Cough Assist Face Mask Overview The Philips Respironics CoughAssist T70 machine is a non-invasive treatment to help patients clear secretions from the lungs. The machine does this by providing air pressure through a tube and mask interface and stimulating a cough from the patient. These latex-free Philips Respironics face masks are made for use with CoughAssist units and are available in various adult and pediatric sizes.