106 results about "Pump blood" patented technology

Apparatus and methods are described including delivering a left-ventricular assist device to a subject's aorta. The device including a distal-tip element that defines a straight proximal portion, and a curved distal portion, the curved distal portion defining first and second curves with an elongated straight portion between the first and second curves. The distal-tip element is centered with respect to the aortic valve using the curved distal portion of the distal-tip element, to thereby guide the device through the subject's aortic valve atraumatically. A pump pumps blood through from the subject's left ventricle to the subject's aorta. Other applications are also described.

Apparatus and methods are described including delivering a left-ventricular assist device to a subject's left ventricle. A tube is positioned such that a proximal portion of the tube traverses an aortic valve of the subject, and a distal portion of the tube is disposed within a left ventricle of the subject. A pump pumps blood through the tube from the subject's left ventricle to the subject's aorta such as to cause the proximal portion of the tube to be maintained in an open state, and to cause at least a portion of the tube to become curved. Other applications are also described.

A catheter includes a catheter body, a pump assembly and a cannula. The pump assembly can be disposed at a distal end of the catheter body and has a distal portion. The cannula can be coupled to the distal end portion of the pump assembly and can include a proximal cannula portion and a distal cannula portion. The distal cannula portion has an approximately helical shape which can allow the cannula to be inserted into a patient's right heart and pump blood therethrough. In certain implementations, the distal tip of the helical shape has a slight bias relative to the main helix to further facilitate delivery of the device. In certain applications this bias is toward the central axis of the helix.

Systems, devices and methods are provided for supporting cardiac function. A device comprises an elongate housing configured for implantation into a patient exterior to the chest cavity. The housing includes a first inlet and an outlet that define a primary blood flow path from the left atrium through at least a portion of the housing within the right atrium, and to the aorta. The housing comprises a motor disposed within the housing and an impeller coupled to the motor for pumping blood from the first inlet to the outlet of the housing through the primary blood flow path. The device bypasses the left ventricle by drawing freshly oxygenated blood from the left atrium and propelling this blood directly into the aorta. Implanting the pump exterior to the chest cavity is less invasive and allows the pump to be quickly and easily repaired, cleaned, repositioned and or replaced without removing or replacing the tubes that are anchored to sensitive tissue structures within the thoracic cavity.

An implantable LVAD is provided that includes a pump shaped so as to define a pump chamber. The pump includes a tubular linear motor, which includes a magnetic piston, which includes a reciprocating one-way valve configured to allow downstream blood flow and inhibit upstream blood flow; and a stator, which is configured to magnetically drive the magnetic piston with reciprocating motion, so as to pump blood downstream during downstream motion of the magnetic piston while the reciprocating one-way valve is closed. The pump further includes a spring, which is arranged to store energy during upstream motion of the magnetic piston and release the stored energy during the downstream motion of the magnetic piston. Control circuitry is configured to activate the tubular linear motor to provide pulsatile flow synchronized with cardiac cycles. Other configurations are also described.

A percutaneous circulation support device includes a percutaneous blood pump coupled to a distal end region of an elongate shaft at a junction. The percutaneous blood pump is configured to pump blood through a housing of the percutaneous blood pump during use. The joint includes an end cap at the proximal end of the percutaneous blood pump that surrounds and is secured to the distal end region of the elongate shaft at the joint. The joint may include a wrap filler that surrounds and extends proximally from a proximal end region of the end cap, and surrounds an outer surface of the elongate shaft. The proximal end region of the end cap may include an annular sidewall having one or more apertures and / or one or more grooves extending into the annular sidewall, and the cladding filler extending into the apertures and / or the grooves.

A mechanical circulatory support system may include a blood pump, a housing, an elongated shaft, a first sheath, and a second sheath. The blood pump may be configured to pump blood from the ventricles of a patient's heart to the patient's vascular system. The elongated shaft may be coupled to the blood pump and extends proximally from the blood pump to the housing. The first sheath may extend distally from the housing over the elongated shaft and include a cavity having an inner diameter. The second sheath may extend distally from the housing over the elongated shaft and include an outer diameter smaller than the inner diameter of the cavity of the first sheath. The first and second sheaths are configured for longitudinal adjustment along the elongated shaft, and the second sheath is configured to be adjusted via the first sheath.

