The present disclosure pertains to control units for non-occlusive blood pumps of an extracorporeal circulatory support as well as systems comprising such a control unit and corresponding methods. Accordingly, a control unit for a non-occlusive blood pump of an extracorporeal circulatory support is configured to receive a flow value of the extracorporeal circulatory support, to receive a measurement of an arterial pressure and an ECG signal of a supported patient over a predetermined period of time, to determine a mean arterial pressure of the extracorporeal circulatory support or of the supported patient from the measurement of the arterial pressure and an energy equivalent pressure from the flow value and the arterial pressure.

In some examples, a medical system includes a pump is configured to provide a pulsating blood flow. The pump may provide the pulsating flow to assist the pumping action of a heart. An impeller is configured to impart energy to the blood flow when the impeller rotates around an eye axis extending through an impeller eye defined by the impeller. The pump includes a magnetic bearing configured such that, as the impeller rotates around the eye axis, the eye axis translates around a post axis defined by a post mechanically supported by a pump housing. The medical system may include a controller configured to control a bearing magnetic field and/or a stator magnetic field to control a pressure of the pulsating flow and/or a speed of the pump.

A minimally invasive circulatory support platform that utilizes an aortic stent pump or pumps is described. The platform uses a low profile catheter-based techniques and provides temporary and chronic circulatory support depending on the needs of the patient. Also described is a catheter-based temporary assist pump to treat patients with acute decompensated heart failure and provide circulatory support to subjects undergoing high risk percutaneous coronary intervention. Further described is a wirelessly powered circulatory assist pump for providing chronic circulatory support for heart failure patients. The platform and system are relatively easy to place, have higher flow rates than existing systems, and provide improvements in the patient's renal function.

A temporary, removable mechanical circulatory support heart-assist device has at least two propellers or impellers. Each propeller or impeller has a number of blades arranged around an axis of rotation. The blades are configured to pump blood. The two propellers or impellers rotate in opposite directions from each other. The device can be configured to be implanted and removed with minimally invasive surgery.

A temporary, removable mechanical circulatory support heart-assist device has at least two propellers or impellers. Each propeller or impeller has a number of blades arranged around an axis of rotation. The blades are configured to pump blood. The two propellers or impellers rotate in opposite directions from each other. The device can be configured to be implanted and removed with minimally invasive surgery.

Systems, devices and methods for treating lymphatic congestion are disclosed. In one method, a balloon is placed at or near the veno-lymph junction. The balloon is inflated and deflation through cycles of slow inflation and rapid deflation. In another embodiment, an arteriovenous fistula is created near the veno-lymph junction. Alternate embodiments may also include axial pumps, stents, or balloons in combination with the fistula. These devices and methods create an acceleration of the blood flow past the lymphatic duct which reduces local pressure via the Venturi effect and according to the Bernoulli principle which facilitates lymph entering into the bloodstream.

An implantable pump system is provided, suitable for use as a left ventricular assist device (LVAD) system, having an implantable pump, an extracorporeal battery and a controller coupled to the implantable pump, and a programmer selectively periodically coupled to the controller to configure and adjust operating parameters of the implantable pump. The implantable pump includes a flexible membrane coupled to an actuator assembly that is magnetically engagable with electromagnetic coils, so that when the electromagnetic coils are energized, the actuator assembly causes wavelike undulations to propagate along the flexible membrane to propel blood from through the implantable pump. The controller may be programmed by a programmer to operate at frequencies and duty cycles that mimic physiologic flow rates and pulsatility while operating in an efficient manner that avoids thrombus formation, hemolysis and/or platelet activation.

Disclosed is a Cannula system (CS1 to CS3, 210, 310, 1010, 1040, 1110) comprising: a first cannula (O1 to O3) having a minimum inner diameter or width, a second cannula (I1 to I3) having a maximum outer diameter or width, wherein the minimum inner diameter or width is greater than the maximum outer diameter or width, wherein the second cannula (I1 to I3) is adapted to be guided into the first cannula (O1 to O3) such that a first lumen of the first cannula (O1 to O3) remains in the first cannula (O1 to O3) between an outer surface the second cannula (I1 to I3) and an inner surface of the first cannula (O1 to O3), and wherein the first lumen of the first cannula (O1 to O3) defines a first fluid conduit and a first lumen of the second cannula (I1 to I3) defines a second fluid conduit.

Disclosed is a Cannula system (CS1 to CS3, 210, 310, 1010, 1040, 1110) comprising: a first cannula (O1 to O3) having a minimum inner diameter or width, a second cannula (I1 to I3) having a maximum outer diameter or width, wherein the minimum inner diameter or width is greater than the maximum outer diameter or width, wherein the second cannula (I1 to I3) is adapted to be guided into the first cannula (O1 to O3) such that a first lumen of the first cannula (O1 to O3) remains in the first cannula (O1 to O3) between an outer surface the second cannula (I1 to I3) and an inner surface of the first cannula (O1 to O3), and wherein the first lumen of the first cannula (O1 to O3) defines a first fluid conduit and a first lumen of the second cannula (I1 to I3) defines a second fluid conduit.

A system for treating a patient with a heart condition includes an atrial assist device (AAD) configured to be positioned in the patients heart to pump blood from an atrium of the patients heart into a ventricle associated with the atrium. The system also includes a controller operatively connected to the AAD and being configured to control the AAD to pump blood from the atrium of the patients heart into the ventricle associated with the atrium.