibular triangle between the lingual hypoglossus and its drainage vein; vena committans nervus hypoglossus. Conclusion: Throughout its way, the hypoglossal nerve passes over vascular structures in three crossing points which may serve as a probable cause of hypoglossal nerve entrapment disorders.