A pump device includes an impeller and a housing that houses the impeller in a rotatable manner. The impeller includes a fin (vane) unit and a movable sleeve. The housing includes a fixed sleeve that houses the movable sleeve. A first gap is formed between an inner periphery of the movable sleeve and an opposing surface that faces the inner periphery. Since the inner periphery and the opposing surface are inclined relative to an axis of the impeller, the first gap is increased when the impeller ascends with rotation of the impeller.

The application discloses a device for assisting heart when functional failure occurs, comprising a driving assembly and a working assembly detachably connected with the driving assembly. The driving assembly comprises a motor and a driving magnet driven by the motor. The working assembly comprises a connecting shaft, a passive magnet arranged at the proximal end of the connecting shaft and coupled with the driving magnet, a driving shaft connected to the distal end of the connecting shaft and a pump. The pump is used for pumping blood to the desired position of the heart. The pump comprises a pump shell with an inlet end and an outlet end and an impeller accommodated in the pump shell. The impeller is connected to the distal end of the driving shaft and is driven to rotate to suck blood into the pump shell from the inlet end and discharge the blood from the outlet end. The driving magnet and the passive magnet have synchronous rotation in a first matching state and a second matching state in which the rotation speed of the passive magnet is lower than that of the driving magnet. Before the rotation speed of the motor is reduced to a certain threshold value, the driving magnet and the passive magnet can only be switched from the first matching state to the second matching state.

According to the pulsating anti-load pants and the simplified air bag heart assisting device, by adding the anti-load clothes and the pulsating and blood pumping functions of the anti-load pants, the standing anti-load pants during cruising are changed into pulsating pressurizing pants with time control air valve pulsating type inflation and deflation or left and right air bags alternately inflated and deflated; the thick and long blood vessels of the lower limbs and the one-way valves on the inner walls of the thick and long blood vessels of the lower limbs are extruded to pump blood to become a second external heart; a simplified air bag heart assisting device is a pulsating anti-load pants reduced configuration scheme, outer-layer clothes and pants of anti-load pants are removed, and the simplified air bag heart assisting device is simplified into a crus air bag or a thigh and crus communicated air bag sewed nylon fastener tape device, and left and right leg air bag air conveying rubber pipes are connected with two electromagnetic three-way valves respectively and then are combined through rubber pipes to be connected with an air pump. Two-way power-on and power-off of a time relay are used for controlling left and right electromagnetic valves or improved valves to be connected with air bags, an air pump and an external tee joint, so that left and right leg air bags are inflated and deflated in turn; the invention can be used as heart-aiding anti-load trousers and heart-aiding fitness equipment, and can improve the blood circulation of the human body.

Disclosed in the present application are a blood pumping device, a motor, and a ventricular assist device. The blood pumping device is used for pumping blood. The blood pumping device comprises a motor, a first pipe and a second pipe; the motor comprises a stator assembly, the stator assembly comprising a core, and the core enclosing to form an accommodating cavity; a first circulation cavity is formed in the core, and a second circulation cavity communicated with the first circulation cavity is formed in the core and / or in the accommodating cavity; the first pipe is communicated with the first circulation cavity, and the second pipe is communicated with the second circulation cavity; one of the first pipe and the second pipe serves as a perfusion pipe, and the other one serves as a backflow pipe; and the perfusion pipe is used for conveying a perfusate to the motor, and the backflow pipe is used for discharging the perfusate in the motor.

A circulatory support system includes an implantable blood pump including a housing, a rotor operable to pump blood from an inlet to an outlet, a stator, and at least two of the following: a current sensor, a rotor position sensor, an accelerometer, and a pressure sensor. The controller is connected to the sensors and includes a signal-processing module configured to receive, from each of the sensors, a data stream. The signal-processing module is also configured to filter the data streams received from the plurality of sensors, determine at least one of a pump operating parameter, a cardiac characteristic, and a pump control parameter based on at least two of the filtered data streams, and output the at least one of the pump operating parameter, the cardiac characteristic, and the pump control parameter to at least one of the operator interface module and the pump control module.

