Hemodynamic effects of high frequency ventilation superimposed on intermittent positive pressure ventilation in dogs
| Autor: | Jens Bo Andersen, H. Gravesen, Torben Ægidius Mogensen, H. Rygård, K. Eliasen, L. Nielsen |
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| Rok vydání: | 1987 |
| Předmět: |
Artificial ventilation
Cardiac output Pulmonary Circulation medicine.medical_treatment High-Frequency Ventilation Blood Pressure Intermittent Positive-Pressure Ventilation Positive-Pressure Respiration Dogs medicine Animals Lung business.industry Pulmonary Gas Exchange High-frequency ventilation Central venous pressure Hemodynamics General Medicine Lung Injury Anesthesiology and Pain Medicine Blood pressure medicine.anatomical_structure Anesthesia Vascular resistance Arterial blood Vascular Resistance business Respiratory minute volume |
| Zdroj: | Acta anaesthesiologica Scandinavica. 31(7) |
| ISSN: | 0001-5172 |
| Popis: | The hemodynamic effects of high frequency ventilation (HFV) superimposed on intermittent positive pressure ventilation (IPPV) in seven dogs before and after thrombin infusion were investigated. HFV was superimposed on a Servo 900 B ventilator by a Siemens Elema HFV prototype unit. Mean arterial blood pressure, heart rate, central venous pressure, pulmonary artery pressure, cardiac output, right and left ventricular pressures, pleural pressure, arterial blood gases, and right and left ventricular ejection fractions were recorded. Measurements were done during IPPV alone and during HFV superimposed on IPPV. The HFV frequencies were 5, 15, and 20 Hz at a constant minute volume of 5 1. When HFV was started, the IPPV minute volume was reduced to one third of the initial volume. No significant changes in the measured parameters were observed during the different ventilatory modes either before or after thrombin infusion which doubled the pulmonary vascular resistance. It is concluded that high frequency ventilation superimposed on IPPV might be a ventilatory mode that offers cardiovascular stability and reduces the risk of barotrauma. |
| Databáze: | OpenAIRE |
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