Surgical Wounds
Conditions
Brief summary
Currently, standard wound care practice is suboptimal at assessing wound remodeling and bacterial infection in real-time. An alternative and complimentary means of providing real-time imaging of connective tissue re-modeling and bacterial infection may greatly increase the early detection of infection thus leading to rapid therapeutic intervention. Our new device, PRODIGI(TM), images tissue and bacterial autofluorescence (without agents) and may provide this clinically-important capability. In preliminary preclinical testing, the investigators have discovered that when wounds are illuminated by violet/blue light, endogenous collagen in the connective tissue matrix emit a characteristic green fluorescent signal, while most pathogenic bacterial species emit a unique red fluorescence signal due to the production of endogenous porphyrins. Therefore, with autofluorescence imaging, no exogenous contrast agents are needed during imaging, making this approach particularly appealing as a diagnostic imaging method for clinical use. The investigators hypothesize that real-time imaging of tissue autofluorescence signals emanating from endogenous connective tissue (e.g. collagen) and pathogenic bacteria within complex wounds can be used to determine healing status (i.e., collagen re-modeling and wound closure), detect wound bacterial contamination and/or infection that is occult under standard clinical white light evaluation, and guide intervention and wound care.
Interventions
None listed
Sponsors
Cancer Care Ontario
University Health Network, Toronto
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
1. \> 18 years of age 2. males and females 3. receiving care as in-patient at St. Michael's Hospital 4. presenting with abdominal wounds resulting from general surgery with known or unknown infection status.
Exclusion criteria
1. treatment with an investigational drug within 1 month before study enrolment 2. any contra-indication to routine wound care and/or monitoring 3. inability to consent
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| providing wound healing status in real time based on collagen fluorescence as an indicator of wound closure | Upon study completion |
Secondary
| Measure | Time frame |
|---|---|
| detecting bacterial contamination and infection in wounds that is occult to conventional wound assessment methods (white light visualization and clinical signs and symptoms of wound infection) | Upon study completion |
| the ability of the device to provide real-time fluorescence image-guided targeting of swabbing for bacteriology testing | Upon study completion |
| utility of PRODIGI™ in guiding intervention | Upon study completion |
Countries
Canada
Outcome results
None listed