The investigators will test the efficacy of the novel oxygen diffusion dressing allows delivery tissue oxygenation via TransCu O2® Oxygen Delivery System for use in caring for patients with surgically closed wounds.

The investigators hypothesize that using this novel oxygen diffusion dressing will reduce the likelihood of necrotic tissue as well as severe incisional scar post-surgical closure by improving transcutaneous oxygen levels during wound healing process. TransCu O2 Oxygen Delivery System is a novel wound healing therapy that promises to enhance tissue hydration, which in turn may lead to quick epithelialization essential to reduce the likelihood of formation of necrotic tissue and excessive scars.

Surgical wound (e.g., post minor amputation, reconstruction surgery, or surgical incision) complications such as infection, dehiscence, necrotic tissue, surgical revision, and poor cosmesis are unfortunately highly prevalent in patients undergoing surgical interventions. In most cases surgical wounds are managed with a simple island dressing, orthopaedic wool padding and a light retention bandage. It could be argued that such low cost, traditional dressings are adequate for most surgical wounds. However, some patients with poor tissue integrity often require modern wound care products that offer additional benefits, in particular among those with vascular and poor tissue oxygenation problem. Poor tissue oxygenation and poor skin perfusion could lead to surgical wound complications such as wound infection, tissue necrosis, phantom pain, trauma and untimely surgical revision as well as major amputation.

In particular, the presence of non-viable, necrotic tissue (estimated to occur in 15-25% of cases) is significant as it can be responsible for delaying healing, prolonging the inflammatory response, mechanically obstructing contraction and impeding re-epithelialisation. It also provides a focus for wound infection and surgical revision.

The problem associated with necrotic tissue is not limited to limb amputation and could be seen in other surgical closures leading to excessive scar formation. Many of these scars can be problematic, being aesthetically unpleasant and causing discomfort. Blood supply is a significant factor in wound healing, and an area of the skin with rich supply of vasculature is known to heal to finer scars. Several studies have demonstrated that mild hypoxia (lack of transcutaneous oxygen) is present in early scars, moderate hypoxia in proliferative scars, and severe hypoxia in regressive scars. Oxygen levels then return to normal in mature scars, which is consistent along with the dynamic change in microvessel density. Therefore level of transcutaneous oxygen could be a determinant factor in formation of excessive scar formation.

Dressing materials are known to influence postoperative surgical wound healing and scar formation. A particular dressing that could promote wound hydration is key to ensure quick epithelialization and decrease excessive scar formation. The current standard of care in wound healing is to promote a moist wound environment by regular changing dressing and hydrate wound when needed. Some new advanced dressing and products have been also suggested with promising results in reducing excessive scar formation such as the use of silicone sheeting, hydrogel wound dressing, etc.

In this study, the investigators hypothesize that using novel oxygen diffusion dressing allows delivery tissue oxygenation via TransCu O2® Oxygen Delivery System will reduce the likelihood of necrotic tissue as well as severe incisional scar post-surgical closure by improving transcutaneous oxygen levels during wound healing process. TransCu O2 Oxygen Delivery System is a novel wound healing therapy that promises to enhance tissue hydration, which in turn may lead to quick epithelialization essential to reduce the likelihood of formation of necrotic tissue and excessive scars.

Inclusion Criteria:

• 18-85 years of age. Ability to provide informed consent.
• Presence of a wound due to surgical intervention and closure.
• Subject or responsible caregiver is willing and able to maintain the required offloading (as applicable for the location of the wound) and applicable dressing changes

Exclusion Criteria:

• Charcot Arthropathy Bilateral AK/BK amputation Active Drug/alcohol abuse (or history of drug/alcohol abuse in last 1 month) Dementia or impaired cognitive function Subjects with osteomyelitis or extreme gangrene. Excessive lymphedema Presence of active infection Subject has a history of or any intercurrent illnesses or conditions that would compromise the safety of the subject according to judgement of a qualified wound specialist.

AEs were collected from study start date to the study completion date in a non-systematic way. Per patient, AEs were collected up to 4 weeks after baseline. During follow-ups, participants were asked if they experienced AEs. If participant missed a visit or had low adherence the coordinator called the participant and asked for AEs. AEs were also reported by the participants on a case-by-case basis when they occurred.

The clinicaltrials.gov definitions were used. We collected unfavorable medical occurrences experienced by study participants and noted whether they were study device related (caused directly by the device), unrelated to the study device, or whether it was caused by improper device usage. This information was collected non-systematically and not separately -- either participants reported events directly or during phone calls/study visits study coordinators asked about issues.