155 results about "Pump blood" patented technology

Apparatus and methods are described including a ventricular assist device that includes a frame having struts that define a plurality of cells. In its non-radially-constrained configuration, the frame includes a generally cylindrical portion. A tube defines blood outlet openings, and a portion of the tube is disposed outside the frame and is coupled to the generally cylindrical portion of the frame, such that the portion of the tube conforms with a structure of struts of the frame. An inner lining is coupled to an inside of the generally cylindrical portion of the frame, such as to provide the generally cylindrical portion of the frame with a smooth inner surface. An impeller is disposed at least partially inside the generally cylindrical portion of the frame and is configured to pump blood through the tube and out of the one of more blood outlet openings. Other applications are also described.

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.

An apparatus for a heart of a patient having a cardiac assist device adapted to be implanted into the patient to assist the heart with pumping blood. The apparatus has a sensor adapted to be implanted into the patient. The sensor in communication with the cardiac assist device and the heart which measures native volume of the heart. The apparatus has a first cardiac assist device and a second cardiac assist device tuned to maximize blood flow to the body of the patient, while resting the heart so the heart may recover function. Alternatively, the sensor monitors the heart based on admittance while the cardiac assist device. Alternatively, the sensor monitors the heart based on impedance.

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.

Apparatus and methods are described including a method for manufacturing a blood pump that includes inserting an impeller (50), which is configured to pump blood of a subject, into a frame (34) including a proximal portion, a central portion, and a frustoconical distal portion (40). A pump-outlet tube (24) is fixed over the proximal portion of the frame and at least part of the central portion of the frame. One or more blood-inlet openings (108) are formed in a sheet (144) of material. Subsequently to forming the blood-inlet openings (108), the sheet (144) of material is rolled so as to form a frustoconical inlet guard (145). The inlet guard (145) is coupled to the pump-outlet tube and fixed over the distal portion (40) of the frame. Other applications 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 right ventricular assist device (hereinafter, “RVAD”) for placement inside a mammalian subject includes a tube having an inlet configured to be positioned in the mammalian subject when the tube is in a proper position within a heart and an outlet configured to be located in a pulmonary artery when the tube is in the proper position. The RVAD also includes a plurality of sensors having measurement locations along the tube to measure a plurality of pressures of blood exterior to the tube at the measurement locations and a controller in communication with the pump and the plurality of sensors that convey the plurality of pressures to the controller with the controller being configured to instruct the pump to pump blood through the tube depending on at least one of the plurality of pressures.

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 present invention provides an artificial heart pump device and a preparation method of a magnetic diaphragm pump, belonging to the field of medical devices. The artificial heart pump device includes a magnetic diaphragm pump system and a magnetic field generating system; the magnetic diaphragm pump includes a magnetic diaphragm and a non-magnetic pump body; after the magnetic diaphragm is magnetized radially, it deforms under a uniform magnetic field; the non-magnetic pump body cooperates with the magnetic diaphragm to generate elastic deformation, and realizes the function of pumping blood by changing the volume of the magnetic diaphragm pump; a hose connects each artery or vein where the magnetic diaphragm pump is connected to the human heart to complete the transportation and circulation of blood in the human blood vessels and the magnetic diaphragm pump; a one-way valve controls the one-way flow of blood; the magnetic field generating system generates a uniform magnetic field along the axial direction of the magnetic diaphragm. The artificial heart pump device provided by the present invention has higher operation reliability and longer service life.

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.

The present application relates to a ventricular assist device. Apparatus and methods are described herein, including a blood pump (20) configured to be placed within a subject's body, the blood pump comprising an impeller (50) and a frame (34) disposed around the impeller, the impeller comprising proximal and distal bushings (64, 58), the frame comprising 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 subject's body and a non-radially constrained configuration in which the impeller (50) is configured to pump blood within the subject's body. The impeller (50) is changed 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.

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.

The embodiment of the present application provides a thrombus detection system and apparatus for a ventricular assist device, which relates to the technical field of medical devices. The system includes a thrombus detection device and a ventricular assist device. The ventricular assist device is implanted in the patient's heart through percutaneous intervention to assist the patient's heart in pumping blood. The thrombus detection device is used to detect whether there is a thrombus attached to the ventricular assist device. When the thrombus detection device detects thrombus attachment, it performs the following thrombus detection method: obtaining a back electromotive force fluctuation timing signal representing the motor back electromotive force fluctuation information during the operation of the ventricular assist device, and determining a target detection parameter; based on the back electromotive force fluctuation timing signal, using the target detection parameter, determining a target detection result representing whether there is a thrombus attached to the ventricular assist device. Applying the solution provided by this embodiment can achieve real-time detection of thrombus attachment.

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.

Mechanical circulatory supports configured to operate in series with the native heart are disclosed. In an embodiment, a centrifugal pump is used. In an embodiment, inlet and outlet ports are connected into the aorta and blood flow is diverted through a lumen and a centrifugal pump between the inlet and outlet ports. The supports may create a pressure rise between about 40-80 mmHg, and maintain a flow rate of about 5 L / min. The support may be configured to be inserted in a collinear manner with the descending aorta. The support may be optimized to replicate naturally occurring vortex formation within the aorta. Diffusers of different dimensions and configurations, such as helical configuration, and / or the orientation of installation may be used to optimize vortex formation. The support may use an impeller which is electromagnetically suspended, stabilized, and rotated to pump blood.

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.

A blood pump (1) comprises a pump casing (2) having a blood flow inlet (5) and a blood flow outlet (6) connected by a passage (7), and an impeller (3) arranged in said pump casing (2) so as to be rotatable about an axis of rotation (9). The impeller (3) is provided with blades (4) sized and shaped for conveying blood along the passage (7) from the blood flow inlet (5) to the blood flow outlet (6), the impeller (3) being rotatably supported in the pump casing (2) by at least one contact-type bearing (20) comprising a bearing surface of the impeller (3) facing a bearing surface of the pump casing (2). At least one wash out channel (30) extends through the impeller (3) and is in fluid connection with the passage (7) via a first opening (34) and with the bearing (20) via a second opening (35). The wash out channel (30) is operatively associated with a secondary pump for pumping blood through the wash out channel (30) towards the bearing (20), wherein the secondary pump is formed at least partially by said at least one wash out channel (30) extending through the impeller (3) along a direction having at least one tangential directional component.

Example percutaneous circulatory support devices are disclosed. Example percutaneous circulatory support devices includes a catheter including an elongate shaft and a percutaneous blood pump positioned at a distal end of the elongate shaft, the percutaneous blood pump including a blood inlet, a blood outlet, and an impeller assembly positioned therebetween to pump blood from the blood inlet to the blood outlet during use. Further, the example percutaneous circulatory support devices include lactate sensor configured to sense an amount of lactate in the blood.

Apparatus and methods are described including a left-ventricular assist device. A pump pumps blood from the subject's left ventricle to the subject's aorta, via a tube. A distal-tip element is disposed distally to the pump and defines a straight proximal portion that defines a longitudinal axis, and a curved distal portion that is shaped such as to curve in a first direction with respect to the longitudinal axis of the straight proximal portion before passing through an inflection point and curving in a second direction with respect to the longitudinal axis of the straight proximal portion, such that the curved distal portion defines a bulge on one side of the longitudinal axis of the straight proximal portion. Other applications are also described.