Dunbar M J, Gross M
Department of Surgery, Dalhousie University, Halifax, Nova Scotia, Canada.
Int Orthop. 1995;19(5):265-8. doi: 10.1007/BF00181105.
We have analyzed the operation of knee arthroplasty using the Whiteside Mark II prosthesis, and found that it could be broken down into 42 steps, some of which are more important than others and can be considered as critical. We have identified 4 criteria to evaluate a critical step: 1) it must be necessary to complete the procedure, 2) it must take a significantly longer time to perform than other steps, 3) it must be revised significantly more frequently than other steps and 4) it must take significantly longer to revise than other steps. Two steps have been found to which all 4 criteria applied, namely placement of the femoral cutting jig and the first femoral saw cuts.
我们分析了使用Whiteside Mark II假体进行膝关节置换术的操作，发现其可分解为42个步骤，其中一些步骤比其他步骤更重要，可视为关键步骤。我们确定了评估关键步骤的4条标准：1）它必须是完成手术所必需的；2）执行该步骤所需的时间必须明显长于其他步骤；3）它必须比其他步骤更频繁地进行修正；4）修正该步骤所需的时间必须明显长于其他步骤。已发现有两个步骤符合所有这4条标准，即股骨截骨导向器的放置和首次股骨锯切。
