| 摘要 |
A respiration monitor and x-ray trigger apparatus, wherein analog respiration signals (198) are amplified and divided (200) into respiratory and heartbeat components. The analog respiratory components are processed (300), digitized and further processed to yield indications of respiratory extrema (400) and respiration rate (600). The analog heartbeat components are processed (800) to give indications of heartbeat rate (900). A trigger signal is selectively generated (700) to the x-ray machine just prior to occurrence of a selected respiration extrema. The value of the respiration signal at a sample occurring just after detection of the selected extrema is stored, and modified. Apnea alarms are generated (1000) if a predetermined decrease in respiration rate is detected in successive periods in conjunction with a predetermined number of decelerating heart beats. An alarm is also generated (1100) if the that respiration and heart rates are equal for a predetermined number of periods of if the respiration or heart rates stray outside of preset threshold values. |
