Pressure offloading is widely regarded as the single most important intervention for healing a plantar diabetic foot ulcer. Because peripheral neuropathy removes the protective sensation of pain, patients continue to walk on an open wound, and the repetitive mechanical stress at that site prevents the tissue from closing. Understanding how offloading works, which devices are most effective, and why real-world practice often falls short is essential for anyone involved in diabetic foot care.
Why Offloading Matters
Diabetic foot ulcers carry serious consequences. They are strongly associated with lower-extremity amputation and increased mortality, and the ulcers most amenable to offloading are neuropathic plantar wounds on the forefoot or midfoot, where body weight concentrates pressure during each step. In these wounds, redistributing or removing that pressure allows the body’s normal healing processes to proceed.
According to the International Working Group on the Diabetic Foot (IWGDF), whose evidence-based guidelines have been updated since 1999, offloading is “arguably the most important of multiple interventions needed to heal a neuropathic plantar foot ulcer.” Their systematic review, conducted using GRADE methodology, established a clear hierarchy of device choices that continues to guide practice today.
The Hierarchy of Offloading Devices
The IWGDF 2019 offloading guideline recommends a nonremovable knee-high offloading device as the first-choice treatment for a neuropathic plantar forefoot or midfoot ulcer. This category includes the total contact cast (TCC) and an irremovable cast walker. A removable knee-high device is second choice, a removable ankle-high device is third choice, and appropriately fitting footwear combined with felted foam is reserved as a fourth-choice option when other approaches are contraindicated or not tolerated.
The Total Contact Cast as Gold Standard
The total contact cast remains the reference standard because it distributes pressure across the entire plantar surface and lower leg while limiting ankle motion. A 2025 biomechanical study of offloading devices found that the TCC and comparable devices produced significant peak plantar pressure reductions in eight of nine plantar foot regions compared with controls, reaffirming the TCC as the first line of treatment.
The central advantage of a nonremovable device is that it enforces adherence. A removable boot only offloads the wound when the patient actually wears it, and many do not wear it consistently. By contrast, a cast the patient cannot take off guarantees that the wound is protected during every step throughout the day.
The Comfort-Versus-Pressure Trade-off
Newer alternatives attempt to preserve offloading while improving tolerability. The total contact softcast is shorter, lighter, and partially flexible. A 2025 plantar pressure study of 20 patients found that peak pressure at the ulcer site was significantly higher in the softcast than in a conventional TCC, yet patient-reported comfort during walking was markedly better. A related retrospective analysis reported broadly similar healing outcomes between softcast and TCC, with roughly 71% of ulcers healing overall, suggesting the added comfort may not come at an unacceptable cost to healing. These findings illustrate a recurring tension in offloading: the most effective device is not always the one patients will accept, and clinicians must balance biomechanical performance against real-world usability.
The Gap Between Guidelines and Practice
Despite strong evidence, gold-standard offloading is consistently underused. A 2023 survey of prosthetic and orthotic clinics found that 86% of practitioners treated neuropathic forefoot ulcers with modified off-the-shelf footwear and insoles, the very approach the IWGDF strongly recommends against, while total contact casting was provided by only 20% and nonremovable knee-high walkers by none. Many practitioners were unaware that the TCC and nonremovable walker are considered the gold standard. This mismatch between evidence and routine care represents a significant, and largely correctable, opportunity to improve healing rates.
Offloading Beyond Ulcer Healing
Offloading also plays a role in the active Charcot foot, where prolonged immobilization in a total contact cast reduces the risk of deformity. A 2024 pilot study reported that patients offloaded during the earliest (stage 0) phase of Charcot required shorter casting durations and had a lower risk of recurrence and reconstructive surgery than those treated later. And once an ulcer heals, the work is not finished: custom orthotics and therapeutic footwear are essential to lower the plantar pressures that drive recurrence, making offloading a lifelong component of care rather than a one-time treatment.
Key Takeaways
Offloading is the cornerstone of diabetic foot ulcer healing. The evidence supports a nonremovable knee-high device, particularly the total contact cast, as the first-choice treatment for neuropathic plantar ulcers, primarily because it removes the variable of patient adherence. Newer softcast options offer a comfort advantage that may improve acceptance, though at some cost to pressure reduction. Perhaps the most actionable insight is that the greatest gains may come not from new technology but from closing the well-documented gap between what guidelines recommend and what is delivered in everyday practice. After healing, appropriate footwear and orthotics remain critical to preventing recurrence.
References
Bus SA, Armstrong DG, Gooday C, et al. Guidelines on offloading foot ulcers in persons with diabetes (IWGDF 2019 update). Diabetes/Metabolism Research and Reviews. 2020;36(S1):e3274. doi:10.1002/dmrr.3274
Bus SA, Monteiro-Soares M, Game F, et al. Standards for the development and methodology of the 2023 IWGDF guidelines. Diabetes/Metabolism Research and Reviews. 2023;40(3):e3656. doi:10.1002/dmrr.3656
Dinh TL. Nonsurgical Offloading of the Diabetic Foot. Clinics in Podiatric Medicine and Surgery. 2025;42(4):647-656. doi:10.1016/j.cpm.2025.06.015
Carter SL, Law JHM, Seyler N, et al. Removable and Nonremovable Off-Loading Devices. Journal of the American Podiatric Medical Association. 2025;115(3). doi:10.7547/21-119
Hutting KH, Vierhout BP, Visser R, et al. Plantar pressure measurements to investigate the offloading effect of total contact softcast and total contact cast for plantar diabetic foot ulcers. Clinical Biomechanics. 2025;125:106511. doi:10.1016/j.clinbiomech.2025.106511
Vierhout BP, Visser R, Hutting KH, et al. Comparing a non-removable total contact cast with a non-removable softcast in diabetic foot ulcers. Diabetes Research and Clinical Practice. 2022;191:110036. doi:10.1016/j.diabres.2022.110036
Gigante I, Sigurjónsdóttir ED, Jarl G, Hellstrand Tang U. Offloading of diabetes-related neuropathic foot ulcers at Swedish prosthetic and orthotic clinics. Diabetes/Metabolism Research and Reviews. 2023;39(4):e3611. doi:10.1002/dmrr.3611
Schoug J, Katzman P, Fagher K, Löndahl M. Charcot Foot Offloading in Stage 0 Is Associated With Shorter Total Contact Cast Treatment and Lower Risk of Recurrence and Reconstructive Surgery: A Pilot Study. Diabetes Care. 2024;47(2):252-258. doi:10.2337/dc23-1063
Comments
