1. For inspiratory load compensation testing, this threshold positive expiratory pressure (PEP) training device was inverted and connected to a respiratory sensor (black arrow).
For inspiratory load compensation testing, this threshold positive expiratory pressure (PEP) training device was inverted and connected to a respiratory sensor (black arrow). The subject was briefly disconnected from the ventilator, and the sensor was connected directly to the tracheostomy tube. The valve of the training device remained closed until sufficient inspiratory pressure was generated to overcome the 10 cm H2O load. Once the threshold pressure was reached, the valve opened, permitting inspiratory air flow (white arrow). Expiration was unimpeded by the training device.
Barbara Kellerman Smith et al. Respir Care 2014;59:22-31
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