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1.
Clin Nucl Med ; 49(5): 462-463, 2024 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-38466017

RESUMO

ABSTRACT: A 57-year-old man presented with odynophagia for 1 week was referred for FDG PET/CT scan to rule out recurrent hypopharyngeal cancer. The FDG PET/CT showed hypermetabolic lesions in hypopharyngeal area and adjacent cervical spine with pneumorrhachis, the presence of intraspinal air, on attenuation CT images, which might indicate a life-threatening infection. An emergency MRI confirmed the presence of cervical spondylodiscitis with an epidural abscess. The patient rapidly progressed to quadriplegia and difficulty voiding on the same day as the PET/CT scan, leading to emergent operation. The patient received antibiotics treatment and discharged 4 months later without evidence of cancer recurrence.


Assuntos
Neoplasias Hipofaríngeas , Pneumorraque , Masculino , Humanos , Pessoa de Meia-Idade , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada/métodos , Fluordesoxiglucose F18 , Tomografia Computadorizada por Raios X/métodos , Recidiva Local de Neoplasia/diagnóstico por imagem , Tomografia por Emissão de Pósitrons/métodos
2.
Sci Rep ; 7(1): 9102, 2017 08 22.
Artigo em Inglês | MEDLINE | ID: mdl-28831095

RESUMO

The aim of this study was to evaluate leg-to-leg bioelectrical impedance analysis (LBIA) using a four-contact electrode system for measuring abdominal visceral fat area (VFA). The present study recruited 381 (240 male and 141 female) Chinese participants to compare VFA measurements estimated by a standing LBIA system (VFALBIA) with computerized tomography (CT) scanned at the L4-L5 vertebrae (VFACT). The total mean body mass index (BMI) was 24.7 ± 4.2 kg/m2. Correlation analysis, regression analysis, Bland-Altman plot, and paired sample t-tests were used to analyze the accuracy of the VFALBIA. For the total subjects, the regression line was VFALBIA = 0.698 VFACT + 29.521, (correlation coefficient (r) = 0.789, standard estimate of error (SEE) = 24.470 cm2, p < 0.001), Lin's correlation coefficient (CCC) was 0.785; and the limit of agreement (LOA; mean difference ±2 standard deviation) ranged from -43.950 to 67.951 cm2, LOA% (given as a percentage of mean value measured by the CT) was 48.2%. VFALBIA and VFACT showed significant difference (p < 0.001). Collectively, the current study indicates that LBIA has limited potential to accurately estimate visceral fat in a clinical setting.


Assuntos
Impedância Elétrica , Gordura Intra-Abdominal/diagnóstico por imagem , Tomografia Computadorizada por Raios X/métodos , Adulto , Idoso , Idoso de 80 Anos ou mais , Composição Corporal , Índice de Massa Corporal , China , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem
3.
Nutrients ; 8(10)2016 Oct 21.
Artigo em Inglês | MEDLINE | ID: mdl-27775642

RESUMO

This study aimed to establish a hand-to-hand (HH) model for bioelectrical impedance analysis (BIA) fat free mass (FFM) estimation by comparing with a standing position hand-to-foot (HF) BIA model and dual energy X-ray absorptiometry (DXA); we also verified the reliability of the newly developed model. A total of 704 healthy Chinese individuals (403 men and 301 women) participated. FFM (FFMDXA) reference variables were measured using DXA and segmental BIA. Further, regression analysis, Bland-Altman plots, and cross-validation (2/3 participants as the modeling group, 1/3 as the validation group; three turns were repeated for validation grouping) were conducted to compare tests of agreement with FFMDXA reference variables. In male participants, the hand-to-hand BIA model estimation equation was calculated as follows: FFMmHH = 0.537 h²/ZHH - 0.126 year + 0.217 weight + 18.235 (r² = 0.919, standard estimate of error (SEE) = 2.164 kg, n = 269). The mean validated correlation coefficients and limits of agreement (LOAs) of the Bland-Altman analysis of the calculated values for FFMmHH and FFMDXA were 0.958 and -4.369-4.343 kg, respectively, for hand-to-foot BIA model measurements for men; the FFM (FFMmHF) and FFMDXA were 0.958 and -4.356-4.375 kg, respectively. The hand-to-hand BIA model estimating equation for female participants was FFMFHH = 0.615 h²/ZHH - 0.144 year + 0.132 weight + 16.507 (r² = 0.870, SEE = 1.884 kg, n = 201); the three mean validated correlation coefficient and LOA for the hand-to-foot BIA model measurements for female participants (FFMFHH and FFMDXA) were 0.929 and -3.880-3.886 kg, respectively. The FFMHF and FFMDXA were 0.942 and -3.511-3.489 kg, respectively. The results of both hand-to-hand and hand-to-foot BIA models demonstrated similar reliability, and the hand-to-hand BIA models are practical for assessing FFM.


