公开(公告)号：US20190111268A1

公开(公告)日：2019-04-18

申请号：US16161534

申请日：2018-10-16

Applicant: Medtronic, Inc.

Inventor： Melissa G.T. CHRISTIE ,  Ronald A. DRAKE ,  Vladimir P. NIKOLSKI ,  Bushan K. PURUSHOTHAMAN ,  Xusheng ZHANG

IPC: A61N1/365 ,  A61N1/38 ,  A61N1/39 ,  A61N1/37

Abstract: In some examples, a medical device system includes an electrode. The medical device system may include impedance measurement circuitry coupled to the electrode, the impedance measurement circuitry may be configured to generate an impedance signal indicating impedance proximate to the electrode. The medical device system may include processing circuitry that may be configured to identify a first component of the impedance signal. The first component of the impedance signal may be correlated to a cardiac event. The processing circuitry may be configured to determine that the cardiac event occurred based on the identification of the first component of the impedance signal.

公开(公告)号：US20180214202A1

公开(公告)日：2018-08-02

申请号：US15418325

申请日：2017-01-27

Applicant: Medtronic, Inc.

Inventor： Brian T. HOWARD ,  Mark T. STEWART ,  Damijan MIKLAVCIC ,  Bushan K. PURUSHOTHAMAN ,  Jeremy M. STIMACK

IPC: A61B18/14 ,  A61B5/042 ,  A61B34/20 ,  A61B5/00

Abstract: Methods, systems, and devices for enhancing the efficiency and efficacy of energy delivery and tissue mapping. One system includes a treatment element having a plurality of electrodes and an energy generator that is configured to deliver electric energy pulses to the electrodes in a variety of patterns. For example, electrodes may be arranged in closely spaced pairs. The energy generator may deliver mapping energy to each electrode in each pair individually to map tissue and may deliver ablation energy to the electrodes in each pair together, such that each pair is treated like a single electrode, to deliver ablation energy, such as bipolar ablation energy between adjacent pairs. One system includes at least one concave electrode, the configuration of which concentrates the energy and drives it deeper into the tissue. One system includes neutral electrodes between active electrodes, the energy generator selectively coupling the neutral electrodes to alter the ablation pattern.