Effective determination of dry weight by intradialytic bioimpedance analysis in hemodialysis.
BACKGROUND
The new dry weight (DW) assessment technique by intradialytic sequential bioimpedance analysis (BIA) was evaluated in this study.


METHODS
Intradialytic changes in the ratio of resistance at baseline per each time point (R(0)/R(t)) determined by a total body single-frequency BIA were recorded in 19 hemodialysis patients. The bioimpedance DW (BIADW) could be drawn from a time point at which R(0)/R(t) was constant.


RESULTS
After the first session where the previous DW was prescribed, the participants could be divided into 2 groups: the under BIADW and over BIADW groups. In the under BIADW group, the BIADW was achieved earlier than the previous DW. The intradialytic symptoms disappeared without changes in the home-monitored mean blood pressure and antihypertensive agents at 1-month follow-up. In the over BIADW group, the BIADW could be obtained in the following sessions and the prescribed DW could be gradually reduced. The home-monitored mean blood pressure was decreased and the numbers of antihypertensive drugs were reduced.


CONCLUSIONS
Intradialytic single-frequency BIA assessment can be used as a tool to accurately determine the DW.
Chongthanakorn
Kamonrat
K
Division of Nephrology, Department of Medicine, Faculty of Medicine, King Chulalongkorn Memorial Hospital, Chulalongkorn University, Bangkok, Thailand.
Tiranathanagul
Khajohn
K
Susantitaphong
Paweena
P
Praditpornsilpa
Kearkiat
K
Eiam-Ong
Somchai
S
D000328:Adult; D000368:Aged; D001823:Body Composition; D017097:Electric Impedance; D005110:Extracellular Space; D005260:Female; D006801:Humans; D007676:Kidney Failure, Chronic / Q000628:therapy; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D006435:Renal Dialysis / Q000379:methods*