Orkide Güzel
Boston Children's Hospital
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Publication
Featured researches published by Orkide Güzel.
Journal of Child Neurology | 2015
Önder Doksöz; Orkide Güzel; Ünsal Yılmaz; Rana İşgüder; Kübra Çeleğen; Timur Meşe; Utku Uysal
The aim of this prospective study is to investigate the effect of a 6-month-long ketogenic diet on carotid intima-media thickness, carotid artery, and aortic vascular functions. Thirty-eight drug-resistant epileptic patients who were being treated with ketogenic diet were enrolled. Fasting total cholesterol, high-density lipoprotein, low-density lipoprotein, triglycerides, total cholesterol, and glucose concentrations were measured and echocardiography was performed in all patients before the beginning of ketogenic diet and at the sixth month of treatment. The body weight, height, body mass index, serum levels of triglyceride, total cholesterol, and low-density lipoprotein increased significantly at month 6 when compared to baseline values (P < .05). Carotid intima-media thickness, elastic properties of the aorta, and carotid artery did not change at the sixth month of therapy compared to baseline values. A 6-month-long ketogenic diet has no effect on carotid intima-media thickness and elastic properties of the carotid artery and the aorta.
Journal of Child Neurology | 2014
Ünsal Yılmaz; Duygu Çubukçu; Tuba Sevim Yılmaz; Gulcin Akinci; Muazzez Özcan; Orkide Güzel
The aim of this study is to evaluate the types and clinical characteristics of peripheral facial palsy in children. The hospital charts of children diagnosed with peripheral facial palsy were reviewed retrospectively. A total of 81 children (42 female and 39 male) with a mean age of 9.2 ± 4.3 years were included in the study. Causes of facial palsy were 65 (80.2%) idiopathic (Bell palsy) facial palsy, 9 (11.1%) otitis media/mastoiditis, and tumor, trauma, congenital facial palsy, chickenpox, Melkersson-Rosenthal syndrome, enlarged lymph nodes, and familial Mediterranean fever (each 1; 1.2%). Five (6.1%) patients had recurrent attacks. In patients with Bell palsy, female/male and right/left ratios were 36/29 and 35/30, respectively. Of them, 31 (47.7%) had a history of preceding infection. The overall rate of complete recovery was 98.4%. A wide variety of disorders can present with peripheral facial palsy in children. Therefore, careful investigation and differential diagnosis is essential.
Seizure-european Journal of Epilepsy | 2014
Ünsal Yılmaz; Tuba Sevim Yılmaz; Gülşen Dizdarer; Gulcin Akinci; Orkide Güzel; Hasan Tekgul
PURPOSE Limited data are available for the effectiveness of the antiepileptic drugs in children in daily clinical practice. The aim of this study was to investigate the efficacy and tolerability of the first prescribed old and new antiepileptic drugs in children with newly diagnosed idiopathic epilepsy during a 12-month period. METHOD A total of 289 children (141 females and 148 males) who received phenobarbital (n=33), valproate (n=142), carbamazepine (n=42), oxcarbazepine (n=38), or levetiracetam (n=34) as the first-line treatment, were enrolled in the study. Seizure control and the occurrence of adverse events were assessed during a treatment period of 12 months. RESULTS Overall, 245 (84.8%) patients remained seizure-free during the study period. The rate of seizure control did not differ significantly between the drug groups (p=0.099). Forty-four (15.2%) patients including 1 (3.0%) treated with phenobarbital, 22 (15.5%) with valproate, 7 (16.7%) with carbamazepine, 10 (26.3%) with oxcarbazepine, and 4 (11.8%) with levetiracetam had treatment failure. There was no significant difference between seizure-free and failure groups in terms of age, gender, seizure type, and drugs used. Overall, 80 (27.7%) patients had adverse events, of those the most common ones were behavioral problems, nausea and/or vomiting, weight gain, and learning difficulties. The reasons for treatment failures were lack of seizure control in 29 (10.0%) patients and intolerable adverse events in 15 (5.2%) patients. CONCLUSION It appears that old (phenobarbital, valproate and carbamazepine) and new antiepileptic drugs (oxcarbazepine and levetiracetam) have similar efficacy and tolerability profiles. Institutional ethic number is 28.3.2013/14.
