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Nephrol Dial Transplant (2003) 18: 647-650
© 2003 European Renal Association-European Dialysis and Transplant Association

Editorial Comments

Can technology solve the clinical problem of ‘dry weight’?

Nicholas A. Hoenich and Nathan W. Levin

Renal Research Institute, New York, USA

Keywords: bioimpedance; dry weight; extracellular volume; fluid removal; haemodialysis; hydration

The first 150 words of the full text of this article appear below.

Introduction

Patients undergoing regular dialysis therapy for end-stage renal disease retain fluid during the interdialytic period, which is removed during dialysis. The aim of such fluid removal is to maintain a dry or target weight in the patient. This weight was defined as the lowest weight that the patient could tolerate without any intradialytic symptoms or hypotension at the termination of the treatment session. It may be more accurately defined as the weight at which there is no excess extracellular hydration in the tissues. The accurate assessment of patient dry weight can pose considerable difficulties due to the shape of the pressure–volume curve of the interstitial fluid spaces such that oedema may not be detectable until the interstitial volume has risen by ~30% above normal, corresponding to 4–5 l. The interdialytic weight gain seen in patients may not simply be a result of hypervolaemia; gain in body weight as a result . . . [Full Text of this Article]

What is bioimpedance and what does it measure?

Dry weight and bioimpedance measurements in dialysis patients

What are the limitations of bioimpedance measurements?

Conclusions


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