Hemorrhage during high-risk hemodialysis using controlled heparinization

Area of Science:

• Nephrology
• Hematology
• Critical Care Medicine

Background:

• The bleeding risk for patients undergoing hemodialysis, particularly those with pre-existing bleeding risks, remains incompletely understood.
• Establishing safe dialysis protocols for high-risk bleeding patients is crucial for effective renal replacement therapy.

Purpose of the Study:

• To evaluate a method for limiting heparin administration during hemodialysis in high-risk bleeding patients.
• To assess the safety and efficacy of using thrombin clotting time (TCT) for heparin management in this population.

Main Methods:

• A prospective study involving 51 patients at increased risk for bleeding, undergoing 300 hemodialysis sessions.
• Heparin administration was guided by pre-dialysis TCT measurements to assess sensitivity and monitored during dialysis.
• The extracorporeal circuit's clotting and patient bleeding complications were meticulously recorded.

Main Results:

• The TCT-guided heparin protocol successfully prevented clotting in the dialysis circuit.
• Overall bleeding complications were limited to 5% of cases.
• Patients with higher hemorrhage risk experienced more bleeding (26%), greater hematocrit drops, and increased need for blood transfusions.

Conclusions:

• Hemodialysis presents a significant bleeding risk for actively bleeding patients.
• Patients at risk for bleeding, but without active hemorrhage, can undergo hemodialysis safely with strict, TCT-controlled heparinization.