Does preoperative malalignment increase risk of failure after total knee arthroplasty?
Patients with excessive preoperative alignment (>8° of varus or >11° of valgus) have a greater risk of failure (2.3%). Neutral postoperative alignment (2.5° through 7.4° of valgus) improves (1.9% for preoperatively deformed knees) but does not completely eliminate the risk of failure (0.5% for knees that were neutral both preoperatively and postoperatively). Careful attention should be paid to knee alignment during total knee arthroplasty, especially for patients with severe preoperative deformities.
Prompt and aggressive non-operative approach of oesophageal perforations in children allows survival and conservation of the organ and its function in most cases and should remain the first therapeutic choice at this age.