A number of techniques have been developed to improve the immediate mechanical anchorage of implants for enhancing implant longevity. This issue becomes even more relevant in patients with osteoporosis who have fragile bone. We have previously shown that a dynamic hip screw (DHS) can be augmented with a calcium sulphate/hydroxyapatite (CaS/HA) based injectable biomaterial to increase the immediate mechanical anchorage of the
A Morel-Lavallee lesion (MLL) is a benign cystic lesion that occurs due to injury to the soft-tissue envelope's perforating vascular and lymphatic systems, resulting in a distinctive hemolymphatic fluid accumulation between the tissue layers. The MLL has the potential to make a significant impact on the treatment of orthopaedic injuries. A 79-year-old male patient community ambulatory with assisting aid (cane) known case of Diabetes mellitus, hypertension, bronchial asthma and ischemic heart disease. He was brought to the Emergency, complaining of right hip discomfort and burning sensation for the last 5 days with no history of recent trauma at all. Patient had history of right trochanteric femur fracture 3 years ago, treated with
Introduction and Objective. When using radiation intraoperatively, a surgeon should aim to maintain the dose as low as reasonably achievable to obtain the diagnostic or therapeutic goal. The UK Health Protection Agency reported mean radiation dose-area-product (DAP) of 4 Gy cm2 for hip procedures. We aimed to investigate factors associated with increased radiation exposure in fixation of proximal femur fractures. Materials and Methods. We assessed 369 neck of femur fractures between April 2019 and April 2020 in one district general hospital. Fractures were classified as extracapsular or intracapsular and into subtypes as per AO classification. Data was collected on type of fractures, implants used, level of surgeon, duration of surgery and DAP. Types of fractures were subclassified as complex (multifragmentary, subtrochanteric and reverse oblique) or simple. Results. Patients with fractures fixed with
Background. Hip fractures cause significant morbidity and mortality, affecting 70,000 people in the UK each year. The dynamic hip screw (DHS) is used for the osteosynthesis of extracapsular neck of femur fractures, a procedure that requires complex psychomotor skills to achieve optimal lag screw positioning. The tip-apex distance (TAD) is a measure of the position of the lag screw from the apex of the femoral head, and is the most comprehensive predictor of cut-out (failure of the
Introduction and Objective. Hip fractures represent one of the most challenging injuries in orthopaedic practice due to the associated morbidity, mortality and the financial burden they impose on the health care systems. By many still considered as the gold standard in the management of intertrochanteric fractures, the Dynamic Hip Screw utilizes controlled collapse during weight bearing to stabilize the fracture. Despite being a highly successful device, mechanical failure rate is not uncommon. The most accepted intraoperative indicator for lag screw failure is the tip apex distance (TAD), yet lateral femoral wall thickness (LWT) is another evolving parameter for detecting the potential for lateral wall fracture with subsequent medialization and implant failure. The aim of this study is to determine the mean and cut off levels for LWT that warrant lateral wall fracture and the implications of that on implant failure, revision rates and implant choice. Materials and Methods. This prospective cohort study included 42 patients with a mean age of 70.43y with intertrochanteric hip fractures treated with
Background. Hip fractures affect 1.6 million people globally per annum, associated with significant morbidity and mortality. A large proportion are extracapsular neck of femur fractures, treated with the dynamic hip screw (DHS). Mechanical failure due to cut-out is seen in up to 7% of
Background. The advantages of treatment by open reduction and internal fixation for intertrochanteric fractures of the proximal femur have been well known for several decades. Failure of fixation can result in revision surgery, prolonged inpatient stay and has major socio-economic consequences. There are many new devices on the market to help deal with this problem. Expandable hip screw (EHS) is one such device, which is an expanding bolt that may offer superior fixation in osteoporotic bone compared to the standard dynamic hip screw (DHS) type device. Methods. Static axial compression tests with elastic deformation of the specimens were performed with a crosshead speed of 10 mm/min to determine stiffness of testing was performed with 3 cycles from 0 N to 250 N, 3 cycles from 0 N to 500 N, 3 cycles from 0 N to 750 N and 3 cycles from 0 N to 1000 N with a holding time of 10 s per test cycle. Displacement control was apply the pullout strength with a velocity of 1mm/sec. The ability to resist rotation about the axis of a lag screw is of critical importance particularly when the fracture line is perpendicular, or nearly perpendicular, to the femoral neck. Implants were subjected to a rotation of 1 degree/sec and peak torque values were recorded. Results. The mean axial cyclic loading
