Página 1 dos resultados de 176034 itens digitais encontrados em 0.069 segundos

Analysis of the blood flow behavior through microchannels by a confocal micro-PIV/PTV system

Lima, R.
Fonte: Tohoku University Publicador: Tohoku University
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
36.13%
Over the years, various experimental methods have been applied in an effort to understand the blood flow behavior in microcirculation. Most of our current knowledge in microcirculation is based on macroscopic flow phenomena such as Fahraeus effect and Fahraeus-Linqvist effect. The development of optical experimental techniques has contributed to obtain explanations on the way the blood flows through microvessels. Although the past results have been encouraging, detailed studies on the flow properties of blood in the microcirculation has been limited by several technical factors such as poor spatial resolution and difficulty to obtain quantitative detailed measurements at such small scales. Therefore, there is still a lack of knowledge on the microscale flow behavior of blood cells through microvessels. In recent years, due to advances in computers, optics, and digital image processing techniques, it has become possible to combine a particle image velocimetry (PIV) system with a conventional microscope. As a result, this combination, known as a micro-PIV, has greatly increased the resolution of the conventional PIV. Although the conventional micro-PIV technique has proven to be useful in measuring the flow behavior in microfluidics devices...

Blood pressure measurements taken by patients are similar to home and ambulatory blood pressure measurements

PIERIN, Angela M. G.; IGNEZ, Edna C.; JACOB FILHO, Wilson; BARBATO, Alfonso Júlio Guedes; MION JR., Décio
Fonte: Faculdade de Medicina / USP Publicador: Faculdade de Medicina / USP
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
36.15%
OBJECTIVE: To compare blood pressure measurements taken at home by physicians, nurses, and patients with office blood pressure measurement , ambulatory blood pressure monitoring and home blood pressure measurement. METHODS: A total of 44 patients seen by a home care program were studied. Protocol 1 a) blood pressure was measured by the patient, a physician and a nurse during a regular home visit (Home1); b) home blood pressure measurement was measured for 4 days (HBPM1); c) office blood pressure measurement was measured by a physician, a nurse, and the patient; and by 24-hour ambulatory blood pressure monitoring. Protocol 2 blood pressure was measured by the patient, a physician, and a nurse during a special home visit in the presence of a physician and a nurse only (Home2); and b) home blood pressure measurement was taken for the second time (HBPM2). Echocardiography, guided by a two-dimensional echocardiograph, was performed. RESULTS: Protocol 1: a) office blood pressure measurement and Home1 were significantly higher than ambulatory blood pressure monitoring, except for systolic and diastolic office blood pressure measurement taken by the patient or a family member, systolic blood pressure taken by a nurse, and diastolic blood pressure taken by a physician. b) ambulatory blood pressure monitoring and HBPM1 were similar. Protocol 2: a) HBPM2 and Home2 were similar. b) Home2 was significantly lower than Home1...

Influência da contaminação com sangue e de diferentes agentes de limpeza na adesão de um sistema autocondicionante aos tecidos dentais; Blood contamination and cleaning substances influence on adhesion

Tachibana, Arlene
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 04/08/2008 Português
Relevância na Pesquisa
36.12%
A presença de lesões de cárie localizadas em áreas de difícil acesso para realização de isolamento absoluto torna a contaminação do campo operatório um fator de grande importância para o sucesso de uma restauração adesiva, apesar da grande variedade de sistemas adesivos de uso simplificado existentes atualmente no mercado odontológico. Os estudos que envolvem contaminação por sangue existentes na literatura expõem diferentes métodos de manipulação do contaminante, quanto a adição ou não de um anticoagulante bem como quanto a possibilidade de armazenamento deste. Este trabalho teve como objetivo avaliar, através do ensaio de microcisalhamento, a metodologia mais adequada para obtenção, manipulação do sangue e a eficiência de diferentes substâncias de uso corrente no consultório odontológico para remoção do contaminante de uma superfície dental. No experimento 1 deste trabalho, 6 dentes foram seccionados ao meio, no sentido do longo eixo e distribuídos em grupos, de acordo com o período de armazenamento do sangue heparinizado (0 hora, 24 horas, 7 dias) utilizado para contaminá-los previamente a aplicação do sistema adesivo autocondicionante de passo único (Clearfill S3 Bond). No expermiento 2...

