Browsing by Author "Önay, Övsen"

Now showing 1 - 4 of 4

Citation Count: 8
Comparison of cervical and ocular vestibular-evoked myogenic potential responses between tone burst versus chirp stimulation
(Springer, 2021) Aydin, Canset; Onay, Ovsen; Tezcan, Elif Ilkay; Askar, Zuhal; Ozdek, Ali; Surgical Sciences
Purpose To compare the effectiveness of chirp and tone burst stimuli in oVEMP and cVEMP testing for healthy adults Methods This study was conducted in 56 healthy volunteers (112 ears). Ocular and cervical VEMP (oVEMP, cVEMP) tests were performed for each participant using tone burst and chirp stimuli. VEMP response rates, latency of each peak (p1-n1, n1-p1), peak to peak amplitude (p1-n1 amplitude and n1-p1 amplitude), and rectified amplitudes were measured and compared between these two different stimuli. Results VEMP response rates with chirp stimuli are higher than the tone burst stimuli for both cVEMP and oVEMP tests (The difference was statistically significant for oVEMP, p = 0.001). Chirp stimuli have higher p1n1 amplitude and rectified amplitude and shorter p1and n1 latency then tone burst stimuli for cVEMP (p = 0.015, p = 0.007, p < 0.001, p < 0.001, respectively). Chirp stimuli also have higher n1p1 amplitude and shorter n1and p1 latency then tone burst stimuli for oVEMP (p = 0.006, p < 0.001, p < 0.001, respectively). Conclusion The present findings show that the chirp stimulus triggers earlier VEMP responses with higher amplitudes than the tone burst stimulus during cVEMP and oVEMP testing. VEMP response rate with chirp stimulus is also higher than the tone burst. Therefore chirp stimulus can be used in VEMP testing as effectively as, if not more than, tone burst stimulus in clinical practice.
Citation Count: 2
Endonasal choanal atresia repair; evaluating the surgical results of 58 cases
(Turkish J Pediatrics, 2021) Bajin, Munir Demir; Onay, Ovsen; Gunaydin, Riza Onder; Unal, Omer Faruk; Yucel, Omer Taskin; Akyol, Umut; Aydin, Canset; Surgical Sciences
Background. Choanal atresia is the most common congenital nasal anomaly, with an incidence of 1:5000-1:8000 live births. Atresia can be seen as membraneous, bony or mixed type. When it is bilateral, it is accepted life-threatening, therefore bilateral atresia necessitates immediate intervention. Diagnosis is confirmed by endoscopic examination and computed tomography. The absolute treatment is surgical, and different approaches have been proposed. Methods. Herein, we describe our 15-year experience in the treatment of 58 patients of congenital choanal atresia with transnasal endoscopic approach, and we compare the efficacy of placement of an intranasal stent and applying mitomycin while endoscopic microsurgical repair. Results. The study included 41 female patients (71%) and 17 male patients (29%) with congenital CA. The mean age was 3 years ranging from 10 days to 16 years. The atretic plate was bilateral in 24 patients (41%) and unilateral in 34 (59%). The most common atresia type was the mixed type with 29 patients (50%). A total of 17 patients (29%) required postoperative revision(s). Postoperative revisions were more frequent among patients with bilateral CA (50%), and with mixed CA (31%). Stenting was used additionally by surgical correction for 10 patients. After stenting, fibrosis and restenosis was seen in 7 patients (79%). Mitomycin C was applied peroperatively in 8 patients. Restenosis after mitomycin application was seen in 4 patients (50%). Conclusions. By our experience, endoscopic microsurgical repair of atresia proved to be an effective and safe procedure, results compared with adjuvant treatment modalities like stent or mitomycin C use, was not better. Restenosis was the major problem seen after surgical correction.
Citation Count: 4
Human laryngeal squamous cell carcinoma cell line release of endogenous anandamide and 2-arachidonoylglycerol, and their antiproliferative effect via exogenous supplementation: an in vitro study
(Springer, 2022) Onay, Ovsen; Kose, Sevil; Suslu, Nilda; Korkusuz, Petek; Nemutlu, Emirhan; Aydin, Canset; Hosal, Sefik; Surgical Sciences; Nutrition and Dietetics
The level of the major endocannabinoids anandamide (AEA) and 2-arachidonoylglycerol (2-AG) are altered in several types of carcinomas, and are known to regulate tumor growth. Thusly, this study hypothesized that the HEp-2 human laryngeal squamous cell carcinoma (LSCC) cell line releases AEA and 2-AG, and aimed to determine if their exogenous supplementation has an anti-proliferative effect in vitro. In this in vitro observational study a commercial human LSCC cell line (HEp-2) was used to test for endogenous AEA and 2-AG release via liquid chromatography-tandem mass spectrometry (LC-MS/MS). The anti-proliferative effect of AEA and 2-AG supplementation was evaluated via WST-1 proliferation assay. It was observed that the HEp-2 LSCC cell line released AEA and 2-AG; the median quantity of AEA released was 15.69 ng mL(-1) (range: 14.55-15.95 ng mL(-1)) and the median quantity of 2-AG released was 2.72 ng (-1) (range: 2.67-2.74 ng mL(-1)). Additionally, both AEA and 2-AG exhibited an anti-proliferative effect. The anti-proliferative effect of 2-AG was stronger than that of AEA. These findings suggest that AEA might function via a CB1 receptor-independent pathway and that 2-AG might function via a CB2-dependent pathway. The present findings show that the HEp-2 LSCC cell line releases the major endocannabinoids AEA and 2-AG, and that their supplementation inhibits tumor cell proliferation in vitro. Thus, cannabinoid ligands might represent novel drug candidates for laryngeal cancers, although functional in vivo studies are required in order to validate their potency.
Citation Count: 0
Premenstrual Syndrome as a Sleep Disturbing Factor: A CrossSectional Study
(2021) Önay, Övsen; Aydın, Canset; Surgical Sciences
Objective: To evaluate the lifestyle factors possibly related with premenstrual syndrome which were body mass index, coffee intake, smoking, regular physical exercise, and alcohol consumption, and investigate the impact of these lifestyle factors and premenstrual syndrome on sleep quality. Methods and Methods: This cross-sectional study included 265 participants, and all applied Pittsburgh Sleep Quality Index and Premenstrual Syndrome Scale questionnaires. Results: The prevalence of premenstrual syndrome among the participants was 57% (n:150). Participants with premenstrual syndrome had shorter total sleep time (p:0.001). Also, they needed longer time to fall asleep (p:0.001). The Pittsburgh Sleep Quality Index scores of the participants with premenstrual syndrome were higher than those without premenstrual syndorme (p<0.001), indicating poor sleep quality. It was observed that the participants with premenstrual syndrome had more coffee intake (p:0.040) and more regular physical activity (p:0.009), which were risk factors of premenstrual syndrome. premenstrual syndrome positivity was associated with increased poor sleep quality in both univariate and multivariate analyses (OR:5.93 95% CI: 3.46- 10.15, p<0.001; OR:5.61 95% CI: 3.19-9.88, p<0.001, respectively). The remaining variables, which were risk factors of premenstrual syndrome, didn’t have any statistically significant association with sleep quality. Conclusion: The important relation between premenstrual syndrome and sleep quality is highlighted. Relief of premenstrual syndrome complaints may lead to better sleep quality and enhancement of quality of life for a woman.