Respiratory changes during a menopausal hot flush

The effect of a menopausal hot flush on respiratory parameters was studied in one subject on nine separate occasions. The flushes were associated with a significant increase in the production of carbon dioxide and lesser but still significant changes in oxygen consumption, tidal volume and minute volume. The changes in respiratory frequency and respiratory quotient were not significant. Significant changes in carbon dioxide production and oxygen consumption were still evident well into the climacteric.