Retraction: Suat Canbaz et al. Bilateral Popliteal Artery Aneurysms with Rupture and Pseudoaneurysm Formation on the Left. Yonsei Med J 2003;44:159-62

Suat Canbaz 연세대학교의과대학 2007 Yonsei medical journal Vol.48 No.6

The effect of high-temperature on foamed concrete

Mehmet Canbaz,Hafid Dakman,Barış Arslan,Arda Büyüksungur 사단법인 한국계산역학회 2019 Computers and Concrete, An International Journal Vol.24 No.1

Within the scope of this study, the foam solution was prepared by properly mixing sulfonate based foam agent with water. Furthermore, this solution was mixed with the mixture of fine sand, cement, and water to produce foamed concrete. The mixture ratios which are the percentage of foam solution used in foam concrete were chosen as 0, 20, 40 and 60% by vol. After these groups reached 28 days of strength, they were heated to 20, 100, 400 and 700°C respectively. Afterward, high-temperature effects on the foamed concrete were obtained by employing physical and mechanical properties tests. Additionally, SEM (scanning electron microscope) and EDX (energy-dispersive X-ray spectroscopy) tests were employed to analyze the microstructure, and μ-CT (micro computed tomography) images were used to reconstruct 3-D models of the heat-treated specimens. Then, these models are analyzed to examine the void structures and the changes in these structures due to the high temperatures. The study has shown that the void structures reduce the high-temperature effects and the foam solution could be mixed with concrete up to 40 % by vol. where the high strength of foamed concrete is non-mandatory.

A Comparison between the Thermomechanical and Structural Changes in Textured PET Yarns after Superheated Steam and Dry Heat Treatment

Karakas, Hale-Canbaz The Korean Fiber Society 2004 Fibers and polymers Vol.5 No.1

PET yarns textured at different texturing conditions were treated with superheated steam or dry heat at different temperatures for different times. The effects of the treatment conditions on the thermomechanical and structural changes of the yarn were examined by shrinkage, X-ray diffraction and birefringence measurements. With increase in superheated steam temperature, the crystalline orientation factor and birefringence decreased, whereas crystal size increased. Dry heat treatment had a smaller effect on shrinkage and structural properties in comparison with superheated steam treatment. The additional shrinkage after texturing process was investigated. The effect of heat-setting in both media was more significant at $200^{\circ}C$. The time dependence of the properties was not linear.

Ruptured Internal Carotid Artery Pseudoaneurysm 10 Years after Cervical Spine Surgery

Baran Şimşek,Volkan Yüksel,Serhat Hüseyin,Orkut Güçlü,Suat Canbaz 대한혈관외과학회 2019 Vascular Specialist International Vol.35 No.2

An iatrogenic internal carotid artery (ICA) pseudoaneurysm is an extremely rare complication of cervical spine surgery. Here we report an extraordinary case of massive hematemesis due to a ruptured ICA pseudoaneurysm caused by the laminoplasty plate 10 years after cervical spine surgery. Computed tomography angiography revealed a ruptured 4×10-mm left extracranial ICA pseudoaneurysm probably connected to the pharynx. Emergent surgery was performed because of the uncontrolled massive bleeding. After complete resection of the injured segment, an interposition graft with a 6-mm polytetrafluoroethylene graft was placed and the fistula tract to the pharynx was repaired.

Hospitalization Risk According to Geriatric Assessment and Laboratory Parameters in Elderly Hematologic Cancer Patients

Silay, Kamile,Akinci, Sema,Silay, Yavuz Selim,Guney, Tekin,Ulas, Arife,Akinci, Muhammed Bulent,Ozturk, Esin,Canbaz, Merve,Yalcin, Bulent,Dilek, Imdat Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.2

Background: Utilizing geriatric screening tools for the identification of vulnerable older patients with cancer is important. The aim of this study is to evaluate the hospitalization risk of elderly hematologic cancer patients based on geriatric assessment and laboratory parameters. Materials and Methods: In this cross sectional study 61 patients with hematologic malignancies, age 65 years and older, were assessed at a hematology outpatient clinic. Standard geriatric screening tests; activities of daily living (ADL), instrumental activities of daily living (IADL), Mini Nutritional Assessment (MNA), Mini Mental State Examination (MMSE), timed up and go test (TUG), geriatrics depression scale (GDS) were administered. Demographic and medical data were obtained from patient medical records. The number of hospitalizations in the following six months was then recorded to allow analysis of associations with geriatric assessment tools and laboratory parameters. Results: The median age of the patients, 37 being males, was 66 years. Positive TUG test and declined ADL was found as significant risk factors for hospitalization (p=0.028 and p=0.015 respectively). Correlations of hospitalization with thrombocytopenia, vitamin B12 and folic acid deficiency were statistically significant (p=0.004, p=0.011 and p=0.05 respectively). Conclusions: In this study, geriatric conditions which are usually unrecognized in a regular oncology office visit were identified. Our study indicates TUG and ADL might be use as predictive tests for hospitalization in elderly oncology populations. Also thrombocytopenia, and vitamin B12 and folic acid deficiencies are among the risk factors for hospitalization. The importance of vitamin B12 and folic acid vitamin replacement should not be underestimated in this population.

