Agradecimentos À Deus que sempre me amparou e me conduziu para o melhor caminho. À minha orientadora, Profª Drª Alessandra Mazzo, a quem posso chamar sem dúvidas de amiga, por ter me mostrado que um orientador não é um ser a ser temido, e sim uma pessoa que, além de te guiar academicamente, está aberta a escutar suas ânsias, desejos, virtudes e medos. À banca de qualificação, Prof a Drª Isabel Amélia Costa Mendes e Prof. Dr. José Carlos Amado Martins, pelas excelentes sugestões e críticas ao meu trabalho. À todos meus amigos. À todos os docentes e funcionários da Escola de Enfermagem de Ribeirão Preto da Universidade de São Paulo. Palavras-chave: Enfermagem; Retenção Urinária; Ultrassom. ABSTRACT JORGE, B. M. Portable ultrasound bladder: scientific evidence and self confidence of nurses. 2013. 87f. Thesis (Master Degree) -University of São Paulo at Ribeirão Preto College of Nursing, Ribeirão Preto, 2013.Nursing care in urinary retention (RU) incurs the importance of clinical evaluation of the nurse. The portable bladder ultrasound (US) is a noninvasive method that allows you to diagnose the problem, assess the volume of urine in the bladder and decide whether or not for performing urinary catheterization. This study aimed to evaluate the impact of the use of portable ultrasound bladder for the nurse's confidence during patient evaluation in urinary retention. This study was conducted in two stages:Step 1 -Integrative literature review conducted in CINAHL, MEDLINE and Web of Science databases using descriptors of nursing, ultrasound and urinary retention. Publications in the period 2001-2011 in English, Portuguese and Spanish which answered the survey questions.Step 2 -Descriptive study by ethical commitment (Opinion P129-12/2012), developed together with nurses in a rehabilitation center of Portugal with the aid of Self-Confidence Scale in Nursing Assistance Urinary Retention (EAAERU). This is a validated scale, Likert 32 items, grouped into five factors: previous steps of the catheterization realization focused on patient and professional's preparation; communication, consent and preparation of the material for performing urinary catheterization; steps performed during urinary catheterization performing and/or iatrogenic situations; steps taken after the completion of the catheterization and withdrawal; objective evaluation of UR. Were found the following results:Step 1 -Of the 234 articles found, after carefully reading the titles and abstracts, 21 articles were selected. Among them, 21 (100,0%) , were all published in English , 10 ( 47,6 % ) in nursing journals, 10 (47,6%) in medical journals and 1 (4,7%) in interdisciplinary journal. Regarding the levels of evidence , 1 (4,7%) presented level I, 1 (4,7%) level II, 9 (42,8%) level III, 1 (4,7%) level IV and 9 (42,8%) level VI. and France (4,7%). The year that had the highest number of publications was 2005 (28,5%). All articles demonstrate the effectiveness and efficiency of the use of equipment to assess patients in urinary retention.Step 2 -The sample consis...