75 results about "Pump blood" patented technology

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.

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).

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.

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.

The invention discloses a control method, device and system of a ventricular assist system. The method comprises the steps that a first pressure difference between the two ends of a catheter assembly and a first motor parameter of a blood pumping motor under the condition of preset blood pumping flow are obtained; the actual blood pumping flow of a blood pumping motor is determined based on the first pressure difference and the preset blood pumping flow; correcting the preset blood pumping flow according to the actual blood pumping flow and the heart blood pumping flow of a target object to obtain a target blood pumping flow; adjusting the first motor parameter according to the target pump blood flow to obtain a target motor parameter; and controlling a blood pumping assembly to operate according to the target motor parameters. According to the embodiment of the invention, the operation parameters of the blood pumping motor can be adjusted in real time according to the blood pumping capacity, so that the response speed, stability and robustness of the blood pumping motor are improved, and the threat of the blood pumping motor to the life of a patient is reduced.

This application provides a ventricular assist interventional system, relating to the field of medical device technology, comprising a diaphragm pump, a first catheter, a balloon, and a pneumatic actuator. A balloon for implantation into the descending aorta to assist the heart is disposed on the surface between a bidirectional valve on the first catheter and the proximal end of the first catheter. The distal end of the first catheter is inserted into the ventricle. The balloon is connected to the pneumatic actuator via an air circuit. The proximal end of the first catheter is connected to the blood chamber of the diaphragm pump, and the medium chamber of the diaphragm pump is connected to the pneumatic actuator via an air circuit. A single pneumatic actuator simultaneously drives the diaphragm pump to aspirate or pump blood and to inflate or deflate the balloon. The inflation and deflation cycle of the balloon is synchronized with the diaphragm pumping action, thereby precisely corresponding to the systolic and diastolic phases of the heart. This reduces the number of components used in the ventricular assist interventional system and improves the technical problem of existing ventricular assist interventional systems being bulky and easily increasing the burden on patients.

The invention discloses a filling type catheter and a ventricular auxiliary device, and belongs to the technical field of medical instruments. The catheter in the aorta comprises a multi-cavity catheter body, a first cavity and a second cavity which are isolated from each other are arranged in the catheter body, a blood inlet is formed in the proximal end of the first cavity and communicated with blood in the aorta, and medium fluid flows in the second cavity and is not communicated with the blood. A bleeding part is arranged on the multi-cavity tube body and comprises a bleeding hole formed in the tube wall and a balloon which can be filled and is located on the side, close to the heart end, of the bleeding hole. The fillable balloon is communicated with the second cavity through an extension pipeline with supporting performance, when the fillable balloon is in the first state, the filling medium is bulged and blocks the sealed bleeding hole, and when the fillable balloon is in the second state, the non-filling medium is away from the bleeding hole and opens the bleeding hole to enable blood to flow out. The ventricular auxiliary device further comprises a diaphragm pump and a control host, and the control host drives the diaphragm pump to suck or pump blood and controls the full balloon to expand or contract. Accurate control of blood flow is achieved through the controllable balloon, and effective auxiliary circulation support is provided for patients with heart diseases.

The application provides a ventricular assist pump blood instrument and system, and relates to the technical field of medical instruments.The ventricular assist pump blood instrument comprises an in-vivo component, the in-vivo component comprises a support cover and an impeller mechanism; the in-vivo component has a folded state and an unfolded state, when being arranged at a position where the aorta is connected with the left ventricle or in the left ventricle, the in-vivo component is arranged in the unfolded state, a blood flow channel is formed by the covering film and the support cover, the impeller mechanism is rotated to increase the pressure of the blood in the blood flow channel, and then the in-vivo component can be used as a blood pump to promote the blood flow in the left ventricle to the aorta; meanwhile, the in-vivo component has a folded state, in the folded state, the impeller mechanism and the support cover are folded, the volume is small, the in-vivo component can be implanted into the position where the aorta is connected with the left ventricle or the left ventricle through a catheter, and a thoracotomy operation is not needed, so that the operation time is short, the trauma is small, and the patient recovers quickly.

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 mechanical circulatory support system may include a blood pump and a cannula extending distally from the blood pump. The blood pump may include a motor and an impeller assembly in communication with the motor. The impeller assembly may be configured to pump blood from a left ventricle of a heart to an aorta in response to actuation of the motor. The cannula may include a first bend configured to be located proximal of an aortic valve of the patient when the impeller assembly is pumping blood from the left ventricle to the aorta and a second bend configured to be distal of the aortic valve when the impeller assembly is pumping blood from the left ventricle to the aorta.

The invention relates to a left ventricle auxiliary device and an implantation assembly. The left ventricle auxiliary device comprises a small and special electric machine and a housing with a blood channel, the small and special motor comprises a shell and a pump machine body, the pump machine body is provided with a motor shaft, pump blades are arranged on the motor shaft, and the motor shaft extends out of the shell and extends into the housing; the shell is provided with a rear cover, the inner end of the wire penetrates through the rear cover to be electrically connected with the pump machine body, and the outer end of the wire is electrically connected with an external power supply control device. The housing comprises a pumping-in cover, a transition pipe and a pumping-out cover, the pumping-in cover is provided with a blood suction hole, and the pumping-out cover is provided with a blood discharge hole; a first suction cup and a second suction cup are arranged outside the shell, and a third suction cup and a fourth suction cup are arranged outside the transition pipe. The left ventricle auxiliary device can be implanted into a body through the implantation assembly. The left ventricle auxiliary device is simple and small in structure, implantation can be completed through percutaneous puncture by means of the implantation assembly, blood can be pumped into the ascending aorta from the left atrium through a blood channel, and the left ventricle auxiliary function is achieved.

