Aims. There is compelling evidence for the use of cemented hip hemiarthroplasty for displaced intracapsular hip fractures; however, the risks of cement are well reported and in rare cases may be associated with haemodynamic collapse. It is therefore important to improve our understanding of haemodynamic instability, intraoperative monitoring, and strategies to reduce the risk to patients. Methods. We measured arterial blood pressure using the LiDCOrapid Continuous Non-invasive Arterial Pressure (CNAP) finger cuff during surgery in patients enrolled in the WHiTE 5 trial randomized to cemented or modern uncemented hip hemiarthroplasty at a single recruiting site. We observed the incidence, timing, and magnitude of haemodynamic instability at key stages of the surgical procedure. Results. We obtained measurements from 56 patients, of whom 46 had complete recordings and were used in the analysis. Modest falls in systolic blood pressure (20% to 30%) occurred in four patients (15%) who received a cemented hemiarthroplasty and one patient (5%) in the uncemented group. The fall in blood pressure occurred either within five minutes of cementing or at final hip reduction. We observed concurrent drops in cardiac output (CO) and stroke volume (SV). Conclusion. We observed the presence of two potential periods for haemodynamic instability during hip hemiarthroplasty surgery: the first was within five minutes of cementing the femoral canal and the second after final reduction of the prosthesis (observed in both cemented and uncemented hemiarthroplasty). The falls in blood pressure appeared to be driven by reduced CO and SV. Cite this article: Bone Joint J 2025;107-B(1):103–107

The Pavlik harness (PH) is commonly used to treat infantile dislocated hips. Variability exists in the duration of brace treatment after successful reduction of the dislocated hip. In this study we evaluate the effect of prescribed time in brace on acetabular index (AI) at two years of age using a prospective, international, multicenter database. We retrospectively studied prospectively enrolled infants with at least one dislocated hip that were initially treated with a PH and had a recorded AI at two-year follow-up. Subjects were treated at one of two institutions. Institution 1 used the PH until they observed normal radiographic acetabular development. Institution 2 followed a structured 12-week brace treatment protocol. Hip dislocation was defined as less than 30% femoral head coverage at rest on the pre-treatment ultrasound or IHDI grade III or IV on the pre-treatment radiograph. Fifty-three hips met our inclusion criteria. Hips from Institution 1 were treated with a brace 3x longer than hips from institution 2 (adjusted mean 8.9±1.3 months vs 2.6±0.2 months)(p < 0 .001). Institution 1 had an 88% success rate and institution 2 had an 85% success rate at achieving hip reduction (p=0.735). At 2-year follow-up, we observed no significant difference in AI between Institution 1 (adjusted mean 25.6±0.9˚) compared to Institution 2 (adjusted mean 23.5±0.8˚) (p=0.1). However, 19% of patients from Institution 1 and 44% of patients from Institution 2 were at or below the 50th percentile of previously published age- and sex- matched AI normal data (p=0.049). Also, 27% (7/26) of hips from Institution 1 had significant acetabular dysplasia, compared to a 22% (6/27) from Institution 2 (p=0.691). We found no correlation between age at initiation of bracing and AI at 2-year follow-up (p=0.071). Our findings suggest that prolonged brace treatment does not result in improved acetabular index at age two years. Hips treated at Institution 1 had the same AI at age two years as hips treated at Institution 2, while spending about 1/3 the amount of time in a brace. We recommend close follow-up for all children treated for dislocated hips, as ~1/4 of infants had acetabular index measurements at or above the 90th percentile of normal. Continued follow-up of this prospective cohort will be critical to determine how many children require acetabular procedures during childhood. The PH brace can successfully treat dislocated infant hips, however, prolonged brace treatment was not found to result in improved acetabular development at two-year follow-up

