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A dynamic method for setting roller pumps nonocclusively reduces hemolysis and predicts retrograde flow
Y Tamari1, K Lee-Sensiba, E F Leonard
1Department of Surgery, North Shore University Hospital-New York University School of Medicine, Manhasset 11030, USA.
ASAIO Journal (American Society for Artificial Internal Organs : 1992)
|January 1, 1997
Summary
Setting roller pumps non-occlusively reduces hemolysis. A new dynamic method allows accurate flow measurement, even with retrograde flow, improving pump performance and patient safety.
Area of Science:
- Biomedical Engineering
- Cardiovascular Technology
Background:
- Roller pumps are typically set to be almost occlusive.
- This near-occlusive setting is used to ensure accurate forward flow measurement.
- However, non-occlusive settings are known to reduce hemolysis.
Purpose of the Study:
- To present a dynamic method for setting roller pumps non-occlusively.
- To evaluate the impact of non-occlusive settings on pump flow and hemolysis.
- To demonstrate that non-occlusive settings can reduce hemolysis without significantly affecting pump performance.
Main Methods:
- A novel dynamic method for setting roller pump occlusion was developed.
- Studies were conducted to measure pump flow and hemolysis at various non-occlusive settings.
- The dynamic method allows for prediction and correction of retrograde flow by adjusting pump speed.
Main Results:
- Non-occlusive roller pump settings significantly reduce pump-related hemolysis.
- The dynamic method accurately measures forward flow, accounting for retrograde flow.
- Minimal impact on overall pump performance was observed with optimized non-occlusive settings.
Conclusions:
- Roller pumps can be set more non-occlusively than the current standard.
- Implementing non-occlusive settings reduces patient hemolysis.
- The dynamic method provides a reliable way to achieve non-occlusive settings for improved safety.