Anterior Hip Dislocation 5 Months After Hip Arthroscopy

Hip dislocation subsequent to hip arthroscopy is a rare complication. We report on a case of low-energy anterior hip dislocation that occurred 5 months after hip arthroscopy, a period notably longer than any previously reported event. The patient was a track and field athlete who presented and received treatment for a labral tear and cam lesion. The athlete then dislocated her hip postoperatively during competitive jumping, a motion that requires significant hip flexion and extension. The most likely cause of the anterior dislocation was failure to close the capsule at the completion of surgery, lending credibility to recent trends in the literature suggesting routine capsular closure. We believe that a partial psoas release also contributed to dynamic hip instability because of increased femoral anteversion in this patient. This case suggests that hip capsule closure should be considered at the completion of every procedure and that a psoas release should be avoided in patients with significant anteversion. Furthermore, the biomechanics of competitive jumping may make these athletes more prone to dislocation and require more conservative return-to-sport recommendations.     

Anterior Dislocation of the Hip Associated with an Actebular Fracture: Case Report

Abstract Anterior hip joint dislocation is less common than posterior dislocation. Although fractures of the acetabulum can occur in anterior hip dislocations, they are infrequently. In this article, we report an uncommon lesion in a woman who sustained an anterior dislocation of the hip associated with a fracture of the acetabular wall. Close reduction was performed immediately the initial injury. The patient underwent open reduction and internal fixation since the hip joint was result unstable and the CT scan showed the presence of a bone fragment of the anterior acetabular wall. At 2-year follow-up, the clinical and radiological results are excellent.     

Non-Traumatic Anterior Dislocation of a Total Knee Replacement Associated with Neurovascular Injury

Prosthetic total knee replacements rarely dislocate. When dislocation does occur, it is usually in a posterior direction in association with a posterior stabilised, cruciate-sacrificing prosthesis. Neurovascular injury is unusual. In this report, we describe a case of anterior dislocation of a cruciate-retaining total knee replacement in a 67-year-old woman. The dislocation occurred in the absence of overt trauma and resulted in severe neurovascular injury.     

Complete Medial Dislocation of the Tarsal Navicular without Fracture: Report of a Rare Injury

Complete dislocation of the tarsal navicular, without fracture of the navicular, is an uncommon injury. A review of the published data revealed only 15 previous reported cases. The rarity of this injury can be attributed to the rigid bony and ligamentous support surrounding the navicular, which usually undergoes fracture and dislocation rather than pure dislocation of the navicular. The mechanism and appropriate treatment of this injury remains unclear. In the present report, we describe the case of a 29-year-old male who sustained complete dislocation of the tarsal navicular, without fracture of the navicular, along with fractures of the cuboid and calcaneus, when he was involved in a motor vehicle collision. The proposed mechanism of injury in this case was that of a pronation-abduction force applied to the midfoot, resulting in a transient midtarsal dislocation and disruption of the ligamentous support of the navicular, with medial dislocation of the navicular when the midtarsal dislocation was reduced. The anterolateral calcaneus and cuboid fractures were likely from an avulsion injury through the bifurcate ligament. The patient was treated successfully with closed reduction and Kirschner wire fixation of the navicular combined with application of a spanning external fixator. The pins and external fixator were removed at 7 weeks postoperatively, and the navicular was stable at that time. The patient was lost to follow-up shortly thereafter.     

Plexus Injury after Reduction of Anterior Caudal Dislocation of the Shoulder

The case is reported of a 45-year-old male patient who fell when his ladder slipped away from underneath him. He sustained a bilateral dislocation of the shoulders (bilateral luxatio erecta humeri). The injury on one hand was a glenohumeral dislocation of the humerus head right to ventral and caudal, accompanied by a suspected fracture of the tuberculum major and on the other hand a glenohumeral dislocation of the left humerus head to ventral and caudal, accompanied by a suspected total collum fracture. Based on this case and the pertinent literature, the patho-physiology, diagnosis and treatment of this rare injury are discussed.

After immediate closed reduction, soft tissue damage, fractures or neurovascular lesions should be operated on as soon as possible.     

