Thoracentesis

Thoracentesis /ˌθɔːrəsᵻnˈtiːsᵻs/, (from Greek, thorax + centesis, puncture) also known as thoracocentesis or pleural tap, is an invasive procedure to remove fluid or air from the pleural space for diagnostic or therapeutic purposes. A cannula, or hollow needle, is carefully introduced into the thorax, generally after administration of local anesthesia. The procedure was first described in 1852.