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Purge system for rotary blood pumps
A J Sipin1, B Bender, W J Fabrey
1Anatole J. Sipin Co., Inc., New York, New York 10018, USA.
Artificial Organs
|July 1, 1997
Summary
A new miniature purge liquid pump was developed for rotary blood pumps to lubricate bearings and wash seals, reducing blood damage and extending pump life. This device supports pump maintenance without interrupting blood flow.
Area of Science:
- Biomedical Engineering
- Medical Devices
- Fluid Dynamics
Background:
- Rotary blood pumps (RBPs) are crucial for treating heart failure.
- Bearing lubrication and seal washing are essential for RBP longevity and function.
- Minimizing hemolysis and thrombosis is critical for patient safety and device efficacy.
Purpose of the Study:
- To develop a miniature purge liquid pump for RBPs.
- To meet specific performance requirements for purge flow rate and pressure.
- To enable pump servicing without interrupting blood flow.
Main Methods:
- Design and development of a novel miniature purge liquid pump (80 g).
- Achieved a design point of 1 ml/h at 1,000 mm Hg with 4 mW motor power.
- Preliminary design of a wearable purge delivery unit.
Main Results:
- Successful development of a miniature purge liquid pump meeting design specifications.
- The pump can maintain flow rate for sufficient time during servicing.
- A preliminary wearable unit design integrates essential components for portability.
Conclusions:
- The developed miniature purge liquid pump is a viable solution for enhancing RBP performance and endurance.
- This technology offers a pathway to improved clinical application of RBPs.
- Further development of the wearable purge delivery unit is warranted.