The invention relates to the technical field of artificial hearts, in particular to a physical intelligent artificial heart and a control method thereof.The physical intelligent artificial heart is characterized in that an LCE balloon of a double-layer structure is made of an LCE material, circuits winding the LCE balloon are additionally arranged in two layers of LCE films respectively, power is provided for jumping of the LCE balloon on the basis of the electrothermal effect, and the LCE balloon is made of an elastic material. Meanwhile, periodic circulation of pumped-in or pumped-out blood of the left ventricle is realized by combining an aortic valve one-way valve and a bicuspid pulse valve one-way valve, so that the dynamic beating characteristics of the left ventricle participating in a human blood circulation system are simulated. The method has the advantages of high efficiency and convenience through theoretical simulation analysis of heart chaos self-excitation beating, compared with an experiment and observation method, left ventricle dynamic beating characteristics participating in a human blood circulation system can be quickly simulated, application of chaos dynamics in the fields of artificial hearts, medical instruments and the like can be promoted, and the method is suitable for popularization and application. And theoretical support is provided for early diagnosis of cardiovascular diseases.

A catheter pump (1000) and mold, the catheter pump (1000) includes a catheter (201) and a pump head (205), the pump head (205) is delivered to a desired location in heart via the catheter (201) to pump blood; the pump head (205) includes a pump housing (2051) and an impeller (2052) housed within the pump housing (2051), the pump housing (2051) has a blood inlet port (2051a) and a blood outlet port (2051b). The pump housing (2051) includes a stent (20511) which is operable to switch between a radially collapsed state and a radially expanded state; in the radially expanded state, the stent (20511) includes a main body portion (11), an inlet portion (12) located at an axial distal end of the main body portion (11), and an outlet portion (13) located at an axial proximal end of the main body portion (11), the inlet portion (12) and the outlet portion (13) are both connected with the main body portion (11) and support the main body portion (11); a proximal end of the outlet portion (13) is connected with a proximal connecting portion (14), a distal end of the inlet portion (12) is connected with a distal connecting portion (15). At least one of the proximal connecting portion (14) and the distal connecting portion (15) includes a preformed member (16); in a natural state where the stent (20511) is not assembled to the catheter pump (1000), a radial distance from an inner end of the preformed member (16) to a central axis (17) of the stent (20511) is less than a radial distance from an outer end of the preformed member (16) to the central axis (17) of the stent (20511).

Apparatus and methods are described, including methods for manufacturing a blood pump, the methods comprising inserting an impeller (50) into a frame (34), the impeller (50) configured to pump blood of a subject, the frame (34) comprising a proximal portion, a central portion, and a frustoconical distal portion (40). A pump outlet tube (24) is secured on the proximal portion of the frame and on at least a portion of the central portion of the frame. One or more blood inlet openings (108) are formed in the sheet of material (144). After forming the blood inlet opening (108), the sheet of material (144) is rolled to form a frustoconical inlet shield (145). An inlet guard (145) is coupled to the pump outlet tube and secured to the distal portion (40) of the frame. Other applications are also described.

The application discloses a blood pressure calculation method and equipment based on cross-scale fluid-solid coupling and considering nonlinear biomechanical characteristics of an aorta, and the method comprises the following steps: establishing a three-dimensional ideal aorta geometric model; establishing a zero-dimensional heart lumped parameter model to simulate the process that the heart pumps blood to the aorta inlet through periodic contraction and diastole; establishing a zero-dimensional three-element Windkessel model of small arteries to simulate blood flow microcirculation of peripheral small arteries; establishing a blood vessel wall biomechanical model containing residual stress of the aorta wall and active contraction of smooth muscle cells to obtain a pressure-radius relationship of the aorta wall as a fluid wall boundary condition to simulate the change process of the aorta radius in blood circulation; and coupling the three-dimensional ideal geometric model of the aorta, the zero-dimensional heart lumped parameter model and the zero-dimensional three-element Windkessel model to construct a cross-scale fluid-solid coupling system of hemodynamics, and the blood pressure in the aorta is calculated through iterative solution.

The utility model discloses a fixing device of an interventional catheter pump, the interventional catheter pump comprises a catheter, a driving assembly connected to the near end of the catheter and a pump head connected to the far end of the catheter, and the driving assembly is used for driving the pump head to operate so as to pump blood; the fixing device comprises a base for bearing the driving assembly; the mounting parts are arranged on two opposite sides of the base; the base and the mounting part form an accommodating space of the driving assembly; the clamping mechanism is arranged on at least one of the two mounting parts and is used for operably fixing the driving assembly on the base; the clamping mechanism comprises a clamping end located on the side, facing the containing space, of the installation part and an execution component located on the side, away from the containing space, of the installation part. The clamping end is configured to move towards or away from the driving assembly when the execution component is operated so as to clamp or release the driving assembly.