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目的探讨滋养动脉结扎对胫骨血供的影响。方法采用放射性核素显像法观察滋养动脉结扎后兔胫骨血供的变化。结果滋养动脉结扎后当天，胫骨各段的血供均呈不同程度下降 (P< 0.05)，其中胫骨远段骨干下降幅度最大，近段骨干及近干骺端次之，远干骺端下降最少。术后第 4 d远段骨干血供较前恢复，近段骨干及近干骺端超过健侧，远干骺端恢复正常。第 9 d后，除远段骨干外，其余三骨段均恢复正常。远段骨干的缺血状况直至第 24 d才恢复正常。结论滋养动脉结扎对胫骨各段血供均有影响，由重至轻依次为远段骨干，近段骨干，近干骺端，远干骺端。除远段骨干外，其余骨段血供恢复较快。远段骨干较长时间缺血可能是该段骨折愈合困难的原因。
Objective To investigate the effect of nodal artery ligation on tibial blood supply. Methods The radionuclide imaging was used to observe the blood supply of tibia in rabbits after nodal artery ligation. Results On the day after the nodal artery was ligated, the blood supply of each segment of tibia decreased to different extents (P <0.05). The distal part of the tibia had the largest decrease, the proximal part of the trunk and the proximal metaphysis, and the least metaphysis . At 4 days after operation, the blood supply to the distal trunk was recovered earlier, and the proximal trunk and proximal metaphysis over the healthy side, and the distal metaphysis returned to normal. After the 9th day, except for the distal segment, all the other three segments returned to normal. The distal part of the backbone of the ischemic condition until 24 days before returning to normal. Conclusion Nourish artery ligation has influence on the blood supply of each segment of tibia, from heavy to light followed by distal segment, proximal segment, proximal metaphysis and distal metaphysis. In addition to distal backbone, the rest of the bone blood supply recovery faster. A longer period of ischemia distal bone may be the reason for the difficult fracture healing.