### Abstract

The authors investigated the relationship between airway resistance and flow-resistive work in 136 subjects with different types of P/ {Mathematical expression} diagram. With the same resistance values they found a significantly large standard deviation of the respiratory work values. This finding is only partly due to the fact that the magnitude of the flow-resistive work is also related to the velocity of flow. Instead of the unreliable assessment of the P/ {Mathematical expression} diagram they recommend calculation of the equivalent resistance to evaluate the severity of the bronchial obstruction. The equivalent resistance was compared with the airway resistance in 26 cases and marked differences were observed particularly in the case of the inspiratory and expiratory resistance values.

Original language | English |
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Pages (from-to) | 311-318 |

Number of pages | 8 |

Journal | Pneumonologie Pneumonology |

Volume | 150 |

Issue number | 2-4 |

DOIs | |

Publication status | Published - Aug 1 1974 |

### Keywords

- Equivalent Resistance
- Flow-Resistive Work
- Mean Flow Velocity
- P/ {Mathematical expression}, P/V and {Mathematical expression}/V Diagrams

### ASJC Scopus subject areas

- Physiology
- Pulmonary and Respiratory Medicine

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## Cite this

*Pneumonologie Pneumonology*,

*150*(2-4), 311-318. https://doi.org/10.1007/BF02179335