Example medical devices including example cardiac pumps are disclosed. An example percutaneous circulatory support device system includes a blood pump including a pump housing having a distal end region and a proximal end region, a blood inlet positioned along the distal end region, a blood outlet positioned along the proximal end region and a first diaphragm pump positioned within the pump housing. Further, the first diaphragm pump is configured to draw blood into the pump inlet and pump blood out of the blood outlet.

A catheter pump (1000), comprising a catheter (201), and a pump head (205) which can be delivered to an expected position of the heart through the catheter (201) to pump blood. The pump head (205) comprises a pump housing (2051) provided with a blood inlet (2051a) and a blood outlet (2051b), and an impeller (2052) accommodated in the pump housing (2051). The impeller (2052) is driven to rotate, so as to suction the blood from the blood inlet (2051a) into the pump housing (2051) and then pump out the blood from the blood outlet (2051b). The pump housing (2051) comprises a stent (20511) operably switched between a radially folded state and a radially unfolded state; in the radially unfolded state, the stent (20511) comprises a substantially cylindrical body portion (11), an inlet portion (12) located at the axially distal end of the body portion (11), and an outlet portion (13) located at the axially proximal end of the body portion (11); and the inlet portion (12) and the outlet portion (13) are connected and support the body portion (11). A plurality of mesh holes (14) are distributed on the body portion (11), and the mesh holes (14) are defined by at least two pairs of oppositely arranged edges (111). All the edges (111) have the same radial thickness, and the maximum circumferential width of the edges (111) at the end positions of the body portion (11) is smaller than the maximum circumferential width of the edges (111) at the middle position of the body portion (11).

An apparatus and method are described that includes an axial shaft (92) configured to be inserted into and rotate within a ventricle of a subject's heart. An impeller (50) is coupled to the axial shaft (92), and a frame (34) surrounds the impeller. A pump outlet tube (24) surrounds the frame such that, as the axial shaft (92) rotates, the impeller (50) pumps blood proximally from the ventricle through the pump outlet tube (24). An inlet guard (400) shaped to define one or more holes (402) is disposed around the axial shaft (92) and within the frame (34) distal to the impeller (50) so that blood flows through the holes (402) to the impeller (50). Other applications are also described.

The utility model discloses a percutaneous circulation auxiliary device. The percutaneous circulation auxiliary device comprises an intervention catheter and a diaphragm pump. The intervention catheter is provided with at least one blood inlet and at least one blood outlet, the blood inlet and the blood outlet are both one-way valves and are both in one-way conduction, and the diaphragm pump comprises a blood cavity separated by a flexible diaphragm and a driving liquid cavity used for charging and discharging liquid. When in use, the device is communicated with a liquid charging and discharging control device, is mainly used for assisting blood pumping of the right ventricle, can be placed into the right ventricle through femoral veins, assists the heart in doing work, and increases cardiac output; the utility model relates to a pulsating pump which can pump blood according to systole and diastole of the heart. The device is simple in structure and low in manufacturing cost, and has a good application prospect.

The application relates to the field of medical devices, in particular to a prosthesis capable of treating valve regurgitation, comprising a radially expandable stent body, the stent body comprising a plurality of diamond-shaped meshes, and at least three clamping members arranged at the outflow end of the stent body, used for positioning the aortic sinus and clamping the native valve leaflets; a sealing bag bulging outward is arranged on the stent body between adjacent clamping members, wherein the position of the sealing bag corresponds to the junction area of the aortic valve leaflets, and the sealing bag is attached to the tissue of the junction area of the aortic valve leaflets, and the configuration of the sealing bag is configured to guide the regurgitant blood to flow to the adjacent aortic sinuses on both sides when the blood regurgitates; in the application, the sealing bag guides the regurgitant blood to flow to the adjacent aortic sinuses in a diversion manner, so that blood regurgitation is avoided, and meanwhile, when the aorta pumps blood again, the blood in the aortic sinus is ejected, so that blood stasis is avoided.

