Pre-operative Aqueous Antiseptic Skin Solutions in Open Fractures (Aqueous-PREP)
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ClinicalTrials.gov Identifier: NCT03385304 |
Recruitment Status :
Completed
First Posted : December 28, 2017
Results First Posted : March 31, 2023
Last Update Posted : March 31, 2023
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Condition or disease | Intervention/treatment | Phase |
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Surgical Site Infection Unplanned Fracture-Related Reoperation Open Appendicular Fracture | Drug: 10% povidone-iodine (1% free iodine) in purified water Drug: 4% chlorhexidine gluconate (CHG) in purified water | Phase 4 |
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 1638 participants |
Allocation: | Randomized |
Intervention Model: | Crossover Assignment |
Intervention Model Description: | Treatment allocation will be determined using a cluster-randomized crossover trial design. The order of treatment allocation for each orthopaedic practice will be randomly assigned using a computer generated randomization table. Each site will start with the initially allocated study solution and eventually crossover to the other solution for their second recruitment period. This process of alternating treatments will repeat approximately every 2 months as dictated by the initial randomization. |
Masking: | Single (Outcomes Assessor) |
Masking Description: | The orthopaedic team (including the study coordinators) cannot be blinded to the treatment allocation as the antiseptic solutions are visually distinguishable and these individuals need to lead the implementation of the cluster-crossover protocol at their clinical site. The Adjudication Committee Members and data analysts will be blinded to the study treatment. All interpretation of study results will initially be done in a blinded manner by developing two interpretations of the results. One interpretation will assume treatment A is povidone-iodine, the other interpretation will assume it is CHG. Once the data interpretations for each assumption are finalized, the data will be unblinded and the correct interpretation will be accepted. |
Primary Purpose: | Treatment |
Official Title: | Aqueous-PREP: A Pragmatic Randomized Trial Evaluating Pre-operative Aqueous Antiseptic Skin Solutions in Open Fractures |
Actual Study Start Date : | April 8, 2018 |
Actual Primary Completion Date : | October 19, 2021 |
Actual Study Completion Date : | June 27, 2022 |

Arm | Intervention/treatment |
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Experimental: 10% povidone-iodine (1% free iodine) in purified water
The povidone-iodine solution will contain 10% povidone-iodine (1% free iodine) in purified water as the only active ingredient. Operating room personnel will apply the solution to the operative site as the final preoperative skin antisepsis preparation immediately prior to commencing surgical fixation. They will apply the solution as per manufacturer's directions for use (e.g., technique of application, duration of application, drying time, drying techniques, replacement of draping, etc.).
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Drug: 10% povidone-iodine (1% free iodine) in purified water
Participant recruitment will begin with the clinical sites using their assigned pre-operative antiseptic skin solution for all open fracture surgeries for a two-month period. Drug: 4% chlorhexidine gluconate (CHG) in purified water Once the first intervention phase is completed, each site will crossover to the opposite study solution. Each site will need to develop local procedures to ensure a successful crossover. They will use the second solution for all open fracture surgeries for a two-month period, and will then crossover back to the solution in the first intervention phase. |
Experimental: 4% chlorhexidine gluconate (CHG) in purified water
The CHG solution will contain 4% CHG in purified water as the only active ingredient. Operating room personnel will apply the solution to the operative site as the final preoperative skin antisepsis preparation immediately prior to commencing surgical fixation. They will apply the solution as per manufacturer's directions (e.g., technique of application, duration of application, drying time, replacement of draping, etc.).
|
Drug: 10% povidone-iodine (1% free iodine) in purified water
Participant recruitment will begin with the clinical sites using their assigned pre-operative antiseptic skin solution for all open fracture surgeries for a two-month period. Drug: 4% chlorhexidine gluconate (CHG) in purified water Once the first intervention phase is completed, each site will crossover to the opposite study solution. Each site will need to develop local procedures to ensure a successful crossover. They will use the second solution for all open fracture surgeries for a two-month period, and will then crossover back to the solution in the first intervention phase. |
- Number of Participants With a Superficial Incisional Surgical Site Infection (SSI) [ Time Frame: Within 30 days of the patient's last planned fracture management surgery ]
Guided by the Centers for Disease Control and Prevention (CDC) National Healthcare Safety Network reporting criteria (2017):
Date of event for infection may occur from the date of fracture to 30 days after the definitive fracture management surgery; AND involves only skin and subcutaneous tissue of the incision; AND patient has at least one of the following:
- purulent drainage from the superficial incision.
- organisms identified from an aseptically obtained specimen from the superficial incision or subcutaneous tissue by a culture or non-culture based microbiologic testing method which is performed for purposes of clinical diagnosis or treatment
- superficial incision that is deliberately opened by a surgeon, and culture or non-culture-based testing is not performed. AND patient has at least one of the following signs or symptoms: pain or tenderness; localized swelling; erythema; or heat.
- diagnosis of a superficial incisional SSI by the surgeon.
- Number of Participants With a Deep Incisional or Organ/Space Infection [ Time Frame: Within 90 days of the patient's last planned fracture management surgery ]
Guided by CDC's National Healthcare Safety Network Surgical Site Infection reporting criteria (2017):
Deep Incisional Infection:
Occurs within 90 days post definitive fracture management; & involves fascial/muscle layers; & has at least one of the following:
- deep incision purulent drainage
- a deep incision that dehisces, or is opened by a surgeon, and organism is identified by microbiologic testing; or microbiologic testing is not performed & has at least one of the following: fever (> 38 °C); localized pain or tenderness
- other evidence of deep incision infection on anatomical exam or imaging test
Organ/Space Infection:
Occurs within 90 days post definitive fracture management; & involves any part of the body deeper than the fascial/muscle layers; & has at least one of the following:
- organ/space purulent drainage
- organisms in organ/space identified by microbiologic testing
- other evidence of organ/space infection on anatomical exam or imaging test
- Number of Participants With an Unplanned Fracture-Related Reoperation [ Time Frame: Within 12 months of the patient's last planned operation ]Common examples include any unplanned fracture-related surgery that is associated with an infection at the operative site or contiguous to it, a wound-healing problem, or a fracture delayed union or non-union.

