发明名称 |
VENTILATORY ASSISTANCE FOR TREATMENT OF CARDIAC FAILURE AND CHEYNE-STOKES BREATHING |
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. 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. 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. 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. |
申请公布号 |
US2015013679(A1) |
申请公布日期 |
2015.01.15 |
申请号 |
US201414476953 |
申请日期 |
2014.09.04 |
申请人 |
ResMed Limited |
发明人 |
Berthon-Jones Michael |
分类号 |
A61M16/00 |
主分类号 |
A61M16/00 |
代理机构 |
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代理人 |
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主权项 |
1. A method for treatment of cardiac failure, Cheyne-Stokes breathing or central sleep apnea, comprising the steps of:
providing a subject with ventilatory support; deriving a measure of the subject's instantaneous ventilation; and adjusting the degree of ventilatory support to reduce changes in said measure of instantaneous ventilation over a timescale similar to that of the waxing-waning cycle of untreated Cheyne-Stokes breathing or central sleep apnea, while allowing changes in said measure of instantaneous ventilation over a timescale much longer than said waxing-waning cycle. |
地址 |
Bella Vista AU |