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Hafızoğlu M, Yıldırım HK, Öztürk Y, Şahiner Z, Karaduman D, Atbaş C, Doğu BB, Halil MG, Cankurtaran M, Balcı C. Assessment of phase angle as a novel indicator for sarcopenic obesity according to the ESPEN/EASO criteria in older adults with diabetes mellitus. Nutrition 2024; 123:112412. [PMID: 38554459 DOI: 10.1016/j.nut.2024.112412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 01/10/2024] [Accepted: 02/25/2024] [Indexed: 04/01/2024]
Abstract
BACKGROUND Sarcopenic obesity (SO) is a clinical condition in which sarcopenia and obesity occur together, and is associated with more poor clinical outcomes, increased mortality, and morbidity than sarcopenia. Phase angle (PhA), a parameter derived from bioimpedance analysis (BIA), provides data on cellular health, membrane integrity, and cellular function. This study aimed to evaluate the relationship between SO and PhA among older adults with type 2 diabetes mellitus (DM). METHODS We performed a cross-sectional study in a tertiary hospital, and all participants underwent a comprehensive geriatric assessment, the hand-grip strength test (HGST), the chair stand test (CST) for muscle strength evaluation, the 4-meter walking test, and the timed up-and-go (TUG) test for physical performance assessment. The diagnosis of SO was made according to the ESPEN/EASO criteria. The PhA was determined automatically by the BIA using resistance and reactance at 50 kHz for each participant. RESULTS A total of 322 participants were included in the study. The mean age of the participants was 72.5 ±5.8, and 203 (63%) of them were female; 63 (19.6%) of them were sarcopenic obese. In multivariable logistic regression analyses, a significant relationship was found when the model was adjusted for age, female gender, MNA-sf scores, HbA1c level, and CCI scores (OR: 0.53, 95%CI: 0.29-0.98, P = 0.04). In ROC analyses, for PhA in predicting SO diagnosis, the AUC was 0.586 (95%CI: 0.505-0.678, P = 0.033). At the cut-off score 4.4, sensitivity was 57.1% and specificity was 61.4%; positive predictive value (PPV) was 26.5%; negative predictive value (NPV) was 85.5%. CONCLUSIONS The study identified a significant relationship between SO and PhA among older adults with type 2 DM. However, larger prospective studies are needed to confirm the potential utility of PhA as a biomarker for SO.
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Affiliation(s)
- Merve Hafızoğlu
- Division of Geriatrics, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey.
| | - Hatice Kübra Yıldırım
- Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Yelda Öztürk
- Division of Geriatrics, Department of Internal Medicine, Eskişehir City Hospital, Eskişehir
| | - Zeynep Şahiner
- Division of Geriatrics, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Didem Karaduman
- Division of Geriatrics, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Cansu Atbaş
- Division of Geriatrics, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Burcu Balam Doğu
- Division of Geriatrics, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Meltem Gülhan Halil
- Division of Geriatrics, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Mustafa Cankurtaran
- Division of Geriatrics, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Cafer Balcı
- Division of Geriatrics, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
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Güner M, Girgin S, Yıldırım T, Okyar Baş A, Ceylan S, Öztürk Y, Koca M, Balcı C, Doğu BB, Cankurtaran M, Halil MG. Decreased abdominal wall muscle mass defined by muscle ultrasound is associated with malnutrition according to Global Leadership Initiative on Malnutrition criteria in renal transplant recipients: A cross-sectional study. JPEN J Parenter Enteral Nutr 2024; 48:329-336. [PMID: 38367017 DOI: 10.1002/jpen.2608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 01/26/2024] [Accepted: 01/26/2024] [Indexed: 02/19/2024]
Abstract
BACKGROUND Changed body composition with increased fat content and decreased muscle mass is seen in renal transplantation recipients (RTRs). Increased fat mass might mask underlying muscle mass loss; measuring low body mass index and weight reduction alone may not be sensitive enough to diagnose malnutrition in RTRs. We aimed to determine the prevalence of malnutrition in stable RTRs using the Global Leadership Initiative on Malnutrition (GLIM) criteria and to assess the use of muscle ultrasonography (US) to compare the performance of various muscle US measurements in the diagnosis of reduced muscle mass. METHODS Ninety-one patients who had renal transplantation >6 months ago were enrolled in the study. GLIM criteria were performed for all patients, but not those at risk of malnutrition. Bioelectrical impedance analysis and muscle US were performed to identify reduced muscle mass. RESULTS The prevalence of malnutrition according to GLIM criteria was 25.3% (n = 23). All muscle US measurements were lower in the malnourished group than the well-nourished group; however, the malnourished group had substantially lower muscle thicknesses in abdominal muscles, specifically the external oblique (EO) and internal oblique (IO) muscles, than the well-nourished group (P = 0.001 and P = 0.007, respectively). There was a significant association between malnutrition and EO (odds ratio [OR] = 0.338, 95% CI = 0.163-0.699; P = 0.003) and IO (OR = 0.620, 95% CI = 0.427-0.900; P = 0.012) regardless of age and sex. CONCLUSION One in four RTRs experience malnutrition. Muscle US could be used effectively for the diagnosis of reduced muscle mass and malnutrition in RTRs according to GLIM criteria.
