Cross-Cultural Adaptation, Validity, and Reliability Study of the Turkish Version of the Back Pain Functional Scale

Gokhan Maras,Shahed Sheidayi,Gokhan Yazici,Melek Volkan Yazici,Gurkan Gunaydin,Seyit Citaker 대한척추외과학회 2019 Asian Spine Journal Vol.13 No.4

Study Design: Prospective study. Purpose: To investigate the cross-cultural adaptation, validity, and reliability of the Turkish version of the Back Pain Functional Scale (BPFS). Overview of Literature: Low back pain is a common disorder in the population that negatively affects the patient’s daily, professional, and social life. Self-report questionnaires are important to precisely evaluate back pain and making better and appropriate treatment decisions. Currently, there are several questionnaires for investigating mobility in patients with low back pain. Methods: We recruited 360 patients with chronic low back pain. For assessing the reliability of the scale, we performed test–retest and internal consistency analyses. Test–retest analysis was performed using intraclass correlation coefficient (ICC). Internal consistency was analyzed by calculating Cronbach’s alpha value. Construct validity of the questionnaire was evaluated by comparing total scores on the BPFS with those on Roland Morris Disability Questionnaire (RMDQ) and Oswestry Disability Index (ODI) using Pearson’s correlation coefficient analysis. Results: Cronbach’s alpha value was 0.910, indicating high internal consistency. The test–retest reliability was excellent (ICC, 0.958; 95% confidence interval, 0.710–0.908). No floor or ceiling effects were observed. Factor analysis indicated that the scale had a single-factor structure. Pearson correlation coefficient was −0.669 when BPFS was compared with RMDQ and −0.701 when compared with ODI. These values indicate a significant correlation of BPFS with RMDQ and ODI. Conclusions: These data indicate the validity and reliability of the Turkish version of the BPFS.

An investigation of the relationship between metacognition and mathematics achievement

Gokhan Ozsoy 서울대학교 교육연구소 2011 Asia Pacific Education Review Vol.12 No.2

The aim of this study is to determine fifth-grade students' metacognitive knowledge and skills and its relationship with mathematics achievements. A total of 242 primary school students from six different schools were participated in the study. Turkish version of Metacognitive Knowledge and Skills Assessment (MSA-TR) was used to measure metacognitive knowledge and skills. The results demonstrated a significant and positive relationship (r = .648, p < .01) between metacognition and mathematics achievement. Furthermore, research results showed that 42% of total variance of mathematics achievement could be explained with metacognitive knowledge and skills.

Evaluation of the morphology of the canalis sinuosus using cone-beam computed tomography in patients with maxillary impacted canines

Gokhan Gurler,Cagri Delilbasi,Emine Esen Ogut,Kader Aydin,Ufuk Sakul 대한영상치의학회 2017 Imaging Science in Dentistry Vol.47 No.2

Purpose: The nasopalatine canal is a well-known, important anatomical structure in the anterior maxilla, but this region contains many accessory canals. The canalis sinuosus (CS) is one of these canals; it contains the anteriorsuperior alveolar nerve, along with veins and arteries. The purpose of this study was to evaluate the CS using conebeam computed tomography (CBCT) in patients with maxillary impacted canines. Materials and Methods: A total of 111 patients admitted to the Istanbul Medipol University School of Dentistry for the exposure, orthodontic treatment, and/or extraction of an impacted canine were included in this study. CBCT images were obtained for these patients under standard conditions. Axial, coronal, and sagittal sections were evaluated to assess the prevalence of CS, the direction and diameter of the canal, its relation with the impacted canine, and its distance from the alveolar crest. Further, possible correlations with patient gender and age were analyzed. Results: The CS could be detected bilaterally in all the evaluated tomography images. The mean canal diameter was significantly larger in males than in females (P=.001). The CS ran significantly closer to the impacted canine when the canal was located horizontally (P=.03). Variations of the canal, such as accessory canals, were identified in 6 patients. Conclusion: CS is an anatomical entity that may resemble periapical lesions and other anatomical structures. Evaluation with CBCT prior to surgical procedures in the anterior maxilla will help to prevent overlooking such anatomical structures and to decrease possible surgical complications.