Introduction. The hip hemiarthroplasty in posterior approach is a common surgical procedure at the femoral neck fractures in the elderly patients. However, the postoperative hip precautions to avoid the risk of dislocations are impeditive for early recovery after surgery. We used MIS posterior approach lately known as conjoined tendon preserving posterior (CPP) approach, considering its enhancement of joint stability, and examined the intraoperative and postoperative complications, retrospectively. Methods. We performed hip hemiarthroplasty using CPP approach in 30 patients, and hip hemiarthroplasty using conventional posterior approach in 30 patients, and both group using lateral position with the conventional posterior skin incision. The conjoined tendon (periformis, obturator internus, and superior/inferior gemellus tendon) was preserved and the obturator externus tendon was incised in CPP approach without any hip precautions postoperatively. The conjoined tendon was incised in conventional approach using hip abduction pillow postoperatively. Results. There was no difference between CPP approach group and conventional approach group in the mean age of patients (81.8 years, and 80.3 years, respectively), and in the mean operative time (68.8 minutes, and 64.9 minutes, respectively). In 4 cases of CPP approach, the avulsion fracture at femoral attachment of the conjoined tendon occured during hip reduction manoeuvres. No dislocations occured in both groups in the follow-up period (2 years). Discussion. Lately, the number of hip surgery in muscle sparing approach is increasing. However, in general, MIS approach induces the intraoperative complications, and requires the skillful procedure. The hip reduction manoeuvres would be more difficult in the CPP approach, than in conventional posterior approach, because the preserved conjoined tendon would inhibit hip reduction, considering those avulsion fractures of the femoral attachment. Nevertheless, CPP approach did not require no extended time compared to conventional approach, and no postoperative hip precautions. Due to these results, CPP approach could be a good MIS procedure including early recovery after surgery based on the enhancement of joint stability, excluding the difficulties in hip reduction manoeuvres. We could not show the difference in dislocation rate between two groups, because of small numbers. We are planning to increase the number of patients in the future study

Aims. To monitor the performance of services for developmental dysplasia of the hip (DDH) in Northern Ireland and identify potential improvements to enhance quality of service and plan for the future. Methods. This was a prospective observational study, involving all infants treated for DDH between 2011 and 2017. Children underwent clinical assessment and radiological investigation as per the regional surveillance policy. The regional radiology data was interrogated to quantify the use of ultrasound and ionizing radiation for this population. Results. Evidence-based changes were made to the Northern Ireland screening programme, including an increase in ultrasound scanning capacity and expansion of nurse-led screening clinics. The number of infant hip ultrasound scans increased from 4,788 in 2011, to approximately 7,000 in 2013 and subsequent years. The number of hip radiographs on infants of less than one year of age fell from 7,381 to 2,208 per year. There was a modest increase in the treatment rate from 10.9 to 14.3 per 1,000 live births but there was a significant reduction in the number of closed hip reductions. The incidence of infants diagnosed with DDH after one year of age was 0.30 per 1,000 live births over the entire period. Conclusion. Improving compliance with the regional infant hip screening protocols led to reduction in operative procedures and reduced the number of pelvic radiographs of infants. We conclude that performance monitoring of screening programmes for DDH is essential to provide a quality service. Cite this article: Bone Joint J 2020;102-B(4):495–500

Aims. To determine the likelihood of achieving a successful closed reduction (CR) of a dislocated hip in developmental dysplasia of the hip (DDH) after failed Pavlik harness treatment We report the rate of avascular necrosis (AVN) and the need for further surgical procedures. Methods. Data was obtained from the Northern Ireland DDH database. All children who underwent an attempted closed reduction between 2011 and 2016 were identified. Children with a dislocated hip that failed Pavlik harness treatment were included in the study. Successful closed reduction was defined as a hip that reduced in theatre and remained reduced. Most recent imaging was assessed for the presence of AVN using the Kalamchi and MacEwen classification. Results. There were 644 dislocated hips in 543 patients initially treated in Pavlik harness. In all, 67 hips failed Pavlik harness treatment and proceeded to arthrogram (CR) under general anaesthetic at an average age of 180 days. The number of hips that were deemed reduced in theatre was 46 of the 67 (69%). A total of 11 hips re-dislocated and underwent open reduction, giving a true successful CR rate of 52%. For the total cohort of 67 hips that went to theatre for arthrogram and attempted CR, five (7%) developed clinically significant AVN at an average follow-up of four years and one month, while none of the 35 hips whose reduction was truly successful developed clinically significant AVN. Conclusion. The likelihood of a successful closed reduction of a dislocated hip in the Northern Ireland population, which has failed Pavlik harness treatment, is 52% with a clinically significant AVN rate of 7%. As such, we continue to advocate closed reduction under general anaesthetic for the hip that has failed Pavlik harness. Cite this article: Bone Jt Open 2021;2(8):594–598

