Finally, the system of vascular interventional radiology simulator is discussed by integrating all presented techniques and designing a trackball mouse based hardware sensors. Training experiments demonstrate that the presented techniques benefit rapid development of realistic and interactive vascular interventional radiology simulators. / Fourth, in order to clearly visualize vascular networks and the placement of instruments while treating the lesion, a physics-based simulation for angiography procedure is presented based on navier-stokes equation and semi-lagrangian method. The multi-scale vessel grid is reconstructed for flow distribution, and point sprites based rendering is adopted to preserve real-time visualization of the procedure. The experiments demonstrate that our results are more realistic compared to previous methods and are closer to the real angiography procedure. / In order to build a high fidelity interventional simulator for physician training and surgery planning, accurate reconstruction of three dimensional vascular network, real-time simulation of angiographic medium propagation and physics-based simulation of interaction between surgical instruments and vessel wall are absolutely indispensable. Thus, first, a methodology for geometric vascular modeling is proposed. As the reconstructed models are essential for many subsequent applications such as deformable modeling and visualization, a series of methods are proposed based on the parallel transport frames in order to maintain high mesh quality of these models. An improved bifurcation modeling method and two novel trifurcation modeling methods are developed based on 3D Bezier curve segments in order to ensure the continuous surface transition at furcations. To solve the twisting problem caused by frame mismatch of two successive furcations, a frame blending scheme is implemented. A curvature based adaptive sampling scheme combined with a mesh quality guided frame tilting algorithm is developed to construct an evenly distributed, non-concave and self-intersection free surface mesh. In terms of surface mesh quality criteria, our methodology can generate vascular models with better mesh quality than previous methods. / Second, we extend our geometric modeling method for illustrative visualization of vasculature, which is an indispensable component in medical education and training. Illustration of vasculature accentuates depth perception and provides a specific manner to identify the branching pattern and topology of vascular structure, which is crucial for therapy planning and real surgery in order to give an effective treatment. With advanced GPU acceleration techniques including render to texture (RTT) , framebuffer object (FBO) and fast image convolution, a real-time visualization can be achieved. / Third, an interactive simulation of angioplasty procedure is reported. To achieve an efficient modeling of soft tissue deformation and virtual device mechanics, mass spring models are adopted to construct the deformable models of vessel wall and stent. By designing a quasi-equilateral triangular mesh model of blood vessel and stent, a linear spring coefficients setting method is adopted to achieve the same accuracy compared with finite element method. With the employment of Physics Processing Unit (PPU), a real-time simulation of the interaction between blood vessel wall and surgical device is developed for vascular interventional radiology simulation. / Vascular diseases have been the leading cause of death worldwide. Interventional procedures are an increasingly promising therapy for treating vascular diseases, which are usually done by a guidewire-catheter combination under the fluoroscopic guidance. However, due to the complicated vascular network, bending of surgical instruments and the risk of vessel injury, these techniques need to be performed by highly trained and experienced specialists. Virtual reality based training of these procedures offers high flexibility and cost effective alternative. Furthermore, it allows training evaluation and accelerates learning process without risk to patients, therefore has distinct advantages than traditional training methods on animals or cadavers. / Guo, Jixiang. / Advisers: Pheng-Ann Heng; Tien-Tsin Wong. / Source: Dissertation Abstracts International, Volume: 73-06, Section: B, page: . / Thesis (Ph.D.)--Chinese University of Hong Kong, 2011. / Includes bibliographical references (leaves 97-111). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [201-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstract also in Chinese.

Zhu, Fang. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2013. / Includes bibliographical references (leaves 171-185). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstracts also in Chinese.

<p>Karcinom bronha najče&scaron;ći uzrok smrti među malignim bolesti u svetu. U XX veku je registrovan značajan porast kako incidence, tako i mortaliteta karcinoma bronha u većini zemalja. Medijana preživljavanja u svim stadijumima bolesti se značajno pobolj&scaron;ala poslednjih godina XX veka, ali nedovoljno u odnosu na očekivano. U najvećem broju slučajeva, bolest se otkriva u uznapredovalom stadijumu, kada je radikalno hirur&scaron;ko lečenje kao optimalan vid lečenja nemoguće. Neodjuvantna terapija kod bolesnika sa lokalno uznapredovalim karcinomom pluća i zahvaćenim N2 limfnim čvorovima jedan je od modusa multimodalnog lečenja bolesnika sa nemikrocelularnim karcinomima pluća (NSCLC) u cilju pobolj&scaron;anja ishoda njihovog lečenja. Ovakav pristup podrazumeva prevođenje pacijenta iz vi&scaron;eg u niži stadijum bolesti - &bdquo;downstaging&rdquo;. Na taj način pacijent postaje potencijalno resektabilan u smislu daljeg hirur&scaron;kog lečenja koji bi mogao da obezebedi sveukupni onkolo&scaron;ki