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Objective To determine the effect of trunk motion control on knee biomechanics during single-leg landing. Methods Twenty male healthy basketball players were recruited. The kinematics, kinetics parameters and surface electromyogram (EMG) of knee joints under trunk motion control during single-leg landing were studied by using Vicon motion Analysis system, Kistler force platform and Noraxon surface EMG system. Results Compared with natural landing, there were significant differences in flexion angle at initial contact moment, peak flexion angle and peak flexion moment during deeply inspiratory landing and landing with a stick, and a significantly larger flexion angle at initial contact moment, a larger peak flexion angle and smaller peak flexion moment were also found. Compared with natural landing, there was no statistical difference in peak valgus angle and peak valgus moment, as well as EMG activity of hamstrings, quadriceps muscles of the knee during deeply inspiratory landing and landing with a stick. Conclusions Deeply inspiratory landing or landing with a stick reduce the risk of anterior cruciate ligament (ACL) injury, and the results provide the theoretical basis for prevention of ACL injuries in basketball players during landing.
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BACKGROUND: Hip arthroplasty and internal fixation with intramedullary cannulated screws are mainly used for senile femoral neck fractures. However, osteoporosis can usually lead to failure in internal fixation.OBJECTIVE: To analyze the joint function after fixed with intramedullary cannulated screws in elderly patients with femoral neck fractures, and to explore the factors related to functional recovery.METHODS: Clinical data of 89 patients with femoral neck fractures undergoing internal fixation with intramedullary cannulated screws after 2-year follow-up were analyzed retrospectively. The sex, age, Garden type, bone mineral density, body mass index, screw distribution, reduction index, operation time, bearing time and Harris hip scores were analyzed. Rank related analysis and accumulative Logistic regression analysis were performed on SPSS18.0 software. RESULTS AND CONCLUSION: (1) Normal Q-Q plot and normality test results indicated that the Horris scores in all patients after 2-year follow-up presented with skewed distribution (P=0.000). (2) Rank related analysis showed that age,Garden type, bone mineral density, and reduction index were related with Harris score (P < 0.05 or P < 0.01). (3) Accumulative Logistic regression analysis showed that the independent variables including age, Garden type, bone mineral density, and reduction index made significant effect on Harris hip scores. (4) To conclude, age, Garden type,bone mineral density, and reduction index are important factors for functional recovery of the hip after fixed with intramedullary cannulated screws.
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Objective To study the variation of serum IL-6,IL-8,TNF-α and CRP in perioperative patients with pancreatitis. Methods 39 caaes in perioperative patients with pancreatitis in our hospital from January 2008 to 2010 April were selected as observation group,and 39 healthy people were selected as control group,and the serum IL-6,IL-8,TNF-α and CRP of the observation group before the treatment and after the treatment at 4h,at the first day, at the second day and the seventh day and the control group were detected, and the results were analyzed and compared. Results The serum IL-6,IL-8 ,TNF-α and CRP of the observation group before the treatment were higher than those of the control group( all P ＜ 0. 01 ) there were significant differences, and the levels of the observation group at 4h,at the first day,and at the second day showed decreasing,the levels compared to those of the control group( all P ＜ 0. 05 ) there were significant differences, the levels of the observation group at seventh day were compared to those of the control group(all P＞0. 05) there were no significant differences. Conclusion It was regulation of the variation of serum IL-6, IL-8 ,TNF-α and CRP in perioperative patients with pancreatitis, and tit could provide evidence for the treatment.