| abstract |
Apparatus and methods to test respiratory patients for altered dyspnea awareness. The device imposes a defined inspiratory resistive load under controlled breathing conditions and records the patient's subjective sensation of dyspnea over time by incrementally increasing the inspiratory resistive load. In a preferred embodiment, the patient breathes in a controlled manner with visual biofeedback prompting, having predetermined respiratory rate, inspiration to expiration time ratio and inspiration and expiration respiratory waveforms. |