Quantifying the Degree of Bruise Visibility Observed Under White Light and an Alternate Light Source

Visibility of inflicted bruises by alternate light: Results of a randomized controlled trial

Difficulty visualizing bruises resulting from interpersonal violence, especially in individuals with dark skin, contributes to disparities in access to justice. The purpose of this analysis was to compare bruise visibility of detected injuries using white light versus alternate light sources (ALS). Visibility was assessed using the 5-point Bruise Visibility Scale (BVS) for white light and the ALS Visibility Scale (AVS) for ALS. Bruises were induced using controlled application of a paintball to the upper arm on 157 healthy adults across six skin color categories. Using a crossover design, the light source used first to assess the bruise (white light or ALS) was randomized. Each bruise was examined up to 21 times over 4 weeks using white light and 10 combinations of wavelengths (350 nanometer [nm] - 535 nm) and colored filters (yellow, orange, and red). Multilevel modeling was used to analyze the repeated measures data with a total 20,103 bruise assessments. Results revealed 415 nm with yellow filter resulted in an almost 0.5-point increase in BVS/AVS score across all skin colors (Estimate = 0.46; 95% CI: 0.43, 0.49; p < 0.001), a clinically significant improvement in ability to visualize bruises. Conversely, 515 nm (Estimate = -0.80; 95% CI: -0.84, -0.76; p < 0.001) and 535 nm (Estimate = -0.64, 95% CI: -0.67, -0.60; p < 0.001) with red filter resulted in more than 0.5-point decrease in BVS/AVS score. The use of ALS is supported by the data and results in improved bruise visibility during medical forensic examinations.

Improving the Forensic Documentation of Injuries Through Alternate Light: A Researcher-Practitioner Partnership

An alternate light source (ALS) is a practitioner-driven technology that can potentially improve the documentation of injuries among victims of interpersonal violence. However, evidence-based guidelines are needed to incorporate and document an ALS skin assessment into a forensic medical examination that accurately reflects the science, context of forensic nursing practice, trauma-informed responses, and potential impact on criminal justice stakeholders. This article introduces the forensic nursing community to a current translation-into-practice project focused on developing and evaluating an ALS implementation program to improve the assessment and documentation of bruises among adult patients with a history of interpersonal violence. Our researcher-practitioner collaboration uses theory-based approaches that consider both the developed program's practice context and stakeholder impact. The goal is to provide evidentiary support for adult victims of violence and a more equitable forensic nursing practice that benefits diverse patient populations.

The Impact of Skin Color on the Recognition of Blunt Force Injuries

ABSTRACT

Dark skin may obscure injuries. This is reflected in the illustrations in textbooks, which generally depict blunt force injuries in victims with light skin tones. We explored whether forensic pathologists can reliably recognize blunt force injuries in dark-toned skin by comparing the average number of contusions and abrasions of motor vehicle accident victims with dark- and light-toned skin. We also investigated whether the race of the forensic pathologist observer mattered. We found a significant difference in the number of injuries recorded in autopsies of motor vehicle accident victims based upon skin tone; there was also a difference in the race of the observer.