Uso da medida da pressão em casa como estratégia de controle da pressão arterial de um grupo de hipertensos  de Peruíbe - SP; Use of home blood pressure measurement as a control strategy in a group of hypertensive patients from Peruibe SP

Silva, Giane Christina Alves da
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 29/11/2010 Português
Relevância na Pesquisa
36.11%
Introdução: a falta de controle dos hipertensos tem sido um desafio para os profissionais de saúde, e a medida da pressão em casa pode ser um recurso para aumentar o controle da pressão arterial. Realizou-se um estudo para avaliar o efeito do uso da medida da pressão em casa no controle da pressão arterial em um grupo de hipertensos. Objetivos: avaliar o efeito do uso da medida da pressão em casa no controle da pressão arterial em grupo de hipertensos do Município de Peruibe SP. Objetivos específicos: 1- comparar o controle da pressão arterial dos hipertensos submetidos à medida da pressão em casa; 2- avaliar o controle da pressão arterial dos hipertensos, considerando a monitorização residencial da pressão (MRPA) como método de avaliação pré e pós-medida da pressão em casa; 3- identificar associações entre o controle da pressão arterial com as variáveis biopsicossociais, hábitos de vida, comportamentos e atitudes frente à doença e tratamento; 4- avaliar adesão ao tratamento utilizando o questionário Fatores Dificultadores da Adesão (FDA) e o teste de Morisky e Green. Casuística e Método: pesquisa de campo, longitudinal, pareada com abordagem quantitativa. Os participantes realizaram a medida da pressão arterial em consultório no início e final do estudo. A medida da pressão em casa foi realizada com aparelho automático...

Concentrações salivares, sanguíneas e plasmáticas de Óxido Nítrico em pacientes com Doença Periodontal antes e depois do tratamento periodontal não cirúrgico; Salivary, blood and plasma concentrations of nitric oxide in patients with periodontal disease before and after non-surgical periodontal treatment

Zuardi, Leonardo Raphael
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 11/05/2012 Português
Relevância na Pesquisa
36.12%
O Óxido Nítrico (NO) faz parte de uma família de radicais livres que está envolvida em várias funções do organismo como controle cardiovascular, homeostase, formação óssea, neurotransmissão e funções imunológicas. Tem sido descrito que o NO atuaria na resposta de defesa do hospedeiro frente à infecção dos tecidos orais. Por outro lado, tem sido descrito também que quantidades excessivas de NO podem contribuir para a destruição tecidual na periodontite. Além destes aspectos muito importantes na boca, o NO é uma das moléculas de maior importância para a saúde humana, pois a sua liberação pelo endotélio dos vasos é um componente fundamental para o controle da pressão arterial. Já foi demonstrado que bactérias comensais da boca seriam responsáveis pela produção de nitritos que, no estômago, seriam convertidos a NO e este absorvido. Como as quantidades de nitrito na saliva são cerca de mil vezes maiores do que aquelas detectadas no sangue total, acredita-se que o nitrito da saliva possa ter repercussão no NO do sangue total e possivelmente possa também ter algum efeito na regulação de eventos sistêmicos, como a própria pressão arterial. O número de trabalhos sobre NO na saliva encontrados na literatura científica de língua inglesa não soma 2 dezenas...

Estruturação e padronização do banco de sangue para felinos no hospital veterinário da Universidade de São Paulo; Structuring and standardization of feline blood bank at the veterinary hospital of São Paulo University

Botteon, Karin Denise
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 18/12/2012 Português
Relevância na Pesquisa
36.14%
Nos últimos anos, registra-se um importante crescimento da população felina no Brasil semelhante ao que vem ocorrendo nos países desenvolvidos. Desta forma, houve uma elevação considerável do diagnóstico de doenças oncológicas e infecciosas em decorrência da maior sobrevida desta espécie. Consequentemente, os casos de anemias, coagulopatias e hipoproteinemias vem aumentando acompanhando esta evolução requisitando como tratamento suporte a transfusão sanguínea. As pesquisas na área de medicina transfusional nesta espécie são escassas no Brasil com ausência de artigos que documentem a implantação de bancos de sangue. Assim sendo, o projeto teve como objetivos: a viabilização do banco de sangue de gatos com a comparação de três métodos de coleta de bolsas de sangue em doadores felinos em sistema fechado, determinação dos grupos sanguíneos de raças puras e sem raça definidas de gatos domésticos mais comuns no Estado de São Paulo e avaliação do protocolo de sedação para doadores felinos. Para determinação do método de coleta foram empregados 45 gatos doadores de diferentes raças distribuídos aleatoriamente em três grupos de 15 animais cada. Nos animais do Grupo 1 a coleta de sangue foi realizada através de "kit" comercial importado com sistema de seringa; no Grupo 2 a coleta de sangue foi realizada pelo método gravitacional empregando-se para tanto bolsas de sangue manufaturadas a partir de bolsas destinadas a transferência de sangue humano e no Grupo 3 empregou-se a mesma metodologia do Grupo 2...

