Passage of a hollow needle or trocar and cannula into the brain to drain or aspirate an abscess or the fluid of a hydrocephalus. ... Origin: cephalo-+ G. Kentesis, puncture ... (05 Mar 2000) ... 
(sef″ә-lo-sen-te´sis) surgical puncture of the head.
Type: Term Pronunciation: sef′ă-lō-sen-tē′sis Definitions: 1. Passage of a hollow needle or trocar and cannula into the brain to drain or aspirate an abscess or the fluid of a hydrocephalus.