Vitalograph one-way valve mouthpieces for use with peak flow meters and spirometers. The low cost, low resistance SafeTway mouthpiece allows entry of expired air into the measuring system, but not back to the test subject. The Mini SafeTway with a 22mm diameter mouthpiece is for paediatric use or for elderly test subjects who have difficulty fitting their mouth properly around the standard mouthpiece size.

Features:

• Completely disposable
• Simple, yet effective one-way valve prevents accidental inhalation of pathogens
• Inexpensive alternative to the bacterial viral filter for expiratory only testing
• Fits most pulmonary function test equipment, including peak flow meters