Patent Application
20220062514
n/a.
The present technology is generally related to implantable blood pumps, and in particular, a method and control circuit for starting a stopped pump.
There are various reasons as to why an implantable blood pump may be stopped. For example, there may be a clinician initiated stop or either power from an internal battery of the controller or transcutaneous energy transfer system (TETS) power is unavailable. In the case of a stopped pump, a pump restart command initiated by the controller may attempt to restart the pump. However, automatically restarting the pump after a prolonged period of time may be undesirable due to thrombus formation within the pump or within the heart, for example.
The techniques of this disclosure generally relate to implantable blood pumps, and in particular, a method and control circuit for starting a stopped pump.
In one aspect, the present disclosure provides a method of controlling operation of an implantable blood pump. The method includes attempting to restart a stopped implantable blood pump for a predetermined number of attempts with either power from an internal battery of a controller in communication with the implantable blood pump or transcutaneous energy transfer system (TETS) power in communication with the internal battery and the implantable blood pump. Following the predetermined number of attempts, the method includes pausing attempting to restart the implantable blood pump and begin attempting to recharge the internal battery with TETS power.
In another aspect of this embodiment, the predetermined number of attempts is at least 10.
In another aspect of this embodiment, if internal battery power sufficient to attempt to restart the pump becomes available following the predetermined number of attempts, the method further includes attempting to restart the stopped implantable blood pump.
In another aspect of this embodiment, if a new power source becomes available following the predetermined number of attempts, the method further includes attempting to restart the stopped implantable blood pump with the new power source.
In another aspect of this embodiment, if within thirty minutes from a last of the predetermined number of attempts, internal battery power sufficient to attempt a start of the implantable blood pump become available, the method further including attempting to restart the implantable blood pump at least two more times with internal battery power.
In another aspect of this embodiment, if a clinician entered command to restart the pump is initiated following the last of the predetermined number of attempts, the method further including attempting to restart the implantable blood pump.
In another aspect of this embodiment, if internal battery power sufficient to restart the implantable blood pump becomes available during any of the predetermined number of attempts, the method further includes attempting to restart the implantable blood pump using internal battery power only.
In another aspect of this embodiment, the implantable blood pump is a ventricular assist device.
In another aspect of this embodiment, the controller is an implanted controller.
In one aspect, a control circuit for an implantable blood pump includes processing circuitry configured to attempt to restart a stopped implantable blood pump for a predetermined number of attempts with either power from an internal battery of a controller in communication with the implantable blood pump or transcutaneous energy transfer system (TETS) power in communication with the internal battery and the implantable blood pump and following the predetermined number of attempts, pause attempting to restart the implantable blood pump and begin attempting to recharge the internal battery with TETS power.
In another aspect of this embodiment, the predetermined number of attempts is at least 10.
In another aspect of this embodiment, if internal battery power sufficient to attempt to restart the pump becomes available following the predetermined number of attempts, the processing circuitry is further configured to attempt to restart the stopped implantable blood pump.
In another aspect of this embodiment, if a new power source becomes available following the predetermined number of attempts, the processing circuitry is further configured to restart the stopped implantable blood pump with the new power source.
In another aspect of this embodiment, if within a predetermined amount of time from a last of the predetermined number of attempts, internal battery power sufficient to attempt a start of the implantable blood pump become available, the processing circuitry is further configured to attempt to restart the implantable blood pump at least two more times with internal battery power.
In another aspect of this embodiment, if a clinician entered command to restart the pump is initiated following the last of the predetermined number of attempts, the processing circuitry is further configured to attempt to restart the implantable blood pump.
In another aspect of this embodiment, if internal battery power sufficient to restart the implantable blood pump becomes available during any of the predetermined number of attempts, the processing circuitry is further configured to attempt to restart the implantable blood pump using internal battery power only.
In another aspect of this embodiment, wherein the implantable blood pump is a ventricular assist device.
In another aspect of this embodiment, wherein the controller is an implanted controller.
In another aspect of this embodiment, wherein the predetermined number of attempts is more than two.
In one aspect, a control circuit for an implantable blood pump includes processing circuitry configured to attempt to restart a stopped implantable blood pump for ten attempts with either power from an internal battery of a controller in communication with the implantable blood pump or transcutaneous energy transfer system (TETS) power in communication with the internal battery and the implantable blood pump. Following the ten attempts, the control circuit is further configured to pause attempting to restart the implantable blood pump and begin attempting to recharge the internal battery with TETS power. If internal battery power sufficient to attempt to restart the pump becomes available following the ten attempts, the processing circuitry is further configured to attempt to restart the stopped implantable blood pump. If a new power source becomes available following the ten attempts, the processing circuitry is further configured to restart the stopped implantable blood pump with the new power source. If within thirty minutes from a last of the ten attempts, internal battery power sufficient to attempt a start of the implantable blood pump become available, the processing circuitry is further configured to attempt to restart the implantable blood pump at least two more times with internal battery power.
The details of one or more aspects of the disclosure are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the techniques described in this disclosure will be apparent from the description and drawings, and from the claims.
A more complete understanding of the present invention, and the attendant advantages and features thereof, will be more readily understood by reference to the following detailed description when considered in conjunction with the accompanying drawings wherein:
It should be understood that various aspects disclosed herein may be combined in different combinations than the combinations specifically presented in the description and accompanying drawings. It should also be understood that, depending on the example, certain acts or events of any of the processes or methods described herein may be performed in a different sequence, may be added, merged, or left out altogether (e.g., all described acts or events may not be necessary to carry out the techniques). In addition, while certain aspects of this disclosure are described as being performed by a single module or unit for purposes of clarity, it should be understood that the techniques of this disclosure may be performed by a combination of units or modules associated with, for example, a medical device.
In one or more examples, the described techniques may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored as one or more instructions or code on a computer-readable medium and executed by a hardware-based processing unit. Computer-readable media may include non-transitory computer-readable media, which corresponds to a tangible medium such as data storage media (e.g., RAM, ROM, EEPROM, flash memory, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer).
Instructions may be executed by one or more processors, such as one or more digital signal processors (DSPs), general purpose microprocessors, application specific integrated circuits (ASICs), field programmable logic arrays (FPGAs), or other equivalent integrated or discrete logic circuitry. Accordingly, the term “processor” as used herein may refer to any of the foregoing structure or any other physical structure suitable for implementation of the described techniques. Also, the techniques could be fully implemented in one or more circuits or logic elements.
Referring now to the drawings in which like reference designators refer to like elements there is shown in
Continuing to refer to
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It will be appreciated by persons skilled in the art that the present invention is not limited to what has been particularly shown and described herein above. In addition, unless mention was made above to the contrary, it should be noted that all of the accompanying drawings are not to scale. A variety of modifications and variations are possible in light of the above teachings without departing from the scope and spirit of the invention, which is limited only by the following claims.
