Title:
心不全及びチェーン・ストークス型呼吸の治療のための換気補助
Document Type and Number:
Japanese Patent JP3737698
Kind Code:
B2
Abstract:
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.
Inventors:
Michael Burson-Jones
Application Number:
JP2000550547A
Publication Date:
January 18, 2006
Filing Date:
May 21, 1999
Export Citation:
Assignee:
RESMED LIMITED
International Classes:
A61B5/08; A61M16/00; A61B5/087
Domestic Patent References:
| JP6503484A |
Attorney, Agent or Firm:
Aoyama Aoi
Yasushi Ohata
Tadataka Omori
Yasushi Ohata
Tadataka Omori