benefit. Osnovni ciljevi ove doktorske disertacije su bili: procena odgovora na neoadjuvantnu terapiju kod bolenika sa IIIA stadijumom nemikrocelularnog karcinoma bronha u odnosu na T faktor i N faktor, procena TNM klasifikacije pre i posle primenjene neoadjuvantne terapije kod bolesnika sa IIIA stadijumom nemikrocelularnog karcinoma bronha, određivanje stepena tumorske regresije patohistolo&scaron;kom analizom hirur&scaron;kog resekata nemikrocelularnog karcinoma bronha operisanih bolesnika nakon primenjene neoadjuvantne terapije, kao prognostički faktor za period bez bolesti i ukupnog preživljavanja i određivanje stepena regresije tumora u maligno izmenjenim limfnim čvorovima nakon primenjene neoadjuvantne terapije kod bolesnka sa IIIA stadijumom nemikrocelularnog karcinoma bronha, kao prognostički faktor za period bez bolesti i ukupnog preživljavanja.Rezultati su pokazali da neoadjuvantna terapija prema RECIST kriterijumima dovodi značajnog smanjenja veličine tumora, T faktora, kao i do znčajnog downstaging&ldquo;-a nodalnog statusa, N faktora, u terapiji bolesnika sa IIIA stadijumom nemikrocelularnog karcinoma bronha. Neoadjuvantna terapija prema RECIST kriterijumima dovodi značajnog smanjenja klinikog stadijuma bolesti, u terapiji bolesnika sa IIIA stadijumom nemikrocelularnog karcinoma bronha Nakon primenjene neoadjuvantne terapije nema značajne razlike u T faktoru koji je određen radiolo&scaron;ki prema RECIST kriterijumima (ycT) i patohistolo&scaron;ki (ypT) na hirur&scaron;kom materijalu. Nakon primenjene neoadjuvantne terapije prisutna je značajna razlika u N faktoru koji je određen radiolo&scaron;ki prema RECIST kriterijumima (ycN) i patohitolo&scaron;ki (ypN) na hirur&scaron;kom materijalu. Nakon primenjene neoadjuvantne terapije prisutna je značajna razlika u kliničkom stadijumu bolesti koji je određen radiolo&scaron;ki prema RECIST kriterijumima (yc) i patohitolo&scaron;ki (yp) na hirur&scaron;kom materijalu. Gradusi tumorske regresije su usko povezani sa procentom očuvanog tumorskog tkiva. Stepen tumorske regresije u resekatu primarnog tumora nije u korelaciji sa ukupnim preživljavanjem i procenom perioda bez bolesti kod pacijenata sa IIIA stadijumom nemikrocelularnog karcinoma bronha.</p> / <p>Lung cancer is the most common cause of death among malignant diseases in the world. In the twentieth century was a significant increase in both incidence and mortality of lung cancer in most countries. Median survival in all stages of the disease has improved significantly in recent years of the twentieth century, but not as we expected. In most cases, the disease is detected at an advanced stage, when the radical surgical treatment is considered impossible. Neoadjuvant therapy, in patients with locally advanced carcinoma of the lung, and with affected the lymph nodes N2, is one of the modes of multimodal treatment of patients with non-small cell lung cancer (NSCLC) in order to improve the outcome of their treatment. This involves translating the patient from a higher to a lower stage of the disease - &quot;downstaging&quot;. In this way the patient is considered for further surgical treatment that could provide him overall oncology benefit. Main objectives of this PhD dissertation are: evaluation of response to neoadjuvant therapy in stage IIIA NSCLC patients in relation to T factor and N factor; evaluation of TNM classification before and after use of neoadjuvant therapy in stage IIIA NSCLC patients; determination of degree of tumor regression with pathohistologic analysis of resection specimen of NSCLC obtained from patients after application of neoadjuvant therapy, as a prognostic factor for disease-free period and overall survival rate; and determination of degree of tumor regression in malignant lymph nodes after application of neoadjuvant therapy in stage IIIA NSCLC patients, as a prognostic factor for disease-free period and overall survival rate. Results have shown that neoadjuvant therapy according to RECIST criteria leads to significant reduction of tumor size, T factors, as well as significant downstaging of nodal status, N factor, in treatment of stage IIIA NSCLC patients. Furthermore, neoadjuvant therapy according to RECIST criteria leads to significant reduction of clinical stage of the disease in treatment of stage IIIA NSCLC patients. However, after neoadjuvant therapy is applied there is no significant difference in T factor determined radiologically according to RECIST criteria (ycT) and by pathohistologic analysis (ypT) of resected specimen. Neoadjuvant therapy leads to significant difference in N factor which is determined radiologically according to RECIST criteria (ycN) and by pathohistologic analysis (ypN) of resection specimen. After neoadjuvant therapy is applied there is significant difference in clinical stage of the disease determined radiologically according to RECIST criteria (yc) and by pathohistologic analysis (yp) of resection specimen. Tumor regression grading is closely linked to the percentage of preserved tumor tissue. Degree of tumor regression in surgical resection of primary tumor does not correlate to the overall survival rate and estimation of disease-free period in stage IIIA NSCLC patients.</p>

