| 摘要 |
A method and apparatus is disclosed for determining work of breathing by using a dynamic flow measuring means, such as venturi tube to obtain an electrical signal proportional to flow squared of air or other gas breathed. This signal is scaled in proportion to a previously obtained value of respiratory resistance and then integrated over one or more respiratory cycles to obtain a signal proportional to the work of breathing. The integrating means time constant is adjusted in accordance with the separately determined air or gas density.
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