Pediatric Neurology | 2014
Rana İşgüder; Orkide Güzel; Hasan Ağın; Ünsal Yılmaz; Sanem Eren Akarcan; Tanju Çelik; Aycan Ünalp
BACKGROUND Levetiracetam has been proven to be effective in both partial and generalized seizures in children. However, few studies have reported its efficacy in the treatment of acute repetitive seizures. We aimed to investigate the efficacy and safety of levetiracetam in children with acute repetitive seizures. METHODS The medical records of children from the age of 1 month-18 years who received levetiracetam because of acute repetitive seizures in the pediatric intensive care unit between 2010 and 2013 were reviewed retrospectively. RESULTS Of the 133 patients, levetiracetam terminated seizures in 104 (78.2%). Side effects such as agitation and aggression were observed in three patients (2.2%). The likelihood of treatment failure was increased by four times by younger age at seizure onset; by six times in the individuals with neurological abnormalities; and by 22 times in the patients with West syndrome. The patients who used levetiracetam as the first treatment option for acute repetitive seizures had a longer duration of epilepsy, a higher rate of neurological abnormality, and a higher proportion of medically resistant epilepsy compared with the individuals who used levetiracetam as an add-on treatment to the other intravenous antiepileptic drugs. However, no differences were detected between these two groups in terms of treatment response. CONCLUSIONS Intravenous levetiracetam appears to be effective and safe in the treatment of acute repetitive seizures. Randomized clinical trials are needed to determine whether intravenous levetiracetam may replace other antiepileptic drugs as the first-line therapy in the management of acute repetitive seizures.
Pediatric Neurology | 2013
Ünsal Yılmaz; Nesrin Gülez; Duygu Çubukçu; Orkide Güzel; Gulcin Akinci; Aysel Öztürk
BACKGROUND Recurrent peripheral facial palsy is uncommon in children. It mostly occurs as an idiopathic disorder and to a lesser extent in the setting of some infectious, genetic, or systemic disorders. However, its association with familial Mediterranean fever has not been reported before. PATIENT We present a 14-year-old girl who experienced three episodes of right-sided peripheral facial palsy during a 9-month interval. She had a diagnosis of familial Mediterranean fever (homozygous with M694V mutation) and she had been receiving colchicine for 8 years. Recurrent peripheral facial palsy could be a neurological manifestation of vasculitis in familial Mediterranean fever. CONCLUSION Recurrent peripheral facial palsy may be a manifestation of familial Mediterranean fever in children.
Epilepsia Open | 2018
Eric H. Kossoff; Beth Zupec-Kania; Stéphane Auvin; Karen Ballaban-Gil; A. G. Christina Bergqvist; Robyn Blackford; Jeffrey Buchhalter; Roberto Horacio Caraballo; J. Helen Cross; Maria Dahlin; Elizabeth J. Donner; Orkide Güzel; Rana S. Jehle; Joerg Klepper; Hoon-Chul Kang; Danielle A. Lambrechts; Y.M. Christiana Liu; Janak K. Nathan; Douglas R. Nordli; Heidi H. Pfeifer; Jong M. Rho; Ingrid E. Scheffer; Suvasini Sharma; Carl E. Stafstrom; Elizabeth A. Thiele; Zahava Turner; María Vaccarezza; Elles J.T.M. van der Louw; Pierangelo Veggiotti; James W. Wheless
Ketogenic dietary therapies (KDTs) are established, effective nonpharmacologic treatments for intractable childhood epilepsy. For many years KDTs were implemented differently throughout the world due to lack of consistent protocols. In 2009, an expert consensus guideline for the management of children on KDT was published, focusing on topics of patient selection, pre‐KDT counseling and evaluation, diet choice and attributes, implementation, supplementation, follow‐up, side events, and KDT discontinuation. It has been helpful in outlining a state‐of‐the‐art protocol, standardizing KDT for multicenter clinical trials, and identifying areas of controversy and uncertainty for future research. Now one decade later, the organizers and authors of this guideline present a revised version with additional authors, in order to include recent research, especially regarding other dietary treatments, clarifying indications for use, side effects during initiation and ongoing use, value of supplements, and methods of KDT discontinuation. In addition, authors completed a survey of their institutions practices, which was compared to responses from the original consensus survey, to show trends in management over the last 10 years.
Journal of Pediatric Endocrinology and Metabolism | 2017
Engin Kose; Orkide Güzel; Korcan Demir; Nur Arslan
Abstract Background: Ketogenic diet (KD), which is high in fat and low in carbohydrates, mimics the metabolic state of starvation and is used therapeutically for pharmacoresistant epilepsy. It is known that generation of triiodothyronine (T3) from thyroxine (T4) decreases during fasting periods. The aim of this study was to evaluate the thyroid function of children receiving KD for at least 1 year due to drug-resistant epilepsy. Methods: A total of 120 patients [63 males, 52.5%; mean age 7.3±4.3 years, median interquartile range (IQR): 7.0 (4–10 years)] treated with KD for at least 1 year were enrolled. Seizure control, side effects, and compliance with the diet were recorded, and free T3, free T4, and thyroid-stimulating hormone (TSH) levels were measured at baseline and at post-treatment months 1, 3, 6, and 12. The Mann-Whitney U-test, repeated measures analysis of variance (ANOVA) with post-hoc Bonferroni correction, and logistic regression analysis were used for data analysis. Results: Hypothyroidism was diagnosed and L-thyroxine medication was initiated for eight, seven and five patients (20 patients in total, 16.7%) at 1, 3, and 6 months of KD therapy, respectively. Logistic regression analysis showed that baseline TSH elevation [odds ratio (OR): 26.91, 95% confidence interval (CI) 6.48–111.76, p<0.001] and female gender (OR: 3.69, 95% CI 1.05–12.97, p=0.042) were independent risk factors for development of hypothyroidism during KD treatment in epileptic children. Conclusions: KD causes thyroid malfunction and L-thyroxine treatment may be required. This is the first report documenting the effect of KD treatment on thyroid function. Thyroid function should be monitored regularly in epileptic patients treated with KD.
