• bilateral
• dislocation
• hip
• trauma

To identify postoperative complications and risk factors associated with hip fracture and dislocation following primary arthroscopic surgical management of femoroacetabular impingement (FAI) syndrome.

MarketScan was queried to identify patients who underwent FAI surgery from 2007 to 2016. Patients were stratified into 2 groups: acetabuloplasty only or femoroplasty only. A subanalysis of combined acetabuloplasty and femoroplasty also was undertaken. Surgical outcomes were followed postoperatively for 180 days. Multivariate logistic regression was used to control for with an alpha value of 0.05 set as significant.

This study identified 13,809 patients (mean age, 36.3 years) who underwent primary acetabuloplasty or femoroplasty. We also identified 10,026 patients who underwent both procedures. Postoperative complication rates were similar between the cohorts (acetabuloplasty 17.1%, femoroplasty 19.9%, P = .0622). Rates of hip fracture (femoroplasty: 2.4% vs acetabuloplasty: 2.0%, P = .0302) and heterotopic ossification (femoroplasty: 11.3% vs acetabuloplasty: 8.8%, P < .0001) were greater in the femoroplasty-only cohort. Combined acetabuloplasty and femoroplasty was associated with the greatest complication burden of 21.6% (P < .0001). After multivariate regression, differences in age, sex, comorbid status, or procedure type did not influence odds in risk for postoperative hip dislocation. Adjusted data showed that neither femoroplasty nor acetabuloplasty influenced odds of hip fracture (P > .05). Patients who were aged younger than 20 years old were significantly less likely to fracture their hips postoperatively than patients aged 60+ years (odds ratio 0.3, 95% confidence interval 0.1-0.8). Hypertension was independently associated with increased odds of hip fracture (odds ratio 1.7, 95% confidence interval 1.2-3.5).

Older age, male sex, and hypertension all carry increased risk for a hip fracture following acetabuloplasty or femoroplasty. Patient- and procedure-specific factors that could be assessed with this database did not influence risk for hip dislocation.

Level III; retrospective comparative observation trial.

Introduction: Traumatic hip dislocations (THDs) are severe injuries associated with considerable morbidity. Delayed recognition of fracture dislocations and neurovascular deficits have been proposed to cause deleterious long-term clinical outcomes. Therefore, in this study, we aimed to identify characteristics of epidemiology, injury mechanisms, and associated injuries to identify patients at risk. Methods: For this study based on the TraumaRegister DGU^® (January 2002–December 2017), the inclusion criterion was an Injury Severity Score (ISS) ≥9 points. Exclusion criteria were an isolated head injury and early transfer to another hospital. The THD group was compared to a control group without hip dislocation. The ISS and New ISS were used for injury severity and the Abbreviated Injury Scale for associated injuries classification. Univariate and logistic regression analyses were performed. Results: The final study cohort comprised n = 170,934 major trauma patients. We identified 1359 individuals (0.8%) with THD; 12 patients had sustained bilateral hip dislocations. Patients with THD were predominantly male (79.5%, mean age 43 years, mean ISS 22.4 points). Aortic injuries (2.1% vs. 0.9%, p ≤ 0.001) were observed more frequently in the THD group. Among the predictors for THDs were specific injury mechanisms, including motor vehicle accidents (odds ratio (OR) 2.98, 95% confidence interval (CI) 2.57–3.45, p ≤ 0.001), motorcycle accidents (OR 1.99, 95% CI 1.66–2.39, p ≤ 0.001), and suicide attempts (OR 1.36, 95% CI 1.06–1.75, p = 0.016). Despite a lower rate of head injuries and a comparable level of care measured by trauma center admission, both intensive care unit and total hospital stay were prolonged in patients with THD. Conclusions: Since early diagnosis, as well as timely and sufficient treatment, of THDs are of high relevance for long-term outcomes of severely injured individuals, knowledge of patients at risk for this injury pattern is of utmost importance. THDs are frequently related to high-energy mechanisms and associated with severe concomitant injuries in major trauma patients.

Obturator dislocation is a rare type of hip dislocation, accounting for about 2%-5% of all hip dislocations. The occurrence of old unreduced obturator dislocation is even more infrequent, with only 17 cases reported in nine studies, most of which were from the 1950s to 1980s in developing countries.