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Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
The inclusion criteria are:
- Patients 18 years of age or older.
- Open fracture of the appendicular skeleton.
- Received or will receive definitive fracture treatment with a surgical implant(s) (e.g., internal fixation, external fixation, joint prosthesis, etc.).
- Open fracture wound management that includes formal surgical debridement within 72 hours of their injury.
- Will have all planned fracture care surgeries performed by a participating surgeon or delegate.
- Informed consent obtained.
- Patient enrolled within 3 weeks of their fracture.
The exclusion criteria are:
- Patients that did not or will not receive the allocated pre-operative surgical preparation solution due to a medical contraindication.
- Received previous surgical debridement or management of their open fracture at a non-participating hospital or clinic.
- Open fracture managed outside of the participating orthopaedic service (e.g., hand fracture managed by plastic surgeon).
- Chronic or acute infection at or near the fracture site at the time of initial fracture surgery.
- Burns at the fracture site.
- Incarceration.
- Expected injury survival of less than 90 days.
- Terminal illness with expected survival less than 90 days.
- Previous enrollment in a PREP-IT trial.
- Currently enrolled in a study that does not permit co-enrollment.
- Unable to obtain informed consent due to language barriers.
- Likely problems, in the judgment of study personnel, with maintaining follow-up with the patient.
- Excluded due to sampling strategy.

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 ClinicalTrials.gov identifier (NCT number): NCT03385304
United States, Arizona | |
The CORE Institute / Banner University Medical Center | |
Phoenix, Arizona, United States, 85006 | |
Banner - University Medical Center Tucson | |
Tucson, Arizona, United States, 85721 | |
United States, California | |
University of California San Francisco | |
San Francisco, California, United States, 94143 | |
United States, Florida | |
University of Florida | |
Gainesville, Florida, United States, 32611 | |
United States, Indiana | |
Indiana University Health Methodist Hospital | |
Indianapolis, Indiana, United States, 46202 | |
United States, Maryland | |
University of Maryland, R Adams Cowley Shock Trauma Center | |
Baltimore, Maryland, United States, 21201 | |
United States, Ohio | |
Wright State University / Miami Valley Hospital | |
Dayton, Ohio, United States, 45409 | |
United States, South Carolina | |
Greenville Health System | |
Greenville, South Carolina, United States, 29605 | |
United States, Tennessee | |
Vanderbilt University | |
Nashville, Tennessee, United States, 37240 | |
United States, Texas | |
San Antonio Military Medical Center | |
Fort Sam Houston, Texas, United States, 78234 | |
McGovern Medical School at University of Texas Health Science Center Houston | |
Houston, Texas, United States, 77030 | |
Canada, Ontario | |
Hamilton Health Sciences | |
Hamilton, Ontario, Canada, L8L 2X2 | |
McMaster University, Center for Evidence-Based Orthopaedics | |
Hamilton, Ontario, Canada, L8L 8E7 | |
Spain | |
Hospital Parc Tauli de Sabadell | |
Barcelona, Spain | |
Vall d'Hebron University Hospital | |
Barcelona, Spain |
Principal Investigator: | Gerard Slobogean, MD | University of Maryland Shock Trauma Center | |
Principal Investigator: | Sheila Sprague, PhD | McMaster University | |
Principal Investigator: | Mohit Bhandari, MD | McMaster University |
Documents provided by Gerard Slobogean, University of Maryland, Baltimore:
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: | Gerard Slobogean, Assistant Professor, Department of Orthopaedics, University of Maryland, Baltimore |
ClinicalTrials.gov Identifier: | NCT03385304 |
Other Study ID Numbers: |
HP-00078470 |
First Posted: | December 28, 2017 Key Record Dates |
Results First Posted: | March 31, 2023 |
Last Update Posted: | March 31, 2023 |
Last Verified: | March 2023 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Product Manufactured in and Exported from the U.S.: | Yes |
Surgical Site Infection Open Fracture Povidone-iodine Chlorhexidine gluconate Peri-operative Preparation Solutions |
Surgical Wound Infection Fractures, Bone Fractures, Open Infections Wounds and Injuries Wound Infection Postoperative Complications Pathologic Processes Iodine Chlorhexidine Chlorhexidine gluconate |
Povidone-Iodine Povidone Anti-Infective Agents, Local Anti-Infective Agents Disinfectants Dermatologic Agents Trace Elements Micronutrients Physiological Effects of Drugs Plasma Substitutes Blood Substitutes |