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not enough staff to execute study
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This study is designed as a pilot study where 30 patients receiving a below the knee amputation with at least one open wound on the limb will be enrolled. Patients are identified through medical records. The patients will be selected based on inclusion and exclusion criteria through pre-screening through the Comprehensive Wound Center's Limb Preservation Program and wound physicians/providers at Indiana University. The decision of amputation is made independently of the study and is solely made by the patient and their physician/provider. The provider decides based on the severity of the limb's condition if/when the limb should be amputated and will schedule this surgery with the patient based on current clinical standard of care. Study participation is decided independent of clinical decision. Patients enrolled in the study will wear the Patterned Electric Dressing (PED) on the wound(s) for up to 3 weeks or until amputation, whichever comes first and will have up to a total of 4 study visits.
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| No Interventions | Other | No Interventions |
| Measure | Description | Time Frame |
|---|---|---|
| Bacterial colonization & culture | Bacteria colonization (cultures results high, moderate, low or negative). | 3 weeks or until amputation, whichever comes first |
| Necrotic tissue assessed through light microscopy of tissue biopsies | Hematoxylin and Eosin staining of tissue sections to measure extent of tissue necrosis at baseline and compared to tissue obtained at surgery after PED treatment.% necrotic tissue will be measured. | 3 weeks or until amputation, whichever comes first |
| Measure | Description | Time Frame |
|---|---|---|
| Wound area measured before and after wound treatment | To determine the effect of PED on % wound closure based on wound measurements at baseline and end of PED treatment. | 3 weeks or until amputation, whichever comes first |
| Bacterial biofilm through Scanning Electron Microscopy analysis |
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Inclusion Criteria:
Ages 18 years and older
Patients identified to be receiving a non-traumatic below the knee amputation within 3 weeks of enrollment
The affected limb to be amputated must have at least one open wound
Subjects willing and able to provide informed consent
Exclusion Criteria:
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In this study 30 patients receiving a below the knee amputation with at least one open wound on the limb will be enrolled. Patients are identified through medical records. The patients will be selected based on inclusion and exclusion criteria through pre-screening through the Comprehensive Wound Center's Limb Preservation Program and wound physicians/providers at Indiana University. Patients enrolled in the study will wear the Patterned Electric Dressing (PED) on the wound(s) for up to 3 weeks or until amputation, whichever comes first and will have up to a total of 4 study visits.
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| Name | Affiliation | Role |
|---|---|---|
| Gordillo Gayle, MD | Indiana University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| IU Health Methodist Hospital | Indianapolis | Indiana | 46202 | United States |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 21457463 | Background | Ammons MC, Ward LS, James GA. Anti-biofilm efficacy of a lactoferrin/xylitol wound hydrogel used in combination with silver wound dressings. Int Wound J. 2011 Jun;8(3):268-73. doi: 10.1111/j.1742-481X.2011.00781.x. Epub 2011 Apr 1. | |
| 10334980 | Background | Costerton JW, Stewart PS, Greenberg EP. Bacterial biofilms: a common cause of persistent infections. Science. 1999 May 21;284(5418):1318-22. doi: 10.1126/science.284.5418.1318. |
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wound debrided tissue and tissue biopsy sample
Perform scanning electron microscopy to detect bacterial biofilm (high, moderate, low or negative) before and after PED treatment. |
| 3 weeks or until amputation, whichever comes first |
| Bacterial contamination assessed through Colony Forming Units | Colony forming units will be measured from tissue samples and dressings to quantitate bacterial contamination levels at baseline and after PED treatment. | 3 weeks or until amputation, whichever comes first |
| 12825991 | Background | Douglas LJ. Medical importance of biofilms in Candida infections. Rev Iberoam Micol. 2002 Sep;19(3):139-43. |
| 12665817 | Background | Schachter B. Slimy business--the biotechnology of biofilms. Nat Biotechnol. 2003 Apr;21(4):361-5. doi: 10.1038/nbt0403-361. No abstract available. |