Magnetically Levitated Centrifugal Blood Pump Cartridge
Features bearingless MagLev impeller (diameter 36 mm) driven by brushless DC stator coils.
Biomedical Engineering / Rotary Blood Pump Head-Flow
FREE TO EXPLORELABORATORY 33 · BIOMEDICAL ENGINEERING
Centrifugal Continuous-Flow Rotary Blood Pump Head-Flow Characteristic
Determine the shut-off pressure head scaling constant k_N of a magnetically levitated continuous-flow rotary blood pump (LVAD) across operating speeds. Explore interactive physiological instrumentation simulation, biomechanics, and biomedical engineering telemetry.
BIOINSTRUMENTATION · BIOSIGNALS · BIOMECHANICS · IMAGING
Your virtual biomedical engineering laboratory.
ZERO-FLOW SHUT-OFF HEAD H₀—
PHYSIOLOGICAL & TEST CELL TELEMETRY
Ready to sample with Speed N = 3.0 k-RPM.
Adjust Speed N, then execute biomedical trial.
Biomedical engineering telemetry and physiological states are evaluated rigorously using 64-bit IEEE 754 precision. Residuals reflect ordinary least-squares regression across successive observations. Continuous data structures support high-fidelity biological and physiological modeling.
Biomedical assumptions and boundary condition limits
Zero-flow shut-off testing evaluates the maximum static head; operational LVADs deliver 4 to 6 L/min where dynamic frictional losses reduce delivered head. Evaluated on a magnetically levitated continuous-flow centrifugal blood pump (impeller diameter 36 mm) circulating a blood-analog fluid (38% glycerol-water, density ρ = 1055 kg/m³, viscosity 3.6 cP at 37 °C). Speeds N = 2.0, 2.5, 3.0, 3.5, 4.0, 4.5 k-RPM correspond to N² = 4.00, 6.25, 9.00, 12.25, 16.00, 20.25 k-RPM². Shut-off head scaling constant k_N = 7.5000 mmHg/k-RPM².
Biomedical apparatus & physiological sensors.
Mock Circulatory Cardiovascular Test Loop
Provides compliant hydraulic flow circuit with precision pinch valve for zero-flow shut-off testing.
Dual High-Precision Differential Pressure Transducers
Measures pump inlet pressure P_in and outlet pressure P_out to determine pressure head H = P_out - P_in.
Ultrasonic Transit-Time Clamp-On Flowmeter (Transonic Systems)
Verifies true zero flow (Q = 0.00 L/min) during shut-off head measurements.
Optical Tachometer & Hall Sensor Speed Controller
Maintains closed-loop impeller rotational speed N within ±1 RPM of setpoint.
Thermostatically Controlled Glycerol-Water Reservoir (37.0 °C)
Maintains blood-analog fluid viscosity (3.6 cP) and density (1055 kg/m³).
FOLLOW THE METHOD
A reason behind every step.
Determine the shut-off pressure head scaling constant k_N of a magnetically levitated continuous-flow rotary blood pump (LVAD) across operating speeds. Standardized parameter settings: 2.0, 2.5, 3.0, 3.5, 4.0, 4.5 k-RPM.
01
Pump Cartridge Installation and Priming
Mount the centrifugal blood pump in the mock loop, prime with 38% glycerol blood-analog at 37.0 °C, and purge all microscopic air bubbles.
02
Magnetic Levitation and Rotor Calibration
Energize active magnetic levitation coils and verify central impeller suspension without mechanical housing contact.
03
Pressure Transducer Zeroing at Rest
With the pump stopped (N = 0 RPM), open cross-bypass to confirm equal inlet and outlet pressure, zeroing differential transducer to 0.00 mmHg.
04
Zero-Flow Shut-Off Head Initialization
Close the downstream outflow valve to establish zero volumetric flow (Q = 0.00 L/min), set impeller speed to N = 2.0 k-RPM (2000 RPM), and log shut-off head H_0.
05
Impeller Speed Progression Sequence
Increment rotor speed through 2.5, 3.0, 3.5, 4.0, and 4.5 k-RPM, recording stabilized shut-off pressure head H_0 at each speed step.
06
Euler Affinity Quadratic Regression Analysis
Plot shut-off head H_0 against N², determine pump scaling constant k_N via linear regression through the origin, and calculate maximum blade tip velocity.
YOUR NOTEBOOK · 0 OBSERVATIONS
Turn measurements into biomedical engineering insight.
Points are your recorded observations. The solid regression line validates Rotary Blood Pump Head-Flow mathematical scaling.
LINEAR REGRESSION FIT · y = mx + b
H₀ = k_N · N² = 7.5000 · N² (where N is in k-RPM = RPM/1000)
| # | Impeller Rotational Speed N (k-RPM) | Zero-Flow Shut-Off Head H₀ (mmHg) | Square of rotational speed N² (k-RPM²) | Shut-off pressure head H₀ (mmHg) | Remove |
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