Introdução: As cavidades nasais constituem a via de acesso à hipófise na cirurgia transesfenoidal endoscópica. Deste modo, alterações naturais ou adquiridas da anatomia nasal podem prejudicar a cirurgia. Objetivos: Estudar as variações anatômicas das cavidades nasais, principalmente desvio do septo, correlacionando-as com a visibilidade no acesso transesfenoidal endoscópico, para subsidiar a decisão do tipo de acesso ou necessidade de correção do desvio. Material e Método: Estudo seccional em 38 pacientes submetidos ao acesso transesfenoidal endoscópico entre fevereiro de 2009 e janeiro de 2011 em centro de referência. No intraoperatório foram registradas as variações anatômicas, localização do desvio de septo no plano axial e coronal, largura do corredor cirúrgico, profundidade do acesso até o esfenoide e a sela, exposição do esfenoide e da sela após abertura dos mesmos. A dificuldade de visibilidade do acesso foi avaliada por escala ordinal: 0- sem dificuldade, 1- dificuldade leve a moderada, 2- dificuldade acentuada. Os testes empregados para correlação entre as variáveis foram qui-quadrado e razão de verossimilhança. A comparação entre duas médias foi pelo teste t de Student e três ou mais médias pela análise de variância (ANOVA), com teste complementar de Turkey. Resultados: Foram estudadas 76 cavidades nasais e foram observados 50 desvios septais (66%). A largura do corredor cirúrgico no local do desvio menor ou igual a 9 mm associou-se em 72% à dificuldade acentuada (p<0,001). Desvios de septo no andar médio (p=0,005) ou terço posterior (p<0,001) associaram-se à dificuldade acentuada. A largura da cavidade na região do desvio também foi menor no desvio do andar médio (8,41 mm, p=0,012) ou no desvio do terço posterior (6,9 mm, p<0,0001). No corredor cirúrgico, apenas a largura do meato médio se associou à dificuldade (5-13 mm, 73% dificuldade acentuada, p=0,001). Variações anatômicas das conchas foram observadas em 17%, sem impacto na visibilidade. O comprimento médio do septo nasal foi 64 mm (IC95%: 61,8-66,8 mm), a profundidade até o rostro do esfenoide 69 mm (IC95%: 67-71 mm) e até a sela 82 mm (IC 95%: 80,2- 83,8 mm). A exposição média do esfenoide foi de 20 mm (laterolateral) e 20,8mm (anteroposterior), enquanto da sela foi de 12,8 mm e 11,7 mm respectivamente. Conclusões: A largura da cavidade nasal na região do desvio e a presença de desvio de septo localizado em terço posterior ou no andar médio da cavidade nasal associaram-se à maior dificuldade na visibilidade do acesso transesfenoidal / Background: Nasal anatomical variations can impair the visibility on endoscopic transsphenoidal approach for pituitary tumors. Objective: To evaluate anatomical variations, mainly nasal septum deviation, and their impact on the visibility of transsphenoidal endoscopic approach. To support the decision of access type or need to correct the deviated septum. Methods: Cross-sectional study with 38 patients who underwent transsphenoidal endoscopic surgery using the two nostrils - four hands between February 2009 and January 2011 in a referral center. They were submitted to the intraoperative register of anatomical variations, septal deviations, surgical corridor width and location of the deviated septum (height and depth), depth of the access to sphenoid and sella, exposure of sphenoid and sella after opening. Visibility was assessed using an ordinal scale: 0- no difficulty, 1- low to moderate difficulty, 2- severe difficulty. Comparisons of two means were performed using Students t test, and three or more means using analysis of variance (ANOVA) with Turkeys complementary test. Correlations between scores were analyzed using the non-parametric chi-square test and the likelihood ratio. Results: Seventy-six nasal cavities were studied, and 50 septal deviations were found (66%). Among the patients with severe difficulty, 73% had a surgical corridor width in the location of the deviated septum of up to 9 mm (p < 0.001). Septal deviations in the middle level (p = 0.005) or posterior third (p < 0.001) were associated with severe difficulty. The width of the nasal cavity at the deviation was also smaller in the middle level (8.41 mm, p = 0,012) or posterior third (6.9 mm, p<0.001). In the surgical corridor, only the middle meatus was associated with difficulty (5 to 13 mm, 73% severe difficulty, p = 0.001). Anatomical variations of the nasal conchae were observed in 17% of cases with no impact on visibility. The average length of the nasal septum was 64 mm (95% CI 61.8 -66.8 mm); the mean depth to the sphenoid was 69 mm (95% CI 67-71 mm) and to the sella 82 mm (95% CI 80.2 - 83.8 mm). The average lateral exposure of the sphenoid was 20 mm and anteroposterior 20.8 mm and to the sella 12.8 mm and 11.7 mm respectively. Conclusions: The width of nasal cavity at deviation and site of septal deviation were associated with difficulty in visibility of the access. Septal deviations located at posterior third and at middle level in nasal cavities were strongly associated with difficulty

O prolapso da cúpula vaginal é uma patologia rara, que há mais de 100 anos sua fisiopatologia e tratamento têm sido alvo de discussão, devido ao grau de dificuldade de um tratamento com preservação da anatomia. A técnica considerada como padrão-ouro para esta correção é a promontofixação abdominal, porém a alta morbidade associada à laparotomia é um fator de restrição ao uso da técnica. Neste aspecto, as técnicas de abordagens vaginais oferecem vantagem de menor morbidade e menor tempo cirúrgico quando comparadas às técnicas abdominais. Este trabalho teve por objetivo avaliar a Técnica da Sacropexia Infracoccígea na fixação da cúpula vaginal. Foram estudadas 36 mulheres com prolapso da cúpula vaginal no período de março de 2004 à fevereiro de 2008 as quais foram submetidas ao tratamento cirúrgico para correção do prolapso segundo a Técnica da Sacropexia Infracoccígea. As mulheres foram estadiadas quanto ao grau do prolapso segundo a Padronização dos Prolapsos Genitais da ICS - POPq antes e após o procedimento e foram submetidas a avaliação da qualidade de vida através da aplicação do Questionário de Qualidade de Vida em Prolapso, nos mesmos períodos de avaliação do exame ginecológico. Para avaliar a cúpula vaginal foi utilizado o Ponto C do POPq e submetido a tratamento estatístico. As mulheres foram acompanhadas por um tempo médio de 30,9 meses (10 a 55 meses). O