A 38-year-old woman from Hunan Province, China presented with stiffness of the left hip in abduction, flexion, and external rotation after falling from a 2-meter-tall tree onto her left knee 1.5 mo prior. Pelvic radiograph and computed tomography revealed obturator dislocation of the left hip accompanied by impaction fracture at the superolateral aspect of the left femoral head without associated acetabulum fracture. Open reduction was performed, resulting in restoration of the concentric alignment of the left hip. After surgery, 6-wk skin traction was applied and the patient was kept in bed for an additional 2 wk. At 3 mo after surgery, the patient reported experiencing some pain, which did not affect the function of the affected limb, and some movement restriction but no abduction deformity or claudication was present. An X-ray showed that the left hip was homocentric, and there was no sign of posttraumatic arthritis or avascular necrosis.

Open reduction may be an effective treatment strategy for the rare condition of old unreduced obturator dislocation with short neglect time.

• Hip dislocation
• Obturator dislocation
• Unreduced
• Open reduction
• Case report

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A rare presentation of hip fracture-dislocation: irreducible.

Fractures–dislocations of the femoral head are rare, and irreducible dislocations are even rarer. The functional prognosis is poor.

We report the case of a 23-year-old male brought to the emergency room following low-energy trauma. X-rays and a computed tomography scan revealed a Pipkin II fracture–dislocation of the right femoral head. We attempted reduction with the patient under general anesthesia; this failed, so we proceeded to total hip arthroplasty (THA).

A femoral head fracture has a poor prognosis; the principal complications are osteonecrosis, osteoarthritis, and heterotopic ossifications. No surgical treatment algorithm for a femoral head fracture (for fragment excision, followed by internal fixation or THA) is available, given the rarity of the injury and the lack of sufficient cases.

We describe the mechanism of low-energy injury, as well as the controversial THA treatment chosen by this young patient.

Bilateral hip dislocation is a rare event, asymmetric dislocation is even rarer. Due to the intrinsic stability of the hip joint this lesions usually follow a high energy trauma. Because of the common associated lesions, the initial clinical assessment should be performed thoroughly. CT scan rather than x-rays offers a complete survey of these possible associated injuries such as thoracic or abdominal bleedings, neurologic lesions or fractures directly associated with the hips dislocations. The first goal should be reduction of the dislocation to prevent avascular necrosis (AVN) of the femoral head and arthritis. We report a case of a young man with right anterior hip dislocation and left posterior hip dislocation with associated fracture of the posterior wall. (www.actabiomedica.it)

• Acute care
• Anesthesia
• Hip dislocation
• Sedation
• Trauma

Posterior hip dislocations are the most common luxation types of the hip joint and a well-known and well-described condition. However, we report a case of posterior hip luxation with a series of posttraumatic muscular disorders that were difficult to identify and have not been described previously in scientific literature. We performed clinical and radiological follow-up of an individual for a period of over 19 months post trauma. Informed consent for the anonymized publication of this case was received from the patient. The presented patient is a 20-year-old female, athletic individual in generally good health condition. Our patient suffered from a posterior hip dislocation after a skiing accident on an iced slope. Posttraumatic follow-up was performed owing to persistent moderate hip pain. The patient underwent several experts’ consultations as well as two MRI examinations at 2 months and 19 months after the skiing trauma. Both of the MRIs showed several ruptured parts of the periarticular musculature. At the second MRI, additional compensatory hypertrophy of the piriformis muscle was detected. This report clearly illustrates the importance of profound anatomical knowledge of the surrounding structures of the hip joint, especially as the high psychological strain on the patient could have been reduced by a swifter and appropriate diagnosis.

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Hip dislocation is considered an orthopedic emergency and should be reduced as soon as possible to decrease rate of complications.

Hip dislocations usually occur as a result of motor vehicle accidents and require high energy trauma. Bilateral hip dislocations are rare compared to unilateral ones. Most reported cases are asymmetrical simultaneous bilateral anterior and posterior dislocations.

This case report describes a 32years female passenger who was involved in road traffic accident and had bilateral asymmetrical hip dislocations with one side posterior and the other side obturator intra-pelvic dislocation. Concentric reduction was achieved by closed reduction of both sides under general anesthesia but the patient required skeletal traction applied to the unstable side for three weeks.

Hip dislocation is considered an orthopedic emergency and should be reduced as soon as possible to decrease rate of complications. Since hip dislocation usually occurs with high energy trauma so looking for associated injuries is of paramount importance and assessing such patients should be done according to advanced trauma life support.

Obturator intra-pelvic hip dislocation is challenging case and can be treated by closed reduction.

• Asymmetrical hip dislocation
• Bilateral
• Hip dislocation
• Obturator intra-pelvic dislocation

• Evolution
• Reduction
• Traumatic hip dislocation