The December 2024 Children’s orthopaedics Roundup³⁶⁰ looks at: Establishing best practice for managing idiopathic toe walking in children: a UK consensus; Long-term outcomes of below-elbow casting in paediatric diaphyseal forearm fractures; Residual dysplasia risk persists in developmental dysplasia of the hip patients after Pavlik harness treatment; 3D printing in paediatricorthopaedics: enhancing surgical efficiency and patient outcomes; Pavlik harness treatment for hip dysplasia does not delay motor skill development in children; High prevalence of hip dysplasia found in adolescents with idiopathic scoliosis on routine spine radiographs; Minifragment plates as effective growth modulation for ulnar deformities of the distal radius in children; Long-term success of Chiari pelvic osteotomy in preserving hip function: 30-year follow-up study.

Aims

There is no consensus regarding optimum timing and frequency of ultrasound (US) for monitoring response to Pavlik harness (PH) treatment in developmental dysplasia of the hip (DDH). The purpose of our study was to determine if a limited-frequency hip US assessment had an adverse effect on treatment outcomes compared to traditional comprehensive US monitoring.

Purpose. Following closed or open reduction for developmental dysplasia of the hip (DDH), assessment of reduction is essential. With potentially poor accuracy in confirming reduction, the risk of abnormal hip development and ultimately poor outcome exists if reduction is not achieved. Computed tomography (CT) has been used in recent years to assess reduction. The aim of this study was to compare the accuracy in confirming hip reduction following closed or open reduction in children with DDH, using CT and plain radiographs and to decide whether CT scans improved the assessment of reduction. Methods. We retrospectively reviewed 6 patients treated for DDH at an Academic Hospital. The patients were treated with either closed or open reduction. Post operatively radiographs and CT scans were obtained to assess reduction. Reduction was assessed using Shenton's line, medial joint space, a femoral mid-cervical line through the tri-radiate cartilage and a tri-radiate intersectional line on axial CT. The CT scans were analyzed using Osirix on an Apple Macintosh computer. Results. We were able to obtain measurements in all parameters in only one radiograph, whereas in the CT images all parameters were determined. One patient had radiographs in which no values could be measured. The CT scan however confirmed reduction of that hip. In one patient we assessed a hip as reduced using all the parameters, whereas the tri-radiate intersectional line on axial CT and the Shenton's line on the coronal slice showed that in fact the head was posteriorly subluxed. Conclusion. We conclude that although CT scans did not change our management in this small patient series, CT scans did provide a better means of confirming hip reduction than plain radiographs for patients with DDH following closed or open reduction in a hip spica. NO DISCLOSURES

Purpose. To determine the effect of the femoral head ossific nucleus on the development of avascular necrosis (AVN) after reduction of a dislocated hip. We included consecutive patients treated for a dislocated hip secondary to DDH with either closed or open reduction under the age of 30 months (mean, 9.6□4.8) in this retrospective cohort study. 85 patients or 100 hips were included. Radiographs were analysed for the presence of the ossific nucleus at the time of hip reduction, and for the presence of AVN at 9.2□3.4 years after hip reduction by 3 blinded assessors. There was no significant effect of the femoral head ossific nucleus on the development of osteonecrosis, with 16/40 (40%) cases of osteonecrosis in infants with an ossific nucleus absent compared with 18/60 (30%) in the group with an ossific nucleus (adjusted relative risk = 0.83; 95% CI = 0.38 to 1.83; p=0.65). When only radiographic changes of grade II or worse were considered osteonecrosis, the association remained statistically insignificant (adjusted relative risk = 0.84; 95% CI = 0.35 to 2.00; p=0.69). Conclusion. Our study reports the longest follow-up addressing the question of a potential protective effect of the ossific nucleus on the development of AVN. We could not demonstrate such an effect. Strategies aimed at delaying the treatment of a dislocated hip in the absence of the ossific nucleus cannot be recommended as they will not affect the risk for subsequent AVN