Casuistic of related blood donations incidents in HPFF Blood Department

Barra, A; Barradas, A; Gil, A; Costa, C; Silva, I; Rebelo, S; Simões, A; Rodrigues, T; Moura, H; Santos, L; Soares, F
Fonte: International Society for Blood Transfusion Publicador: International Society for Blood Transfusion
Tipo: Conferência ou Objeto de Conferência
Publicado em //2010 Português
Relevância na Pesquisa
46.07%
Background Related blood donations incidents (RBDI) have to be reported to the Portuguese Haemovigilance Blood Group since de last year. In our department we have a manual system of incidents registration since 2006. We understand how is important the analysis of this data to prevent future incidents. Aims We want in some way to share our results aimed a better prevention of this incidents. Methods Data of RBDI between March of 2006 and December of 2009. This register include date, ID, age, sex, weight, time of incidents in relation to donation, donation status (first-time vs. repeat), type of incidents, the time window between last meal and donation. Measures to ease RBDI, past donor history and haemoglobin value before donation (g/dl). Results Between March of 2006 and December of 2009 we have registered 122 (0.60%) RDBI, in a total of 20067 allogeneic donations, 68.58% donations from men and 31.42% from women. RBDI were 70 in men (0.50% of male donations) and 52 in women (0.82% of female donations). The age of studied donors ranged between 19 and 62 ears old with an average of 32.21 ears (19-30 - 34.43%; 31-40 - 25,4%; 41-50 - 16,4%; 50-62 - 13,1%) . The average of weight was 70.1 Kilos. We found 96.2% of early RBDI (< 1h) and 3.8% were late (> 1h). RBDI was verified in 20 first time donors...

Prevalence of HLA antibodies in post pregnancies female blood donors

Barra, A; Barradas, A; Cardoso, E; Costa, C; Fontes, A; Gil, A; Oliveira, C; Ramalhete, L; Rodrigues, T; Sancho, MR; Silva, I; Simões, A; Trindade, H
Fonte: International Society for Blood Transfusion Publicador: International Society for Blood Transfusion
Tipo: Conferência ou Objeto de Conferência
Publicado em //2011 Português
Relevância na Pesquisa
45.99%
Background: Transfusion related acute lung injury (TRALI) is known as transfusion hazard with high morbidity and mortality rate. Mainly HLA class II have been associated with TRALI. Preventive measures are in the exclusion of donor female as they carry any these antibodies. Aim: We study a group of female blood donor with prior history of two or more pregnancies (G2), one (G1) pregnancy and without any pregnancy (G0) for detection of HLA antibodies. Methods: We collected a total of 108 samples between September and December of 2010 (G2-56; G1-19 and G0-33 samples). For detection of HLA antibodies we used the LABScreen Mixed Assay which is multiplex technique that detects anti HLA Class I and II 1gG antibodies. Microparticles (beads) are coated with HLA antigens. Those beads have a combination of two dyes, and for each set of beads the dyes proportions are different so that the bead sets can be distinguished. Positivity was defined when the ratio is equal or higher than 4. Results: In the totality of the 108 study samples we found positivity for HLA class I antibodies in 22% (G2-32%, G1-26%, G0-3%) and for HLA class II antibodies in 17% of samples (G2-27%, G1-5%, and G0-6%). Positivity for both HLA class I and II antibodies was found only in G2 samples (18%) and G1 samples (5%). Our study also shows a 12% of positivity only for HLA class I antibodies (G2-14%...

Association of anti-HBc seropositivity with undetectable or low level anti-HBs (<100) in anti-HCV positive blood donor population.

