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A Novel Method for Dry Weight Assessment in Hemodialysis Patients: Utilization of Inferior Vena Cava Flat Ratio to Correct for Individual Variations in Vessel Diameter
Author(s) -
Naruse Mashiro,
Sakaguchi Shunichi,
Nakayama Yushi,
oguchi Hiroshi,
Tomita Kimio
Publication year - 2007
Publication title -
therapeutic apheresis and dialysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.415
H-Index - 53
eISSN - 1744-9987
pISSN - 1744-9979
DOI - 10.1111/j.1744-9987.2007.00454.x
Subject(s) - medicine , inferior vena cava , hemodialysis , sagittal plane , ultrasonography , nuclear medicine , radiology , surgery
Measurement of the inferior of vena cava (IVC) diameter by ultrasonography (US) has been shown to be useful for assessing dry weight (DW) in hemodialysis (HD) patients. We have previously observed some cases in which the IVC diameter differed depending on whether measurements were obtained from sagittal or cross‐sectional images. Thus, in the present study we introduce a new concept, the flat ratio, to define the magnitude of IVC deflation. The flat ratio of the IVC (F‐IVC) is determined from cross‐sectional ultrasonographic images of the IVC. The present study showed that F‐IVC is significantly correlated with changes in body weight (ΔBW(%)). Similarly, the change in F‐IVC (ΔF‐IVC) during HD is correlated with ΔBW(%) but not with changes in systolic or diastolic blood pressure during HD. The results of the present study suggest that F‐IVC measurement can serve as a useful tool for DW assessment.