It is widely accepted that a tip apex distance of greater than 25mm is associated with dynamic hip screw (DHS) failure and cut-out. The aim was to devise an accurate and easy method for calculation of
Background. Training within surgery is changing from the traditional Halstedian apprenticeship model. There is need for objective assessment of trainees, especially their technical skills, to ensure they are safe to practice and to highlight areas for development. In addition, due to working time restrictions in both the UK and the US, theatre time is being limited for trainees, reducing their opportunities to learn such technical skills. Simulation is one adjunct to training that can be utilised to both assess trainees objectively, and provide a platform for trainees to develop their skills in a safe and controlled environment. The insertion of a dynamic hip screw (DHS) relies on complex psychomotor skills to obtain an optimal implant position. The tip-apex distance (TAD) is a measurement of this positioning, used to predict failure of the implant. These skills can be obtained away from theatre using workshop bone simulation, however this method does not utilise fluoroscopy due to the associated radiation risks. FluoroSim is a novel digital fluoroscopy simulator that can recreate digital radiographs with workshop bone simulation for the insertion of a
Background. Fractures of the femoral neck occurring outside the capsule of the hip joint are assumed to have an intact blood supply and hence their conventional management is by fixation rather than arthroplasty. The dynamic hip screw and its variants have been used over many years to fix such fractures but have inherent vulnerabilities; they require an intact lateral femoral cortex, confer a relatively long moment arm to the redistribution of body weight and may cause a stress riser due to the plate with which they are fixed to the femur. Intramedullary devices for fixation of proximal femoral fractures have a shorter moment arm, can be distally locked with reduced perforation of the femoral cortex and are believed to be inherently more stable. For these reasons, a number of surgeons believe them to be superior to the
Three Cannulated Screws (3CS), Dynamic Hip Screw (DHS) with antirotation screw (DHS–Screw) or with a Blade (DHS–Blade) are the gold standards for fixation of unstable femoral neck fractures. Compared to 3CS, both
Introduction and Aims. Peritrochanteric femur fractures are common and impose major costs on the healthcare system. A fixed angle sliding hip screw is the principle method of treatment, but the rate of mechanical failure associated with these devices can be high; the usual mechanism being the collapse of the neck shaft angle leading to extrusion of the screw from the femoral head, commonly known as “cutout”. Many variables contribute to the risk of cutout, however there is substantial evidence that the “Tip Apex Distance” (a single number that summarises the position and depth of the lag screw on anteroposterior and lateral radiographs after controlling for magnification) is the single best predictor of risk of failure. There is a strong statistical relationship between an increasing tip apex distance (TAD) and the rate of cutout. Specifically, a TAD of 25 mm or less significantly reduces risk of failure. The aim of our study is to assess levels of compliance with a maximum TAD of 25 mm in peritrochanteric femur fractures treated with Dynamic Hip Screws and IM Nails. Methods. We retrospectively measured the TAD of 45 patients who had undergone
Digital radiographs are routinely used for preoperative planning, both in trauma and elective patients; particularly in preoperative templating for total hip replacement. Traditional wisdom holds that radiographs are oversized, though the degree to which this occurs is unclear. Although digital templating systems offer the use of calibration markers, this option is not always availed. We aimed to ascertain the typical magnification in departmental xrays of the hip, both to determine the typical degree of magnification as well as ascertain its consistency. All patients undergoing dynamic hip screw fixation (DHS) in our unit over the past 12 months were identified. Using the PACS system, subsequent xrays of the patient with the implant in situ were identified; both anteroposterior abdominal and pelvic films were used. The width of a standard