Assuntos
Antropometria/métodos , Composição Corporal/fisiologia , Compartimentos de Líquidos Corporais/fisiologia , Impedância Elétrica , Modelos Biológicos , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Povo Asiático , Compartimentos de Líquidos Corporais/metabolismo , Feminino , , Mãos , Humanos , Masculino , Pessoa de Meia-Idade , Obesidade/metabolismo , Valores de Referência , Fatores Sexuais , Adulto Jovem
4.
PLoS One ; 11(7): e0160105, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27467065

RESUMO

Bioelectrical impedance analysis (BIA) is a common method for assessing body composition in research and clinical trials. BIA is convenient but when compared with other reference methods, the results have been inconclusive. The level of obesity degree in subjects is considered to be an important factor affecting the accuracy of the measurements. A total of 711 participants were recruited in Taiwan and were sub-grouped by gender and levels of adiposity. Regression analysis and Bland-Altman analysis were used to evaluate the agreement of the measured body fat percentage (BF%) between BIA and DXA. The BF% measured by the DXA and BIA methods (Tanita BC-418) were expressed as BF%DXA and BF%BIA8, respectively. A one-way ANOVA was used to test the differences in BF% measurements by gender and levels of adiposity. The estimated BF%BIA8 and BF%DXA in the all subjects, male and female groups were all highly correlated (r = 0.934, 0.901, 0.916, all P< 0.001). The average estimated BF%BIA8 (22.54 ± 9.48%) was significantly lower than the average BF%DXA (26.26 ± 11.18%). The BF%BIA8 was overestimated in the male subgroup (BF%DXA< 15%), compared to BF%DXA by 0.45%, respectively. In the other subgroups, the BF%BIA8 values were all underestimated. Standing BIA estimating body fat percentage in Chinese participants have a high correlation, but underestimated on normal and high obesity degree in both male and female subjects.


Assuntos
Absorciometria de Fóton , Composição Corporal , Impedância Elétrica , Feminino , Humanos , Masculino , Taiwan
5.
Nutr Res ; 35(11): 982-9, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26409342

RESUMO

Bioelectrical impedance analysis (BIA) is commonly used to assess body composition. Cross-mode (left hand to right foot, Z(CR)) BIA presumably uses the longest current path in the human body, which may generate better results when estimating fat-free mass (FFM). We compared the cross-mode with the hand-to-foot mode (right hand to right foot, Z(HF)) using dual-energy x-ray absorptiometry (DXA) as the reference. We hypothesized that when comparing anthropometric parameters using stepwise regression analysis, the impedance value from the cross-mode analysis would have better prediction accuracy than that from the hand-to-foot mode analysis. We studied 264 men and 232 women (mean ages, 32.19 ± 14.95 and 34.51 ± 14.96 years, respectively; mean body mass indexes, 24.54 ± 3.74 and 23.44 ± 4.61 kg/m2, respectively). The DXA-measured FFMs in men and women were 58.85 ± 8.15 and 40.48 ± 5.64 kg, respectively. Multiple stepwise linear regression analyses were performed to construct sex-specific FFM equations. The correlations of FFM measured by DXA vs. FFM from hand-to-foot mode and estimated FFM by cross-mode were 0.85 and 0.86 in women, with standard errors of estimate of 2.96 and 2.92 kg, respectively. In men, they were 0.91 and 0.91, with standard errors of the estimates of 3.34 and 3.48 kg, respectively. Bland-Altman plots showed limits of agreement of -6.78 to 6.78 kg for FFM from hand-to-foot mode and -7.06 to 7.06 kg for estimated FFM by cross-mode for men, and -5.91 to 5.91 and -5.84 to 5.84 kg, respectively, for women. Paired t tests showed no significant differences between the 2 modes (P > .05). Hence, cross-mode BIA appears to represent a reasonable and practical application for assessing FFM in Chinese populations.


Assuntos
Absorciometria de Fóton/estatística & dados numéricos , Composição Corporal , Índice de Massa Corporal , Postura , Adolescente , Adulto , Idoso , Impedância Elétrica , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Reprodutibilidade dos Testes , Adulto Jovem
6.
Nutr J ; 14: 52, 2015 May 19.
Artigo em Inglês | MEDLINE | ID: mdl-25986468

RESUMO

BACKGROUND: The objectives of this study were to develop a regression model for predicting fat-free mass (FFM) in a population of healthy Taiwanese individuals using standing foot-to-foot bioelectrical impedance analysis (BIA) and to test the model's performance in predicting FFM with different body fat percentages (BF%). METHODS: We used dual-energy X-ray absorptiometry (DXA) to measure the FFM of 554 healthy Asian subjects (age, 16-75 y; body mass index, 15.8-43.1 kg/m(2)). We also evaluated the validity of the developed multivariate model using a double cross-validation technique and assessed the accuracy of the model in an all-subjects sample and subgroup samples with different body fat levels. RESULTS: Predictors in the all-subjects multivariate model included height(2)/impedance, weight, year, and sex (FFM = 13.055 + 0.204 weight + 0.394 height(2)/Impedance - 0.136 age + 8.125 sex (sex: Female = 0, Male = 1), r(2) = 0.92, standard error of the estimate = 3.17 kg). The correlation coefficients between predictive FFM by BIA (FFMBIA) and DXA-measured FFM (FFMDXA) in female subjects with a total-subjects BF%DXA of <20 %, 20 %-30 %, 30 %-40 % and >40 % were r = 0.87, 0.90, 0.91, 0.89, and 0.94, respectively, with bias ± 2SD of 0.0 ± 3.0 kg, -2.6 ± 1.7 kg, -1.5 ± 2.8 kg, 0.5 ± 2.7 kg, and 2.0 ± 2.9 kg, respectively. The correlation coefficients between FFMBIA and FFMDXA in male subjects with a total-subjects BF%DXA of <10 %, 10 %-20 %, 20 %-30 %, and >30 % were r = 0.89, 0.89, 0.90, 0.93, and 0.91, respectively, with bias ± 2SD of 0.0 ± 3.2 kg, -2.3 ± 2.5 kg, -0.5 ± 3.2 kg, 0.4 ± 3.1 kg, and 2.1 ± 3.2 kg, respectively. CONCLUSIONS: The standing foot-to-foot BIA method developed in this study can accurately predict FFM in healthy Asian individuals with different levels of body fat.


