Control Devices TRIZ Cases

This case uses pulmonary artery pressure sensing and regression analysis to adjust LVAD flow and mode before right heart failure worsens.

This vena cava blood pump uses separated impellers to move blood away from renal vein junctions and reduce venous pressure.

Cyclic volume displacement and Venturi-enhanced flow support high cardiac output with a compact endovascular delivery profile.

A flexible stent pump uses timed inflatable valves and chamber cycling to support cerebral and systemic perfusion.

Sensors track pump speed, pressure, tubing age, and temperature to improve blood and dialysate flow control and treatment accuracy.

Current and blood flow feedback modulate impeller speed across systole and diastole to measure MAP in low-pulsatility patients.

This case replaces bulky pneumatic drivers with implanted motors and cam mechanisms for portable pumping and balanced ventricular pressures.

A pressure sensor and rotor-current flow estimate calculate pump differential pressure for adaptive ventricular assist control.

An actuated membrane replaces passive diffusion with controlled substance transfer, supporting delivery efficiency and tissue coupling.

Passive levitation and Hall-sensor feedback reduce bearing components while preserving rotor stability and blood flow in a compact pump.

This case shows how a hydrodynamic journal bearing and magnetic rotor support catheter-based circulatory assistance.

Dual pressure sensors enable catheter-free cardiac output measurement in implanted LVADs.

A two-part pump with an inflatable or self-expandable impeller supports radial access while reducing large-site complications.

A segmented controller isolates critical medical device functions while enabling secure data analysis and software updates.

This RVAD uses pressure sensors along its tube to verify placement, adjust pumping, and reduce stress from continuously open valves.

This case calibrates current-to-flow relationships with in-body measurements to reduce catheter-related errors in blood pump flow estimates.

NIRS-guided extracorporeal pumping maintains distal flow and reduces limb ischemia.

An implantable valve and external controller modulate SVC or IVC flow to reduce venous pressure and support decongestive therapy.

Automated blood circuits monitor organ conditions and adjust support for bioengineered organs.

A pressure-sensed pneumatic pump delivers counter-pulsatile support with less-invasive implantation for ambulatory heart-failure therapy.

Impedance electrodes built into the LVAD track ventricular changes for continuous heart-time volume measurement without external devices.

A shield, barrier features, and protective layers help preserve blood parameter detection as the pump navigates tortuous vessels.

A deformable, stent-reinforced cannula enables secure sutureless attachment while co-pulsatile pumping supports systolic and diastolic flow.

A gradually decreasing blade-edge curvature improves pressure generation and flow stability while limiting shear-related hemolysis.

An optical fiber running along the catheter detects light coupling from kinks, alerting physicians before placement accuracy is compromised.

Electroactive polymer tubes replace rotary pumps, reducing shear-related risks while providing controllable pulsatile cardiac assistance.