Devendra Chouhan

Functional outcome of neglected perilunate dislocations treated with open reduction and internal fixation

Introduction: Management of neglected perilunate dislocations is controversial. The various procedures such as open reduction and internal fixation (ORIF), proximal row carpectomy, lunate excision, and wrist arthrodesis have been advocated. The aim of our study was to evaluate the functional outcome of neglected perilunate dislocations managed by ORIF. Materials and Methods: Over a period of 10 years (1996 to 2006), 14 patients with neglected perilunate dislocations (undiagnosed or untreated for 6 weeks or more) were managed by ORIF. Six patients had dorsal trans-scaphoid perilunate dislocation, 6 patients had volar lunate dislocation while the remaining two had a dorsal perilunate dislocation The results were evaluated by clinical scoring system of Cooney et al. Results: The average followup was 4.1 years (range 2-12 years). All except one of the patients operated earlier than 5 months had good results. Of the four patients operated after 5 months, two had a fair result while two had a poor outcome. Chondral damage to the capitate was noted intraoperatively in both the cases with poor outcomes. The two patients were found to have avascular necrosis (AVN) of the lunate; however, functional outcome was fair in both, and both were able to return to their profession. Conclusion: We observed favorable functional results of ORIF in neglected perilunate dislocations up to 5 months after injury. The development of AVN or midcarpal arthritis was not a major disabling factor as long as stability of wrist has been restored. Beyond 5 months, an alternative surgical procedure such as proximal row carpectomy should be contemplated as results of ORIF have not been good uniformly.

A new method of measuring acetabular cup anteversion on simulated radiographs

PurposeOptimal positioning of acetabular components is crucial for maintaining stability of THA. Postoperative assessment of acetabular anteversion is a vital but difficult task. Various methods have been devised with good results for measuring anteversion on plain radiographs but these methods are either too complicated or require special objects like scientific calculators, special protectors, tables, etc. A new simplified method of measuring anteversion on plain radiographs was created based on basic geometry.MethodsAnteversion of acetabular components was estimated on computer generated images of the acetabular cup by our method and compared with two previously established methods of Liaw and Pradhan. Measurement was done at 400 different positions of acetabular cup and compared with actual values. Another analysis was done after adding the femoral head to the acetabular component, thus obscuring some of the acetabular rim.ResultsMean and standard deviation of error for our method was 0.77° ± 0.75° as compared to 0.93° ± 0.86° and 0.72° ± 0.68° for the methods of Liaw and Pardhan, respectively, with no significant differences from actual values. Maximal errors for our method, Liaw’s and Pradhan’s method were 3°, 4°, and 2.91°, respectively. On analysis, after the adding femoral head, there was a significant error of measurement with Liaw’s method, while our method as well as Pardhan’s remained accurate. All methods showed high inter- and intraobserver reliability.ConclusionOur new simplified method of measuring acetabular anteversion on plain radiographs is acceptable in comparision to other established methods and requires only routinely used goniometer and calliper.

Significant Incidence of Extra-Articular Tibia Vara Affects Radiological Outcome of Total Knee Arthroplasty

Purpose To identify and quantify the presence of extra-articular tibia vara that might influence the mechanical axis alignment after total knee arthroplasty (TKA). Materials and Methods A total of 48 TKAs in 30 osteoarthritic Indian patients were prospectively evaluated. The hip-knee-ankle angle (HKA), joint line convergence angle, and varus angulation at the femur and tibia were measured from the preoperative and postoperative standing hip-to-ankle radiographs. Four different methods were used to measure the varus angulation at the tibia: metaphyseo-diaphyseal angle (MDA), the angle between the anatomical axis and mechanical axis of the tibia, the angle between the proximal third and distal third of tibia and the angle between the proximal half and distal half of tibia. Results Extra-articular tibia vara quantified using MDA had the most positive correlation with HKA. Receiver operating characteristic plotting showed that MDA of >4° predicts abnormal postoperative HKA. Twenty-eight out of 48 knees had MDA of >4°, and 78.6% of these had postoperative HKA under-correction and 21.4% had less than ideal tibial component position. Conclusions A significant inherent extra-articular varus angulation best measured using MDA exists in the proximal tibia in osteoarthritic Indian patients undergoing TKA. MDA of >4° is associated with abnormal postoperative HKA. Computer navigation may be useful for achieving ideal correction in such cases.

