Modern multiligament knee injury surgical reconstruction techniques can achieve excellent knee function and patient satisfaction, with low complication rates.

PURPOSE: To report on the recovery of strength and functional capacity symmetry following multiligament knee surgical reconstruction (MLKR), as well as the capacity of athletes to return to sport. METHODS: This prospective cohort study recruited 47 patients undergoing MLKR between February 2018 and July 2021. Forty patients had full outcome assessment postoperatively at 6, 12 and 24 months and were included in the analysis, 75% were knee dislocation one injuries and 60% were injured playing sport. Patient-reported outcome measures (PROMs) assessed included the International Knee Documentation Committee score, the Knee Outcome Survey, the Lysholm Knee Score and the Tegner Activity Scale (TAS). Patient satisfaction was also assessed. Objective assessment included assessment of active knee flexion and extension range of motion (ROM), the single (single horizontal hop for distance [SHD]) and triple (triple horizontal hop for distance [THD]) hop tests for distance and peak isokinetic knee flexor/extensor torque. RESULTS: All PROMs significantly improved (p < 0.001) from presurgery to 24 months postsurgery. At 24 months, 70% of patients were satisfied with their sports participation. Active knee flexion (p < 0.0001) and extension (p < 0.0001) ROM significantly improved over time, as did the limb symmetry indices (LSIs) for the SHD (p < 0.0001), THD (p < 0.0001), peak knee extensor (p < 0.0001) and flexor (p = 0.012) torque. While LSIs for the SHD, THD and knee flexor strength tended to plateau by 12 months, knee extensor strength continued to improve from 12 to 24 months. CONCLUSIONS: The majority of patients undergoing modern MLKR surgical techniques and rehabilitation can achieve excellent knee function, with low complication rates. LEVEL OF EVIDENCE: Level IV.

A cadaveric study investigating the role of the anterior inferior tibio-fibular ligament and the posterior inferior tibio-fibular ligament in ankle fracture syndesmosis stability.

BACKGROUND: This cadaveric study aimed to investigate the role AITFL and PITFL have on preventing talar shift in ankle fractures, as well as investigating the role of AITFL reconstruction in preventing talar shift. METHODS: Twelve lower limb cadavers were used. Talar shift was measured following: Step 1- no ligaments cut; Step 2- entire deltoid ligament division; Step 3- group A (5 specimens) PITFL cut whilst group B (7 specimens) AITFL cut; Step 4- group A had AITFL divided whilst group B had PITFL cut. Reconstruction of the AITFL was performed using part of the superior extensor retinaculum as a local flap. Measurement of talar shift was then repeated. RESULTS: With no ligaments divided, mean talar shift was 0.8mm for group A and 0.7mm for group B. When the deltoid ligament was divided, mean talar shift for group A was 4.8mm compared to 4.7mm in group B (P=1.00). The mean shift in group A after PITFL division was 6.0mm, increasing the talar shift by an average of 1.2mm. In group B after AITFL division mean talar shift was 8.3mm (P=0.06), increasing talar shift by an average of 3.6mm. After division of the second tibiofibular ligament, mean talar shift in group A measured 10.0mm and in group B was 10.9mm (P=0.29). Three times more talar shift occurred after the AIFTL was divided compared to the PITFL (P=0.06). CONCLUSION: Consequently, repairing the PITFL in isolation (for example by fixation of a posterior malleolus avulsion fracture) may not adequately prevent talar shift; we feel consideration should also be given to reconstruction of the AITFL to augment the syndesmosis fixation, which may provide a stronger restoration of ankle stability. LEVEL OF CLINICAL EVIDENCE: 5.

Can we accurately predict nerve conduction study outcome using a carpal tunnel syndrome questionnaire?

NCS are often routinely performed for CTS despite recommendations from the BOA, BSSH and NICE that they are associated with increased costs and prolonged waiting times. This prospective study aimed to assess if the Kamath and Stothard clinical questionnaire could accurately predict nerve conduction study (NCS) results when diagnosing carpal tunnel syndrome (CTS). Eighty-eight patients referred with signs and symptoms of CTS from September 2016 to February 2017 were included. All patients were assessed by specialist hand therapists using the Kamath and Stothard carpal tunnel questionnaire (CTQ) and all patients independently underwent NCS by neurophysiologists. We compared results of CTQ score versus NCS findings. Results showed that a CTQ score of less than 3 correlated 100% to negative NCS. When the CTQ score was more than or equal to 5, 90% of patients had a positive NCS result. For patients with a CTQ score of 3 or 4, the NCS could not be reliably predicted. These findings suggest that the Kamath and Stothard CTQ is a useful tool in determining which patients may require NCS. We suggest that only patients with a CTQ score of 3 or 4 and with equivocal signs and symptoms should undergo NCS. The questionnaire has the potential to be used as a primary tool for diagnosing CTS, with significant cost savings and reduction in waiting times for NCS.

Antibiotic treatment of asymptomatic bacteriuria prior to hip and knee arthroplasty; a systematic review of the literature.

BACKGROUND: There is significant debate as to whether routine antibiotic treatment of asymptomatic bacteriuria (ASB) in arthroplasty patients reduces the risk of subsequent PJI. No previous systematic reviews have been undertaken on this subject. The aim of this systematic review was to investigate whether antibiotic treatment of asymptomatic bacteriuria in arthroplasty patients reduces the risk of prosthetic joint infection and to investigate whether the organisms cultured in peri-operative urine samples are the same as those responsible for subsequent prosthetic joint infections. METHODS: Medline and SCOPUS databases were searched using a systematic search strategy. Inclusion Criteria were that the paper must present data detailing infection rates in patients with asymptomatic bacteriuria versus those without and must provide information on infection rates for ASB patients treated with antibiotics versus those not treated. Non-English Language papers and Conference Abstracts in which a full manuscript was not published were excluded. Two hundred and five papers were returned - three papers were included in the review, comprising 3267 patients. RESULTS: Only 3 studies met the inclusion criteria. The published literature does not support the routine antibiotic treatment of asymptomatic bacteriuria in arthroplasty patients. The organisms responsible for peri-prosthetic joint infection in patients with pre-operative asymptomatic bacteriuria are different from that cultured in their urine during the pre-operative period. This means that, although biologically possible, a direct causal relationship appears extremely unlikely. CONCLUSIONS: The evidence base supporting antibiotic treatment of asymptomatic bacteriuria prior to arthroplasty surgery is weak. Given the lack of evidence to support a direct causal relationship, routine antibiotic treatment of ASB in arthroplasty patients is not justified.

A comparison of surgical exposures for posterolateral osteochondral lesions of the talar dome.

BACKGROUND: Perpendicular access to the posterolateral talar dome for the management of osteochondral defects is difficult. We examined exposure available from each of four surgical approaches. MATERIALS AND METHODS: Four surgical approaches were performed on 9 Thiel-embalmed cadavers: anterolateral approach with arthrotomy; anterolateral approach with anterior talo-fibular ligament (ATFL) release; anterolateral approach with antero-lateral tibial osteotomy; and anterolateral approach with lateral malleolus osteotomy. The furthest distance posteriorly allowing perpendicular access with a 2mm k-wire was measured. RESULTS: An anterolateral approach with arthrotomy provided a mean exposure of the anterior third of the lateral talar dome. A lateral malleolus osteotomy provided superior exposure (81.5% vs 58.8%) compared to an anterolateral tibial osteotomy. CONCLUSIONS: Only the anterior half of the lateral border of the talar dome could be accessed with an anterolateral approach without osteotomy. A fibular osteotomy provided best exposure to the posterolateral aspect of the talar dome.

Improving acute kidney injury management in lower limb arthroplasty: an educational approach.

INTRODUCTION: Acute kidney injury (AKI) is a common but preventable cause of morbidity in elective arthroplasty patients. This study aimed to review the incidence and management of AKI in patients undergoing elective lower limb arthroplasty and compare results to those after the introduction of educational measures to improve prevention, recognition and management of AKI. METHODS: A retrospective case note review of all patients undergoing elective hip or knee arthroplasty between August and October 2013 was performed. Results were compared to patients treated from February to April 2014, after the introduction of a renal protection protocol, checklist poster and educational sessions. Results were statistically compared using Fisher's exact test. RESULTS: Two hundred and eleven patients were included in the study: 104 in the initial cohort and 107 in the second cohort. Twenty patients (19.2 %) developed AKI in the initial cohort and 12 patients (11.2 %) in the second (p = 0.13). Recognition, documentation and management of AKI were significantly better following educational sessions and dissemination of posters throughout clinical areas, with 75 % of patients in the second cohort having their AKI documented and treated versus 30 % in the initial cohort. DISCUSSION/CONCLUSIONS: This quality improvement project has demonstrated the significant impact that simple educational measures can have on improving AKI prevention, recognition and management in patients undergoing elective arthroplasty surgery. The introduction of a logical treatment checklist has been well received by both medical and nursing staff and ensures prompt and efficient management of AKI in a non-specialist area.

The ROSA robotic-arm system reliably restores joint line height, patella height and posterior condylar offset in total knee arthroplasty.

INTRODUCTION: There is growing interest in the use of robotic TKA to improve accuracy of component positioning in Total Knee Arthroplasty (TKA). The aim of this study was to investigate the accuracy of implant component position using the ROSA® knee system with specific reference to Joint Line Height, Patella Height and Posterior Condylar Offset (PCO). METHODS: This was a retrospective review of a prospectively-maintained database of the initial 100 consecutive TKAs performed by a high volume surgeon using the ROSA® knee system. Both the image-based and imageless workflow were used and two prosthesis types were implanted. To determine the accuracy of component positioning, the immediate post-operative radiograph was reviewed and compared with the immediate pre-operative radiograph with regards to Joint Line Height, Patella Height and Posterior Condylar Offset. RESULTS: 100 consecutive patients undergoing TKA using the ROSA system were included; mean age 70 years (range 49-95 years). Mean change in joint line height was 0.2 mm, patella height (Insall-Salvati ratio) 0.01 and posterior condylar offset 0.02 mm; there was no statistically significant difference between the pre and post-operative values. No difference was demonstrated between image-based or imageless workflows, or between implant design (Persona versus Vanguard) regarding joint line height, patella height and PCO. CONCLUSION: This study validates the use of the ROSA® knee system in accurately restoring Joint Line Height, Patella Height and Posterior Condylar Offset in TKA surgery. No significant differences were found between imageless and image-based groups, or between implant designs (Persona versus Vanguard).

Comparative analysis of radiation exposure in robot-assisted total knee arthroplasty using popular robotic systems.

Robotic-assisted TKA (RATKA) is a rapidly emerging technique that has been shown to improve precision and accuracy in implant alignment in TKA. Robotic-assisted TKA (RATKA) uses computer software to create a three-dimensional model of the patient's knee. Different types of preoperative imaging, including radiographs and CT scans, are used to create these models, each with varying levels of radiation exposure. This study aims to determine the radiation dose associated with each type of imaging used in RATKA, to inform patients of the potential risks. A retrospective search of our clinical radiology and arthroplasty database was conducted to identify 140 knees. The patients were divided into three groups based on the type of preoperative imaging they received: (1) CT image-based MAKO Protocol, (2) Antero-posterior long leg alignment films (LLAF), (3) standard AP, lateral, and skyline knee radiographs. The dose of CT imaging technique for each knee was measured using the dose-length product (DLP) with units of mGycm2, whereas the measurement for XRAY images was with the dose area product (DAP) with units of Gycm2. The mean radiation dose for patients in the CT (MAKO protocol) image-based group was 1135 mGy.cm2. The mean radiation dose for patients in the LLAF group was 3081 Gycm2. The mean radiation dose for patients undergoing knee AP/lateral and skyline radiographs was the lowest of the groups, averaging 4.43 Gycm2. Through an ANOVA and post hoc analysis, the results between groups was statistically significant. In this study, we found a significant difference in radiation exposure between standard knee radiographs, LLAF and CT imaging. Nonetheless, the radiation dose for all groups is still within acceptable safety limits.

Mako versus ROSA: comparing surgical accuracy in robotic total knee arthroplasty.

There is increasing adoption of robotic surgical technology in Total Knee Arthroplasty. The ROSA® knee system can be used in either image-based mode (using pre-operative calibrated radiographs) or imageless modes (using intra-operative bony registration). The Mako knee system is an image-based system (using a pre-operative CT scan). This study aimed to compare surgical accuracy between the ROSA and Mako systems with specific reference to joint line height, patella height, posterior condylar offset and tibial slope. This was a retrospective review of a prospectively collected data of the initial 50 consecutive ROSA TKAs and the initial 50 consecutive Mako TKAs performed by two high-volume surgeons. To determine the accuracy of component positioning, the immediate post-operative radiograph was reviewed and compared with the immediate pre-operative radiograph with regards to joint line height (JLH), patella height (PH), tibial slope (TS) and posterior condylar offset (PCO). Mean difference between pre- and post-operative radiographs using the ROSA knee system of joint line height was 0.47 mm (SD 0.95) posterior condylar offset 0.16 mm (SD 0.76), tibial slope 0.9 degrees (SD 1.6) and patella height 0.01 (SD 0.05). Mean difference using the MAKO knee system of joint line height was 0.26 (SD 1.08), posterior condylar offset -0.26 mm (SD 0.78), tibial slope 1.8 degrees and patella height 0.03. No significant difference was demonstrated between the accuracy of component positioning of the ROSA or MAKO knee systems. Our study is the first study to compare the accuracy of the ROSA and MAKO knee systems in total knee arthroplasty. Both systems are highly accurate in restoring native posterior condylar offset, joint line height, tibial slope and patella height in TKA with no significant difference demonstrated between the two groups.

Early surgery improves survival after femoral fractures in the elderly: A retrospective review of 502 fragility fractures.

AIMS: Fragility fractures are a growing global healthcare burden; fragility fractures of the femur have been shown to occur in a highly comorbid patient group, with parallels to hip fracture patients. This study aimed to investigate if early surgery for femoral fractures, distal to the hip, resulted in a reduction in mortality in patients over 65 years of age. METHODS: A retrospective review of prospectively collected data for all consecutive femoral fractures in patients aged over 65 years who underwent surgical management between January 2000 and December 2018. Data was extracted from the Fracture Outcomes Research Database (FORD) and analysed to assess if early surgery, defined as occurring within 48 h of hospital admission with a fragility femur fracture, had an effect on 30 day and 1 year mortality. RESULTS: 502 eligible patients were included; median follow up time was 57 months. 24 patients (4.7%) died within 30 days of surgery and 105 patients (20.9%) had died within 1 year of surgery. Patients who underwent surgery within 48 h of admission had a significantly reduced chance of mortality within 1 year of surgery compared to patients who had surgery more than 48 h after admission (OR = 0.401, 95% CI 0.25-0.65, p<0.001). Following Multivariate Cox Regression analysis the hazard ratio of 1 year mortality following early surgery remained significantly reduced (HR = 0.57, 95% CI 0.36-0.92, p = 0.020). CONCLUSIONS: This study demonstrates that fragility femoral fracture patients represent a similar cohort to hip fracture patients, with high mortality rates. We recommend that hip fracture management principles are also employed for fragility femoral fractures in patients over 65 years, with rapid pre-operative optimisation to ensure these patients undergo early surgical intervention.

Birmingham Hip Resurfacing at 25 years.

Aims: The Birmingham Hip Resurfacing (BHR) was introduced in 1997 to address the needs of young active patients using a historically proven large-diameter metal-on-metal (MoM) bearing. A single designer surgeon's consecutive series of 130 patients (144 hips) was previously reported at five and ten years, reporting three and ten failures, respectively. The aim of this study was to extend the follow-up of this original cohort at 25 years. Methods: The study extends the reporting on the first consecutive 144 resurfacing procedures in 130 patients for all indications. All operations were undertaken between August 1997 and May 1998. The mean age at operation was 52.1 years (SD 9.93; 17 to 76), and included 37 female patients (28.5%). Failure was defined as revision of either component for any reason. Kaplan-Meier survival analysis was performed. Routine follow-up with serum metal ion levels, radiographs, and Oxford Hip Scores (OHSs) was undertaken. Results: Overall implant survival was 83.50% (95% confidence interval (CI) 0.79 to 0.90) at 25 years, and the number at risk was 79. Survival in male patients at 25 years was 89.5% (95% CI 0.83 to 0.96) compared to 66.9% for female patients (95% CI 0.51 to 0.83). Ten additional failures occurred in the period of ten to 25 years. These involved an adverse reaction to metal debris in four patients, a periprosthetic femoral neck fracture affecting five patients, and aseptic loosening in one patient. The median chromium levels were 49.50 nmol/l (interquartile range (IQR) 34 to 70), and the median cobalt serum levels were 42 nmol/l (IQR 24.50 to 71.25). The median OHS at last follow-up was 35 (IQR 10 to 48). During the 25-year study period, 29 patients died. Patient survival at 25 years was 75.10% (95% CI 0.67 to 0.83). Conclusion: This study demonstrates that MoM hip resurfacing using the BHR provides a durable alternative to total hip arthroplasty (THA), particularly in younger male patients with osteoarthritis wishing to maintain a high level of function. These results compare favourably to the best results for THAs.

An evaluation of factors influencing the adoption and usage of robotic surgery in lower limb arthroplasty amongst orthopaedic trainees: a clinical survey.

BACKGROUND: The rise of robotics in orthopaedic training, driven by the demand for better training outcomes and patient care, presents specific challenges for junior trainees due to its novelty and steep learning curve. This paper explores how orthopaedic trainees perceive and adopt robotic-assisted lower limb arthroplasty. METHODS: The study utilised the UTUAT model questionnaire as the primary data collection tool, employing targeted questions on a five-point Likert scale to efficiently gather responses from a large number of participants. Data analysis was conducted using partial least squares (PLS), a well-established method in previous technology acceptance research. RESULT: The findings indicate a favourable attitude amongst trainees towards adopting robotic technology in orthopaedic training. They acknowledge the potential advantages of improved surgical precision and patient outcomes through roboticassisted procedures. Social factors, including the views of peers and mentors, notably influence trainees' decision-making. However, the availability of resources and expert mentors did not appear to have a significant impact on trainees' intention to use robotic technology. CONCLUSION: The study contributes to the understanding of factors influencing trainees' interest in robotic surgery and emphasises the importance of creating a supportive environment for its adoption.

Documentation of neurovascular status in supracondylar fractures and the development of an assessment proforma.

BACKGROUND: Supracondylar fractures are associated with a high incidence of neurovascular complications. Comprehensive clinical evaluation is a necessity when children with these injuries present to the emergency department. Neurovascular assessment can be difficult due to pain, anxiety and the young age of these patients; however, it is crucial findings are well documented to identify patients requiring urgent surgical intervention, in addition to allowing the neurovascular status to be monitored over time. The aim of this study was to evaluate the preoperative neurovascular documentation in children presenting with displaced supracondylar fractures and devise an emergency department assessment proforma to facilitate comprehensive evaluation. METHODS: A retrospective case-note review was performed on patients with Gartland grades 2 and 3 supracondylar fractures observed in a 2-year period from July 2008 to July 2010. RESULTS: 137 patients were included; only 12 patients (8.8%) and 19 patients (13.9%), respectively, had a complete preoperative neurological or vascular assessment documented. Regarding the individual nerves, 59 (43.1%) patients had median nerve integrity documented, 55 (40.1%) ulnar nerve and 49 (35.8%) radial nerve integrity documented. Only 18 patients (13.1%) had their anterior interosseous nerve (AIN) function documented. CONCLUSIONS: Preoperative documentation of neurovascular status in children with displaced supracondylar fractures was poor. Documentation of AIN examination was particularly poor. The introduction of a proforma (Liverpool upper limb fracture assessment) is proposed to increase documentation of neurovascular assessment and optimise emergency department evaluation of children presenting with upper limb injuries.

Technical note-the use of an inclinometer to accurately guide intra-operative femoral de-rotational osteotomies.

Femoral de-rotational osteotomies are a safe and effective treatment for symptomatic excessive femoral anteversion or retroversion. The author's preferred technique for performing a de-rotational osteotomy is via a subtrochanteric transverse osteotomy with intramedullary nail fixation. We describe a method for guiding femoral de-rotation correction intra-operatively using a bubble inclinometer.

The feasibility of achieving Elective Care Framework targets for total hip arthroplasty and total knee arthroplasty in Northern Ireland.

