(Greek: perforation, puncture, or tapping, as with an aspirator or needle)
2. A puncture of the wall of a fluid-filled cavity with a hollow needle to draw off the contents for medical diagnosis: A trocar is used during an abdominal paracentesis to obtain some ascitic fluid for examination from a patient while he or she is in a sitting position.
Due to a sports injury, Bruce had what was called "water-on-the-knee"; so, the doctor used arthrocentesis to draw off the liquid and relieve his discomfort.
Paracentesis is most often performed to remove fluid for analysis to aid daanosis of medical conditions causing ascites, a reference to fluid which collects in the abdominal cavity.
Ascites can occur as a result of a number of conditions, including severe liver disease and the presence of malignant cells within the abdomen.
The paracentesis process may also be performed to relieve pressure due to excess fluid or to instill drugs.
Abdominal or thoracic paracentesis is most common; however, other sites include the pericardium and the scrotum
The procedure is usually carried out using local anesthesia and it is said to be quick and relatively painless.