公开(公告)号：US09539435B2

公开(公告)日：2017-01-10

申请号：US14695887

申请日：2015-04-24

Applicant: Medtronic, Inc.

Inventor： Marshall J Rasmussen ,  Randolph E Crutchfield ,  Mark R Boone ,  Lonny V Cabelka ,  Kevin P Kuehn ,  Forrest C. M. Pape

IPC: A61N1/00 ,  A61N1/39

CPC classification number: A61N1/3975 ,  A61N1/3925 ,  A61N1/3956

Abstract: An implantable medical device includes a low-power circuit, a high-power circuit, and a multi-cell power source. The implantable medical device delivers stimulation therapy to cardiac tissue. The cardioversion energy is delivered across through electrodes that are coupled to terminals of the high-power circuit. A protection circuit for protecting the low-voltage circuit components from high voltage pulses includes a first segment coupled to a first of the electrodes and a second segment coupled to a second of the electrodes, the components of the low-voltage circuit being coupled to the transthoracic protection circuit portion, and a reference potential corresponding to a ground potential, wherein the first and second segments of the transthoracic protection circuit portion are coupled to the reference potential in a parallel configuration.

Abstract translation: 可植入医疗装置包括低功率电路，高功率电路和多电池电源。 可植入医疗装置将刺激疗法递送至心脏组织。 心电复律能量通过耦合到大功率电路端子的电极传送。 用于保护低电压电路部件免受高电压脉冲的保护电路包括耦合到第一电极的第一段和耦合到第二电极的第二段，低压电路的组件耦合到 经胸廓保护电路部分和对应于地电位的参考电位，其中经胸廓保护电路部分的第一和第二段以并联配置耦合到参考电位。

公开(公告)号：US09526910B2

公开(公告)日：2016-12-27

申请号：US14536881

申请日：2014-11-10

Applicant: Medtronic, Inc.

Inventor： Randolph E Crutchfield ,  Lonny V Cabelka ,  Mark R Boone ,  Marshall J Rasmussen

IPC: A61N1/39 ,  A61N1/37

CPC classification number: A61N1/3981 ,  A61N1/371 ,  A61N1/3906 ,  A61N1/3956 ,  A61N1/3987

Abstract: Recent advancements in power electronics technology have provided opportunities for enhancements to circuits of implantable medical devices. The enhancements have contributed to increasing circuit miniaturization and an increased efficiency in the operation of the implantable medical devices. The therapy delivery circuits and techniques of the disclosure facilitate generation of a therapy stimulation waveform that may be shaped based on the patient's physiological response to the stimulation waveform. The generated therapy stimulation waveforms include a stepped leading-edge that may be shaped having a varying slope and varying amplitudes associated with each of the segments of the slope. Unlike the truncated exponential waveform delivered by the conventional therapy delivery circuit which is based on the behavior of the output capacitors (i.e., i=C(dV/dt)), the stimulation waveform of the present disclosure may be dynamically shaped as a function of an individual patient's response. The dynamically shaped therapy stimulation waveforms facilitate achieving lower capture thresholds which reduces the device's supply consumption thereby increasing longevity of the device and facilitate a reduction of tissue damage.

公开(公告)号：US20160067511A1

公开(公告)日：2016-03-10

申请号：US14695887

申请日：2015-04-24

Applicant: Medtronic, Inc.

Inventor： Marshall J Rasmussen ,  Randolph E Crutchfield ,  Mark R Boone ,  Lonny V Cabelka ,  Kevin P Kuehn ,  Forrest C. M. Pape

IPC: A61N1/39

CPC classification number: A61N1/3975 ,  A61N1/3925 ,  A61N1/3956

Abstract: An implantable medical device includes a low-power circuit, a high-power circuit, and a multi-cell power source. The implantable medical device delivers stimulation therapy to cardiac tissue. The cardioversion energy is delivered across through electrodes that are coupled to terminals of the high-power circuit. A protection circuit for protecting the low-voltage circuit components from high voltage pulses includes a first segment coupled to a first of the electrodes and a second segment coupled to a second of the electrodes, the components of the low-voltage circuit being coupled to the transthoracic protection circuit portion, and a reference potential corresponding to a ground potential, wherein the first and second segments of the transthoracic protection circuit portion are coupled to the reference potential in a parallel configuration.

Abstract translation: 可植入医疗装置包括低功率电路，高功率电路和多电池电源。 可植入医疗装置将刺激疗法递送至心脏组织。 心电复律能量通过耦合到大功率电路端子的电极传送。 用于保护低电压电路部件免受高电压脉冲的保护电路包括耦合到第一电极的第一段和耦合到第二电极的第二段，低压电路的组件耦合到 经胸廓保护电路部分和对应于地电位的参考电位，其中经胸廓保护电路部分的第一和第二段以并联配置耦合到参考电位。