MEDICAL DRAINAGE DEVICE WITH FLOW RESTRICTION FEATURE

摘要

The present invention provides for a dual port arrangementfor a water seal chamber of a drainage device for channeling, andrestricting fluid flow through the water seal during normaloperation of the device when the patient is breathing normally,while preventing the breach of the water seal during reverse flowconditions when the patient takes a sudden, and deep inhalation.The dual port arrangement comprises a narrow side port and anelongated tunnel port interposed between, and in communicationwith, both arms of the water seal chamber. The side port has athin slot configuration that restricts fluid flow communicationthrough the side port, and the back tunnel port defines a lowprofile, elongated conduit with openings that channel fluid flowbetween both arms of the water seal chamber. The elongatedconfiguration of the conduit also prevents a steep water gradientfrom falling below the upper portion of the conduit openingduring reverse flow conditions, and breach the water seal.