Microprocessor-based plantar pressure measurement system for rehabilitation of lower limb

以微處理機為基礎研製腳底壓力量測系統─應用於下肢復健

周伯禧(Paul Pei-Hsi Chou) ； 周有禮(You-Li Chou) ； 鮑建國(Jian-Guo Bau) ； 廖本義(Ben-Yi Liau) ； 陳信介(Hsin-Chieh Chen)

《弘光學報》 64期 (2011/09) Pp. 175-188

https://doi.org/10.6615/HAR.201109.64.13

摘要

對於下肢骨折病患於執行復健療程中，適當的下肢載重訓練有助於骨痂成形，進而促進下肢骨折的瘉合，加速患者的復原。但是，復健的過程中，患者自身很難將載重控制在某一安全範圍內。因此，本文研究主旨為設計一套以微處理器為基礎具生物回饋之下肢載重回饋復健系統，讓患者可以藉此系統，在復健過程態訓練中把載重控制在有效而安全的範圍內。本文提出的系統是以五個壓力感測器埋設於鞋墊上，量測腳底五個較重要的區域之壓力值，如腳後跟中心、蹠骨及腳拇趾等…。本系統有兩個重要的特色：(1)在步態過程，當載重超過預設的限值時，控制器會發出聲響，藉此聲音的回饋作用，患者可以調整載重以控制在預期的載重範圍內。(2)記憶體裝置的設計，可將復健過程中的載重資料提供作為臨床分析。實驗結果得知，壓力感測器的線性度及人體實際量測均能符合預期之結果，確認此量測系統的可靠性。此結果並可做為下一階段臨床上的應用。

並列摘要

Evaluating plantar pressure plays a crucial role in the treatment of patients undergoing rehabilitation for fractures of the lower limb. During the rehabilitation process, the repeated application of a higher than usual plantar pressure is a major factor in developing formation of callus. However, it is important that an appropriate pressure loading on the basis of the patient’s weight is applied to ensure an efficient callus recovery. Consequently, this paper develops a microprocessor-based, portable, ambulatory foot pressure measurement system. In the proposed system, five pressure sensors are placed in appropriate positions on the outsole of the patient’s shoe, i.e. under the medial of the heel, and at the metatarsal heads and the hallux, to measure the pressure acting on the foot. The measurement system has two important features: (1) an acoustic alarm which sounds when the weight-bearing exceeds the predetermined plantar pressure; (2) an embedded memory storage device to store the pressure data for subsequent clinical analysis during the rehabilitation process. The effective operation of the proposed measurement system is verified experimentally by its accuracy and dynamical response.

並列關鍵字

Foot pressure ； Pressure sensor ； Rehabilitation ； Microprocessor

參考文獻

C. Rolian, D. E. Lieberman, J. Hamill, J. W. Scott3, W. Werbel. “Walking, running and the evolution of short toes in humans.” J. Exp. Biol. 212(2009): 713-21.

A. Findlow, J. Y. Goulermas, C. Nester. “Predicting lower limb joint kinematics using wearable motion sensors.” Gait & Posture 28(2008): 120-6.

D. A. Bruening, K. M. Cooney, F. L. Buczek, J. G. Richards. “Measured and estimated ground reaction forces for multi-segment foot models.” J. Biomech. 43(2010): 3222-6.

B. G. Edwards. “Controlateral and ipsilateral cane usage by patients with total knee or hip replacement.” Arch. Phys. Med. Rehabil. 67(1986): 734-40.

I. J. Harrington. “Static and dynamic loading patterns in knee joints with deformities.” J. Bone Joint Surg. 65-A(1983): 247-59.