Answer :
Final answer:
The amount of suction in a closed drainage system is determined by the water level, primarily set at 20 cm H2O. The pressure gradient created by the water level is the key determinant of suction. Other factors such as type of drainage system and patient's condition could influence how the water level is managed.
Explanation:
The amount of suction in a closed drainage system is typically determined by the water level, which is commonly set at 20 cm H2O. This is due to the fact that suction is essentially determined by the pressure gradient - increasing the water level results in a higher pressure, hence more suction. While factors such as the type of drainage system used and the patient's condition could affect how the water level is set, the fundamental determinant of suction is the pressure differential created by the water level.
This principle is widely applied in medicine – especially in surgical fields where drainage systems are commonly used to help with wound management, fluid drain in body cavities, or in pulmonary therapy. It is crucial to correctly understand and execute this in a clinical setting for the comfort and safety of the patient.
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