Ponto C avaliado antes e após o procedimento variou de média de +6 (antes do procedimento) para média de -6,5 (após 24 meses da correção). A variação do Ponto C foi estatisticamente significante. Houve somente uma recidiva do prolapso após 24 meses de avaliação. Quanto ao Questionário de Qualidade de vida houve redução significativa da pontuação pós-operatória, mostrando melhora importante na qualidade de vida das mulheres estudadas (p<0,05). Em uma média de 30,9 meses de estudo a técnica foi eficaz na redução do prolapso da cúpula vaginal e na melhora da qualidade de vida das mulheres estudadas. / The vaginal vault prolapse isn´t a common pathology that there are at least one hundred years it´s physiopathology and treatment have been discussed. It´s occurs mainly by the difficulty to find an anatomic preservation treatment. The most accept technique is the abdominal colposacropexy and it´s considered the gold standard for some authors, although the high morbidity associated with it is a restriction factor. On the other hand, the vaginal techniques take less morbidity and less surgical time to perform the procedure regards abdominal techniques. The objective of this work was to evaluate long-term results and long-term patients satisfaction of infracoccigeal sacropexy technique performed for massive vaginal vault prolapse. A prospective analysis was performed of 36 women who underwent vaginal vault prolapse correction by the infracoccigeal sacropexy technique during the period of march, 2004 to February, 2008. The gynecological exam was performed by the Pelvic Organ Prolapse Standardization (POP-q) and a validated questionnaire (Prolapse Quality of Life Questionnaire) was used to evaluate patients´ satisfaction before and after surgery, at the same evaluation periods. To evaluate the vaginal vault prolapse, the Point C of POPq was taken before and after surgery and an appropriate statistical analysis was performed. The women was followed by a mean time of 30,9 months (10 to 55 months). The point C variation media was +6 before the procedure to -6,5 after the procedure (after 24 months after surgery). It was statistically significant (p<0,05). There was only one vaginal vault prolapse recurrence after 24 months of evaluation. The quality of life questionnaire showed patients´ satisfaction was statistically improved after the procedure (p<0,05). Taking a mean time of 30,9 months the technique was efficient to reduce the vaginal vault prolapse and to improve the quality of life in the group of study.

INTRODUÇÃO: O presente estudo visa avaliar a possibilidade da realização da prostatectomia radical retropúbica com alta hospitalar no mesmo dia do procedimento, tendo como objetivo a redução de custos, mantendo a qualidade do atendimento, a satisfação dos pacientes com o tratamento e a segurança. MÉTODOS: Foram selecionados 27 pacientes com câncer de próstata, no período de abril de 2011 a janeiro de 2012, que apresentavam baixo risco cirúrgico e optaram pela prostatectomia radical retropúbica. Os pacientes eram orientados sobre a proposta de alta no mesmo dia do procedimento e submetidos a um conjunto de medidas que visavam à aceleração da recuperação pós-operatória. Foram avaliadas a possibilidade da PRR em caráter ambulatorial, as complicações perioperatórias, e a satisfação dos pacientes com o tratamento. RESULTADOS: Onze pacientes obtiveram alta no mesmo dia do procedimento, treze receberam alta na manhã seguinte a cirurgia (24hs) e três no segundo dia pós-operatório. Todos os pacientes foram submetidos à anestesia geral associada à bloqueio peridural. O uso de opióide na anestesia peridural em doses seguras foi administrado em treze pacientes, melhorando o controle da dor e possibilitando a alta antecipada em oito (61,5%) pacientes. Apenas três (21,4%) pacientes que não receberam opióide em peridural obtiveram alta no mesmo dia da cirurgia (p = 0,04). O tempo cirúrgico médio foi de 120min (+/- 20 min) e a perda sanguínea estimada média foi de 758 ml (+/- 344 ml). Nenhum paciente apresentou complicação grave ou teve que ser readmitido no hospital. Não houve diferença entre o grupo que teve alta no mesmo dia da cirurgia e o grupo que permaneceu internado mais tempo na avaliação da satisfação dos pacientes com o tratamento. CONCLUSÃO: A Prostatectomia Radical Retropúbica pode ser realizada em caráter ambulatorial, em pacientes devidamente selecionados, sem diminuição da satisfação do paciente com o tratamento / INTRODUCTION: This study aims to evaluate the possibility of performing in our midst the open radical prostatectomy with discharge on the same day of the procedure, aiming the improvement of postoperative recovery and reduce hospital costs without loss of quality of care, or decreased patient satisfaction with treatment. METHODS: We selected 27 patients with localized prostate cancer during the period from April 2011 to January 2012, which had a low surgical risk and opted for the open radical prostatectomy. The patients were properly informed about the proposed discharge on the same day of the procedure and underwent a series of measures to accelerate postoperative recovery. We evaluated the feasibility of outpatient open radical prostatectomy, perioperative complications, and patient satisfaction with treatment. RESULTS: Eleven (40,7%) patients were discharged on the same day of the procedure, thirteen were discharged in the morning after surgery and three in the second postoperative day. All patients underwent general anesthesia. The use of opioids in safe doses for epidural anesthesia, was administered in 13 patients, improving pain control and enabling early discharge in 8 (61,5%) patients. Only 3 (21.4%) patients who did not receive epidural opioid achieved discharge on the same day of surgery (p = 0.04). The mean operative time was 120 (+20 min) and average estimated blood loss was 758ml (+344ml). No patient had a major complication or was readmitted to the hospital. There was no difference in patient satisfaction with treatment between the group of the same day surgery and the patients with longer hospitalization. CONCLUSION The open radical prostatectomy can be performed with safety on an outpatient basis, in properly selected patients, with no decrease in patient satisfaction with treatment

