ABSTRACT
Objective To evaluate the efficacy and safety of "outside-in" arthroscopic cam resection in the treatment of femoroacetabular impingement (FAI)syndrome.Methods Nine patients were treated with "outside-in" hip arthroscopy for cam or mixed type FAI syndrome between July 2015 and July 2016.All the 9 patients(11 hips)underwent osseous correction of the femoral neck and labral debridement.Before the surgery and 12 months after it,all patients were evaluated using the Harris Score and their complications were observed.Results The average postoperative Harris Score(92.5,range from 64 to 100)was significantly better compared with the preoperative one(56.4,range from 22 to 70,P＜ 0.001).One patient with blister on dorsal foot and another with fluid leakage were cured.No neurovascular injuries or cartilage injuries were found among all the patients.Conclusion "Outside-in" arthroscopic treatment of FAI with osseous correction and labral debridement is safe and effective.
ABSTRACT
Objective To investigat the safe time of SVC interruption in New Zealand rabbits, and help to find the safe time ofSVC interruption in chnical operation. Methods 25 New-Zealand rabbits were separated into 3 groups randomly. Bi-SVC was cross-clamped for one hour, two hours in animal models. The femoral artery or SVC pressures were monitored. The control group (sham op-eration group, 5) were opened chest both sides and monitored femoral artery pressure and SVC pressure for 2 hours. Samples of cere-brum, cerebellum and medulla of rabbits immediately post-operation were studied for water content, light and electric microscopies.The tiny change of brain cells in brain mantle, hippocampus and thalamencephal were observed under electron microscope. Results(1) The SVC pressure of rabbits varied regularly in occlusion groups, which displayed as "upgrade-degression- upgrade again-retain".(2) There was no obvious difference in water content of brain between the one hour group and the control group, both of which weremuch lower than two hours group. (3) The brain tissues were almost in normal construction in one hour group, but encephaledema wasobserved in two hours group. The pathological change of cony brain cells was light and reversible in one hour group. However, in twohours group, necrosis of neuron ceils in brain could be observed, which was irreversible. Concerto The animal model of acuteSVC obstruction was built successfully. Interruption of the SVC for 1 hour was proved safe, with longer interruption of SVC 2 hours,obvious encephaledema and necrosis of neuron cells can be observed.