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.
Quick GuideDeep Vein Thrombosis (DVT): Symptoms, Treatment & Prevention. 1  A blood clot forms to try and repair damage to a blood vessel, either an artery or vein.  A blood clot is a gel-like mass formed by platelets and fibrin in the blood to stop bleeding.