A ansiedade pode ser considerada uma experiência leve ou intensa, no momento anterior ao procedimento cirúrgico eletivo; é um sentimento comumente relatado pelo paciente que será submetido a uma cirurgia. Assim, a forma como ele enfrenta-a pode interferir na recuperação pós-operatória, com altos níveis de dor, distúrbios no sono, nutrição e atividade física, além de dificuldades na cicatrização da ferida operatória. O presente estudo teve como objetivo avaliar a presença de ansiedade no préoperatório imediato em pacientes cirúrgicos. Tratou-se de uma pesquisa observacional e analítica, de delineamento longitudinal, realizada em um hospital geral de uma cidade do interior do Estado de Minas Gerais. Uma amostra consecutiva e não probabilística foi constituída por 64 pacientes, de ambos os sexos, internados na clínica cirúrgica de um hospital público, no período de julho e agosto de 2016, e que atenderam aos seguintes critérios de elegibilidade: idade igual ou superior a 18 anos e submissão à cirurgia eletiva de médio porte. Para a coleta de dados foi elaborado um instrumento que teve seu conteúdo e aparência validados por três especialistas na área de conhecimento do tema investigado. Dentre os itens desse instrumento, constava a avaliação da pressão arterial sistêmica e da frequência cardíaca. A ansiedade foi mensurada pelo Inventário de Ansiedade Traço-Estado (IDATE) versão reduzida (intervalo de 13 a 49, maiores valores, maior ansiedade) e pela análise da alfa-amilase salivar (de 0 a 299 Ku/l, maiores valores indicando maior ansiedade). A coleta de dados foi realizada pela pesquisadora em dois momentos: no período préoperatório imediato, obtendo-se as informações na enfermaria, após a admissão do paciente, cerca de 12 horas anteriores ao procedimento cirúrgico e no segundo momento, também na enfermaria, no dia da cirurgia, uma hora antes dele ser encaminhado ao centro cirúrgico, avaliando os dados mencionados anteriormente. Os dados foram analisados descritivamente e para os testes de hipóteses, utilizamos os testes t de Student e de Wilcoxon, ambos para amostras dependentes; Teste de Mann-Whitney para comparar dois grupos independentes; e o teste de Correlação de Spearman para quantificar a correlação entre as duas variáveis respostas (IDATE versão reduzida e alfa-amilase salivar) e as variáveis explanatórias. Análise de regressão linear múltipla foi conduzida para avaliar a contribuição das variáveis explanatórias na determinação da ansiedade, avaliada no segundo momento. O nível de significância adotado foi de 0,05. Como resultados, constatamos que houve diferenças estatisticamente significantes entre as medidas do IDATE versão reduzida (<0,001) e da pressão arterial sistólica (<0,001) e diastólica (<0,001), quando comparamos os valores em t1 e t2. Obtivemos correlação estatisticamente significante apenas entre o IDATE versão reduzida e a idade (r=-0,404; p=0,001), somente na primeira avaliação. Na avaliação das correlações com a medida de alfa-amilase salivar e pressão arterial, frequência cardíaca e idade não houve resultados estatisticamente significante nas duas avaliações. Ao avaliarmos a presença de ansiedade e o uso de psicofármacos durante a internação pré-operatória, constatamos média menor da alfa-amilase salivar no grupo que fez uso do medicamento (p=0,002). No modelo de regressão linear multivariada, tendo como variável dependente a ansiedade (IDATE versão reduzida), na segunda avaliação e como variáveis explanatórias a idade, pressão arterial sistólica (em t1) e ansiedade (IDATE versão reduzida em t1), explicou 48,7% da variância. Apenas a variável correspondente à primeira medida de ansiedade foi estatisticamente significante no modelo testado. Conclui-se que as duas medidas de ansiedade usadas não apresentaram correlação forte/moderada e estatisticamente significante. A avaliação da ansiedade nos dois momentos teve diferença quando mensurada pelo IDATE versão reduzida, sendo a média em t1 maior do que em t2, o que não ocorreu quando avaliada pela amilase salivar / Anxiety can be considered either as a mild or an intense experience at the time preceding an elective surgical procedure; this is a feeling commonly reported by patients who will be submitted to a surgical procedure. Hence, the way surgical patients face this anxiety can interfere with postoperative recovery, with high levels of pain, disorders regarding sleep, nutrition, and physical activity, and difficulty in healing the operative wound. The aim of this study was to assess the presence of anxiety in the immediate preoperative period of surgical patients. An observational analytical study, with a longitudinal design, was conducted in the general hospital of a city in the state of Minas Gerais. The study sample was consecutive and nonprobabilistic, and consisted of 64 patients, both male and female, who were hospitalized in the surgical ward of a public hospital between July and August 2016, and met the following eligibility criteria: being 18 years old or over, and being submitted to a medium-size elective surgery. An instrument was created for data collection, and its face and content were validated by three experts in the area of knowledge under study. The assessment of systemic blood pressure and heartbeat was included in this instrument. Anxiety was measured by means of the anxiety