Hardy A E
J Bone Joint Surg Am. 1979 Apr;61(3):365-70.
Five patients with femoral-shaft fractures were treated by cast-brace application and early ambulation. As fracture healing progressed, pressures between the thigh and the cast were recorded with the patients lying still, contracting the quadriceps while lying down, and in four weight-bearing postures. Control results were gained by application of a second cast-brace to three of the patients when they had recovered completely. Resting pressures averaging sixteen millimeters of mercury were recorded under the whole cast. Much higher values were recorded under the proximal two-thirds of the cast, and these increased as healing proceeded. Removal of the hip hinge, thereby eliminating fixed abduction, reduced pressure recordings significantly.
五名股骨干骨折患者采用石膏支具固定并早期下床活动进行治疗。随着骨折愈合进程，分别在患者静卧、仰卧位收缩股四头肌时以及四种负重姿势下记录大腿与石膏之间的压力。当三名患者完全康复后，给他们再次佩戴石膏支具以获取对照结果。整个石膏下记录的静息压力平均为16毫米汞柱。在石膏近端三分之二区域记录到的值要高得多，且随着愈合进程而增加。去除髋铰链，从而消除固定外展，可显著降低压力记录值。
