Browsing by Author "Erbuyun, K"

Now showing 1 - 6 of 6
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    The Assessment of Parental Anxiety in Pediatric Surgery Cases
    Asik, K; Erbuyun, K; Taskin, EO; Yilmaz, O; Demet, A; Tekin, I; Ok, G; Asik, EA
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    Hearing loss does not occur in young patients undergoing spinal anesthesia
    Ok, G; Tok, D; Erbuyun, K; Aslan, A; Tekin, I
    Background and Objectives: Although uncommon, hearing loss after spinal anesthesia has been described. Vestibulocochlear dysfunction after spinal anesthesia in which 22-gauge and 25-gauge Quincke needles were used was investigated to determine if needle size affected hearing. Methods: Patients with American Society of Anesthesiologists physical status I and II, aged 20 to 40 years, who were undergoing lower extremity surgery under spinal anesthesia were randomized into 2 groups. After intravenous hydration, 3 mL of 0.5% bupivacaine was administered for spinal anesthesia, which was performed with a 22-gauge Quincke needle in group I (n = 30) patients and a 25-gauge Quincke needle in group II (n = 30) patients. Before surgery and 2 days after surgery, pure-tone audiometry and tympanometry were performed. Preoperative and postoperative hearing data were obtained in the right and left ears for every frequency. Headache, nausea, and vomiting and cranial nerve III, IV, V, VI, VII, and VIII function were assessed on postoperative day 2. Results: Demographic data were not different between the groups. No hypoacousis was noted at any frequency during the entire testing period in either group. Two patients from group I experienced postdural puncture headache on postoperative day 3, and neither had hearing loss. No patient had cranial nerve dysfunction. Conclusions: We were unable to induce hearing loss in young patients undergoing spinal anesthesia by injecting the anesthetic with a 22-gauge or a 25-gauge Quincke needle.
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    A comparison of the neuroablative effects of conventional and pulsed radiofrequency techniques
    Vatansever, D; Tekin, I; Tuglu, I; Erbuyun, K; Ok, G
    Objectives: To compare the neuroablative effects of pulsed radiofrequency (PRF) and conventional radiofrequency (CRF) techniques on the sciatic nerve, a peripheral nerve that includes motor, sensory, and autonomous fibers. Methods: The study consisted of 5 groups of 6 adult male Wistar rats. In the control group, no procedure was performed. In the sham group, electrode placement was the same as the other groups, but radiofrequency energy was not given to the rats. In the CRF40 group, 40 degrees C CRF was applied to the rats for 90 seconds. In the CRF80 group, 80 degrees C CRF was applied for 90 seconds. In the PRF group, the rats received 45 V PRF, which did not exceed 42 degrees C for 240 seconds. Two days later, sciatic nerve samples were taken. All specimens were evaluated both with light and electron microscopy. Sciatic nerve morphology was analyzed to compare the effects of CRF and PRF. Kruskal-Wallis and Mann-Whitney U tests were used for comparing the means. Results: Minimal damage was observed in the control group, but damage increased in the sham group and became increasingly more distinct in the PRF, CRF40, and CRF80 groups. Discussion: Nerve tissues can be affected during any type of procedure, even during surgical applications. Our results suggest that PRF is less destructive than CRF for the peripheral nerves. However, this idea should also be investigated at the molecular level, and safety analysis should be performed for routine clinical practice.
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    An alternative method of prosthetic mitral valve implantation in the presence of extensive calcification
    Sirin, BH; Iskesen, I; Erbuyun, K
    Annular calcifications carry some technical difficulties for success in conventional valve surgery. In this paper we present an easy alternative mitral valve replacement method applied for a patient with a heavily calcified mitral annulus. Excision of both leaflets and partial resection of the annular calcification with an ultrasonic dissector allowed the intra-atrial insertion of a 33-mm Omnicarbon monoleaflet prosthetic valve through a smaller opening of the left posterior atrium. The technical difficulties in inserting a prosthetic valve in a patient with a heavily calcified mitral annulus are discussed.
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    A comparison of conventional and pulsed radiofrequency denervation in the treatment of chronic facet joint pain
    Tekin, I; Mirzai, H; Ok, G; Erbuyun, K; Vatansever, D
    Objectives: The goal of this study was to compare the effects of conventional radiofrequency (CRF) and pulsed RF (PRF) denervation to medial branches of dorsal rami in the treatment of facet joint pain. Methods: The patients greater than 17-year old, with continuous low back pain with or without radiating pain with focal tenderness over the facet joints, pain on hyperextension, absence of neurologic defect, unresponsiveness to conservative treatment, no radicular syndrome, and no indication for low back surgery were included in the study. Local anesthetic was applied in the control group (n = 20), whereas 80 degrees C CRF were applied in the CRF (n = 20) and 2 Hz PRF were applied in the PRF group (n = 20). Pain relief was evaluated by visual analog scale (VAS) and Oswestry Disability Index (ODI) at preprocedure, at procedure, at 6 months and 1 year after the procedure. Reduction in analgesic usage, patients' satisfaction, and complications were assessed. Results: Mean preprocedural VAS and ODI scores were higher than postprocedural scores in all groups. Both VAS and ODI scores of PRIF and CRF groups were lower than the score of the control group at the postprocedural evaluation. Although decrease the pain score was maintained in the CRF group at 6 months and 1-year period, this decrease discontinued in the PRIF group at the follow-up periods. The number of patients not using analgesics and patient satisfaction were highest in CRF group. Discussion: PRF and CRF are effective and safe alternatives in the treatment of facet joint pain but PRF is not as long lasting as CRF.
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    The effect of remifentanil on the emergence characteristics of children undergoing FBO for bronchoalveolar lavage with sevoflurane anaesthesia
    Ozturk, T; Erbuyun, K; Keles, GT; Ozer, M; Yuksel, H; Tok, D
    Background and objective The aim of this study was to compare the effects of sevoflurane vs. sevoflurane and remifentanil on cough and agitation during emergence and recovery after fiberoptic bronchoscopy. Methods Children between 2 and 6 years of age undergoing fiberoptic bronchoscopy were enrolled. All patients were premedicated with oral midazolam. Patients were randomly assigned to either group S (sevoflurane alone, n=25) or group SR (sevoflurane with remifetanil, n=25). Anaesthesia was induced and maintained with sevoflurane in all patients. Group SR received remifentanil at a bolus dose of 1 mu g/kg over 2 min followed by a maintenance infusion of 0.15 mu g/kg/min. In addition to routine anaesthesia documentation, agitation scores and cough scores were recorded every 5 min during emergence and recovery. Results Duration of the procedure, anaesthesia and emergence phases was similar in both groups (P>0.05). Time until recovery was significantly shorter in group SR than in group S (7.0 +/- 5.5 min and 13.0 +/- 3.5 min, respectively; P = 0.001). Cough scores were not significantly different between the two groups during emergence and recovery (Kruskal-Wallis ANOVA test, P>0.05). However, the mean agitation score at 5 min in group SR was significantly higher than that in group S (Kruskal-Wallis ANOVA test, P<0.01). One case of hypoxaemia from thoracic rigidity occurred in a patient in group SR. Conclusion The addition of remifentanil significantly shortened recovery time in children undergoing fiberoptic bronchoscopy under sevoflurane anaesthesia. In the recovery period, remifentanil did not decrease cough, and increased agitation. Eur J Anaesthesiol 26:338-342 (c) 2009 European Society of Anaesthesiology.