The Clinical Decisions Unit of Holby City Hospital's emergency department, referred to simply as CDU, was a location within Holby City ED. Patients were sent there whilst medical staff decided on their course of treatment.

In February 2018, Ethan Hardy, the department's Clinical Lead, decided to open a Clinical Decisions Unit run by F1s to help free up space in the department. However, when the unit was soon deemed not to be cost-effective, Ethan decided to close it down.

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