50 and older, any sex, with Venous Hypertension Ulcers or Venous Stasis Ulcer. Patients with the condition only — healthy volunteers not accepted.
Results — posted to ClinicalTrials.gov
Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.
Number of Participants With Ulcer RecurrencePrimary· Through study completion at 6 months from baseline
Number of recurrent ulcers that develop during the 6 month study period for in participants for 4 groups of patients with previously healed venous leg ulcers receiving the cooling gel pack and cooling cotton pack and those with previously healed diabetic foot ulcers receiving the cooling gel pack or cooling cotton pack.
Group
Value
95% CI
Cooling Gel Pack - Venous Leg Ulcer
6
Cooling Cotton Pack - Venous Leg Ulcer
3
Cooling Gel Pack - Diabetic Foot Ulcer
11
Cotton Cooling Pack - Diabetic Foot Ulcer
5
Change in Pain (Worst Pain, Least Pain, Pain Now)Primary· Through study completion at 6 months from baseline
Pain was measured with a visual analog scale and reported numerically (0 to 10 with 10 being the most severe pain) at baseline and at 6 months end of study
Worst pain
Group
Value
95% CI
Cooling Gel Pack - Venous Leg Ulcer
0.85
-0.1 – 1.6
Cooling Cotton Pack - Venous Leg Ulcer
0.4
-0.6 – 1.3
Cooling Gel Pack - Diabetic Foot Ulcer
0
-1.6 – 1.6
Cooling Cotton Pack - Diabetic Foot Ulcer
-1.0
-2.3 – 0.3
Least pain
Group
Value
95% CI
Cooling Gel Pack - Venous Leg Ulcer
0.3
-0.2 – 0.8
Cooling Cotton Pack - Venous Leg Ulcer
0
-0.6 – 0.6
Cooling Gel Pack - Diabetic Foot Ulcer
-0.1
-0.8 – 0.6
Cooling Cotton Pack - Diabetic Foot Ulcer
0
0 – 0
Pain now
Group
Value
95% CI
Cooling Gel Pack - Venous Leg Ulcer
0.4
-0.06 – 0.9
Cooling Cotton Pack - Venous Leg Ulcer
0.14
-0.3 – 0.5
Cooling Gel Pack - Diabetic Foot Ulcer
0.1
-0.1 – 0.3
Cooling Cotton Pack - Diabetic Foot Ulcer
-0.1
-0.4 – 0.1
Differences in Step CountsPrimary· Through study completion at 6 months from baseline
Differences in step counts reported via accelerometer data, from baseline to post treatment at 6 months end of intervention for the 4 groups.
Group
Value
95% CI
Cooling Gel Pack - Venous Leg Ulcer
17295
9259 – 25332
Cooling Cotton Pack - Venous Leg Ulcer
14234
6874 – 21593
Cooling Gel Pack - Diabetic Foot Ulcer
13232
2909 – 23555
Cotton Cooling Pack - Diabetic Foot Ulcer
15479
5614 – 25343
Change in Mean Scores on Quality of Life Measured With the VEINES QOL/Sym QuestionnairePrimary· Through study completion at 6 months from baseline
The Venous Insufficiency Epidemiological and Economic Study-Quality of life/Symptoms (VEINES QOL/Sym) Questionnaire was used to evaluate quality of life. A sum score is provided as an overall quality of life score for both the QOL and Sym portions of the questionnaire. This instrument was used only for the VLU groups because it is a disease-specific measure. Of the 26 items in the questionnaire, 25 items are combined to create a summary score (VEINES-QOL). One item which asks about the time of day the leg problem is most intense, question 2, provides only descriptive information and is not sco
Quality of life
Group
Value
95% CI
Cooling Gel Pack
13.8
4.0 – 23.5
Cooling Cotton Pack
-4.8
-121.6 – 111.9
Symptoms
Group
Value
95% CI
Cooling Gel Pack
24.2
13.8 – 34.5
Cooling Cotton Pack
-4.3
-7.4 – -1.1
Changes in Severity and Intensity Pain Scores Measured With the Brief Pain InventoryPrimary· Through study completion at 6 months from baseline
The Brief Pain Inventory (BPI) scale is reported as an average score. BPI rapidly assesses the severity of pain and its impact on functioning for intensity and Pain Intensity and Pain Interference. Pain Intensity is measured in four categories: worst, least, on average, and currently, while Pain Interference is measured in 7 categories: mood, work, general activity, walking, relationships, enjoyment of life, and sleep. The patient rates each of these on a scale from 0-10, 10 being excruciating pain intensity and a complete interference in their life. Subscores are determined by averaging over
