| 摘要 |
A pressure indicator for a chest drainage unit is provided. The indicator includes an outer casing having a longitudinal axis and a first end with an opening exposed to ambient air and a second end with an opening coupled to communicate with the collection chamber inside a chest drainage unit for reading patient pressure. A linear force resistance element in the form of a spring compressed inside a bellows is disposed inside the outer casing and aligned along the longitudinal axis. An indicator cap is disposed inside the outer casing and coupled to a tip portion of the bellows element. The interior of the bellows communicates with the collection chamber pressure such that the spring and bellows expands and contracts inside the casing to indicate the degree of suction pressure in the collection chamber. |
