730results about "Circulatory assistance devices" patented technology

An introducer assembly includes an elongate sheath sized for insertion into a blood vessel of a patient and a hub. The hub can be coupled to a proximal portion of the sheath and can include a first hub portion and a second hub portion. The hub can include various features to facilitate breaking apart or separating the introducer assembly from a patient. For example, the first hub portion can have a first notch which can facilitate breaking, splitting, or fracturing the hub. The second hub portion can partially surround the first hub portion and can include two wings and an opening disposed above the first notch. The first hub portion can be formed from a first material and second hub portion can be formed from a second material. In some embodiments, the second material can be stiffer than the first material to facilitate fracturing the hub.

An intravascular heart pump assembly can include a rotor with at least one impeller blade, and a cannula. The present application describes various cannulas that can be manufactured from multiple layers of material to improve flexibility, manufacturability, and durability without increasing an outer diameter of the cannula. In one embodiment, the cannula includes an inflow section having a sheet formed of a shape memory material embedded within a polymer and having at least one lateral hole or aperture in the inflow section. The at least one lateral hole is defined by a first hole in the sheet and a second hole in the outer polymer layer of the cannula. The first hole and the second hole overlap so that blood can enter the cannula through the holes.

Systems and methods for determining the positioning of intracardiac devices, such as intracardiac blood pump assemblies, using electrical sensors configured to sense electrical potential as it propagates through the heart. In one example, the present technology provides an intracardiac device with one or more electrical sensors mounted thereon, and a controller configured to determine the absolute or relative location of the intracardiac device based on the timing, shape, and / or amplitude of the electrical signals received from the one or more sensors.

The invention relates to a line device (105) for conducting a blood flow for a heart support system. The heart support system has a head unit and an outlet unit. The line device (105) has a main part (205). The main part (205) has, at a first end, a first attachment section (210) for attaching the line device (105) to the head unit and, at a second end, a second attachment section (215) for attaching the line device (105) to the outlet unit. Furthermore, the main part (205) has a mesh section (220) between the attachment sections (210, 215), wherein the mesh section (220) has a mesh structure (230) formed from at least one mesh wire (225). In addition, the main part (205) has an inlet section (235), arranged in the first attachment section (210), for introducing the blood flow into the main part (205).

An intravascular blood pump may have a catheter (10) and a pumping device (1) attached to the catheter (10). The catheter (10) extends along a longitudinal axis and has a distal end (11) and a proximal end (12) opposite the distal end (11). The catheter (10) may have a tubular stiffening structure (15) extending longitudinally between the proximal end (12) and the distal end (11) of the catheter (10). The tubular stiffening structure (15) has a lumen (21) and a proximal end (17) and a closed distal end (16) opposite the proximal end (17), wherein the lumen (21) of the stiffening structure (15) is configured to receive a pressurized fluid having an over-pressure of at least 5 bar.

The approach presented here relates to an analysis device for analyzing a viscosity of a fluid. The analysis device comprises a detection device and a provisioning device. The detection device is formed to determine the viscosity of the fluid using at least one Doppler parameter of a Doppler spectrum of the fluid. The provisioning device is formed to provide or transmit a viscosity signal that represents the viscosity determined by the detection device.

An intravascular blood pump includes a pump housing having an input port and an output port. A relatively short intake cannula may draw blood in through an intake port and deliver the blood to the input port of the pump housing. The intake cannula is relatively short, to prevent excess hydraulic loss. An outflow hose is connected to the output port of the pump housing, so as to convey blood exiting the output port through the outflow hose in a downstream direction to a discharge port, e.g. into an aorta or other blood vessel. Despite the short intake cannula, the outflow hose longitudinally separates the intake port from the discharge port sufficiently so the intake port and the discharge port remain on opposite sides of a heart valve, despite inadvertent longitudinal shifts of the intravascular heart pump.

