Traumatic fracture-dislocation of the hip following rugby tackle: a case report
© Venkatachalam et al; licensee BioMed Central Ltd. 2009
Received: 7 August 2009
Accepted: 15 December 2009
Published: 15 December 2009
Posterior fracture-dislocation of hip is uncommonly encountered in rugby injuries. We report such a case in an adult while playing rugby. The treating orthopaedician can be caught unaware and injuries in such sports can be potentially misdiagnosed as hip sprains. Immediate reduction of the dislocation was performed in theatres. The fracture was fixed with two lag screws and a neutralization plate. This led to early rehabilitation and speedy recovery with return to sporting activities by 12 months.
Posterior fracture dislocation of the hip is commonly seen following high energy motor vehicle accidents. It is uncommon in sports although hip dislocations have been reported following skiing, gymnastics and even jogging. This case report highlights the magnitude of forces that can be encountered by the hip joint in a sport like rugby. Open reduction, anatomical internal fixation with good rehabilitation form the cornerstone for good recovery.
Rugby is a very popular contact sport in the United Kingdom and Europe. Head and neck are the common regions injured and these injuries are usually ligamentous in origin. Concussion in head injuries and lower limb fractures account for two percent each in this sport [1, 2], and .
Traumatic posterior fracture dislocation of the hip is a devastating injury. The incidence of such injuries in sports is significantly lower. There are around 14 cases of traumatic hip dislocations reported in literature during recreational sports like soccer, skiing, basketball, gymnastics, equestrian sports and even jogging [4, 5]. Only four have had associated fractures with the dislocation. The symptoms and signs of dislocation can be potentially misdiagnosed as a simple hip sprain.
In sports, hip subluxation is more common than dislocation indicating the lesser energy involved compared to motor vehicle accidents . The common mechanism in motor vehicle accidents is due to knee hitting the dashboard with the leg in adducted and flexed position leading to a posteriorly directed force on the hip . Letournel and Judet  have shown that the posterior acetabulum rim bears the impact of the femoral head with this leg position. The characteristic fractured acetabular posterior lip confirms the force vector and pathomechanism of injury. The indentation of the femoral head also reaffirms this mechanism. With traumatic hip dislocation, prompt reduction is of paramount importance in order to decrease the risk of subsequent osteonecrosis [9, 10] as reduction may relieve tension across the femoral and circumflex vessels . Also the incidence of sciatic nerve injury, post traumatic arthrosis and heterotrophic ossification comes down with emergent reduction. The radiographic workup of a patient who has a suspected hip dislocation should include radiographs of the hip, including Judet views to evaluate for posterior acetabular lip fracture.
Operative treatment is required to achieve anatomical reduction of acetabular fracture, rigid fixation and early mobilization of the joint following immediate closed reduction. In one of the studies, more than 80% had unsatisfactory results following non operative management . Indications for operative management include articular displacement of > 2 mm, intraarticular fracture fragments, unstable hip after closed reduction, irreducible hip, vascular injuries, and ipsilateral femoral fractures . Posterior wall acetabular fractures carry a poorer prognosis due to frequent association with direct cartilage injury, comminution, impaction and soft tissue trauma . Sciatic nerve injury on presentation has been reported as high as 23% . Deep vein thrombosis and deep infection are other well known complications associated with acetabular fracture surgery . Indomethacin is regarded as effective prophylaxis with the reduction in the incidence of heterotrophic ossification after operation by 30-45% .
This case highlights the importance of prompt recognition of this devastating injury and the huge magnitude of forces across hip joint in rugby. The probable reasons for better operative results following sports injuries compared to motor vehicle accidents could be due to lesser energy involved, intact soft tissue, lower incidence of sciatic nerve damage and ability to reduce the fracture anatomically due to absence of comminution/cartilage damage. Immediate reduction of dislocation, anatomical reduction of fracture fragment, rigid fixation and early mobilization lead to good results.
Written informed consent was obtained from the patient for publication of this case report and accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal
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