Pulsatile LVAD Linear Motor for Physiologic Blood Flow

The patent implements periodic pulsatile action by using a reciprocating piston that alternates between forward and backward motion, synchronized with the cardiac cycle. This periodic motion creates pulsatile blood flow that mimics natural heart function, thereby reducing sympathetic activation and peripheral vascular resistance while maintaining adequate blood flow.

The patent employs dynamic adjustment of the piston motion characteristics to match the patient's cardiac cycle. The reciprocating piston's velocity and position are continuously adjusted to synchronize with natural heart beats, creating physiologic pulsatility that reduces harmful sympathetic effects while maintaining cardiac output.

The reciprocating piston creates periodic pulsatile flow that mimics natural cardiac cycles. This periodic action allows the aortic valve to open and close naturally with each pulse, reducing continuous strain on the aortic leaflet and preventing fusion and regurgitation that occur with continuous-flow devices.

The device incorporates sensing mechanisms that detect aortic pressure and valve status, providing feedback to adjust piston motion accordingly. This feedback control ensures the piston stops or reverses when the aortic valve closes, preventing excessive strain on the aortic leaflet while maintaining adequate blood flow.

The patent implements periodic pulsatile blood flow through reciprocating piston motion synchronized with the cardiac cycle. This pulsatility restores normal blood flow patterns to the gastrointestinal system, reducing proteolysis and preventing the coagulopathy and gastrointestinal bleeding that are common with continuous-flow devices.

The device changes the temporal parameters of blood flow from continuous to pulsatile by adjusting piston velocity and position. This parameter change restores physiologic blood flow patterns that protect gastrointestinal mucosa and prevent bleeding, while maintaining adequate cardiac output.

The reciprocating piston creates periodic pulsations in blood pressure that sync with the cardiac cycle. This restores measurable pulsatile pressure waves, enabling accurate blood pressure measurement using standard sphygmomanometers and arterial lines, whereas continuous-flow devices produce flat pressure traces that are difficult to measure.

The device incorporates pressure sensors that provide real-time feedback on aortic pressure fluctuations. This feedback enables the system to maintain physiologic pulsatility and simultaneously provides accurate pressure data for monitoring and measurement, resolving the measurement challenge of continuous-flow devices.

The patent replaces complex mechanical valve mechanisms with a simpler reciprocating piston system that uses magnetic or mechanical drive to create pulsatile flow. This substitution reduces the number of moving parts and potential failure points while maintaining the ability to mimic natural heart function and reduce side effects.

The reciprocating piston mechanism serves multiple functions simultaneously: it drives blood flow, creates pulsatility, and can be synchronized with the cardiac cycle. This multi-functionality reduces the need for separate mechanisms for each function, thereby reducing overall device complexity while maintaining therapeutic effectiveness.