AIMS: Waiting times for arthroplasty surgery in Northern Ireland are among the longest in the NHS, which have been further lengthened by the onset of the COVID-19 global pandemic in March 2020. The Department of Health in Northern Ireland has announced a new Elective Care Framework (ECF), with the framework proposing that by March 2026 no patient will wait more than 52 weeks for inpatient/day case treatment. We aimed to assess the feasibility of achieving this with reference to total hip arthroplasty (THA) and total knee arthroplasty (TKA). METHODS: Mathematical modelling was undertaken to calculate when the ECF targets will be achieved for THA and TKA, as well as the time when waiting lists for THA and TKA will be cleared. The number of patients currently on the waiting list and percentage operating capacity relative to pre-COVID-19 capacity was used to determine future projections. RESULTS: As of May 2021, there were 3,757 patients awaiting primary THA and 4,469 patients awaiting primary TKA in Northern Ireland. Prior to April 2020, there were a mean 2,346 (2,085 to 2,610) patients per annum boarded for primary THA, a mean 2,514 (2,494 to 2,514) patients per annum boarded for primary TKA, and there were a mean 1,554 primary THAs and 1,518 primary TKAs performed per annum. The ECF targets for THA will only be achieved in 2030 if operating capacity is 200% of pre COVID-19 pandemic capacity and in 2042 if capacity is 170%. For TKA, the targets will be met in 2034 if capacity is 200% of pre-COVID-19 pandemic capacity. CONCLUSION: This modelling demonstrates that, in the absence of major funding and reorganization of elective orthopaedic care, the targets set out in the ECF will not be achieved with regard to THA and TKA. Waiting times for THA and TKA surgery in Northern Ireland are likely to remain greater than 52 weeks for most of this decade. Cite this article: Bone Jt Open 2022;3(4):302-306.

Patient-Related Outcome Measures (PROMs) With Nonoperative and Operative Management of Morton's Neuroma.

BACKGROUND: Morton's neuroma is associated with chronic pain and disability. There is a paucity of literature regarding patient-related outcome measures (PROMs) in patients managed nonoperatively. We sought to investigate nonoperative and operative management of Morton's neuroma using PROMs in patients with follow-up to 1 year. METHODS: We conducted a prospective observational study and collected data on all patients with a new diagnosis of Morton's neuroma treated from February 2016 until April 2018. Primary outcome measures were the Manchester-Oxford Foot Questionnaire (MOXFQ) for pain, EuroQoL (EQ) time trade-off (TTO), and EQ visual analog scale (VAS) taken preoperatively and at 52 weeks postoperatively. Forty-four patients were treated nonoperatively and 94 patients were treated operatively. RESULTS: Pretreatment and 52-week scores were 55.7 and 43.10 (nonoperative) and 63.7 and 40.1 (operative) for MOXFQ (pain), 0.72 and 0.82 (nonoperative) and 0.68 and 0.82 (operative) for EQ-TTO, and 71.5 and 76.2 (nonoperative) and 73.1 and 68.7 (operative) for EQ-VAS. There was a statistically significant improvement in MOXFQ (pain) in nonoperative (P = .02) and operative groups (P < .001). There was a statistically significant improvement in EQ-TTO in the operative group only (P = .01). CONCLUSION: This is the largest study investigating outcomes to 12 months of both nonoperative and operatively managed patients with Morton's neuroma. Both nonoperative and operative management lead to symptom improvement at 12 months. LEVEL OF EVIDENCE: Level III, comparative study.

Injuries in Quidditch: A Prospective Study from a Complete UK Season.

BACKGROUND: Quidditch is a mixed-gender, full-contact sport founded in the USA in 2005, played worldwide by an estimated 25,000 players. It is one of the few mixed-gender full-contact sports, yet there remain few published studies regarding injury rates and patterns. A previous study suggested that the overall rate of injury in quidditch is in line with other contact sports, however raised concerns that female players were sustaining a higher rate of concussion when compared to male players. PURPOSE: To examine injury rates and injury patterns in UK quidditch athletes over the course of a single season. STUDY DESIGN: Prospective epidemiological study. METHODS: Data were prospectively collected by professional first aid staff for the 2017-18 season spanning all major UK tournaments, involving 699 athletes. Anonymized player demographics were collected by an online survey. Time loss injury rates were measured per 1000 athletic exposures (AEs) and hours of play. RESULTS: The overall time loss injury rate was 20.5 per 1000 hours or 8.0 per 1000 AEs. The combined rate of concussion was 7.3 per 1000 hours or 2.8 per 1000 AEs. There was no statistical difference between time loss injuries in males (20.9/1000 hours and 8.1/1000 AEs) and females (13.9/1000 hours and 5.4/1000 AEs) (p=0.30) and no statistical difference between concussion rates in males (n=7) and females (n=4) (p=0.60). CONCLUSIONS: Total time loss injury rates in quidditch appear to be comparable with other full-contact sports such as football. The rate of concussions for both males and females appear higher when compared to other contact sports. LEVEL OF EVIDENCE: 3.

