The OTSC have several advantages over existing treatments. First, tissue compression on the bleeding artery is critical in control of bleeding. OTSC captures tissue size to that of an endoscope at least 9 mm in diameter. In theory, OTSC can compress arteries of significant size, beyond what can be achieved with standard treatment. Second, clip retention rate with OTSC is extremely and recurrent bleeding from clip loss or dislodgement can be avoided. Third, local complication from their applications is negligible. As a comparison, contact thermal coagulation carries a small risk (around 1%) of perforation.