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Feasibility Study of Cryotherapy for Chronic Venous Disorders (Cryo)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00617825
Recruitment Status : Completed
First Posted : February 18, 2008
Last Update Posted : June 15, 2018
Information provided by:
Medical University of South Carolina

Brief Summary:
Severe skin damage caused by chronic venous disorders (CVDs) results in relentless pain and poor quality of life for millions of adults in the U.S. each year. DVDs are under-recognized and under-treated disorders shat harm the veins of the legs and at worst, cause skin inflammation and venous leg ulcers. A new way to ease the pain and inflammation is proposed in this study of cryotherapy (cool gel wraps) applied to damaged skin of the lower legs of CVD-affected individuals. The study hypothesis predicts that this novel cryotherapy model and method will significantly improve the health and quality of life for those with CVDs and that the intervention will become a standard of care for CVDs. In addition, the method will, over time, reduce health care costs associated with treating poor CVD outcomes.

Condition or disease Intervention/treatment Phase
Venous Insufficiency Other: cyrotherapy as a cool gel wrap Not Applicable

Detailed Description:

Chronic venous disorders (CVDs) often cause long-term disability for those who experience the worst manifestations of CVDs: disabling pain and non-healing leg ulcers. Such disabilities have significant socioeconomic implications in terms of lost work days and wages, decreased productivity,and ultimately increased health care costs that deteriorate the well-being and quality of life for those who have CVD-induced illnesses. Because no reliable preventive mechanisms exists for CVDs, this study proposes a preventive, self-management cryotherapy intervention that targets inflamed skin of populations with CVDs at highest risk of developing chronic leg ulcers. The proposed cryotherapy intervention will utilize a randomized controlled clinical trial to develop a method to reduce clinical symptoms by improving existing therapy - it is not a treatment for CVDs itself. In the proposed pilot feasibility study, subjects will be randomized to two groups; the cryotherapy intervention group (n=30) who will receive a four-week, cryotherapy gel wrap applied daily to the affected skin of the lower legs in addition to the standard of care (usual care). The control group (n=30) will receive the usual care of compression wraps or stockings applied to the lower legs and daily leg elevation. With this method, improvement of skin microcirculation, reduced leg pain, and improvement in quality of life will be observed. The following aims will test the hypothesis:

Aim 1: Evaluate the feasibility of the novel intervention including treatment fidelity, subject training, safety, and side effects associated with equipment and recruitment efforts and further refine the intervention protocol, including questionnaires used in our previous studies.

Aim 2: Estimate variability of outcome measurements and effect sizes needed to calculate sample size for a subsequent larger, adequately powered, randomized clinical trial of the efficacy of the novel cryotherapy intervention.

Aim 3: Investigate the presence of a preliminary "signal" of clinical efficacy of the experimental treatment by evaluating trends toward statistical significance for the hypothesis that the experimental group will experience greater reduction in skin temperature and blood flow, greater improvement in pain, and greater improvement in quality of life.

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Study Type : Interventional  (Clinical Trial)
Enrollment : 60 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Cryotherapy for Chronic Venous Disorders
Study Start Date : September 2007
Actual Primary Completion Date : June 2009
Actual Study Completion Date : August 2009

Intervention Details:
  • Other: cyrotherapy as a cool gel wrap
    A cool gel wrap made of a hydrogel with silicon will be applied to the lower leg of skin affected by venous disorders for 30 minutes each day for 30 days during the study
    Other Name: Elastogel Therapy Wrap

Primary Outcome Measures :
  1. improvement of skin microcirculation [ Time Frame: 30 days ]

Secondary Outcome Measures :
  1. leg pain [ Time Frame: 30 days ]
  2. quality of life [ Time Frame: 30 days ]

Information from the National Library of Medicine

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Ages Eligible for Study:   45 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Aged 45 years and older
  • CEAP classification: stage C4 (changes in skin and subcutaneous tissue secondary to CVDs)4a (pigmentation or eczema) 4b (lipodermatosclerosis or atrophie blanche) C5 (healed venous ulcers)
  • Ankle brachial index (ABI) 0.9 - 1.3mm Hg 0 absence of peripheral arterial disease
  • Intact skin sensation measured with 10 gram monofilament
  • Intact thermal sensation measured with thermal sensory tester at lower leg skin and foot surfaces
  • Agreement to wear compression garments such as wraps or stockings during waking hours
  • Phone, e-mail, or mail accessible
  • Working freezer

Exclusion Criteria:

  • ABI < 0.8 mm Hg or > 1.3 mm Hg -presence of lower extremity arterial disease (reduces skin temperature)
  • Active systemic or localized infections such as cellulitis (raises skin temperature)
  • Autoimmune disorders that reduce blood flow such as Raynaud's phenomenon
  • Body temperature > 37.6 degrees C (febrile state raises skin temperature)
  • CEAP classification c6: active venous ulcer (cooling ulcerated skin might impair healing)
  • Known peroneal nerve injury
  • Impaired skin sensation
  • Unable to detect light touch measured with a 10 gram monofilament at lower leg skin surfaces
  • Unable to detect not/cold sensation measured with thermal sensory tester at lower leg skin surfaces
  • Not wearing compression or not agreeing to wear compression wraps or stockings
  • Phone, e-mail, or mail inaccessible
  • No working freezer

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00617825

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United States, South Carolina
Medical University of South Carolina
Charleston, South Carolina, United States, 29425-1600
Sponsors and Collaborators
Medical University of South Carolina
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Principal Investigator: Teresa J Kelechi, PhD, RN Medical University of South Carolina

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Responsible Party: Teresa J. Kelechi, PhD, RN, Medical University of South Carolina Identifier: NCT00617825    
Other Study ID Numbers: 17504
1R21NR010604-01 ( U.S. NIH Grant/Contract )
First Posted: February 18, 2008    Key Record Dates
Last Update Posted: June 15, 2018
Last Verified: September 2007
Keywords provided by Medical University of South Carolina:
chronic venous disorders
skin microcirculation
skin temperature
Additional relevant MeSH terms:
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Venous Insufficiency
Vascular Diseases
Cardiovascular Diseases