Accumulation of silicone elastomer in regular dialysis

Area of Science:

• Nephrology
• Materials Science
• Hepatology

Background:

• Chronic renal failure necessitates dialysis, a life-sustaining treatment.
• Dialysis equipment may introduce foreign materials into the patient's bloodstream.
• Silicone elastomer is commonly used in medical devices, including dialysis pumps.

Purpose of the Study:

• To investigate the presence and impact of silicone particles in patients undergoing dialysis.
• To determine the association between silicone deposits and liver disease in dialysis patients.

Main Methods:

• A retrospective autopsy study of 78 patients with chronic renal failure treated between 1964 and 1981.
• Analysis of tissue samples for silicone elastomer particles, particularly in patients using silicone rubber pump inserts for hemodialysis.
• Correlation of silicone particle presence and density with duration of hemodialysis and incidence of liver disease.

Main Results:

• Silicone elastomer particles were identified in 48% of hemodialysis patients using specific pump inserts, but not in others.
• Particle prevalence and density increased with longer hemodialysis treatment duration.
• Little tissue reaction to particles was observed, with no link to histological liver disease.
• A higher incidence of clinical and biochemical liver disease was noted in patients with silicone deposits.

Conclusions:

• Silicone particle spallation from dialysis equipment may occur.
• While direct causation is not definitively proven, silicone deposits are associated with increased hepatic dysfunction.
• Further investigation into the safety of silicone components in dialysis is warranted to mitigate potential risks.