Plexus Injury after Reduction of Anterior Caudal Dislocation of the Shoulder

The case is reported of a 45-year-old male patient who fell when his ladder slipped away underneath him. He sustained a bilateral dislocation of the shoulders (bilateral luxatio erecta humeri). The injury on the one hand a gleno-humeral dislocation of the humerus head right to ventral and caudal, accompanied by a suspected fracture of the tuber-culum major and on the other hand a glenohumeral dislocation of the left humerus head to ventral and caudal, accompanied by a suspected total collum fracture. Based on this case and the pertinent literature, the patho-physiology, diagnosis and treatment of this rare injury are discussed. After immediate closed reduction, soft tissue damage, fractures or neurovascular lesions should be operated on as soon as possible.     

Predictors of Change in Functional Outcome at six months and twelve months after Severe Injury: A Retrospective Cohort Study

Background

There is increasing focus on long-term survival, function and quality-of-life for trauma patients. There are few studies tracking longitudinal changes in functional outcome over time. The goal of our study was to compare the Glasgow Outcome Scale-Extended (GOSE) at 6 months and 12 months in blunt trauma survivors with an Injury Severity Score (ISS) of more than 15.

Methods

Using the Singapore National Trauma Registry 2011–2013, patients with 6-month GOSE and 12-month GOSE scores were analysed. Patients were grouped into three categories—those with the same score at 6 months and 12 months, an improvement in score, and a worse score at 12 months. Ordinal regression was used to identify risk factors for improved score. Patients with missing scores at either 6 months or 12 months were excluded.

Results

We identified 478 patients: 174 had an improvement in score, 233 stayed the same, and 71 had worse scores at 12 months compared to 6 months. On univariate ordinal regression, the following variables were associated with same or better function at 12-months compared to 6-months: male gender, being employed pre-injury, thoracic Abbreviated Injury Scale (AIS) of 3 or more, anatomical polytrauma (AIS of 3 or more in 2 or more body regions), and road traffic injury mechanism. Older age, low fall, increasing Charlson comorbidity scores, new injury severity score, and head and neck AIS of 3 or more were associated with worse function at 12 months compared to 6 months. ISS and revised trauma score were not significant predictors on univariate or multivariable analysis.On multivariable ordinal regression, motor vehicle mechanism (OR 2.78, 1.51–5.12, p?=?0.001) was associated with improved function, while male gender (OR 1.36, 95% CI 1.02–1.82, p?=?0.039) predicted improved function at 12 months.

Conclusions

Females experience worse functional outcomes at 12 months, potentially due to majority of female injuries being low falls in the elderly. In contrast, motor vehicle injury patients had better functional outcomes at 12 months. Additional interventional strategies for high-risk groups should be explored.

     

髋臼骨折脱位合并坐骨神经损伤的治疗和预后

目的了解髋臼骨折脱位坐骨神经损伤概率、损伤程度,以及手术治疗与非手术治疗的疗效。方法自1999年7月～2007年8月收治208例髋臼骨折脱位合并坐骨神经损伤31例,手术治疗13例,非手术治疗18例。结果手术治疗的13例中8例有胫神经损伤表现,术前胫神经平均分为3.54分(按照LSUHSC评分),3例术后有恢复,4例完全恢复正常,1例未恢复,术后胫神经评分平均为4.77分。13例术前腓总神经平均分为2.23分,术后6例有恢复,2例恢复正常,5例没有恢复,术后腓总神经平均分为2.69分。非手术治疗的18例中14例有胫神经损伤,术前胫神经平均分为3.67分,13例有恢复,12例完全恢复正常,术后胫神经平均分为4.89分。非手术治疗病人都有腓总神经损伤,治疗前腓总神经平均分2.39分,治疗后13例有恢复,3例恢复正常,5例没有恢复,术后腓总神经平均分为3.39分。统计手术治疗与非手术治疗没有明显差异(P=0.206)。胫神经恢复好于腓总神经(P0.01)。结论髋臼骨折引起的坐骨神经损伤,其中腓总神经分支损伤更多见、更严重,无论手术治疗还是非手术治疗恢复都比胫神经差;坐骨神经损伤手术治疗效果并不优于非手术治疗。     

Spontaneous Recurrent Dislocation After Primary Birmingham Hip Resurfacing: A Rare Complication in a 44-Year-Old Man

Dislocation is a rare complication of hip resurfacing in young people. This is thought to be due to the stability imposed by a large-diameter head [Stulberg BN, Trier KK, Naughton M, et al. Results and Lessons Learned from a United States Hip Resurfacing Investigational Device Exemption Trial. J Bone Joint Surg Am 2008;90:21]. We report an isolated case 1 week post-Birmingham hip resurfacing in a 44-year-old man without any history of trauma or infection. We note that due to massive periacetabular and femoral neck osteophyte formation and loss of normal bony anatomical landmarks, the version of the acetabular component may have been slightly retroverted. Due to marked narrowing of the femoral neck and head proximally, a cone-shaped proximal femur was found and felt to be unsuitable for direct resurfacing without prior shortening to allow fitting of the appropriate-sized Birmingham hip resurfacing femoral component. This was done successfully, but resulted in slightly reduced femoral neck offset of approximately 10 mm, compared to the native hip. We suspect this reduced offset contributed significantly to the 2 dislocations. We recommend careful preoperative planning and case selection to avoid this complication in similar patients.     