Aims. The purpose of this study was to calculate the dislocation rate following open or closed reduction for developmental dysplasia of the hip (DDH) in our unit. In addition we evaluated the posterior neck line as a method of determining hip relocation and assessed the morphology of the dysplastic acetabulum on single slice CT scan. Method. We retrospectively assessed all patients operated on for either open or closed reduction for DDH between August 2007 and August 2009 and evaluated their notes, CT scans and radiographs. The immediate post-operative dislocation rate was calculated, as was the subsequent re-dislocation rate and late subluxation rate. The acetabular morphology was assessed to determine whether the acetabulae were “S” shaped or “C” shaped. A novel method for confirming hip reduction was also appraised. Results. Seventy-five hips were operated on during the study period. The immediate post-operative dislocation rate was 9.3%. There were no subsequent dislocations in any of the patients in whom CT scans had confirmed adequate initial reduction. Two patients went on to develop late subluxation. 98.6% of dysplastic acetabulae displayed an S shaped acetabulum and 1 hip had a virtually flat acetabulum. The posterior neck line test for dislocation had a 85.7% sensitivity and 96.9% specificity. Conclusions. Immediate post-operative CT scan of the hip is a useful investigation following reduction of the hip for DDH. If it can be established that the hip is reduced on the scan it is unlikely to re-dislocate. The S shape of the acetabulum in DDH is consistently present and is a marker of the dysplastic posterior acetabular wall. The posterior neck line is a reliable measure of hip reduction

Introduction. The standard plane imaging of Graf and the dynamic methods of Harcke are well established methods in assessing hip dysplasia but give limited information in the flexed-abducted treatment position used in the Pavlik harness. The femoral head may sit on the edge of the acetabulum in a flexed position and only reduce when the hips are abducted. This may mean that hips, which reduce when abducted in the Pavlik harness, appear subluxed when scanned in neutral abduction. Harness treatment may thereby be abandoned prematurely due to the failure to confirm reduction. This study identifies ultrasound landmarks on an anterior hip scan which could be used to confirm reduction of the hip in Pavlik Harness. Materials and method. Hips of a newborn piglet were scanned, imaged with magnetic resonance and x-rayed both before and after anatomical dissection. Radiographic markers delineated the position of the tri-radiate cartilage and potential ultrasound landmarks identified to help confirm hip reduction in the flexed-abducted position. Porcine imaging was then compared with that of a human newborn. Results. The porcine model corresponded well to human imaging and we were able to establish a landmark, the ‘Ischial Limb’, which corresponds to the ossification front delineating the posterior ischial edge of the tri-radiate cartilage. This could clearly be seen on anterior hip ultrasound of both the porcine and human hip. This landmark can be used to confirm the hip is reduced by reference to the centre of the femoral head. Discussion and conclusion. We would recommend anterior hip scanning using the ‘Ischial Limb’ as a reference point to confirm hip reduction in Pavlik harness. This simple method is a useful adjunct to conventional ultrasound scanning in the harness treatment of hip instability