scale STAI-S revised (13-49 interval, higher values, higher anxiety), and by salivary amylase analysis (0-299Ku/l, higher values, higher anxiety). Data were collected at two different times by the researcher: in the immediate preoperative period, in which data were obtained in the nursing ward once patients were admitted, about 12 hours before the procedure, and at a second time, still in the nursing ward, on the day of surgery, one hour before they were sent to the surgical center, in order to assess the data previously mentioned. The data were analyzed descriptively and the Student\'s t and Wilcoxon tests were used for the hypotheses tests, both for dependent samples; the Mann-Whitney test was used to compare the two independent groups, and Spearman\'s correlation test was used to quantify the correlation between the two response variables (STAI-S revised and salivary amylase analysis) and the explanatory variables. A multiple linear regression analysis was conducted to assess the contribution of the explanatory variables in determining anxiety, assessed at the second time of collection. A 0.05 level of significance was adopted. According to the results, statistically significant differences were found between the STAI-S revised (<0.001) and systolic (<0.001) and diastolic (<0.001) blood pressure values, when comparing values at the two times of collection. There was a statistically significant correlation between the STAI-S revised and age (r=- 0.404; p=0.001), only at the first assessment. There were no statistically significant results, at both times, in the assessment of the correlations to the salivary amylase and blood pressure, heartbeat and age. When assessing the presence of anxiety and the use of psychotropics during the preoperative hospitalization, a lower mean of salivary alpha-amylase was found in the group that used medications (p=0.002). Multivariate linear regression analysis explained 48.7% of the variance, having anxiety as the dependent variable (STAI-S revised), in the second assessment, and age, systolic blood pressure (at time 1) and anxiety (STAI-S revised at time 1) as explanatory variables. Only the variable corresponding to the first assessment of anxiety was statistically significant in the tested model. In conclusion, both anxiety assessments did not present a strong/moderate and statistically significant correlation. The assessment of anxiety at two times was different when measured by the STAI-S revised, with the mean at time 1 being higher than that in time 2, which did not occur in the assessment by salivary amylase

INTRODUÇÃO: O presente estudo visa avaliar a possibilidade da realização da prostatectomia radical retropúbica com alta hospitalar no mesmo dia do procedimento, tendo como objetivo a redução de custos, mantendo a qualidade do atendimento, a satisfação dos pacientes com o tratamento e a segurança. MÉTODOS: Foram selecionados 27 pacientes com câncer de próstata, no período de abril de 2011 a janeiro de 2012, que apresentavam baixo risco cirúrgico e optaram pela prostatectomia radical retropúbica. Os pacientes eram orientados sobre a proposta de alta no mesmo dia do procedimento e submetidos a um conjunto de medidas que visavam à aceleração da recuperação pós-operatória. Foram avaliadas a possibilidade da PRR em caráter ambulatorial, as complicações perioperatórias, e a satisfação dos pacientes com o tratamento. RESULTADOS: Onze pacientes obtiveram alta no mesmo dia do procedimento, treze receberam alta na manhã seguinte a cirurgia (24hs) e três no segundo dia pós-operatório. Todos os pacientes foram submetidos à anestesia geral associada à bloqueio peridural. O uso de opióide na anestesia peridural em doses seguras foi administrado em treze pacientes, melhorando o controle da dor e possibilitando a alta antecipada em oito (61,5%) pacientes. Apenas três (21,4%) pacientes que não receberam opióide em peridural obtiveram alta no mesmo dia da cirurgia (p = 0,04). O tempo cirúrgico médio foi de 120min (+/- 20 min) e a perda sanguínea estimada média foi de 758 ml (+/- 344 ml). Nenhum paciente apresentou complicação grave ou teve que ser readmitido no hospital. Não houve diferença entre o grupo que teve alta no mesmo dia da cirurgia e o grupo que permaneceu internado mais tempo na avaliação da satisfação dos pacientes com o tratamento. CONCLUSÃO: A Prostatectomia Radical Retropúbica pode ser realizada em caráter ambulatorial, em pacientes devidamente selecionados, sem diminuição da satisfação do paciente com o tratamento / INTRODUCTION: This study aims to evaluate the possibility of performing in our midst the open radical prostatectomy with discharge on the same day of the procedure, aiming the improvement of postoperative recovery and reduce hospital costs without loss of quality of care, or decreased patient satisfaction with treatment. METHODS: We selected 27 patients with localized prostate cancer during the period from April 2011 to January 2012, which had a low surgical risk and opted for the open radical prostatectomy. The patients were properly informed about the proposed discharge on the same day of the procedure and underwent a series of measures to accelerate postoperative recovery. We evaluated the feasibility of outpatient open radical prostatectomy, perioperative complications, and patient satisfaction with treatment. RESULTS: Eleven (40,7%) patients were discharged on the same day of the procedure, thirteen were discharged in the morning after surgery and three in the second postoperative day. All patients underwent general anesthesia. The use of opioids in safe doses for epidural anesthesia, was administered in 13 patients, improving pain control and enabling early discharge in 8 (61,5%) patients. Only 3 (21.4%) patients who did not receive epidural opioid achieved discharge on the same day of surgery (p = 0.04). The mean operative time was 120 (+20 min) and average estimated blood loss was 758ml (+344ml). No patient had a major complication or was readmitted to the hospital. There was no difference in patient satisfaction with treatment between the group of the same day surgery and the patients with longer hospitalization. CONCLUSION The open radical prostatectomy can be performed with safety on an outpatient basis, in properly selected patients, with no decrease in patient satisfaction with treatment

