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Journal articleZhou T, Salman D, Mcgregor A, 2024,
mHealth Apps for the Self-Management of Low Back Pain: Systematic Search in App Stores and Content Analysis
, JMIR MHEALTH AND UHEALTH, Vol: 12, ISSN: 2291-5222 -
Journal articleDavies AR, Sabharwal S, Liddle AD, et al., 2024,
The risk of revision is higher following shoulder hemiarthroplasty compared with total shoulder arthroplasty for osteoarthritis: a matched cohort study of 11,556 patients from the National Joint Registry, UK
, Acta Orthopaedica, Vol: 95, Pages: 73-85, ISSN: 0001-6470BACKGROUND AND PURPOSE: Total shoulder arthroplasty (TSA) and hemiarthroplasty (HA) are used in the management of osteoarthritis of the glenohumeral joint. We aimed to determine whether TSA or HA resulted in a lower risk of adverse outcomes in patients of all ages with osteoarthritis and an intact rotator cuff and in a subgroup of patients aged 60 years or younger. PATIENTS AND METHODS: Shoulder arthroplasties recorded in the National Joint Registry, UK, between April 1, 2012 and June 30, 2021, were linked to Hospital Episode Statistics in England. Elective TSAs and HAs were matched on propensity scores based on 11 variables. The primary outcome was all-cause revision. Secondary outcomes were combined revision/non-revision reoperations, 30-day inpatient complications, 1-year mortality, and length of stay. 95% confidence intervals (CI) were reported. RESULTS: 11,556 shoulder arthroplasties were included: 7,641 TSAs, 3,915 HAs. At 8 years 95% (CI 94-96) of TSAs and 91% (CI 90-92) of HAs remained unrevised. The hazard ratio (HR) varied across follow-up: 4-year HR 2.7 (CI 1.9-3.5), 8-year HR 2.0 (CI 0.5-3.5). Rotator cuff insufficiency was the most common revision indication. In patients aged 60 years or younger prosthesis survival at 8 years was 92% (CI 89-94) following TSA and 84% (CI 80-87) following HA. CONCLUSION: The risk of revision was higher following HA in patients with osteoarthritis and an intact rotator cuff. Patients aged 60 years and younger had a higher risk of revision following HA.
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Journal articleBoyles RH, Alexander CM, Belsi A, et al., 2024,
Are clinical prediction rules used in spinal cord injury care? A survey of practice
, Topics in Spinal Cord Injury Rehabilitation, Vol: 30, Pages: 45-58, ISSN: 1082-0744BACKGROUND: Accurate outcome prediction is desirable post spinal cord injury (SCI), reducing uncertainty for patients and supporting personalized treatments. Numerous attempts have been made to create clinical prediction rules that identify patients who are likely to recover function. It is unknown to what extent these rules are routinely used in clinical practice. OBJECTIVES: To better understand knowledge of, and attitudes toward, clinical prediction rules amongst SCI clinicians in the United Kingdom. METHODS: An online survey was distributed via mailing lists of clinical special interest groups and relevant National Health Service Trusts. Respondents answered questions about their knowledge of existing clinical prediction rules and their general attitudes to using them. They also provided information about their level of experience with SCI patients. RESULTS: One hundred SCI clinicians completed the survey. The majority (71%) were unaware of clinical prediction rules for SCI; only 8% reported using them in clinical practice. Less experienced clinicians were less likely to be aware. Lack of familiarity with prediction rules was reported as being a barrier to their use. The importance of clinical expertise when making prognostic decisions was emphasized. All respondents reported interest in using clinical prediction rules in the future. CONCLUSION: The results show widespread lack of awareness of clinical prediction rules amongst SCI clinicians in the United Kingdom. However, clinicians were positive about the potential for clinical prediction rules to support decision-making. More focus should be directed toward refining current rules and improving dissemination within the SCI community.
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Journal articlevan Helden JFL, Alexander E, Cabral HV, et al., 2023,
Home-based arm cycling exercise improves trunk control in persons with incomplete spinal cord injury: an observational study
, Scientific Reports, Vol: 13, ISSN: 2045-2322Arm cycling is used for cardiorespiratory rehabilitation but its therapeutic effects on the neural control of the trunk after spinal cord injury (SCI) remain unclear. We investigated the effects of single session of arm cycling on corticospinal excitability, and the feasibility of home-based arm cycling exercise training on volitional control of the erector spinae (ES) in individuals with incomplete SCI. Using transcranial magnetic stimulation, we assessed motor evoked potentials (MEPs) in the ES before and after 30 min of arm cycling in 15 individuals with SCI and 15 able-bodied controls (Experiment 1). Both groups showed increased ES MEP size after the arm cycling. The participants with SCI subsequently underwent a 6-week home-based arm cycling exercise training (Experiment 2). MEP amplitudes and activity of the ES, and movements of the trunk during reaching, self-initiated rapid shoulder flexion, and predicted external perturbation tasks were measured. After the training, individuals with SCI reached further and improved trajectory of the trunk during the rapid shoulder flexion task, accompanied by increased ES activity and MEP amplitudes. Exercise adherence was excellent. We demonstrate preserved corticospinal drive after a single arm cycling session and the effects of home-based arm cycling exercise training on trunk function in individuals with SCI.
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Journal articleEdwards TC, Soussi D, Gupta S, et al., 2023,
Collaborative team training in virtual reality is superior to individual learning for performing complex open surgery: a randomised controlled trial
, Annals of Surgery, Vol: 278, Pages: 850-857, ISSN: 0003-4932Objective: To assess if multiplayer virtual reality (VR) training was superior to single player training for acquisition of both technical and non-technical skills in learning complex surgery.Summary Background Data: Superior team-work in the operating room (OR) is associated with improved technical performance and clinical outcomes. VR can successfully train OR staff individually, however VR team training has yet to be investigated.Method: Forty participants were randomised to individual or team VR training. Individually-trained participants practiced alongside virtual avatar counterparts, whilst teams trained live in pairs. Both groups underwent five VR training sessions over 6-weeks. Subsequently, they underwent a real-life assessment in which they performed Anterior Approach Total Hip Arthroplasty (AA-THA) surgery on a high-fidelity model with real equipment in a simulated OR. Teams performed together and individually-trained participants were randomly paired up. Videos were marked by two blinded assessors recording the NOTSS, NOTECHS II and SPLINTS scores. Secondary outcomes were procedure time and number of technical errors.Results: Teams outperformed individually-trained participants for non-technical skills in the real-world assessment (NOTSS 13.1±1.5 vs 10.6±1.6, P=0.002, NOTECHS-II score 51.7±5.5 vs 42.3±5.6, P=0.001 and SPLINTS 10±1.2 vs 7.9±1.6, P=0.004). They completed the assessment 28.1% faster (27.2 minutes±5.5 vs 41.8 ±8.9, P<0.001), and made fewer than half the number of technical errors (10.4±6.1 vs 22.6±5.4, P<0.001).Conclusions: Multiplayer training leads to faster surgery with fewer technical errors and the development of superior non-technical skills.
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Journal articleVella-Baldacchino M, Webb J, Selvarajah B, et al., 2023,
Should we recommend patellofemoral arthroplasties to patients?
, BONE & JOINT OPEN, Vol: 4, Pages: 948-956, ISSN: 2633-1462 -
Journal articleNasser AAHH, Prakash R, Handford C, et al., 2023,
Predictors of mortality in periprosthetic fractures of the hip: results from the national PPF study
, Injury, Vol: 54, ISSN: 1879-0267INTRODUCTION: Periprosthetic fractures (PPFs) around the hip joint are increasing in prevalence. In this collaborative study, we aimed to investigate the impact of patient demographics, fracture characteristics, and modes of management on in-hospital mortality of PPFs involving the hip. METHODS: Using a multi-centre cohort study design, we retrospectively identified adults presenting with a PPF around the hip over a 10-year period. Univariate and multivariable logistic regression analyses were performed to study the independent correlation between patient, fracture, and treatment factors on mortality. RESULTS: A total of 1,109 patients were included. The in-hospital mortality rate was 5.3%. Multivariable analyses suggested that age, male sex, abbreviated mental test score (AMTS), pneumonia, renal failure, history of peripheral vascular disease (PVD) and deep surgical site infection were each independently associated with mortality. Each yearly increase in age independently correlates with a 7% increase in mortality (OR 1.07, p=0.019). The odds of mortality was 2.99 times higher for patients diagnosed with pneumonia during their hospital stay [OR 2.99 (95% CI 1.07-8.37) p=0.037], and 7.25 times higher for patients that developed renal failure during their stay [OR 7.25 (95% CI 1.85-28.47) p=0.005]. Patients with history of PVD have a six-fold greater mortality risk (OR 6.06, p=0.003). Mode of treatment was not a significant predictor of mortality. CONCLUSION: The in-hospital mortality rate of PPFs around the hip exceeds 5%. The fracture subtype and mode of management are not independent predictors of mortality, while patient factors such as age, AMTS, history of PVD, pneumonia, and renal failure can independently predict mortality. Peri-operative optimisation of modifiable risk factors such as lung and kidney function in patients with PPFs around the hip during their hospital stay is of utmost importance.
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Journal articleWoodbridge H, Norton C, Jones M, et al., 2023,
Clinician and patient perspectives on the barriers and facilitators to physical rehabilitation in intensive care: a qualitative interview study
, BMJ Open, Vol: 13, ISSN: 2044-6055Objectives The objective of this study is to explore patient, relative/carer and clinician perceptions of barriers to early physical rehabilitation in intensive care units (ICUs) within an associated group of hospitals in the UK and how they can be overcome.Design Qualitative study using semi-structured interviews and thematic framework analysis.Setting Four ICUs over three hospital sites in London, UK.Participants Former ICU patients or their relatives/carers with personal experience of ICU rehabilitation. ICU clinicians, including doctors, nurses, physiotherapists and occupational therapists, involved in the delivery of physical rehabilitation or decisions over its initiation.Primary and secondary outcomes measures Views and experiences on the barriers and facilitators to ICU physical rehabilitation.Results Interviews were carried out with 11 former patients, 3 family members and 16 clinicians. The themes generated related to: safety and physiological concerns, patient participation and engagement, clinician experience and knowledge, teamwork, equipment and environment and risks and benefits of rehabilitation in intensive care. The overarching theme for overcoming barriers was a change in working model from ICU clinicians having separate responsibilities (a multidisciplinary approach) to one where all parties have a shared aim of providing patient-centred ICU physical rehabilitation (an interdisciplinary approach).Conclusions The results have revealed barriers that can be modified to improve rehabilitation delivery in an ICU. Interdisciplinary working could overcome many of these barriers to optimise recovery from critical illness.
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Journal articleLiu S, Amiri P, McGregor A, et al., 2023,
Bilateral asymmetry in knee and hip musculoskeletal loading during stair ascending/descending in individuals with unilateral mild to moderate medial knee osteoarthritis
, Annals of Biomedical Engineering, Vol: 51, Pages: 2490-2503, ISSN: 0090-6964Most cases of unilateral knee osteoarthritis (OA) progress to bilateral OA within 10 years. Biomechanical asymmetries have been implicated in contralateral OA development; however, gait analysis alone does not consistently detect asymmetries in OA patient gait. Stair ambulation is a more demanding activity that may be more suited to reveal between-leg asymmetries in OA patients. The objective of this study was to investigate the between-leg biomechanical differences in patients with unilateral mild-to-moderate knee OA. Sixteen unilateral mild-to-moderate medial knee OA patients and 16 healthy individuals underwent kinematic and kinetic analysis of stair ascent and descent. Stair ascent produced higher loading and muscle forces in the unaffected limb compared to the OA limb, and stair descent produced lower loading on the OA limb compared to healthy subjects. These biomechanical differences were apparent in the ankle, knee, and hip joints. The implications of these findings are that OA patients rely more heavily on their unaffected sides than the affected side in stair ascent, a strategy that may be detrimental to the unaffected joint health. The reduction in affected limb loading in stair descent is thought to be related to minimizing pain.
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Journal articleEdwards T, 2023,
Survivorship and risk factors for revision of metal-on-metal hip resurfacing – a long-term follow-up study
, Bone & Joint Open, Vol: 4, Pages: 853-858, ISSN: 2633-1462AimsMetal-on-metal hip resurfacing (MoM-HR) has seen decreased usage due to safety and longevity concerns. Joint registries have highlighted the risks in females, smaller hips, and hip dysplasia. This study aimed to identify if reported risk factors are linked to revision in a long-term follow-up of MoM-HR performed by a non-designer surgeon.MethodsA retrospective review of consecutive MoM hip arthroplasties (MoM-HRAs) using Birmingham Hip Resurfacing was conducted. Data on procedure side, indication, implant sizes and orientation, highest blood cobalt and chromium ion concentrations, and all-cause revision were collected from local and UK National Joint Registry records.ResultsA total of 243 hips (205 patients (163 male, 80 female; mean age at surgery 55.3 years (range 25.7 to 75.3)) with MoM-HRA performed between April 2003 and October 2020 were included. Mean follow-up was 11.2 years (range 0.3 to 17.8). Osteoarthritis was the most common indication (93.8%), and 13 hips (5.3%; 7M:6F) showed dysplasia (lateral centre-edge angle < 25°). Acetabular cups were implanted at a median of 45.4° abduction (interquartile range 41.9° - 48.3°) and stems neutral or valgus to the native neck-shaft angle. In all, 11 hips (4.5%; one male, ten females) in ten patients underwent revision surgery at a mean of 7.4 years (range 2.8 to 14.2), giving a cumulative survival rate of 94.8% (95% confidence interval (CI) 91.6% to 98.0%) at ten years, and 93.4% (95% CI 89.3% to 97.6%) at 17 years. For aseptic revision, male survivorship was 100% at 17 years, and 89.6% (95% CI 83.1% to 96.7%) at ten and 17 years for females. Increased metal ion levels were implicated in 50% of female revisions, with the remaining being revised for unexplained pain or avascular necrosis.ConclusionThe Birmingham MoM-HR showed 100% survivorship in males, exceeding the National Institute for Health and Care Excellence ‘5% at ten years’ threshold. Female sex and small component sizes a
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Journal articleKaria M, Logishetty K, Johal H, et al., 2023,
5 year follow up of a hydroxyapatite coated short stem femoral component for hip arthroplasty: a prospective multicentre study
, Scientific Reports, Vol: 13, ISSN: 2045-2322Short stem, uncemented femoral implants for hip arthroplasty are bone conserving achieving stability through initial metaphyseal press-fit and biological fixation. This study aimed to evaluate the survivorship, mid-term function and health related quality of life outcomes in patients who have undergone total hip arthroplasty (THA) with a fully hydroxyapatite coated straight short stem femoral component with up to 5 years follow-up. 668 patients were recruited to a multicentre study investigating the performance of the cementless Furlong Evolution® stem for THA. 137 patients withdrew at various time points. The mean follow-up was 49 months. Clinical (Harris Hip Score (HHS), radiographic and patient-reported outcome measures—Oxford Hip Score (OHS) and EuroQol 5D (EQ-5D), were recorded pre-operatively and at 6 weeks, 6 months, 1 year, 3 year and 5 year follow ups. At 5-year follow-up, 12 patients underwent revision surgery, representing a cumulative revision rate of 1.8%. Median OHS, HHS and EQ5D scores improved significantly: OHS improved from a pre-operative median of 21 (IQR 14–26) to 47 (IQR 44–48) (p < 0.001). HHS improved from 52 (IQR 40–63) to 98 (IQR 92–100) (p < 0.001) and EQ5D improved from 70 (IQR 50–80) to 85 (IQR 75–95) (p < 0.001). This fully HA-coated straight short femoral stem implant demonstrated acceptable mid-term survivorship and delivered substantial improvements in function and quality of life after THA.
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Journal articleGreen C, Beaney T, Salman D, et al., 2023,
The impacts of social restrictions during the COVID-19 pandemic on the physical activity levels of over 50-year olds: The CHARIOT COVID-19 Rapid Response (CCRR) cohort study.
, PLoS One, Vol: 18, ISSN: 1932-6203OBJECTIVES: To quantify the associations between shielding status and loneliness at the start of the COVID-19 pandemic, and physical activity (PA) levels throughout the pandemic. METHODS: Demographic, health and lifestyle characteristics of 7748 cognitively healthy adults aged >50, and living in London, were surveyed from April 2020 to March 2021. The International Physical Activity Questionnaire (IPAQ) short-form assessed PA before COVID-19 restrictions, and up to 6 times over 11 months. Linear mixed models investigated associations between shielding status and loneliness at the onset of the pandemic, with PA over time. RESULTS: Participants who felt 'often lonely' at the outset of the pandemic completed an average of 522 and 547 fewer Metabolic Equivalent of Task (MET) minutes/week during the pandemic (95% CI: -809, -236, p<0.001) (95% CI: -818, -275, p<0.001) than those who felt 'never lonely' in univariable and multivariable models adjusted for demographic factors respectively. Those who felt 'sometimes lonely' completed 112 fewer MET minutes/week (95% CI: -219, -5, p = 0.041) than those who felt 'never lonely' following adjustment for demographic factors. Participants who were shielding at the outset of the pandemic completed an average of 352 fewer MET minutes/week during the pandemic than those who were not (95% CI: -432, -273; p<0.001) in univariable models and 228 fewer MET minutes/week (95% CI: -307, -150, p<0.001) following adjustment for demographic factors. No significant associations were found after further adjustment for health and lifestyle factors. CONCLUSIONS: Those shielding or lonely at pandemic onset were likely to have completed low levels of PA during the pandemic. These associations are influenced by co-morbidities and health status.
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Journal articleMcMenemy L, Behan FP, Kaufmann J, et al., 2023,
Association between combat-related traumatic injury and skeletal health: bone mineral density loss is localized and correlates with altered loading in amputees: the Armed Services Trauma Rehabilitation Outcome (ADVANCE) Study
, Journal of Bone and Mineral Research, Vol: 38, Pages: 1227-1233, ISSN: 0884-0431The association between combat-related traumatic injury (CRTI) and bone health is uncertain. A disproportionate number of lower limb amputees from the Iraq and Afghanistan conflicts are diagnosed with osteopenia/osteoporosis, increasing lifetime risk of fragility fracture and challenging traditional osteoporosis treatment paradigms. The aim of this study is to test the hypotheses that CRTI results in a systemic reduction in bone mineral density (BMD) and that active traumatic lower limb amputees have localized BMD reduction, which is more prominent with higher level amputations. This is a cross-sectional analysis of the first phase of a cohort study comprising 575 male adult UK military personnel with CRTI (UK-Afghanistan War 2003 to 2014; including 153 lower limb amputees) who were frequency-matched to 562 uninjured men by age, service, rank, regiment, deployment period, and role-in-theatre. BMD was assessed using dual-energy X-ray absorptiometry (DXA) scanning of the hips and lumbar spine. Femoral neck BMD was lower in the CRTI than the uninjured group (T-score -0.08 versus -0.42 p = .000). Subgroup analysis revealed this reduction was significant only at the femoral neck of the amputated limb of amputees (p = 0.000), where the reduction was greater for above knee amputees than below knee amputees (p < 0.001). There were no differences in spine BMD or activity levels between amputees and controls. Changes in bone health in CRTI appear to be mechanically driven rather than systemic and are only evident in those with lower limb amputation. This may arise from altered joint and muscle loading creating a reduced mechanical stimulus to the femur resulting in localized unloading osteopenia. This suggests that interventions to stimulate bone may provide an effective management strategy. © 2023 Crown copyright and The Authors. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Soci
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Conference paperRedman I, Jones G, 2023,
1244 Wound dehiscence and infection of a total knee replacement secondary to postoperative 'Dorsal fin' intra-articular vertical patella dislocation
, Association-of-Surgeons-in-Training Surgical Conference (ASiT), Publisher: Wiley, ISSN: 0007-1323 -
Journal articleNasser AAHH, Osman K, Chauhan GS, et al., 2023,
Characteristics and risk factors of UCS fracture subtypes in periprosthetic fractures around the hip
, Bone & Joint Open, Vol: 4, Pages: 659-667, ISSN: 2633-1462AimsPeriprosthetic fractures (PPFs) following hip arthroplasty are complex injuries. This study evaluates patient demographic characteristics, management, outcomes, and risk factors associated with PPF subtypes over a decade.MethodsUsing a multicentre collaborative study design, independent of registry data, we identified adults from 29 centres with PPFs around the hip between January 2010 and December 2019. Radiographs were assessed for the Unified Classification System (UCS) grade. Patient and injury characteristics, management, and outcomes were compared between UCS grades. A multinomial logistic regression was performed to estimate relative risk ratios (RRR) of variables on UCS grade.
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Journal articleDavies A, Lloyd T, Sabharwal S, et al., 2023,
Anatomical shoulder replacements in young patients: a systematic review and meta-analysis
, Shoulder & Elbow, Vol: 15, Pages: 4-14, ISSN: 1758-5732IntroductionIncreasing numbers of young patients receive shoulder replacements. Greater information on outcomes is needed to inform implant choice. The aim of this study was to investigate the survivorship and clinical effectiveness of hemiarthroplasty and anatomical total shoulder arthroplasty (TSA) in patients younger than 65 years.MethodA systematic review was performed of MEDLINE, EMBASE, CENTRAL, The Cochrane Database of Systematic Reviews and National Joint Registry reports. The primary outcomes were implant survival and change in perioperative shoulder scores.ResultsMeta-analysis of implant survivorship was performed of six studies reporting on 416 patients. Implant survival was 86.1% (72.1,100) at 10 years for hemiarthroplasty and 82.3% (64.6,100) for TSA. 20 year survival was 80.0% for hemiarthroplasty (72.5,87.4) and 75.0% (56.9,93.1) for TSA. Ten studies were included in the meta-analysis of shoulder scores, multiple instruments were used. The standardised mean difference between pre-operative and post-operative shoulder scores was 2.15 (1.95, 2.35) for TSA at 4.2–4.9 years, and 2.72 (1.98,3.47) for hemiarthroplasty at 3.8–6 years.ConclusionOver 80% of shoulder replacements last more than 10 years, and 75% last more than 20 years. Significant improvements in shoulder scores are shown at all time points.
