| Objective: To summarize and analyse the clinical effect of the expandable intramedullary nailing systems and interlocking intramedullary nailing systems in the treatment of humeral midshaft fractures.Methods: From January 2005 to January 2006, 41 cases with humeral midshaft fractures were followed up. They were treated with two kinds of fixations: interlocking intramedullary nail(21cases) and expandable intramedullary nail(20cases). The data of each group were collected for comparison on the following aspects : operative time, blood loss, fluoroscopy exposures, post-operative complication, and healing time of fracture.All of these datas were dealed with spssl0.0,we used the chi square test for categorical variables,and t test for continuous variables.Results: The operative time of the expandable intramedullary nail(58.2min) is less than the interlocking intramedullary nail(95.0min),p <0.05.The blood loss of the expandable intramedullary(?) nail(52.9ml) is less than the interlocking intramedullary nail(68.3ml),p<0.05.The fluoroscopy exposures time of the expandable intramedullary nail(4.0min) is less than interlocking intramedullary nail(6.3min),p <0.05.The number of neural damage of the expandable intramedullary nail(Ocase) is less than the interlocking intramedullary nail(6cases),p <0.05.The healing time of fractures of the expandable intramedullary nail(15.9weeks) is less than interlocking intramedullary nail(16.1weeks),p>0.05.Conclusion: 1.The expandable intramedullary nailing system is very useful in the treatment of humeral midshaft fractures. 2.The expandable intramedullary nailing system is better than the interlocking intramedullary nailing in the control during the operations, including operative time, blood loss, and fluoroscopy exposures. 3.The complication of the patients which is treated by the expandable intramedullary nail is less than the interlocking intramedullary nailing. |
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