患肌是存在一个或多个肌筋膜触发点的肌肉，也是在运动中枢正常的情况下，完全放松时仍处于紧张状态的肌肉。缺血缺氧是患肌的本质，肌肉紧张或痉挛造成收缩功能下降的是患肌表现，紧、僵、硬、滑是患肌的特征，纠正缺血缺氧状态、消除患肌是浮针疗法作用的关键。浮针疗法通过皮下扫散及再灌注活动解除肌肉紧张、缓解疼痛、改善膝关节屈伸活动，促进术后患者功能恢复。本文从患肌角度探讨浮针在全膝关节置换术后患者康复中的作用，为临床提供一种新的诊疗思路和严谨的科研资料，并为浮针的临床使用提供更有力的循证医学依据。

The pathological tight muscle is the one that has one or more myofascial trigger points, that is, a muscle that remains tense when the motor center is fully relaxed. Ischemia and hypoxia are the essence of the pathological tight muscle. The decrease in systole function caused by muscle tension and spasm is the manifestation of the pathological tight muscle.Being tight, stiff, hard and slippery are the characteristics of the pathological tight muscle. Floating needle therapy can relieve muscle tension, relieve pain, improve knee flexion and extension, and promote postoperative functional recovery of patients through subcutaneous scrolling and reperfusion activities.This paper discusses the role of floating needle in the rehabilitation of patients after total knee arthroplasty from the perspective of affected muscle, providing a new diagnosis and treatment idea and rigorous scientific research data for the clinic, and providing a more powerful evidence-based medical basis for the clinical use of floating needle.