Ang E J, Goh J C, Bose K, Toh S L, Choo A
Department of Orthopaedic Surgery, National University Hospital, Republic of Singapore.
Arch Phys Med Rehabil. 1989 Aug;70(8):644-7.
The axillary crutch is commonly prescribed as an ambulatory aid to patients with temporal or permanent disability in the lower extremity. When fitting the axillary crutch, it is important that the user be instructed not to bear excessive weight on the axillary bar. Excessive weight bearing on the axillary bar can result in a sevenfold increase in the reaction force under the armpit. This force may be a contributory factor to crutch paralysis or thrombosis of the axillobrachial artery. In order to prevent this occurrence an electronic biofeedback device was designed and developed for use in the training of 3-point swing-through axillary crutch ambulation. It detects excessive weight bearing on the axillary bar during crutch ambulation and produces an audible signal which prompts the patient to make necessary adjustment to relieve load bearing on the axillary bar. The design and development of the biofeedback device is discussed in this paper.
腋拐通常被开给下肢有暂时或永久性残疾的患者作为行走辅助工具。在安装腋拐时，重要的是要指导使用者不要在腋杆上承受过多重量。在腋杆上过多承重会导致腋窝下的反作用力增加七倍。这种力可能是导致拐杖麻痹或腋肱动脉血栓形成的一个促成因素。为了防止这种情况发生，设计并开发了一种电子生物反馈装置，用于三点摆动通过式腋拐行走训练。它在拐杖行走过程中检测腋杆上的过多承重，并产生一个可听信号，提示患者进行必要的调整以减轻腋杆上的承重。本文讨论了生物反馈装置的设计与开发。
