Establishment of a novel spinal cooling method via a pleural cavity for spinal cord protection during thoracoabdominal aneurysm repair.

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(1) By the simulation system we have established, we found that it was possible to cool a spinal cord to the target temperature (systemic temperature - 5℃) within 15 to 20 minutes in the constant heat flux condition.(2) We have developed the cooling device with peltier element.(3) With porcine experimental model, we could cool spinal cord to - 2.7℃ compared with systemic temperature within 15minutes in condition with aortic clamping and thermal insulation of a back.