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      Impacto da sessão de hemodiálise na força de preensão manual Translated title: Impact of hemodialysis session on handgrip strength

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          Abstract

          Resumo Introdução: A força de preensão manual (FPM) é um método simples, confiável e com bom valor preditivo para avaliar a função muscular de pacientes submetidos à hemodiálise (HD). Porém, ainda não existe um consenso a respeito do momento mais apropriado para a aferição da medida, já que o desempenho da FPM pode ser influenciado pelas flutuações hidroeletrolíticas e de pressão arterial que acometem esses pacientes. Objetivo: Investigar o impacto da sessão de diálise sobre a FPM em pacientes submetidos à HD. Métodos: Trata-se de um estudo transversal com 156 pacientes [57,7% homens, idade mediana de 56,5 (42-67) anos, 28,8% diabéticos, IMC médio de 24,75 ± 4,5 kg/m2 e tempo em HD de 38 (19,25-72,75) meses]. Foram realizadas aferições da FPM com um dinamômetro nos minutos iniciais e ao término da sessão de HD. Os valores obtidos foram comparados com um padrão de referência nacional. Dados clínicos, demográficos e laboratoriais foram coletados do prontuário médico. Resultados: Foi observada uma redução significante da FPM após a sessão de HD (28,6 ± 11,4 kg para 27,7 ± 11,7 kg; p < 0,01). A prevalência de pacientes com FPM abaixo do percentil 30 aumentou de 44,9% para 55,1% (p < 0,01). A redução da pressão arterial durante a diálise foi o único fator que se associou com a redução da FPM. Conclusão: Os achados mostram que o processo de HD influencia negativamente a FPM.

          Translated abstract

          Abstract Introduction: Handgrip strength (HGS) is a simple and reliable method with a good predictive clinical value for assessing muscle function of patients undergoing hemodialysis (HD). However, there is no consensus regarding the appropriate moment for performing the HGS measurement since the performance of the HGS can be influenced by fluid, electrolyte and blood pressure changes that affect patients on HD. Objective: To investigate the impact of the dialysis session on the HGS in patients undergoing HD. Methods: This is a cross-sectional study with 156 patients [57.7% male, median age of 56.5 (42-67) years old, 28.8% diabetes, mean BMI of 24.75 ± 4.5 kg/m2 and HD vintage of 38 (19.25 to 72.75) months]. Measures of HGS were performed with a dynamometer during the initial minutes of the HD session and at the end of the session. The values obtained were compared with a national standard reference. Clinical, demographic and laboratory data were collected from medical records. Results: A significant reduction of HGS was observed after the HD session (28.6 ± 11.4 kg to 27.7 ± 11.7 kg; p < 0.01). The prevalence of patients with HGS below the 30th percentile increased from 44.9% to 55.1% (p < 0.01). The decrease in blood pressure during dialysis was the only factor associated with the reduction of HGS. Conclusion: These findings show that the HD procedure affects negatively the HGS.

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          Handgrip strength testing: A review of the literature

          Ev Innes (1999)
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            Hand-grip muscle strength, lean body mass, and plasma proteins as markers of nutritional status in patients with chronic renal failure close to start of dialysis therapy.

            We studied 115 patients (69 men, 46 women) with chronic renal failure (CRF) aged younger than 70 years close to the start of dialysis therapy to assess the prevalence of malnutrition and study the relationship between various nutritional parameters in these patients. Nutritional status was classified by means of subjective global assessment. Anthropometric measurements (AMs) were performed, and hand-grip strength (HGS) was measured using the Harpenden dynamometer. Body composition, including lean body mass (LBM), was evaluated by dual-energy x-ray absorptiometry (DXA), and LBM was also estimated by means of AMs and creatinine kinetics (CK). The mean age of the patients was 52 +/- 12 years, and creatinine clearance was 9 +/- 3 mL/min. Malnutrition was seen in 53 patients (48%). As expected, malnourished patients differed in several aspects from well-nourished patients. LBM (estimated by all methods), fat mass (FM), HGS, creatinine clearance, and transthyretin and vitamin A levels were less in malnourished patients, whereas serum albumin levels did not differ. Estimates of LBM by means of DXA, AMs, and CK correlated well with each other. Although DXA and AMs gave similar mean values, LBM was an average of 8 kg less estimated by means of CK, and Bland-Altman plots showed the best agreement between AMs and DXA. HGS showed a strong correlation to LBM (regardless of method) in both men and women. Serum albumin level was not related to HGS or LBM, whereas significant correlations were found between serum albumin level and albumin losses in urine, C-reactive protein (CRP) level, and creatinine clearance. Multiple logistic regression showed that low HGS, low percentage of FM, female sex, and high serum CRP levels were independent factors associated with malnutrition, whereas serum albumin level and percentage of LBM did not reach statistical significance. In conclusion, the present study shows a high prevalence of malnutrition in predialysis patients with CRF and suggests that HGS is a reliable, inexpensive, and easy-to-perform nutritional parameter in patients with CRF. Conversely, serum albumin level seems to be a poor nutritional marker in patients with advanced CRF.
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              Intradialytic complications during hemodialysis.

              With the advent of developments and advances in hemodialysis machine technology, dialysate water purification, and dialyzers, the clinical spectrum of intradialytic complications has changed over the decades. In the pioneering days of hemodialysis, patients could develop allergic reactions to dialyzer membranes, sterilizing and reprocessing agents, coupled with machines that could not accurately control ultrafiltration rates, and chemically and bacterially contaminated dialysate. Whereas today, although cardiovascular problems remain the most common intradialytic complication, these are mainly due to the time restraints of trying to cope with excessive dialytic weight gains and achieve target dry weight on a thrice weekly schedule, coupled with an aging elderly dialysis population with increasing co-morbidity.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                jbn
                Jornal Brasileiro de Nefrologia
                J. Bras. Nefrol.
                Sociedade Brasileira de Nefrologia (São Paulo )
                2175-8239
                December 2015
                : 37
                : 4
                : 451-457
                Affiliations
                [1 ] Universidade Federal de São Paulo Brazil
                Article
                S0101-28002015000400451
                10.5935/0101-2800.20150072
                26648494
                7483491d-bc82-44f4-b53e-1358251d2733

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0101-2800&lng=en
                Categories
                UROLOGY & NEPHROLOGY

                Urology
                dialysis,hand strength,muscle strength,muscle strength dynamometer,nutrition assessment,avaliação nutricional,dinamômetro de força muscular,diálise,força da mão,força muscular

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