| 摘要 |
Medical device, e.g. pacemaker, defibrillator, etc., can measure respiratory activity and produces a signal (26) representing the periodicity and amplitude of a patient's successive respiratory cycles, namely a minute respiratory volume signal. The medical device includes a discriminator which, by signal analysis, can discriminate between different types of respiratory profiles, and can diagnose a Cheyne-Stokes-type respiratory profile. The discriminator detects alternation of hyperventilation respiratory cycles (20) separated by respiratory pauses (22) or periods of hyperventilation or normal breathing (24), and discriminates between periods of respiratory pause and periods of hyperventilation or normal breathing by analysis of second order variations of the signal. The discriminator analyses second order variations of the signal by retrieving the peaks (32) of this signal (26) and evaluating the interval (36) between successive peaks.
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