Barradas, A; Barra, A; Baptista, F; Soares, F; Gaspar, R; Venâncio, B; Pereira, T
Fonte: International Society for Blood Transfusion Publicador: International Society for Blood Transfusion
Tipo: Conferência ou Objeto de Conferência
Publicado em //2002 Português
Relevância na Pesquisa
45.92%
In this data we observed the association between confirmed. Anti-HCV positive and Anti-HBc positive with low level (<100) or undetectable Anti-HBs. b) ./. c) Between May 1995 to December 2001 we collected and analysed 24989 samples from volunteer blood donors. In this samples we performed the following tests Anti?HCV (Ortho), confirmed for PCR (Roche) or RIBA (Innogenetics), Anti-HBc (Dade-Behreing/Abbott, Anti-HBs (Abbott) and HCV genotype (Innogenetics). d) We found between Anti-HCV neg. population 6,94% positives Anti-HBc and 25,65% of them was Anti-HBs low level or undetectable. In the population we found 0,148% of confirmed Anti-HCV reactive donors, among them we found 51,35% of Anti-HBc positivity and between the last ones 78,9% had low level or undetectavel Anti-HBs. The ALT average level in the Anti-HCV positive donors was: Anti-HBc negative donors: 140,28 Ani-HBc positives with high level of Anti-HBs: 50,48 Anti-HBc positives with low or undetectable level of Anti-HBs: 64,11 e) The Anti-HCV confirmed donors associated to the Anti-HBc positives with low level or undetectable Anti-HBs (78,9%). Comparing with the Anti-HCV negative donors, positive for Anti?HBc and with low level or undetectable Anti-HBs (25,65%). This is statistically relevant.

A retrospective study of B19 positive antigen blood donations

Mercês, A; Estevens, A; Barradas, A; Barra, A; Baptista, F; Soares, F
Fonte: International Society for Blood Transfusion Publicador: International Society for Blood Transfusion
Tipo: Conferência ou Objeto de Conferência
Publicado em //2001 Português
Relevância na Pesquisa
46.08%
Between August and December 2000 using ID-Parvovirus B19 – DiaMed, we studied 708 blood donations to detect b19 Ag on the plasma kept in our serum colletion, we found a prevalence of 0,424% positive donations. Globoside, a P blood group antigen, is the major red blood cell receptor used by b19 for attachment and entry into the cell. This is why we have included it in our study. We performed the retrospective study in this blood components: Obtained results in blood donors (see poster). Obtained results of transfused patients with blood components from those donors (see poster). Conclusions: As it is possible to see in our results, one of the patients was infected recently by one blood unit. Our objective is not to transfuse this positive blood components to patients in risk, like individuals with underlying haemolytic disorders, immunocompromised patients, immunodeficient individuals, pregnant women, fetus and newborns. Other measures may be implemented, like: deferral permanently those donors, or researche P Ag in all patients?

Haematological and biochemical characteristics of the splenic effluent blood in schistosomal patients undergoing splenectomy

Petroianu,Andy; Buzatti,Kelly Cristine de Lacerda Rodrigues; Resende,Vivian; Sabino,Kelly Renata
Fonte: Colégio Brasileiro de Cirurgiões Publicador: Colégio Brasileiro de Cirurgiões
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2014 Português
Relevância na Pesquisa
36.13%
OBJECTIVE: To assess hematological and biochemical features of splenic effluent blood and their influence on the rise of hematological values after splenectomy. METHODS: we studied 20 patients undergoing surgical treatment for schistosomatic portal hypertension. We collected blood samples for CBC, coagulation, bilirubin and albumin in the splenic vein (perioperative) and peripheral blood (immediately pre and postoperative periods). RESULTS: the splenic blood showed higher values of red blood cells, hemoglobin, hematocrit, platelet count, total leukocytes, neutrophils, lymphocytes, monocytes, eosinophils and basophils, as well as reduction of laboratory coagulation parameters in relation to peripheral blood collected preoperatively. In the postoperative peripheral blood there was an increase in the overall leukocytes and in their neutrophil component, and decreased levels of basophils, eosinophils and lymphocytes. The other postoperative variables of complete blood count and coagulation tests were not different compared with the splenic blood. The albumin values were lower postoperatively when compared to preoperative and splenic blood. There were higher values of direct bilirubin in the postoperative period when compared with the preoperative and splenic blood. Postoperative indirect bilirubin was lower compared to its value in the splenic blood. CONCLUSION: hematological and biochemical values of splenic effluent blood are higher than those found in peripheral blood in the presence of schistosomal splenomegaly. However...