The Myth of Not Disclosing the Diagnosis of Cancer: Does it Really Protect Elderly Patients from Depression?

Silay, Kamile,Akinci, Sema,Ulas, Arife,Silay, Yavuz Selim,Akinci, Muhammed Bulent,Ozturk, Esin,Canbaz, Merve,Dilek, Imdat,Yalcin, Bulent Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.2

Background: The disclosure of a diagnosis of cancer is complex, particularly in older patients. The aim of this study was to investigate the association between age and not knowing the diagnosis, and its impact on mood. Materials and Methods: The study included 70 patients with various types of solid and hematologic cancer in early stages, which were followed up in an outpatient oncology/hematology clinic in Turkey between January, 2014 and June, 2014. Initially the caregivers of patients were asked whether the patients knew their diagnosis or not. A questionnaire for the Geriatric Depression Scale was then administered to the patients. Patient age, gender, marital status and education level were noted and analyzed with respect to knowing the diagnosis and depression. Results: Of the 70 patients, 40% of them were female. The mean age was $68.2{\pm}8.9$. The rate of the patients who does not know their diagnosis was 37.1% (n=26). The overall depression rate with GDS was found 37.1% (n=26) among the participants. There was no association with knowing the diagnosis (p=0.208) although the association between not knowing the diagnosis and age was significant (p=0.01). Conclusions: In this study we revealed no association between not knowing the diagnosis and depression in elderly patients. Contrary to what some has thought, the patient is not protected from psychological distress by not being informed about the diagnosis. We believe this study and similar ones will help to discuss and further explore patient autonomy, the principle of respect to self-determination and end of life issues in different cultures.

Pectus Excavatum and Pectus Carinatum: Associated Conditions, Family History, and Postoperative Patient Satisfaction

Pinar Kuru, M.D.,Aylin Cakiroglu, M.I.,Aynur Er, M.S.,Hincal Ozbakir, M.I.,Ali Emin Cinel, M.S.,Busra Cangut, M.S.,Merve Iris, M.S.,Berkay Canbaz, M.S.,Ebru Pıçak, M.S.,Mustafa Yuksel, M.D. 대한흉부외과학회 2016 Journal of Chest Surgery (J Chest Surg) Vol.49 No.1

Background: Pectus excavatum (PE) and pectus carinatum (PC) are the most common chest wall deformities. In this study, we aimed to characterize how patients obtained information about these deformities, as well as patients’ family history, associated medical problems, and postoperative satisfaction after the Nuss and Abramson procedures. Methods: This cross-sectional retrospective study included patients who were operated by a single surgeon between 2006 and 2013. Follow-up calls were made after approval of our institution’s ethics committee. We reached 207 of the 336 PE patients (61.6%) and 73 of the 96 PC patients (76%). Results: The majority of the patients were male (85% of the PE patients and 91.8% of the PC patients). The age of diagnosis of PE was 14.52±0.51 years and the age at the time of operation was 17.89±0.42 years; for PC patients, the corresponding ages were 15.23±0.55 years and 16.77±0.55 years, respectively. A total of 70% of the PE patients and 63.8% of the PC patients obtained information about pectus deformities through the Internet. In 27.1% of the PE patients with an associated anomaly, 57.1% (n=13) had scoliosis, while 41.1% of the PC patients with an associated anomaly had kyphosis (n=5). Postoperative satisfaction, as evaluated on a scale from 0 to 10, was 8.17±0.15 for PE patients and 8.37±0.26 for PC patients. The postoperative pain duration was 51.93±5.18 days for PE patients and 38.5±6.88 days for PC patients. Conclusion: In this study, we found that most patients with pectus deformities were male. The Internet was an important resource for patients to learn about their deformities. Family history and associated anomalies were identified as important aspects for consideration in the clinical setting. The patients reported high levels of postoperative satisfaction, and pain management was found to be one of the most important elements of postoperative care.