Prophylactic fixation of the contralateral hip in cases of unilateral slipped capital femoral epiphysis (SCFE) remains contentious. Our senior author reported a 10 year series in 2006 that identified a rate of subsequent contralateral slip of 25percnt; when prophylactic fixation was not performed. This led to a change in local practice and employment of prophylactic fixation as standard. We report the 10 year outcomes following this change in practice.

A prospective study of all patients who presented with diagnosis of SCFE between 2004 and 2014 in our region. Intra-operative complication and post-operative complication were the primary outcomes. 31 patients presented during the study period: 16 male patients and 15 female patients. The mean age was 12.16 (8–16, SD 2.07). 25 patients had stable SCFE and 5 had unstable SCFE. Stability was uncertain in 1 patient. 25 patients had unilateral SCFE and 6 had bilateral SCFE. 24 patients who had unilateral SUFE had contralateral pinning performed. 1 unilateral SCFE did not have contralateral pinning performed as there was partial fusion of physis on contralateral side.

In the hips fixed prophylactically there was 1 cases of transient intraoperative screw penetration into the joint and 1 case of minor wound dehiscence. There were no cases or chondrolysis or AVN. There were no further contralateral slips. This change in practice has been adopted with minimal complication. The fixation of the contralateral side is not without risk but by adopting this model the risk of subsequent slip has been reduced from 25percnt; to 0percnt;.

Following the neonatal examination the 6–8 week ‘GP check’ forms the second part of selective surveillance for developmental dysplasia of the hip (DDH) in the UK. We aim to investigate the effectiveness of this 6–8 week examination for DDH.

This is a observational study including all infants born in our region over 5 years. Early presentation was defined as diagnosis within 14 weeks of birth and late presentation after 14 weeks. Treatment record for early and late DDH as well as referrals for ultrasound (US) following the 6–8 week check were analysed. The attendance at the 6–8 week examination in those patients who went on to present with a late DDH was also analysed.

23112 live births, there were 141 confirmed cases of DDH. 400 referrals for ultrasound were received from GP; 6 of these had a positive finding of DDH. 27 patients presented after 14 weeks and were classified as late presentations. 25 of these patients had attended the 6–8 week examination and no abnormality had been identified. The sensitivity of the examination was 19.4%, its specificity was 98% and it had a positive predictive value of 1.5%

For many years the 6–8 week ‘check’ has been thought of as a safety net for those children with DDH not identified as neonates, however we found that 4 out of every 5 children with DDH were not identified. It is essential efforts are made to impove detection as the long term consequences of late presentation can be life changing.

Functional scores are used to clinically assess total hip arthroplasty (THA) and for comparative purposes in orthopaedic literature. Previous pilot work has highlighted patient comorbidity as a potential source of bias in addition to the often-examined factors of age, gender and underlying diagnosis.

We analysed prospectively collected data relating to 217 primary THAs (Tayside Arthroplasty Audit Group database). Sample size was calculated from previous pilot data (significance level 5%, power 80%, effect size 0.25). Proportional stratified sampling was performed including all patient age groups (≤40, 41–55, 56–65, >65) and four fixation classes (cemented, hybrid, uncemented and Birmingham resurfacing). Five year Harris Hip Function Score (HHFS) was the dependent variable; age, sex, underlying diagnosis, BMI, pre-operative HHFS and comorbidity (Functional Comorbidity Index; range 0–8) were co-variates/co-factors.

In univariate analysis, FCI accounted for 11% of the variation in HHFS at 5 years. Regarding patients with FCI 0–1 as a reference group, patients with greater comorbidity had lower HHFS at 5 years (FCI 2–3: −3.95; FCI 4–5: −7.21, FCI ≥6: −6.92). In a multivariable model of HHFS at 5 years, FCI group, diagnosis, pre-operative HHFS, patient age and BMI were significant. HHFS at 5 years was significantly higher in FCI group 0–1 than any other category (2–3 P=0.006, 4–5 P<0.001, ≥6 P=0.002). In total, the model accounted for 29% of variability in HHFS at 5 years.

This is the first statistically robust study to examine the effect of comorbidity on THA function. These results strongly suggest that increasing patient comorbidity is associated with poorer THA function when measured using HHS.

Two significant conclusions can be drawn:

Patient comorbidity should be taken into account pre-operatively when considering potential future THA function.

Adequate perpendicular access to the posterolateral talar dome for osteochondral defect repair is difficult to achieve and a number of different surgical approaches have been described. This cadaveric study examined the exposure available from various approaches to help guide pre-operative surgical planning.

Four surgical approaches were performed in a step-wise manner 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 which allowed perpendicular access with a 2mm k-wire to the lateral surface of the talar dome was measured from the anterior aspect of the talar dome.

The mean antero-posterior diameter of the lateral talar domes included in this study was 45.1mm. An anterolateral approach to the ankle with arthrotomy provided a mean exposure of the anterior 1/3rd of the lateral talar dome. ATFL release increased this to 43.2%. A lateral malleolus osteotomy provided superior exposure (81.5% vs 58.8%) compared to an anterolateral tibial osteotomy.