Iron deficiency in blood donors

Cançado,Rodolfo Delfini; Chiattone,Carlos Sérgio; Alonso,Fausto Forin; Langhi Júnior,Dante Mário; Alves,Rita de Cássia Silva
Fonte: Associação Paulista de Medicina - APM Publicador: Associação Paulista de Medicina - APM
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/07/2001 Português
Relevância na Pesquisa
36.11%
CONTEXT: Blood donation results in a substantial loss of iron (200 to 250 mg) at each bleeding procedure (425 to 475 ml) and subsequent mobilization of iron from body stores. Recent reports have shown that body iron reserves generally are small and iron depletion is more frequent in blood donors than in non-donors. OBJECTIVE: The aim of this study was to evaluate the frequency of iron deficiency in blood donors and to establish the frequency of iron deficiency in blood donors according to sex, whether they were first-time or multi-time donors, and the frequency of donations per year. DESIGN: From September 20 to October 5, 1999, three hundred blood donors from Santa Casa Hemocenter of São Paulo were studied. DIAGNOSTIC TESTS: Using a combination of biochemical measurements of iron status: serum iron, total iron-binding capacity, transferrin saturation index, serum ferritin and the erythrocyte indices. RESULTS: The frequency of iron deficiency in blood donors was 11.0%, of whom 5.5% (13/237) were male and 31.7% (20/63) female donors. The frequency of iron deficiency was higher in multi-time blood donors than in first-time blood donors, for male blood donors (7.6% versus 0.0%, P < 0.05) and female ones (41.5% versus 18.5%, P < 0.05). The frequency of iron deficiency found was higher among the male blood donors with three or more donations per year (P < 0.05) and among the female blood donors with two or more donations per year (P < 0.05). CONCLUSIONS: We conclude that blood donation is a very important factor for iron deficiency in blood donors...

Blood pressure measurements taken by patients are similar to home and ambulatory blood pressure measurements

Pierin,Angela M. G.; Ignez,Edna C.; Jacob Filho,Wilson; Barbato,Alfonso Júlio Guedes; Mion Jr.,Décio
Fonte: Faculdade de Medicina / USP Publicador: Faculdade de Medicina / USP
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2008 Português
Relevância na Pesquisa
36.15%
OBJECTIVE: To compare blood pressure measurements taken at home by physicians, nurses, and patients with office blood pressure measurement , ambulatory blood pressure monitoring and home blood pressure measurement. METHODS: A total of 44 patients seen by a home care program were studied. Protocol 1 a) blood pressure was measured by the patient, a physician and a nurse during a regular home visit (Home1); b) home blood pressure measurement was measured for 4 days (HBPM1); c) office blood pressure measurement was measured by a physician, a nurse, and the patient; and by 24-hour ambulatory blood pressure monitoring. Protocol 2 blood pressure was measured by the patient, a physician, and a nurse during a special home visit in the presence of a physician and a nurse only (Home2); and b) home blood pressure measurement was taken for the second time (HBPM2). Echocardiography, guided by a two-dimensional echocardiograph, was performed. RESULTS: Protocol 1: a) office blood pressure measurement and Home1 were significantly higher than ambulatory blood pressure monitoring, except for systolic and diastolic office blood pressure measurement taken by the patient or a family member, systolic blood pressure taken by a nurse, and diastolic blood pressure taken by a physician. b) ambulatory blood pressure monitoring and HBPM1 were similar. Protocol 2: a) HBPM2 and Home2 were similar. b) Home2 was significantly lower than Home1...

