Volume Overload in Patients Initiating Peritoneal Dialysis Examined

by Colleen Fleiss on  May 25, 2019 at 8:01 PM Research News
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In patients with kidney failure who initiated peritoneal dialysis, scientists have identified substantial volume overload, or too much fluid in the body. The findings of the study are published in CJASN.
Volume Overload in Patients Initiating Peritoneal Dialysis Examined
Volume Overload in Patients Initiating Peritoneal Dialysis Examined

The study also revealed variations in practice of care across different geographic regions. This variation was associated with differences in degree of volume overload.

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Individuals with kidney failure who are undergoing hemodialysis or peritoneal dialysis often experience fluid overload. To examine the implications of this condition, Wim Van Biesen, MD, PhD (University Hospital Ghent, in Belgium) and his colleagues designed a study to assess patients' health and fluid volume over time after initiating peritoneal dialysis. It's thought that actively managing volume overload may reduce the risk of technique failure (transfer from peritoneal dialysis to hemodialysis) and prolong patient survival.

In the study of 1,054 patients from 28 countries who were examined every 3 months, volume overload before the start of dialysis amounted to an average of 1.9 L and decreased to 1.2 L during the first year. After 3 years of follow-up, the average relative volume overload in patients was lower than at the start in participants from all regions except those of Latin American, where it increased. The investigators concluded that volume overload is already present before the start of dialysis, and it tends to improve over the first 6 months and stabilize afterwards.

At all time points, males and participants with diabetes were at a higher risk of experiencing volume overload. Also, volume overload was associated with a higher risk of premature death. The study revealed different treatment practices to address volume overload across dialysis centres and regions.

"We intended to associate practices of peritoneal dialysis--use of hypertonic exchanges, use of automated peritoneal dialysis vs. continuous ambulatory peritoneal dialysis, use of icodextrin, and use of diuretics--with technique failure. Our main finding is that the association between technique failure and fluid overload is dependent upon centre size and thus presumably experience within the treating centre," said Dr. Van Biesen.

In an accompanying Patient Voice editorial, Shari Gilford shared her experience of peritoneal dialysis, both ambulatory and automated, for 7 years. She also questioned why patients in Latin America had a different outcome than those from other regions.

"If there are factors other than dialysate type, dialysate concentrate, or diet which make it more difficult for patients to control their volume overload, patients need to be made aware of this," she wrote. "Based on my own experience [in hot vs. cold seasons], I wonder if the year-round hotter climate of Latin America, as opposed to most other regions in the study which have cold seasons, could have been a factor for fluid overload leading to increased mortality. Continued study of this variable might improve outcomes for peritoneal dialysis patients who live in warmer climes."

Source: Eurekalert

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