A medical treatment system, such as peritoneal dialysis system, may include control and other features to enhance patient comfort and ease of use. For example, a peritoneal dialysis system may include a control system that can adjust the volume of fluid infused into the peritoneal cavity to prevent the intraperitoneal fluid volume from exceeding a pre-determined amount. The control system can adjust by adding one or more therapy cycles, allowing for fill volumes during each cycle to be reduced. The control system may continue to allow the fluid to drain from the peritoneal cavity as completely as possible before starting the next therapy cycle. The control system may also adjust the dwell time of fluid within the peritoneal cavity during therapy cycles in order to complete a therapy within a scheduled time period. The cycler may also be configured to have a heater control system that monitors both the temperature of a heating tray and the temperature of a bag of dialysis fluid in order to bring the temperature of the dialysis fluid rapidly to a specified temperature, with minimal temperature overshoot.

A blood pump includes an impeller; a drive shaft coupled to the impeller and configured to rotate with the impeller; and a rotor coupled to the drive shaft and configured to rotate with the drive shaft. The rotor includes a driven magnet having an outer surface. A corrosion-resistant coating may be disposed on the outer surface of the driven magnet. A stator is disposed adjacent the rotor and configured to drive the rotor, causing the rotor to rotate; and a motor is configured to drive the stator. A protection assembly may be disposed adjacent the stator and configured to receive an end of the drive shaft, and may include a protection assembly housing enclosing a protective fluid chamber, the protective fluid chamber including the driven magnet and at least a portion of a bearing configured to engage the end of the drive shaft.

A guidewire for backloading and inserting a percutaneous pump affixed to a cannula includes a proximal section made of a first material, with a first diameter, a rounded proximal end, and a distal end. The guidewire also includes a distal section made of a second material, with a second diameter which is greater than the first diameter, a distal end, and a proximal end abutting the distal end of the proximal section. The first material of the proximal section is selected to be softer than a material of the percutaneous pump to reduce damage to the pump during backloading. The distal section of the guidewire is configured to be stiffer than the proximal section to insert the percutaneous pump in a desired location without damaging the guidewire.

According to the implantable magnetic suspension blood pump structure, an impeller is suspended in a containing cavity of a pump shell and can rotate around the central axis of the pump shell, and blood is sucked in from an inlet and discharged from an outlet; the motor comprises a motor stator assembly arranged in the pump shell and a rotor magnet array arranged on the impeller. The magnetic suspension device comprises an electromagnet arranged in the pump shell and a suspension magnet assembly arranged on the impeller, and electromagnetic suspension force provided by the electromagnet and passive permanent magnet bias suspension force provided by the suspension magnet assembly jointly maintain suspension balance of the impeller. The motor and the magnetic suspension device are independently controlled, so that the negative influence of low signal detection accuracy caused by magnetic field coupling is effectively reduced; the hybrid magnetic suspension structure reduces power consumption of the magnetic suspension device; the arrangement positions of the motor stator assembly and the electromagnet enable the blood pump to be compact in structure and reduce the size and weight; the gap and the position of the electromagnet and the suspension magnet assembly are accurately controlled, accurate control over the suspension position of the permanent magnet is achieved, and the pumping efficiency and stability of the blood pump are improved.

Systems and methods can involve manufacturing medical balloons with wedge dissectors for forming serrations within vascular wall tissue for angioplasty, wherein the systems and methods include improved methods of forming the wedge dissectors and attaching the wedge dissectors to the medical balloon as well as a central shaft to increase the cross ability of the catheter to cross lesions. The design, methods of use, intended outcomes, and process to build this type of balloon is described herein.

A device for providing a passage between a first and second heart chamber is provided. The device includes a middle region having first and second ends, a lumen extending therethrough having a longitudinal axis, a first end region coupled to the first end, and a second end region coupled to the second end. The first end region may be delivered in the first heart chamber in a compressed state and transitioned to a deployed state, the first end region being deformable such that portions of the first end region are expandable to different angles relative to the longitudinal axis. The second end region may be delivered in the second heart chamber in a compressed state and transitioned to a deployed state therein, the second end region being deformable such that portions of the second end region are expandable to different angles relative to the longitudinal axis.

