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ABSTRACT Objective: To investigate the efficacy of upper limb exercise training (ULExT) in improving the performance of activities of daily living (ADL) that involve the upper limbs (UL) in patients with COPD. Methods: The Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines were used in this systematic review. PubMed and EBSCOhost databases were searched to identify randomized controlled trials involving adults with COPD who underwent ULExT, compared with those who underwent other types of exercise or no exercise, in order to assess the performance of ADL that involve the UL. The methodological quality of the selected studies was assessed using the Physiotherapy Evidence Database scale. Results: Five studies, with a total sample of 173 subjects, met the inclusion criteria. The results of the selected studies showed that ULExT is safe and can significantly improve the performance of ADL that involve the UL in patients with COPD. However, there were inconsistencies in the results, especially regarding the perception of symptoms during ADL. The small number of studies included and their methodological quality do not allow for firm conclusions. Conclusions: The findings of this review revealed that ULExT is a safe therapeutic approach and can improve the performance of ADL that involve the UL in patients with COPD, but the results are unclear. Further investigation through well-designed randomized trials is warranted to determine the effectiveness of ULExT in improving the performance of ADL that involve the UL in patients with COPD.
RESUMO Objectivo: Investigar a eficácia do treinamento de membros superiores (MMSS) na melhora na execução de atividades da vida diária (AVD) que envolvem os MMSS em pacientes com DPOC. Métodos: Nesta revisão sistemática foram utilizadas as diretrizes do Preferred Reporting Items for Systematic Reviews and Meta-Analyses. Os bancos de dados PubMed e EBSCOhost foram pesquisados para identificar ensaios controlados randomizados envolvendo adultos com DPOC submetidos a treinamento de MMSS, comparados àqueles submetidos a outros tipos de exercício ou a nenhum exercício, a fim de avaliar a execução de AVD que envolvem os MMSS. A qualidade metodológica dos estudos selecionados foi avaliada por meio da escala do Physiotherapy Evidence Database. Resultados: Cinco estudos, com uma amostra total de 173 indivíduos, preencheram os critérios de inclusão. Os resultados dos estudos selecionados mostraram que o treinamento de MMSS é seguro e pode melhorar significativamente a execução de AVD que envolvem os MMSS em pacientes com DPOC. No entanto, houve inconsistências nos resultados, especialmente em relação à percepção de sintomas durante as AVD. O pequeno número de estudos incluídos e a qualidade metodológica desses estudos não permitem conclusões firmes. Conclusões: Os achados desta revisão revelaram que o treinamento de MMSS é uma abordagem terapêutica segura e pode melhorar a execução de AVD que envolvem os MMSS em pacientes com DPOC, mas os resultados não são claros. São necessárias mais investigações, por meio de ensaios aleatorizados bem desenhados, para determinar a eficácia do treinamento de MMSS na melhora na execução de AVD que envolvem os MMSS em pacientes com DPOC.
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OBJECTIVE: Evaluation of myocardial histological changes in an experimental animal model of neonatal hypoxiareoxygenation. METHODS: Normocapnic hypoxia was induced in 40 male Landrace/Large White piglets. Reoxygenation was initiated when the animals developed bradycardia (HR <60 beats/min) or severe hypotension (MAP <15 mmHg). The animals were divided into four groups based on the oxygen (O2) concentration used for reoxygenation; groups 1, 2, 3, and 4 received 18%, 21%, 40%, and 100% O2, respectively. The animals were further classified into five groups based on the time required for reoxygenation: A: fast recovery (<15 min); B: medium recovery (15-45 min); C: slow recovery (45-90 min); D: very slow recovery (>90 min), and E: nine deceased piglets. RESULTS: Histology revealed changes in all heart specimens. Interstitial edema, a wavy arrangement, hypereosinophilia and coagulative necrosis of cardiomyocytes were observed frequently. No differences in the incidence of changes were observed among groups 1-4, whereas marked differences regarding the frequency and the degree of changes were found among groups A-E. Coagulative necrosis was correlated with increased recovery time: this condition was detected post-asphyxia in 14%, 57%, and 100% of piglets with fast, medium, and slow or very slow recovery rates, respectively. CONCLUSIONS: The significant myocardial histological changes observed suggest that this experimental model might be a reliable model for investigating human neonatal cardiac hypoxia-related injury. No correlation was observed between the severity of histological changes and the fiO2 used during reoxygenation. Severe myocardial changes correlated strictly with recovery time, suggesting an unreported individual susceptibility of myocardiocytes to hypoxia, possibly leading to death after the typical time-sequence of events.