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Affiliation(s)
- Merve Güner
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Sinem Girgin
- Division of Nephrology, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Tolga Yıldırım
- Division of Nephrology, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Arzu Okyar Baş
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Serdar Ceylan
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Yelda Öztürk
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Meltem Koca
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Cafer Balcı
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Burcu Balam Doğu
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Mustafa Cankurtaran
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Meltem Gülhan Halil
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
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Hafızoğlu M, Odacı Cömertoğlu E, Öztürk Y, Kahyaoğlu Z, Çavuşoglu Ç, Balcı C, Halil MG, Erden Aki Ö, Cankurtaran M, Doğu BB. Which comorbidity index is more appropriate for geriatric patients from the frailty perspective? Eur Geriatr Med 2024; 15:115-125. [PMID: 37607996 DOI: 10.1007/s41999-023-00851-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 08/01/2023] [Indexed: 08/24/2023]
Abstract
OBJECTIVES This study examined the relationship between comorbidity indices and physical, psychologic and social frailty and 1-year mortality. METHODS A cross-sectional analysis was conducted with 136 community-dwelling older adults. The relationship of 4 comorbidity indices (CIRS-G, ACCI, GIC, ICED) with 3 different frailty scales (FRAIL, CFS, TFI) was examined. RESULTS The participants' median age was 72 years (65-90); 62% of the participants were female. Overall, 15.4% of the participants were living with frailty according to the FRAIL scale, 27.9% of them according to the CFS, 58.8% of them according to the TFI, 47.7% of them living with psychological frailty, and 28.6% of them living with social frailty. There were significant and moderate correlations between CIRS-G and FRAIL, CFS and TFI total scores, TFI-Psychological scores and TFI-Social scores (respectively; p < 0.001, r = 0.530; p < 0.001, r = 0.471; p < 0.001, r = 0.535; p < 0.001, r = 0.402; p = 0.016 r = 0.206). AUC for CIRS-G was calculated as 0.716 among comorbidity indices in predicting the presence of frailty according to the FRAIL scale (p = 0.002, 95%CI [0.60-0.82]), 0.765 according to the CFS (p < 0.001, 95%CI [0.66-0.86]), 0.746 according to the TFI (p < 0.001, 95%CI [0.66-0.82]). CONCLUSION The CIRS-G index was found to be superior to other indices in predicting the presence of frailty of comorbidity indices, and only GIC scores showed significant results in predicting mortality. However, it would not be the right approach to recommend a single comorbidity index when evaluating older adults.
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Affiliation(s)
- Merve Hafızoğlu
- Department of Internal Medicine, Division of Geriatrics Medicine, Faculty of Medicine, Hacettepe University Medical School, Altındag, Ankara, Turkey.
| | - Ezgi Odacı Cömertoğlu
- Department of Internal Medicine, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Yelda Öztürk
- Department of Geriatrics, Eskisehir City Hospital, Health Sciences University, Eskisehir, Turkey
| | - Zeynep Kahyaoğlu
- Department of Internal Medicine, Division of Geriatrics Medicine, Faculty of Medicine, Hacettepe University Medical School, Altındag, Ankara, Turkey
| | - Çağatay Çavuşoglu
- Department of Geriatrics Mehmet, Akif Inan Training and Research Hospital, Health Sciences University, Sanliurfa, Turkey
| | - Cafer Balcı
- Department of Internal Medicine, Division of Geriatrics Medicine, Faculty of Medicine, Hacettepe University Medical School, Altındag, Ankara, Turkey
| | - Meltem Gülhan Halil
- Department of Internal Medicine, Division of Geriatrics Medicine, Faculty of Medicine, Hacettepe University Medical School, Altındag, Ankara, Turkey
| | - Özlem Erden Aki
- Departments of Psychiatry, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Mustafa Cankurtaran
- Department of Internal Medicine, Division of Geriatrics Medicine, Faculty of Medicine, Hacettepe University Medical School, Altındag, Ankara, Turkey
| | - Burcu Balam Doğu
- Department of Internal Medicine, Division of Geriatrics Medicine, Faculty of Medicine, Hacettepe University Medical School, Altındag, Ankara, Turkey
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Özcan B, Güner M, Ceylan S, Öztürk Y, Girgin S, Okyar Baş A, Koca M, Balcı C, Doğu BB, Cankurtaran M, Yıldırım T, Halil MG. Calf circumference predicts sarcopenia in maintenance hemodialysis. Nutr Clin Pract 2024; 39:193-201. [PMID: 37933421 DOI: 10.1002/ncp.11089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 09/28/2023] [Accepted: 10/07/2023] [Indexed: 11/08/2023] Open
Abstract
BACKGROUND Early recognition of sarcopenia in hemodialysis (HD) patients will be of great importance in preventing adverse outcomes and improving the quality of life in these patients. The main goal of this study was to evaluate the diagnostic accuracy of calf circumference (CC) measurement in detecting sarcopenia among CKD patients undergoing maintenance HD. METHODS This cross-sectional study included 52 patients (53 ± 17 years) who were currently in a maintenance HD. Muscle strength was evaluated using handgrip strength, and smooth muscle mass index (SMI) was assessed through bioelectrical impedance analysis, and CC was measured at the widest part of the calf with the foot pressed against a hard surface. RESULTS Out of the total patient population, sarcopenia was identified in 32.7% (n = 17). The two groups were comparable in terms of age, weight, and height, but the median body mass index of sarcopenic group was statistically lower than nonsarcopenic group (21.6 kg/m2 [18.9-24.6] vs 24.7 kg/m2 [21.4-27.3]. The sarcopenic group had a substantially smaller CC than the nonsarcopenic group (30.0 cm [26.5-32.0] vs 31.5 cm [30.3-34.8], P = 0.013; respectively). In the regression analysis, CC was found to be independently associated with post-HD SMI (P < 0.001; odds ratio, 1.938; and 95% CI, 1.020-2.856). CC was positively but weakly correlated with handgrip strength, however strong and significant correlation was found between CC and SMI (r = 0.277, P = 0.047 and r = 0.733, P < 0.001; respectively). A CC of 31 cm or less predicted confirmed sarcopenia in HD patients (area under the curve = 0.709, P = 0.006, specificity = 0.556, sensitivity = 0.765). CONCLUSIONS Low muscle mass and potentially low muscle strength in HD patients can be accurately identified through the use of CC measurements. Specifically, a CC measurement below 31 cm has found to be a useful indicator to identify individuals on maintenance HD.
