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Summary
Washing recovered blood with at least 500 ml saline in the Haemonetics Cell Saver is recommended to minimize residual heparin. Even if the red color clears, high heparin levels may persist, necessitating careful monitoring.
Area of Science:
- Biomedical Engineering
- Hematology
- Clinical Chemistry
Background:
- The Haemonetics Cell Saver is used for intraoperative blood salvage.
- Residual heparin in salvaged blood can pose risks.
- Accurate quantification of residual heparin is crucial for patient safety.
Purpose of the Study:
- To evaluate residual heparin levels in blood processed by the Haemonetics Cell Saver.
- To determine optimal saline wash volumes for heparin removal.
- To assess the reliability of visual inspection for heparin clearance.
Main Methods:
- Adaptation and application of Grann's polybrene neutralization test.
- Washing recovered blood with varying volumes of saline solution.
- Spectrophotometric analysis to quantify residual heparin.
Main Results:
- Residual heparin levels were measured in supernatant fluid after washing with increasing saline volumes.
- A minimum of 500 ml saline per 450-500 ml blood is suggested for effective heparin reduction.
- 700 ml saline wash is advised for greater heparin removal.
- Visual clearing of hemolyzed erythrocyte color does not guarantee safe heparin levels.
Conclusions:
- Saline wash volume is critical for effective heparin removal during blood salvage.
- Visual assessment of supernatant clarity is insufficient to confirm adequate heparin neutralization.
- Standardized washing protocols are necessary to ensure patient safety when using cell savers.