# US 2014/0194985 A1 · Controller and power source for implantable blood pump > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0194985 A1 - Document ID: US20140194985A1 - Status: Published application - Kind: A1 - Application number: 14/133,905 - Filed: 2013-12-19 - Published: 2014-07-10 - Earliest claimed: 2013-01-04 - Assignees: HeartWare, Inc. - Applicants: HeartWare, Inc. - Inventors: Charles Joseph Vadala, JR. - Web page: https://patentgrep.com/patent/US20140194985A1 ## CPC - G06F 1/3212: Monitoring battery levels, e.g. power saving mode being initiated when battery voltage goes below a certain level - A61M 60/178: drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices - A61M 60/216: including a rotating member acting on the blood, e.g. impeller - A61M 60/411: generated by an electromotor - A61M 60/508: Electronic control means, e.g. for feedback regulation - A61M 60/876: Implantable batteries - G06F 1/263: {Arrangements for using multiple switchable power supplies, e.g. battery and AC (G06F1/30 takes precedence)} - A61M 60/148: in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices - A61M 2205/18: with alarm - A61M 2205/44: making noise when used incorrectly - A61M 2205/50: with microprocessors or computers - A61M 2205/502: User interfaces, e.g. screens or keyboards - A61M 2205/52: with memories providing a history of measured variating parameters of apparatus or patient - A61M 2205/8206: battery-operated - A61M 2205/8262: connectable to external power source, e.g. connecting to automobile battery through the cigarette lighter - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract Methods and apparatus for controlling the operation of, and providing power for and to, implantable ventricular assist devices which include a brushless DC motor-driven blood pump, are disclosed. In one embodiment, a control system for driving an implantable pump is provided. The digital processor is responsive to data associated with the operation of the pump received at the data transfer port, and from the program data stored in memory, (i) to determine therefrom, the identity of the pump, (ii) to determine therefrom, electrical characteristics and features of the identified pump, and (iii) to adaptively generate and apply to the data port, control signals for driving the identified pump. Latch mechanisms, an elongated flexible electrical cable with a strain relief segment, and a lower housing portion that is heavier than an upper housing portion, may also be provided with the control system. ## Claims ### Claim 1 A control system for driving an implantable blood pump comprising: a first housing including electronic components configured to drive the pump; and a second housing including a battery; wherein the first housing includes a first latch member extending from the first housing on a first side of the first housing and first and second recesses on a second side of the first housing; wherein the second housing includes a third recess on a first side of the second housing and second and third latch members extending from the second housing on a second side of the second housing; wherein when the first side of the first housing is aligned with the first side of the second housing, the first latch member aligns with the third recess, the second latch member aligns with the first recess, and the third latch member aligns with the second recess. ### Claim 2 (depends on 1) The control system of claim 1, wherein the second and third latch members each include a bottom connected to the second housing and a top curving away from the first side of the second housing. ### Claim 3 (depends on 1) The control system of claim 1, further comprising a release button operatively connected to the first latch member and having a locked position and a release position. ### Claim 4 (depends on 3) The control system of claim 3, wherein depressing the release button transitions the first latch member from the locked position to the release position. ### Claim 5 (depends on 1) The control system of claim 1, further comprising an elongated flexible electrical cable having a first end and a second end remote from the first end, the first end being connected to the control system and the second end being configured to connect to the implantable blood pump. ### Claim 6 (depends on 5) The control system of claim 5, wherein the elongated flexible electrical cable has a stress relief segment between the first and second ends. ### Claim 7 (depends on 6) The control system of claim 6, wherein the stress relief segment comprises a stretchable section. ### Claim 8 (depends on 7) The control system of claim 7, wherein the stretchable section has a helical shape. ### Claim 9 (depends on 8) The control system of claim 8, wherein the elongated flexible electrical cable has a length of between approximately 3.5 feet and 4 feet when the helical-shaped strain relief segment is fully uncoiled. ### Claim 10 (depends on 1) The control system of claim 1, wherein the first housing and the second housing each have a mass, the mass of the first housing being less than the mass of the second housing. ### Claim 11 A control system for driving an implantable blood pump comprising: an internal battery; an external battery; and a processor configured to perform an estimation of a remaining run time of the internal and external batteries; wherein the estimation includes determining a remaining capacity of the internal battery, determining a remaining capacity of the external battery, determining a consumption rate of the internal battery, and determining a consumption rate of the external battery. ### Claim 12 (depends on 11) The control system of claim 11, wherein determining the remaining capacity of the external battery includes determining a value of the remaining capacity of the internal battery and modifying the value of the remaining capacity of the internal battery to account for a loss in efficiency when the external battery charges the internal battery. ### Claim 13 (depends on 12) The control system of claim 12, wherein the loss in efficiency is estimated at approximately 10%. ### Claim 14 (depends on 11) The control system of claim 11, wherein determining the consumption rate of the external battery includes multiplying an average current of the external battery and an average voltage of the external battery. ### Claim 15 (depends on 11) The control system of claim 11, wherein determining the consumption rate of the external battery includes using a most recently stored value, wherein the most recently stored value is calculated by multiplying an average current of the external battery and an average voltage of the external battery. ### Claim 16 (depends on 11) The control system of claim 11, wherein determining the consumption rate of the external battery includes selecting a value based on a speed of the implantable pump and a hematocrit setting entered into the control system. ### Claim 17 (depends on 16) The control system of claim 16, wherein the selected value is stored in a table in memory of the control system. ### Claim 18 A control system for driving an implantable blood pump comprising: a first housing including electronic components configured to drive the pump; speakers; and a vibrating mechanism; wherein the vibrating mechanism vibrates during a first interval following the detection of an alarm condition, wherein the speakers sound an audible alarm during a second interval following the detection of the alarm condition, wherein the first interval precedes the second interval, wherein the speakers are silent during the first interval.