Costodiaphragmatic recess-the costodiaphragmatic recess is the lowest extent of the pleural cavity or sac. it is the part of the pleural sac where the costal pleura changes into the diaphragmatic pleura. it is also the area into which a needle is inserted for thoracocentesis, and it is found at different levels at different areas of the thorax. at the mid clavicular line, the costodiaphragmatic recess is between ribs 6 and 8; at the midaxillary line it is between 8 and 10; and at the paravertebral line it is between 10 and 12. so, inserting the needle just above the 9th rib at the midaxillary line should put you in the costodiaphragmatic recess.
the cardiac notch is a structure on the left lung which separates the lingula below from the upper portion of the superior lobe of left lung.
the costomediastinal recess is found where the costal pleura becomes the mediastinal pleura.
the cupola is the part of the pleural cavity which extends above the level of the 1st rib into the root of the neck.
the oblique pericardial sinus is an area of the pericardial cavity located behind the left atrium of the heart.