30
Participants
Start Date
May 1, 2019
Primary Completion Date
February 1, 2022
Study Completion Date
May 1, 2022
inspiratory pressure threshold device
The threshold loading device is composed of a mouth -piece attached to a small plastic cylinder that contains a spring-loaded poppet value. The valve opens to permit inspiratory flow only once the person has generated adequate negative intrathoracic pressure to condense the spring.
Zhujiang Hospital,Southern Medical Universicity, Guangzhou
Zhujiang Hospital
OTHER