Curettage and reconstruction by the sandwich technique for giant cell tumours around the knee

Purpose. To evaluate outcomes of 36 patients who underwent curettage, use of phenol, and reconstruction using the sandwich technique for giant cell tumour (GCT) of bone around the knee. Methods. 22 women and 14 men aged 19 to 46 (mean, 29.6) years underwent intralesional curettage, use of phenol, and reconstruction using the sandwich technique for GCT of the proximal tibia (n=23) or distal femur (n=13). Two of the cases were recurrences. Two, 18, and 16 tumours were classified as grade I, grade II, and grade III, respectively. Five of the grade III tumours were associated with an extra-articular pathological fracture. Patients underwent intralesional curettage, use of phenol, and reconstruction with allograft, gel foam, and cement (the sandwich technique). Pathological fractures were fixed with plates. Functional outcome was evaluated using the Musculoskeletal Tumor Society (MSTS) score. Results. The mean follow-up period was 5 (2.5–11) years. The mean MSTS score was 27.7 out of 30 (standard deviation, 3; range, 16–30). One patient with a grade III tumour in the proximal tibia had a recurrence detected elsewhere after 3 years. Her MSTS score at 2 years was 26. No patient had malignant transformation. Conclusion. Intralesional curettage, use of phenol, and reconstruction with allograft, gel foam, and cement (the sandwich technique) for GCT of bone achieved good functional outcome and a low recurrence rate.

Atraumatic Heterotopic Ossification of Iliopsoas Muscle: A Case Report

Introduction Heterotopic ossification, a benign condition, results from normal lamellar bone formation in an abnormal location. Although the pathogenesis of this condition remains largely unknown, several causative factors have been identified since its description in children with myositis ossificans progressiva in 1692 by Patin. The most commonly observed cause is trauma: either a single episode of severe trauma or repeated microtraumas. Although it is a self limiting condition which often resolves spontaneously, it can cause significant morbidity in the form of significant restriction in movements, especially when it occurs close to joints. Heterotopic ossification commonly occurs around the hip joint, where it most often involves the abductor muscles. Involvement of the iliopsoas is uncommon, very few cases having been reported. All previously reported cases have been due to trauma or intramuscular hemorrhage. Moreover, few of these reported cases involved the psoas without involvement of the hip joint; those that did had a radically different presentation. Some recent reports have documented involvement of the psoas muscle after posterior spinal fusion surgery, especially when bone morphogenetic proteins have been used. We present here a case of heterotopic ossification of the iliopsoas muscle without antecedent trauma or any other known cause. We further discuss and review published reports on this subject.

Management of neglected ACL avulsion fractures: a case series and systematic review

INTRODUCTION Neglected tibial eminence avulsion fractures of the anterior cruciate ligament (ACL) are uncommonly seen in modern times, but are fairly common due to a missed diagnosis/mismanagement in developing countries. OBJECTIVES To determine the outcomes after open reduction and internal fixation of late presenting ACL avulsion fractures, and to review the literature for similar cases, in an attempt to evaluate the ideal surgical management in this unique scenario. STUDY DESIGN Retrospective observational study and systematic review MATERIALS: The study included 10 male and 2 female cases (mean age 29.9 years). Patients were assessed for the pre-operative knee range-of-motion (ROM), flexion deformity and stability; functional assessment was conducted using the Lysholm scale, both pre and post-operatively. Open reduction and internal fixation with two partially threaded screws (via a mini anterior approach) was performed in all 12 cases. All patients were clinically followed up for a minimum duration of 12 months. We searched PubMed, Embase and Cochrane databases from the period of inception to January 15, 2017 for similar case series/reports involving management of chronic/neglected ACL avulsion fractures and systematically reviewed these studies following standard PRISMA guidelines. RESULTS The median duration of presentation after injury was 12 months (range 3 to 312 months; mean 45.3 months). The mean follow-up duration was 24.1 months (range 12-48 months). All patients achieved normal knee extension except one patient who had a residual 5° flexion contracture. On physical examination, Lachman and pivot-shift tests were negative in all but 1 patient. No case required ACL reconstruction, and the fractures united radiologically within 12 weeks; all patients regained former activity levels. DISCUSSION Eleven published studies, mainly case reports, reported on the management of chronic/neglected ACL avulsion fractures. Arthroscopic suture/wire fixation, arthroscopic debridement of avulsed fragment and open reduction, internal fixation (ORIF) with screws are the described techniques for this uncommon entity. However, anatomic reduction of ACL avulsion fractures is difficult arthroscopically as crater depth assessment and repositioning of the avulsed fragment become a problem; the avulsed fragment may also hypertrophy, and some contractures in ACL may develop. A mini-open procedure does not add to the morbidity, overcomes reduction obstacles and allows easy fixation with screws, and can be done even in centers that do not have arthroscopic experience. The key point is accurate reduction and rigid fixation, ensuring no impingement on full extension CONCLUSIONS: Mini-open fixation allows accurate, anatomic reduction and stable fixation with screws, and should be the preferred method of fixation for late presenting ACL avulsion fractures; embedding the fragment deep into the crater or size reduction are key to preventing extension deficits.

