Respiratory drive and timing during assisted ventilation in dogs
| Autor: | Daniel H. Simmons, Catherine S. H. Sassoon, Alan C. Jasper |
|---|---|
| Rok vydání: | 1986 |
| Předmět: |
Pulmonary and Respiratory Medicine
Artificial ventilation Time Factors medicine.medical_treatment Diaphragm Diaphragmatic breathing Differential Threshold Vagotomy Positive-Pressure Respiration Dogs Carnivora Pressure Tidal Volume Medicine Animals Hyperoxia biology business.industry Electromyography Respiration Fissipedia Carbon Dioxide Hydrogen-Ion Concentration biology.organism_classification Diaphragm (structural system) Oxygen Blood Control of respiration Anesthesia medicine.symptom business Inspiratory Capacity |
| Zdroj: | Respiration; international review of thoracic diseases. 49(2) |
| ISSN: | 0025-7931 |
| Popis: | In 8 anesthetized dogs, during isocapnic hyperoxia we studied the effect of assisted ventilation (AV) on ventilatory drive, inspiratory off-switch volume (Voff) and duration of inspiratory diaphragmatic activity (Tdi). Tidal volumes (Vt) during AV were double spontaneous Vt. Two electrodes were inserted in the diaphragm to obtain the electromyogram (EMG). The index of ventilatory drive was the EMG 0.3--i.e., the amplitude of the moving average EMG 300 ms after the onset of inspiratory activity. AV decreased EMG 0.3 but had no effect on Voff and Tdi. Vagotomy not only abolished the reduction in drive, but may have increased drive during AV. |
| Databáze: | OpenAIRE |
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