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 and is recommended for lesions affecting the posterior half of the lateral talar dome.

A multicentre retrospective study of 879 total hip replacements (THR) was undertaken to investigate any differences in outcome between trainee surgeons and consultants. The effect of trainee supervision was also assessed. The primary outcome measures were survivorship and the Harris Hip Score (HHS). Length of stay was a secondary outcome.

Patients were evaluated pre-operatively and at 1, 3, 5, 7 and 10 years post-operatively. Surgical outcome was compared between junior trainees, senior trainees and consultants. The effect of supervision was determined by comparing supervised and unsupervised trainees. There was no significant difference in post-operative HHS among consultants, senior and junior trainees at 1 year (p=0.122), at 3 years (p=0.282), at 5 years (p=0.063), at 7 years (p=0.875), or at 10 years (p=0.924) follow up. Additionally there was no significant difference in HHS between supervised and unsupervised trainees at 1 year (p=0.220), 3 years (p=0.0.542), 5 years (p=0.880), 7 years (p=0.953) and 10-year (p=0.787) follow-up. Comparison of surgical outcome between the supervised and unsupervised trainees also shows no significant difference in hospital stay (p=0.989), or implant survival years (p=0.257). This study provides evidence that when trainees are appropriately supervised, they can obtain equally good results compared with consultants when performing THR.

Introduction

There is a paucity of research investigating the effect of the experience of the operating surgeon on the long term function and survivorship of total hip replacements (THR). With the advent of individualised surgeon data being available to patients via the National Joint Registry, the desire to avoid complications and poor performance grows. This potentially reduces the availability of operative opportunities for trainees as consultants seek to ensure good results.

Introduction

Functional scores are used to clinically assess total hip arthroplasty (THA) and for comparative purposes in the orthopaedic literature. Previous research has highlighted patient age, gender and underlying diagnosis as potential sources of bias but comorbidity has not been considered. The Functional Comorbidity Index (FCI) is a published epidemiological tool which correlates disease with associated physical function deficit. It scores 18 conditions: one point for each, total score 0–18.

Blood tests including liver function tests (LFTs), C-reactive protein (CRP), coagulation screens and international normalising ratios (INR) are frequently requested investigations that complement the surgical and anaesthetic pre-operative assessment of patients. The paucity of guidance available for blood requesting in acute trauma and orthopaedic admissions can lead to inappropriate requesting practices and over investigation. Unnecessary tests place an economic burden on a hospital and repeated venepuncture is unpleasant for patients.

We audited blood requesting practices and with multidisciplinary input developed guidelines to improve practice which were subsequently implemented.

Admissions over a period of one month to Ninewells Hospital and Perth Royal Infirmary were audited retrospectively. The frequency and clinical indications for LFTs, coagulation screens/INR and CRP for the duration of the patient's admission were recorded. Re-audit was carried out for one month after the introduction of the guidelines.

216 patients were included in January and 236 patients in September 2014. Total no. of LFTs requested: January 895, September 336 (−62.5%). Total no of coagulation screens/INR requested: January 307, September 210 (−31.6%). Total number of CRPs requested: January 894, September 317 (−64.5%). No. of blood requests per patient: January (M=4.81, SD 4.75), September (M=3.60, SD = 4.70). A significant decrease was observed in admission requesting and subsequent monitoring (p<0.01) for LFTs, coagulation screens/INR, CRP when the guidance was introduced.

The implementation of the bloods guidance resulted in a large reduction in admission requesting and subsequent monitoring without incident. The cost of investigation was significantly reduced, as were venepuncture rates.

Methicillin Resistant Staphylococcus Aureus (MRSA) screening has reduced rates of MRSA infection in primary total hip (THR) and total knee (TKR) replacements. There are reports of increasing methicillin resistance (MR) in Coagulase Negative Staphylococci (CNS) causing arthroplasty infections. We examined microbiological results of all 2-stage THR/TKR revisions in Tayside from 2001–2010.

72 revisions in 67 patients were included; 30 THRs and 42 TKRs. Mean ages at revision were 89 and 72 years respectively. Male: female ratio 1.4:1.2-year survivorship for all endpoints: 96% in THRs and 88% in TKRs. 5-year survival: 83% and 84% respectively.

The most common organisms were SA (30%) and CNS (29%). Antibiotic resistance was more common amongst CNS. 72% of CNS were resistant to Methicillin versus 20% of SA. 80% of CNS were resistant to Gentamicin OR Methicillin versus 20% of SA. 32% (8/72 cases or 11% overall) of CNS were resistant to BOTH Gentamicin AND Methicillin, the primary arthroplasty antibiotic prophylaxis in our region, versus 4% of SA.

Harris Hip Scores and Knee Society Scores were lower post primary, prior to symptoms of infection in patients who had MR organisms cultured compared with those who had methicillin sensitive organisms. One-year post revision both groups recovered to similar scores.

Our data suggest MR-CNS cause significantly more arthroplasty infections than MRSA. Patients developing MR infections tend to have poorer post-primary knee and hip scores before symptoms of infection fully develop. 32% of CNS causing arthroplasty infections in our region are resistant to current routine primary antibiotic prophylaxis.