The invention discloses an ECMO equipment operation state monitoring method, and belongs to the technical field of ECMO equipment operation state monitoring. The method comprises the following steps: firstly, collecting vibration signals of a blood pump at low, medium and high test rotating speeds through a vibration sensor; carrying out mean value removal processing on the signals, and carrying out weighted synthesis on low-frequency, intermediate-frequency and high-frequency fault enhancement signals based on frequency band energy; extracting an energy abnormal synthetic value and an extreme value abnormal synthetic value for the fault enhancement signal and the envelope signal thereof; respectively splicing the two types of abnormal composite values of different frequency bands to obtain an energy abnormal splicing matrix and an extreme value abnormal splicing matrix; and finally, processing the two matrixes by using an operation state evaluation neural network, outputting an operation state score of the blood pump, and realizing accurate monitoring of the operation state of the blood pump of the ECMO equipment.

A two-way valve and a pulsatile percutaneous ventricular assist device using same. The two-way valve comprises: a valve body (1) with an inner cavity (10) passing through, the inner cavity being provided with a proximal port (1a) and a distal port (1b), and the valve body (1) being provided with an open window (1c) in communication with the inner cavity (10) and the outside of the valve body (1); and a valve flap (2) arranged in the inner cavity (10) and rotationally connected to the valve body (1), the valve flap (2) comprising a first valve leaf (21), a second valve leaf (22), and a third valve leaf (23), which are connected at an obtuse angle, the first valve leaf (21) being arranged at the open window (1c), the second valve leaf (22) being arranged on one side close to the inner cavity (10) at one end of the first valve leaf (21) close to the proximal port (1a), and the third valve leaf (23) being arranged on one side close to the inner cavity at one end of the first valve leaf close to the distal port (1b). The valve flap (2) is impacted by blood flow axially flowing in the inner cavity (10) and is rotationally switched back and forth between an open position and a closed position. In the open position, the three valve leaves together partition the proximal port (1a) and the distal port (1b), and the open window (1c) is opened and in communication with the distal port (1b). In the closed position, the first valve leaf (21) closes the open window (1c), and the proximal port (1a) is in communication with the distal port (1b), thereby achieving better switching response and sealing effects.

The invention relates to a device (10) for inductive energy transmission into a human body (1), having a transmitter coil (24) and / or a receiver coil (14) having a first magnetic core (26) and a resonance or choke coil (16, 34) having a second magnetic core (32), wherein the first magnetic core (26) forms a part of the second magnetic core (32).

A method for assisting a heart ventricle can comprise providing a longitudinally expandable member that is reversibly expandable along a longitudinal dimension, wherein the longitudinally expandable member can include adjacent abutting portions meeting at respective bends that form acute angles along the longitudinal dimension. The method can include securing a first end portion of the longitudinally expandable member to a first wall portion of the heart ventricle via a first anchor engagement feature associated with the first end portion. The method can include securing a second end portion of the longitudinally expandable member to a second wall portion of the heart ventricle via a second anchor engagement feature associated with the second end portion, the plurality of bends between the first and second end portions allowing augmenting expansion of the heart ventricle using spring force of the longitudinally expandable member to thereby improve heart function.

A system and method for the installation and operation of a cardiac assist device. Flexible guides are advanced into a prepared space using minimally invasive techniques. A heart pump construct is advanced into position in the pericardial area along the flexible guides. Once in position, the heart pump construct is activated while still engaged with the flexible guides. The flexible guides provide structural integrity to the heart pump construct needed in order for the heart pump construct to function properly. The forces supplied to the heart by the heart pump construct are affected by the presence of the flexible guides. The structure of the flexible guides, the position of the flexible guides and the structure of the heart pump construct are customized to supply the forces needed by a particular heart in order to assist the heart in pumping more efficiently.

This disclosure is directed to systems and techniques for detecting change in patient health based upon peak and non-peak patient activity data. In some examples, the peak and non-peak patient activity data correspond to one or more peak (time) periods and the one or more non-peak periods, respectively, where at least one peak period and at least one non-peak period corresponds a highest activity level and a lowest activity level, respectively, for a single day. If a change in patient health is detected, the techniques described herein may direct a medical device to generate for display output indicating the detection of the change in patient health.

The invention relates to a heart premature beat detection device and method, a ventricular assist system, a storage medium and equipment, and the detection device comprises a first sampling module which is configured to collect operation data of a drive motor in a ventricular assist device, and the operation data at least comprise rotation speed data; the calculation module is configured to determine a current rotating speed maximum value and a historical average maximum value according to the rotating speed data; the judgment module is configured to judge that premature beat occurs when the current rotating speed maximum value is larger than the gear rotating speed and smaller than the historical average maximum value. Compared with a traditional premature beat detection mode, premature beat detection can be carried out in real time in the operation process of the percutaneous ventricular auxiliary device, and traditional external monitoring equipment such as electrocardiogram or color Doppler ultrasound does not need to be relied on any more.