Untersuchung über die Wertigkeit der Flussmessung mittels MRT in den Nierenarterien zur Beurteilung der seitengetrennten Nierendurchblutung bei Patienten mit Nierenarterienstenose. Ein Vergleich zur Nierenfunktionsszintigraphie; Evaluation of a new MRI-method for blood flow in renal artery stenosis. Comparisons with measurements of kidney function by clearance method and by scintigraphy

Giersch, Jenny Yuhko
Fonte: Universidade de Tubinga Publicador: Universidade de Tubinga
Tipo: Dissertação
Português
Relevância na Pesquisa
36.13%
Fragestellung. Es sollte untersucht werden, inwieweit die MR-Phasenkontrast-flussmessung ohne Kontrastmittel als nicht-invasive und nicht-nephrotoxische Methode zur Beurteilung der seitengetrennten Nierendurchblutung bei Nierenarterienstenose (NAS) und zur Detektion einer NAS im Vergleich zur Nierenfunktionsszintigraphie geeignet ist. Methoden. MR-Blutflussmessung in den Nierenarterien (nMR-Fluss) bei 13 Hypertonikern mit NAS (46-71 Jahre) und 6 Hypertonikern ohne Stenose (29-63 Jahre). Bei 12 Patienten mit NAS zusätzlich Bestimmung der Technetium-99m-MAG-3-Clearance jeder Niere durch Nierenfunktionsszintigraphie ohne Captopril und Berechnung des seitengetrennten effektiven renalen Blutflusses (ERB). Korrelation von nMR-Fluss, MAG3-Clearance und ERB. Prüfung auf signifikante Unterschiede zwischen NAS-Gruppe 1 (NAS = 0-29%, n = 21), NAS-Gruppe 2 (NAS = 30-69%, n = 8) und NAS-Gruppe 3 (NAS = 70-100%, n = 6) für alle Methoden. Bestimmung der Genauigkeit von nMR-Fluss, MAG3-Clearance und ERB zur Detektion einer NAS > / = 70% mit ROC-Kurve. Vergleich zwischen Ergebnissen von Patienten, die einen ACE-Hemmer und / oder AT2-Rezeptorantagonisten eingenommen hatten, und denen von übrigen Patienten. Vergleich zwischen Ergebnissen unter Einschluss aller Patienten und nach Ausschluss von chronischer Niereninsuffizienz (CN) (n = 6 Patienten). Bestimmung von weiteren klinischen Parametern: Alter...

Role of the gastrointestinal tract in postprandial blood pressure regulation

Gentilcore, Diana
Fonte: Universidade de Adelaide Publicador: Universidade de Adelaide
Tipo: Tese de Doutorado Formato: 219729 bytes; 2663042 bytes; 1359269 bytes; 286911 bytes; application/pdf; application/pdf; application/pdf; application/pdf
Publicado em //2006 Português
Relevância na Pesquisa
36.15%
This thesis presents studies relating to the role of the gastrointestinal tract in postprandial blood pressure regulation. The areas that have been addressed include : ( i ) the methodological approaches to the evaluation of gastric emptying, blood pressure, splanchnic blood flow, intraluminal manometry and gut hormones and ( ii ) the pathophysiological mechanisms underlying postprandial hypotension, with a particular focus on ' gastric ' and ' small intestinal ' mechanisms and their potential therapeutic relevance. All of the studies have been either published or manuscripts have been prepared for publication. While scintigraphy represents the ' gold standard ' for the measurement of gastric emptying, recent studies suggest that three - dimensional ( 3D ) ultrasonography may also allow a precise measure of gastric emptying. Concurrent scintigraphic and ultrasonographic measurements of gastric emptying of liquids were performed in healthy young volunteers. There was a good correlation and agreement between scintigraphic measurements of gastric emptying and 3D ultrasonography after ingestion of both low - and high - nutrient drinks, indicating that 3D ultrasonography, provides a valid measure of gastric emptying of liquid meals in normal subjects. Postprandial hypotension...

Avaliação da segurança de dois protocolos anestésicos e da eficácia de dois métodos indiretos de aferição da pressão arterial para colheita de sangue total em gatos; Evaluation of the safety of two anesthetic protocols and efficiency of two indirect methods of arterial pressure measurement for collection of whole blood in cats