The standard plane imaging of Graf and the dynamic methods of Harcke are well established methods in assessing hip dysplasia but give limited information in the flexed-abducted treatment position used in the Pavlik harness. The femoral head may sit on the edge of the acetabulum in a flexed position and only reduce when the hips are abducted. This may mean that hips, which reduce when abducted in the Pavlik harness, appear subluxed when scanned in neutral abduction. Harness treatment may thereby be abandoned prematurely due to the failure to confirm reduction. This study identifies ultrasound landmarks on an anterior hip scan which could be used to confirm reduction of the hip in Pavlik Harness. Hips of a newborn piglet were scanned, imaged with magnetic resonance and x-rayed both before and after anatomical dissection. Radiographic markers delineated the position of the tri-radiate cartilage and potential ultrasound landmarks identified to help confirm hip reduction in the flexed-abducted position. Porcine imaging was then compared with that of a human newborn. The porcine model corresponded well to human imaging and we were able to establish a landmark, the “Ischial Limb”, which corresponds to the ossification front delineating the posterior ischial edge of the tri-radiate cartilage. This could clearly be seen on anterior hip ultrasound of both the porcine and human hip. This landmark can be used to confirm the hip is reduced by reference to the centre of the femoral head. We would recommend anterior hip scanning using the “Ischial Limb” as a reference point to confirm hip reduction in Pavlik harness. This simple method is a useful adjunct to conventional ultrasound scanning in the harness treatment of hip instability

Introduction: Thanks to early ultrasound diagnosis of DDH the number of late diagnosed cases decreased in the last ten years. The surgical intervention because of dislocated hip is also reduced to the few cases a year. We still however have in our practice patients after operative treatment of DDH. One of the methods used for proper hip reduction is transiliacal pelvic osteotomy described by Dega. The aim of this study is to evaluate the late results of one stage procedure with Dega transiliacal pelvic osteotomy in the treatment of DDH with dislocation. Material and Methods: In our Institution 256 dislocated hips were treated surgically by means of open hip reduction, femoral directional osteotomy and Dega’s transiliacal osteotomy. From this group 102 patients (91 female and 11 male), presented 144 operated hips were seen for the final follow-up. The left hip was affected in 45 cases, right in 17, and bilateral in 41 patients. The mean age at the surgery was 23,5 months. Mean follow-up was 19.8 years (minimum 15 years after surgery). Patients were evaluated clinically (Barrett modification of McKay classification) and radiologically using Severin classification. All radiograms from whole period of treatment were collected and evaluated. Results: In 90 hips the final result was classify as very good (57%), good in 36 hips (23%), satisfactory in 10 hips and poor in 8 hips. Radiologically very good result (group IA) was seen in 51 hips, good in 65 hips (group IB, IIA, IIB), satisfactory in 24 hips and poor in 4 hips. It was a good correlation between clinical and radiographic classification. Conclusions : The late results after one stage hip reconstruction with Dega’s transiliacal osteotomy gives a long lasting good results and is recommended for operative treatment of DDH with dislocation

Aims

The objective of this study was to evaluate the clinical and radiological outcomes of patients younger than six months of age with developmental dysplasia of the hip (DDH) managed by either a Pavlik harness or Tübingen hip flexion splint.

Between 1978 and 1997 all newborns in the Austrian province of Tyrol were reviewed regarding hip dysplasia and related surgery. This involved a mean of 8257 births per year (7766 to 8858). Two observation periods were determined: 1978 to 1982 (clinical examination alone) and 1993 to 1997 (clinical examination and universal ultrasound screening). A retrospective analysis compared the number and cost of interventions due to hip dysplasia in three patient age groups: A, 0 to < 1.5 years; B, ≥ 1.5 to < 15 years; and C, ≥ 15 to < 35 years. In group A, there was a decrease in hip reductions from a mean of 25.2 (. sd. 2.8) to 7.0 (. sd. 1.4) cases per year. In group B, operative procedures decreased from a mean of 17.8 (. sd. 3.5) to 2.6 (. sd. 1.3) per year. There was a 75.9% decrease in the total number of interventions for groups A and B. An increase of €57 000 in the overall cost per year for the second period (1993 to 1997) was seen, mainly due to the screening programme. However, there was a marked reduction in costs of all surgical and non-surgical treatments for dysplastic hips from €410 000 (1978 to 1982) to €117 000 (1993 to 1997). We believe the small proportional increase in costs of the universal ultrasound screening programme is justifiable as it was associated with a reduction in the number of non-surgical and surgical interventions. We therefore recommend universal hip ultrasound screening for neonates

Aims

Open reduction in developmental dysplasia of the hip (DDH) is regularly performed despite screening programmes, due to failure of treatment or late presentation. A protocol for open reduction of DDH has been refined through collaboration between surgical, anaesthetic, and nursing teams to allow same day discharge. The objective of this study was to determine the safety and feasibility of performing open reduction of DDH as a day case.

Purpose of Study. To evaluate the results of using external fixation to stabilise femoral derotation osteotomy involved in DDH surgery. Methods and results. A retrospective analysis was performed on 44 patients undergoing 48 femoral osteotomies for DDH surgery between the years 2001 and 2009 by a single surgeon (senior author MC). The external fixator was used either during the primary procedure involving femoral shortening to aid in hip reduction (4 patients) or to correct femoral malrotation in a reduced hip as a secondary procedure(40 patients). As the external fixator frame was within the hip spica it was not a cause of concern to the parents or the child. There was no evidence of any pin tract infection and all patients eventually progressed to satisfactory bony union. One patient had delayed union which was treated successfully with conservative management and one patient had a malunion requiring a further osteotomy and extended treatment with the external fixator. Conclusion. External fixation is a viable alternative for the traditional internal fixation used for femoral osteotomy involving DDH Surgery. Our study has shown that it produces satisfactory results with minimal complications. Apart from minimising tissue scarring in the muscle and subcutaneous planes, it gives a cosmetically better scar. If there is further need for revision surgery it provides healthy tissue planes for dissection. Furthermore it eliminates the need for additional surgery required for removal of plates

Purpose of the study. To report the difference in the rates of avascular necrosis (AVN) of the femoral head following change in the hip abduction angle in the hip spica. Methods. Up until 2002, following closed and medial open reduction of the dislocated hip, the joint was immobilised in a 90° of flexion, 60° of abduction and 10-20° of internal rotation hip spica. The practice was changed after 2002 to 45° of hip abduction in the spica with other parameters remaining same. We audited the rates of radiologic AVN in these two groups of children. Group A, before 2002, had 20 children and in group B, after 2002 till Aug 2007, had 53 children. AVN was quantified on 2 year radiograph by the classification described by Salter and noted its progression on serial radiographs. Results. Twelve children (60%) in group A had radiographic evidence of AVN in the first two years after the procedure compared to 26 children (49%) in group B. This was usually in the form of delayed appearance of the ossific nucleus and delayed development of already appeared nucleus compared to other side. However, on serial radiographs when these patients were followed, at their latest follow-up, the femoral have developed symmetrically in all but 4 patients (20%) in Group A and 6 patients (11.3%) in Group B. Conclusion. Children treated in hip spica after closed or medial open procedure developed transient avascular changes in their femoral head which recovered in most patients. This transient ischemia is further reduced by decreasing the amount of hip abduction angle without compromising the hip reduction achieved

Purpose of the study: From 1999 to 2004, 16 patients (25 hips) aged 2–9 years (average 5±3 years) were treated for spastic hips. The patients were diplegic (n=19 hips, 76%) and tetraplegic (n=6 hips, 24%). Pure pyramidal cerebral palsy patients with no history of seizure. Material and methods: The surgical plan was: femoral osteotomy, periacetabular osteotomy (San Diego), tenotomy of the adductors and psoas, anterior hip reduction as needed. Pain, range of abduction, Reimmer’s index and acetabular index were noted. Results: In the diplegic patients, outcome was good (70%), fair (23%), poor (7%). In tetraplegic patients, outcome was good (20%), fair (20%), poor (60%). Complications were avascular necrosis (n=1) and decubitus lesions (n=2)

Aims

When the present study was initiated, we changed the treatment for late-detected developmental dislocation of the hip (DDH) from several weeks of skin traction to markedly shorter traction time. The aim of this prospective study was to evaluate this change, with special emphasis on the rate of stable closed reduction according to patient age, the development of the acetabulum, and the outcome at skeletal maturity.