Systems are provided including a sheath and cannula combination device for permitting a user to select between directing blood flow through a first cannula portion of the combination device in a cannula mode and enabling an interventional medical procedure through a second sheath portion of the combination device in a sheath mode, or performing both modes simultaneously. The combination device may include a connector hub configured to auto-washout stasis regions of blood within the first cannula portion. The system may include a series of removable caps for temporarily sealing the first and / or second portions of the combination device, such that the user may seamlessly select when to use the combination device in the cannula mode, the sheath mode, both the cannula and sheath modes simultaneously, or neither the cannula mode nor the sheath mode.

A device for providing a passage between a first and second heart chamber is provided. The device includes a middle region having first and second ends, a lumen extending therethrough having a longitudinal axis, a first end region coupled to the first end, and a second end region coupled to the second end. The first end region may be delivered in the first heart chamber in a compressed state and transitioned to a deployed state, the first end region being deformable such that portions of the first end region are expandable to different angles relative to the longitudinal axis. The second end region may be delivered in the second heart chamber in a compressed state and transitioned to a deployed state therein, the second end region being deformable such that portions of the second end region are expandable to different angles relative to the longitudinal axis.

The invention discloses a magnetic-coupling-driven auxiliary pressurization system for a paddle in a ventricle, relates to the technical field of medical instruments, and can solve a series of problems caused by integrated design of a motor and a paddle of an existing auxiliary pressurization device for the ventricle. The embodiment of the invention discloses a magnetic coupling driven heart chamber inner paddle auxiliary pressurization system which comprises a paddle part used for being sewn and fixed to the inner wall of a heart chamber and a driving part used for being sewn and fixed to the outer wall of the heart, and the paddle part comprises an inner sleeve, a paddle structure and a driven magnetic disc coaxially and fixedly connected with the paddle structure. The paddle structure is rotationally connected into the inner sleeve; the driving part comprises an outer sleeve, a driving motor and a driving magnetic disc coaxially and fixedly connected with an output shaft of the driving motor, and the driving motor is fixed in the outer sleeve; when the paddle part and the driving part are in a sewed and fixed state, the driven magnetic disk and the driving magnetic disk are coaxial and are magnetically coupled, and the paddle structure is driven by the driving motor to rotate through the driving magnetic disk and the driven magnetic disk which are magnetically coupled.

Disclosed in the present application is a catheter pump system. A measured intraventricular pressure and a measured intravascular pressure are measured by means of dual sensors, respectively, and an estimated intraventricular pressure is calculated by using the measured intravascular pressure, a motor current, and a motor rotation speed. When it is determined that a suction event occurs in a pump assembly by using at least one of the estimated intraventricular pressure, the measured intravascular pressure, and the motor current, the root cause of the suction event is further determined by using the positive or negative characteristics of the measured intraventricular pressure.

The invention relates to a mounting tray for disposable consumables and equipment applied to blood component separation, and belongs to the field of blood component separation, the mounting tray comprises a tray main body, a peripheral frame, a blood pipeline pump mounting port, a dropper fixing groove, an instrument plug-in positioning block, a bunching port and a monitoring unit box digging hole, the peripheral frame is arranged on the periphery of the tray main body, and the blood pipeline pump mounting port is arranged on the periphery of the tray main body; a blood pipeline pump mounting opening is formed in the tray main body, a dropper fixing groove is formed in the upper edge of the peripheral frame, an instrument plug-in positioning block is arranged in the tray main body, a bunching opening is formed in the lower edge of the peripheral frame, and a monitoring unit box digging hole is further formed in the tray main body. All parts of the disposable consumable are accurately positioned, the two parts are more accurately matched, the installation is more convenient, and the problems that the total time for installation operation is long, the working efficiency is influenced, and financial resources and material resources are wasted due to the fact that the blood component separation process is abnormal due to manual installation errors are solved.

