Draw a 3 chamber chest drainage system and include a brief description of the function of each chamber
College Answer
A drawing & description which identifies the following was required:-
A) A collection chamber which is connected to the intercostal drain and collects pleural fluid. This chamber can be independently emptied and in addition allow for an accurate record of pleural drainage amount.
B) A water seal chamber which ensures that the water seal is maintained at a predetermined level whilst still allowing for drainage of pleural fluid.
C) A suction control chamber which ensures that an accurate , easily verifiable and consistent level of suction is being delivered to the pleural cavity as long as wall suction is greater than the required suction pressure.
Discussion
This question closely resembes Question 24.2 from the second paper of 2012.
In any case, here is a diagram:
References
NSW Health: Chest Drain - Set up of Atrium Oasis Dry Suction Under-Water Seal Drainage
Atrium have published their instructions online.
Additionally, they provide this training document which is surprisingly full of useful information.