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Interpretation of the DermaLab Combo® pigmentation and vascularity measurements in burn scar assessment: an exploratory analysis.
Gankande, T U; Duke, J M; Wood, F M; Wallace, H J.
Affiliation
  • Gankande TU; Burn Injury Research Unit, Burn Injury Research Unit, School of Surgery, M318, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia. Electronic address: Uliya.Gankande@uwa.edu.au.
  • Duke JM; Burn Injury Research Unit, School of Surgery, The University of Western Australia, Australia.
  • Wood FM; Burn Injury Research Unit, School of Surgery, The University of Western Australia, Australia; Burn Outcomes Centre, Royal Perth Hospital, Australia.
  • Wallace HJ; Burn Injury Research Unit, School of Surgery, The University of Western Australia, Australia.
Burns ; 41(6): 1176-85, 2015 Sep.
Article in En | MEDLINE | ID: mdl-25703660
ABSTRACT

BACKGROUND:

The DermaLab Combo® measures pigmentation and vascularity of a burn scar more reliably than the modified Vancouver Scar Scale (mVSS). This study aims to examine how the DermaLab Combo® continuous measurements of pigmentation and vascularity of burns scars relate to the mVSS, a standard clinical scar assessment method; and secondly, to obtain evidence to support the concurrent validity of DermaLab Combo® measurements for pigmentation and vascularity.

METHOD:

Scar assessments were performed on an index burn scar of 100 subjects using two

methods:

the mVSS (two raters) and the DermaLab Combo® device (one rater). Using the DermaLab Combo®, measurements of pigmentation and vascularity for the index scar and an adjacent normal skin site were obtained. Indices were generated to represent the scar pigmentation (melanin index, MI%) and scar vascularity (erythema index, EI%) relative to the patient's matched normal skin. Exploratory univariate and bivariate analyses were conducted and the concordance of classification by mVSS score using DermaLab® cut-off values was assessed.

RESULTS:

For pigmentation, the results suggest a 80% classification concordance for the DermaLab Combo® MI% values into mVSS pigmentation categories (hypopigmentation, normal pigmentation and hyperpigmentation) using two predictors (MI% and EI%) and visually fitted discriminant axis cut-offs. Due to the high degree of overlap of EI% values between the vascularity categories, meaningful classification of EI% values using the mVSS was not possible.

CONCLUSION:

Quantifying percentage changes in melanin and erythema relative to matched normal skin improved understanding of the DermaLab Combo® pigmentation and vascularity measurements. The DermaLab Combo® pigmentation MI% values were able to be classified into pigmentation categories of the mVSS, and pigmentation classification concordance was further improved with consideration of the scar's DermaLab Combo® vascularity EI% values. The DermaLab Combo® is an objective tool; however, while the measurement provides continuous numerical data that may be useful for identifying change over time in clinical scar monitoring of pigmentation and vascularity, further work will be useful to understand the DermaLab Combo® measurements to optimise the interpretation of these data.
Subject(s)
Key words

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Burns / Cicatrix / Hypopigmentation / Hyperpigmentation / Erythema / Neovascularization, Pathologic Type of study: Prognostic_studies Limits: Adolescent / Adult / Aged / Female / Humans / Male / Middle aged Language: En Journal: Burns Journal subject: TRAUMATOLOGIA Year: 2015 Type: Article

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Burns / Cicatrix / Hypopigmentation / Hyperpigmentation / Erythema / Neovascularization, Pathologic Type of study: Prognostic_studies Limits: Adolescent / Adult / Aged / Female / Humans / Male / Middle aged Language: En Journal: Burns Journal subject: TRAUMATOLOGIA Year: 2015 Type: Article