The invention provides a cannula capable of effectively and smoothly conveying blood from the ascending aorta while reducing the diameter of the cannula. And the front end part of the cannula is retained in the ascending aorta and is used for smoothly conveying blood supplied by the in-vitro artificial membrane lung from the ascending aorta. The cannula comprises a forward blood backflow part (2) and a blood delivery tube (4), wherein the forward blood backflow part (2) is arranged at the front end of the blood delivery tube (4). A guide wire tube (5) which longitudinally extends from a base end part to a front end part is arranged at a near-center position of the axial length in the smooth blood feeding sleeve (1). The blood delivery tube (4) is a catheter arranged on the base end side and used for being connected with the in-vitro artificial membrane lung. The forward blood return unit (2) reverses blood from a reverse direction to a forward direction and guides the blood to the base end side, and is provided with a first blood return tube (6) provided on the base end side and a second blood return tube (7) provided on the tip side. The second blood return tube (7) has side holes (7a, 7b), and a part of an approximately hemispherical bag body (8) is adhered to the inner portion of the tip of the second blood return tube (7).

Provided is a magnetic thin film robot, which comprises a cardiac outer wrapping film module and a control module connected to each other. The cardiac outer wrapping film module comprises a non-magnetic supporting part and a magnetic driving part, and the non-magnetic supporting part and the magnetic driving part are mutually coupled. The control module comprises a patch-type magnetic field generator and a power supply assembly connected to each other, and the magnetic field generator in vitro corresponds to the magnetic driving part in vivo in terms of space. A magnetic field is generated through the control module, and the magnetic field drives the cardiac outer wrapping film module to provide heart failure assistance.

The utility model relates to a blood pumping catheter and a ventricular assist system.The blood pumping catheter comprises a perfusion cavity, a perfusion pipeline, an elastic element and a first flow adjusting component, the far end of the perfusion pipeline is connected to the perfusion cavity, the elastic element and the first flow adjusting component are both installed on the perfusion pipeline, and the first flow adjusting component is located between the elastic element and the perfusion cavity; the first preset value is larger than or equal to zero, and the first flow adjusting component is in a cut-off state under the condition that the difference value between the near-end-side pressure of the first flow adjusting component and the far-end-side pressure of the first flow adjusting component is smaller than the first preset value. According to the embodiment of the invention, the blood loss of a patient can be reduced, and the risk of thrombus formation and blockage in the perfusion device and the blood pumping catheter is reduced, so that the operation stability and the operation life of the perfusion pipeline on the near end side of the perfusion device and the blood pumping catheter can be relatively improved.

The embodiment of this specification relates to a position-controlled suspension centrifugal blood pump, which is a "pump-motor integrated" device. The blood pump includes: a pump housing, a rotor, an impeller, a servo motor, an inner magnetic core group, an outer magnetic ring group, and a position-control bearing; the rotor and the impeller are seamlessly connected. The rotor is arranged in the inner tube of the blood pump and is driven by the servo motor to drive the impeller to do work; the inner magnetic core group is composed of multiple round magnetic pieces and is built in the top end inside the rotor. The outer magnetic ring group is composed of multiple magnetic rings and is sleeved on the outer wall of the inner tube; the position-control bearing is composed of ceramic balls and ceramic sockets. The top end of the impeller blade has an inclined surface, which can generate hydrodynamic pressure when the pump is working. According to the technical solution of the present invention, the rotor and the impeller can be position-controlled and suspended in all directions, overcoming the friction effect of mechanical bearings. The internal structure of the pump is simple and smooth, which can greatly reduce hemolysis and thrombus complications; the blood pump is small in size and light in weight, with less surgical invasiveness, and can improve safety and practicability.

A device may include a control element coupled to a valve disposed in an outer frame. The control element is configured to manipulate the valve between an unrestricted blood flow state and a restricted blood flow state. A device may include an actuation device including a linear actuator coupled to a control element of an implantable device, and a first magnet configured to induce rotation of the linear actuator. A control device communicatively coupled to the linear actuator includes a second magnet configured to generate a changing magnetic field pole direction to cause rotation of the first magnet either to tension the control element to position a valve of the implantable device in a restricted blood flow state or to release tension in the control element to position the valve in an unrestricted blood flow state.