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Home All Specialties Emergency

Use of CT for adult fall patients is rising in the emergency department

byDylan WolmanandAaron Maxwell, MD
March 2, 2015
in Emergency, Imaging and Intervention, Uncategorized
Reading Time: 3 mins read
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1. Between 2001 and 2010, a 2.5-fold increase in CT utilization has occurred among adult fall patients visiting the emergency department, yet the proportion of these patients with life-threatening injuries has only increased by 2.5% overall.

Evidence Rating Level: 3 (Average)

Study Rundown: Given the accessibility, speed of scanning, and sensitivity for traumatic injury of computed tomography (CT) imaging, this modality has continued to rise in popularity in the evaluation of patients in the emergency department (ED). With the increasing elderly population in the United States and the concordant increase in incidence of fall-related injuries, an understanding of CT utilization trends is important given the role of imaging in health care costs and policy. The current study retrospectively examined records from the National Hospital Ambulatory Medical Care Survey (NHAMCS) from 2001 to 2010, which is a large survey database representing sampled ED visits across the nation tabulating demographic, diagnostic, and treatment data extrapolated to estimate data for all ED visits in the United States during the study period.  By examining data regarding patient demographics, CT utilization, diagnoses, and treatments for those suffering from a traumatic fall, the authors found that the number of fall patients over age 65 increased significantly during the study period, as did the number of patients receiving CT imaging. However, among all patients, the proportion of those with life-threatening injuries increased little, suggesting that relative to injury severity, CT may be overutilized in the diagnosis of adult ED fall patients. These findings highlight a need for a dedicated set of criteria in determining the value of CT in a given patient. The study was limited primarily by the nature of the database it drew data from: the NHAMCS is extrapolated from a smaller number of ED visits at selected hospitals to represent national estimates, which may be inaccurate based on the method of data collection, low interobserver agreement in data collection, and a lack of clear information regarding which parts of the medical record are available to surveyors. Additionally, the data were not adjusted for fall severity, nor were outcomes following admission examined, highlighting a potential future avenue in determining if increased CT utilization is driving an improvement in care.

Click to read the study in the American Journal of Roentgenology

Relevant Reading: Emergency Department Computed Tomography Utilization in the United States and Canada

In-Depth [cross-sectional study]: A total of 22 166 records of ED visits for adult patients suffering from a fall were drawn from the NHAMCS, which were extrapolated to estimate that 73 241 368 adult fall patients were seen in EDs across the United States between 2001 and 2010. Across the study period, the number of fall patients increased most significantly in the 65-74 and 75+ year old groups (50.1% and 33.1% increases, respectively.) Overall, 11.4% of the entire population of fall patients in 2001 underwent CT imaging, as compared to 28.0% in 2010 (P < 0.0001). Of those in the 65-74 year old group, utilization increased from 15.5% to 38.0%, while increasing from 21.1% to 48.1% in the 75+ year old group. The proportion of fall patients with life-threatening injuries increased from 5.7% to 8.2% (P < 0.0001) between 2001 and 2010, with respective increases in serious injury from 7.0% to 10.1% and from 10.8% to 15.8% among the 65-74 and 75+ year old subgroups. Based on these data, the odds of CT utilization for any given patient in 2010 as compared to 2001 was 2.62 (CI 1.77-1.78), and on subgroup analysis, those most likely to receive imaging were 65+ years old (OR 1.77 aged 65-74, OR 2.17 aged 75+), male (OR 1.18) and arriving by ambulance (OR 2.58).

Image: CC/Jmarchn/Wiki

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