Abstract: The unilateral biportal endoscopic spinal surgery(UBE) technique is an emerging endoscopic technique,mainly used as treatment for lumbar degenerative disease.The procedure is characterized by two working channels,one being endoscopic,the second to be employed as an operating channel.Through the use of such dual-channel-technology,it allows the operating instruments to be unrestricted in size.Therefore,it is a highly efficient surgical technique for minimally invasive spinal surgery(MISS).However,the clinical complications of UBE technology must be taken into consideration.Possible side effects include dural injury,epidural hematoma,occult blood loss,postoperative headache,nerve root injury and insufficient decompression.This article reviews the causes,prevention and management of UBE-related complications.            

Key words: spinal endoscopy, unilateral and double channels, complications