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Affiliation(s)
- Berşan Özcan
- Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Merve Güner
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Serdar Ceylan
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Yelda Öztürk
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Sinem Girgin
- Department of Internal Medicine, Division of Nephrology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Arzu Okyar Baş
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Meltem Koca
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Cafer Balcı
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Burcu Balam Doğu
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Mustafa Cankurtaran
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Tolga Yıldırım
- Department of Internal Medicine, Division of Nephrology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Meltem Gülhan Halil
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
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Okyar Baş A, Yardımcı GK, Güner Oytun M, Ceylan S, Kahyaoğlu Z, Öztürk Y, Çöteli S, Halil MG, Cankurtaran M, Kılıç L, Doğu Yavuz BB. Cognitive Status is Better in Older Adults under Colchicine Treatment: A Case-Control Study. Exp Aging Res 2024; 50:17-27. [PMID: 36373385 DOI: 10.1080/0361073x.2022.2145164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 11/04/2022] [Indexed: 11/16/2022]
Abstract
PURPOSE We aimed to investigate the effects of colchicine, an important anti-inflammatory agent, on cognitive functions in a geriatric population diagnosed with gout or osteoarthritis by comparing it to non-colchicine users. METHODS 138 geriatric patients (67 colchicine users and 71 non-users) were enrolled. Within comprehensive geriatric assessment (CGA), cognitive status assessment via Mini-Mental State Examination test (MMSE), Quick Mild Cognitive Impairment Screening test (Qmci), clock drowning test (CDT), and digit span tests were performed. RESULTS Median age was 68 (65-72), and there were 82 female (59.4%) patients. The scores of CDT, Backward Digit Span Test, MMSE-Total, MMSE-Attention, MMSE-Motor Function, Qmci-Total Score, Qmci-Clock drawing, and Qmci-Logical Memory were significantly higher in the colchicine user group (p < .005), showing better cognitive function. Adjusted model analysis showed that colchicine usage is independently correlated with higher Qmci-Total Score and Qmci-Logical Memory Score (For Qmci total score β = 7.87 95%CI = 5.48-10.27, p = <0.0001, and for Qmci Logical memory score β = 3.52, 95%CI = 2.12-4.91, p = <0.0001). CONCLUSION To the best of our knowledge, this is the first study revealing that colchicine usage is associated with better cognitive performance in older adults. Further investigations with a prospective, larger-sampled and randomized design are needed to show the causal relationship between colchicine and cognition.
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Affiliation(s)
- Arzu Okyar Baş
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Gözde Kübra Yardımcı
- Department of Internal Medicine, Division of Rheumatology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Merve Güner Oytun
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Serdar Ceylan
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Zeynep Kahyaoğlu
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Yelda Öztürk
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Süheyla Çöteli
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Meltem Gülhan Halil
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Mustafa Cankurtaran
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Levent Kılıç
- Department of Internal Medicine, Division of Rheumatology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Burcu Balam Doğu Yavuz
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
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Güner M, Girgin S, Ceylan S, Özcan B, Öztürk Y, Okyar Baş A, Koca M, Balcı C, Doğu BB, Cankurtaran M, Yıldırım T, Halil M. The Role of Muscle Ultrasonography to Diagnose Malnutrition and Sarcopenia in Maintenance Hemodialysis. J Ren Nutr 2023:S1051-2276(23)00228-5. [PMID: 38128851 DOI: 10.1053/j.jrn.2023.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 11/02/2023] [Accepted: 12/03/2023] [Indexed: 12/23/2023] Open
Abstract
BACKGROUND Sarcopenia and malnutrition are commonly seen and fundamental indicators of prognosis and are directly associated with increased mortality in maintenance hemodialysis (MHD) patients. We aimed to reveal the frequency of malnutrition and sarcopenia in patients undergoing MHD and investigate the role of muscle ultrasound (US) parameters to predict sarcopenia and malnutrition. METHODS A total of 45 patients who have undertaken MHD for more than 6 months three times a week were evaluated for the present study. The US measurement was performed on gastrocnemius medialis, rectus femoris (RF), and abdominal muscles, including rectus abdominis, external oblique abdominalis, internal oblique abdominalis, and transversus abdominis. Nutritional status of the participants was assessed by mini-nutritional assessment short-form (MNA-SF). RESULTS The prevalence of probable and confirmed sarcopenia was 51.1% (n = 23) and 35.6% (n = 16), respectively. The malnutrition and risk of malnutrition were observed in 31.1% of the whole study population (n = 14). All muscle US measurements were lower in the sarcopenic group; however, the difference is meaningful only for RF cross-sectional area (CSA) (P = .046). The malnourished group had substantially lower muscle thickness and CSA, except for the gastrocnemius muscle thickness. The value of RFCSA to predict sarcopenia and malnutrition was observed as 4.61 cm2, respectively (P < .05). RFCSA was independently associated with sarcopenia (odds ratio: 0.37; 95% confidence interval: 0.17-0.79; P = .011) and malnutrition (odds ratio: 0.45; 95% confidence interval: 0.23-0.87; P = .017). CONCLUSION RFCSA may be a useful and simple predictor for predicting patients undergoing hemodialysis who are at risk of sarcopenia and malnutrition.
