ClinicalTrials.gg
RecruitingNCT04210089Updated Oct 2, 2026

Total Contact Soft Cast in Diabetic Foot Ulcers

An interventional study of Total Contact Soft Cast and Cam Boot in Diabetic Foot Ulcer, Diabetes Mellitus and Foot Ulcer, sponsored by University of Minnesota. Recruiting at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-10-02.

Sponsored by University of Minnesota · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Started Oct 2020; still recruiting 6 years later.
Updated Oct 2, 2026Primary completion movedStudy completion movedGo to Updates ↓
Phase
Not applicable
Study type
Interventional
Enrollment
100
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

To determine the effectiveness, compliance, patient tolerance, ease of use and safety of total contact soft cast in diabetic foot ulcers.

Read the detailed description

This study will evaluate whether the use of a total contact soft cast with or without a removable cam boot is as effective in healing diabetic foot ulcers as more commonly used offloading methods.

The total contact soft cast will consist of wound dressing of choice to the ulcer and a plantar foot accommodative offloading felt pad for all foot ulcers, with 4x4 gauze pads added to the arch to create a rocker bottom for metarsophalangeal joint (MPJj) and plantar heel ulcers. The next layers will be:

  • Unna boot from MPJs to just below the knee,
  • Sterile Kerlix from MPJs to just below the knee
  • Sterile 4 inch Kling wrap from the MPJs to just below the knee,
  • Four inch coban from MPJs to just below the knee, and
  • Ace wraps from MPJs to just below the knee

Removable diabetic cam boot will be used in patients willing and capable of using it. If patient does not want to use diabetic cam boot then surgical shoe or regular shoe would be options.

02

Conditions studied

  • Diabetic Foot Ulcer
  • Diabetes Mellitus
  • Foot Ulcer
  • Foot Ulcer, Diabetic
  • Ulcer
  • Ulcer Foot
  • Ulcer, Leg
  • Ankle Ulcer
03

In context

Diabetic Foot

1,077 studies on the registry are indexed under Diabetic Foot; 222 are open to participants now.

This study's planned enrollment of 100 is above the median of 60 across 847 interventional studies indexed under Diabetic Foot.

Browse Diabetic Foot studies →

Lead sponsor

University of Minnesota is the lead sponsor of 1,216 studies on the registry; 197 are open to participants now.

Of its 136 completed or terminated interventional studies of FDA-regulated products, 95 (70%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

- Any adult with a diabetic foot ulcer

Exclusion criteria

Exclusion Criteria:

  • Allergy to Calamine or Zinc oxide
  • Inability to have leg wrapped
  • Inability to be seen weekly or as needed
  • Unable or unwilling to consent
  • Prisoners
  • Persons lacking capacity to consent
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Outcomes assessor)
Enrollment
100 participants (estimated)

Study arms

  • Experimental
    Soft Cast with a Removable Cam Boot

    Patients with a foot, ankle, or lower leg ulcer (which we expect to be mostly diabetic foot ulcers) will be provided with a total contact soft cast with removable cam boot.

    Device: Total Contact Soft Cast · Device: Cam Boot

  • Experimental
    Soft Cast without a Removable Cam Boot

    Patients with a foot, ankle, or lower leg ulcer (which we expect to be mostly diabetic foot ulcers) will be provided with a total contact soft cast.

    Device: Total Contact Soft Cast

  • No intervention
    Conventional

    Patients with a foot, ankle, or lower leg ulcer (which we expect to be mostly diabetic foot ulcers) will use conventional offloading including total contact casting, removable cast boots (cam boots), CROW boots, bracing, AFO's, offloading shoes, insoles, padding, shoe modifications, crutches, wheelchairs, rollabout, and surgical correction.

Interventions

  • DeviceTotal Contact Soft Cast

    The total contact soft cast will consist of wound dressing of choice to the ulcer and a plantar foot accommodative offloading felt pad for all foot ulcers, with 4x4 gauze pads added to the arch to create a rocker bottom for metarsophalangeal joint (MPJj) and plantar heel ulcers. The next layers will be: * Unna boot from MPJs to just below the knee, * Sterile Kerlix from MPJs to just below the knee * Sterile 4 inch Kling wrap from the MPJs to just below the knee, * Four inch coban from MPJs to just below the knee, and * Ace wraps from MPJs to just below the knee

  • DeviceCam Boot

    Removable Diabetic cam boot will be used in patients willing and capable of using it. If patient does not want to use Diabetic cam boot then surgical shoe or regular shoe would be options.

06

What researchers measure

Primary outcomes

  1. Complete Healing Rates

    Complete healing is defined as complete epithelization of the ulcer. Outcome will be reported in days.

    Time frame: 16 weeks

Secondary outcomes

  1. Patient Compliance with Use of the Total Contact Soft Cast

    The percentage of patients who use the total contact soft cast until complete healing or 16 weeks of treatment will be calculated.

    Time frame: 16 weeks

  2. Patient Complications

    The percentage of patients who need to stop using the soft case due to complications will be calculated.

    Time frame: 16 weeks

07

Study locations

1 of 1 sites recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

1 registry update since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedDate before it movedWhere the date was before it movedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Oct 2020 (actual). Primary completion is estimated for Oct 2027, 83 months after the start.

Of 240 non-industry interventional studies with no phase under Diabetic Foot, half reached primary completion within 21 months of starting (the median), counting those still running; a quarter within 7 and three quarters within 37. This study's planned 83 months is above that.

Counting every sponsor, half of 343 studies reached it within 22 months; a quarter within 9 and three quarters within 39.

Since we started tracking on Sep 25, 2026, the dates moved once, on Oct 2, 2026: primary completion Oct 2026 → Oct 2027 and completion Oct 2026 → Oct 2027.

Earlier changes are on the record history on ClinicalTrials.gov ↗

How these figures are worked out, and which studies are left out of them.

Registered
Dec 20, 2019
First posted
Dec 24, 2019
StartActual
Oct 13, 2020
Primary completionEst.
Oct 1, 2027was Oct 2026
CompletionEst.
Oct 1, 2027was Oct 2026
Last update
Oct 2, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
Primary completion
Oct 1, 2026→Oct 1, 2027
Oct 2, 2026
Study completion
Oct 1, 2026→Oct 1, 2027
Oct 2, 2026
Show all 1 update
  1. Oct 2, 2026
    Primary completion Oct 1, 2026→Oct 1, 2027
    Study completion Oct 1, 2026→Oct 1, 2027
    + 1 other change: verification date

From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗

10

Registry details

Key details

Study ID
NCT04210089
Responsible party
Sponsor
First posted
Dec 24, 2019
Start date
Oct 13, 2020
Primary completion
Oct 1, 2027 (estimated)
Completion
Oct 1, 2027 (estimated)
Last update
Oct 2, 2026

Study contacts

Joseph Schuster
Contact
schus122@umn.edu
612-273-9400
Joseph Schuster, DPM
principal investigator · University of Minnesota

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
Yes
View the source record on ClinicalTrials.gov ↗

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