胸主动脉阻断后脊髓各段血供状况的动物实验研究

Experimental Study on the Distribution of Spinal Cord Blood Flow After Thoracic Aorta Crossclamping

目的：了解胸主动脉阻断后转流术或部分体外循环改善脊髓血供的程度。方法：６只家兔分别在左锁骨下动脉远侧和膈肌上方阻断胸主动脉建立脊髓缺血模型，阻断段远、近端灌注印度墨汁。结果：阻断段相应脊髓组织内墨汁分布明显少于远、近侧。结论：胸主动脉阻断后转流术或部分体外循环法，不能完全改善阻断段脊髓血供。

Objective:To study the distribution of spinal cord blood flow during thoracic aortac cross clamping with shunting/partial bypass. Methods:A mixture of 25% Indian ink and 5% gelatin was perfused into the femoral and the subclavian arteries simultaneously after the descending aorta was cross clamped at the subclavian artery and above the diaphragm in six rabbits. Results:Indian ink distribution in the T6 8 segment of the spinal cord decreased significantly. Conclusion:With shunting/partial bypass,spinal cord blood supply is inadequate.