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Affiliation(s)
- Merve Güner
- Division of Geriatrics, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkiye.
| | - Sinem Girgin
- Division of Nephrology, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkiye
| | - Serdar Ceylan
- Division of Geriatrics, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkiye
| | - Berşan Özcan
- Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkiye
| | - Yelda Öztürk
- Division of Geriatrics, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkiye
| | - Arzu Okyar Baş
- Division of Geriatrics, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkiye
| | - Meltem Koca
- Division of Geriatrics, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkiye
| | - Cafer Balcı
- Division of Geriatrics, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkiye
| | - Burcu Balam Doğu
- Division of Geriatrics, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkiye
| | - Mustafa Cankurtaran
- Division of Geriatrics, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkiye
| | - Tolga Yıldırım
- Division of Nephrology, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkiye
| | - Meltem Halil
- Division of Geriatrics, Department of Internal Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkiye
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Güner M, Ceylan S, Okyar Baş A, Kahyaoğlu Z, Çöteli S, Koca M, Öztürk Y, Deniz O, Doğu BB, Halil MG, Cankurtaran M, Balcı C. Phase angle is associated with frailty in community-dwelling older adults. Nutrition 2023; 116:112157. [PMID: 37562186 DOI: 10.1016/j.nut.2023.112157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 06/28/2023] [Accepted: 07/03/2023] [Indexed: 08/12/2023]
Abstract
OBJECTIVES Frailty is a geriatric syndrome associated with adverse outcomes. Malnutrition and sarcopenia are conditions intertwined with frailty. Phase angle (PhA), used to evaluate nutritional status and sarcopenia, shows the cell membrane integrity and is closely related to clinical outcomes and mortality in many chronic conditions. The aim of this study was to evaluate the relationship between PhA and frailty in community-dwelling older adults. METHODS The study included 299 older adults admitted to a geriatric outpatient clinic. A comprehensive geriatric assessment was performed on all participants. Frailty was evaluated via the Clinical Frailty Scale, ≥4 levels were accepted as living with frailty. All participants underwent bioelectrical impedance analysis, and PhA was recorded for each participant. RESULTS The prevalence of frailty among the participants was 53%. The median PhA was lower in patients living with frailty than in those who were robust (5.10 [4.55-7.80] and 5.90 [3.90-6.90] degrees, respectively, and P = 0.014). Multivariable regression analysis showed that PhA was also associated with frailty in both sexes (odds ratio [OR], 0.920; P = 0.034 for men; OR, 0.81; P = 0.005 for women, respectively) independent of age, handgrip strength, nutritional status, body mass index, living alone, and burden of morbidities. CONCLUSION PhA calculated with bioelectrical impedance analysis was significantly associated with frailty. Further research with large samples is needed to determine whether PhA demonstrates potential utility as a biomarker for frailty.
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Affiliation(s)
- Merve Güner
- Hacettepe University Faculty of Medicine, Division of Geriatric Medicine, Ankara Turkey.
