How Often Do Patients with High-Flex Total Knee Arthroplasty Use High Flexion?
How Often Do Patients with High-Flex Total Knee Arthroplasty Use High Flexion?
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DOI：
10.1007/s11999-009-0874-y
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发表时间：
2009-07-01
影响因子：
4.2
通讯作者：
Malchau, Henrik
中科院分区：
文献类型：
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作者：
Huddleston, James I.;Scarborough, Donna Moxley;Malchau, Henrik
尽管高屈曲TKA设计旨在安全适应深屈曲，但尚不清楚患者在实验室外使用深屈曲的频率。我们使用经确认的智能活动监测器记录了20例连续患者（21例膝关节）在至少2年随访时膝关节屈曲大于90度的患病率，这些患者接受了高屈曲TKA。患者连续佩戴该器械的平均时间为35.7 ± 0.5小时。21个膝关节屈曲超过90度，平均10 +/- 3.8分钟（0.5%）。屈曲大于90度的活动平均为70%的单肢站立，12%从坐到站，8%步行，7%从站到斜躺，2%踏步，0.9%从躺到站，0.1%跑步。8个膝关节屈曲大于120，平均持续2.2分钟（范围：0.2-15分钟），或占测试时间的0.1%。屈曲大于120度的活动平均为90%的单肢站立，6%从坐到站，3%步行，0.6%从站到斜躺，0.3%踏步，0.1%从躺到站。测试期间任何时间使用的峰值屈曲平均为术后最大屈曲（125 ° +/- 12 °）的84% +/- 11%。这些患者很少使用深屈曲。
Although high-flexion TKA designs aim to safely accommodate deep flexion, it is unknown how often patients use deep flexion outside the laboratory. We used a validated smart-activity monitor to document the prevalence of knee flexion greater than 90 degrees in 20 consecutive patients (21 knees) who had high-flexion TKAs, at a minimum of 2 years' followup. Patients wore the device continuously for a mean of 35.7 +/- 0.5 hours. The 21 knees flexed more than 90 for an average of 10 +/- 3.8 minutes (0.5%). Activities performed with flexion greater than 90 degrees were, on average, 70% in single-limb stance, 12% moving from sitting to standing, 8% walking, 7% moving from standing to reclining, 2% stepping, 0.9% moving from lying to standing, and 0.1% running. Eight knees flexed greater than 120 for an average of 2.2 minutes (range, 0.2-15 minutes), or 0.1% of the testing time. Activities performed with flexion greater than 120 degrees were, on average, 90% in single-limb stance, 6% moving from sitting to standing, 3% walking, 0.6% moving from standing to reclining, 0.3% stepping, and 0.1% moving from lying to standing. Peak flexion used at any time during testing was, on average, 84% +/- 11% of maximum postoperative flexion (125 degrees +/- 12 degrees). These patients rarely used deep flexion.