Distracted driving is now the number one cause of death among teenagers in the United States of America according to the National Highway Traffic Safety Administration. However, the risks and consequences of driving while distracted spans all ages, gender, and ethnicity. The Distractions on the Road: Injury eValuation in Surgery And FracturE Clinics (DRIVSAFE) Study aimed to examine the prevalence of distracted driving among patients attending hospital-based orthopaedic surgery fracture clinics. We further aimed to explore factors associated with distracted driving.

In a large, multi-center prospective observational study, we recruited 1378 adult patients with injuries treated across four clinics (Hamilton, Ontario, Toronto, Ontario, Calgary, Alberta, Halifax, Nova Scotia) across Canada. Eligible patients included those who held a valid driver's license and were able to communicate and understand written english. Patients were administered questions about distracted driving. Data were analyzed with descriptive statistics.

Patients average age was 45.8 years old (range 16 – 87), 54.3% male, and 44.6% female (1.1% not disclosed). Of 1361 patients, 1358 self-reported distracted driving (99.8%). Common sources of distractions included talking to passengers (98.7%), outer-vehicle distractions (95.5%), eating/drinking (90.4%), music listening/adjusting the radio (97.6%/93.8%), singing (83.2%), accepting phone calls (65.6%) and daydreaming (61.2%). Seventy-nine patients (6.3%), reported having been stopped by police for using a handheld device in the past. Among 113 drivers who disclosed the cause of their injury as a motor vehicle crash (MVC), 20 of them (17%) acknowledged being distracted at the time of the crash. Of the participants surveyed, 729 reported that during their lifetime they had been the driver in a MVC, with 226 (31.1%) acknowledging they were distracted at the time of the crash.

Approximately, 1 in 6 participants in this study had a MVC where they reported to be distracted. Despite the overwhelming knowledge that distracted driving is dangerous and the recognition by participants that it can be dangerous, a staggering amount of drivers engage in distracted driving on a fairly routine basis. This study demonstrates an ongoing need for research and driver education to reduce distracted driving and its devastating consequences.

To assess the current literature on suture anchor placement for the purpose of identifying factors that lead to suture anchor perforation and techniques that reduce the likelihood of complications.

Three databases (PubMed, Ovid MEDLINE, EMBASE) were searched, and two reviewers independently screened the resulting literature. Methodological quality of all included papers was assessed using Methodological Index for Non-Randomized Studies criteria and the Cochrane Risk of Bias Assessment tool. Results are presented in a narrative summary fashion using descriptive statistics.

Fourteen studies were included in this review. Four case series (491 patients, 56.6% female, mean age 33.9 years), nine controlled cadaveric/laboratory studies (111 cadaveric hips and 12 sawbones, 42.2% female, mean age 60.0 years), and one randomized controlled trial (37 hips, 55.6% female, mean age 34.2 years) were included. Anterior cortical perforation by suture anchors led to pain and impingement of pelvic neurovascular structures. The anterior acetabular positions (three to four o'clock) had the thinnest bone, smallest rim angles, and highest incidence of articular perforation. Drilling angles from 10° to 20° measured off the coronal plane were acceptable. The mid-anterior (MA) and distal anterolateral (DALA) portals were used successfully, with some studies reporting difficulty placing anchors at anterior locations via the DALA portal. Small-diameter (< 1 .8-mm) suture anchors had a lower in vivo incidence of articular perforation with similar stability and pull-out strength in biomechanical studies.

Suture anchors at anterior acetabular rim positions (3–4 o'clock) should be inserted with caution. Large-diameter (>2.3-mm) suture anchors increase the likelihood of articular perforation without increasing labral stability. Inserting small-diameter (< 1 .8-mm) all-suture suture anchors (ASAs) from 10° to 20° using curved suture anchor drill guides, may increase safe insertion angles from all cutaneous portals. Direct arthroscopic visualization, use of fluoroscopy, distal-proximal insertion, and the use of nitinol wire can help prevent articular violation.

Aims

The aims of this systematic review were to describe the quantity and methodological quality of meta-analyses in orthopaedic surgery published during the last 17 years.

Objectives

The purpose of this study was to evaluate the existing literature from 2005 to 2016 reporting on the efficacy of surgical management of patients with femoroacetabular impingement (FAI) secondary to slipped capital femoral epiphysis (SCFE).

To determine if there are osteochondritis dissecans (OCD) lesions of the knee that are so unstable on MRI that they are incapable of healing without operative intervention. A secondary objective was to determine the ability of orthopaedic residents to accurately grade OCD lesions according to the Kijowski criteria of stable and unstable.

A retrospective review was performed of patients who had femoral condyle OCD lesions from 2009-present. Only patients with open growth plates and serial MRIs were included. Each MRI was classified according to the Kijowski classification by a junior orthopaedic surgery resident as well as an MSK trained radiologist. A weighted kappa value was used to assess the inter-rater agreement.

The final analysis included 16 patients (17 knees) with 49 MRI's. The weighted kappa agreement between reviewers for overall lesion stability was moderate (0.570 [95% CI 0.237–0.757]). The initial MRI lesion was graded as stable in 59% (10/17) of the knees. Two of these 10 knees became unstable during the study period, however, both stabilised again on subsequent MRIs, one with surgery and the other without surgery. The initial MRI was graded as unstable in 41% (7/17) of the knees. Two of the seven knees (29%) later demonstrated MRI evidence of lesion stability without surgical intervention.

The most important finding in this study was the ability of unstable OCD lesions on MRI to heal without operative intervention. The ability of an orthopaedic surgery resident to grade these lesions on MRI was moderate.

