| 摘要 |
A chest drainage apparatus comprises a bottle housing a fluid collection chamber (26) having a fluid inlet connectable to receive fluid and air from a chest cavity to be drained, an air chamber (20) having an inlet from an air space above the fluid level in the collection chamber and an outlet for connection to a negative pressure source, a U-tube in the fluid inlet to the fluid collection chamber to provide a visual indication of any airflow into the system; the air chamber having a check valve (14) effective to prevent the backflow of air through said airspace and a negative pressure relief valve (60) connected to the air chamber to limit the negative pressure, if any, in the air space above the fluid to a predetermined maximum. A rate of flow indicator (24) and a positive pressure check valve (16) are connected to the air chamber. The air chamber and said valves and flow indicator form a unit which is detachable from the fluid collection chamber. <IMAGE> |