Two stage revision for infection is considered the gold standard with a success rate of 80–90%. Overall functional outcomes of these patients are commonly overlooked. There is a trend towards single stage revision to improve functional outcomes.

We examined the functional scores of 2 stage revision for total hip arthroplasty (THR) and total knee arthroplasty (TKR). 72 revisions were identified over 9 years: 30 THR and 42 TKR. Two year survivorship was 96% in THR revision and 88% TKR revision. Five year survival was 83% and 84% respectively. 50 patients (without recurrence of infection) had recorded functional scores at a minimum of 1 year.

The mean Harris-hip score (HHS) of THR was 75 (21 patients) prior to developing symptoms of infection. Once infected, the mean score fell to 46. At 1 year post revision it returned to 77. At 3 years HHS of 78 (12 patients) and at 5 yrs 62 (3 patients).

The mean knee society score (KSS) of TKR was 66 (29 patients) prior to developing symptoms of infection. Once infected, the mean score fell to 34. At 1 year post revision it returned to 73. At 3 years KSS of 76 (16 patients) and at 5 years 62 (10 patients).

We conclude that functional scores of staged revisions of infected THR and TKR return to pre-morbid levels within a year of completing the second stage. Although single stage revision may have a quicker return to function, by 1 year, staged revision has comparable results.

Two stage revision for infection is considered the gold standard with a success rate of 80 to 90%. Overall functional outcomes of these patients tends to be overlooked. There is a trend towards single stage revision to improve functional outcomes.

We examined the functional scores of 2 stage revision for total hip arthroplasty (THR) and total knee arthroplasty (TKR) revision over nine years.

Seventy-two revisions were identified: 30 THR and 42 TKR. Two year survivorship was 96% in THR revision and 88% TKR revision. Five year survival was 83% and 84% respectively. 50 patients (without recurrence of infection) had recorded functional scores at a minimum of 1 year.

The mean Harris-hip scores (HHS) of 21 THR were 75 prior to developing symptoms of infection. Once infected, the mean score fell to 46. At 1 year post revision it returned to 77. At 3 years HHS of 78 (12 patients) and at 5 yrs 62 (3 patients).

The mean knee society scores (KSS) of 29 TKR were 66 prior to developing symptoms of infection. Once infected, the mean score fell to 34. At 1 year post revision it returned to 73. At 3 years KSS of 76 (16 patients) and at 5 years 62 (10 patients).

We conclude that functional scores of two-stage revisions of infected THR and TKR return to pre-morbid levels within a year of completing the second stage. Although single stage revision may have a quicker return to function, by 1 year, a staged revision has comparable results.

Introduction

New methods to reduce inpatient stay, post-operative complications and recovery time are continually being sought in surgery. Many factors affect length of hospital stay, such as, analgesia, patient and surgeon expectations, as well as provision of nursing care and physiotherapy. Development of the use of postoperative local anaesthetic infiltration delivered intra-articularly by a catheter appears to be an effective analgesic method which reduces patient's opioid requirements and allows early physiotherapy without motor blockade of muscles. Our study aimed to explore if the use of local anaesthetic infiltration intra-articularly following joint athroplasty affected the patient's duration of hospitalisation.

We have encountered radiological reports of ‘normal Graf α-angles’ when the femoral head was subluxed. We therefore developed a simple method to determine femoral/acetabular congruency known as the 50/50 method. We compare our method to the established Graf method.

Two identical, randomly assorted sets of 100 ultra-sonograms were evaluated. All ultrasonograms were of patients under 3 months of age within our DDH screening program. The images were assessed to be either ‘normal’ or ‘abnormal’ by 6 FY1’s using each method after reading brief instructions. (Images were classified as normal or abnormal by consensus between an orthopaedic consultant and radiologist who also examined and preformed dynamic screening on each infant).

The mean proportion of abnormal scans with agreement and normal scans with agreement was 0.52 (95% CI 0.39–0.69) and 0.92 (CI 0.87–0.96) respectively, indicating moderate agreement (kappa 0.41, CI 0.12–0.71) for inter-observer variability using the Graf method. On average the inter-observer variability using the 50/50 method for abnormal and normal scans with agreement was 0.60 (CI 0.35–0.84) and 0.92 (95% CI 0.85–0.99) respectively with moderate agreement (kappa 0.50, CI 0.20–0.80). Intra-observer variability between the Graf and 50/50 methods revealed moderate agreement (mean kappa 0.41, CI 0.17–0.66) with the average proportion of abnormal and normal scans with agreement of 0.50 (CI 0.32–0.69) and 0.91 (CI 0.83–0.98) correspondingly. The accuracy of each test was equal, ranging from 84% to 93%.

The 50/50 method is straightforward to both use and teach. Moreover, it successfully serves as “red dot” system to flag up abnormal hips at clinic. The 50/50 method is at least as good as Graf with regard to accuracy, inter-observer and intra-observer variability. We recognise that dynamic screening remains the gold standard.