title: Robotic replacement of the descending thoracic aorta: an alternative to endovascular therapy?
abstract: BACKGROUND
  : Replacement of the descending thoracic aorta is traditionally performed via a left thoracotomy. Endovascular treatment of descending thoracic aortic aneurysms has recently evolved as an alternative treatment for selected patients, yet no long-term results are available. The authors replaced the descending thoracic aorta in a group of pigs with an interposition Dacron graft using a closed-chest, totally robotic technique.
  
  
  METHODS
  : Ten pigs, weighing 25 to 45 kg, underwent surgery using the DaVinci robotic surgical system. Under single-lung ventilation and CO2 insufflation, the descending thoracic aorta was completely mobilized. Proximal and distal cross-clamps were applied through separate accessory stab wounds. The mid-descending thoracic aorta was excised. An interposition Dacron graft was robotically sewn in an end-to-end fashion to the descending thoracic aorta using interrupted nitinol clips.
  
  
  RESULTS
  : All animals survived the procedure. Mean aortic clamp time was 55 ± 14 minutes. All anastomoses were completed without difficulty with a mean total anastomotic time of 42 ± 11 minutes. The anastomoses were challenged for bleeding by administrating α1-adrenergic receptor agonists to a systolic blood pressure of 200 mm Hg with no evidence of leak.
  
  
  CONCLUSIONS
  : Robotic replacement of the thoracic aorta is feasible and reproducible. This procedure provides the standard Dacron graft repair with its known long-term results. The added value of robotic technology to the therapeutic armamentarium in the treatment of thoracic aortic aneurysms may be worth the effort required for procedural development. Furthermore, it may serve as a valid alternative to endovascular treatment of thoracic aortic aneurysms.
authors.affiliation: From the Department of Cardiothoracic and Vascular Surgery, The University of Texas Medical School at Houston, The Memorial Hermann Institute for Cardiovascular Research and Robotics Technology Houston, TX.
authors.forename: Eyal E
authors.initials: EE
authors.lastname: Porat
authors.forename: Peter D
authors.initials: PD
authors.lastname: Herrera
authors.forename: Roy
authors.initials: R
authors.lastname: Sheinbaum
authors.forename: Anthony L
authors.initials: AL
authors.lastname: Estrera
authors.forename: Tam T T
authors.initials: TT
authors.lastname: Huynh
authors.forename: Ali
authors.initials: A
authors.lastname: Azizzadeh
authors.forename: Riad
authors.initials: R
authors.lastname: Meada
authors.forename: Charles C
authors.initials: CC
authors.lastname: Miller
authors.forename: Hazim J
authors.initials: HJ
authors.lastname: Safi