TPO Roof Replaces Leaking Inverted Roof-Membrane Assembly System. The problematic roof was an inverted roof-membrane assembly (IRMA), which consisted of a built-up membrane installed over a structural concrete slab and topped by insulation.
Deep vein thrombosis (DVT) is a medical condition that occurs when a blood clot forms in a deep vein. These clots usually develop in the lower leg, thigh, or pelvis, but they can also occur in the arm.
Patient Comments Share Your Story. 1  The definition of deep venous thrombosis (DVT) is a condition in which a blood clot is embedded in one of the major deep veins of the lower legs, thighs, pelvis, or arm. 2  A clot blocks blood circulation through these veins, which carry blood from the lower body back to the heart.