1. The name of the design product: blood pump head. 2. The use of the design product: used in blood pump, pumping blood. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

A medical device system includes a medical device, an elongate shaft (12), a first sheath (30), and a second sheath (32). The elongate shaft may couple with the medical device and extend proximally from the medical device. The first sheath may have an elongate tube (31) configured to expand from a first inner diameter to a second inner diameter. The first sheath and the second sheath may longitudinally advance over the elongate shaft and a distal end (58) of the second sheath may advance through the lumen and extend distally beyond a distal end (38) of the first elongate tube into a vascular access site. The system may include a closure device configured to close the vascular access site around the second sheath. The medical device may include a blood pump (50) configured to pump blood from a ventricle of a heart of a patient to vasculature of the patient.

The embodiment of the invention provides an intelligent detection system and device based on ventricular assist equipment, and relates to the technical field of medical instruments.The system comprises the ventricular assist equipment and detection equipment, and the ventricular assist equipment is implanted into the heart of a patient in a percutaneous intervention mode and assists the heart of the patient in blood pumping; the detection device is used for detecting physiological nerve parameters of a patient during operation of the ventricular assist device, and the detection device executes the following intelligent detection method: acquiring a physical measurement signal at the current moment; mapping the physical measurement signal into a target discharge frequency of the baroreceptor according to a preset nonlinear mapping relation; and based on the target discharge frequency, adopting a physiological correlation model to predict the target neural activity of the patient. By applying the scheme provided by the embodiment, the autonomic nerve regulation state of the patient can be accurately and continuously evaluated.

A blood ultrafiltration system includes a blood filter (12) having first and second compartments (12a, 12b) separated by a semi-permeable membrane (12c). A blood input line (10a) and a blood output line (10b) are connected in fluid communication with the first compartment (12a). An effluent line (10c) is connected in fluid communication with the second compartment (12b). A peristaltic pump (14) is arranged to repeatedly engage with first and second line segments. In a first arrangement, the first line segment is part of the blood input line (10a) or the blood output line (10b), and the second line segment is part of the effluent line (10c). In a second arrangement, the first line segment is part of the blood input line (10a), and the second line segment is part of the blood output line (10b). The system is operable by the peristaltic pump (14) to pump blood through the blood filter (12) and control extraction of ultrafiltrate in the blood filter (12).

A seat cushion includes a plurality of inflatable cells, a pumping mechanism, and a manifold or valve system fluidly between the pumping mechanism and the inflatable cells. The manifold or the valve system, which may include a clutch and a motor, connect the pumping mechanism with the inflatable cells such that a plurality of zones are created. A valve assembly can include a plurality of valves and is adjustable among at least three valve configurations to vary fluid connections to the inflatable cells to produce rearwardly advancing waves. The pumping action produced by the inflation and deflation of the inflatable cells assists in pumping blood in a user's legs back toward the heart.

The invention discloses a portable hemodialysis instrument capable of preventing a loop from being blocked, and relates to the technical field of hemodialysis instruments. The blood pumping device comprises a shell, a reciprocating driving mechanism is arranged in the shell, a piston film is fixedly installed in a loop cavity in the shell, the reciprocating driving mechanism drives the piston film to reciprocate for blood pumping operation, and a sealing cover is fixedly installed at the end of the shell. According to the device, blood enters extracorporeal circulation through the connecting end, the flow monitoring mechanism monitors the blood flow of the blood inlet end and the blood return end in real time, when it is detected that the flow of the blood inlet end is obviously lower than the flow of the blood return end, it is indicated that thrombus is possibly formed or blockage is likely to happen in a loop, and at the moment, the anti-coagulation and anti-blocking mechanism is immediately started; the blood inlet pipeline is accurately filled with anticoagulant, initial thrombus is actively dissolved, and blockage expansion is prevented, so that manual shutdown cleaning in the background technology is avoided, dialysis continuity and safety are guaranteed, and one-way flowing of blood is guaranteed through the one-way valves on the two connecting ends.

A mechanical circulatory support system can include a blood pump, a housing, an elongated shaft, a first sheath, and a second sheath. The blood pump can pump blood from a chamber of a patient's heart to the patient's vasculature. The elongated shaft can be coupled with the blood pump and extend proximally from the blood pump to the housing. The first sheath can have a first hub and a lumen with an inner diameter. The second sheath can have a second hub and an outer diameter that is less than the inner diameter of the lumen. The first sheath and the second sheath can be longitudinally advanced over the elongated shaft, and a distal end of the second sheath can be advanced through the lumen and extend distally beyond a distal end of the first sheath.