| | - Serdar Ceylan
- Hacettepe University Faculty of Medicine, Division of Geriatric Medicine, Ankara Turkey
| | - Arzu Okyar Baş
- Hacettepe University Faculty of Medicine, Division of Geriatric Medicine, Ankara Turkey
| | - Zeynep Kahyaoğlu
- Hacettepe University Faculty of Medicine, Division of Geriatric Medicine, Ankara Turkey
| | - Süheyla Çöteli
- Hacettepe University Faculty of Medicine, Division of Geriatric Medicine, Ankara Turkey
| | - Meltem Koca
- Hacettepe University Faculty of Medicine, Division of Geriatric Medicine, Ankara Turkey
| | - Yelda Öztürk
- Hacettepe University Faculty of Medicine, Division of Geriatric Medicine, Ankara Turkey
| | - Olgun Deniz
- Hacettepe University Faculty of Medicine, Division of Geriatric Medicine, Ankara Turkey
| | - Burcu Balam Doğu
- Hacettepe University Faculty of Medicine, Division of Geriatric Medicine, Ankara Turkey
| | - Meltem Gülhan Halil
- Hacettepe University Faculty of Medicine, Division of Geriatric Medicine, Ankara Turkey
| | - Mustafa Cankurtaran
- Hacettepe University Faculty of Medicine, Division of Geriatric Medicine, Ankara Turkey
| | - Cafer Balcı
- Hacettepe University Faculty of Medicine, Division of Geriatric Medicine, Ankara Turkey
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Baş H, Okyar Baş A, Ceylan S, Güner M, Koca M, Hafızoğlu M, Şahiner Z, Öztürk Y, Balcı C, Doğu BB, Cankurtaran M, Halil MG. Lower gastrocnemius muscle stiffness, derived from elastography, is an independent factor for falls in older adults. Aging Clin Exp Res 2023; 35:2979-2986. [PMID: 37907664 DOI: 10.1007/s40520-023-02605-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 10/20/2023] [Indexed: 11/02/2023]
Abstract
BACKGROUND AND AIMS It is well known that components of sarcopenia (i.e., decreased muscle strength and mass) are related to falls in older adults. However, the possible effects of changes in muscle quality on falls have not been identified. This study aimed to evaluate the changes in muscle quality reflected by muscle stiffness derived from shear-wave elastography (SWE) and its association with falls in older adults. METHODS A total of 101 geriatric outpatients were included in the study. Assessments of physical performance, muscle strength (handgrip strength), muscle mass (muscle ultrasonography and bioelectrical impedance analysis), and muscle stiffness of the medial head of gastrocnemius (GCM) in relaxation and passive stretching were performed. The history of falls in the previous year was questioned and recorded. RESULTS The median (25-75 percentiles) age of participants was 73 (69-77) years, and 66.3% (n = 67) were female. According to fall history, participants were divided into non-fallers and fallers groups, and 72 (71.3%) and 29 (28.7%) participants were in each group, respectively. The median muscle stiffness of (Emean) the GCM in passive stretching was significantly lower in the fallers group (p < 0.001), and it was significantly correlated with the number of falls in the previous year (r: - 0.274, p: 0.010). In regression analyses, the Emean value of GCM in passive stretching was significantly associated with falls independent of confounders (OR: 0.944, 95% CI 0.90-0.98, p = 0.010). DISCUSSION AND CONCLUSION This is the first study to reveal the relationship between falls and SWE-defined lower GCM stiffness independently of muscle mass and strength.
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Affiliation(s)
- Hakan Baş
- Department of Radiology, Ankara Gazi Mustafa Kemal Occupational and Environmental Diseases Hospital, Yenimahalle, Ankara, Turkey.
| | - Arzu Okyar Baş
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University, Ankara, Turkey
| | - Serdar Ceylan
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University, Ankara, Turkey
| | - Merve Güner
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University, Ankara, Turkey
| | - Meltem Koca
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University, Ankara, Turkey
| | - Merve Hafızoğlu
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University, Ankara, Turkey
| | - Zeynep Şahiner
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University, Ankara, Turkey
| | - Yelda Öztürk
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University, Ankara, Turkey
| | - Cafer Balcı
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University, Ankara, Turkey
| | - Burcu Balam Doğu
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University, Ankara, Turkey
| | - Mustafa Cankurtaran
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University, Ankara, Turkey
| | - Meltem Gülhan Halil
- Division of Geriatric Medicine, Department of Internal Medicine, Hacettepe University, Ankara, Turkey
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Oytun MG, Girgin S, Yıldırım T, Baş AO, Ceylan S, Öztürk Y, Koca M, Balcı C, Doğu B, Cankurtaran M, Halil M. Malnutrition Defined By Glim Criteria In Renal Transplant Recipients. Clin Nutr ESPEN 2023. [DOI: 10.1016/j.clnesp.2022.09.299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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10
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Okyar Baş A, Baş H, Ceylan S, Güner Oytun M, Koca M, Hafızoğlu M, Şahiner Z, Öztürk Y, Balcı C, Doğu B, Cankurtaran M, Halil M. Changes In Muscle Quality Identified By Shear-Wave Elastography And Association With Sarcopenia Parameters. Clin Nutr ESPEN 2023. [DOI: 10.1016/j.clnesp.2022.09.078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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11
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Okyar Baş A, Güner Oytun M, Öztürk Y, Ceylan S, Koca M, Atbaş C, Karaduman D, Balcı C, Doğu B, Cankurtaran M, Halil M. Osteoporosis Is Associated With Low Muscle Mass Defined By Muscle Ultrasonography. Clin Nutr ESPEN 2023. [DOI: 10.1016/j.clnesp.2022.09.077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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12
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Kaya ZI, Öztürk Y, Gürcü S, Uncu G, Uçan A, Eşme M, Kaya BY, Balci C. Predictors of 3-month mortality with muscle ultrasound and palliative prognostic tools among patients admitted to palliative care units. Korean J Intern Med 2023:kjim.2022.308. [PMID: 36997319 DOI: 10.3904/kjim.2022.308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 12/21/2022] [Indexed: 04/01/2023] Open
Abstract
BACKGROUND/AIMS Prognostic factors are an important issue in progressive and life-limiting diseases. This study evaluate 3-month mortality in patients admitted to the palliative care unit (PCU). METHODS In this study, the patient's demographics, comorbidities, nutritional status, and laboratory values were recorded. The palliative performance scale (PPS), the palliative prognostic index (PPI), and the palliative prognostic (PaP) score were calculated. The rectus femoris (RF) cross-sectional area (CSA), RF muscle thickness, gastrocnemius (GC) medialis muscle thickness, pennation angle and fascicle length of the GC were measured by ultrasound for survival prediction. RESULTS A total of 88 patients enrolled during the study period, with a mean age of 73.6 ± 13.3 years and a 3-month mortality rate of 59.1%. The findings of a multivariable Cox proportional hazards regression model based on age, gender, C-reactive protein level and Nutrition Risk Screening 2002 scores as covariates revealed the PPI and the PaP score to be significant predictors of 3-month mortality. In addition, in the unadjusted Cox proportional hazard regression analysis, the CSA of the RF muscle was also found to be a significant predictor of 3-month mortality. CONCLUSIONS Findings revealed that the combined use of the CSA of the RF, the PPI, and the PaP score are reliable predictors of mortality in patients admitted to the PCU.
