Elsevier

Urology

Volume 94, August 2016, Pages 227-231
Urology

Reconstructive Urology
Epidemiology of Traumatic Adrenal Injuries Requiring Surgery

https://doi.org/10.1016/j.urology.2016.03.022Get rights and content

Objective

To analyze adrenal injuries using the National Trauma Data Bank. Adrenal trauma is rare and current literature is lacking in data from large case series.

Methods

A retrospective analysis of the National Trauma Data Bank from the years 2007-2011 was performed. Patient demographics, Injury Severity Score (ISS), mechanism of injury, type of trauma, associated injuries, and development of shock were assessed. Multivariable models were used to determine association with outcomes, such as characterization of injury, need for adrenalectomy, intensive care unit admission, and death.

Results

Of the 1,766,606 trauma cases recorded, 7791 involved 1 or both adrenal glands (0.44%). Common associated injuries were to the ribs (50.9%), thorax (50.0%), and liver (41.6%). Eighty adrenal injuries required surgery (80/7791, 1.0%), none of which were isolated adrenal injuries (0/120, P = .63). Higher ISS (P = .009), Black race (P = .031), penetrating injury (P < .001), and splenic (P < .001) and intestinal injuries (P = .018) were associated with need for adrenalectomy. No isolated adrenal injuries were associated with death (12% vs 0%, P < .0001). Older age (P < .001), higher ISS (P < .001), chronic kidney disease (P = .009), penetrating injuries (P < .001), and injuries to the aorta/vena cava (P = .008), peripheral vasculature (P < .0001), thorax (P = .029), brain/spinal cord (P < .001), and abdominal polytrauma (P = .005) were associated with mortality.

Conclusions

Adrenal injuries are rare, comprising 0.44% of recorded traumatic injuries. Isolated adrenal injuries were not fatal and did not require surgery, and thus should be managed conservatively. Detection of adrenal injury in polytrauma patients is key, particularly penetrating trauma and concurrent splenic and/or intestinal injuries, as these patients are more likely to require adrenalectomy.

Section snippets

Methods

We performed a retrospective analysis of the NTDB from 2007 to 2011. The following International Classification of Diseases-9 diagnosis codes where used to identify adrenal injury: 868.01, 868.11, 868.09, and 868.19. The dataset was limited to patients ≥16 years of age. The following codes were used to determine if the patient received an adrenal procedure: 7.22, 7.29. 7.3, 7.43, 7.44, and 7.49. The algorithm used to select patients can be seen in Figure 1. Patient demographics, Injury Severity

Results

Of the 1,766,606 trauma cases in the dataset, 7791 were identified involving 1 or both adrenal glands (0.44%). There were 7026 blunt, 646 penetrating, and 119 unclassified injuries. The most common associated organ injuries were to the ribs (50.9%), thorax (50.0%), liver (41.6%), vertebrae (30.9%), kidney (27.8%), and spleen (22.0%). Of the adrenal injuries, 120 were isolated to the adrenal glands (120/7791, 1.5%). Factors associated with isolated adrenal injury include lower ISS (P < .001),

Discussion

Trauma is the fifth leading cause of death in the United States and the leading cause of death worldwide.6 Nearly 1.8 million injuries were captured in the NTDB from 2007 to 2011, of which only 0.44% affected either 1 or both adrenal glands. This rate is slightly higher than the previously published rates of 0.15%-0.22%; these discrepancies could be attributed to the fact that prior studies were performed using single-institution data, or that the utilization of computed tomography scans

Conclusion

Adrenal injuries are rare, comprising 0.44% of recorded traumatic injuries. To our knowledge, this is the first study using a national database to examine the characteristics of these traumas. In our database, isolated adrenal injuries were not fatal and did not require surgery, thus surgeons should feel comfortable managing these injuries conservatively. We should be vigilant about detecting adrenal injuries in polytrauma patients, particularly those of a penetrating etiology or who present

References (16)

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Financial Disclosure: The authors declare that they have no relevant financial interests.

1

These authors contributed equally to this work.

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