Seizure-european Journal of Epilepsy | 2016
Nur Arslan; Orkide Güzel; Engin Kose; Ünsal Yılmaz; Pınar Kuyum; Betül Yandim Aksoy; Tansel Çalık
PURPOSE Long-term ketogenic diet (KD) treatment has been shown to induce liver steatosis and gallstone formation in some in vivo and clinical studies. The aim of this retrospective study was to evaluate the hepatic side effects of KD in epileptic children. METHOD A total of 141 patients (mean age: 7.1±4.1years [2-18 years], 45.4% girls), receiving KD at least one year for intractable epilepsy due to different diagnoses (congenital brain defects, GLUT-1 deficiency, West syndrome, tuberous sclerosis, hypoxic brain injury, etc.) were included in the study. Serum triglyceride, cholesterol, aminotransferase, bilirubin, protein and albumin levels and abdominal ultrasonography were recorded before and at 1, 3, 6, and 12 months following after diet initiation. RESULTS The mean duration of KD was 15.9±4.3months. At one month of therapy, three patients had elevated alanine and aspartate aminotransferase levels. These patients were receiving ketogenic diet for Doose syndrome, idiopathic epilepsy and GLUT-1 deficiency. Hepatosteatosis was detected in three patients at 6 months of treatment. Two of these patients were treated with KD for the primary diagnosis of tuberous sclerosis and one for Landau Kleffner syndrome. Cholelithiasis was detected in two patients at 12 months of treatment. They were receiving treatment for West syndrome and hypoxic brain injury sequelae. CONCLUSION Long-term ketogenic diet treatment stimulates liver parenchymal injury, hepatic steatosis and gallstone formation. Patients should be monitored by screening liver enzymes and abdominal ultrasonography in order to detect these side effects.
Journal of Child Neurology | 2016
Rana İşgüder; Orkide Güzel; Gökhan Ceylan; Ünsal Yılmaz; Hasan Ağın
Because of the lack of studies comparing the efficacy and safety of levetiracetam and valproate before the induction of general anesthesia in the treatment of convulsive refractory status epilepticus in children, we aimed to compare the effectiveness of these antiepileptic drugs in patients with convulsive status epilepticus admitted to the Pediatric Intensive Care Unit between 2011 and 2014. Forty-six (59%) of the 78 patients received levetiracetam, and 32 (41%) received valproate for the treatment of refractory status epilepticus. The response rate was not significantly different between the 2 groups. Although no adverse event was noted in patients who received levetiracetam, 4 (12.5%) patients in the valproate group experienced liver dysfunction (P = .025). According to our results, levetiracetam and valproate may be used in the treatment of refractory status epilepticus before the induction of general anesthesia. Levetiracetam appears as effective as valproate, and also safer.
Pediatric Neurology | 2015
Önder Doksöz; Kübra Çeleğen; Orkide Güzel; Ünsal Yılmaz; Utku Uysal; Rana İşgüder; Mehmet Celegen; Timur Meşe
OBJECTIVE Our primary aim was to determine the short-term effects of a ketogenic diet on cardiac ventricular function in patients with refractory epilepsy. METHODS Thirty-eight drug-resistant epileptic patients who were treated with a ketogenic diet were enrolled in this prospective study. Echocardiography was performed on all patients before beginning the ketogenic diet and after the sixth month of therapy. Two-dimensional, M-mode, color flow, spectral Doppler, and pulsed-wave tissue Doppler imaging measurements were performed on all patients. RESULTS The median age of the 32 patients was 45.5 months, and 22 (57.8%) of them were male. Body weight, height, and body mass index increased significantly at the sixth month of therapy when compared with baseline values (P < 0.05). Baseline variables assessed by conventional M-mode echocardiography showed no significant difference at month 6 (P > 0.05). Doppler flow indices of mitral annulus and tricuspid annulus velocity of patients at baseline and month 6 showed no significant differences (P > 0.05). Tricuspid annular E/A ratio was lower at month 6 (P < 0.05). Although mitral annulus tissue Doppler imaging studies showed no significant difference (P > 0.05), there was a decrease in Ea velocity and Ea/Aa ratio gathered from tricuspid annulus at month 6 compared with baseline (P < 0.05). CONCLUSION A 6-month duration ketogenic diet does not impair left ventricular functions in children with refractory epilepsy; however, it may be associated with a right ventricular diastolic dysfunction.