» Articles » PMID: 38544153

The Feasibility of Semi-Continuous and Multi-Frequency Thoracic Bioimpedance Measurements by a Wearable Device During Fluid Changes in Hemodialysis Patients

Abstract

Repeated single-point measurements of thoracic bioimpedance at a single (low) frequency are strongly related to fluid changes during hemodialysis. Extension to semi-continuous measurements may provide longitudinal details in the time pattern of the bioimpedance signal, and multi-frequency measurements may add in-depth information on the distribution between intra- and extracellular fluid. This study aimed to investigate the feasibility of semi-continuous multi-frequency thoracic bioimpedance measurements by a wearable device in hemodialysis patients. Therefore, thoracic bioimpedance was recorded semi-continuously (i.e., every ten minutes) at nine frequencies (8-160 kHz) in 68 patients during two consecutive hemodialysis sessions, complemented by a single-point measurement at home in-between both sessions. On average, the resistance signals increased during both hemodialysis sessions and decreased during the interdialytic interval. The increase during dialysis was larger at 8 kHz (∆ 32.6 Ω during session 1 and ∆ 10 Ω during session 2), compared to 160 kHz (∆ 29.5 Ω during session 1 and ∆ 5.1 Ω during session 2). Whereas the resistance at 8 kHz showed a linear time pattern, the evolution of the resistance at 160 kHz was significantly different ( < 0.0001). Measuring bioimpedance semi-continuously and wth a multi-frequency current is a major step forward in the understanding of fluid dynamics in hemodialysis patients. This study paves the road towards remote fluid monitoring.

Citing Articles

Effect of body orientation and joint movement on local bioimpedance measurements.

Abie S, de Roman A, Hou J J Electr Bioimpedance. 2024; 15(1):137-144.

PMID: 39371331 PMC: 11452779. DOI: 10.2478/joeb-2024-0016.

References
1.
Jaffrin M, Morel H . Body fluid volumes measurements by impedance: A review of bioimpedance spectroscopy (BIS) and bioimpedance analysis (BIA) methods. Med Eng Phys. 2008; 30(10):1257-69. DOI: 10.1016/j.medengphy.2008.06.009. View

2.
Matsushita K, Ballew S, Yee-Moon Wang A, Kalyesubula R, Schaeffner E, Agarwal R . Epidemiology and risk of cardiovascular disease in populations with chronic kidney disease. Nat Rev Nephrol. 2022; 18(11):696-707. DOI: 10.1038/s41581-022-00616-6. View

3.
Patel R, Matthie J, Withers P, Peterson E, Zarowitz B . Estimation of total body and extracellular water using single- and multiple-frequency bioimpedance. Ann Pharmacother. 1994; 28(5):565-9. DOI: 10.1177/106002809402800501. View

4.
Jain A, Lindsay R . Intra and extra cellular fluid shifts during the inter dialytic period in conventional and daily hemodialysis patients. ASAIO J. 2008; 54(1):100-3. DOI: 10.1097/MAT.0b013e318162c404. View

5.
Wang T, Syu J, Chu H, Sung Y, Chou L, Escott E . Intelligent Bio-Impedance System for Personalized Continuous Blood Pressure Measurement. Biosensors (Basel). 2022; 12(3). PMC: 8946827. DOI: 10.3390/bios12030150. View