Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 4 de 4
Filtrar
1.
Clin Radiol ; 78(3): e237-e242, 2023 03.
Artigo em Inglês | MEDLINE | ID: mdl-36588065

RESUMO

AIM: To compare the thoracic vascular opacification achieved using the standard bolus-tracking protocol (BTP) with a fixed-timing protocol (FTP) with a modified breathing instruction during computed tomography pulmonary angiography (CTPA) examinations. MATERIALS AND METHODS: A single-centre review of CTPA examinations performed between July 2018 and January 2019 using the BTP or FTP and weight-based contrast dosing of 20 mg iodine/kg body weight/s for 20 seconds at 100 kV tube potential. Radiodensity (in Hounsfield units) was analysed in the right ventricle, main pulmonary artery (MPA), left atrium, left ventricle, and ascending and descending thoracic aorta (DTA). A p-value of <0.05 was considered significant. RESULTS: Of 782 examinations, 88 BTP and 90 FTP examinations were included. Mean attenuation of the MPA was similar in the FTP (396 ± 106 HU) and BTP (362 ± 119 HU; p=0.06); however, good-quality (≥250 HU) MPA opacification was achieved in more FTP examinations (87/90, 96.7%) compared to the BTP (73/88, 82.9%; p=0.002). Mean attenuation of the DTA was better in the FTP (325 ± 72 HU) than the BTP (228 ± 75 HU; p <0.0001), with good-quality opacification (≥250 HU) in 76/90 (84.4%) FTP examinations compared with 36/88 (40.9%) BTP examinations (p <0.001). CONCLUSION: The FTP achieves better opacification of the MPA and DTA compared to the BTP.


Assuntos
Meios de Contraste , Tomografia Computadorizada por Raios X , Humanos , Tomografia Computadorizada por Raios X/métodos , Angiografia , Artéria Pulmonar/diagnóstico por imagem , Angiografia por Tomografia Computadorizada
2.
J Atten Disord ; 6(2): 49-60, 2002 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-12142861

RESUMO

Twenty-four adults (24 to 53 years old) with Attention-Deficit/Hyperactivity Disorder (ADHD), Combined Type, were studied in a double-blind, placebo-controlled, crossover study of Pycnogenol and methylphenidate. Pycnogenol is an antioxidant derived from the bark of the French maritime pine tree. Methylphenidate is a standard pharmaceutical intervention for ADHD. Anecdotal reports suggest that Pycnogenol improves concentration in adults with ADHD without adverse side effects. Participants received Pycnogenol, methylphenidate, and placebo, each for three weeks, in a randomized and counterbalanced order. Although ADHD symptoms improved during treatment, neither methylphenidate nor Pycnogenol outperformed the placebo control, as measured by self-report rating scales, rating scales completed by the individual's significant other, and a computerized continuous performance test. The conservative dosage levels and relatively brief length of treatment may have contributed to the absence of significant differences among treatment conditions. Implications for future research are noted.


Assuntos
Adjuvantes Imunológicos/uso terapêutico , Transtorno do Deficit de Atenção com Hiperatividade/tratamento farmacológico , Estimulantes do Sistema Nervoso Central/uso terapêutico , Flavonoides/uso terapêutico , Metilfenidato/uso terapêutico , Adulto , Transtorno do Deficit de Atenção com Hiperatividade/diagnóstico , Humanos , Masculino , Pessoa de Meia-Idade , Extratos Vegetais , Índice de Gravidade de Doença
3.
J Clin Psychol ; 51(4): 467-81, 1995 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-7593666

RESUMO

This study examined associations among self-esteem and self-efficacy; perceived unfavorable Parental Rearing Style (perceived PRS) and unfavorable family climate in the family of origin; and depression in undergraduates still in frequent contact with their families (N = 186). Unfavorable perceived PRS and family climate were construed as "affectionless control," in which parents and family provide little affection, but excessive control. Constructs were measured by the Self-Esteem Inventory, the Self-Efficacy Scale, the Child Report of Parental Behavior Inventory, the Family Environment Scale, and the Beck Inventory. Perceived "affectionless control" in both PRS and family climate accounted for about 13% of the variance in self-esteem, self-efficacy, and depression. Neither introversion nor depression mediated the relation between family socialization and self-esteem.


Assuntos
Transtorno Depressivo/psicologia , Família/psicologia , Poder Familiar , Autoimagem , Estudantes , Universidades , Adolescente , Adulto , Transtorno Depressivo/diagnóstico , Feminino , Humanos , Masculino
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA