Diagnostic Accuracy of Artificial Intelligence-Based Algorithms in Automated Detection of Neck of Femur Fracture on a Plain Radiograph: A Systematic Review and Meta-analysis

Objectives

To evaluate the diagnostic accuracy of artificial intelligence-based algorithms in identifying neck of femur fracture on a plain radiograph.

Design

Systematic review and meta-analysis.

Data sources

PubMed, Web of science, Scopus, IEEE, and the Science direct databases were searched from inception to 30 July 2023.

Eligibility criteria for study selection

Eligible article types were descriptive, analytical, or trial studies published in the English language providing data on the utility of artificial intelligence (AI) based algorithms in the detection of the neck of the femur (NOF) fracture on plain X-ray.

Main outcome measures

The prespecified primary outcome was to calculate the sensitivity, specificity, accuracy, Youden index, and positive and negative likelihood ratios. Two teams of reviewers (each consisting of two members) extracted the data from available information in each study. The risk of bias was assessed using a mix of the CLAIM (the Checklist for AI in Medical Imaging) and QUADAS-2 (A Revised Tool for the Quality Assessment of Diagnostic Accuracy Studies) criteria.

Results

Of the 437 articles retrieved, five were eligible for inclusion, and the pooled sensitivity of AIs in diagnosing the fracture NOF was 85%, with a specificity of 87%. For all studies, the pooled Youden index (YI) was 0.73. The average positive likelihood ratio (PLR) was 19.88, whereas the negative likelihood ratio (NLR) was 0.17. The random effects model showed an overall odds of 1.16 (0.84-1.61) in the forest plot, comparing the AI system with those of human diagnosis. The overall heterogeneity of the studies was marginal (I2 = 51%). The CLAIM criteria for risk of bias assessment had an overall >70% score.

Conclusion

Artificial intelligence (AI)-based algorithms can be used as a diagnostic adjunct, benefiting clinicians by taking less time and effort in neck of the femur (NOF) fracture diagnosis.

Study registration

PROSPERO CRD42022375449.

Supplementary Information

The online version contains supplementary material available at 10.1007/s43465-024-01130-6.

Comparison of acute outcomes from elective total hip replacements and after fragility femoral neck fractures in nonagenarians

BACKGROUND

Hip hemiarthroplasty has traditionally been used to treat displaced femoral neck fractures in older, frailer patients whilst total hip replacements (THR) have been reserved for younger and fitter patients. However, not all elderly patients are frail, and some may be able to tolerate and benefit from an acute THR. Nonagenarians are a particularly heterogenous subpopulation of the elderly, with varying degrees of independence. Since THRs are performed electively as a routine treatment for osteoarthritis in the elderly, its safety is well established in the older patient. The aim of this study was to compare the safety of emergency THR to elective THR in nonagenarians.

METHODS

A retrospective 10-year cohort study was conducted using data submitted to the National Hip Fracture Database (NHFD) across three hospitals in one large NHS Trust. Data was collected from 126 nonagenarians who underwent THRs between 1st January 2010 - 31st December 2020 and was categorised into emergency THR and elective THR groups. Mortality rates were compared between the two groups. Secondary outcomes were also compared including postoperative complications (dislocations, revision surgeries, and periprosthetic fracture), length of stay in hospital, and discharge destination.

RESULTS

There was no significant difference in mortality between the two groups, with 1-year mortality rates of 11.4% and 12.1% reported for emergency and elective patients respectively (p = 0.848). There were no significant differences in postoperative complication rate and discharge destination. Patients who had emergency THR spent 5.56 days longer in hospital compared to elective patients (p = 0.015).

CONCLUSION

There is no increased risk of 1-year mortality in emergency THR compared to elective THR, in a nonagenarian population. Therefore, nonagenarians presenting with a hip fracture who would have been considered for a THR if presenting on an elective basis should not be precluded from an emergency THR on safety grounds.

TRIAL REGISTRATION

Not necessary as this was deemed not to be clinical research, and was considered to be a service evaluation.

Osteosynthesis, hemiarthroplasty, total hip arthroplasty in hip fractures: All I need to know

Recent data from the UK's National Hip Fracture Database (NHFD) demonstrate an upward trajectory in the incidence of hip fractures, a trend which is expected to persist. In 2023 alone, the NHFD reported 72,160 cases, underscoring the prevalence of these injuries. These fractures are associated with significant morbidity, mortality, and economic costs. National guidelines for the surgical management of these fractures are established, although the implementation of total hip arthroplasty (THA) as a primary treatment modality varies. This review offers a narrative synthesis of contemporary literature on hip fractures, focusing on epidemiology, classification systems, and treatment options, with a particular emphasis on the outcomes of THA.

Effectiveness of exercise rehabilitation interventions on depressive symptoms in older adults post hip fracture: a systematic review and meta-analysis

This study determines the effectiveness of exercise rehabilitation interventions on depressive symptoms in older adults after hip fracture. Ovid MEDLINE, Embase, Global Health, APAPsych, CENTRAL, CIHAHL, PEDro and Open Grey were searched from database inception to June 10, 2022 for definitive, pilot or feasibility randomised controlled trials of rehabilitation interventions (versus any comparator) which reported depressive symptoms among older adults post hip fracture. Nonrandomised trials and those not published in English were excluded. Selection, quality appraisal (Cochrane Risk of Bias 2) and extraction in duplicate. Results were synthesised narratively and with meta-analysis (Hedge's g for intervention effect, I2 for heterogeneity). Eight trials (1146 participants) were included. Interventions were predominantly face-to-face exercise rehabilitation (range three to 56 sessions) at home versus usual care. Three trials were assigned overall low risk of bias, three some concerns and two high risk. The pooled effect of rehabilitation on depressive symptoms at intervention end favoured the intervention group (Hedges's g -0.43; 95% CI: -0.87, 0.01; four trials). Three trials demonstrated no between group difference following adjustment for baseline depressive symptoms. One trial found lower odds of depression when the intervention additionally included falls prevention, nutrition consultation and depression management. There is a potential benefit of exercise rehabilitation interventions on depressive symptoms after hip fracture. A mechanism for benefit may relate to baseline symptom severity, exercise frequency, frequency of health professional contacts, addition of a psychological component or of the quality of the underlying trials. To appropriately inform clinical guidelines, further appropriately powered trials with follow-up are warranted. TRIAL REGISTRATION: ClinicalTrials.gov Identifier: CRD42022342099.

What is the best method of fixation for minimally displaced subcapital neck of femur fractures? A systematic review

BACKGROUND

Femoral neck fractures are a common cause of morbidity and mortality in the community. Minimally displaced subcapital necks of femoral fractures are usually managed with internal fixation, although there is debate as to which method is superior. This systematic review aimed to compare the outcomes of different fixation methods in the management of this common fracture.

METHODS

This systematic review was conducted in accordance with PRISMA statement guidelines. The databases searched were MEDLINE (Ovid), Cochrane Central Register of Controlled Trials, and EMBASE (Ovid). The study quality and risk of bias were assessed using the Newcastle-Ottawa Quality Assessment Scale, and relevant data were extracted and synthesised.

RESULTS

Nine articles met the inclusion criteria. A total of 819 patients were included in this study. Eight of the nine studies were case series, and one was a randomised control trial. The mean risk of bias was 7.4/9 for non-randomised articles. The fixation methods used in the included studies were dynamic hip screw (DHS), cannulated screws, Smith-Peterson nail, hooknail, Moore's pins, and Knowle's pins. DHS was found to be a superior method of fixation and was supported by a clinical trial. It has high rates of union (99 %), low rates of avascular necrosis (<1 %), and low rates of fixation failure (<1 %).

CONCLUSIONS

Based on the available data, DHS appears to be the superior method of fixation for the minimally displaced subcapital neck of femoral fractures. Given the general low level of evidence currently available, additional clinical trials are needed in this area.

Comparing outcomes of total hip arthroplasty versus hemiarthroplasty in neck of femur fracture patients: an Australian registry study

PURPOSE

To determine discharge outcomes of displaced subcapital NOF patients who were from home, with intact pre-operative cognition, ASA 1 or 2 and independent walkers treated with either THA or hemiarthroplasty.

METHODS

A retrospective registry study was performed using data from the Australia and New Zealand Hip Fracture Registry (ANZHFR). Institutional ethics approval was obtained prior to commencement. Hip fracture registry records between 1st January 2016 and 31st January 2020 were reviewed.

RESULTS

A total of 930 patients with complete records were identified and included. There were 602 THA and 328 hemiarthroplasty patients. Using multivariate analysis, pre-operative factors associated with THA include younger age (OR = 0.90 for every year older, p < 0.001), females (p = 0.043), private admissions (OR = 1.62, p = 0.028) and receiving pre-operative geriatric assessment (OR = 1.89, p = 0.002). Delay to theatre due to not being fit for surgery was associated with not receiving THA (OR = 0.21, p < 0.001). THA resulted in a shorter total hospital length of stay (MD = 7.24, p < 0.001), higher likelihood of being discharged home (OR = 1.88, p < 0.001) and lower likelihood of being discharged to a residential aged care facility (OR = 0.32, p = 0.019).

CONCLUSION

Displaced subcapital NOF patients who were admitted from home, had intact pre-operative cognition, ASA 1 or 2, independent walkers and had THAs, had shorter total hospital length of stay, were more likely to be discharged home directly and less likely to end up in residential aged care facilities compared to those undergoing hemiarthroplasty.

Perioperative administration of tranexamic acid in hip fracture surgery (The PATHS study): national audit of current practice

INTRODUCTION

Neck of femur fractures (NOFF) are associated with significant morbidity and mortality, exacerbated by anaemia. Evidence indicates tranexamic acid (TXA) administration in NOFF surgery reduces blood loss and transfusion requirements, without increasing complications. The aim of this study was to establish current TXA administration practice in patients undergoing surgery for NOFF in the UK.

METHODS

We conducted a multicentre prospective study within the UK over a two-week period in March 2019. Pre-, intra- and postoperative data were collected locally and analysed centrally.

RESULTS

Data for 917 patients were submitted from 66 institutions. Of those eligible, 48.0% received TXA perioperatively. Administration rates varied from 0 to 100%. Significantly greater numbers undergoing arthroplasty received TXA (57.6%) compared with internal fixation (38.4%, p<0.01). Some 15.2% of institutions had a protocol for TXA use in NOFF. Patients treated in these units were significantly more likely to receive TXA (86.7%) than those who were not (41.2% p<0.01). Of those receiving TXA, 92.3% were given 1g intravenously (IV) at anaesthetic administration.

CONCLUSIONS

Despite supportive evidence for its use, a wide variation in the administration of TXA between hospitals and procedures has been demonstrated. Administration rates were higher for arthroplasty than for fixation procedures. Most centres do not have a protocol guiding TXA administration. We recommend administration of 1g IV TXA perioperatively for patients undergoing NOFF surgery, where not contraindicated, unless future randomised controlled trials support an alternative regimen. We recommend units include their own locally agreed TXA policy within a written protocol for the care of NOFF patients.

The impact of the frequency, duration and type of physiotherapy on discharge after hip fracture surgery: a secondary analysis of UK national linked audit data

Additional physiotherapy in the first postoperative week was associated with fewer days to discharge after hip fracture surgery. A 7-day physiotherapy service in the first postoperative week should be considered as a new key performance indicator in evaluating the quality of care for patients admitted with a hip fracture.

INTRODUCTION

To examine the association between physiotherapy in the first week after hip fracture surgery and discharge from acute hospital.

METHODS

We linked data from the UK Physiotherapy Hip Fracture Sprint Audit to hospital records for 5395 patients with hip fracture in May and June 2017. We estimated the association between the number of days patients received physiotherapy in the first postoperative week; its overall duration (< 2 h, ≥ 2 h; 30-min increment) and type (mobilisation alone, mobilisation and exercise) and the cumulative probability of discharge from acute hospital over 30 days, using proportional odds regression adjusted for confounders and the competing risk of death.

RESULTS

The crude and adjusted odds ratios of discharge were 1.24 (95% CI 1.19-1.30) and 1.26 (95% CI 1.19-1.33) for an additional day of physiotherapy, 1.34 (95% CI 1.18-1.52) and 1.33 (95% CI 1.12-1.57) for ≥ 2 versus < 2 h physiotherapy, and 1.11 (95% CI 1.08-1.15) and 1.10 (95% CI 1.05-1.15) for an additional 30-min of physiotherapy. Physiotherapy type was not associated with discharge.

CONCLUSION

We report an association between physiotherapy and discharge after hip fracture. An average UK hospital admitting 375 patients annually may save 456 bed-days if current provision increased so all patients with hip fracture received physiotherapy on 6-7 days in the first postoperative week. A 7-day physiotherapy service totalling at least 2 h in the first postoperative week may be considered a key performance indicator of acute care quality after hip fracture.

Hip and distal femur fracture outcomes over three successive UK lockdown periods during the COVID-19 pandemic: what have we learnt? : a single-centre retrospective cohort study

Aims

This study assessed the impact of COVID-19 on hip and distal femur fracture patient outcomes across three successive UK lockdown periods over one year.

Methods

A single-centre retrospective cohort study was performed at an acute NHS Trust. Hip and distal femur fracture patients admitted within the first month from each of the three starting dates of each national lockdown were included and compared to a control group in March 2019. Data were collected as per the best practice tariff outcomes including additional outcomes as required. Data collection included COVID-19 status, time to theatre, 30-day mortality, presence of acute kidney injury (AKI) and pneumonia, and do not attempt cardiopulmonary resuscitation (DNACPR) status. Data were analyzed using an independent-samples t-test or chi-squared test with Fisher’s exact test where applicable. A p-value of < 0.05 was considered statistically significant.

Results

A total of 95 patients during the pandemic were included and 20 were COVID-positive. Patients experienced a statistically significant increase in time to theatre in Lockdown 1 compared to 2019 (p = 0.039) with a decrease with successive lockdown periods by Lockdown 3. The 30-day mortality increased from 8.8% in 2019 to 10.0% to 14.8% in all lockdown periods. COVID-positive patient mortality was 30.0% (p = 0.063, odds ratio (OR) = 4.43 vs 2019). The rates of AKI and pneumonia experienced were higher for patients during the pandemic. The highest rates were experienced in COVID-positive patients, with 45.0% of patients with AKI versus 27.0% in 2019 (p = 0.38, OR = 1.80), and 50.0% of patients diagnosed with pneumonia versus 16.2% in 2019 (p = 0.0012, OR = 5.17). The percentage of patients with a DNACPR increased from 30.0% in 2019 to 60.7% by Lockdown 3 (p = 0.034, OR = 3.61).

Conclusion

COVID-positive hip and distal femur fracture patients are at a higher risk of mortality due to AKI and pneumonia. Patient outcomes have improved with successive lockdowns to pre-pandemic levels.

Cite this article: Bone Jt Open 2021;2(12):1017–1026.

Blood transfusions and hip fracture mortality - A retrospective cohort study

BACKGROUND

Hip fractures are associated with serious morbidity and mortality. Low haemoglobin at presentation has been shown to be associated with increased mortality in hip fracture patients. This comorbid patient group commonly receives packed red cell blood transfusions during their hospital admission, the impact of which is less clear.

AIMS AND OBJECTIVES

We aim to assess the rate, appropriateness and impact of blood transfusions on one-year mortality in hip fracture patients. We also aim to assess the impact of patients taking anticoagulant medications at presentation on the rates of blood transfusions in this patient group.

METHODS

A retrospective cohort study of 324 consecutive hip fracture patients. Data was collected from the national hip fracture database, electronic patient records and PACS.

RESULTS

75 patients received a blood transfusion. Receiving a blood transfusion increased absolute risk of one-year mortality by 2.466 (p < 0.05). Adjusted for age, sex, comorbidities, residence prior to admission and time from presentation to surgery increased the risk of one-year mortality was 2.790 (p < 0.05).28% of patients who went on to receive a transfusion had a haemoglobin of less than 100 g/L at presentation. 94.6% of transfused patients had a pre-transfusion haemoglobin of less than 90 g/L. There was no increased risk of requiring a blood transfusion if anticoagulant medication was being taken at presentation.

CONCLUSION

Receiving a blood transfusion during an admission for hip fracture carried an increased risk of one-year mortality of almost two and a half times. With appropriate preoperative optimisation, taking an anticoagulant medication at presentation did not increase the risk of requiring a transfusion. Most blood transfusions were administered appropriately using thresholds. Just over a quarter of patients who received a transfusion had an admission haemoglobin of less than 100 g/L, showing it as a poor predictor of blood transfusion requirement during admission.

The influence of hospital-level variables on hip fracture outcomes

AIMS

The aim of this study was to determine the impact of hospital-level service characteristics on hip fracture outcomes and quality of care processes measures.

METHODS

This was a retrospective analysis of publicly available audit data obtained from the National Hip Fracture Database (NHFD) 2018 benchmark summary and Facilities Survey. Data extraction was performed using a dedicated proforma to identify relevant hospital-level care process and outcome variables for inclusion. The primary outcome measure was adjusted 30-day mortality rate. A random forest-based multivariate imputation by chained equation (MICE) algorithm was used for missing value imputation. Univariable analysis for each hospital level factor was performed using a combination of Tobit regression, Siegal non-parametric linear regression, and Mann-Whitney U test analyses, dependent on the data type. In all analyses, a p-value < 0.05 denoted statistical significance.

RESULTS

Analyses included 176 hospitals, with a median of 366 hip fracture cases per year (interquartile range (IQR) 280 to 457). Aggregated data from 66,578 patients were included. The only identified hospital-level variable associated with the primary outcome of 30-day mortality was hip fracture trial involvement (no trial involvement: median 6.3%; trial involvement: median 5.7%; p = 0.039). Significant key associations were also identified between prompt surgery and presence of dedicated hip fracture sessions; reduced acute length of stay and both a higher number of hip fracture cases per year and more dedicated hip fracture operating lists; Best Practice Tariff attainment and greater number of hip fracture cases per year, more dedicated hip fracture operating lists, presence of a dedicated hip fracture ward, and hip fracture trial involvement.

CONCLUSION

Exploratory analyses have identified that improved outcomes in hip fracture may be associated with hospital-level service characteristics, such as hip fracture research trial involvement, larger hip fracture volumes, and the use of theatre lists dedicated to hip fracture surgery. Further research using patient level data is warranted to corroborate these findings. Cite this article: Bone Joint J 2021;103-B(10):1627-1632.

The 30-day survival and recovery after hip fracture by timing of mobilization and dementia : a UK database study

AIMS

The aim of this study to compare 30-day survival and recovery of mobility between patients mobilized early (on the day of, or day after surgery for a hip fracture) and patients mobilized late (two days or more after surgery), and to determine whether the presence of dementia influences the association between the timing of mobilization, 30-day survival, and recovery.

METHODS

Analysis of the National Hip Fracture Database and hospital records for 126,897 patients aged ≥ 60 years who underwent surgery for a hip fracture in England and Wales between 2014 and 2016. Using logistic regression, we adjusted for covariates with a propensity score to estimate the association between the timing of mobilization, survival, and recovery of walking ability.

RESULTS

A total of 99,667 patients (79%) mobilized early. Among those mobilized early compared to those mobilized late, the weighted odds ratio of survival was 1.92 (95% confidence interval (CI) 1.80 to 2.05), of recovering outdoor ambulation was 1.25 (95% CI 1.03 to 1.51), and of recovering indoor ambulation was 1.53 (95% CI 1.32 to 1.78) by 30 days. The weighted probabilities of survival at 30 days post-admission were 95.9% (95% CI 95.7% to 96.0%) for those who mobilized early and 92.4% (95% CI 92.0% to 92.8%) for those who mobilized late. The weighted probabilities of regaining the ability to walk outdoors were 9.7% (95% CI 9.2% to 10.2%) and indoors 81.2% (95% CI 80.0% to 82.4%), for those who mobilized early, and 7.9% (95% CI 6.6% to 9.2%) and 73.8% (95% CI 71.3% to 76.2%), respectively, for those who mobilized late. Patients with dementia were less likely to mobilize early despite observed associations with survival and ambulation recovery for those with and without dementia.

CONCLUSION

Early mobilization is associated with survival and recovery for patients (with and without dementia) after hip fracture. Early mobilization should be incorporated as a measured indicator of quality. Reasons for failure to mobilize early should also be recorded to inform quality improvement initiatives. Cite this article: Bone Joint J 2021;103-B(7):1317-1324.

The association between surgical fixation of hip fractures within 24 hours and mortality : a systematic review and meta-analysis

AIMS

The aim of this study was to assess the effect of time to surgical intervention from admission on mortality and morbidity for patients with hip fractures.

METHODS

MEDLINE and Embase were searched from inception to June 2020. Reference lists were manually assessed to identify additional papers. Primary comparative research studies that recruited patients aged over 60 years, with non-pathological primary proximal femoral fractures that were treated surgically, were included. Studies that did not include a group operated on within 24 hours or which reported time to surgery in calendar days were excluded. Two investigators extracted data on study characteristics, methods, and outcomes. The pre-defined primary outcome was 30-day mortality. Secondary outcomes were complications and mortality at other time points. Relative risks (RRs) with 95% confidence intervals (CIs) were aggregated and were grouped by study-level characteristics.

RESULTS

This review included 46 studies (January 1991 to June 2020), comprising 521,857 hip fractures with 64,047 postoperative deaths. No randomized controlled trials were eligible for inclusion. In a pooled analysis of 15 studies, RR of mortality at 30 days comparing time to surgery < 24 hours with > 24 hours was 0.86 (95% CI 0.82 to 0.91; I 2 = 69%; 95% CI 50% to 81%; p-value for heterogeneity < 0.001). The association was stronger in observational studies that did not adjust for confounders than in those that adjusted for multiple covariates. In a pooled analysis of six studies, the RR of mortality at 30 days comparing time to surgery < 24 hours with 24 to 36 hours was 0.87 (95% CI 0.81 to 0.93; I 2 = 65%; 95% CI 16% to 85%; p-value for heterogeneity = 0.014).

CONCLUSION

This meta-analysis indicates reduced mortality for patients operated within 24 hours compared with those operated on beyond 24 hours or within 24 to 36 hours. Where resources allow and there is no specific reversible contraindication to early surgery, we recommend that hip fractures should be surgically treated within 24 hours. Cite this article: Bone Joint J 2021;103-B(7):1176-1186.

Social deprivation predicts adverse health outcomes after hospital admission with hip fracture in England

We found social deprivation to be associated with higher mortality in the year following hip fracture among men and women aged 60 years and older in England. In those who did survive, deprivation was associated with longer hospital stays and greater risk of subsequent emergency readmission particularly for patients with dementia.

INTRODUCTION

Social deprivation predicts a range of adverse health outcomes; however, its impact on outcomes following hip fracture is not established. We examined the effect of area-level social deprivation on outcomes following hospital admission for hip fracture in England.

METHODS

We used English Hospital Episodes Statistics linked to the National Hip Fracture Database (April 2011-March 2015) and Office for National Statistics mortality database, to identify patients aged 60+ years admitted with hip fracture. Deprivation was measured using Index of Multiple Deprivation quintiles; Q1-least deprived; Q5-most deprived, and outcomes by mortality over 1-year, length-of-stay in NHS acute and rehabilitation hospitals ('superspell'), and emergency 30-day readmission.

RESULTS

We identified 218,907 admissions with an index hip fracture (mean age 82.8 [standard deviation, SD 8.4] years; 72.6% female). Each quintile of deprivation was associated with greater mortality; age-adjusted 30-day mortality odds ratio, OR 1.30 [95% confidence interval, CI: 1.24, 1.37], p < 0.001, equating to on average 1038 fewer deaths/year among those who are least deprived (Q1 versus 2-5). Similarly, at 365 days, those most deprived had 24% higher mortality (age-sex-comorbidity-adjusted OR:1.24 [1.20, 1.28], p < 0.001; Q5 versus Q1). Among survivors, mean superspell was longer in the most versus least deprived (Q5:24.4 [SD 21.7] days, Q1:23.3 [SD 22.1], p < 0.001). Readmission was more common in those most versus least deprived (age-sex-comorbidity-adjusted OR 1.27 [1.22, 1.32], p < 0.001).

CONCLUSION

Greater deprivation is associated with reduced survival at all timepoints in the year following hip fracture. Among survivors, hospital stay is increased as is readmission risk. The extent to which configuration of English hospital services, rather than patient case-mix, explains these apparent health inequalities remains to be determined.

IMPACT of COVID-19 on hip fracture services: A global survey by the International Multicentre Project Auditing COVID-19 in Trauma & Orthopaedics

Introduction

The Coronavirus Disease 2019 (COVID-19) pandemic resulted in major disruption to hip fracture services. This frail patient group requires specialist care, and disruption to services is likely to result in increases in morbidity, mortality and long-term healthcare costs.

Aims

To assess disruption to hip fracture services during the COVID-19 pandemic.

Methods

A questionnaire was designed for completion by a senior clinician or service manager in each participating unit between April–September 2020. The survey was incorporated into existing national-level audits in Germany (n = 71), Scotland (n = 16), and Ireland (n = 16). Responses from a further 82 units in 11 nations were obtained via an online survey.

Results

There were 185 units from 14 countries that returned the survey. 102/160 (63.7%) units reported a worsening of overall service quality, which was attributed predominantly to staff redistribution, reallocation of inpatient areas, and reduced access to surgical facilities. There was a high rate of redeployment of staff to other services: two thirds lost specialist orthopaedic nurses, a third lost orthogeriatrics services, and a quarter lost physiotherapists. Reallocation of inpatient areas resulted in patients being managed by non-specialised teams in generic wards, which increased transit of patients and staff between clinical areas. There was reduced operating department access, with 74/160 (46.2%) centres reporting a >50% reduction. Reduced theatre efficiency was reported by 135/160 (84.4%) and was attributed to staff and resource redistribution, longer anaesthetic and transfer times, and delays for preoperative COVID-19 testing and using personal protective equipment (PPE).

Conclusion

Hip fracture services were disrupted during the COVID-19 pandemic and this may have a sustained impact on health and social care. Protection of hip fracture services is essential to ensure satisfactory outcomes for this vulnerable patient group.

Relationships between the Bone Expression of Alzheimer's Disease-Related Genes, Bone Remodelling Genes and Cortical Bone Structure in Neck of Femur Fracture

Neck of femur (NOF) fracture is a prevalent fracture type amongst the ageing and osteoporotic populations, commonly requiring total hip replacement (THR) surgery. Increased fracture risk has also been associated with Alzheimer's disease (AD) in the aged. Here, we sought to identify possible relationships between the pathologies of osteoporosis and dementia by analysing bone expression of neurotropic or dementia-related genes in patients undergoing THR surgery for NOF fracture. Femoral bone samples from 66 NOF patients were examined for expression of the neurotropic genes amyloid precursor protein (APP), APP-like protein-2 (APLP2), Beta-Secretase Cleaving Enzyme-1 (BACE1) and nerve growth factor (NGF). Relationships were examined between the expression of these and of bone regulatory genes, systemic factors and bone structural parameters ascertained from plain radiographs. We found strong relative levels of expression and positive correlations between APP, APLP2, BACE1 and NGF levels in NOF bone. Significant correlations were found between APP, APLP2, BACE1 mRNA levels and bone remodelling genes TRAP, RANKL, and the RANKL:OPG mRNA ratio, indicative of potential functional relationships at the time of fracture. Analysis of the whole cohort, as well as non-dementia (n = 53) and dementia (n = 13) subgroups, revealed structural relationships between APP and APLP2 mRNA expression and lateral femoral cortical thickness. These findings suggest that osteoporosis and AD may share common molecular pathways of disease progression, perhaps explaining the common risk factors associated with these diseases. The observation of a potential pathologic role for AD-related genes in bone may also provide alternative treatment strategies for osteoporosis and fracture prevention.

Mortality in hip fractures: Stratifying the risk of operative delay and quantifying the benefit of early mobilisation

INTRODUCTION

Early mortality following hip fracture surgery remains a significant issue with a much studied, multifactorial aetiology. This study designed to test the variables affecting 30 day mortality in a socially deprived cohort against national models, and secondarily aimed to uncover and quantify new risk factors.

METHODS

This was a single centre retrospective study based on National Hip Fracture Database (NHFD) data for 3176 hip fracture patients from 1st May 2008 to December 31st 2017. Data was condensed into a single anonymised workbook and logistic regression used to analyse associations with 30 day mortality. Firstly, the 6 casemix variables used by the NHFD were modelled. Secondarily, a new optimised model based on our data was created.

RESULTS

Gross mortality was 11.1% since May 2008 (344/3074). There were 1978 patients in our cohort with sufficient data to run the NHFD casemix model. Overall, this proved fair with a similar area under ROC curve to nationally (0.75 vs. 0.76), although the Odds Ratios (OR) of individual variables differed. The optimised casemix model suggested two powerful prognostic indicators for 30 day mortality, namely delay to theatre for clinical reasons (OR =3.98, p-value=0.02) and whether the patient was mobilised day one post op (OR=0.21, p-value=0.00). Delay to theatre for non clinical reasons conveyed only a marginal and statistically insignificant increase in risk (OR=1.15, p-value=0.77).

CONCLUSION

This study has confirmed the NHFD casemix adjusted model is a fair barometer for units treating a socially deprived cohort. It also has shown a clear differentiation between risk conveyed by delay to theatre for clinical reasons and suggests delay for non-clinical reasons, although clearly not desired, may not have a significant effect on death rate. Finally, it both amplifies and prompts further investigation into the potential benefit of early mobilisation.

Increased perioperative mortality for femoral neck fractures in patients with coronavirus disease 2019 (COVID-19): experience from the United Kingdom during the first wave of the pandemic

BACKGROUND

The coronavirus disease 19 (COVID-19) pandemic has presented modern healthcare with an unprecedented challenge. At the peak of the pandemic, trauma and orthopaedic services at our institutions undertook internal restructuring, diverting resources to frontline medical care. Consequently, we sought to assess the impact on the elderly and comorbid patients presenting with femoral neck fractures, with a particular focus on 30-day mortality, length of stay, multidisciplinary team involvement and departmental structuring.

METHOD

A retrospective analysis of patients presenting with femoral neck fractures at three separate West London NHS Trusts was undertaken between March 11, 2020, to April 30, 2020. Length of stay, 30-day mortality and adherence to parameters constituting the best care evidence-based practice tariffs were compared between severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) positive and negative patients. A similar comparison was also conducted between our cohort and the equivalent period in 2018 using data from the National Hip Fracture Database.

RESULTS

A total of 68 patients presenting with femoral neck fractures were identified, mean age 81 (range 38-98), 73% female. There were 10 confirmed/suspected cases of COVID-19 on admission and a further seven confirmed as inpatients. The 30-day mortality within our cohort was 11.76% compared to 6% nationally in 2018 (p = 0.045). Orthogeriatric reviews occurred within 72 h in 71% of cases compared to 88% in the equivalent 2018 period. Within the cohort, mean length of stay was 17.13 days (SD 5.6, range 8-27 days) for SARS-CoV-2 positive patients compared to 10 days (SD 8.7, range 1-53 days) for negative patients (p < 0.05). Thirty-two patients (47%) required increased packages of care on discharge or rehabilitation.

CONCLUSIONS

The increase in 30-day mortality for SARS-CoV-2 positive patients presenting with femoral neck fractures is multifactorial, resulting from a combination of the direct effects of COVID-19 pneumonia as well as changes to the delivery of orthopaedic services. The provision of multidisciplinary care was directly affected by staff redeployment, particularly reorganisation of orthogeriatric services and lack of continuity of ward based clinical care. Our experiences have re-directed efforts towards the management of theatre teams, patient services and staffing, should we be faced with either a resurgence of COVID-19 or a future pandemic.

Gunshot Wounds to The Hip

Gunshot wounds to the hip region are likely to cause complex peritrochanteric fracture. The fracture patterns are often highly comminuted and accompanied by injuries to local structures and abdominal viscera. Our case series analyses 25 orthopaedic procedures performed. The overall union rate for primary fixation was 66%. Two patients underwent revision surgery for failed primary fixation. Two cases where fixation had failed were revised to total hip replacement successfully. These types of injuries present a formidable challenge. Preservation of the femoral head should be prioritised to avoid arthroplasty. Long-term follow-up is necessary in assessing the success of these procedures.

How Accurate is the Use of Contralateral Implant Size as a Template in Bilateral Hemiarthroplasty?

PURPOSE

Accurately predicting implant size for hemiarthroplasties offers an important contribution to theatre efficiency and patients' intraoperative care. However, pre-operative sizing using templating of implants in hip fracture patients requiring a hemiarthroplasty is often difficult due to non-standard radiographs, absence of a calibration marker, poor marker placement, variable patient position, and in many institutions a lack of templating facilities. In patients who have previously undergone a hemiarthroplasty on the contralateral side, surgeons can use the contralateral implant size for pre-operative planning purposes. However, the accuracy of doing this has not previously been reported. The aim of this study was to investigate the reliability of using an in situ contralateral implant as a predictor of implant size on the contralateral side.

METHODS

A retrospective review of our local neck of femur fracture (NOF) database was undertaken to identify patients who had bilateral hip hemiarthroplasty. Operative records were reviewed to establish the size of prostheses used at operation. Correlation, agreement, and reliability analysis were performed using the least squares, Bland-Altman plot, and intra-class correlation coefficient (ICC) methods, respectively.

RESULTS

Operative records were identified for 45 patients who had bilateral hemiarthroplasties. There was a difference in implant size used in 58% of cases. Of these 77% required a larger implant on the right. Implant sizes were within 1 mm of the contralateral side in 78% and within 2 mm in 91% of patients. However, in 9% of patients, there was a discrepancy greater than 2 mm with some cases having up to 6 mm discrepancy. Correlation coefficient was 0.83 and the ICC 0.90.

CONCLUSIONS

The findings in this study indicated that using the size of a contralateral implant can be used as a reliable indicator of head size in cases of bilateral hemiarthroplasty. However, the surgeon should remain cautious as there is a one in ten chance of there being a 3 mm or more difference in implant size.

Hip fractures

In the UK the incidence of hip fractures is nearly 76 000 cases per year, with the vast majority of these fractures occurring in patients over the age of 70 years. Most patients who sustain a hip fracture will have significant comorbidities and up to 40% will have cognitive impairment. For patients, sustaining a hip fracture can potentially be a devastating event. This article provides an overview of the presentation, assessment and management of hip fractures for core surgical, acute care common stem and emergency medicine trainees.