Examination of Elbow

Elbow joint is trocho-ginglymoid joint between distal end of humerus, proximal ulna and radius. It consist of three articulation ulno-humeral, radio-humeral and proximal radio-ulnar joint. The trochoid (pivoting) components consist of the radiohumeral and proximalradioulnar joints, which allow for axial rotation of the forearm. The ginglymus (hinge) component is created by the ulnohumeral joint, allowing for flexion and extension

Neglected, semimembranosus osteochondral avulsion fracture of the posteromedial tibial plateau

Semimembranosus avulsion fracture is infrequently reported and is easy to miss on plain radiographs; the mechanism of injury is highly controversial. Initial reports linked it to anterior cruciate ligament and medial meniscal tears. We report an osteochondral semimembranosus avulsion fracture of the posteromedial tibial plateau with associated posterior cruciate ligament rupture. Also described is a novel surgical fixation technique for such osteochondral fractures where the surgical exposure is limited due to the obliquity of the fracture line resulting in a greater involvement of the articular cartilage than the small bony component. The fixation technique described may be used for osteochondral fractures where the application of a conventional compression screw may not be feasible.

Multiple PRP Injection vs Single PRP Injection in Early OA Knee: An Experimental Study in a Guinea Pig Early Knee OA Model

Platelet-rich plasma (PRP) has emerged as the forerunner among disease-modifying treatment options of early osteoarthritis (OA) of knee.1 However, there is currently no consensus on the number and frequency of PRP injections, and their dosing schedules are widely debated. A few clinical studies2,3 have shown that multiple injections of PRP are better than single injection; however, the biological basis of this effect is not yet clear.

Gastrocnemius raphe split approach for complex proximal tibia fractures—Applicability and advantages

Posterior column fractures of the tibial plateau have been considered problem injury as many authors reported poor outcome. Commonly used surgical approaches have limitations in addressing complex fractures involving the posterior column, leading to malreduction and subsequent leading to chronic posteroinferior subluxation, arthritis and chronic pain. There is thus a need for a surgical approach, which can provide adequate exposure to both quadrant of posterior column, in addition to allowing sufficient space for fracture manipulation and implant placement. The authors have evaluated the applicability of the posterior midline gastrocnemius raphe split approach to deal with coomplex posterior column fragment in tibial plateau fractures. A midline gastrocnemius splitting approach was used alone or along with other approaches in 22 patients with tibial plateau fractures involving the posterior column. The mean age of the patients was 36 years and the female to male ratio was 1:6 (3 and 18). At an average follow up of 12 months (Range 6-14 months), Radiological evidence of union was noted at an average 13 weeks (Range, 10-15weeks) and no loss of reduction was seen at follow-up. All cases had regained painless knee flexion that averaged 120°. The midline gastrocnemius splitting approach is a versatile approach, which allows adequate exposure on either side of the posterior tibial plateau. This can easily combined with other approaches, where the anteromedial and anterolateral coloumn or associated ligament injury demand attention.