Abstract
The authors retrospectively reviewed 27 consecutive patients with 29 fractures of the distal femur treated with the new retrograde expandable nail. One 10-mm diameter nail that expands to 16 mm was used with the possibility of locking in the condylar area only. Retrieved data included single versus multiple injuries, fracture type, operation time, reaming or nonreaming, hospitalization and healing times, and intra- and postoperative complications. The overall average operation time was 96 (range 40-320) minutes, but only 65 (range 40-120) minutes for isolated fractures. The overall mean hospitalization time was 16 (range 3-40) days, but only 7 (range 4-10) days for isolated fractures. Follow-up continued until fracture healing or for a minimum of 1 year (average 14 months, range 12-24 months). The average clinical union time was 83 (range 43-179) days, and the mean radiographic healing was 87 (range 43-179) days. One patient developed a nonunion that required exchange of the nail to the same device. Another patient underwent hardware removal during a procedure for a torn meniscus. These preliminary results demonstrate satisfactory healing and alignment for the treatment of distal femoral shaft fractures by means of this new device without jeopardizing the knee joint by nail protrusion.
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