The prognostic implication of perioperative cardiac enzyme elevation in patients with fractured neck of femur: A systematic review and meta-analysis

BACKGROUND

Neck of Femur (NOF) fractures are a common injury in comorbid elderly patients which are associated with increased rates of morbidity and mortality following fracture. Because of their injury, patients can experience reductions in quality of life and independent living leading to transfer to nursing home or dependent levels of care. Numerous factors are associated with either complications or reductions in survival following fractured NOF. From the VISION cohort there is evidence that troponin elevation in the post-operative period following a diverse range of non-cardiac surgical procedures may lead to an increased risk of mortality in the absence of classical ischaemic or cardiac symptoms. The aim of this systematic review and meta-analysis is to validate the utility of perioperative troponin elevation as a prognostic indicator for mortality and cardiac morbidity in those with fractured NOF.

METHODS

The PRISMA guidelines for the conduct of meta-analyses were followed. An electronic search was conducted of the EMBASE, MEDLINE (Ovid) and Biosis databases. Studies were included for analysis if they stratified outcomes by perioperative troponin elevation in surgically managed fractured NOF and reported sufficient data on troponin elevation and mortality following surgery. Primary and secondary outcomes assessed were all-cause post-operative mortality and a composite measure of cardiac complications (myocardial infarction, cardiac failure and arrhythmia) respectively.

RESULTS

Eleven studies met inclusion criteria giving a total of 1363 patients. Overall, 497 patients (36.5%) experienced an elevation in troponin levels following surgery. Perioperative troponin elevation was significantly associated with all-cause mortality (OR 2.6; 95% CI 1.5 - 4.6; p <0.001) and cardiac complications (OR 7.4; 95% CI 3.5 - 15.8; p <0.001). Patient factors significantly associated with troponin elevation included pre-existing coronary artery disease, cardiac failure, hypertension, previous stroke and previous myocardial infarction.

CONCLUSION

Perioperative troponin elevation is significantly associated with increased mortality and post-operative cardiac complications following fractured NOF and may be a useful prognostic indicator in these patients. Future research should further stratify patients by the magnitude of troponin elevation and further refine the risk factors.

X-rays and scans can fail to differentiate hip pathology from lumbar spinal stenosis: Two case reports

Background:

Occasionally, hip pathologies may present alone or combined with lumbar spine pathology, especially lumbar stenosis. Although the history and clinical examination may help differentiate between the two, hip X-rays alone without accompanying magnetic resonance imaging (MRI) studies may prove unreliable.

Case Descriptions:

Case 1 – A 72-year-old male presented with the sudden onset of severe back and left posterior thigh pain. Straight leg raising test was positive at 70° (right) and 60° (left), and he had left lower extremity numbness and weakness. The lumbar MRI showed L5-S1 spinal stenosis. Although X-rays of both hips were negative, the MRI showed bilateral femoral neck fractures. He underwent screw fixation of the hip fractures and later underwent endoscopic decompression of the spinal stenosis. Case 2 – A 35-year-old male presented with low backache and right hip pain of 1 month’s duration. The neurological examination was normal, except for positive straight leg raising bilaterally at 60°. The spine MRI was normal. However, despite negative X-ray of both hips, the hip MRI revealed avascular necrosis (AVN) of both femoral heads requiring subsequent orthopedic management.

Conclusion:

Hip pathology may mimic lumbar spinal stenosis. In the two cases presented, plain X-rays failed to document hip fractures (case 1) and AVN (case 2), respectively, both of which were later diagnosed on MRI studies.

A waste of resource?

AIM

We aim to assess post-operative CRP serum values in a cohort of patients who underwent surgical treatment for neck of femur fracture (NOF#), and whether CRP is a valid tool for the assessment of these patients post-operatively.

STUDY DESIGN AND METHODS

Retrospective analysis was carried out on all NOF#'s admitted for surgical fixation between August 2015 and July 2016 in a district general hospital. Primary analysis included serum CRP levels until day 7 post-operatively, with secondary analysis of any documented evidence of post-operative complications (medical and surgical) within 30 days post-operatively.

RESULTS

A total of 365 patients were surgically treated for NOF#'s over the study period. CRP serum levels peaked over the first two days post-operatively to median (IQ range) of 226 mg/L (158-299 mg/L), decreasing to 67 mg/L (45.5-104 mg/L) by day 7 post-operatively. 116 patients had documented post-operative complications within 30 daysof operation. CRP levels in patients with and without complications showed no statistical significance in day-1, day-2 and day-3 post-operatively. However, a significant difference was demonstrated on day-4 (p = 0.017), day-5 (p = 0.003), day-6 (p = 0.02) and day-7 (p = 0.031).

CONCLUSIONS

During the first three days of the postoperative period we cannot recommend routine CRP serum blood test monitoring in NOF# patients, as it is not diagnostic in the acute inflammatory phase for medical or surgical complications.

The independent patient factors that affect length of stay following hip fractures

Introduction Management of hip fractures has evolved over recent years to drive better outcomes including length of hospital stay. We aimed to identify and quantify the effect that patient factors influence acute hospital and total health service length of stay. Methods A retrospective observational study based on National Hip Fracture Database data was conducted from 1 January 2014 to 31 December 2015. A multiple regression analysis of 330 patients was carried out to determine independent factors that affect acute hospital and total hospital length of stay. Results American Society of Anesthesiologists (ASA) grade 3 or above, Abbreviated Mental Test Score (AMTS) less than 8 and poor mobility status were independent factors, significantly increasing length of hospital stay in our population. Acute hospital length of stay can be predicted as 8.9 days longer when AMTS less than 8, 4.2 days longer when ASA grade was 3 or above and 20.4 days longer when unable to mobilise unaided (compared with independently mobile individuals). Other factors including total hip replacement compared with hemiarthroplasty did not independently affect length of stay. Conclusions Our analysis in a representative and generalisable population illustrates the importance of identifying these three patient characteristics in hip fracture patients. When recognised and targeted with orthogeriatric support, the length of hospital stay for these patients can be reduced and overall hip fracture care improved. Screening on admission for ASA grade, AMTS and mobility status allows prediction of length of stay and tailoring of care to match needs.

A Protocol for the Management of the Inpatient Fracture Neck of Femur is Required

Falls within a hospital environment are a major cause of morbidity and may even lead to mortality. Pathways for patients suffering a Fractured Neck of Femur (FNOF) in the community are well established following the development of the Blue Book, BOAST guidelines and National Hip Fracture Database (NHFD). However, there is no such agreed pathway for patients suffering FNOF within a hospital environment. Such patients have been demonstrated to have a higher risk of delays in medical optimisation, delays in operative management, and mortality. There is, therefore, a need to create a nationally agreed guideline for the care of the “inpatient FNOF” as this is an important subgroup of patients. This article highlights this issue as well as advising medical staff on how to identify a potential FNOF within a hospital environment in order to ensure prompt management of a vulnerable group of patients.

Does a fixed offset hemiarthroplasty implant have any effect on pain and function in patients with a femoral neck fracture?

INTRODUCTION

Hip hemiarthroplasty is the commonest operation performed for a displaced intracapsular hip fracture in the UK. A variety of implants including fixed offset prostheses are utilised. There has been no study investigating the relationship between restoration of femoral offset and long term pain and function. This study aims to evaluate long-term pain and functional outcomes of a fixed offset hemiarthroplasty implant (the Exeter trauma system).

PATIENTS AND METHODS

All patients were retrospectively reviewed from a prospectively collected database. In all, 338 patients met the criteria for evaluation. Patients native offset were calculated from the contralateral hip. Pain and functional outcomes were assessed using validated outcome measures.

RESULTS

There were no differences found across a range of natural offsets for long-term pain and functional recovery.

CONCLUSION

Our experience with the Exeter trauma system suggests that a 40 mm offset implant is a good standard offset to use.

Osteoarthritis is associated with increased failure of proximal femoral fracture fixation

PURPOSE

The purpose of this study was to evaluate whether the presence of hip osteoarthritis at the time of hip fracture increases treatment failure rates when using either a sliding hip screw (SHS) or proximal femoral nail (PFN) for fracture fixation.

METHODS

A retrospective study of a consecutive series of 455 women and 148 men (median age, 83.8 years) treated with SHS or PFN was performed. Osteoarthritis was evaluated based on pre-operative radiographs using the Kellgren and Lawrence grading system. Treatment failure, which was defined as non-union, avascular necrosis, backing out of the implant, cut out of the proximal screws, peri-prosthetic fracture, implant breakage, or conversion to hemi- or total hip arthroplasty, was evaluated for a follow-up period of four to seven years. Optimal placement of the implant (tip-apex distance (TAD) and 3-point fixation) and the effects of age, sex, the quality of reduction, implant type, fracture stability, fracture type, and time to failure were considered confounders of the relationship between failure and osteoarthritis (OA).

RESULTS

Among the 32 cases (5.3%) of treatment failure, 12 (2%) showed evidence of osteoarthritis. After controlling for age, sex, the quality of reduction, implant type, fracture stability, fracture type, and TAD, osteoarthritis was associated a greater than threefold increase in treatment failure compared with that of patients without pre-operative evidence of osteoarthritis (OR, 3.26; 95% CI, 1.4-7.65; P = 0.006).

CONCLUSIONS

After adjusting for potential confounding factors, radiographic evidence of hip osteoarthritis at the time of hip fracture increases the incidence of treatment failure.

The effect of social deprivation on hip fracture incidence in England has not changed over 14 years: an analysis of the English Hospital Episodes Statistics (2001-2015)

Deprivation predicts increased hip fracture risk. Over 14 years, hip fracture incidence increased among men with persisting inequalities. Among women, inequalities in incidence were less pronounced; whilst incidence decreased overall, this improvement was seen marginally less in women from the most deprived areas. Hip fracture prevention programmes have not reduced inequalities.

PURPOSE

Deprivation is associated with increased hip fracture risk. We examined the effect of area-level deprivation on hip fracture incidence in England over 14 years to determine whether inequalities have changed over time.

METHODS

We used English Hospital Episodes Statistics (2001/2002-2014/2015) to identify hip fractures in adults aged 50+ years and mid-year population estimates (2001-2014) from the Office for National Statistics. The Index of Multiple Deprivation measured local area deprivation. We calculated age-adjusted incidence rate ratios (IRR) for hip fracture, stratified by gender and deprivation quintiles.

RESULTS

Over 14 years, we identified 747,369 hospital admissions with an index hip fracture; the number increased from 50,640 in 2001 to 55,092 in 2014; the proportion of men increased from 22.2% to 29.6%. Whereas incidence rates decreased in women (annual reduction 1.1%), they increased in men (annual increase 0.6%) (interaction p < 0.001). Incidence was higher in more deprived areas, particularly among men: IRR most vs. least deprived quintile 1.50 [95% CI 1.48, 1.52] in men, 1.17 [1.16, 1.18] in women. Age-standardised incidence increased for men across all deprivation quintiles from 2001 to 2014. Among women, incidence fell more among those least compared to most deprived (year by deprivation interaction p < 0.001).

CONCLUSIONS

Deprivation is a stronger relative predictor of hip fracture incidence in men than in women. However, given their higher hip fracture incidence, the absolute burden of deprivation on hip fractures is greater in women. Despite public health efforts to prevent hip fractures, the health inequality gap for hip fracture incidence has not narrowed for men, and marginally widened among women.

Hip fractures in young adults: a retrospective cross-sectional study of characteristics, injury mechanism, risk factors, complications and follow-up

This study characterises risk factors, complications and follow-up of minimal trauma hip fractures in young adults, adding to limited information examining the management framework. This group have severe systemic disease and significant risk of post-operative complications and subsequent fractures. Improved medical referral pathways enable management of osteoporosis and comorbid diseases.

AIMS

There is a paucity of literature examining minimal trauma hip fractures in young adults, despite extensive management guidelines for older patients. This study aims to characterise risk factors, complications and follow-up of hip fractures to guide management pathways.

METHODS

This is a retrospective study of patients presenting with hip fracture to a single institution from 2009 to 2015. Hip fractures were identified using ICD-10 codes and clinical information documented from medical records. Patients were categorised into minimal trauma (MTF) and high-energy fracture (HEF) groups based on mechanism of injury.

RESULTS

Of 2512 patients admitted with hip fracture, 2.5% (n = 62) were aged 15-49 years. Two patients were excluded with pathological fractures, and seven were excluded with no recorded mechanism of injury. MTF occurred in 43 patients and 10 sustained HEF. These groups had similar demographics, fracture locations and treatments. The MTF group had higher American Society of Anaesthesiologists scores (MTF 2.44 ± 0.9; HEF 1.43 ± 0.5; p = 0.025) and higher rates of chronic endocrine disease (MTF 34.9%; HEF 0%; p = 0.046). Rates of post-operative surgical (MTF 24.0%; HEF 12.5%) and medical complications (MTF 27.8%; HEF 12.5%) were high in MTF patients. Subsequent fractures occurred in five (13.9%) MTF patients during the study period compared with none in the HEF group. Only 16 (44.4%) of the MTF patients were referred to endocrine care.

CONCLUSION

Young adults with MTF of the hip have more severe systemic disease and are at risk of post-operative complications and subsequent fractures. Referral of patients to endocrine care is recommended to manage osteoporosis and comorbid diseases.

There is no weekend effect in hip fracture surgery - A comprehensive analysis of outcomes

BACKGROUND

Previous studies have shown that some patient groups suffer adverse outcomes if they are acutely admitted to hospital over a weekend. We aimed to investigate this 'weekend effect' at our centre in patients presenting with a hip fracture.

METHODS

Consecutive patients undergoing acute hip fracture surgery were identified from a prospective database. Patient demographics, co-morbidities, fracture type, admission blood parameters were examined. Outcomes analysed included 30-day, 90-day and 1-year mortality as well as length of stay, re-operations and delay to surgery. The data were analysed with regards to day of admission and day of surgery separately.

RESULTS

A total of 1326 patients were included, of which 368 patients were admitted over a weekend and 411 patients had their operation over a weekend. Overall 30-day mortality was 7.6% (101 patients), whilst the 90-day and 1-year mortalities were 15.3% and 26.8% (203 and 356 patients). There were no significant differences in any of the outcomes based on the day of admission or the day of surgery. Multivariate analysis for 30-day mortality demonstrated the following variables to be significant predictors: admission urea levels (hazard ratio (HR) 1.042, p = 0.027), age (HR 1.058, p < 0.001), admission source (HR 1.428, p < 0.001), surgical delay >48 h (HR 1.853, p = 0.004), male gender (HR 1.967, p = 0.003), previous stroke (HR 2.261, p = 0.038), acute chest infection (4.240, p < 0.001) and chronic liver disease (HR 4.581, p = 0.014).

CONCLUSION

This data suggests that there is no significant weekend effect in hip fracture surgery and mortality is affected by patient co-morbidities and delay to surgery.

Neck of femur fractures in the elderly: Does every hour to surgery count?

OBJECTIVES

To determine if early surgery before 12h confers a survival or length of stay benefit for patients with neck of femur (NOF) fractures.

DESIGN

Retrospective review of prospectively collected data.

SETTING

District general hospital.

PATIENTS

1913 patients aged over 60 admitted with a fractured NOF who underwent surgery between 2011 and 2015. Mean age was 83.9 years. 73.7% were female.

INTERVENTION

Patients had surgery for fractured NOF with data collected on demographics, mortality and length of stay.

MAIN OUTCOME MEASUREMENTS

Data collected included gender, age, ASA grade, fracture anatomy, surgery, time to surgery, days spent in acute hospital and rehabilitation settings and 30-day mortality. Statistical analysis was used to identify independent predictors of mortality and length of stay.

RESULTS

30-day mortality was 6.1% and the mean hospitalisation time was 13±11.3days for the acute hospital and 20.2±17.2days for the trust. Operations were performed at a mean of 23.8±14.8h after presentation. Age, gender, ASA grade and type of fracture were independent predictors of either mortality or length of stay. Timing of surgery had an association with mortality but this only reached statistical significance at 24h. In line with previous studies we analysed time to surgery in 12h blocks. We also used logistic regression, recognizing time as a continuous variable, which revealed that every hour of delay to surgery increased the mortality risk by 1.8%.

CONCLUSIONS

While every hour of delay increased mortality risk, the association with mortality only became statistically significant when delaying over 24h. This supports a pragmatic approach, with surgery as soon as medically possible without a race to theatre.

LEVEL OF EVIDENCE

Level III retrospective cohort study.

Non-parallel screw fixation for femoral neck fractures in young adults

INTRODUCTION

Current literature shows divergence of views regarding screws positioning in femoral neck fractures fixation. The goal of this study is to evaluate the efficiency of divergent screw fixation for fracture neck of femur (NOF).

METHODS

The study was conducted at an academic Level 1 Trauma Center. This is a retrospective study conducted from October 2013 to October 2016. The study included 41 patients (33 males, 8 females) suffering from fracture NOF who were fixed using BDSF technique (26 within 24 h. & 15 after 24 h.). The average age was 41.5 y (23-49 y). According to Garden classification; 17 patients (41.5%) were type 4, 24 patients (58.5%) were type 3. According to Pauwel's classification; 8 cases (19.5%) were type III, 25 cases (61%) were type II & 8 cases (19.5%) were Type I. Thirty-six cases (88%) were trans-cervical, 4 Sub-capital (9.5%) and 1 (2.5%) Basi-cervical. Six patients had comminution at the fracture site. We evaluated radiographic outcomes of union, femoral neck shortening, screws back-out & femoral head avascular necrosis (AVN). We also evaluated functional outcome using the Harris hip score. Follow-up was 24 months on average (ranging from 20 to 29 months).

RESULTS

One patient was lost during the follow up, the remaining 40 cases gave the following results regarding union: 38 united (within 3-4 months), 2 patients were un-united & one of them developed AVN. Twenty-seven patients (71%) had femoral neck shortening <5 mm, 8 patients (21%) had shortening 5-10 & 3 patients (8%) had shortening >10 mm. Shortening was on average 3 mm (0-15). Screws back-out distance was on average 4 mm (0 to16). Patients with mild femoral neck shortening had Harris hip score of 96 on average (92-100), those with moderate shortening had a score of 75 on average (72-79), those with severe shortening had a score of 62 on average (56-68).

CONCLUSION

The Authors believes this method provides better union rate & less incidence of femoral neck shortening than that of the conventional inverted triangle screws configuration reported in literature. However multi-center studies & long term follow-up is needed to fully evaluate this method.

An analysis of postoperative hemoglobin levels in patients with a fractured neck of femur

Objectives

The aim of this study was to analyze the changes in hemoglobin level and to determine a suitable timeline for post-operative hemoglobin monitoring in patients undergoing fixation of femoral neck fracture.

Patients and methods

Patients who underwent either dynamic hip screw (DHS) fixation (n = 74, mean age: 80 years) or hip hemiarthroplasty (n = 104, mean age: 84 years) for femoral neck fracture were included into the study. The hemoglobin level of the patients was monitored perioperatively.

Results

Analysis found a statistically and clinically significant mean drop in hemoglobin of 31.1 g/L over time from pre-operatively (D0) to day-5 post-operatively (p < 0.001), with significant reductions from D0 to day-1 and day-1 to day-2 (p < 0.001). At each post-operative time point, DHS patients had lower hemoglobin values over hemiarthroplasty patients (p = 0.046).

Conclusion

The decrease in hemoglobin in the first 24-h post-operative period (D0 to day-1) is an underestimation of the ultimate lowest value in hemoglobin found at day-2. Relying on the day-1 hemoglobin could be detrimental to patient care. We propose a method of predicting patients likely to be transfused, and recommend a protocol for patients undergoing femoral neck fracture surgery to standardize postoperative hemoglobin monitoring.

Level of evidence

Level IV Prognostic study.

Hip fracture litigation: A 10-year review of NHS Litigation Authority data and the effect of national guidelines

We present a review evaluating all litigation claims relating to hip fractures made in a 10-year period between 2005 and 2015. Data was obtained from the NHS Litigation Authority through a freedom of information request. All claims relating to hip fractures were reviewed. During the period analysed, 216 claims were made, of which 148 were successful (69%). The total cost of settling these claims was in excess of £5 million. The introduction of a best-practice tariff by the Department of Health in 2010 was designed to improve the quality of care for hip fracture patients. This was followed by guidance from the National Institute for Health and Clinical Excellence in 2011 and the British Orthopaedic Association in 2012. We analysed claims submitted before and after these guidelines were introduced and no significant difference in the number of claims was noted. The most common cause for litigation was a delay in diagnosis, which accounted for 86 claims in total (40%). Despite the presence of these guidelines and targets, there has not been a significant reduction in the number of claims or an improvement in diagnostic accuracy. This may be due to an increasing level of litigation in the UK but we must also question whether we are indeed providing best-practice care to our hip fracture patients and whether these guidelines need further review.

Valgus osteotomy for nonunion and neglected neck of femur fractures

Nonunion neck of femur can be a difficult problem to treat, particularly in the young, and is associated with high complication rates of avascular necrosis due to the precarious blood supply and poor biomechanics. The various treatment options that have been described can be broadly divided according to the aim of improving either biology or biomechanics. Surgeries aimed at improving the biology, such as vascularized fibula grafting, have good success rates but require high levels of expertise and substantial resources. A popular surgical treatment aimed at improving the biomechanics-valgus intertrochanteric osteotomy-optimizes conditions for fracture healing by converting shear forces across the fracture site into compressive forces. Numerous variations of this surgical procedure have been developed and successfully applied in clinical practice. As a result, the proximal femoral orientation for obtaining a good functional outcome has evolved over the years, and the present concept of altering the proximal femoral anatomy as little as possible has arisen. This technical objective supports attaining union as well as a good functional outcome, since excessive valgus can lead to increased joint reaction forces. This review summarizes the historical and current literature on valgus intertrochanteric osteotomy treatment of nonunion neck of femur, with a focus on factors predictive of good functional outcome and potential pitfalls to be avoided as well as controversies surrounding this procedure.

Dedicated orthogeriatric service reduces hip fracture mortality. Ir J Med Sci. 2017;186:179-184. [PMID: 27059996 DOI: 10.1007/s11845-016-1453-3]

BACKGROUND

Hip fracture is a common serious injury afflicting the geriatric population and is associated with poor clinical outcomes, functional and walking disabilities and high 1-year mortality rates. A multidisciplinary approach has been shown to improve outcomes of geriatric patients with fragility fracture.

AIMS

We piloted a dedicated orthogeriatric service for hip fracture patients to determine if the service facilitated a change in major patient outcomes, such as mortality, length of stay and dependency.

METHODS

A dedicated orthogeriatrics service for hip fracture was established as a collaborative project between the Department of Geriatric Medicine and Department of Orthopaedic Surgery at a university teaching hospital. Orthogeriatrics service data were collected prospectively on an orthogeriatric filemaker database from July 2011 to July 2012 (N = 206). Data were compared to previously recorded data (Irish Hip Fracture Database) on a cohort of hip fracture patients admitted to the same orthopaedic trauma unit from July 2009 to July 2010 (N = 248).

RESULTS

Patients in the orthogeriatric service group experienced significant reductions in 1-year mortality (χ² = 13.34, P < 0.001), length of acute hospital stay (U = -3.77, P < 0.001) and requirements for further rehabilitation (χ ² = 26.59, P < 0.001). Patients in the pre-service establishment group were significantly more dependent following their fracture than the patients in the orthogeriatric service group (χ ² = 5.34, P = 0.021).

CONCLUSIONS

A multidisciplinary management approach to fragility fracture of the femoral neck that involves comprehensive geriatric assessment, daily medical involvement of a geriatric team and specialised follow-up assessment leads to a significant reduction in mortality and improved outcomes.

Pre-operative templating for trauma hemiarthroplasty (Thompson's)

INTRODUCTION

Surgical complications may be avoided by preoperative templating in trauma hemiarthroplasty.

MATERIALS AND METHODS

Digital templates for the Stryker™ range of Thompson's prostheses were created and fifty trauma patients that had undergone cemented hemiarthroplasty were retrospectively templated by 2 blinded surgeons.

RESULTS

Templating for prosthesis size was highly accurate with excellent Inter and intra-observer reproducibility. Sensitivity for identifying femoral canals too narrow for a Thompsons was 100%.

CONCLUSIONS

Templating is a valuable tool and should be standard practice in trauma. We have demonstrated that it is possible to generate custom templates to allow accurate templating.

A threshold for concern? C-reactive protein levels following operatively managed neck of femur fractures can detect infectious complications with a simple formula

INTRODUCTION

C-reactive protein (CRP) rises in response to multiple stimuli, including surgical procedures and infections. Deviations from the predicted CRP response to a given procedure may be an early indication of a postoperative complication.

METHODS

Three hundred and fifty-four patients with an operatively managed neck of femur fracture admitted over a 1-year period to an NHS Hospital Trust were included. CRP values collected during the postoperative period were retrospectively examined, and objective evidence of postoperative complications was sought. Data analysis explored daily CRP thresholds that maximised sensitivity and specificity for the detection of patients with a postoperative complication.

RESULTS

From the 5th to the 30th postoperative day, a CRP value in excess of the threshold defined by the formula 500/d (where d represents the number of postoperative days) retrospectively detected patients with a postoperative complication with a sensitivity of 0.97 and specificity of 0.82. Patients with a CRP value above the 500/d threshold during this period had a significantly increased 30-day mortality (10.0% vs. 3.9%, RR=2.74, p=0.03).

CONCLUSION

Following operatively managed neck of femur fractures, a CRP value in excess of the threshold defined by the formula 500/d may indicate the presence of a postoperative complication and defines a group with increased mortality. In this context, a prompt wound review and septic screen could promote the early detection and management of infectious postoperative complications.

