ANATOMY Â© 2004 The Medicine Publishing Company Ltd1ANAESTHESIA AND INTENSIVE CARE MEDICINE The sacrum is a large triangular bone formed from the five fused sacral vertebrae (Figure 1). Two rows of foramina on its dorsal and pelvic surfaces divide it into a median portion, the body and two lateral masses.
Edema or Ådema is an abnormal accumulation of fluid in the interstitium, located beneath the skin and in the cavities of the body, which can cause severe pain. Clinically, edema manifests as swelling. The amount of interstitial fluid is determined by the balance of fluid homeostasis; and the increased secretion of fluid into the interstitium, or the impaired removal of the fluid, can cause the condition. The word is from Greek Î¿á¼´Î´Î·Î¼Î± oÃ­dÄma meaning swelling.
Our Edema Main Article provides a comprehensive look at the who, what, when and how of Edema Pitting edema: Observable swelling of body tissues due to fluid accumulation that may be demonstrated by applying pressure to the swollen area (such as by depressing the skin with a finger). If the pressing causes an indentation that persists for some time after the release of the pressure, the edema is referred to as pitting edema. Any form of pressure, such as from the elastic in socks, can induce pitting with this type of edema.