Han, Jianguo. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2008. / Includes bibliographical references (leaves 66-76). / Abstracts in English and Chinese. / Declaration --- p.i / Acknowledgement --- p.□ / Publication --- p.□ / Abstract (English) --- p.□xi / Abstract (Chinese) --- p.□ / Abbreviations --- p.ix / List of figures / tables --- p.x / Chapter Chapter 1. --- General Introduction / Chapter 1.1 --- Role of vascular smooth muscle cells in the control of coronary circulation --- p.1 / Chapter 1.1.1 --- Potassium channels in the coronary smooth muscle cells --- p.2 / Chapter 1.1.1.1 --- Voltage -dependent potassium (Kv) channels --- p.3 / Chapter 1.1.1.2 --- Inward rectifier K+ (Kir) channels --- p.4 / Chapter 1.1.1.3 --- ATP-sensitive potassium (Katp) channels --- p.4 / Chapter 1.1.2 --- BKCa channels in the regulation of vascular function --- p.6 / Chapter 1.1.2.1 --- The structure of BKCa channels --- p.6 / Chapter 1.1.2.2 --- Role of BKCa channels in the regulation of vascular function --- p.6 / Chapter 1.2 --- Functional alteration of the coronary SMCs during cardiac surgery --- p.7 / Chapter 1.2.1 --- Effect of ischemia on the function of SMCs in the coronary circulation --- p.8 / Chapter 1.2.2 --- Effect of cardioplegic/organ preservation solutions on the function of SMCs in the coronary circulation --- p.11 / Chapter Chapter 2. --- Materials and Methods --- p.14 / Chapter 2.1 --- Isometric force study in small coronary arteries --- p.14 / Chapter 2.1.1 --- Preparation of porcine small coronary arteries --- p.14 / Chapter 2.1.2 --- Experiment procedure --- p.15 / Chapter 2.1.2.1 --- Mounting of small coronary arteries --- p.15 / Chapter 2.1.2.2 --- Normalization procedure for small coronary arteries --- p.16 / Chapter 2.1.2.3 --- Precontraction and relaxation --- p.17 / Chapter 2.1.3 --- Data acquisition and analysis --- p.17 / Chapter 2.2 --- Patch-clamp electrophysiology --- p.18 / Chapter 2.2.1 --- Preparation of porcine coronary arteries --- p.18 / Chapter 2.2.2 --- Enzymatic dissociation of coronary arterial SMCs --- p.18 / Chapter 2.2.3 --- Primary cell culture --- p.19 / Chapter 2.2.4 --- Recording of BKca channel currents --- p.19 / Chapter 2.3 --- Statistical analysis --- p.21 / Chapter 2.4 --- Chemicals --- p.21 / Chapter Chapter 3. --- The Effect of Ischemia on BKCa channels in the Isolated SMCs of Coronary Arteries --- p.22 / Chapter 3.1 --- Abstract --- p.22 / Chapter 3.2 --- Introduction --- p.23 / Chapter 3.3 --- Experimental design and analysis --- p.25 / Chapter 3.3.1 --- Isometric force study in small coronary arteries --- p.25 / Chapter 3.3.2 --- Effect of ischemia on NS1619-induced relaxation in small coronary arteries --- p.26 / Chapter 3.3.3 --- Effect of ischemia on smooth muscle BKca channel currents --- p.27 / Chapter 3.3.3.1 --- Preparation of porcine coronary artery --- p.27 / Chapter 3.3.3.2 --- Enzymatic dissociation of coronary arterial SMCs --- p.27 / Chapter 3.3.3.3 --- Recording of BKCa channel currents --- p.27 / Chapter 3.3.4 --- Data acquisition and analysis --- p.28 / Chapter 3.4 --- Results --- p.28 / Chapter 3.4.1 --- Electrophysiological studies --- p.28 / Chapter 3.4.1.1 --- Effect of IBTX on the whole cell outward currents --- p.29 / Chapter 3.4.1.2 --- Effect of ischemia on the IBTX-sensitive BKca currents --- p.30 / Chapter 3.4.2 --- Relaxation studies --- p.30 / Chapter 3.4.2.1 --- Resting force --- p.30 / Chapter 3.4.2.2 --- U46619-induced contraction force --- p.31 / Chapter 3.4.2.3 --- Effect of IBTX on the NS1619-induced relaxation --- p.31 / Chapter 3.4.2.4 --- Effect of ischemia on the NS1619-induced relaxation --- p.31 / Chapter 3.5 --- Discussion --- p.32 / Chapter 3.5.1 --- Functional changes of the coronary smooth muscle BKca channels after ischemic exposure --- p.33 / Chapter 3.5.2 --- Role of BKca channels in SMCs during ischemia --- p.33 / Chapter 3.5.3 --- Clinical implications --- p.35 / Chapter Chapter 4. --- The Effect of Hyperkalemia on BKCa channels in the Isolated SMCs of Coronary Arteries --- p.41 / Chapter 4.1 --- Abstract --- p.41 / Chapter 4.2 --- Introduction --- p.42 / Chapter 4.3 --- Experimental design and analysis --- p.44 / Chapter 4.3.1 --- Isometric force study in small coronary arteries --- p.44 / Chapter 4.3.1.1 --- Effect of hyperkalemia on NS1619-mediated relaxation in small coronary arteries --- p.44 / Chapter 4.3.2. --- Effect of hyperkalemia on BKCa currents of SMCs --- p.45 / Chapter 4.3.2.1 --- Preparation of porcine coronary arteries --- p.45 / Chapter 4.3.2.2 --- Enzymatic dissociation of coronary arterial SMCs --- p.45 / Chapter 4.3.2.3 --- Recording of BKca channel currents --- p.46 / Chapter 4.3.3. --- Data acquisition and analysis --- p.46 / Chapter 4.4 --- Results --- p.47 / Chapter 4.4.1 --- Effect of hyperkalemia on the iberiotoxin-sensitive BKCa channel currents --- p.47 / Chapter 4.4.2 --- Relaxation studies --- p.48 / Chapter 4.4.2.1 --- Resting force --- p.48 / Chapter 4.4.2.2 --- U46619- and high K+-induced contraction force --- p.48 / Chapter 4.4.2.3 --- Effect of high K+ on the NS1619-induced relaxation --- p.48 / Chapter 4.4.2.4 --- Effect of IBTX on the NS1619-induced relaxation --- p.49 / Chapter 4.5 --- Discussion --- p.49 / Chapter 4.5.1 --- Role of BKCa channels in the isolated SMCs in hyperkalemic solution --- p.50 / Chapter 4.5.2 --- Functional changes of BKCa channels in coronary SMCs in hyperkalemia exposure --- p.51 / Chapter 4.5.3 --- Clinical implications --- p.52 / Chapter Chapter 5. --- General Discussion --- p.58 / Chapter 5.1 --- BKCa channels in porcine coronary SMCs --- p.59 / Chapter 5.2 --- Alteration of BKCa function related to ischemia in porcine coronary SMCs --- p.60 / Chapter 5.3 --- Alteration of BKCa function related to hyperkalemia in porcine coronary SMCs --- p.61 / Chapter 5.4 --- Limitation of the study --- p.62 / Chapter 5.5 --- Future investigations --- p.63 / Chapter 5.6 --- Conclusions --- p.63 / References --- p.66

