Poor Test Characteristics for the Digital Rectal Examination in Trauma Patients
Study objective
Current advanced trauma life support guidelines recommend that a digital rectal examination be performed as part of the initial evaluation of all trauma patients. Our goal is to estimate the test characteristics of the digital rectal examination in trauma patients.
Methods
We conducted a retrospective medical record review study of consecutive trauma patients treated in our emergency department from January 2003 to February 2005 for whom the trauma team was activated and who had a documented digital rectal examination.
Results
One thousand four hundred one patients met our selection criteria and were included in the analysis. We estimated the composite sensitivity of the digital rectal examination (any abnormal finding) for detecting any of the index injuries to be 22.9% (95% confidence interval [CI] 16% to 30%) and the specificity to be 94.7% (95% CI 93% to 96%). The calculated sensitivity and specificity for the digital rectal examination were 37% (95% CI 23% to 50%) and 96% (95% CI 95% to 97%), respectively, for detection of spinal cord injury, 5.7% (95% CI 0% to 13%) and 98.9% (95% CI 98% to 99%) for detection of bowel injury, 33.3% (95% CI 0% to 87%) and 99.8% (95% CI 99% to 100%) for detection of rectal injury, 0% and 99.8% (95% CI 99% to 100%) for detection of pelvic fracture, and 20% (95% CI 0% to 55%) and 99% (95% CI 98% to 100%) for detection of urethral disruption.
Conclusion
The digital rectal examination has poor sensitivity for the diagnosis of spinal cord, bowel, rectal, bony pelvis, and urethral injuries. Our findings suggest that the digital rectal examination should not be used as a screening tool for detecting injuries in trauma patients.
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Supervising editors: Michael J. Schull, MD, MSc; Allan B. Wolfson, MDAuthor contributions: GZS conceived the study. GZS, MTM, and WRM designed the study. GZS supervised the conduct of the study and data collection and provided quality control. MTM and WRM contributed to the statistical analysis with advice, with GS doing the primary analysis. Data abstraction was done by GZS, JB, JC, HKD, DH, MS, SS, and ES. GZS drafted the article, with all authors contributing significantly to its revisions. GZS takes responsibility for the paper as a whole.Funding and support: The authors report this study did not receive any outside funding or support and there were no other conflicts of interest to declare. See the Manuscript Submission agreement form, published each month, for details of covered relationships.Publication dates: Available online March 27, 2007.Reprints not available from the authors.
PII: S0196-0644(07)00082-0
doi:10.1016/j.annemergmed.2007.01.022
© 2007 American College of Emergency Physicians. Published by Elsevier Inc. All rights reserved.