Martins, Sarah Barboza
Fonte: Universidade Federal de Goiás; Brasil; UFG; Programa de Pós-graduação em Ciência Animal (EVZ); Escola de Veterinária e Zootecnia - EVZ (RG) Publicador: Universidade Federal de Goiás; Brasil; UFG; Programa de Pós-graduação em Ciência Animal (EVZ); Escola de Veterinária e Zootecnia - EVZ (RG)
Tipo: Dissertação Formato: application/pdf
Português
Relevância na Pesquisa
36.12%
The availability of blood products for cats is low, with one of the determining factors the requirement of sedation or anesthesia for blood collection. The blood pressure measurement is routine in clinical and anesthesiology, and may be used either the indirect methods, with easy implementation and low risk to the animals, or the direct method, more reliable. This study evaluated the safety of two anesthetic protocols and accuracy of two methods of indirect blood pressure measurement for blood collection in cats. We used five animals weighing 4.3 ± 0.5 kg submitted to two different anesthetic protocols at intervals of 30 days. For the femoral artery and jugular vein catheterization, the animals were anesthetized with isoflurane. Thirty minutes after end of instrumentation, anesthesia was again induced and maintained either with isoflurane (GI) or ketamine (10 mg/kg) and midazolam (0.2 mg / kg) (GCM) IM. After that we collected the whole blood (53mL) and replaced volume with ringer's lactate solution (20 mL / kg), and then allowed the anesthetic recovery. We analyzed the cardiac (FR) and respiratory (f) rate, the systolic (PAS), diastolic (PAD) and mean (PAM) arterial pressure with direct and oscillometric method, and PAS with Doppler ultrasound; oxyhemoglobin saturation ( SpO2) and central venous pressure (PVC). It were also collected arterial blood samples for analysis of blood gases and electrolytes. Animals were evaluated before induction to blood collection (T0)...

Acute aerobic exercise reduces 24-h ambulatory blood pressure levels in long-term-treated hypertensive patients

CIOLAC, Emmanuel G.; GUIMARÃES, Guilherme V.; D´ÁVILA, Veridiana M.; BORTOLOTTO, Luiz A.; DORIA, Egídio L.; BOCCHI, Edimar A.
Fonte: Faculdade de Medicina / USP Publicador: Faculdade de Medicina / USP
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
36.12%
BACKGROUND: Even with anti-hypertensive therapy, it is difficult to maintain optimal systemic blood pressure values in hypertensive patients. Exercise may reduce blood pressure in untreated hypertensive, but its effect when combined with long-term anti-hypertensive therapy remains unclear. Our purpose was to evaluate the acute effects of a single session of aerobic exercise on the blood pressure of long-term-treated hypertensive patients. METHODS: Fifty treated hypertensive patients (18/32 male/female; 46.5±8.2 years; Body mass index: 27.8±4.7 kg/m²) were monitored for 24 h with respect to ambulatory (A) blood pressure after an aerobic exercise session (post-exercise) and a control period (control) in random order. Aerobic exercise consisted of 40 minutes on a cycle-ergometer, with the mean exercise intensity at 60% of the patient's reserve heart rate. RESULTS: Post-exercise ambulatory blood pressure was reduced for 24 h systolic (126±8.6 vs. 123.1±8.7 mmHg, p=0.004) and diastolic blood pressure (81.9±8 vs. 79.8±8.5 mmHg, p=0.004), daytime diastolic blood pressure (85.5±8.5 vs. 83.9±8.8 mmHg, p=0.04), and nighttime S (116.8±9.9 vs. 112.5±9.2 mmHg, p<0.001) and diastolic blood pressure (73.5±8.8 vs. 70.1±8.4 mmHg, p<0.001). Post-exercise daytime systolic blood pressure also tended to be reduced (129.8±9.3 vs. 127.8±9.4 mmHg...

Bartonella spp. e o risco potencial de transmissão por transfusão sanguínea = : Bartonella spp. and the potential risk of transmission by blood transfusion; Bartonella spp. and the potential risk of transmission by blood transfusion

Luiza Helena Urso Pitassi
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 23/05/2013 Português
Relevância na Pesquisa
36.13%
O gênero Bartonella constitui um grupo de patógenos zoonóticos re-emergentes e negligenciados que têm sido associados a um amplo espectro de doenças humanas graves. As Bartonella spp. são bacilos gram-negativos que infectam hemácias e células endoteliais, que podem causar infecção crônica ou mesmo fatal. As bartoneloses humanas mais conhecidas são a doença de Carrión, febre das trincheiras, doença da arranhadura do gato e angiomatose bacilar. Como existem espécies de Bartonella intraeritrocitárias e que podem causar infecção persistente e assintomática em humanos, objetivou-se avaliar o risco potencial de transmissão de Bartonella spp. por transfusão sanguínea. No primeiro estudo, os eritrócitos humanos foram infectados com B. henselae em 30 min e 1, 5, 10, e 72 h para a avaliação ultraestrutural por microscopia eletrônica de transmissão (ME). A B. henselae foi vista aderida a eritrócitos humanos 10 h após a inoculação e no interior de eritrócitos após 72 h. A localização intraeritrocitária de B. henselae havia sido mostrada em eritrócitos de gatos, mas nunca antes identificada em eritrócitos humanos. Foi realizado um segundo estudo para determinar as características ultraestruturais da Bartonella spp. nas células do sangue...

