Coupling System, Applicator Tool, Attachment Ring and Method for Connecting a Conduit to Biological Tissue
Granted: April 26, 2018
Application Number:
20180110514
A coupling system includes an applicator tool and an attachment ring mounted on the applicator tool. Clips are contained within the applicator tool and are deployed through the attachment ring in order to anchor the attachment ring to biological tissue. When deployed, tips of the clips follow a curved trajectory through an annular cuff of the attachment ring and through the underlying tissue. The tips loop back out of the tissue and to a location where they are later trapped or clamped…
Rotary Blood Pump With Opposing Spindle Magnets, Bore And Drive Windings
Granted: April 13, 2017
Application Number:
20170100528
Various “contactless” bearing mechanisms including hydrodynamic and magnetic bearings are provided for a rotary pump as alternatives to mechanical contact bearings. In one embodiment, a pump apparatus includes a pump housing defining a pumping chamber. The housing has a spindle extending into the pumping chanber. A spindle magnet assembly includes first and second magnets disposed within the spindle. The first and second magnets are arranged proximate each other with their respective…
Methods Of Operating A Rotary Blood Pump
Granted: March 23, 2017
Application Number:
20170082114
Various “contactless” bearing mechanisms including hydrodynamic, hydrostatic, and magnetic bearings are provided for a rotary pump as alternatives to mechanical contact bearings. These design features may be combined. In one embodiment, the pump apparatus includes a rotor having a bore, a ring-shaped upper rotor bearing magnet, and a ring-shaped lower rotor bearing magnet. The bearing magnets are concentric with the bore. The lack of mechanical contact bearings enables longer life…
Rotary Blood Pump
Granted: February 16, 2017
Application Number:
20170043076
The present invention provides a rotary blood pump with both an attractive magnetic axial bearing and a hydrodynamic bearing. In one embodiment according to the present invention, a rotary pump includes an impeller assembly supported within a pump housing assembly by a magnetic axial bearing and a hydrodynamic bearing. The magnetic axial bearing includes at least two magnets oriented to attract each other. One magnet is positioned in the spindle of the pump housing while the other is…
START-UP ALGORITHM FOR AN IMPLANTABLE BLOOD PUMP
Granted: November 17, 2016
Application Number:
20160331881
A system and a method for starting a rotor of an implantable blood pump are described. For example, a blood pump system includes a rotary motor having a stator and a rotor. The rotor has permanent magnetic poles for magnetic levitation of the rotor, and the stator has a plurality of pole pieces arranged circumferentially at intervals. The blood pump system includes a controller configured to control a start phase of the rotor, wherein the start phase is prior to the rotor being…
CATHETER PUMP ASSEMBLY INCLUDING A STATOR
Granted: February 4, 2016
Application Number:
20160030649
A catheter pump assembly is provided that includes a proximal a distal portion, a catheter body, an impeller, and a flow modifying structure. The catheter body has a lumen that extends along a longitudinal axis between the proximal and distal portions. The impeller is disposed at the distal portion. The impeller includes a blade with a trailing edge. The flow modifying structure is disposed downstream of the impeller. The flow modifying structure has a plurality of blades having a…
PROTECTIVE CAP FOR DRIVELINE CABLE CONNECTOR
Granted: October 15, 2015
Application Number:
20150290377
A protective cap for fluidly sealing a connector of a cable is provided. The protective cap includes a flexible body having an interior cavity with a distal opening through which the connector is inserted. The distal opening is defined by an annular ridge that engages a cable portion proximal the connector to fluidly seal the entire connector within the cavity. The body portion may have an oval-shaped cross-section while the interior cavity is cylindrical so that the portions wider…
IMPELLER FOR CATHETER PUMP
Granted: April 9, 2015
Application Number:
20150099922
An impeller for a pump is disclosed herein. The impeller can include a hub having a fixed end and a free end. The impeller can also have a plurality of blades supported by the hub. Each blade can have a fixed end coupled to the hub and a free end. The impeller can have a stored configuration and a deployed configuration, the blades in the deployed configuration extending away from the hub, and the blades in the stored configuration being compressed against the hub.