Severity
Group
Value
95% CI
Cooling Gel Pack - Venous Leg Ulcer
-0.5
-1.0 – 0.01
Cooling Cotton Pack - Venous Leg Ulcer
-0.2
-0.8 – 0.4
Cooling Gel Pack - Diabetic Foot Ulcer
0
-0.5 – 0.5
Cotton Cooling Pack - Diabetic Foot Ulcer
0.4
-0.1 – 0.9
Interference
Group
Value
95% CI
Cooling Gel Pack - Venous Leg Ulcer
-0.4
-0.8 – 0.08
Cooling Cotton Pack - Venous Leg Ulcer
-0.5
-1.1 – 0.1
Cooling Gel Pack - Diabetic Foot Ulcer
-0.1
-0.2 – 0.1
Cotton Cooling Pack - Diabetic Foot Ulcer
0.1
-0.2 – 0.3
Change in METS Minutes Engaging in Physical Activity Measured With The International Physical Activity QuestionnairePrimary· Through study completion at 6 months from baseline
Change in metabolic equivalent of task (METS) min per week for physical activity per The International Physical Activity Questionnaire reported for 4 groups from baseline to 6 months end of study. Scoring HIGH indicate physical activity levels equate to \~1hour of activity per day or more at least moderate intensity level or engage in vigorous intensity activity on at least 3 days achieving a minimum total physical activity of at least 1500 MET min a week or 7 or more days of any combination of walking, moderate intensity or vigorous intensity activities achieving a minimum total physical acti
Group
Value
95% CI
Cooling Gel Pack - Venous Leg Ulcer
73
-623 – 767
Cooling Cotton Pack - Venous Leg Ulcer
799
-507 – 2104
Cooling Gel Pack - Diabetic Foot Ulcer
1921
1151 – 4993
Cooling Cotton Pack - Diabetic Foot Ulcer
225
-255 – 705
Time Spent in Minutes Engaging in Physical ActivitiesPrimary· Through study completion at 6 months from baseline
Mean time spent in minutes engaging in physical activities, reported via accelerometer data, from baseline to post treatment at 6 months end of intervention for the 4 groups.
Group
Value
95% CI
Cooling Gel Pack - Venous Leg Ulcer
1420
-2448 – 5288
Cooling Cotton Pack - Venous Leg Ulcer
2523
-765 – 5811
Cooling Gel Pack - Diabetic Foot Ulcer
135
28 – 242
Cotton Cooling Pack - Diabetic Foot Ulcer
157
55 – 260
Participant Adherence to the Study ProtocolSecondary· Daily measures starting at baseline for temperature and every other day cooling application during the 6-month study period.
Using study data logs, appropriate use of the thermometer and cooling pack was measured by the number of participants who adhered to the protocol for taking the temperature of the skin over the healed venous leg or diabetic foot ulcer. Adherence was defined as: the number of participants who were at least 80% adherent to taking their temperatures with the infrared thermometer each morning and the number of participants who were at least 80% adherent to performing the intervention every other day = 3 times times per week during the 6-month study period.
Temperature
Group
Value
95% CI
Adherence
106
Cooling
Group
Value
95% CI
Adherence
82
Number of Participants Indicating 'Yes' or 'Easy' on Study Instructions, Thermometer Use, Completing Logs, Performing Treatment, HelpfulnessSecondary· Survey conducted at end of the 6-month study period.
Patients satisfaction was measured by study personnel a during end of study phone survey with the following questions asked as follows (Yes/No): Were study instructions adequate, was thermometer easy to use, found cooling helpful, would cool skin area if it was proven that cooling prevented reulceration; (Easy/Not Easy): completing logs, performing the cooling treatment. Data are for (Yes/No) as number of participants who reported "yes" or if (Easy/Not Easy) the number of participants who reported "easy."
