Occult trauma in high-risk populations

The Homeless Population: Medical Refugees in a Mature Trauma System

INTRODUCTION

On any given day, there are >550,000 homeless persons in the United States. Little research has examined the relationship between the homeless population and traumatic injuries. We hypothesized that homeless trauma patients have a higher mortality compared to those who are not homeless.

METHODS

The Pennsylvania Trauma Outcome Study database was retrospectively queried from 2003-2018 for all adult (age ≥15) patients admitted to trauma centers in Pennsylvania. Homelessness was defined as homeless on admission or homeless as their discharge status. Patient demographics, comorbidities, and clinical variables were compared between homeless and non-homeless patients. Logistic regression was used to control for age, gender, injury severity, injury type, admission Glasgow Coma Scale, and systolic blood pressure to assess morbidity and mortality.

RESULTS

773 patients were identified upon query. Homeless trauma patients were more likely to be male, younger, black, and of Hispanic ethnicity. Compared to non-homeless, they were more likely to have a positive drug screen or mental illness at the time of injury. They were not more significantly injured than their counterparts; however, in adjusted analysis, the homeless had significantly higher odds of both complications (Adjusted Odds Ratio [AOR]: 3.11; 95%CI: 2.64-3.66, P < .001) and mortality (AOR: 1.79; 95%CI: 1.29-2.50, P = .001).

CONCLUSION

Although homeless patients were not more severely injured than the general trauma population, they had significantly higher odds of both complications and mortality. This population represents a very vulnerable community in need of medical intervention and injury prevention programs.

Is There a Need for Abdominal CT Scan in Trauma Patients With a Low-Risk Mechanism of Injury and Normal Vital Signs?

Background Clinically significant injuries are often missed in trauma patients with low-risk mechanisms of injury and lack of "red flags," such as abnormal vital signs. The purpose of this retrospective analysis was to evaluate the efficacy of computed axial tomography (CT) for identifying occult injuries in a high-volume trauma center. Methods Records from our institutional trauma registry were retrospectively extracted, examining encounters from January 2015 to October 2019. Those patients between the ages of 18 and 65 who were referred to the trauma team with a CT scan of the abdomen and had low-risk mechanisms of injury, a Glasgow Coma Scale (GCS) score of 15, and normal vital signs at presentation were included. Patients in the lowest trauma categorization (Level Three, Consult) met the study definition for the low-risk mechanism of injury. Demographic and clinical data were abstracted for all patients. For this analysis, patients were divided into two groups based on age (18 - 40 years or 40 - 65 years). Injuries found on CT, their clinical significance, and the likelihood of being missed without CT were determined. Results Of 2,103 blunt trauma patients that received a CT scan of the abdomen from January 2015 to October 2019, 134/2,103 (6.4%) met the inclusion criteria (mean age: 44.6 years; 72.3% male). Patients between the ages of 40 and 65 years comprised 61.2% (82/134) of the study population. Of the included patients, 17.2% (23/134) had at least one acute traumatic injury identified after CT imaging of the torso. Occult injuries found on CT included rib fracture with associated lung injuries (10/23, 43.5%), splenic laceration (4/23, 17.4%), liver laceration (3/23, 13.0%), gluteal hematoma with active bleeding (1/23, 4.3%), sternal fractures (3/23, 13.0%), and thoracic or lumbar spine fractures (2/23, 8.7%). An independent review of the medical records determined that 9.0% (12/134) of these patients had traumatic injuries that would have been missed based on clinical examination without CT. Conclusions Based on our experience, utilizing CT imaging of at least the abdomen as a routine screening measure for all trauma consults - even low-risk patients with normal vital signs - can rapidly and accurately identify clinically significant injuries that would have been otherwise missed in a notable portion of the population.