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Affiliation(s)
- Zeynep Irmak Kaya
- Department of Internal Medicine, Eskisehir City Hospital, Eskisehir, Turkey
| | - Yelda Öztürk
- Department of Geriatric Medicine, Eskisehir City Hospital, Eskisehir, Turkey
| | - Sinem Gürcü
- Department of Pharmacy, Eskisehir City Hospital, Eskisehir, Turkey
| | - Gülgün Uncu
- Department of Neurology, Eskisehir City Hospital, Eskisehir, Turkey
| | - Anıl Uçan
- Department of Internal Medicine, Eskisehir City Hospital, Eskisehir, Turkey
| | - Mert Eşme
- Department of Geriatric Medicine, Mersin City Hospital, Mersin, Turkey
| | | | - Cafer Balci
- Division of Geriatric Medicine, Hacettepe University Faculty of Medicine, Ankara, Turkey
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Okyar Baş A, Baş H, Ceylan S, Güner Oytun M, Koca M, Hafızoğlu M, Şahiner Z, Öztürk Y, Balcı C, Doğu BB, Cankurtaran M, Halil MG. Changes in muscle quality identified by shear-wave elastography and association with sarcopenia. JPEN J Parenter Enteral Nutr 2023; 47:253-264. [PMID: 36227071 DOI: 10.1002/jpen.2457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 09/19/2022] [Accepted: 10/11/2022] [Indexed: 11/08/2022]
Abstract
BACKGROUND AND AIMS This study aimed to investigate the potential role of shear-wave elastography (SWE) in evaluating muscle quality and assess its association with muscle strength and mass. METHODS A total of 129 patients aged 18-87 years were included. Patients aged >65 years underwent comprehensive geriatric assessment. Anthropometric measurements, assessment of physical performance, muscle strength (handgrip strength [HGS]), muscle mass (B-mode muscle ultrasonography), and muscle quality (identified via SWE) were performed for all patients. RESULTS The median (interquartile range) age of participants was 69 (59-76) years and 62% (n = 80) were female. According to HGS, patients were divided into normal and low HGS groups, and there were 85 (65.9%) and 44 (34.1%) patients in each group, respectively. The median average value of SWE measurement (Vmean ) of the rectus femoris (RF) in passive stretching was significantly lower in the low HGS group. In regression analyses, Vmean was significantly associated with HGS independently of age, sex, and body mass index. Optimal cutoff values of the Vmean value (m/s) of RF in passive stretching for predicting low HGS were ≤2.62 for male (area under the curve [AUC], 0.882; 95% CI, 0.705-0.938; P = <0.0001), and ≤2.52 for female (AUC, 0.719; 95% CI, 0.605-0.833; P = 0.002). CONCLUSION To the best of our knowledge, this is the first study revealing SWE is a good predictor of muscle strength, and it could be a useful tool for evaluating muscle quality in clinical practice. Further randomized controlled studies are needed to confirm the presented cutoff values.
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Affiliation(s)
- Arzu Okyar Baş
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Medical School, Ankara, Turkey
| | - Hakan Baş
- Department of Radiology, Ankara Gazi Mustafa Kemal Occupational and Environmental Diseases Hospital, Ankara, Turkey
| | - Serdar Ceylan
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Medical School, Ankara, Turkey
| | - Merve Güner Oytun
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Medical School, Ankara, Turkey
| | - Meltem Koca
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Medical School, Ankara, Turkey
| | - Merve Hafızoğlu
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Medical School, Ankara, Turkey
| | - Zeynep Şahiner
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Medical School, Ankara, Turkey
| | - Yelda Öztürk
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Medical School, Ankara, Turkey
| | - Cafer Balcı
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Medical School, Ankara, Turkey
| | - Burcu Balam Doğu
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Medical School, Ankara, Turkey
| | - Mustafa Cankurtaran
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Medical School, Ankara, Turkey
| | - Meltem Gülhan Halil
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Medical School, Ankara, Turkey
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Okyar Baş A, Güner Oytun M, Ceylan S, Öztürk Y, Kahyaoğlu Z, Çavuşoğlu Ç, Balcı C, Halil MG, Cankurtaran M, Doğu BB. Cognitive assessment in the time of pandemics: mandatory surgical face mask usage affects cognitive test performance of older adults. Psychogeriatrics 2022; 22:786-794. [PMID: 36319269 DOI: 10.1111/psyg.12883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 06/27/2022] [Accepted: 07/22/2022] [Indexed: 11/27/2022]
Abstract
BACKGROUND The most important disadvantage of surgical mask usage is that it can aversely affect communication. This study aimed to evaluate the possible effects of face masks on the cognitive test performance of older adults. METHODS A total of 198 geriatric patients were enrolled after applying the exclusion criteria. Within the comprehensive geriatric assessment (CGA), cognitive status assessment was performed with the Mini-Mental State Examination test (MMSE) and Quick Mild Cognitive Impairment Screening test (Q-MCI) tests. RESULTS The median age was 70 (66-77) years, and there were 119 female (60.7%) patients. Patients were divided into normal cognitive status (NC), mild cognitive impairment (MCI), and probable Alzheimer's disease (AD) groups. There were 129 (65.2%), 30 (15.2%), and 37 (18.7%) patients in each group, respectively. For differentiating MCI from NC, calculated optimal cut-offs for the Q-MCI and MMSE total scores were ≤50 (sensitivity 83.3%, specificity 90.7%) and ≤26 (sensitivity 63.3%, specificity 87.5%), respectively. For differentiating AD from MCI, calculated optimal cut-offs for the Q-MCI and MMSE total scores were ≤28 (sensitivity 76.8%, specificity 86.7%), and ≤24 (sensitivity 94.4%, specificity 64.5%), respectively. CONCLUSION Our results revealed that screening tests are still sensitive in discriminating cognitive disorders although cut-offs are lower with mask usage than for previously validated cut-offs. This is the first study revealing the impact of surgical mask usage on cognitive test performance, indicating that cut-offs validated before the pandemic may cause overdiagnosing of cognitive disorders since the previous cut-offs are not validated for mask usage. Large sample studies are needed to determine new cut-offs validated with mask usage.
