ABSTRACT
RESUMO Objetivo: Investigar a influência de uma sessão de mobilização passiva na função endotelial de pacientes com sepse. Métodos: Este foi um estudo quase-experimental duplo-cego e de braço único com desenho pré e pós-intervenção. Participaram 25 pacientes com diagnóstico de sepse hospitalizados em unidade de terapia intensiva. Avaliou-se a função endotelial basal (pré-intervenção) e imediatamente pós-intervenção por meio de ultrassonografia da artéria braquial. Foram obtidas a dilatação mediada pelo fluxo, a velocidade pico de fluxo sanguíneo e a taxa de cisalhamento pico. A mobilização passiva consistiu na mobilização bilateral (tornozelos, joelhos, quadris, pulsos, cotovelos e ombros), com três séries de dez repetições cada, totalizando 15 minutos. Resultados: Após a mobilização, encontramos aumento da função de reatividade vascular em relação à pré-intervenção: dilatação mediada pelo fluxo absoluta (0,57mm ± 0,22 versus 0,17mm ± 0,31; p < 0,001) e dilatação mediada pelo fluxo relativa (17,1% ± 8,25 versus 5,08% ± 9,16; p < 0,001). O pico de fluxo sanguíneo na hiperemia (71,8cm/s ± 29,3 versus 95,3cm/s ± 32,2; p < 0,001) e a taxa de cisalhamento (211s ± 113 versus 288s ± 144; p < 0,001) também aumentaram. Conclusão: Uma sessão de mobilização passiva foi capaz de aumentar a função endotelial em pacientes graves com sepse. Estudos futuros são necessários para investigar se um programa de mobilização pode ser aplicado como intervenção benéfica para melhorar clinicamente a função endotelial em pacientes hospitalizados por sepse.
ABSTRACT Objective: To investigate the influence of a passive mobilization session on endothelial function in patients with sepsis. Methods: This was a quasi-experimental double-blind and single-arm study with a pre- and postintervention design. Twenty-five patients with a diagnosis of sepsis who were hospitalized in the intensive care unit were included. Endothelial function was assessed at baseline (preintervention) and immediately postintervention by brachial artery ultrasonography. Flow mediated dilatation, peak blood flow velocity and peak shear rate were obtained. Passive mobilization consisted of bilateral mobilization (ankles, knees, hips, wrists, elbows and shoulders), with three sets of ten repetitions each, totaling 15 minutes. Results: After mobilization, we found increased vascular reactivity function compared to preintervention: absolute flow-mediated dilatation (0.57mm ± 0.22 versus 0.17mm ± 0.31; p < 0.001) and relative flow-mediated dilatation (17.1% ± 8.25 versus 5.08% ± 9.16; p < 0.001). Reactive hyperemia peak flow (71.8cm/s ± 29.3 versus 95.3cm/s ± 32.2; p < 0.001) and shear rate (211s ± 113 versus 288s ± 144; p < 0.001) were also increased. Conclusion: A passive mobilization session increases endothelial function in critical patients with sepsis. Future studies should investigate whether a mobilization program can be applied as a beneficial intervention for clinical improvement of endothelial function in patients hospitalized due to sepsis.
ABSTRACT
Sepsis is a serious organ dysfunction leading to endothelial damage in critical patients. Physiologically, there is an augment of vascular diameter in response to increased vascular blood flow and shear stress stimulus. However, the pattern of vascular response in face of passive mobilization (PM), an early mobilization physical strategy, has not yet been explored in patients with sepsis. To explore patterns of vascular response to PM and associations with clinical and cardiovascular profile in patients with sepsis. Cross-sectional, single-arm study. Thirty-two patients diagnosed with sepsis were enrolled. Vascular response was assessed by flow-mediated dilation (FMD) using brachial artery ultrasound, before and after PM. The PM (to assess the response pattern) and SR (shear rate) were also calculated. PM protocol consisted of knees, hips, wrists, elbows, shoulders, dorsiflexion/plantar flexion movements 3 × 10 repetitions each (15 min). Arterial stiffness was assessed by Sphygmocor®, by analyzing the morphology and pulse wave velocity. Cardiac autonomic modulation (CAM) was assessed by analyzing heart rate variability indexes (mean HR, RMSSD, LF, HF, ApEn, SampEn, DFA). Different vascular responses were observed after PM: (1) increased vascular diameter (responders) (n = 13, %FMD = 11.89 ± 5.64) and (2) reduced vascular diameter (non-responders) (n = 19, %FMD= -7.42 ± 6.44). Responders presented a higher non-linear DFA2 index (p = 0.02). There was a positive association between FMD and DFA (r = 0.529; p = 0.03); FMD and SampEn (r = 0.633; p < 0.01). A negative association was identified between FMD and LF (Hz) (r= -0.680; p < 0.01) and IL-6 (r= -0.469; p = 0.037) and SR and CRP (r= -0.427; p = 0.03).