Example medical devices including example cardiac pumps are disclosed. An example percutaneous circulatory support device system includes a blood pump including a pump housing having a distal end region and a proximal end region, a blood inlet positioned along the distal end region, a blood outlet positioned along the proximal end region and a first diaphragm pump positioned within the pump housing. Further, the first diaphragm pump is configured to draw blood into the pump inlet and pump blood out of the blood outlet.

This application relates to ventricular assist devices. Described herein are devices and methods, including a blood pump (20) configured to be placed within a body of a subject, the blood pump including an impeller (50) and a frame (34) disposed about the impeller, the impeller including proximal and distal bushings (64, 58), the frame including proximal and distal bearings (116, 118). An axial shaft (92) passes through the proximal and distal bearings (116, 118) of the frame and the proximal and distal bushings (64, 58) of the impeller (50). The impeller (50) defines a radially constrained configuration in which the impeller (50) is introduced into the body of the subject and a non-radially constrained configuration in which the impeller (50) is configured to pump blood within the body of the subject. The impeller (50) changes from its radially constrained configuration to its non-radially constrained configuration by sliding the distal bushing (58) over the axial shaft (92). Other applications are also described herein.

An intravascular device for pumping blood includes a catheter comprising a membrane chamber located between a proximal end and a distal end of the catheter. An inflatable membrane is disposed within the membrane chamber. The intravascular device includes a first one-way valve and optionally a second one-way valve configured to permit blood flow in a first direction. The first one-way valve may be positioned proximal to the membrane chamber, and the second one-way valve may be positioned distal to the membrane chamber. Methods related to intravascular devices and their respective use are provided.

Apparatus and methods are described including a blood pump (20) that includes an impeller (50) that pumps blood of the subject through a pump-outlet tube (24), such that the blood exits the pump-outlet tube (24) through blood-outlet openings (109). A driven diametric magnet (52) is coupled to the impeller (50) such that the impeller rotates with the driven diametric magnet (52). A driving diametric magnet (54) is configured for positioning alongside the driven diametric magnet (52) within the subject's body. A drive cable (130) rotates the driving diametric magnet (54), while the driving diametric magnet (54) is alongside the driven diametric magnet (52), such that the driving diametric magnet (54) rotates the driven diametric magnet (52) via magnetic coupling, thereby rotating the impeller (50). Other applications are also described.

This invention relates to a biomimetic heart-pumping blood circulation array-type multi-point absorption power generation buoy and method, belonging to the field of wave energy power generation buoy technology. It includes a main buoy, a power generation device, and multiple energy harvesting devices. The power generation device includes a potential energy collection chamber, a turbine generator, and a liquid collection chamber. The bottom of the potential energy collection chamber is connected to the inlet of the turbine generator, and the outlet of the turbine generator is connected to the top of the liquid collection chamber. The energy harvesting device includes a sub-buoy, a protective cover, and a retractable bladder. The protective cover is fixed inside the sub-buoy, and the retractable bladder is fixed inside the protective cover. The top inlet of the sub-buoy is connected to an inlet hose communicating with the retractable bladder. Multiple inlet hoses are connected to the outlet pipes of the liquid collection chambers. The top outlet of the sub-buoy is connected to an outlet hose communicating with the retractable bladder, and multiple outlet hoses are connected to the inlet pipes of the potential energy collection chambers. This invention can improve the power generation efficiency of the buoy.

Systems, devices and methods are provided for supporting cardiac function. One system comprises an implantable intracardiac device comprising a motor and a pump, a transmitting resonator comprising a magnetic coil and configured to transmit a first level of power through an outer skin surface of the patient and a receiving resonator configured for implantation within the patient, comprising a magnetic coil and configured to transmit a second level of power to the motor within the implanted device. A controller is coupled to the transmitting resonator and configured to control the resonators and other parameters in the system such that the second level of power remains at or above a threshold level, thereby ensuring that the pump will continuously pump blood through the heart at a sufficient rate regardless of any changes in the system, such as power loss due to transmission inefficiencies and / or changes in the relative positions between the transmitting and receiving coils.