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Hint : ๐ŸŒŠ Water seal must be 2 cm

Correct Answers:

  • 1 cm of water present in the water seal chamber


Rationale :

๐Ÿ”ต The water seal chamber of a chest drainage system must contain exactly 2 cm of sterile water to create a proper one-way valve that prevents air from re-entering the pleural space.

๐Ÿ”ต Only 1 cm of water indicates inadequate sealing, which could allow air to flow back into the chest cavity, leading to pneumothorax recurrence or compromised lung expansion.

๐Ÿ”ต Nurses must routinely assess and maintain the correct water level in the chamber; if it's low, sterile water should be added immediately under sterile technique.

๐Ÿ”ต All other findings are expected and normal:

โ€” Tidaling reflects pressure changes with breathing.

โ€” -20 cm Hโ‚‚O suction is standard for adult chest drainage.

โ€” A partially full drainage collection chamber is normal unless thereโ€™s sudden increase in volume or presence of bright red blood.


Distractor Analysis :

Rationale for Incorrect Options to be Available Soon

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