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Affiliation(s)
- Arzu Okyar Baş
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Merve Güner Oytun
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Serdar Ceylan
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Yelda Öztürk
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Zeynep Kahyaoğlu
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Çağatay Çavuşoğlu
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Cafer Balcı
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Meltem Gülhan Halil
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Mustafa Cankurtaran
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Burcu Balam Doğu
- Department of Internal Medicine, Division of Geriatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
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Koca M, Öztürk Y, Boğa İ, Bürkük S, Eşme M, Akyürek Y, Şimşek S, Aydın DD, Çiçek F, Karabulut E, Halil M, Cankurtaran M, Tanrıöver MD, Doğu BB. A Quality Improvement Study on Delirium Awareness Day: In Pursuit of Missed Delirium Diagnoses. J Gerontol Nurs 2022; 48:43-51. [PMID: 35914081 DOI: 10.3928/00989134-20220630-03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The current study aimed to screen for delirium in hospitalized older adults and assess the validity of the Turkish version of the 4A's Test (4AT-TR) as a feasible tool to integrate in routine patient care. The point prevalence of delirium according to clinical evaluation in routine practice was detected among all patients aged ≥60 years in 12 pilot wards. Delirium screening was then conducted by two arms: (a) nurses using the 4AT-TR and (b) geriatricians according to Diagnostic and Statistical Manual of Mental Disorders, 5th edition (DSM-5) criteria. Prevalence of delirium according to clinical impression was 3.3% (n = 4), whereas prevalence was 12.4% (n = 17) according to DSM-5 criteria and 13.8% (n = 17) according to the 4AT-TR. The 4AT-TR performed by nurses had a sensitivity of 66.6% and specificity of 93.5%. Area under the receiver operating characteristic curve for delirium diagnosis was 0.819 (p < 0.001). Most delirium cases remain undetected unless a routine and formal delirium assessment is integrated in hospital care of high-risk patients. The 4AT-TR performed by nurses seems to be a valid tool for determining delirium in hospitalized older adults. [Journal of Gerontological Nursing, 48(8), 43-51.].
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Unsal P, Güven G, Dikmeer A, Öztürk Y, Bürkük S, Akçay K, Ölmez N, Tamer F, Ataç S, Halaçlı B, İskit AT, Halil M. At which department and when have we reached the target in nutrition therapy? Clin Nutr ESPEN 2021. [DOI: 10.1016/j.clnesp.2021.09.156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Dedebali C, Çelik S, Şeker G, Öztürk Y. Effects of the extensively hydrolyzed protein and amino acid-based formulas on growth parameters in children with chronic diseases. Clin Nutr ESPEN 2021. [DOI: 10.1016/j.clnesp.2021.09.407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Abstract
ABSTRACT The aim of this study was to identify non-genetic parameters affecting the milk yield traits of Simmental cows raised in subtropical climate conditions. Records on 1904 lactation events of Simmental cows (N=706) during 2001-2014 were included in this study. A generalized linear model was used to investigate the effect of non-genetic factors (calving year, season, and age; lactation number; birth type; and calf sex) on real milk yield (MY), adjusted 305-d lactation milk yield (305-d MY), adjusted mature-age 305-d lactation milk yield (305-d MAMY), lactation length (LL), and dry periods (DP). The MY, 305-d MY, 305-d MAMY, LL, and DP were 6413.04kg, 6060.30kg, 6871.21 kg, 329.88d, and 57.67d, respectively, in Simmental cows. The effects of calving year, birth type, and calf sex on MY were significant (P<0.05). Calving year, calving age, birth type, and calf sex had significant effects on 305-d MY (P<0.05). The 305-d MAMY was significantly affected by calving year, birth type, and calf sex (P<0.05). In conclusion, based on the findings of the present study, the milk yield traits of Simmental cows raised at subtropical climate conditions with ideal feeding and management strategies was in accordance with world standards.