CENTRIFUGAL PUMP APPARATUS
Granted: January 15, 2015
Application Number:
20150017030
In this centrifugal blood pump apparatus, one permanent magnet is provided in one surface of an impeller, a second permanent magnet is provided in an inner wall of a blood chamber, a third permanent magnet is provided in the other surface of the impeller, and a fourth permanent magnet and a rotor for driving the impeller to rotate are provided, with an diaphragm being interposed. An amount of change in attractive force between the first permanent magnet and the second permanent magnet…
VERIFICATION OF MAGNETIC BALANCE FOR MAGNETICALLY LEVITATED IMPELLER
Granted: October 9, 2014
Application Number:
20140298905
The magnetic balance is verified of a magnetically-levitated impeller of a centrifugal pump with a pump housing having levitation magnets. The impeller includes embedded magnets and is movable within a chamber in the pump housing between first and second sides of the chamber. The centrifugal pump is mounted on an acceleration fixture while the impeller is held against a predetermined one of the first and second sides by the levitation magnets. A plurality of predetermined accelerations…
PERCUTANEOUS CABLE WITH REDUNDANT CONDUCTORS FOR IMPLANTABLE BLOOD PUMP
Granted: September 25, 2014
Application Number:
20140288352
A blood pump system for left ventricle assist has an implantable pump unit having a multiphase stator having a plurality of windings connected between respective junctions for forming first, second, and third phases. An external control unit comprises an H-bridge inverter having first, second, and third phase legs. A percutaneous cable is provided having first, second, and third parallel pairs of redundant conductors. Each conductor pair is connected between a respective phase leg and a…
CATHETER PUMP ASSEMBLY INCLUDING A STATOR
Granted: September 18, 2014
Application Number:
20140275726
A catheter pump assembly is provided that includes a proximal a distal portion, a catheter body, an impeller, and a flow modifying structure. The catheter body has a lumen that extends along a longitudinal axis between the proximal and distal portions. The impeller is disposed at the distal portion. The impeller includes a blade with a trailing edge. The flow modifying structure is disposed downstream of the impeller. The flow modifying structure has a plurality of blades having a…
FLUID HANDLING SYSTEM
Granted: September 18, 2014
Application Number:
20140275725
Various embodiments of a fluid handling system are disclosed herein. For example, the fluid handling system can include a catheter assembly and a console configured to control the operation of the catheter assembly. A removable interface member can be configured to provide fluid and electrical communication between the catheter assembly and the console.
BLOOD PUMP ROTOR BEARINGS
Granted: September 18, 2014
Application Number:
20140275722
A bearing assembly for use in a blood pump includes a first component that has a convex bearing surface and a first outer surface proximate the convex bearing surface. The bearing assembly includes a second component that a concave bearing surface and a second outer surface proximate the concave bearing surface, the concave bearing surface being configured to receive the convex bearing surface. A plurality of grooves are defined through the convex bearing surface and first outer surface…
Centrifugal Blood Pump With Partitioned Implantable Device
Granted: September 18, 2014
Application Number:
20140275721
A centrifugal blood pump system has a self-contained pumping unit and a self-contained motor unit. A pump outlet extends radially from a pump housing of the pumping unit. A percutaneous cable passes through a radial exit from a motor housing of the motor unit. The motor housing has a substantially planar face configured to mate with a substantially planar face of the pump housing. The pumping unit and the motor unit are configured to latch together in a plurality of orientations, each…
PROGRAMMING OF BACKUP CONTROL UNIT FOR CARDIAC ASSIST SYSTEM
Granted: August 28, 2014
Application Number:
20140243970
Upon failure of a primary control unit for controlling an implanted pump in a ventricle assist system enhancing blood flow in a patient, an initial backup control unit is substituted for the failed unit. An interface device is connected to one of the initial backup control unit or the primary control unit. Patient-unique data is downloaded to the interface device to create a transfer data set. The initial backup control unit is connected to the implanted pump as a new primary control…
STARTUP SEQUENCE FOR CENTRIFUGAL PUMP WITH LEVITATED IMPELLER
Granted: August 28, 2014
Application Number:
20140241904
A centrifugal pump system having an impeller rotating with first and second magnetic structures on opposite surfaces. A levitation magnetic structure is disposed at a first end of a pump housing having a levitating magnetic field for axially attracting the first magnetic structure. A multiphase magnetic stator at a second end of the pump housing generates a rotating magnetic field for axially and rotationally attracting the second magnetic structure. A commutator circuit provides a…
Generating Artificial Pulse
Granted: August 21, 2014
Application Number:
20140235931
In order to produce a pulsatile blood flow pattern that includes time periods of relatively high blood flow rates and time periods of relatively low blood flow rates, the operating speed of a blood pump can be selectively controlled to produce an operating speed pattern that includes time periods of relatively high rotation speeds and periods of relatively low rotation speeds. For example, the blood pump is rotated at a first speed for a first period of time. The speed of the blood pump…
DRIVELINE CABLE ASSEMBLY
Granted: August 21, 2014
Application Number:
20140235930
A blood pump assembly includes a blood pump configured for implantation and a cable assembly for providing power and control signals to the blood pump. The cable assembly includes a strain relief assembly and a driveline. The strain relief assembly secures the cable assembly to the blood pump and has an outer surface that is curved along a longitudinal extent of the strain relief assembly at least along an outer peripheral side of the outer surface. The strain relief assembly defines a…
IMPELLER POSITION COMPENSATION USING FIELD ORIENTED CONTROL
Granted: July 24, 2014
Application Number:
20140205467
A centrifugal pump system having an impeller rotating with first and second magnetic structures on opposite surfaces. A levitation magnetic structure is disposed at a first end of a pump housing having a levitating magnetic field for axially attracting the first magnetic structure. A multiphase magnetic stator at a second end of the pump housing generates a rotating magnetic field for axially and rotationally attracting the second magnetic structure. A commutator circuit provides a…