Subject(s)
Pulse Wave Analysis , Sepsis , Blood Flow Velocity/physiology , Brachial Artery/diagnostic imaging , Cross-Sectional Studies , Endothelium, Vascular , Humans , Predictive Value of Tests , Regional Blood Flow/physiology , Stress, Mechanical , VasodilationABSTRACT
CONTEXT: Low-load resistance training (LL) and neuromuscular electrostimulation (NES), both combined with blood flow restriction (BFR), emerge as effective strategies to maintain or increase muscle mass. It is well established that LL-BFR promotes similar increases in muscle cross-sectional area (CSA) and lower rating of perceived exertion (RPE) and pain compared with traditional resistance training protocols. On the other hand, only 2 studies with conflicting results have investigated the effects of NES-BFR on CSA, RPE, and pain. In addition, no study directly compared LL-BFR and NES-BFR. OBJECTIVE: The aim of the study was to compare the effects of LL-BFR and NES-BFR on vastus lateralis CSA, RPE, and pain. Individual response for muscle hypertrophy was also compared between protocols. DESIGN: Intrasubject longitudinal study. SETTING: University research laboratory. INTERVENTION: Fifteen healthy young males (age = 23 [5] y; weight = 77.6 [11.3] kg; height = 1.76 [0.08] m). MAIN OUTCOME MEASURES: Vastus lateralis CSA was measured through ultrasound at baseline (pre) and after 20 training sessions (post). The RPE and pain responses were obtained through modified 10-point scales, handled during all training sessions. RESULTS: Both protocols demonstrated significant increases in muscle CSA (P < .0001). However, the LL-BFR demonstrated significantly greater CSA changes compared with NES-BFR (LL-BFR = 11.2%, NES-BFR = 4.6%; P < .0001). Comparing individual increases in CSA, 12 subjects (85.7% of the sample) presented greater muscle hypertrophy for LL-BFR than for the NES-BFR protocol. In addition, LL-BFR produced significantly lower RPE and pain responses (P < .0001). CONCLUSIONS: The LL-BFR produced significantly greater increases in CSA with significant less RPE and pain than NES-BFR. In addition, LL-BFR resulted in greater individual muscle hypertrophy responses for most subjects compared with NES-BFR.
Subject(s)
Electric Stimulation Therapy , Resistance Training , Adult , Humans , Hypertrophy , Longitudinal Studies , Male , Muscle Strength/physiology , Muscle, Skeletal/diagnostic imaging , Muscle, Skeletal/physiology , Pain , Quadriceps Muscle/physiology , Regional Blood Flow/physiology , Resistance Training/methods , Young AdultABSTRACT
OBJECTIVE: To investigate the influence of a passive mobilization session on endothelial function in patients with sepsis. METHODS: This was a quasi-experimental double-blind and single-arm study with a pre- and postintervention design. Twenty-five patients with a diagnosis of sepsis who were hospitalized in the intensive care unit were included. Endothelial function was assessed at baseline (preintervention) and immediately postintervention by brachial artery ultrasonography. Flow mediated dilatation, peak blood flow velocity and peak shear rate were obtained. Passive mobilization consisted of bilateral mobilization (ankles, knees, hips, wrists, elbows and shoulders), with three sets of ten repetitions each, totaling 15 minutes. RESULTS: After mobilization, we found increased vascular reactivity function compared to preintervention: absolute flow-mediated dilatation (0.57mm ± 0.22 versus 0.17mm ± 0.31; p < 0.001) and relative flow-mediated dilatation (17.1% ± 8.25 versus 5.08% ± 9.16; p < 0.001). Reactive hyperemia peak flow (71.8cm/s ± 29.3 versus 95.3cm/s ± 32.2; p < 0.001) and shear rate (211s ± 113 versus 288s ± 144; p < 0.001) were also increased. CONCLUSION: A passive mobilization session increases endothelial function in critical patients with sepsis. Future studies should investigate whether a mobilization program can be applied as a beneficial intervention for clinical improvement of endothelial function in patients hospitalized due to sepsis.
