CASE REPORT


The Management of Complex Regional Pain Syndrome-associated Foot Pain using a Poron Insole, a Sponge Upper Padding, and a Post-operative Shoe: A Case Report



Min Cheol Chang1, Mathieu Boudier-Revéret2, In Sik Park3, Yoo Jin Choo1, *
1 Department of Rehabilitation Medicine, College of Medicine, Yeungnam University, Daegu, Republic of Korea
2 Department of Physical Medicine and Rehabilitation, University of Montreal Health Center, Montreal, Canada
3 Department of Korean Podiatry and Pedorthics Institute, Podiatry and Pedorthics, Republic of Korea


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Creative Commons License
© 2022 Chang et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Physical Medicine and Rehabilitation, College of Medicine, Yeoungnam University 317-1, Daemyungdong, Namku, Taegu, 705-717, Republic of Korea; Tel: +82-53-620-4682; E-mail: cyj361@hanmail.net


Abstract

Background:

Pain from complex regional pain syndrome (CRPS) is frequently refractory to various treatment methods. Here, we present a case wherein foot pain from CRPS I was managed by applying an insole made from poron (a soft polyurethane foam and highly absorbent material for shock reduction), a sponge upper padding, and a post-operative shoe.

Case Presentation:

A 47-year-old female patient with CRPS I on her left foot complained of pain for a few months, which was aggravated while standing and walking [numeric rating scale (NRS): 8]. She had a history of a linear fracture in the distal portion of the left 1st metatarsal bone 5 months ago, and the pain from CRPS started 2 months after the fracture. We believed that the aggravated pain during standing and walking was allodynia. We utilized a poron insole, a sponge upper padding, and a post-operative shoe to reduce the pressure and friction loading on her left foot. 1 month after this intervention, the patients’ pain during standing and walking was found to have reduced from NRS 8 to NRS 3. At her 3- and 6-month follow-ups, the degree of pain was sustained at NRS 3.

Conclusion:

We believe that the reduction of allodynia using materials, which can absorb mechanical pressure and friction of the foot, can help manage pain from CRPS.

Keywords: Complex regional pain syndrome, Allodynia, Pain, Shoe, Case report, Sponge upper padding.