To be absolutely critical to the actual interpretation.ĭescriptive elements for assessing the ventilatory response to Theĭescriptive part may appear to be tedious but I’ve always found it Structured approach to interpreting CPET results that includes aĭescriptive part as well as the interpretation and summary. In gas flow that occurs at any of these steps will leave aĭistinctive pattern in the test results. Interpret CPETs and that always boils down to the flow of oxygen and Involved and easier because determining test adequacy and the primaryĬause(s) of an exercise limitation tends to be clearer.įound that you have to go back to basic physiology whenever you More difficult because there are a lot more parameters Test is both more difficult and easier than interpreting regular Interesting (and enjoyable) things I’ve done. We conclude that pressure-controlled ventilation may be useful to improve gas exchange and alveolar recruitment during one lung ventilation.Always found interpreting CPET tests to be one of the more After one-lung ventilation patients with pressure controlled ventilation had lower alveolar-arterial oxygen tension difference and a higher arterial oxygen partial pressure with significant differences for those patients in the intensive care unit. We observed, that peak airway pressure, dead space ventilation and arterial carbon dioxide partial pressure were significantly higher during volume-controlled ventilation. Parameters of ventilation, pulmonary function and systemic and pulmonary hemodynamics were recorded. In the other group, volume-controlled ventilation was continued. In one group, ventilation was switched to pressure-controlled ventilation after starting one-lung ventilation. After two-lung ventilation with volume-controlled ventilation, patients were divided randomly into two groups. We studied 50 patients undergoing thoracotomy and one-lung ventilation because of cardiovascular disease. Previous clinical studies compared pressure-controlled versus volume-controlled ventilation during one-lung ventilation in patients with pre-existing pulmonary disease. One-lung ventilation is limited by hypoventilation and hypoxemia because of increasing airway pressure and intrapulmonary shunt.
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