European Journal of Cardio-Thoracic Surgery, Vol 12, 120-126, Copyright © 1997 by European Association for Cardio-thoracic Surgery
Repair for aneurysms of the entire descending thoracic aorta or thoracoabdominal aorta using a deep hypothermia
Y Okita, S Takamoto, M Ando, T Morota, F Yamaki, R Matsukawa and Y Kawashima
Department of Cardiovascular Surgery, National Cardiovascular Center, Suita, Osaka, Japan. yokita@hsp.ncvc.go.jp
OBJECTIVE: Replacement of the entire descending aorta or of the
thoracoabdominal aorta still has a significant risk for postoperative
paraplegia. Surgical strategies using a deep hypothermia to protect the
spinal cord or viscera are discussed. METHODS: From April 1994, 25 patients
underwent graft replacement of the entire descending aorta (13 patients) or
thoracoabdominal aorta (12 patients) using a deep hypothermia. Five
patients had atherosclerotic aneurysms and 20 had aortic dissection. There
were 20 males and 5 females, whose age ranged from 26 to 72 years old, 47
years old in average. Surgery consisted with proximal anastomosis using
deep hypothermia (18 degrees C) with retrograde cerebral perfusion by
elevating central venous pressure to 20 mmHg, reconstruction of the
intercostal arteries, and distal open anastomosis, while perfusing the
brain and heart. Proximal open anastomosis was used with retrograde
cerebral perfusion technique in 18 patients. Averaged number of
reconstructed intercostal arteries was 2.1 for each patient. RESULTS: No
early mortality was found and one patient died of respiratory failure 6
months after surgery. One patient had a postoperative stroke and one had a
delayed onset of paraplegia 2 days after operation. The cause of paraplegia
was secondary hypoxemia and hypotension due to pneumonia. CONCLUSION:
Utilization of the deep hypothermia in surgery for aneurysms of the entire
descending aorta or of the thoracoabdominal aorta provided an adequate
protection of the spinal cord as well as the abdominal viscera, eliminated
clamp injury or cerebral embolization of debris or thrombi, and afforded
excellent surgical exposures.