A medical or engineering system that drains fluid automatically without manual operation, such as a self-draining wound tube or gravity-fed drainage system.
Combines auto- (self, automatic) + drainage (removal of liquid). A modern medical term from the mid-20th century describing innovations in surgical and post-operative care.
Modern surgical drain tubes are designed with autodrainage in mind—they use gravity, body pressure, and clever valve systems to continuously remove fluids without needing nurses to manually extract them, significantly improving post-operative recovery.
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