A method for the estimation of hydration state during hemodialysis using a calf bioimpedance technique

Zhu, Fansan; Kuhlmann, Martin K.; Kotanko, Peter; Seibert, Eric; Leonard, Edward F.; Levin, Nathan W.

doi:10.1088/0967-3334/29/6/s42

Cited by 72 publications

(76 citation statements)

References 34 publications

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“…5,6,[9][10][11][13][14][15] This wellvalidated technique (accuracy of within 5%; repeatability of within 0.3%) uses impedance to electric current within a body segment to measure its fluid content. 16,17 We then measured the circumferences of the neck above the cricothyroid cartilage and of the thickest portion of the right calf by tape measure just before and after polysomnography as previously described. 5,6 Lines were drawn at these levels with a marker pen to ensure that measurements after sleep were made at exactly the same level as those before sleep.…”

Section: Weight Leg Fluid Volume and Neck And Calf Circumferencesmentioning

confidence: 99%

Differing Relationship of Nocturnal Fluid Shifts to Sleep Apnea in Men and Women With Heart Failure

Kasai

Motwani

Yumino

et al. 2012

Circ: Heart Failure

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In patients with heart failure (HF), obstructive sleep apnea (OSA) is associated with increased mortality rate, 1 and its prevalence (12%-53%) is higher than in the general population despite lower body weight. [2][3][4] One reason for this higher prevalence of OSA may be greater fluid retention. We demonstrated that fluid accumulated in the legs at the time of being upright during the day can redistribute into the neck at the time of being recumbent during sleep. Such nocturnal rostral fluid shift could cause distension of the neck veins and/or edema of the peripharyngeal soft tissue and facilitate upper airway (UA) obstruction. Indeed, during the night, the volume of fluid displaced from the legs strongly related to the degree of overnight increase in neck circumference (NC) and severity of OSA in men with or without HF or with end-stage renal disease. [5][6][7][8] More recently, proof that nocturnal rostral fluid shift is a cause of OSA was provided by the observation that use of venous compression stockings in nonobese men with OSA and in patients with chronic venous insufficiency reduced fluid accumulation in the legs during the day and the amount of rostral fluid shift at night that was accompanied by 36% to 37% reductions in the frequency of apneas and hypopneas per hour of sleep (apnea-hypopnea index [AHI]). 9,10 Clinical Perspective on p 474In patients with HF, women have a lower prevalence of OSA than men for unknown reasons.2 One possibility is a different pattern of gravity-dependent fluid movement out of the legs during sleep between the sexes. For example, compared with men, women may either have less fluid displaced from their legs overnight or less of this fluid may accumulate in the neck. Despite a similar volume of fluid displaced from the legs in response to inflation of antishock trousers during wakefulness, UA collapsibility assessed by critical UA closing pressure increased significantly more in men than in women.11 Accordingly, there may be sex-related differences in response to fluid displacement from the legs that protect women from UA collapse compared with men. We therefore hypothesized that compared with men, women with HF would have a smaller overnight increase in NC in association with a less severe degree of OSA than men despite no difference in the degree of overnight fluid displacement from the legs. To test this hypothesis, we compared Background-In men with heart failure, nocturnal rostral fluid shift is associated with an overnight increase in the neck circumference (NC) and with severity of obstructive sleep apnea. Because the prevalence of obstructive sleep apnea is lower in women than in men with heart failure, we hypothesized that less fluid would shift into the neck in association with less severe obstructive sleep apnea in women than in men with heart failure. Methods and Results-In 35 men and 30 women with heart failure, we assessed overnight changes in NC (∆NC) and leg fluid volume before and after polysomnography. The severity of obstructive sleep apnea was assessed b...

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Section: Weight Leg Fluid Volume and Neck And Calf Circumferencesmentioning

confidence: 99%

Differing Relationship of Nocturnal Fluid Shifts to Sleep Apnea in Men and Women With Heart Failure

Kasai

Motwani

Yumino

et al. 2012

Circ: Heart Failure

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“…Approaching normalized resistivity value in the calf provides a secondary indication of DW. The system used is a refinement of the Xitron Hydra multifrequency device which measures both extracellular resistance and resistivity (Zhu et al, 2008a). The algorithm used to determine normal hydration state employs two criteria together: a) flattening of the change in resistance (R E0 /R Et ) curve; and b) normalized resistivity in the range derived from healthy subjects.…”

Section: Combination Of Static and Dynamic Methodsmentioning

confidence: 99%

Dry Weight and Measurements Methods

Zhu¹,

Levin²

2011

Hemodialysis - Different Aspects

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“…Los cambios de masa magra o los acúmulos de lí-quidos abdominales (cirrosis, ascitis) no se reflejan adecuadamente en las mediciones corporales totales 19 . Además de la determinación de la composición corporal la SBIA se ha utilizado para evaluar la condición de hidratación en pacientes durante la hemodiálisis 20 , monitorizar el desarrollo de edema posquirúrgico en miembros inferiores 21 , evaluar la aparición de linfedema posterior a la resección ganglionar en cáncer de mama 22 , seguimiento del proceso de cicatrización en piel 23 , detección de sarcopenia en adultos mayores 24 y evaluar la presencia y severidad de lesiones musculares agudas 25,26 .…”

Section: Aplicaciones Clínicas De La Bieunclassified

Miografía por impedancia eléctrica

Gallo¹,

Correa²,

Miranda³

2016

Rev Col Med Fis Reh

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RESUMENLa miografía por impedancia eléctrica es una técnica novedosa, rápida, fácil de usar, no invasiva e indolora y que permite obtener información sobre la estructura tisular, que no es posible obtener utilizando otras técnicas de electrodiagnóstico. Si bien, aún se trata de una técnica en desarrollo, los estudios y publicaciones en el tema permiten visualizar su potencial de aplicación en la práctica clínica. El propósito del presente trabajo es la difusión de esta nueva herramienta de evaluación, a partir de la revisión de algunos conceptos básicos de bioimpedancia, que permitan la interpretación de los resultados de los estudios publicados sobre el tema, para luego considerar su uso en el diagnóstico y evaluación de ciertas patologías neuromusculares comunes.Palabras clave: bioimpedancia eléctrica, enfermedades neuromusculares, miografía por impedancia eléctrica. ABSTRACTElectrical impedance myography is a novel, fast, easy to use, non-invasive and painless technique that provides information on tissue structure not measurable using other electro-diagnostic techniques. While it is still under development, studies and publications on the subject allow visualizing their potential application in clinical practice. The purpose of this work is the dissemination of this new assessment tool, through a review of some basic concepts on bioimpedance, which allow the interpretation of results found in published studies on the topic, and, subsequently, a review of its uses in the diagnosis and evaluation of common neuromuscular diseases.

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A method for the estimation of hydration state during hemodialysis using a calf bioimpedance technique

Cited by 72 publications

References 34 publications

Differing Relationship of Nocturnal Fluid Shifts to Sleep Apnea in Men and Women With Heart Failure

Differing Relationship of Nocturnal Fluid Shifts to Sleep Apnea in Men and Women With Heart Failure

Dry Weight and Measurements Methods

Miografía por impedancia eléctrica

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