demonstrated a correlation between ReDS values and lung fluid levels, 8,9 as well as the clinical implications of ReDSguided heart failure management. 10, 11 The Second Department of Internal Medicine, Toyama University received permission to use the device for the first time in Japan before commercial marketing. The device itself will soon be clinically available in Japan.In the present proof-of-concept study, we investigated the relationship between body posture and ReDS values in healthy volunteers to clarify the physiological proof of fluid shift depending on different body postures.
Methods
Participant SelectionHealthy volunteers aged >20 years without any past medical history were prospectively included in this single-center proofof-concept study between August and September 2021. This study was approved by the Clinical Research Review Board, University of Toyama (IRB no. MTK2020007), and written informed consent was obtained from all participants.