Study Instructions Adequate - Yes
Group
Value
95% CI
Cooling Gel Pack - Venous Leg Ulcer
36
Cooling Cotton Pack - Venous Leg Ulcer
34
Cooling Gel Pack - Diabetic Foot Ulcer
26
Cotton Cooling Pack - Diabetic Foot Ulcer
25
Using Thermometer Easy - Yes
Group
Value
95% CI
Cooling Gel Pack - Venous Leg Ulcer
36
Cooling Cotton Pack - Venous Leg Ulcer
32
Cooling Gel Pack - Diabetic Foot Ulcer
27
Cotton Cooling Pack - Diabetic Foot Ulcer
25
Completing Logs - Easy
Group
Value
95% CI
Cooling Gel Pack - Venous Leg Ulcer
36
Cooling Cotton Pack - Venous Leg Ulcer
33
Cooling Gel Pack - Diabetic Foot Ulcer
27
Cotton Cooling Pack - Diabetic Foot Ulcer
25
Performing Cooling -Treatment - Easy
Group
Value
95% CI
Cooling Gel Pack - Venous Leg Ulcer
35
Cooling Cotton Pack - Venous Leg Ulcer
31
Cooling Gel Pack - Diabetic Foot Ulcer
26
Cotton Cooling Pack - Diabetic Foot Ulcer
24
Cooling Helpful - Yes
Group
Value
95% CI
Cooling Gel Pack - Venous Leg Ulcer
31
Cooling Cotton Pack - Venous Leg Ulcer
21
Cooling Gel Pack - Diabetic Foot Ulcer
21
Cotton Cooling Pack - Diabetic Foot Ulcer
18
Would Cool if Found to Prevent Re-Ulceration - Yes
Group
Value
95% CI
Cooling Gel Pack - Venous Leg Ulcer
34
Cooling Cotton Pack - Venous Leg Ulcer
33
Cooling Gel Pack - Diabetic Foot Ulcer
24
Cotton Cooling Pack - Diabetic Foot Ulcer
25
Knowledge Questionnaire of Study InstructionsSecondary· Baseline after participant enrollment
Participants were administered a 12-item (yes/no) questionnaire (test) during instruction at the start of the study, provided by the research personnel to determine comprehension of the protocol and to reinforce study procedures. Score of 12 or 100% was given for all items scoring correctly (1 point per item). Any items for which "no" was answered, remediation was conducted by study personnel at the time the questionnaire was conducted. Means scores are reported per VLU and DFU cooling pack intervention and VLU and DFU cotton cooling pack control.
Group
Value
95% CI
Cooling Gel Pack - Venous Leg Ulcer
11.7
11 – 12
Cooling Cotton Pack - Venus Leg Ulcer
11.9
11 – 12
Cooling Gel Pack - Diabetic Foot Ulcer
11.8
11 – 12
Cotton Gel Pack - Diabetic Foot Ulcer
11.9
11 – 12
Adverse events — posted to ClinicalTrials.gov
Time frame: Data were collected for each participant for 6 months during study enrollment period..
Reporting threshold: 0%.
Adverse-event reports describe events observed during the trial — not all are caused by the drug.
Cooling Gel Pack - Venous Leg Ulcer
Serious: 4/42 (10%)
Deaths: 1/42
Cooling Cotton Pack - Venous Leg Ulcer
Serious: 2/40 (5%)
Deaths: 0/40
Cooling Gel Pack - Diabetic Foot Ulcer
Serious: 3/29 (10%)
Deaths: 0/29
Cooling Cotton Pack - Diabetic Foot Ulcer
Serious: 4/29 (14%)
Deaths: 0/29
Serious adverse events (7 terms)
Reaction
System
Cooling Gel Pack - Venous …
Cooling Cotton Pack - Veno…
Cooling Gel Pack - Diabeti…
Cooling Cotton Pack - Diab…
Heart attack or failure
Cardiac disorders
—
—
—
—
Shortness of breath
Respiratory, thoracic and mediastinal disorders
—
—
—
—
Amputation
Vascular disorders
—
—
—
—
Stroke
Vascular disorders
—
—
—
—
Infection
Infections and infestations
—
—
—
—
Fainted
Ear and labyrinth disorders
—
—
—
—
Renal cancer
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
The goal of this study is to test MUSTCOOL, a home-based self-monitoring and self-management ulcer prevention intervention for patients with newly healed chronic venous leg and diabetic foot ulcers. Almost 90% of ulcers recur within 3 months of healing. During the six-month randomized clinic trial, skin temperature will be monitored daily, a maintenance dose of cooling gel pack or placebo will be applied three times weekly to the affected skin, and a bolus dose of cooling will be applied for 5 consecutive days if skin temperature becomes elevated. Outcomes on the incidence of leg ulcer recurrence, pain, physical activity and quality of life will be measured.
Publications & conference data
2 peer-reviewed publications reference this trial (live from Europe PMC):
NCT06491264 — Multiparameter Optimized tES for Memory in Aging
· NA
· withdrawn
NCT07513389 — Omission of Postoperative Radiation in HPV-Associated Oropharyngeal Cancer Using ctHPVDNA Surveillance (OPERATION)
· Phase 2
· not yet recruiting
NCT03101917 — Microtable® Method for Cochlear Implantation Investigational Device Exemption (IDE)
· NA
· not yet recruiting
NCT07149207 — Intraoperative Molecular Imaging Using ICG for Head and Neck Tumors
· Phase 2
· recruiting
NCT06148038 — CBD for Breast Cancer Primary Tumors
· Phase 1
· recruiting
Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by Medical University of South Carolina
Last refreshed: 30 June 2021
Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT02626156.