The Usefulness of Procedure-Based Assessments in Postgraduate Surgical Training Within the Intercollegiate Surgical Curriculum Programme; A Scoping Review.

BACKGROUND: Workplace-based assessments are a mandatory component of postgraduate surgical training within the United Kingdom and Ireland. Procedure-based assessments (PBAs) and direct observation of practical skills (DOPS) are integrated within the Intercollegiate Surgical Curriculum Programme online platform and aim to assess trainees' performance in practical surgical skills; no reviews have previously investigated their educational usefulness in postgraduate surgical training. Usefulness was defined by the 5 criteria detailed by Van der Vleuten for determining the usefulness of educational assessment tools: validity; reliability; acceptability to learners and faculty; impact on future learning and practice; and costs (to the individual trainee, the institution, and society at large). METHODS: Scoping review methodology was used to examine the educational usefulness of PBA and DOPS assessments in postgraduate surgical training. A literature search of Ovid MEDLINE, EMBASE, and Web of Science databases was undertaken. The preferred reporting items for systematic reviews and meta-analyses standards for systematic reviews were followed. RESULTS/DISCUSSION: Ten studies met the inclusion criteria, with 1368 trainees and trainers included. A variety of study methodologies were identified. Although there is some evidence for the validity and reliability of both PBA and DOPS assessments, further work is required in both these domains including on the number of assessments required to ensure satisfactory reliability. This is a research priority, especially if these assessments become a component of summative assessment of trainee competency. The literature indicates that these assessments are generally acceptable to learners and faculty but their acceptability is negatively impacted upon by uncertainty over whether these assessments constitute a formative or summative assessment of trainees. With regards to costs, correct use of PBAs does require allocated time and resources to ensure their correct use and this must be factored into trainer and trainee job plans. CONCLUSIONS: PBA and DOPS assessments are educationally useful tools in postgraduate surgical training. Further research is required to determine the number of assessments required to ensure adequate reliability. To ensure the educational benefits of these assessments are not diminished, clarification from postgraduate training schemes is required regarding whether these assessments an assessment for learning or an assessment of learning.

Increased fat depth is not associated with increased risk of surgical complications following total hip arthroplasty.

AIMS: Previous research has demonstrated increased early complication rates following total hip arthroplasty (THA) in obese patients, as defined by body mass index (BMI). Subcutaneous fat depth (FD) has been shown to be an independent risk factor for wound infection in cervical and lumbar spine surgery, as well as after abdominal laparotomy. The aim of this study was to investigate whether increased peritrochanteric FD was associated with an increased risk of complications in the first year following THA. METHODS: We analyzed prospectively collected data on a consecutive series of 1,220 primary THAs from June 2013 until May 2018. The vertical soft tissue depth from the most prominent part of the greater trochanter to the skin was measured intraoperatively using a sterile ruler and recorded to the nearest millimetre. BMI was calculated at the patient's preoperative assessment. All surgical complications occuring within the initial 12 months of follow-up were identified. RESULTS: Females had a significantly greater FD at the greater trochanter in comparison to males (median 3.0 cm (interquartile range (IQR) 2.3 to 4.0) vs 2.0 cm (IQR 1.7 to 3.0); p < 0.001) despite equivalent BMI between sexes (male median BMI 30.0 kg/m2 (IQR 27.0 to 33.0); female median 29.0 kg/m2 (IQR 25.0 to 33.0)). FD showed a weak correlation with BMI (R² 0.41 males and R² 0.43 females). Patients with the greatest FD (upper quartile) were at no greater risk of complications compared with patients with the lowest FD (lower quartile); 7/311 (2.3%) vs 9/439 (2.1%); p = 0.820 . Conversely, patients with the highest BMI (≥ 40 kg/m2) had a significantly increased risk of complications compared with patients with lower BMI (< 40 kg/m2); 5/60 (8.3% vs 18/1,160 (1.6%), odds ratio (OR) 5.77 (95% confidence interval (CI) 2.1 to 16.1; p = 0.001)). CONCLUSION: We found no relationship between peritrochanteric FD and the risk of surgical complications following primary THA. Cite this article: Bone Joint J 2020;102-B(9):1146-1150.