Effectiveness of thymoquinone, zeolite, and platelet-rich plasma in model of corrosive oesophagitis induced in rats

Gokhan Karaca,Oktay Aydin,Faruk Pehlivanli,Canan Altunkaya,Hafize Uzun,Osman Guler 대한외과학회 2017 Annals of Surgical Treatment and Research(ASRT) Vol.92 No.6

Purpose: The effectiveness of platelet-rich plasma (PRP), thymoquinone, and zeolite in corrosive esophageal burns was investigated in a rat model. Methods: Four groups were comprised as containing 10 rats in each group. For group I, oesophagitis was induced and no other procedure was performed (control group). For group II, oesophagitis was induced and thymoquinone was administered for 1 week via oral gavage once a day (thymoquinone group). For group III, oesophagitis was induced for 1 week via oral gavage once a day (PRP group). For group IV, oesophagitis was induced and zeolite was administered for 1 week via oral gavage once a day (zeolite group). On the 10th day, the rats were sacrificed under anaesthesia and venous blood sampling was performed from the vena portae. The oesophaguses were totally excised. Biochemically, interleukin (IL)-1B, IL-6, TNF-α, and MCP-1 were examined from venous blood. Inflammation score was evaluated histopathologically in oesophageal tissue that was collected. Results: There was a statistically significant difference among groups in terms of IL-1, IL-6, MCP levels, compared to the control group; median IL-1, IL-6, MCP levels of thymoquinone, PRP, and zeolite groups were statistically significantly lower. There was a statistically significant difference among groups in terms of inflammation scores, compared to group I; median inflammation scores of groups II, III and IV were statistically significantly lower thymoquinone. Conclusion: PRP, and zeolite exhibited positive effect on recovery in oesophagitis by reducing inflammation in the involved segment.

The effects of scalpel, harmonic scalpel and monopolar electrocautery on the healing of colonic anastomosis after colonic resection

Gokhan Karaca,M. Recep Pekcici,Canan Altunkaya,Vildan Fidanci,Aytul Kilinc,Huseyin Ozer,Ahmet Tekeli,Kuzey Aydinuraz,Osman Guler 대한외과학회 2016 Annals of Surgical Treatment and Research(ASRT) Vol.90 No.6

Purpose: In our study, the effects of harmonic scalpel, scalpel, and monopolar electrocautery usage on the health and healing of colon anastomosis after resection was investigated. Methods: In this study, 120 female albino Wistar rats were divided into 3 groups each containing 40 rats. Group A, resection with scalpel; group B, resection with monopolar electrocautery; group C, resection with harmonic scalpel. The groups were divided into 4 subgroups consisting of 10 rats and analysed in the postoperative 1st, 3rd, 5th, and 7th days. Anastomotic bursting pressures, hydroxyproline levels and histopathological parameters were surrogate parameters for evaluating wound healing. Results: The tissue hydroxyproline levels did not show any significant difference between the groups and subgroups. The mean bursting pressure of group A on the 5th day was significantly higher than groups B and C (P < 0.001). When the fibroblast and fibrosis scores were evaluated, scores of group C on the 5th day were significantly higher than the other groups, but the results of bursting pressures and biochemical parameters did not support the fibroblast and fibrosis scores. There were not any significant differences between the groups in other histopathologic parameters. Conclusion: The use of monopolar electrocautery needs more attention since the device causes tissue destruction. The obliterating effect of harmonic scalpel on luminal organs is an important problem, especially if an anastomosis is planned. Despite the disadvantages of scalpel, its efficacy on early wound healing is better than the other devices.

Value of Sentinel Lymph Node Biopsy in Breast Cancer Patients with Previous Excisional Biopsy

Gokhan Coskun,Lutfi Dogan,Niyazi Karaman,Cihangir Ozaslan,Can Atalay 한국유방암학회 2012 Journal of breast cancer Vol.15 No.1

Purpose: Sentinel lymph node biopsy (SLNB) in breast cancer patients with clinically negative axilla will ensure axillary dissection only for cases with lymph node metastasis and provide information about pathologic staging as accurate as the axillary dissection. It was shown that SLNB could be successfully performed regardless of the type of biopsy. The aim of this study was to investigate the feasibility of SLNB after excisional biopsy. Methods:One hundred patients diagnosed with excisional biopsy or guide wire-localization and operated on with SLNB between February 2007 and March 2009 were retrospectively analyzed. SLNB was performed with 10 cc of 1% methylene blue alone or both methylene blue and 1 mCi of Tc-99m nanocolloid combination. Age, tumor localization and size, length of the biopsy incision, size of the biopsy specimen, multifocality, lymphovascular invasion, tumor grade, staining with methylene blue, localization, number and metastatic status of the lymph nodes stained, and success rate with a gamma probe were evaluated. Results: Sentinel lymph node (SLN) could not be identified in 9 (16.9%) of patients in the methylene blue group (n=53). In the combination group (n=47), SLN could not be identified in one patient. Of 32 patients with negative SLNB, metastatic involvement was found to be present in 5 patients after axillary lymph node dissection (false negatives). The average numbers of SLNs found in the methylene blue group and combination group were 1.4 and 1.6, respectively. SLN detection and false negative rates in the methylene blue group were 83% and 15.7%, respectively. The rates for the combination group were 98% and 6.4%, respectively. None of the parameters related to patient, tumor or process were found to affect detection rates of SLN. Conclusion: Only SLNB using a combination method is a safe and reliable technique for breast cancer patients diagnosed with excisional biopsy.