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Affiliation(s)
| | - Y. Öztürk
- Mehmet Akif Ersoy University, Turkey
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19
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Aksoy B, Kuyum Töz P, Öztürk Y. MON-P273: Feeding Practice in Children with Acute Pancreatitis in Turkey. Clin Nutr 2017. [DOI: 10.1016/s0261-5614(17)30816-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Öztürk Y, Aktaş B. Note: 3D printed spheroid for uniform magnetic field generation. Rev Sci Instrum 2016; 87:106103. [PMID: 27802690 DOI: 10.1063/1.4965035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This article is focused on a novel and practical production method for a uniform magnetic field generator. The method involves building of a surface coil template using a desktop 3D printer and winding of a conducting wire onto the structure using surface grooves as a guide. Groove pattern was based on the parametric spheroidal helical coil formula. The coil was driven by a current source and the magnetic field inside was measured using a Hall probe placed into the holes on the printed structure. The measurements are found to be in good agreement with our finite element analysis results and indicate a fairly uniform field inside.
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Affiliation(s)
- Y Öztürk
- TÜBITAK BILGEM, Gebze Yerleşkesi, 41470 Kocaeli, Turkey
| | - B Aktaş
- Physics Department, Gebze Technical University (GTU), 41400 Kocaeli, Turkey
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Ulca P, Öztürk Y, Senyuva HZ. Survey of sulfites in wine and various Turkish food and food products intended for export, 2007-2010. Food Addit Contam Part B Surveill 2015; 4:226-30. [PMID: 24786011 DOI: 10.1080/19393210.2011.615028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Surveys were carried out between 2007 and 2010 to determine the total levels of sulfites in 1245 samples of wines, dried apricots, dried vegetables, nuts, juices and purees, frozen foods and cereals containing dried fruit supplied by food inspectors and by food producers for testing or for export certification. Sulfite analysis of wine was carried out using the Ripper method with an LOQ of 5 mg l(-1) and for dried and other foods the Monier-Williams distillation procedure was employed with an LOQ of 10 mg kg(-1). In the survey all wines contained measurable sulfites, but with the exception of one sample of white wine they were otherwise below Turkish Food Codex limits of 160 mg kg(-1) for red wine, 210 mg kg(-1) to white wine and 235 mg kg(-1) for sparkling wine. None of the cereal products, frozen foods, juices or purees contained sulfites above 10 mg kg(-1). However, all dried apricot samples contained significant levels of sulfite with around 40% having levels exceeding the Turkish limit of 2000 mg kg(-1). Significant levels of sulfite were found in other samples of dried fruit with even a fruit and nut bar containing 1395 mg kg(-1) of sulfite, suggesting the dried fruit ingredients contained levels above regulatory limits.
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Affiliation(s)
- P Ulca
- a A&T Food Laboratory , Mega Center No 29 34045 , Istanbul , Turkey
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Öztürk Y, Tabur MA. Seasonal and Daily Activity Pattern in Griffon Vulture in Sütçüler (Isparta-Turkey). BIOTECHNOL BIOTEC EQ 2010. [DOI: 10.1080/13102818.2010.10817918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Öztürk Y, Avgin I, Erol M, Çelik E. Cerium-Doped Yttrium Iron Garnet Thin Films Prepared by Sol-Gel Process: Synthesis, Characterization, and Magnetic Properties. Springer Proceedings in Physics 2009. [DOI: 10.1007/978-3-540-69882-1_6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Sagratini G, Ricciutelli M, Vittori S, Öztürk N, Öztürk Y, Maggi F. Phytochemical and antioxidant analysis of eight Hypericum taxa from Central Italy. Fitoterapia 2008; 79:210-3. [DOI: 10.1016/j.fitote.2007.11.011] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2007] [Accepted: 11/18/2007] [Indexed: 10/22/2022]
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Kavukçu S, Türkmen M, Soylu A, Kasap B, Öztürk Y, Karademir S, Bora S, Astarcıoğlu İ, Gülay H. Combined Liver-Kidney Transplantation and Follow-Up in Primary Hyperoxaluria Treatment: Report of Three Cases. Transplant Proc 2008; 40:316-9. [PMID: 18261616 DOI: 10.1016/j.transproceed.2007.11.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Öztürk Y, Masirli H, Erdoǧan N, Tunali F, Erenoǧlu N. 3-07-37 Carotid artery stenosis in ischaemic strokes. J Neurol Sci 1997. [DOI: 10.1016/s0022-510x(97)85578-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Öztürk Y, Aydin S, Arslan R, Baser KHC, Kurtar-Öztürk N. Thyroid hormone enhancing activity of the fruits ofJuglans regia L. in mice. Phytother Res 1994. [DOI: 10.1002/ptr.2650080512] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Aydin S, Öztürk Y, Başer KHC, Kirimer N, Kurtar-Öztürk N. Effects ofAlcea pallida L. (A.) andTilia argentea Desf. ex DC infusions on swimming performance in mice. Phytother Res 1992. [DOI: 10.1002/ptr.2650060411] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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29
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Öztürk Y, Aydin S, Başer KHC, Kirimer N, Kurtar-Öztürk N. Hepatoprotective activity ofHypericum perforatum L. alcoholic extract in rodents. Phytother Res 1992. [DOI: 10.1002/ptr.2650060111] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Öztürk Y, Özçelikay A, Yildizoĝlu-Ari N, Altan V, Altinkurt O. Effect of diabetes on histamine-induced gastric acid secretion in the rat. Eur J Pharmacol 1990. [DOI: 10.1016/0014-2999(90)93604-o] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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