Acute aerobic exercise reduces 24-h ambulatory blood pressure levels in long-term-treated hypertensive patients

Ciolac,Emmanuel G.; Guimarães,Guilherme V.; D´Ávila,Veridiana M.; Bortolotto,Luiz A.; Doria,Egídio L.; Bocchi,Edimar A.
Fonte: Faculdade de Medicina / USP Publicador: Faculdade de Medicina / USP
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2008 Português
Relevância na Pesquisa
36.12%
BACKGROUND: Even with anti-hypertensive therapy, it is difficult to maintain optimal systemic blood pressure values in hypertensive patients. Exercise may reduce blood pressure in untreated hypertensive, but its effect when combined with long-term anti-hypertensive therapy remains unclear. Our purpose was to evaluate the acute effects of a single session of aerobic exercise on the blood pressure of long-term-treated hypertensive patients. METHODS: Fifty treated hypertensive patients (18/32 male/female; 46.5±8.2 years; Body mass index: 27.8±4.7 kg/m²) were monitored for 24 h with respect to ambulatory (A) blood pressure after an aerobic exercise session (post-exercise) and a control period (control) in random order. Aerobic exercise consisted of 40 minutes on a cycle-ergometer, with the mean exercise intensity at 60% of the patient's reserve heart rate. RESULTS: Post-exercise ambulatory blood pressure was reduced for 24 h systolic (126±8.6 vs. 123.1±8.7 mmHg, p=0.004) and diastolic blood pressure (81.9±8 vs. 79.8±8.5 mmHg, p=0.004), daytime diastolic blood pressure (85.5±8.5 vs. 83.9±8.8 mmHg, p=0.04), and nighttime S (116.8±9.9 vs. 112.5±9.2 mmHg, p<0.001) and diastolic blood pressure (73.5±8.8 vs. 70.1±8.4 mmHg, p<0.001). Post-exercise daytime systolic blood pressure also tended to be reduced (129.8±9.3 vs. 127.8±9.4 mmHg...

Blood pressure measurements taken by patients are similar to home and ambulatory blood pressure measurements

Pierin, Angela M. G.; Ignez, Edna C.; Jacob Filho, Wilson; Barbato, Alfonso Júlio Guedes; Mion Jr., Décio
Fonte: Universidade de São Paulo. Faculdade de Medicina Publicador: Universidade de São Paulo. Faculdade de Medicina
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; Formato: application/pdf
Publicado em 01/01/2008 Português
Relevância na Pesquisa
36.15%
OBJECTIVE: To compare blood pressure measurements taken at home by physicians, nurses, and patients with office blood pressure measurement , ambulatory blood pressure monitoring and home blood pressure measurement. METHODS: A total of 44 patients seen by a home care program were studied. Protocol 1 a) blood pressure was measured by the patient, a physician and a nurse during a regular home visit (Home1); b) home blood pressure measurement was measured for 4 days (HBPM1); c) office blood pressure measurement was measured by a physician, a nurse, and the patient; and by 24-hour ambulatory blood pressure monitoring. Protocol 2 blood pressure was measured by the patient, a physician, and a nurse during a special home visit in the presence of a physician and a nurse only (Home2); and b) home blood pressure measurement was taken for the second time (HBPM2). Echocardiography, guided by a two-dimensional echocardiograph, was performed. RESULTS: Protocol 1: a) office blood pressure measurement and Home1 were significantly higher than ambulatory blood pressure monitoring, except for systolic and diastolic office blood pressure measurement taken by the patient or a family member, systolic blood pressure taken by a nurse, and diastolic blood pressure taken by a physician. b) ambulatory blood pressure monitoring and HBPM1 were similar. Protocol 2: a) HBPM2 and Home2 were similar. b) Home2 was significantly lower than Home1...