Wireless sensor network protocol comparison for bridge health assessment

Gokhan Kilic 국제구조공학회 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.49 No.4

In this paper two protocols of Wireless Sensor Networks (WSN) are examined through both a simulation and a case study. The simulation was performed with the optimized network (OPNET) simulator while comparing the performance of the Ad-Hoc on demand Distance Vector (AODV) and the Dynamic Source Routing (DSR) protocols. This is compared and shown with real-world measurement of deflection from eight wireless sensor nodes. The wireless sensor response results were compared with accelerometer sensors for validation purposes. It was found that although the computer simulation suggests the AODV protocol is more accurate, in the case study no distinct difference was found. However, it was shown that AODV is still more beneficial in the field as it has a longer battery life enabling longer surveying times. This is a significant finding as a large factor in determining the use of wireless network sensors as a method of assessing structural response has been their short battery life. Thus if protocols which enhance battery life,such as the AODV protocol, are employed it may be possible in the future to couple wireless networks with solar power extending their monitoring periods.

Case Report : Subcutaneous Sarcoidosis with Plantar Involvement

( Gokhan Celik ),( Aydin Ciledag ),( Pinar Akin ),( Yasin Simsek ),( Akin Kaya ),( Numan Numanoglu ),( Yavuz Yener Saglik ),( Ayse Boyvat ),( Selim Erekul ) 대한피부과학회 2010 Annals of Dermatology Vol.22 No.4

Sarcoidosis is a multisystem granulomatous disorder of an unknown etiology. Subcutaneous sarcoidosis is a rare manifestation of sarcoidosis, and plantar involvement is extremely rare and there is only one such case report in the medical literature. Herein we present an interesting case of a patient who was diagnosed as having subcutaneous sarcoidosis at a plantar localization because plantar involvement is extremely rare and also because of the successful outcome after performing intralesional corticosteroid therapy. (Ann Dermatol 22(4) 435~438, 2010)

The effect of mesenchymal stem cell use on intraabdominal adhesions in a rat model

Gokhan Karaca,Faruk Pehlivanli,Oktay Aydin,Canan Altunkaya,Hafize Uzun,Mehmet Niyaz,Huseyin Ozden,Huri Bulut 대한외과학회 2018 Annals of Surgical Treatment and Research(ASRT) Vol.94 No.2

Purpose: Intra-abdominal adhesions (IAA) are among the most frequently seen pathologies in general surgery practice with an increased morbidity and mortality. In the present study, we investigated the effect of locally applied mesenchymal stem cells (MSCs) on IAA. Methods: Twenty-four Wistar Albino rats were used in the study. The rats were divided into three groups including: Sham, control, and MSCs group. On day 0, cecum was reached under anesthesia in all groups, except the Sham group. Scraping with a sponge was performed until petechial bleeding occurred. The control group received no treatment. In the stem cell group, MSCs were applied topically immediately after surgery on adhesions. The rats were sacrificed on day 10 and colon tissues and blood samples were collected for macroscopic, histopathological, and biochemical analysis. Results: In our study, E-selectin, P-selectin, TNF-α and IL-1 levels were statistically significantly lower in the MSC group than the control group, while the sham group has the lowest levels. In both the macroscopic and histopathological analyses (Zühlke’s scale), the least amount of adhesion was observed in the Sham group. In addition, although there was less adhesion in the MSC group than the control group, the difference did not reach statistical significance. Conclusion: Topical MSC application immediately after surgery suppresses the inflammatory process. However it was found to be ineffective in histopathological and macroscopic examinations performed on the 10th day.

Left Atrial Myxoma Mimicking Polyarteritis Nodosa

Gokhan Sargin,Taskin Senturk 연세대학교의과대학 2015 Yonsei medical journal Vol.56 No.4