Yazar "Menekse, Guner" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim Yok
    Öğe
    The Effects of Stereotactic Cerebroventricular Administration of Albumin, Mannitol, Hypertonic Sodium Chloride, Glycerin and Dextran in Rats with Experimental Brain Edema
    (Turkish Neurosurgical Soc, 2017) Ates, Tuncay; Gezercan, Yurdal; Menekse, Guner; Turkoz, Yusuf; Parlakpinar, Hakan; Okten, Ali Ihsan; Akyuva, Yener
    AIM: To evaluate the effects of cerebroventricular administration of hyperoncotic/hyperosmotic agents on edematous brain tissue in rats with experimental head trauma. MATERIAL AND METHODS: The study included 54 female Sprague-Dawley rats with weights ranging between 200 and 250 g. Six experimental groups were examined with each group containing 9 rats. All rats were exposed to head trauma, and treatment groups were administered 2 mu l of one of the drugs (albumin, mannitol, hypertonic sodium chloride (NaCl), glycerin and dextran) 6, 12 and 24 hours after the trauma via the cerebroventricular route and using a stereotactic device. Rats were sacrificed 48 hours after the trauma, and brain tissues were extracted without damage. Biochemical analyses including reduced glutathione (GSH), nitric oxide (NO), malondialdehyde (MDA), tumor necrosis factor alpha (TNF-alpha), and interleukin 1 beta (IL-1 beta) were performed on the injured left hemisphere. RESULTS: Compared with the control group, the albumin, mannitol, 3% NaCl and glycerin treatment groups revealed dramatic increases in GSH levels (p < 0.001). Levels of MDA, which is the end-product of brain edema and lipid peroxidation, failed to show a statistically significant decrease, but there was a decreasing trend observed in the inter-group comparisons. NO levels were also decreased in the 3% NaCl treatment group. An analysis of TNF-alpha and IL-1 beta, two proinflammatory cytokines associated with the trauma, revealed that IL-1 beta decreased significantly in all treatment groups (p=0.001), whereas no significant difference was detected in TNF-alpha levels. CONCLUSION: Cerebroventricular administration of hyperoncotic/hyperosmotic agents provides substantial effects on the treatment of brain edema.
  • Küçük Resim
    Öğe
    Surgical treatment of intracranial meningiomas in patients over 65 years old: A retrospective study of 70 cases
    (2017) Menekse, Guner; Gezercan, Yurdal; Okten, Ali Ihsan
    Aim: Intracranial meningiomas are the most common types of brain tumor in patients over 65 years of age. Surgical resection in this group of patients may be at risk of severe complications, due to limited physiological capacities and the presence of comorbidities. This retrospective study aimed to summarise outcome data of patients older than 65 years who underwent surgery for intracranial meningioma at our clinic between Jan 2007 and Dec 2012. Materials and Methods: Medical records of 70 cases diagnosed with intracranial meningioma were retrospectively reviewed. Demographic and clinical data (age, sex, symptoms), tumor localization, histopathologic properties, American Society of Anesthesiology (ASA) class, complications of the early postoperative period were analyzed. Results: Male/female ratio was 0.37 and mean age was 71.3. The most common experienced symptoms were headache (78.5%), motor deficit (18.5%) and seizure (17.1%). Tumors were mostly settled to convexities (34.3%) and parasagittal regions (17.1%). Histopathological diagnoses were classified as follows; Meningothelial (40.0%), transitional (18.6%), fibroblastic (114%) and psammomateous (11.4%). Postoperative complications were manifested in 10 of 70 patients (14.2%) Complication rate was prominently higher in patients with class III and IV of ASA class. Conclusions: Surgery for intracranial meningiomas in selected elderly patients is beneficial. Old age alone should not be used as a selection criterion for treatment.