Objective To investigate the factors that affect platelet-rich plasma (PRP) in promoting bone regeneration and repairing. Methods Recent l iterature was reviewed, concerning the preparations of PRP, physiological mechanism and the latest appl ications in orthopedic field. Results PRP, the concentrated body of autologous platelet, was rich in platelets and was the source of autologous growth factors. Many studies had shown that PRP played an important role in promoting bone regeneration and repairing. However, a few experimental results contradicted this point. The reason might be that the biological properties of PRP were influenced by various factors, such as workmanship, vector, activation schemes, working concentration, individual difference. Conclusion The concentration and qual ity of platelet and other related factorsof PRP affect the rel iabil ity of the results and conclusions. So an efficient and stable production method of PRP should beestabl ished.
ObjectiveTo observe the efficacy of and influencing factors for kirschner wire limited internal fixation plus external fixation for patients with tarsometatarsal fracture dislocation. MethodsThe efficacy of kirschner wire limited internal fixation plus external fixation treatment for patients with tarsometatarsal fracture dislocation treated between January 2004 and June 2009 was retrospectively analyzed,and we also investigated the impact of surgery time and ligament damage on its long-term prognosis. ResultsTwenty patients were included,consisting of 16 male and 4 female patients,ranging from 15 to 57 years old.The mean time of follow-up was 24.5 months,ranging from 11 to 41 months.At the time of follow-up,there were 5%(1/20),10%(2/20),50%(10/20) and 35%(7/20) patients with AOFAS ankle-hindfoot score at 0~69,70~79,80~89 and 90-100,respectively;and the excellent rate was 85% in total.In this cohort,the acceptance rate of the results of treatment was 95% at discharging and 85% at the final follow-up,and the difference between the above two time-points was not statistically significant.In addition,patients with earlier surgery treatment and lower degree of ligament injury had better long-term prognosis. ConclusionFor patients with tarsometatarsal fracture dislocation,treatment with kirschner wire limited internal fixation plus external fixation can not only effectively restore joint function,but also has minimum surgical trauma,and it is an effective method for the treatment of tarsometatarsal joint injuries.
ObjectiveTo explore impact factors related to the clinical applicability of guidelines, and provide suggestions for better development and implementation of guidelines. MethodsThe CNKI database was electronically searched to collect clinical guidelines issued by the Chinese Medical Association and the Chinese Medical Doctor Association from 2015 to 2020. Sixty-one guidelines were randomly selected from included guidelines and each guideline was evaluated by medical staff from three regions using the instrument for evaluating clinical applicability of guidelines (version 2.0). Statistical data were described, and t-test or rank sum test or chi-square test were used for comparison between groups. The impact factors were screened by stepwise logistic regression analysis. ResultsA total of 6 904 valid questionnaires were collected from 119 medical institutions in 26 provinces of China. The more familiar with the guidelines and the more consistent with the wishes of patients or their families, the overall standardized score of the clinical applicability of guidelines would be higher. In addition, the more familiar with the guidelines, the standardized scores in each field would be higher. The higher emphasis on guidelines compliance, the higher the feasibility standardized score. ConclusionIn order to improve the clinical applicability of guidelines, developers should pay attention to whether the recommendations are consistent with the wishes of patients or their families. Then, medical institutions should pay attention to the compliance of guidelines. Finally, medical personnel should be familiar with the recommendations.