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Journal articleZhou T, Salman D, Mcgregor AH, 2023,
What do we mean by self-management' for chronic low back pain? A narrative review
, EUROPEAN SPINE JOURNAL, ISSN: 0940-6719 -
Journal articleMuddaluru V, Boughton O, Donnelly T, et al., 2023,
Developmental dysplasia of the hip is common in patients undergoing total hip arthroplasty under 50 years of age
, SICOT-J, Vol: 9, ISSN: 2426-8887- Cite
- Citations: 8
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Journal articleKaria M, Boughton O, Mohan S, et al., 2023,
Enhancing acetabular reaming accuracy: optimal techniques and a novel reamer design
, Journal of Orthopaedic Surgery and Research, Vol: 18, Pages: 1-7, ISSN: 1749-799XIntroductionSuccessful press-fit implantation relies on an accurately reamed bone cavity. Inaccurate reaming can lead to a suboptimal press-fit risking fracture and cup deformation or excessive micromotion and loosening. Several factors may impact reaming accuracy including the reamer design, the surgeon’s technique and the bone quality. The aim of this study is to investigate the accuracy of reaming techniques and the accuracy of a novel reamer design.MethodsEighty composite bone models, half high-density and half low-density, were reamed with either a conventional or an additively-manufactured reamer with a novel design employing either a straight or ‘whirlwind’ reaming technique. Reamed cavities were scanned using a 3D laser scanner and the median difference between achieved and expected diameters compared. ResultsThe novel reamer design was more accurate than the unused conventional reamer, using both whirlwind (0.1mm (IQR 0-0.2) vs 0.3mm (IQR 0.3-0.4); p<0.001) and straight techniques (0.3mm (IQR 0.1-1.0) vs 1.2mm (IQR 1-1.6); p=0.001). Whirlwind reaming was more accurate than straight reaming using both conventional (0.3mm (IQR 0.3-0.4) vs 1.2mm (IQR 1-1.6); p<0.0001) and single use reamers (0.1mm (IQR 0-0.2) vs 0.3mm (IQR 0.1-1.0); p=0.007). Reaming errors were higher in low-density bone compared to high-density bone, for both reamer types and reaming techniques tested (0.6mm (IQR 0.3-1.5) vs 0.3mm (IQR 0.1-0.8); p=0.005). ConclusionWe present a novel reamer design that demonstrates superior accuracy to conventional reamers in achieving the desired reaming diameter. Improved reaming accuracy was also demonstrated using both devices and in both bone models, using a ‘whirlwind’ technique. We recommend the use of this novel reamer design employing a ‘whirlwind’ technique to optimise reaming accuracy. Particular attention should be paid towards patients with lower bone quality which may be more susceptible to highe
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Journal articleAlagha MA, Logishetty K, OHanlon C, et al., 2023,
Three-dimensional preoperative planning software for hip resurfacing arthroplasty
, Bioengineering, Vol: 10, Pages: 1-10, ISSN: 2306-5354Three-dimensional planning of hip arthroplasty is associated with better visualisation ofanatomical landmarks and enhanced mapping for preoperative implant sizing, which can lead to adecrease in surgical time and complications. Despite the advantages of hip resurfacing arthroplasty(HRA), it is considered a technically challenging procedure and associated with inaccurate implantplacement. This study aimed to examine the validity, reliability, and usability of preoperative 3DHip Planner software for HRA. Fifty random cases of various hip osteoarthritis severity wereplanned twice by two junior trainees using the 3D Hip Planner within a one-month interval. Outcome measures included femoral/cup implant size, stem-shaft angle, and cup inclination angle, andwere assessed by comparing outcomes from 2D and 3D planning. An adapted unified theory ofacceptance and use of technology (UTAUT) survey was used for software usability. Bland–Altmanplots between 3D and 2D planning for stem-shaft and inclination angles showed mean differencesof 0.7 and −0.6, respectively (r = 0.93, p < 0.001). Stem-shaft and inclination angles showed inter-raterreliability biases of around −2° and 3°, respectively. Chi-square and Pearson’s correlation for femoralimplant size showed a significant association between the two assessors (r = 0.91, p < 0.001). The 3Dtest–retest coefficient of repeatability for stem-shaft and inclination angles were around ±2° and ±3°,respectively, with a strong significant association for femoral implant size (r = 0.98, p < 0.001). Surveyanalyses showed that 70–90% agreed that 3D planning improved expectancy in four domains. 3Dhip planner appears to be valid and reliable in preoperative HRA and shows significant potential inoptimising the quality and accuracy of surgical planning.
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