Bilateral Traumatic Anterior Dislocation of the Hip with an Unstable Lumbar Burst Fracture

Traumatic anterior dislocation of the hip is rare. Bilateral traumatic anterior dislocation is an even rarer injury; indeed, only 5 cases have been reported in the English literature. We describe a case of a bilateral traumatic anterior dislocation of the hip and a concomitant unstable lumbar burst fracture following a mechanism of injury distinctly different from other reports.     

Arthroscopic Anterior and Posterior Labral Repair After Traumatic Hip Dislocation: Case Report and Review of the Literature

With the improvements in flexible instrumentation, hip arthroscopy is being increasingly used to treat a variety of hip pathology, including labral tears. However, up to this point, there has not been a case report of an anterior and a posterior labral tear successfully repaired arthroscopically. We present a case report of a 27-year-old male firefighter who presented to our institution with an anterior and posterior labral tear, as well as a cam lesion and loose body, following a traumatic hip dislocation. The purpose of this case report is to illustrate that both anterior and posterior labral tears can be repaired using hip arthroscopy. Anterior and posterior labral tears can be caused by a traumatic hip dislocation, and both can be successfully repaired using arthroscopic techniques.     

Hip Dislocation: Current Treatment Regimens

Dislocation of the hip occurs only with high-energy trauma, and concomitant injuries are common. Early diagnosis and institution of treatment are necessary to obtain the best possible results. Treatment protocols include emergent reduction of the femoral head to reestablish perfusion, postreduction radiography and computed tomography to look for associated fractures and to judge the concentricity of the reduction, stability testing, and early mobilization. Open reduction may be required if a concentric reduction cannot be obtained in a closed manner. Despite appropriate management, posttraumatic arthritis and avascular necrosis may occur, with reported rates as high as 15% to 30%. Patients who sustain a hip dislocation should be made aware of these potential complications at the time of initial treatment.     

Traumatic Anterior Dislocation of the Shoulder: Factors Affecting the Progress of the Traumatic Anterior Dislocation

Background

The aim of this study was to identify the factors that affect the progress of a traumatic anterior dislocation of the shoulder.

Methods

Two hundred and thirty-eight patients (246 shoulders) with a traumatic anterior dislocation were enrolled in this study. The mean age at the time of surgery was 25 years (range, 14 to 47 years). There were 214 men and 24 women.

Results

One hundred and sixty-four shoulders (67%) were younger than 20 years at the time of the first dislocation. Patients younger than 20 years showed a shorter interval of redislocation (p = 0.001) and a higher frequency of dislocation (p = 0.001). Athletic patients experienced their first dislocation at a younger age (p = 0.023) and showed a shorter interval of redislocation (p = 0.001) than their non-athetic counterparts. The incidence of classic and non-classic Bankart lesions was unaffected by age at the time of the first dislocation, interval between the first and second dislocation or the frequency of dislocation. Patients with bony Bankart lesions had a higher frequency of dislocation (p = 0.043).

Conclusions

The age at the time of the first dislocation and athletic activity were related to early redislocation and a high frequency of dislocation. Bony Bankart lesions were observed more often in patients with a higher frequency of dislocation. Early surgical treatment is a good option for young athletic patients with a bony Bankart lesion and a short interval between the first and second dislocation.     

Minimum 10-Year Outcome of One-Stage Total Hip Arthroplasty Without Subtrochanteric Osteotomy Using a Cementless Custom Stem for Crowe III and IV Hip Dislocation

Background

Options for total hip arthroplasty (THA) in high dislocated hips include subtrochanteric osteotomy (STO), high hip center positioning, and 2-stage surgery with progressive lowering using an external fixator before THA. We described the long-term results of 1-stage THA performed without STO, using a cementless customized stem associated if necessary with sequential tenotomies and/or greater trochanteric osteotomy.