CClinicalTrials.gg
CompletedNCT04019392Updated Feb 26, 2020

Rate of Tissue Temperature Reduction Between Wetted Ice and Game Ready

An interventional study of Game Ready® device and Wetted Ice Bag with Elastic Wrap in Cryotherapy Effect, sponsored by North Dakota State University. Completed at 1 site in United States. Open to participants aged 18 Years to 40 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2020-02-26.

Sponsored by North Dakota State University · Not applicable, Interventional, and Prevention

From the registry’s dates

  • Primary completion was Oct 2019, 6 years 11 months ago, and no results have been posted to the registry.
Phase
Not applicable
Study type
Interventional
Enrollment
20
Allocation
Randomized
Ages
18 Years to 40 Years
Sex
All
01

Study summary

This study compares the tissue temperature decrease between a wetted ice bag (ice and water) with an elastic wrap to the Game Ready® treatment. The goal is to determine which one decreases the temperature the most and the fastest, which is important in immediate care treatments of a musculoskeletal injury.

Read the detailed description

The purpose of this study will be to determine which cryotherapy method, wetted ice bag and elastic wrap or Game Ready® set at medium pressure, decreases tissue temperature the most during a 30-minute treatment. Due to the convenience of Game Ready®, it is being used as an immediate care intervention. Findings in the literature have indicated wetted ice cools tissue temperature more than cubed or crushed ice based on the assumption that colder is better. Conversely, research on Game Ready® has revealed ice bags and slush buckets cause a greater reduction in tissue temperature compared to Game Ready®. However, no study exists comparing the effects of Game Ready® versus wetted ice on intramuscular tissue temperature reduction as immediate care interventions. Based on the results, this study may help contribute to the existing literature on tissue temperature reduction of both Game Ready® and wetted ice to determine the better modality to use for immediate care. The research questions guiding this study will be:

  1. Which cryotherapy method, Game Ready® or wetted ice with elastic wrap, will be the most effective at decreasing intramuscular tissue temperature during a 30-minute application in patients aged 18-40 years old?
  2. Which cryotherapy method, Game Ready® or wetted ice with elastic wrap, will achieve an intramuscular tissue temperature reduction the fastest?
02

Conditions studied

  • Cryotherapy Effect

Keywords

  • cooling rates
03

In context

Lead sponsor

North Dakota State University is the lead sponsor of 21 studies on the registry; none are open to participants now.

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

04

Who can participate

Ages eligible
18 Years to 40 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Subjects will be both male and female.
  • Subjects will be between 18 and 40 years of age.
  • Subjects will have no prior injury to the dominant lower leg within the past 6 months.
  • Subjects will be able to speak English.
  • Subjects will have less than 1 cm of adipose over the medial gastrocnemius muscle.

Exclusion criteria

Exclusion Criteria:

  • any current lower extremity injury, or any lower extremity injuries within the past 6 months.
  • any previous history of surgery in the lower leg
  • any contraindications to cryotherapy such as Raynaud's phenomenon, cold-induced urticaria, previous frostbite to the lower leg, open wounds, peripheral vascular disease, lupus, circulatory insufficiency, mayocardial ischemia, or skin infections.
  • any abnormalities seen in the muscle as determined by diagnostic ultrasound.
  • any allergies or sensitivities to Betadine.
  • greater than 1.0cm of adipose over the medial gastrocnemius muscle (calf).
05

Study design

Phase
Not applicable
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Crossover assignment
Masking
None (open label)
Enrollment
20 participants (actual)

Study arms

  • Active comparator
    Wetted ice with elastic wrap

    A standard ice bag filled with 2000 mL of cubed ice and 300 mL of 5˚C water will be applied to each participants' lower leg for 30 minutes using an elastic wrap. The elastic wrap will be applied at approximately 75% percent tension starting distal to the treatment area and moving proximally overlapping by half. The elastic wrap application will consist of pulling the wrap to its full tension, measuring the length of the wrap, and calculating 75% of the total length to apply to the body part.

    Device: Game Ready® device

  • Active comparator
    Game Ready

    The half leg boot sleeve of the Game Ready® device (CoolSystems, Inc., Alamda, CA) will be applied to each participants' lower leg and ankle for 30 minutes set on the medium pressure setting (5-50 mmHG).

    Other: Wetted Ice Bag with Elastic Wrap

Interventions

  • DeviceGame Ready® device

    The half leg boot sleeve of the Game Ready® device (CoolSystems, Inc., Alamda, CA) will be applied to each participants' lower leg and ankle for 30 minutes set on the medium pressure setting (5-50 mmHG).

  • OtherWetted Ice Bag with Elastic Wrap

    A standard ice bag filled with 2000 mL of cubed ice and 300 mL of 5˚C water will be applied using an elastic wrap to each participants' lower leg for 30 minutes. An elastic wrap applied at approximately 75% percent tension starting distal to the treatment area and moving proximally overlapping by half will be applied over the wetted ice bag.

06

What researchers measure

Primary outcomes

  1. Intramuscular temperature

    The triceps surae intramuscular tissue temperature will be recorded with thermocouples inserted 2cm below the adipose.

    Time frame: The tissue temperatures will be recorded every 5 seconds and analyzed at the baseline.

  2. Intramuscular temperature

    The triceps surae intramuscular tissue temperature will be recorded with thermocouples inserted 2cm below the adipose.

    Time frame: The tissue temperatures will be recorded every 5 seconds and analyzed at 10 minutes.

  3. Intramuscular temperature

    The triceps surae intramuscular tissue temperature will be recorded with thermocouples inserted 2cm below the adipose.

    Time frame: The tissue temperatures will be recorded every 5 seconds and analyzed at 20 minutes.

  4. Intramuscular temperature

    The triceps surae intramuscular tissue temperature will be recorded with thermocouples inserted 2cm below the adipose.

    Time frame: The tissue temperatures will be recorded every 5 seconds and analyzed at 30 minutes/end time.

07

Study locations

1 site
  • North Dakota State University
    Fargo, North Dakota 58108-6050, United States
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 26, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04019392
Lead sponsor
North Dakota State University
Responsible party
Kara Gange (Associate Professor, North Dakota State University) — Principal investigator
First posted
Jul 15, 2019
Start date
Sep 27, 2019
Primary completion
Oct 15, 2019
Completion
Feb 2, 2020
Last update
Feb 26, 2020

Study contacts

Kara Gange, PhD, ATC
principal investigator · Kara Gange

Oversight

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

Not currently enrolling

This study is completed, as verified in Feb 2020. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion