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Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_31 | Pages 36 - 36
1 Aug 2013
Herd J Joseph J McGarvey M Tsimbouri P Bennett A Meek R Morrison A
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Allogenic blood is a finite resource, with associated risks. Previous studies have shown intra-operative cell salvage (ICS) can reduce allogenic transfusion rates in orthopaedic surgery. However, recent concerns regarding the efficacy and cost-effectiveness of ICS mean we must continually re-assess its usefulness in current practice. This study was carried out to review the use of ICS, to establish if its use has led to a reduction in patient exposure to post-op allogenic transfusion. All orthopaedic patients who underwent ICS and re-infusion between 2008–2010 in the Southern General Hospital (SGH) were audited. The Haemoglobin (Hb) drop, volume of blood re-infused and post-op allogenic transfusion rates were recorded. The revision hip group was compared to a similar SGH cohort, who underwent surgery by the same surgeons between 2006–2008, and a pre-2005 control group. The Cell Saver (Haemonetics) machine was used. The proportion of patients who received a post-op allogenic transfusion fell by 55% in the 2008–2010 ICS cohort compared with the control, and by 40% compared with the previous ICS study group. In both instances, this was accompanied by a statistically significant (p<0.001) reduction in mean number of units transfused per patient. ICS has been shown to be effective in reducing rates and volume of post-op allogenic transfusion in patients undergoing revision hip surgery at the SGH. ICS has been used with increasing efficiency over time


Orthopaedic Proceedings
Vol. 105-B, Issue SUPP_9 | Pages 94 - 94
17 Apr 2023
Gupta P Butt S Dasari K Galhoum A Nandhara G
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The Nottingham Hip Fracture Score (NHFS) was developed in 2007 as a predictor of 30-day mortality after hip fracture surgery following a neck of femur fracture. The National Hip Fracture Database is the standard used which calculated their own score using national data. The NHF score for 30-day mortality was calculated for 50 patients presenting with a fractured neck femur injury between January 2020 to March 2020. A score <5 was classified as low risk and >/=5 as high risk. Aim was to assess the accuracy in calculating the Nottingham Hip Fracture Score against the National Hip Fracture Database. To explore whether it should it be routinely included during initial assessment to aid clinical management?. There was an increase in the number of mortalities observed in patients who belonged to the high-risk group (>=5) compared to the low risk group. COVID-19 positive patients had worse outcomes with average 30-day mortality of 6.78 compared to the average of 6.06. GEH NHF score per month showed significant accuracy against the NHFD scores. The identification of high-risk groups from their NHF score can allow for targeted optimisations and elucidation of risk factors easily gathered at the point of hospitalisation. The NHFS is a valuable tool and useful predictor to stratify the risk of 30-day mortality and 1-year mortality after hip fracture surgery. Inclusion of the score should be considered as mandatory Trust policy for neck of femur fracture patients to aid clinical management and improve patient safety overall


The Journal of Bone & Joint Surgery British Volume
Vol. 88-B, Issue 6 | Pages 832 - 836
1 Jun 2006
Barker R Takahashi T Toms A Gregson P Kuiper JH

The use of impaction bone grafting during revision arthroplasty of the hip in the presence of cortical defects has a high risk of post-operative fracture. Our laboratory study addressed the effect of extramedullary augmentation and length of femoral stem on the initial stability of the prosthesis and the risk of fracture.

Cortical defects in plastic femora were repaired using either surgical mesh without extramedullary augmentation, mesh with a strut graft or mesh with a plate. After bone impaction, standard or long-stem Exeter prostheses were inserted, which were tested by cyclical loading while measuring defect strain and migration of the stem.

Compared with standard stems without extramedullary augmentation, defect strains were 31% lower with longer stems, 43% lower with a plate and 50% lower with a strut graft. Combining extramedullary augmentation with a long stem showed little additional benefit (p = 0.67). The type of repair did not affect the initial stability. Our results support the use of impaction bone grafting and extramedullary augmentation of diaphyseal defects after mesh containment.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXXVI | Pages 42 - 42
1 Aug 2012
Alexander P Ford I Ashcroft G Watson H
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The reinfusion of perioperative cell salvage is one method employed to reduce exposure to donor blood. Data on the safety of this process, however, are scant. Notably, the effect of intraoperative, washed cell salvage reinfusion on prothrombotic markers has not been demonstrated. The risk of postoperative venous thromboembolism following major orthopaedic operations is not insignificant. The study objective was to assess the effect of cell salvage reinfusion on coagulation and platelet activation.

Twenty-one patients undergoing elective primary hip operations were recruited. Nine patients received washed cell salvage intraoperatively, and were compared with 12 patients undergoing similar surgery that did not. Two patients in the cell salvage group also received postoperative, unwashed cell salvage. Blood samples were collected pre-operatively, immediately post-operatively, and one day post-operatively for assays of platelet activation markers, P-selectin expression and fibrinogen binding by flow cytometry in diluted whole blood; coagulation activation marker, thrombin-antithrombin complex (TAT); D-dimer by ELISA, thrombin generation by chromogenic assay, and full blood count. Samples of cell salvage material were also analysed for prothrombotic markers.

There were no significant differences between the groups preoperatively. Postoperatively haemoglobin levels did not differ significantly between the cell salvage group and controls. Postoperative TAT and D-dimer were significantly higher in the cell salvage group compared with controls (p<0.05). One day postoperatively, there were significantly higher platelet P-selectin expression (p=0.006) and platelet fibrinogen binding (p=0.004) in the cell salvage group compared with controls. The white cell count (WCC) was also significantly higher (p=0.04). In the intraoperative washed cell salvage material, and in postoperative cell salvage, the platelet count was low, but significant proportions of platelets were activated, and levels of D-dimer were elevated compared with venous blood. The postoperative salvage material also contained high levels of TAT.

The results from this pilot study show the induction of a prothrombotic state following reinfusion of intraoperative, washed cell salvage in recipients undergoing primary elective hip operations. An inflammatory response to reinfusion is also indicated by the raised WCC. Further investigation into the safety of cell salvage is indicated.


Orthopaedic Proceedings
Vol. 100-B, Issue SUPP_15 | Pages 135 - 135
1 Nov 2018
Galbraith A Glynn S Coleman C Murphy C
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The international literature base demonstrates that individuals living with diabetes mellitus (DM) are at increased risk of mortality and post-operative complications following hip fracture surgery (HFS) than non-diabetics. Studies investigating databases in American, European or Asiatic populations highlight the impact geography can have on the resultant investigation. We aim to quantify the impact DM has on HFS patients in a single university hospital. The HIPE dataset of fragility fractures occurring in Galway University Hospital from 2014–2016 were analysed and cross referenced with hospital laboratory and public databases. A database of 759 individuals was created including 515 females and 237 males, with a mean age of 78+/−12.2 years, of which 110 patients had DM. The patient length-of-stay (PLOS) was comparable in all groups with patient age being the primary influencing factor. An extended PLOS correlated with an increased long-term mortality. A trend toward increased occurrence of sub-trochanteric fractures was observed in diabetics with fewer periprosthetic and intertrochanteric fractures. Patients with DM had a significant increased risk of post-operative mortality compared to non-diabetics. Males with DM where at a greater risk of death after HFS [HR 2.29, 95% CI 1.26–4.17. p=0.006] than females with DM [HR 1.69, 95% CI 0.99–2.91. p=0.056]. The presence of DM did not directly impact a patient's PLOS or increase the need for a re-operation. DM is associated with increased post-operative patient mortality and may influence the anatomical fracture pattern. This observation will support further investigation into the mechanical and biochemical changes occurring in the femur in individuals living with DM


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_13 | Pages 63 - 63
1 Mar 2013
Boutefnouchet T Budair B Qadri Q
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Introduction. Delay, postponing and cancellation of hip fracture surgery leads to unnecessary starvation and adverse effects on patients and resources. Best Practice Tariffs (BPT) have been introduced to incentivise organisation into optimising the overall care for this type of injuries. Methods. Retrospective observational analysis of all consecutive cases of hip fractures over a period of 18 months; this period spanned the introduction of BPT: 10 months before and 8 months after. Data on delay, postponing and cancellation of surgery were recorded and analysed. Results. Total of 584 cases with a surgery cancellation rate of 21% (n=121). Top three reasons for cancellation: 48% medically unfit, 32 % lack of operating time, 6% patient unprepared. Rate of surgery cancellation pre-BPT 26% (n=85), post-BPT 14% (n=36). Top three reasons for cancellation pre vs. post BPT were respectively: medically unfit 48% vs. 47%, lack of operating time 32% vs. 33%, patient unprepared 6% vs. 8%. Mean time from admission to surgery was in pre-BPT: 43.03 hours, in post-BPT: 34.33 hours. Surgery occurred at ≥36 hours after admission in 43.3% (first group), in 25% (second group). Lack of operating theatre time as reason for delay in surgery dropped from 37% to 20%. In contrast, the rate of theatre list overrun increased from 7% to 16%. Conclusions. According to our district general hospital experience; the implementation of national guidelines and financial incentives helped reduce time delay and rate of cancellation of hip fracture surgery. These changes were achieved despite access to the same level of resources


Orthopaedic Proceedings
Vol. 105-B, Issue SUPP_7 | Pages 43 - 43
4 Apr 2023
Knopp B Harris M
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Tip-apex distance (TAD) has long been discussed as a metric for determining risk of failure in fixation of peritrochanteric hip fractures. This study seeks to investigate risk factors including TAD for hospital readmission one year after hip fixation surgery. A retrospective review of proximal hip fractures treated with single screw intramedullary devices between 2016 and 2020 was performed at a 327 bed regional medical center. Patients included had a postoperative follow-up of at least twelve months or surgery-related complications developing within that time. 44 of the 67 patients in this study met the inclusion criteria with adequate follow-up post-surgery. The average TAD in our study population was 19.57mm and the average one year readmission rate was 15.9%. 3 out of 6 patients (50%) with a TAD > 25mm were readmitted within one year due to surgery-related complications. In contrast, 3 out of 38 patients (7.9%) with a TAD < 25mm were readmitted within one year due to surgery-related complications (p=0.0254). Individual TAD measurements, averaging 22.05mm in patients readmitted within one year of surgery and 19.18mm in patients not readmitted within one year of surgery were not significantly different between the two groups (p=0.2113). Our data indicate a significant improvement in hospital readmission rates up to one year after hip fixation surgery in patients with a TAD < 25mm with a decrease in readmissions of over 40% (50% vs 7.9%). This result builds upon past investigations by extending the follow-up time to one year after surgery and utilizing hospital readmissions as a metric for surgical success. With the well-documented physical and financial costs of hospital readmission after hip surgery, our study highlights a reduction of TAD < 25mm as an effective method of improving patient outcomes and reducing financial costs to patients and medical institutions


Orthopaedic Proceedings
Vol. 106-B, Issue SUPP_18 | Pages 22 - 22
14 Nov 2024
Bulut H Tomey D
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Introduction. The concept of same-day discharge has garnered increasing significance within orthopedic surgery, particularly in hip and knee procedures. Despite initial concerns surrounding the absence of prolonged hospital care, a burgeoning body of evidence highlights numerous advantages associated with same-day discharge, ranging from mitigating in-hospital infections to offering substantial financial and psychosocial benefits for both patients and healthcare providers. In this study, we aim to scrutinize the trends in same-day discharge specifically within the realm of total hip arthroplasties. Method. This retrospective analysis delves into the American College of Surgeons National Surgical Quality Improvement Program (ACS NSQIP) database spanning from 2017 to 2021. Leveraging patient data sourced from the ACS NSQIP database, we sought to elucidate patterns and shifts in same-day discharge practices pertaining to total hip arthroplasties. Result. The preoperative analysis illuminated several notable disparities between patients undergoing same-day hip arthroplasty and those necessitating hospitalization. Notably, same-day hip patients skewed younger, comprising 48.3%females compared to 55.6% in hospitalized hip patients. Furthermore, a lower prevalence of medical comorbidities such as diabetes mellitus (8.5% vs.12.9%), current smoking (9.3% vs. 12.2%), and severe COPD(1.9% vs. 4.1%) was observed among same-day hip group. Operatively, same-day hip surgeries boasted shorter durations, averaging 83.9 minutes, in contrast to the 92.3minutes for hospitalized hip procedures. Postoperatively, same-day hip patients exhibited significantly diminished rates of 30-day readmissions (1.7%vs. 3.5%), procedure-related readmissions (1.0%vs.2.1%), reoperations (1.1%vs.1.9%), and mortality (0.02% vs. 0.04%). Moreover, the prevalence of the same-day discharge concept experienced a remarkable ascent from 2016 to 2021, with rates escalating from 1.5% to 25.6% of all total hip arthroplasties over a span of just six years. Conclusion. In conclusion, same-day discharge is a feasible and safe option for selected THA patients


Orthopaedic Proceedings
Vol. 106-B, Issue SUPP_1 | Pages 78 - 78
2 Jan 2024
Ponniah H Edwards T Lex J Davidson R Al-Zubaidy M Afzal I Field R Liddle A Cobb J Logishetty K
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Anterior approach total hip arthroplasty (AA-THA) has a steep learning curve, with higher complication rates in initial cases. Proper surgical case selection during the learning curve can reduce early risk. This study aims to identify patient and radiographic factors associated with AA-THA difficulty using Machine Learning (ML). Consecutive primary AA-THA patients from two centres, operated by two expert surgeons, were enrolled (excluding patients with prior hip surgery and first 100 cases per surgeon). K- means prototype clustering – an unsupervised ML algorithm – was used with two variables - operative duration and surgical complications within 6 weeks - to cluster operations into difficult or standard groups. Radiographic measurements (neck shaft angle, offset, LCEA, inter-teardrop distance, Tonnis grade) were measured by two independent observers. These factors, alongside patient factors (BMI, age, sex, laterality) were employed in a multivariate logistic regression analysis and used for k-means clustering. Significant continuous variables were investigated for predictive accuracy using Receiver Operator Characteristics (ROC). Out of 328 THAs analyzed, 130 (40%) were classified as difficult and 198 (60%) as standard. Difficult group had a mean operative time of 106mins (range 99–116) with 2 complications, while standard group had a mean operative time of 77mins (range 69–86) with 0 complications. Decreasing inter-teardrop distance (odds ratio [OR] 0.97, 95% confidence interval [CI] 0.95–0.99, p = 0.03) and right-sided operations (OR 1.73, 95% CI 1.10–2.72, p = 0.02) were associated with operative difficulty. However, ROC analysis showed poor predictive accuracy for these factors alone, with area under the curve of 0.56. Inter-observer reliability was reported as excellent (ICC >0.7). Right-sided hips (for right-hand dominant surgeons) and decreasing inter-teardrop distance were associated with case difficulty in AA-THA. These data could guide case selection during the learning phase. A larger dataset with more complications may reveal further factors


Bone & Joint 360
Vol. 12, Issue 5 | Pages 49 - 50
1 Oct 2023
Marson BA

This edition of Cochrane Corner looks at some of the work published by the Cochrane Collaboration, covering pharmacological interventions for the prevention of bleeding in people undergoing definitive fixation or joint replacement for hip, pelvic, and long bone fractures; interventions for reducing red blood cell transfusion in adults undergoing hip fracture surgery: an overview of systematic reviews; and pharmacological treatments for low back pain in adults: an overview of Cochrane Reviews


Orthopaedic Proceedings
Vol. 105-B, Issue SUPP_8 | Pages 145 - 145
11 Apr 2023
Mariscal G Jover N Balfagón A Barrés M
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Solid organ transplant (SOT) recipients present an increased medical risk; however, few studies analyze the outcomes of these patients undergoing hip fracture surgery. This study aimes to determine the incidence of hip fracture in SOT patients and to compare the outcomes of SOT patients with matched non-SOT controls after hip fracture fixation. A retrospective review identified 20 SOT patients with hip fracture at a single center from 2016 to 2021 and were matched (1:1) with a cohort of 20 patients with hip fracture without SOT. Patient outcomes, mortality/survival and clinical outcomes were compared between two groups. The incidence of hip fracture in SOT patients was 20/1787, 1.1%. There were significant differences in mortality rate (73.3% SOT group vs. 26.7% non-SOT group; p<0.05). There were no differences in survival time (p=0.746). There were no differences in time to surgery (5.0 days SOT group vs. 3.1 days non-SOT group; p=0.109), however, there were significant differences in the hospital length of stay (14 days SOT group vs. 8.6 days non-SOT group; p=0.018). There were no differences regarding the complication rate between the two groups (9/20, 45% vs. 6/20, 30% in the SOT and non-SOT groups, respectively). SOT patients with associated hip fracture required longer hospital length of stay than non-SOT patients. SOT patients did not show greater clinical complications; however, they presented higher mortality rate compared to non-SOT patients


Orthopaedic Proceedings
Vol. 103-B, Issue SUPP_4 | Pages 38 - 38
1 Mar 2021
Nikolaou V Floros T Sourlas I Pappa E Kaseta M Babis G
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This study aims to investigate that a single dose of tranexamic acid (TXA) will reduce blood loss and transfusion rates in elderly patients, undergoing intertrochanteric (IT) or femoral neck fractures surgery. Consecutive elderly patients receiving hip fracture surgery for stable or unstable IT fracture, treated with short intramedullary nail (IMN) insertion as well as cemented hemiarthroplasty for acute femoral neck (subcapital) hip fracture, were screened for inclusion in this single-centre randomized trial. Patients were randomly allocated to a study group by sealed envelope. One TXA dose of 15 mg/kg i.v. diluted in 100 ml N/S or one placebo dose i.v. in 100 ml N/S were administered 5 mins before the skin cut. Haemoglobin (Hb) concentration was measured at admission time and prior to surgery. Post-operatively it was measured on a daily basis until day 4, giving a total of four Hb measurements (days 1 to 4). The transfusion trigger point was determined in accordance with the French guidelines for erythrocyte blood transfusion. The transfusion trigger was 10 g/dl for patients at risk, while in all other cases, it was 9 g/dl. Information regarding the transfusions number was assessed directly by the hospital blood bank database. Blood loss was calculated by the Hb dilution method. Nadler's formula was used to calculate patients' blood volume. For calculation of total blood loss (TBL) expressed to total Hb loss and total Volume loss, the number of transfusions (55 grams of Hb per transfusion), the Hb concentration on preoperatively (Hgbi) and the Hb concentration on the last measure (Hgbe) were used. (Hb balance method). The primary efficacy outcome was the number of transfusions of allogeneic RBC from surgery up to day 4. The secondary ones were the total blood loss from surgery to day 4 as it was calculated by Hb-balance method. After randomization, 35 patients with femoral neck fracture and 30 patients with IT fracture received TXA prior to surgery. Respectively, 30 patients with femoral neck fracture and 55 with IT fracture didn't receive TXA. The groups did not differ significantly in their basic demographics (age, gender, BMI, injury mechanism, ASA score, co-morbidities). Results showed that patients undergoing hemiarthroplasty after receiving TXA, were transfused with less allogeneic RBC and had less total blood loss than patients that didn't receive TXA, but without statistical significance. While patients treated with IMN in the TXA group received a significantly lower number of RBC units than the control group (1.28 ± 1.049 vs 2.075 ± 1.685), (P = 0.0396), had a significantly lower loss of Hb (98.59 ± 55.24 vs 161.6 ± 141.7), (P = 0.0195) and a lower total blood volume loss (951.3 ± 598.9 ml vs 1513 ± 1247 ml), (P = 0.023). This trial confirmed TXA administration efficacy in reducing blood loss and transfusion rate in elderly patients undergoing hip fracture surgery. A TXA single dose may be a safer option, taking into account these patients' physiological status and co-morbidities


Bone & Joint 360
Vol. 12, Issue 6 | Pages 49 - 51
1 Dec 2023
Burden EG Whitehouse MR Evans JT


Orthopaedic Proceedings
Vol. 100-B, Issue SUPP_16 | Pages 67 - 67
1 Nov 2018
Güngörürler M Havıtçıoğlu H
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After total hip replacement, force generating capacity of gluteal muscles is an impotant parameter on joint contact forces and primary fixation of total hip replacement. Femoral offset is an option to optimize muscle moment arms, especially main abductor Gluteus Medius and Minimus. To investigate relationship with weak gluteal muscles (Gluteus Medius and Minimus) and increased femoral offset, we build a musculoskeletal model. Creating of three-dimensional femur geometry and scaling of the musculoskeletal model according to the subject were performed with computed tomography data. Obtained gait kinematic and kinetic data were applied and to mimic gluteal muscle weakness, the force generating capacities of Gluteus Medius and Minimus reduced (%20-%80). Analysis were done for both anatomical and +10mm offset. Then, muscle and joint reaction forces obtained from musculoskeletal analysis transfered to CT based finite element model to evaluate changes in maximum principle stresses on femur. According to the results of the musculoskeletal analysis, the weakness of the gluteal muscles caused an increase in the activation of Gluteus Maximus, Rectus Femoris and Tensor Fasciae Latae. Effects of +10 mm femoral offset on total abductor muscle activity increased with reduced muscle strength. As a result of the finite element analysis, no significant difference was observed for maximum principle stresses on femur with varying muscle activites. The results of these analyses are important to understand weakness of gluteal muscles and for planning hip surgery


Orthopaedic Proceedings
Vol. 99-B, Issue SUPP_2 | Pages 26 - 26
1 Jan 2017
Lenguerrand E Wylde V Brunton L Gooberman-Hill R Blom A Dieppe P
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Physical functioning in patients undergoing hip surgery is commonly assessed in three ways: patient-reported outcome measure (PROM), performance test, or clinician-administered measure. It is recommended that several types of measures are used concurrently to capture an extended picture of function. Patient fatigue and burden, time, resources and logistical constraints of clinic and research appointments mean that collecting multiple measures is seldom feasible, leading to focus on a limited number of measures, if not a single one. While there is evidence that performance-tests and PROMs do not fully correlate, correlations between PROMs, performance tests and clinician-administrated measures are yet to be evaluated. It is also not known if the associations between function and patient characteristics depend on how function is measured. The aim of our study was to use different measures to assess function in the same group of patients before their hip surgery to determine 1. how well PROMs, performance tests and clinician-administrated measures correlate with one another and 2. Whether these measures are associated with the same patient characteristics. We conducted a cross-sectional analysis of the pre-operative information of 125 participants listed for hip replacement. The WOMAC function subscale, Harris Hip Score (HHS) and walk-, step- and balance-tests were assessed by questionnaire or during a clinic visit. Participant socio-demographics and medical characteristics were also collected. Correlations between functional measures were investigated with correlation coefficients (r). Regression models were used to test the association between the patient's characteristics and each of the three types of functional measures. None of the correlations between the PROM, clinician-administrated measure and performance tests were very high (r<0.90). The highest correlations were found between the WOMAC-function and the HHS (r=0.7) or the Walk-test (r=0.6), and between the HHS and the walk-test(r=0.7). All the other performance-tests had low correlations with the other measures(r ranging between 0.3 and 0.5). The associations between patient characteristics and functional scores varied by type of measure. Psychological status was associated with the WOMAC function (p-value<0.0001) but not with the other measures. Age was associated with the performance test measures (p-value ranging from ≤0.01 to <0.0001) but not with the WOMAC function. The clinician-administered (HHS) measure was not associated with age or psychological status. When evaluating function prior to hip replacement clinicians and researchers should be aware that each assessment tool captures different aspects of function and that patient characteristics should be taken into account. Psychological status influences the perception of function; patients may be able to do more than they think they can do, and may need encouragement to overcome anxiety. A performance test like a walk-test would provide a more comprehensive assessment of function limitations than a step or balance test, although performance tests are influenced by age. For the most precise description of functional status a combination of measures should be used. Clinicians should supplement their pre-surgery assessment of function with patient-reported measure to include the patient's perspective


Orthopaedic Proceedings
Vol. 99-B, Issue SUPP_9 | Pages 20 - 20
1 May 2017
Fletcher J Evans S
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Background. Devices are frequently used to gain sufficient purchase in a bone so that the bone itself can be manipulated to move or rupture soft tissue attachments. During hip surgery, several different extraction corkscrews are available to remove the femoral head, each with a different screw design with no evidence to suggest which is most effective. Additionally during the use of corkscrew devices, often due to the low bone density, stripping of the screw threads out of the femoral head can occur prior to its extraction, thus requiring reinsertion. The aims of this project were to measure the primary pullout and reinsertional forces of five commercially available corkscrews. Methods. Polyurethane bone models covering a spectrum of osteoporotic to normal bone densities (0.08 gcm-3, 0.16 gcm-3 and 0.32 gcm-3) were used in axial tensile testing at two insertional depths to assess the maximum pullout force of these corkscrews (Zimmer, Stryker, Medacta, JRI, Depuy). Results. There are significant differences between the pullout forces produced throughout the different densities at both insertional depths; 0.08gcm-3 (p=0.002), 0.16 gcm-3 (p<0.001) and 0.32 gcm-3 (p=0.006). Reinsertional testing on all corkscrews demonstrated a reduction in the pullout force of approximately 70%, underlining the benefit of effective insertion and extraction on the first attempt. Conclusion. In all bone model densities, consistent differences in the pullout forces generated were identified. All the corkscrews generate forces greater than the estimated forces required to yield the soft tissues attached to a femoral head. Further work into optimising the corkscrew design, especially regarding the torque generated during insertion, will improve the efficacy of future corkscrew use. This information should be transferable to other situations where manipulation of a bone is needed at the temporary or permanent expense of the attached soft tissues. Level of Evidence. V: Biomechanical study


Orthopaedic Proceedings
Vol. 99-B, Issue SUPP_8 | Pages 2 - 2
1 Apr 2017
Blackburn J Lim D Harrowell I Parry M Blom A Whitehouse M
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Background. Over 96% of primary total hip replacements (THR) recorded in the National Joint Registry (NJR) are performed through a posterior or lateral surgical approach. There is no high quality evidence available to support the use of one approach over the other in primary THR and even less evidence when the outcome of revision THR is considered. Methods. Questionnaires were sent to 267 patients who had revision hip replacements between January 2006 and March 2010 for aseptic loosening. They rated their pain from 0–10, and used the Self-Administered Patient Satisfaction Scale (SAPS), Oxford Hip Score (OHS), Western Ontario and McMaster University Osteoarthritis Index (WOMAC) and Short form-12 (SF-12). Results. We performed 275 revision total hip replacements for aseptic loosening on patients in whom the primary operation details were available. Their mean age was 69 years (SD12) with 43% male and 57% right-sided procedures. 205 patients responded to our questionnaires (209/275 hips, 76%). Unfortunately 19 patients had died, 4 had dementia and 13 declined to participate. We were unable to contact a further 33.Grouping by approach, 20% (43/209) had primary and revision lateral approaches, 20% (43/209) had primary lateral and revision posterior and 60% (123/209) had both primary and revision via posterior approaches. The WOMAC and OHS were significantly better in patients who had a posterior approach for both primary and revision surgery, compared to those that did not (OHS p=0.028, WOMAC p=0.026). We found no significant differences in pain, satisfaction or health-related quality of life between the groups. Conclusions. Registry data may help further explore the relationship between surgical approach and outcome in revision hip surgery. A randomised controlled trial of the posterior versus lateral approach for revision surgery would provide a definitive answer. Level of Evidence. 2b - retrospective cohort study. Disclosures. No financial disclosures or conflicts of interests from any authors


Orthopaedic Proceedings
Vol. 100-B, Issue SUPP_16 | Pages 49 - 49
1 Nov 2018
Ng KCG
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Several previous pathoanatomical and biomechanical studies focused primarily on the cam morphology as the primary contributor to symptoms of femoroacetabular impingement (FAI) and limited range of motion. However, there is a growing population of individuals with asymptomatic cam morphologies who show no clinical signs; thus, the cam deformity, alone, may not fully delineate an individual's symptomatology or limited motion. These studies expanded beyond the cam morphology, to determine how additional anatomical characteristics could contribute to symptoms and influence functional mobility, using: 1) in vivo analyses, where we asked how specific anatomical parameters (in addition to the cam morphology) can predict individuals at risk of symptoms; 2) In silico simulations, where we examined how pathoanatomical features contributed to adverse loading conditions, resulting in higher risks of hip joint degeneration; 3) In vitro cadaveric experiments, where we examined the contributions of the cam morphology and encapsulating ligaments to joint mechanics and microinstability. This research further highlights that more emphasis should be placed on proper patient selection. There are implications of how structural anatomy can affect musculature, joint loading and stability, which should all be closely examined to improve the effectiveness of hip preservation surgery as well as the understanding of non-surgical management


Orthopaedic Proceedings
Vol. 99-B, Issue SUPP_2 | Pages 59 - 59
1 Jan 2017
Winfield S Kumar G
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GIRFT was published in the United Kingdom with the aim of streamlining primary care pathways, secondary care, creating a network of hospitals and treatment centres and to better regulate introduction of new implants. It also proposed the use of Orthopaedic Devices Evaluation Panel (ODEP) 10A* rated cemented implants in hip arthroplasty. Aim: The purpose of this study was to assess the effects of adopting GIRFT on surgical time, length of stay, changes to the implants used and number of cases per surgical list. Prior to adopting GIRFT, elective primary total hip replacement (THR) was predominantly uncemented THR. Age, sex, Body Mass Index (BMI), American Society of Anesthetiss (ASA), closure technique and surgical time of 50 consecutive primary uncemented THR were analysed to identify the appropriate statistical methods. Mean and standard deviation for surgical time were identified. Threshold increase in surgical time was set at 20 minutes. Based on expected difference of 20 minutes and standardised difference, minimum sample size was calculated to be 19. Prospective data on 60 consecutive uncemented THR and 30 consecutive cemented primary THR were included in this study. Inclusion criteria – primary THR for arthritis by single surgeon. Exclusion criteria – previous hip surgery, complex primary, abnormal anatomy. No differences in age, sex, BMI, ASA and length of stay between the two groups. Surgical time was significantly increased by 28 minutes (p<0.001). Implants used changed from 7A*/5A* uncemented THR to 10A* (18/30) and 7A*(12/30) cemented THR. There was a reduction in number of THR done per surgical list due to the increase in surgical time (3 instead of 4). GIRFT compliance improved from 0% cemented to 100% cemented. 0% 10A* rated implants to 66% 10A* rated implants. Undertaking cemented THR instead of uncemented THR is associated with significantly increased surgical time. Hence, number of THR surgeries performed in a day's list is accordingly reduced. There is potential for financial loss when the savings in the implants used is compared with the reduction in the number of surgeries performed


Orthopaedic Proceedings
Vol. 100-B, Issue SUPP_3 | Pages 11 - 11
1 Apr 2018
Pfeufer D Stadler C Neuerburg C Schray D Mehaffey S Böcker W Kammerlander C
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Objectives. Aged trauma patients are at high risk for various comorbidities and loss of function following hip fracture. Consequently a multidisciplinary approach for the treatment of these patients has become more famous in order to maintain the patients” activity level and health status prior to trauma. This study evaluates the effect of a multidisciplinary inpatient rehabilitation on the short- and long-term functional status of geriatric patients following hip fracture surgery. Methods. A collective of 158 hip fracture patients (> 80 years) who underwent surgery were included in this study. An initial Barthel Index lower than 30 points was a criteria to exclude patients from this study. Two subgroups, depending on the availability of treatment spots at the rehabilitation center were made. No other item was used to discriminated between the groups. Group A (n=95) stayed an average of 21 days at an inpatient rehabilitation center specialized in geriatric patients. Group B (n=63) underwent the standard postoperative treatment. As main outcome parameter we used the Barthel Index, which was evaluated for every patient on the day of discharge and checkups after three, six and twelve months. Results. After three months, the average Barthel Index was 82,27 points for group A and 74,68 points for group B (p=0,015). In the six-months-checkup group A”s average Barthel Index was 84,05 points and group B”s was 74,76 points (p=0,004). After twelve months, patients from group A had an average Barthel Index of 81,05 while patients from group B had an average Barthel Index of 71,51 (p=0,010). Conclusion. This study reveals a significant better outcome in both, the short-term and the long-term functional status for geriatric hip-fracture patients, who underwent an inpatient treatment in a rehabilitation center following the initial surgical therapy. This is shown at the timepoints three, six and twelve month after discharge. To maintain quality of life and mobility as well as the patient”s independence in daily life, a treatment in a rehabilitation center specialized in geriatric patients is highly recommendable