Continuous sealing tuohy-borst adapter

A Tuohy-Borst adapter, comprising:

• a main valve body comprising an inner luminal wall extending from a distal opening to a proximal opening, and defining a lumen;
• a dynamic radial seal mountingly received by a seat of the main valve body, the dynamic radial seal having:
• a base flange;
• and
• a plurality of pliable occlusive elements radiating inward from the base flange, and arranged in a regular pattern relative to each other, wherein each of the pliable occlusive elements contacts a plurality of other occlusive elements;
• a sidearm in fluid communication with the lumen and equipped with a three-way stopcock configured to switch fluid communication between the lumen and one of two alternate fluid paths, wherein a confluence joins the sidearm and lumen in fluid communication;
• and
• a pressure transducer protruding through an opening into a lumen of the sidearm, the pressure transducer being isolatable from fluid communication with the lumen by switching the three-way stopcock.