Patent ID: 7430447
Filing Date: 2008-09-30
Classification: A61B,A61N

Abstract:
1. A method comprising: acquiring impedance values over one or more respiratory cycles; determining an impedance span based on the impedance values; acquiring IEGMs over one or more respiratory cycles; determining evoked response measure values based on the IEGMs; determining an evoked response span based on the evoked response measure values; based on the impedance span and the evoked response span, determining one or more indexes; determining a respiratory condition based on the one or more indexes; wherein the respiratory condition is apnea and wherein apnea is characterized by a small impedance span; or the respiratory condition is Cheyne-Stokes Respiration (CSR) and wherein CSR is characterized by a progressively diminishing impedance span; and adjusting patient therapy if the one or more indexes indicates need for respiratory improvement.