Strength training with and without arteriovenous blood flow restriction improves performance, regardless of changes in muscle hypertrophy, in Wistar rats.

Strength training (ST) with blood flow restriction (BFR) is known to promote increases in hypertrophy and strength sometimes similar to traditional ST despite the effects of the arterial BFR on muscle adaptations and safety are not well established. The aim of this study was to assess whether ST with arterial BFR is able to improve muscular adaptations, performance and its safety in Wistar rats. Animals aging 8 weeks were divided in four groups: sedentary sham (S/S), sedentary with arterial BFR (S/BFR), trained sham (T/S), and trained with arterial BFR (T/BFR). Training protocol consisted of four weeks of ST composed by six sets of 10 ladder climbing with 50% of 1 maximal voluntary contraction. Body weight, epididymal fat, maximum loaded weight, manual grip strength, muscular hypertrophy index, systolic blood pressure, enzyme activity of superoxide dismutase, nitrite/nitrate concentration and tumor necrosis factor alpha were analyzed. The BFR rate was between 36% and 38%. T/BRF was effective to promote strength and hypertrophy. T/S is an alternative to improve strength, but it did not promote hypertrophy. Furthermore, we found no significant cardiac and metabolic changes. Thus, T/BFR is able to improve muscle adaptations and performance in rats, without causing cardiovascular and metabolic damage.

Guia prático para o manejo da anafilaxia-2012 / Practical guide to the management of anaphylaxix-2012

Anafilaxia representa uma das mais dramáticas condições clínicas da medicina, tanto pela imprevisibilidade de aparecimento quanto pelo potencial de gravidade na sua evolução. A ocorrência de anafilaxia determina enorme impacto na qualidade de vida das pessoas afetadas, dos seus familiares, cuidadores e amigos. As principais causas de anafilaxia são medicamentos, alimentos e veneno de insetos. Estudos epidemiológicos recentes sugerem aumento da incidência de anafilaxia. Aprofundar o conhecimento de causas e mecanismos de anafilaxia tem sido preocupação constante da especialidade de Imunoalergologia. Nos ambulatórios de Alergia e Imunologia Clínica são atendidas com regularidade pessoas que sofreram reações alergicas agudas graves e que necessitam de orientação especializada. Não é raro verificar que muitas superaram vários episódios agudos sem receber o diagnóstico correto, assim como a orientação específica para procurar atendimento especializado. Cada reação anafilática representa risco, que é variavel dependendo das caracteristicas do paciente e do agente desencadeante. A falta de informação de médicos e pacientes contribui para aumentar a chance de novas ocorrências, expondo estes a riscos muitas vezes preveníveis. O Guia Prático para o Manejo da Anafilaxia-2012 tem o objetivo de difundir o conhecimento sobre anafilaxia entre médicos e profissionais da saúde, pacientes, familiares, professores, escolas e autoridades de saúde pública. Este documento não é um protocolo de atendimento a pacientes com reações anafiláticas, nem pretende formular rotinas clínicas ou interferir na autonomia e no discernimento do médico ao avaliar e orientar pacientes que estão aos seus cuidados. O documento contém de forma muito concisa o conhecimento atual sobre o tema e a experiência pessoal de especialistas no manejo dessas situações, fornecendo informação para o aprimoramento pessoal. Aborda-se o diagnóstico e tratamento emergencial da anafilaxia, assim como, a avaliação e o tratamento após a crise. Cuidados básicos e atitudes preventivas que são fundamentais na orientação de pacientes e familiares são analisadas.

Anaphylaxis is one of the most dramatic clinical conditions of Medicine, by the unpredictability of emergence and by the potential of severity in its evolution. Anaphylaxis determines an enormous impact on the quality of life of people affected, their families, caregivers and friends. The most frequent cause of anaphylaxis are drugs, foods, and stinging insect venoms. Recent epidemiological surveys have suggested increased incidence of anaphylaxis. Development of the knowledge of the causes and mechanisms of anaphylaxis has been a constant concern of the specialist of Immunoallergology. In Allergy and Clinical Immunology clinics are frequent to consult people who have suffered severe acute allergic reactions that require expert guidance. Many patients had suffered previous episodes without receiving the correct diagnosis as well as specific guidance to seek specialized care. Each allergic crisis represents a health risk, which is variable depending on the characteristics of the patient and the triggering agent. The lack of information from doctors and patients contributes to increase the chance of new episodes, exposing patients to preventable risk. The Practical Management of Anaphylaxis-2012 aims to spread knowledge of anaphylaxis among physicians, healthcare professionals, patients, families, teachers, schools, and public health authorities. This document is not a protocol of care to patients with anaphylactic reactions, nor is it intended to formulate practical clinical routines and, its objective should not interfere with the autonomy and the discernment of the physician to evaluate and treat patients who are to their care. The document contains very concisely the current knowledge about the subject and the personal experience of specialists in the management of these situations, providing information for personal improvement. Deals with the diagnosis and emergency treatment of anaphylaxis, as well as the assessment and treatment after the crisis. Basic and preventive care who are fundamental attitudes for patients and families are analyzed.