biomedicus centrifugal pump

The Biomedicus Centrifugal Pump is a type of centrifugal blood pump commonly used in extracorporeal circulation during medical procedures such as cardiopulmonary bypass (CPB), extracorporeal membrane oxygenation (ECMO), and ventricular assist device (VAD) support. It is manufactured by Medtronic under the BioMedicus brand.

Key Features of the Biomedicus Centrifugal Pump:

1. Centrifugal Flow Design:

• Uses a rotating impeller to generate non-pulsatile (continuous) blood flow.

• Unlike roller pumps, it is afterload-dependent, meaning flow varies with resistance in the circuit.

2. Hollow Cone Design:

• The BioMedicus BPX-80 and BP-50 models have a spiral vortex cone-shaped impeller that minimizes blood trauma by reducing shear stress.

3. Magnetic Levitation (in Some Models):

• Newer versions may use magnetic or hydrodynamic bearings to reduce friction and hemolysis (red blood cell damage).

4. Single-Use & Reusable Options:

• Some models are disposable (e.g., BioMedicus NextGen), while older versions (like BPX-80) had reusable heads.

5. Low Priming Volume:

• Requires less blood to prime the pump compared to older roller pumps.

6. Compatibility:

• Used in ECMO, CPB, and VAD applications.

• Can be integrated with oxygenators in heart-lung machines.

Advantages:

• Reduced Hemolysis: Gentler on blood cells compared to roller pumps.

• Less Risk of Air Embolism: Air tends to stay trapped in the center of the pump head.

• No Occlusion Issues: Unlike roller pumps, it doesn’t require tight tubing compression.

Disadvantages:

• Afterload Sensitivity: Flow decreases if pressure resistance increases.

• Requires Flow Monitoring: Needs an external flowmeter (unlike roller pumps, which are preload-independent).

Common Models:

1. BioMedicus BPX-80 – Older reusable centrifugal pump.

2. BioMedicus BP-50 – Smaller pump for pediatric cases.

3. BioMedicus NextGen – Newer, disposable design with improved flow dynamics.

Clinical Applications:

• Cardiac Surgery: Used in CPB machines during open-heart surgery.

• ECMO: Provides circulatory support in severe cardiac/respiratory failure.

• VAD Support: Short-term ventricular assistance.

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