Assuntos
Tecido Adiposo/fisiologia , Envelhecimento/fisiologia , Antropometria/métodos , Composição Corporal/fisiologia , Índice de Massa Corporal , Impedância Elétrica , Adolescente , Adulto , Idoso , Povo Asiático , Estatura , Peso Corporal , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Reprodutibilidade dos Testes , Fatores Sexuais , Adulto Jovem
7.
Nutr J ; 13: 46, 2014 May 20.
Artigo em Inglês | MEDLINE | ID: mdl-24884507

RESUMO

BACKGROUND: Abdominal visceral fat affects the metabolic processes, and is an important risk factor for morbidity and mortality. The purpose of the study was to develop a quick and accurate estimate in the visceral fat area (VFA) of the L4-L5 vertebrae using anthropometric predictor variables that can be measured conveniently. METHODS: A total of 227 individuals participated in this study and were further divided into a Modeling group (MG) and a Validation group (VG). Anthropometrics measurements (height, weight, waist circumference, hip circumference, age, and subcutaneous fat thickness) and VFACT were measured using computer assisted tomography for all participants. Multivariate linear regression analysis was applied to the MG to construct a VFA estimator using anthropometric predictor variables and to evaluate its performance using the VG. RESULTS: The estimate equation obtained from the MG were VFAANT = -144.66 + 1.84X1 + 1.35X2 + 0.52X3 (r = 0.92, SEE =14.58 cm2, P < 0.001, n = 152). The X1, X2, and X3 variables in the equation were denoted as waist circumference (WC), age, and abdomen subcutaneous fat thickness (AS). In addition, the correlation between VFAANT and VFACT showed a high correlation (r = 0.92). CONCLUSION: A rapid and accurate VFA estimation can be achieved by using only age, WC, and AS. The approach in the present study provides an easy and reliable estimate that can be applied widely in health and epidemiology studies.


Assuntos
Antropometria/métodos , Gordura Intra-Abdominal/anatomia & histologia , Gordura Subcutânea/anatomia & histologia , Circunferência da Cintura , Gordura Abdominal/anatomia & histologia , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Tomografia Computadorizada por Raios X
8.
Surg Neurol ; 62(6): 501-5; discussion 505, 2004 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-15576115

RESUMO

BACKGROUND: Palmar hyperhidrosis is a common functional disorder in the Asians. Currently, transthoracic endoscopic sympathectomy (TES) is considered to be the treatment of choice for this entity because of its high initial success rate and minimal morbidity. However, primary failure and recurrence of hyperhidrosis occurred in some patients, even with a very low incidence. We present our experience in the treatment of primary failure and recurrence of hyperhidrosis after TES by means of percutaneous computer tomography (CT) guided ethanol thoracic sympathectomy. METHODS: From July 1999 to July 2001, 11 patients (2 males and 9 females with a mean age of 25.9 years, range: 19-44 years) of this subgroup underwent percutaneous CT-guided chemical thoracic sympathectomy. Failure of the first sympathectomy was caused by severe pleural adhesion (from the previous operative findings) in 7 patients. The remaining 4 patients were recurrent palmar hyperhidrosis. All patients underwent unilateral procedures (3 on the right and 8 on the left). RESULTS: All patients were followed for at least 2 years after the treatment. Needle puncture was possible without difficulty in all patients. All patients had satisfactory results with minimal complication. No recurrence was noted at follow-up. CONCLUSION: In summary, percutaneous CT-guided ethanol thoracic sympathectomy could be an easy, safe, and alternative strategy to treat patients with palmar hyperhidrosis after failure or recurrence after TES.


Assuntos
Endoscopia , Hiperidrose/terapia , Cirurgia Assistida por Computador , Simpatectomia Química , Simpatectomia , Vértebras Torácicas/cirurgia , Tomografia Computadorizada por Raios X , Adulto , Feminino , Gânglios Simpáticos/diagnóstico por imagem , Humanos , Hiperidrose/cirurgia , Masculino , Recidiva , Retratamento , Vértebras Torácicas/inervação , Falha de Tratamento , Resultado do Tratamento
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