A blood pump system, comprising: a heart circulation pump (1) for being arranged in a heart so as to pump blood in the heart into an aorta; an aorta circulation pump (2) for being arranged in the aorta so as to supply blood in the aorta to a set organ; and a power transmission section (3) connected between the heart circulation pump (1) and the aorta circulation pump (2) so as to realize power transmission. The blood pump system is capable of accelerating the circulation of the blood in the heart and the blood in the aorta by means of the heart circulation pump (1) and the aorta circulation pump (2), respectively, thus assisting in improving the blood supply function of the heart. Moreover, rotating blades (112) of the blood pump system are adjustable. When in use, the rotating blades in a fully folded state allow the blood pump system to be placed into a body by means of a simple interventional operation, and then the rotating blades are unfolded to a semi-unfolded state or a fully unfolded state in the body to improve the blood flow condition.

A blood pump system, comprising: a heart circulation pump (1) for being arranged in a heart so as to pump blood in the heart into an aorta; an aorta circulation pump (2) for being arranged in the aorta so as to supply blood in the aorta to a set organ; and a power transmission section (3) connected between the heart circulation pump (1) and the aorta circulation pump (2) so as to realize power transmission. The blood pump system is capable of accelerating the circulation of the blood in the heart and the blood in the aorta by means of the heart circulation pump (1) and the aorta circulation pump (2), respectively, thus assisting in improving the blood supply function of the heart. Moreover, rotating blades (112) of the blood pump system are adjustable. When in use, the rotating blades in a fully folded state allow the blood pump system to be placed into a body by means of a simple interventional operation, and then the rotating blades are unfolded to a semi-unfolded state or a fully unfolded state in the body to improve the blood flow condition.

An external coil system for a transcutaneous energy transfer system (TETS), the external coil being configured to transfer energy sufficient to power and implantable blood pump. The system includes a housing containing the external coil, the housing includes a thermal insulating base, the external coil being partially disposed within the thermal insulating base and a thermally conductive plastic, the external coil being partially disposed within the thermally conductive plastic.

An external coil system for a transcutaneous energy transfer system (TETS), the external coil being configured to transfer energy sufficient to power and implantable blood pump. The system includes a housing containing the external coil, the housing includes a thermal insulating base, the external coil being partially disposed within the thermal insulating base and a thermally conductive plastic, the external coil being partially disposed within the thermally conductive plastic.

Apparatus and methods are described including a blood pump that includes an axial shaft configured for insertion into, and rotation within, a subject's body. The blood pump also includes an impeller, which includes a proximal bushing disposed over the axial shaft, a distal bushing disposed over the axial shaft distally from the proximal bushing, and one or more blades. Each of the blades includes a single inner helical elongate element, a single outer helical elongate element, and a film of material extending between the inner helical elongate element and the outer helical elongate element. The blades are proximally coupled to the proximal bushing and distally coupled to the distal bushing such that, as the axial shaft rotates, the blades rotate, thereby pumping blood of the subject. Other applications are also described.

A ventricular assist system including a cannula that defines a lumen and includes a first end and a second end. The second end of the cannula includes a tip that defines an opening, and a pump operably is coupled to the first end of the cannula. A pump anchor is operably coupled to the pump. The pump anchor has a retracted position and a deployed position. A tip anchor is operably coupled to the second end of the cannula proximate the tip. A sheath is selectively disposed around the cannula, and a guidewire disposed within the lumen of the cannula.

A ventricular assist system including a cannula that defines a lumen and includes a first end and a second end. The second end of the cannula includes a tip that defines an opening, and a pump operably is coupled to the first end of the cannula. A pump anchor is operably coupled to the pump. The pump anchor has a retracted position and a deployed position. A tip anchor is operably coupled to the second end of the cannula proximate the tip. A sheath is selectively disposed around the cannula, and a guidewire disposed within the lumen of the cannula.

Disclosed herein is a novel implantable transapical expandable heart pump with an extracorporeal motor, battery, and microprocessor that incorporates a valve. The pump can be placed through transapical puncture and does not require cutting the heart. The device can function in the left side of the heart expanding in the left ventricle and extending across the aortic valve to the ascending aorta; as well as the right side of the heart expanding in the right ventricle crossing the pulmonary valve into the main pulmonary artery. The device can replace full heart function when both sides are implanted.

Disclosed herein is a novel implantable transapical expandable heart pump with an extracorporeal motor, battery, and microprocessor that incorporates a valve. The pump can be placed through transapical puncture and does not require cutting the heart. The device can function in the left side of the heart expanding in the left ventricle and extending across the aortic valve to the ascending aorta; as well as the right side of the heart expanding in the right ventricle crossing the pulmonary valve into the main pulmonary artery. The device can replace full heart function when both sides are implanted.

Apparatus and methods are described including a blood pump that includes an axial shaft configured for insertion into, and rotation within, a subject's body. The blood pump also includes an impeller coupled to the axial shaft such that, as the axial shaft rotates, the impeller pumps blood of the subject. Proximal and distal radial bearings surround the axial shaft and are configured to radially stabilize the axial shaft while the axial shaft rotates. Proximal and distal sleeves, which are less flexible than the axial shaft, are disposed around the axial shaft, such that the proximal and distal sleeves contact the proximal and distal radial bearings, respectively, as the axial shaft rotates. A ratio between a length of the axial shaft and a combined length of the proximal sleeve and distal sleeve is between 2:1 and 6:1. Other applications are also described.