Threshold PEP is used for airway clearance, bronchial hygiene, or as an alternative to chest physical therapy. 
Threshold PEP incorporates a flow-independent one-way valve to ensure consistent resistance with adjustable specific pressure settings
(in cm H20) which are set by the healthcare professional.  When patients breathe out through Threshold PEP, the resistive load creates positive pressure that helps open the airways and allows mucus to be expelled during “huff” coughing (forced expiratory technique).

• Flow-independent one-way valve
• Constant pressure (regardless of patient’s airflow) eliminates the need for a pressure indicator
• Easy to set, truly adjustable pressure (in 1 cm H2O increments)
• Effective therapy when held in any position
• Can be used with mouthpiece or mask
• Easy to clean
• Made of durable, high-impact acrylic
• Improves mobilization and prevents accumulation of secretions
• Promotes effective breathing patterns and improves gas exchange
• Improves central and peripheral airway function
• Prevents or reverses atelectasis
• Optimizes bronchodilation when combined with respiratory drug delivery via nebulizer or MDI spacer devices