André de Oliveira Teixeira

Effects of different frequencies of transcutaneous electrical nerve stimulation on venous vascular reactivity

Transcutaneous electrical nerve stimulation (TENS) is a type of therapy used primarily for analgesia, but also presents changes in the cardiovascular system responses; its effects are dependent upon application parameters. Alterations to the cardiovascular system suggest that TENS may modify venous vascular response. The objective of this study was to evaluate the effects of TENS at different frequencies (10 and 100 Hz) on venous vascular reactivity in healthy subjects. Twenty-nine healthy male volunteers were randomized into three groups: placebo (n=10), low-frequency TENS (10 Hz, n=9) and high-frequency TENS (100 Hz, n=10). TENS was applied for 30 min in the nervous plexus trajectory from the superior member (from cervical to dorsal region of the fist) at low (10 Hz/200 μs) and high frequency (100 Hz/200 μs) with its intensity adjusted below the motor threshold and intensified every 5 min, intending to avoid accommodation. Venous vascular reactivity in response to phenylephrine, acetylcholine (endothelium-dependent) and sodium nitroprusside (endothelium-independent) was assessed by the dorsal hand vein technique. The phenylephrine effective dose to achieve 70% vasoconstriction was reduced 53% (P<0.01) using low-frequency TENS (10 Hz), while in high-frequency stimulation (100 Hz), a 47% increased dose was needed (P<0.01). The endothelium-dependent (acetylcholine) and independent (sodium nitroprusside) responses were not modified by TENS, which modifies venous responsiveness, and increases the low-frequency sensitivity of α1-adrenergic receptors and shows high-frequency opposite effects. These changes represent an important vascular effect caused by TENS with implications for hemodynamics, inflammation and analgesia.

A atuação da educação física nas residências multiprofissionais em saúde

Objetive: To present the activities under the competence of physical education and its performance in the multidisciplinary residences in health and the difficulties involved in this experience. Data synthesis: The study presented the activities of competence and the performance in the Unified Health System (Servico Unico de Saude - SUS) of the Hospital Multiprofessional Integrated Residency Program with emphasis on Adults’ Cardiometabolic Healthcare (Residencia Integrada Multiprofissional Hospitalar - RIHMAS) and the Multiprofessional Residency Program in Family Health (Residencia Multiprofissional em Saude da Familia - RMSF), supervised by the Commission of Multidisciplinary Residences (Comissao das Residencias Multiprofissionais - COREMU), both with two-year duration, aiming healthcare for SUS users. As regards the actions of residents, all activities take place at the Federal University of Rio Grande University Hospital; in their first year in RIMHAS, the activities are developed in the Emergency room, Medical and Surgical Clinic; in the second one, they occur in the Integrated Center for Diabetes and Physical Rehabilitation Centre. In RMSF there is a dip in the Family Health Strategy, carrying out activities in a Basic Health Unit, in addition to internships in other health services. Conclusion: The study shows that experiences that link the academic training of the Physical Education core and the SUS contribute to open a channel of dialogue between individuals acting in multiprofessional residency programs. doi: 10.5020/18061230.2014.p428

Respostas metabólicas e inflamatórias após infusão de insulina para a avaliação endotelial venosa

Resumen pt: Avaliar as alteracoes no perfil lipidico, na glicose, na insulina e nos marcadores inflamatorios apos infusao endovenosa de doses de insulina usadas para...