OBJETIVO: Investigar a influência de uma sessão de mobilização passiva na função endotelial de pacientes com sepse. MÉTODOS: Este foi um estudo quase-experimental duplo-cego e de braço único com desenho pré e pós-intervenção. Participaram 25 pacientes com diagnóstico de sepse hospitalizados em unidade de terapia intensiva. Avaliou-se a função endotelial basal (pré-intervenção) e imediatamente pós-intervenção por meio de ultrassonografia da artéria braquial. Foram obtidas a dilatação mediada pelo fluxo, a velocidade pico de fluxo sanguíneo e a taxa de cisalhamento pico. A mobilização passiva consistiu na mobilização bilateral (tornozelos, joelhos, quadris, pulsos, cotovelos e ombros), com três séries de dez repetições cada, totalizando 15 minutos. RESULTADOS: Após a mobilização, encontramos aumento da função de reatividade vascular em relação à pré-intervenção: dilatação mediada pelo fluxo absoluta (0,57mm ± 0,22 versus 0,17mm ± 0,31; p < 0,001) e dilatação mediada pelo fluxo relativa (17,1% ± 8,25 versus 5,08% ± 9,16; p < 0,001). O pico de fluxo sanguíneo na hiperemia (71,8cm/s ± 29,3 versus 95,3cm/s ± 32,2; p < 0,001) e a taxa de cisalhamento (211s ± 113 versus 288s ± 144; p < 0,001) também aumentaram. CONCLUSÃO: Uma sessão de mobilização passiva foi capaz de aumentar a função endotelial em pacientes graves com sepse. Estudos futuros são necessários para investigar se um programa de mobilização pode ser aplicado como intervenção benéfica para melhorar clinicamente a função endotelial em pacientes hospitalizados por sepse.
Subject(s)
Hyperemia , Sepsis , Humans , Endothelium, Vascular , Brachial Artery/diagnostic imaging , Brachial Artery/physiology , Sepsis/therapy , Early Ambulation , Blood Flow Velocity/physiologyABSTRACT
BACKGROUND AND AIM: Sepsis is associated with marked alterations in hemodynamic responses, autonomic dysfunction and impaired vascular function. However, to our knowledge, analysis of noninvasive markers to identify greater risk of death has not yet been investigated. Thus, our aim was to explore the prognostic utility of cardiac output (CO), stroke volume (SV), indices of vagal modulation (RMSSD and SD1), total heart rate variability (HRV) indices and FMD of brachial artery (%FMD), all measured noninvasively, in the first 24 hours of the diagnosis of sepsis. METHODS: 60 patients were recruited at ICU between 2015 and 2017 and followed by 28 days. CO, SV, RR intervals were measurement. Doppler ultrasound was used to assess brachial artery FMD and the hyperemic response were obtained (%FMD). Patients were divided by survivors (SG) and nonsurvivors groups (NSG). RESULTS: A total of 60 patients were analysed (SG = 21 and NSG = 39). Survivors were younger (41±15 years vs. 55±11 years) and used less vasoactive drugs. As expected, APACHE and SOFA scores were lower in NSG compared to SG. In addition, higher SD1, triangular index, % FMD, velocity baseline and hyperemia flow velocity as well as lower HR values were observed in the SG, compared to NSG (P<0.05). Interestingly, RMSSD and SD1 indices were independent predictors of %FMD, ΔFMD and FMDpeak. RMSSD threshold of 10.8ms and %FMD threshold of -1 were optimal at discriminatomg survivors and nonsurvivors. CONCLUSION: Noninvasive measurements of autonomic and endotelial function may be important markers of sepsis mortality, which can be easily obtained in the early stages of sepsis at the bedside.