Serum lactate as a marker of mortality in patients with hip fracture: A prospective study

Outcomes from patients suffering hip fracture remain poor, with 9% mortality at 30 days and 35% at 1 year. Despite robust guidelines these mortality rates have undergone little change. Admission serum lactate in patients with sepsis or suffering general trauma has been shown to be an indicator of adverse clinical outcomes. We investigated whether venous lactate can predict mortality for hip fracture patients. Over a 12-month period the admission venous lactate of all patients presenting to our institution with hip fractures was prospectively collated. Demographic and patient survivorship data were also prospectively recorded. Multivariate binary logistic regression and Cox proportional hazards ratio analysis was used to evaluate the relationship between admission venous lactate and 30-day mortality and early survivorship, whilst adjusting for age and gender. 770 patients were included in the study. The mean age was 80 years. The overall 30-day mortality for this cohort was 9.5%. Admission venous lactate was associated with early death. A 1mmol/L increase in venous lactate resulted in a 1.9 (95% CI 1.5-2.3 p<0.0001) fold increase in the odds of 30-day mortality and a 1.4 (95% CI: 1.2-1.6 p<0.0001) factor increase in the risk of death at any time after hip fracture. Admission venous lactate remained a predictor of mortality despite adjustment for patients American Society of Anesthesiologists (ASA) grade. Those with an admission serum lactate of 3mmol/L or greater were particularly at risk. This cohort had a 30-day mortality odds that was 5-fold higher than those whose level was less than 3mmol/L (p<0.0001) and at any-time risk of death that was 1.9 times higher (p<0.0001). Those with a level of less than 3mmol/L had a 30-day mortality of 6.8%. For those with an admission venous lactate of 3mmol/L or greater this was four times higher at 28%. The difference was statistically significant (p<0.0001). Elevated admission venous lactate following hip fracture is a predictor of early death. Venous lactate may be useful as a prognostic indicator or risk stratifier in patients with proximal femoral fractures.

Subtrochanteric fracture: the effect of cerclage wire on fracture reduction and outcome

INTRODUCTION

Subtrochanteric neck of femur fractures are a challenge to treat due to anatomical and biomechanical factors. Poor reduction, varus deformity, nonunion and return to theatre risks are high. A cerclage wire can augment an intramedullary nail to help fracture reduction and construct stability. Concerns exist regarding the use of cerclage wire on fracture zone vascularity. The aim of this study was to assess the benefits and adverse outcomes associated with the use of cerclage wiring.

PATIENTS AND METHODS

A 7-year retrospective review of all subtrochanteric fractures at a Level 1 trauma centre was performed. Pathological fractures, those associated with bisphosphonate use and segmental fractures were excluded. A clinical and radiographic review was performed. Our primary outcome measure was a composite of the major complications of this surgery, defined as either return to theatre for fixation failure, nonunion or implant failure. Fracture displacement, angulation and quality of reduction were measured as secondary outcome measures. Specific complications of the use of cerclage wiring were also reported.

RESULTS

One hundred and thirty four cases met the inclusion criteria for primary outcome. Reduction was achieved closed in 51.9% (n=70), open in 33.3% (n=45) and open with cerclage wire in 14.8% (n=20). Overall there were a total of 13 (9.7%) major complications. No cases with cerclage wire had a return to theatre. If cerclage wire was not used the major complication rate was 11.4%. Fracture displacement (11.0mm vs. 7.69mm) and distraction were related to return to theatre (p<0.05). Cerclage wire use improved fracture displacement (3.2mm vs. 8.8mm), angulation and quality of reduction (p<0.05).

CONCLUSIONS

Anatomical reduction is the key to success of subtrochanteric fractures. Cerclage wire use results in better fracture reduction. Some subtrochanteric fractures can be successfully treated with indirect reduction alone. If fractures cannot be reduced closed, reduction should be achieved by open methods. If a fracture is opened, a cerclage wire should be used, if the fracture pattern allows.

A comparative study between multiple cannulated screws and dynamic hip screw for fixation of femoral neck fracture in adults

PURPOSE

In younger adults with fractures of the femoral neck, anatomic reduction is compulsory and maintaining the reduction is crucial. Both cannulated screws and dynamic hip screw (DHS) have the capacity of compression in the fracture site but the strength for keeping reduction is not the same. The aim of this study was to compare the results with fixations of the femoral neck fractures with cannulated screws versus dynamic hip screw.

METHODS

This is a randomized clinical trial study on 58 cases with a minimum of one year follow-up. Leg length discrepancy, Harris Hip Score, infection, avascular necrosis of femoral head, and union of the fracture site were evaluated.

RESULTS

There were two failures in the first trimester in the cannulated screw group and three more failures in the second and third trimesters in this group. In the DHS group, there was no reduction and fixation failure in the follow-up period. There was no fixation failure (0 %) in Group B (DHS) but there were five fixation failures (18 %) in Group A (screw), and there is significant difference between the groups (p < 0.001). The rate of avascular necrosis was the same in both groups.

CONCLUSIONS

It seems to us that in our practice the fixation of femoral neck fracture in young adults with the DHS is a better option compared with the osteosynthsis with multiple cannulated screws.

Neck of femur fracture management by general surgeons at a rural hospital

BACKGROUND

Neck of femur (NOF) fractures are the most common injury among elderly patients and a significant burden on our healthcare system.

AIMS

This study aimed toevaluate if an Australian rural hospital serviced by general surgeons can meet the established standards of care for the management of NOF fractures by undertaking surgery within 48 hours.

METHODS

An audit of patients presenting to an Australian rural hospital with NOF fractures over a seven-year period. Patients were excluded if they were transferred or suffered peri-prosthetic or multi-trauma-related fractures. Outcomes included time to surgery, length of stay, and in-hospital mortality, and were compared to three similar Australian studies from hospitals with specialist orthopedic units. Descriptive statistics and meta-analysis were performed.

RESULTS

Overall, 182 patients presented with NOF fractures and 114 met our inclusion criteria. Only 12 per cent of patients were transferred. Patients were mostly female (74 per cent) and elderly (mean age 84.0 years). A total of 79 per cent of patients were operated on within48 hours; other studies reported 67-86 per cent. Mean length of stay was 11.9 days (versus 7.7-13.7), and in-hospital mortality was 4 per cent (versus 2-7 per cent).

CONCLUSION

This audit suggests that an Australian rural hospital serviced by general surgeons can meet the established standards of care for management of most NOF fractures. Some post-surgery outcomes are similar to those reported by larger centers with specialized orthopedics units.

Outcomes following fractured neck of femurin an Australian metropolitan teaching hospital

Objectives

To determine the morbidity and mortality outcomes of patients presenting with a fractured neck of femur in an Australian context. Peri-operative variables related to unfavourable outcomes were identified to allow planning of intervention strategies for improving peri-operative care.

Methods

We performed a retrospective observational study of 185 consecutive adult patients admitted to an Australian metropolitan teaching hospital with fractured neck of femur between 2009 and 2010. The main outcome measures were 30-day and one-year mortality rates, major complications and factors influencing mortality.

Results

The majority of patients were elderly, female and had multiple comorbidities. Multiple peri-operative medical complications were observed, including pre-operative hypoxia (17%), post-operative delirium (25%), anaemia requiring blood transfusion (28%), representation within 30 days of discharge (18%), congestive cardiac failure (14%), acute renal impairment (12%) and myocardial infarction (4%). Mortality rates were 8.1% at 30 days and 21.6% at one year. Factors predictive of one-year mortality were American Society of Anesthesiologists (ASA) score (odds ratio (OR) 4.2 (95% confidence interval (CI) 1.5 to 12.2)), general anaesthesia (OR 3.1 (95% CI 1.1 to 8.5)), age > 90 years (OR 4.5 (95% CI 1.5 to 13.1)) and post-operative oliguria (OR 3.6 (95% CI 1.1 to 11.7)).

Conclusions

Results from an Australian metropolitan teaching hospital confirm the persistently high morbidity and mortality in patients presenting with a fractured neck of femur. Efforts should be aimed at medically optimising patients pre-operatively and correction of pre-operative hypoxia. This study provides planning data for future interventional studies.

Cite this article: Bone Joint Res 2013;2:162–8.

Correlation between pre-injury mobility and ASA score with the mortality following femoral neck fracture in elderly

A poor pre-injury mobility and high American Society of Anaesthiologist (ASA) grading is thought to be associated with a poor survival following surgical treatment of femoral neck fracture in the elderly. Hence there are concerns among orthopaedic surgeons about surgical treatment in this group of patients. In this retrospective study, the pre-injury mobility and ASA scores of 401 patients with fractured neck of femur treated by surgery was assessed in relation to mortality following surgery within the first 30 days of injury. Following surgery, a temporary deterioration in the ASA grading and mobility was noticed. Patients who required intensive medical care following surgery had higher mortality rate. The mortality was 15% among patients with ASA III and 40% among patients with ASA IV. 14% of 65 immobile patients, 18% of those mobile with Zimmer frame passed away after surgery for femoral neck fracture. 6.1% of ASA I scorers died compared with 40% of ASA IV scorers; this difference was statistically significant (χ²=13.883, df=1, P<0.001). Significant number of patients with ASA-IV (60%) and immobile patients (88%) survived following surgery for femoral neck fracture. Poor pre-injury mobility and high ASA scoring are associated with higher early mortality following surgery for femoral neck fracture, however, this should not preclude surgery for patients with poor pre-injury ASA grading and mobility sustaining femoral neck fracture, as significant number of our patients survived.