title: [Application of evoked potentials monitoring in total thoracoabdominal aorta aneurysm repair].
abstract: OBJECTIVE
  To evaluate the application value of evoked potentials (EP) monitoring in patients undergoing aorta-iliac bypass for total thoracoabdominal aorta aneurysm repair (tTAAAR).
  
  
  METHODS
  A prospective study, with a total of 31 patients undergoing tTAAAR and intraoperative EP monitoring from June 2014 to April 2015 was carried out. The results of intraoperative evoked potentials, clinical outcomes and follow-up data of patients were collected for further evaluation.
  
  
  RESULTS
  The EP wave disappeared [motor evoked potentials for (55.6±18.1) min, somatosensory evoked potentials for (50.3±18.7) min] after proximal descending aorta being clamped, and gradually recovered after the segment arteries of spine cord were reconstructed. The EP wave was restored to normal level at the end of operation in all the cases. The somatosensory evoked potentials remained unchanged in 2 cases (false negative). One case died after operation. No spinal cord injury occurred. The median follow-up after operation was 10 months (5-14 months). There was no delayed neurological deficit.
  
  
  CONCLUSIONS
  EP provided an on-line monitoring of the condition of spinal cord function, which become an intraoperative protocol to avoid the irreversible injury of spinal cord.
authors.affiliation: Department of Cardiovascular Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing Aortic Disease Center, Beijing 100029, China.
authors.forename: Y Y
authors.initials: YY
authors.lastname: Duan
authors.forename: J
authors.initials: J
authors.lastname: Zheng
authors.forename: X D
authors.initials: XD
authors.lastname: Pan
authors.forename: J M
authors.initials: JM
authors.lastname: Zhu
authors.forename: Y M
authors.initials: YM
authors.lastname: Liu
authors.forename: Y P
authors.initials: YP
authors.lastname: Ge
authors.forename: L J
authors.initials: LJ
authors.lastname: Cheng
authors.forename: L Z
authors.initials: LZ
authors.lastname: Sun
mesh_terms: D017545:Aortic Aneurysm, Thoracic / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery*; D019054:Evoked Potentials, Motor; D005073:Evoked Potentials, Somatosensory; D006801:Humans; D016343:Monitoring, Intraoperative; D011446:Prospective Studies; D019651:Plastic Surgery Procedures; D014656:Vascular Surgical Procedures / Q000379:methods*