ASSISTIERTE BEATMUNG BEI DER BEHANDLUNG VON HERZVERSAGEN UND BEI CHEYNE-STOKES-ATMUNG,申请号DE1999637492T-传众专利搜索

ASSISTIERTE BEATMUNG BEI DER BEHANDLUNG VON HERZVERSAGEN UND BEI CHEYNE-STOKES-ATMUNG

申请公布号：DE69937492(T2)

申请号：DE1999637492T

申请日期：1999.05.21

申请公布日期：2008.08.21

申请人：

RESMED LTD.

发明人：BERTHON-JONES, MICHAEL

分类号：A61B5/08;A61M16/00;A61B5/087

主分类号：A61B5/08

摘要：Method and apparatus for the treatment of cardiac failure, Cheyne-Stokes breathing or central sleep apnea are disclosed. A subject is provided with ventilatory support, for example positive pressure ventilatory support using a blower and mask. Respiratory airflow is determined. From the respiratory airflow are derived a measure of instantaneous ventilation (for example half the absolute value of the respiratory airflow) and a measure of longterm average ventilation (for example the instantaneous ventilation low pass filtered with a 100 second time constant). A target ventilation is taken as 95% of the longterm average ventilation. The instantaneous ventilation is fed as the input signal to a clipped integral controller, with the target ventilation as the reference signal. The output of the controller determines the degree of ventilatory support. Clipping is typically to between half and double the degree of support that would do all the respiratory work. A third measure of ventilation, for example instantaneous ventilation low pass filtered with a time constant of 5 seconds, is calculated. Ventilatory support is in phase with the subject's respiratory airflow to the fuzzy extent that this ventilation is above target, and at a preset rate conversely.