Blunt kidney trauma

The kidney is injured in approximately 10% of all significant blunt abdominal trauma. Of those, 13% are sports-related when the kidney, followed by testicle, is most frequently involved. However, the most frequent cause by far is motor vehicle accident followed by falls. The consequences are usually less severe than injuries involving other internal organs.

Abdominal CT showing left renal artery injury

1 Sports related injury
2 Diagnosis
3 Investigation
4 Treatment
5 See also
6 References

Sports related injury

Organized sport. Blunt injuries to the kidney from helmets, shoulder pads, and knees are described in football,^[1] and in soccer, martial arts, and all-terrain vehicle accidents. A literature review of peer-reviewed articles in May 2009 demonstrated that urogenital injuries are uncommon in team and individual sports, and that most of them are low-grade injuries, cycling being the most commonly associated, followed by winter sports, horse riding and contact/collision sports.^[2]

A special situation has existed in the athletic participant with a single kidney. Formerly, the American Academy of Pediatrics Committee on Sports Medicine and Fitness advised against such children and adolescents from participating in contact sports. However, a study of 45,000 children with kidney injuries demonstrated no kidney loss in any contact sport. Sledding, skiing and rollerblading did, however, result in such loss.^[3] Further, data from the National Athletic Trainers' Association High School Injury Surveillance Study, an observational cohort study during the 1995-1997 academic years, have been used to compare incidence rates for sport-specific injuries to specific organs. There were over 4.4 million athlete-exposures, defined as 1 athlete participating in 1 game or practice. Student athletes incurred kidney injuries most often playing football (12 injuries) or girls' soccer (2 injuries).^[4]

The American Academy of Pediatrics currently recommends a "qualified yes" for participation by athletes with single kidneys in contact/collision sports although some physicians remain reluctant to acquiesce.

Diagnosis

In blunt injury, imaging is indicated if there is gross hematuria, or if the patient exhibits shock together with either gross or microscopic hematuria.

Investigation

The imaging modality of choice is contrast-enhanced, computed tomography (CT) which is readily available in most emergency departments of moderate or above size. Scan times have become shorter with each generation of scanners and current scans are quick and accurately demonstrate renal injuries together with associated injuries to other abdominal or retroperitoneal organs.

Treatment

Unlike [6]

References

^ Brophy RH, Gamradt SC, Barnes RP, Powell JW, DelPizzo JJ, Rodeo SA, Warren RF (Jan 2008). "Kidney injuries in professional American football: implications for management of an athlete with 1 functioning kidney". Am J Sports Med. 36(1) (7): 85–90.

^ Sacco E, Marangi F, Pinto F, D'Addessi A, Racioppi M, Gulino G, Volpe A, Gardi M, Bassi PF (Apr–May 2010). "Sports and genitourinary traumas". Urologia. 77(2) (2): 112–25.

^ Johnson B, Christensen C, Dirusso S, Choudhury M, Franco I date=2005 Aug (August 2005). "A need for reevaluation of sports participation recommendations for children with a solitary kidney". J Urol. 174(2) (2): 686–9.

^ Grinsell MM, Butz K, Gurka MJ, Gurka KK, Norwood V (Jul 2012). "Sport-related kidney injury among high school athletes". Pediatrics. 130(1) (1): e40–5.

^ Alonso RC, Nacenta SB, Martinez PD, Guerrero AS, Fuentes CG (Nov 2009). "Kidney in danger: CT findings of blunt and penetrating renal trauma". Radiographics. 29(7) (7): 2033–53.

^ Danuser H, Wille S, Zöscher G, Studer U (Jan 2001). "How to treat blunt kidney ruptures: primary open surgery or conservative treatment with deferred surgery when necessary?". Eur Urol. 39(1) (1): 9–14.

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Blunt kidney trauma