pertaining to the xiphoid process and the ribs.
a 75-mm short-beveled, 16-gauge needle is attached via a 3-way stopcock to a 30- or 50-ml syringe. the pericardium may be entered via the right or left xiphocostal angle or from the tip of the xiphoid process with the needle directed inward, upward, and close to the chest wall. the needle is advanced with constant suction applied to the syringe. merckmanuals.com