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Clinical evaluation of a new approach in the treatment of contracture associated with hip fracture after internal fixation
Lehmann JF, Fordyce WE, Rathbun LA, Larson RE, Wood DH
Archives of Physical Medicine and Rehabilitation 1961 Feb;42(2):95-100
clinical trial
4/10 [Eligibility criteria: No; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: No; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

Based on previous studies, it was assumed that ultrasound is the only heating agent which can raise the temperature in and around the hip joint to therapeutic levels and which can be used safely in the presence of metallic implants. Physiologically, ultrasound increases extensibility of tight periarticular structures and scar tissues; it also has a pain-relieving effect. Thus, if used in conjunction with other physical therapy procedures, it could be anticipated that ultrasound would be most effective in treating the joint contractures which tend to develop in the elderly patient with hip fracture after internal fixation. A statistical comparison of the results obtained with ultrasound and those obtained with infra-red showed that ultrasound was significantly more effective. The study also clinically confirmed the safe use of ultrasound in the presence of metallic implants.

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