A reconstrução microcirúrgica de faringe e esôfago com jejuno é uma das opções para a reparação de defeitos resultantes de faringolaringectomias. Suas principais vantagens são: o diâmetro da alça jejunal é compatível com o diâmetro das bocas faríngea e esofágica, apresenta menos estenose do que reconstruções cutâneas e há menos contaminação do que quando se emprega o cólon. Entretanto, o pedículo vascular é, por vezes, curto; além disso, as paredes flácidas do intestino delgado e sua secreção mucosa dificultam a adaptação de prótese fonatórias. Finalmente, é necessária uma laparotomia para a obtenção do segmento jejunal, o que aumenta a potencial morbidade operatória. O objetivo deste trabalho foi avaliar de forma retrospectiva os aspectos técnicos, mobi-mortalidade e resultados funcionais de uma série de doentes submetidos a este método reconstrutivo, numa única instituição. No período de 1989 a 2000, 35 pacientes do sexo masculino, com média de idade de 55 anos, foram submetidos à reconstrução faringoesofágica com retalho microcirúrgico de jejuno, no Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo. Trinta e quatro doentes eram portadores de tumores malignos do trato aerodigestivo alto, e um sofreu um ferimento cervical por arma de fogo. Onze casos foram previamente submetidos à radioterapia. A reconstrução foi imediata na maioria dos casos (85,7%). Através de laparotomia mediana supra-umbilical, escolheu-se segmento de alça jejunal de tamanho compatível, situado de 30 a 50 cm do ângulo do Treitz e nutrido por ramos longos dos vasos mesentéricos superiores, atentando-se para preservar a continuidade da arcada vascular primária em todo o segmento a ser transplantado. Este foi transposto para o seu leito definitivo sempre em posição isoperistáltica. Obteve-se um restabelecimento do trânsito digestivo alto em 84,0% dos casos. Houve perda do retalho em 14%, e a taxa de mortalidade foi de 2,9%, ocasionada por abdome agudo obstrutivo. O resultado funcional foi avaliado através de escala de pontuação de Schechter, incluindo parâmetros como deglutição, voz e peso corpóreo. Em 45% dos casos, observou-se uma pontuação entre 5 e 6, evidenciando uma boa qualidade de reabilitação. Em virtude da gravidade dos doentes e da magnitude dos atos operatórios, concluiu-se que a reconstrução faringoesofágica com retalho microcirúrgico jejunal foi um método exeqüível em nosso meio, oferecendo uma boa qualidade de reabilitação funcional, com morbi-mortalidade aceitável / Microsurgical reconstruction of the esophagus and pharynx with a jejunal segment is one of the current options available for repairing defects caused by pharyngolaryngectomies. Main advantages of this technique are: compatible diameters of the jejunal segment with the pharyngeal and esophageal openings, lower incidence of stenosis when compared to cutaneous reconstructions, and less contamination in relation to techniques using colonic fragments. Nevertheless, the vascular pedicle is sometimes too short and the flaccid walls of the jejunum associated with its mucous secretion render adaptation to phonatory prosthesis more difficult. Finally, operative morbidity may be increased due to the need for laparotomy in order to obtain the jejunal segment. The aim of this work was to evaluate, in a retrospective fashion, the technical aspects, morbi-mortality and functional results of a series of patients submitted to this reconstructive method at a single institution. During the period of 1989 to 2000 a total of 35 male patients with an average age of 55 years received a microsurgical flap of the jejunum for pharyngoesophageal reconstruction, at the Hospital das Clínicas of São Paulo University Medical School. Thirty four patients had malignant tumors of the upper aerodigestive tract and one had a injury. Eleven cases had been previously submitted to radiotherapy. The majority of patients (85.7%) underwent reconstruction immediately following ablative surgery. By means of median supraumbilical laparotomy an intestinal segment located 30 to 50 cm away from the angle of Treitz was chosen taking into note that it had to be nourished by long branches of the superior mesenteric vessels and to also maintain its continuity to the primary vascular arcade throughout the segment to be transplanted. The segment was transposed to its definitive vascular bed always respecting an isoperistaltic position. Functional effective restoration of the higher digestive transit was possible in 84.0% of cases. Graft loss occurred in 14%, and the mortality rate was of 2.9%, caused by obstructive acute abdomen. Functional results were evaluated according to the Schechter scoring scale, where parameters such as swallowing, voice and weight are taken into account. In 45% of the cases the scores were between 5 and 6, representing good repairing quality. Considering the degree of severity of these patients and the magnitude of the surgical procedures, we concluded that pharyngoesophageal reconstruction utilizing microsurgical jejunal flaps is a feasible method with good functional rehabilitation results and acceptable morbidity and mortality rates for our patient population