knee restraint

例句：

1. 1.The patient was placed in a knee restraint to prevent further injury.
   患者被放置在膝盖约束装置中以防止进一步受伤。
2. 2.The doctor recommended the use of a knee restraint during the surgery.
   医生建议在手术中使用膝盖约束装置。
3. 3. The child was strapped into a knee restraint while the operation was being performed.
   孩子在手术过程中被绑在膝盖约束装置上。