Background. Radiation exposure remains a significant occupational hazard for Orthopaedic surgeons. There are no references values for trauma procedures performed with Image Intensifier (II). We aimed to determine and compare reference values for patient radiation exposure for common trauma operations, and to analyse the effect of surgeon grade on II usage. Methods. Data collected prospectively from 849 cases between 01/05/2013 and 01/10/2014 were analysed. Statistical analysis was performed to calculate reference values for dose area product (DAP), screening time (ST), and number of II images taken for common trauma procedures where n>9 (n=808). Results. Dynamic hip screw (DHS) fixation required significantly less radiation than proximal femoral nail (PFN) for intertrochanteric hip fractures for median DAP (668mG/cm2 vs 1040mG/cm2, p<0.001), ST (00:36 vs 00:48, p<0.001), and number of II images (65 vs 110, p<0.001). Radiation exposure was statistically significantly less when Consultant Orthopaedic surgeons were first surgeon compared to Staff grade doctors and Orthopaedic trainees for DAP (90.55mGy/cm2 vs 175.5mGy/cm2 vs 366.5mGy/cm2), screening time (00:26 vs 00:32 vs 00:36), and number of II images (49 vs 59 vs 66). Conclusions. We reported reference values for common trauma operations that are essential to enable monitoring of patient radiation exposure. PFN required greater radiation exposure than
Background Hip fractures are one of the leading causes of hospital admissions. Surgical treatment is often associated with significant blood loss, requiring post-operative erythrocyte transfusion. Aim To assess post-operative erythrocyte transfusion rates for hip fractures and evaluate the effect of tranexamic acid (TXA). Method. All patients undergoing surgical repair of a hip fracture at RLBUHT between 1st April 2013 – 30th April 2014 were selected. Data regarding transfusion status and peri-operative TXA use was collected from electronic databases and case notes. Results. 450 patients were admitted with a hip fracture, of whom 441 underwent surgery. Modalities of hip fixation included total hip replacement (THR, n=39), hemiarthroplasty (n=145), dynamic hip screw (DHS, n=116), cannulated hip screw (CHS, n=17) and long (n=71) and short (n=53) intramedullary hip screw (IMHS). 44.2% received a post-operative erythrocyte transfusion, with an average of 2.5 units per patient (range 1–9 units). With all study subjects included, the average transfusion rates for THR, hemiarthroplasty,
The Dumfries and Galloway Royal Infirmary (DGRI) catchment area encompasses 5 of the “7 Stanes” mountain bike trails which had approximately 165000 visitors in 2010. Using our hospital coding system we identified potential mountain bike injuries in 2010. Patient postcode, injuries, operating theatre time and number of clinic appointments was recorded. We confirmed mountain bike related hospital admissions in 29 patients. 13 patients had local (DG) postcodes and 16 had non-DG post codes. The DG postcode patients required 41 bed days, 8 operations, 400 minutes theatre time, and 35 DGRI clinic appointments. The non-DG postcodes required 50 bed days, 11 operations, 730 minutes theatre time, 3 DGRI clinic appointments and 8 outpatient referrals to other hospitals. Totals for all postcodes were 91 bed days, 19 operations, 1130 minutes theatre time and 38 DGRI clinic appointments. The surgeries comprised: 2 ankle ORIF; 1 subsequent removal of syndesmosis screw; 5 wrist/forearm manipulations (+/−kwires); 2 distal radius ORIF; 1
Introduction. The use of the dynamic hip screw is common practice for the fixation of intertrochanteric fractures of the femur. The success of this procedure requires accurate guide wire placement. This can prove difficult at times and can result in repeated attempts leading to longer operating time, multiple tracks and more importantly greater radiation exposure to both patient and operating staff. We hypothesised that rather than using the standard anterior-posterior projected image (Figure 1) of a proximal femur, rotating the intensifier image (Figure 2) so that the guide wire appears to pass vertically makes it easier to visualise the projected direction of the guide wire. Methods. Fifty Specialist Registrars, thirty participating in the London hip meeting 2009, ten from Oxford and ten from Northern deanery orthopaedic rotations were involved in the study. They were presented with standard AP and rotated images of the femoral neck on paper using 135 degree template to replicate the