Health care facilities are major contributors of waste to landfills, with operating rooms estimated to assume 20–70% of this waste. With hip arthroscopy for femoroacetabular impingement (FAI) on the rise, it is important to understand its environmental impact and identify areas for greening practices. Given its minimally-invasive nature, we hypothesise overall arthroscopic waste per FAI patient case to be approximately 5 kg, with minimal biohazard waste. The purpose of this study was to determine the amount of waste produced in FAI procedures and understand the environmental impact of the procedure to aid us in developing greening practices.

A single surgeon waste audit (with descriptive statistics) of five FAI hip arthroscopy procedures – categorised by: 1) normal/landfill waste; 2) recyclable cardboards and plastics; 3) biohazard waste; 4) sharp items; 5) linens; and 6) sterile wrapping – was performed in April 2015.

The surgical waste (except laundered linens) from the five FAI surgeries totalled 47.4 kg, of which 21.7 kg (45.7%) was biohazard waste, 11.7 kg (24.6%) was sterile wrap, 6.4 kg (13.5%) was normal/landfill waste, 6.4 kg (13.5%) was recyclable plastics, and 1.2 kg (2.6%) was sharp items. There was an average of 9.4 kg (excluding laundered linens) of waste produced per procedure.

Considerable waste, specifically biohazard waste, is produced in FAI procedures with an average of 9.4 kg of waste produced per procedure, including 4.3 kg of biohazard waste. In Canada (population 35.7 million), approximately 18 800 kg of waste (8600 kg of biohazard waste) is produced from an estimated 2000 FAI procedures performed every year. Additional recycling programs, reducing surgical overage, and continued adherence to proper waste segregation will be helpful in reducing waste production and its environmental burden. An emphasis on “green outcomes” is also required to demonstrate environmental responsibility and effectively manage and allocate finite resources.

Objective

Hip arthroscopy in the setting of hip dysplasia is controversial in the orthopaedic community, as the outcome literature has been variable and inconclusive. We hypothesise that outcomes of hip arthroscopy may be diminished in the setting of hip dysplasia, but outcomes may be acceptable in milder or borderline cases of hip dysplasia.

Purpose

The recent emergence of autologous blood concentrates, such as platelet rich plasma (PRP), as a treatment option for patients with orthopaedic injuries has led to an extensive debate about their clinical benefit. Our objective was to determine the effectiveness of autologous blood concentrates compared with control therapy in improving pain in patients with orthopaedic bone and soft tissue injuries.

Purpose

Cross-linking of polyethylene greatly reduces its wear rate in hip simulator studies. We conducted a systematic review and meta-analysis of randomized controlled trials comparing cross-linked to conventional polyethylene liners for total hip arthroplasty to determine if there is a clinical reduction of: 1) wear rates, 2) radiographic osteolysis, and 3) need for total hip revision.

Purpose: The purpose of this study was to evaluate how outcome assessment committees of various sizes, and the biases and personalities of its members, potentially impact a trial’s results.

Method: We conducted a retrospective analysis of the available individual and consensus data from an adjudication committee in a multinational trial (the SPRINT trial) of fracture fixation alternatives. The trial committee members included six members (5 surgeons, 1 methodologist) who independently determined the outcome of reoperation, and any discordant cases were discussed in the committee until a consensus was achieved. We described the pattern of agreement among adjudicators, modeled the adjudication process, and predicted the results if a smaller committee had been used. We also tested for adjudicator biases based upon their preferences for reamed or unreamed intramedullary nails, the presence of a potentially dominant adjudicator, and evaluated the resource implications of reducing the size of an adjudication committee.

Results: Overall, committee member agreement was moderate (Kappa Free=0.6). We found that reducing the number of adjudicators from six to three would have changed the consensus outcome in less than 15% of cases. Regardless of committee size, per-patient analyses also demonstrated very little change in the final study results across all fracture types or in the open fracture subgroup. Results from the original SPRINT adjudication indicated a significant decrease in the rate of reoperations associated with reamed intramedullary nailing among patients with closed fractures (relative risk 0.65; 95% confidence interval 0.46 to 0.93; p=0.02). Under the model, in committee sizes of three or less persons, these estimates of treatment effect were no longer significant. There was a significant difference between adjudicators with respect to the number of times their independent decision was in the minority but nevertheless became the final consensus decision (p=0.046), suggesting a dominant adjudicator was present in the committee. There were large predicted savings in cost and time with a reduced committee size.

Conclusion: In this study, smaller committees (i.e., four or five rather than six adjudicators) would likely have produced similar results, substantially reducing costs of research.

Purpose: Unbiased outcome assessment in orthopedic clinical trials has the potential to improve trial validity. The approaches used to limit bias in outcome assessment in orthopaedic trials remain unclear. The objective of this systematic review was to assess the reporting and process of outcomes assessment practices in the current orthopaedic trauma literature.

Method: We searched eight high-impact-factor medical and orthopaedic journals manually and using the MED-LINE electronic database for reports of randomized controlled trials published from 2005 to 2008 pertaining to the surgical treatment of trauma-related injuries. Two reviewers independently determined study eligibility and extracted relevant data from included trials.

Results: Of the 7910 citations identified during our search, 47 randomized controlled trials, which included a total of 4706 patients, met our inclusion criteria. Of 47 studies, 39 (83%) provided a statement to describe some process of outcome assessment and 29 (74%) reported using an unblinded individual as the outcome adjudicator. Four studies (10%) reported using a second assessor to verify outcome measurements, and three studies (8%) reported the use of an adjudication committee to reach endpoint decisions via consensus. No included study provided a rationale for the use of their chosen approach to adjudication. The most commonly adjudicated outcomes included fracture healing (15 studies), reoperation rate (6 studies), and general clinical assessment of post-operative complications and limb function (30 studies), mainly by orthopaedic surgeons. Blinding of outcome assessors was not performed or unclear in 38 studies (81%).

Conclusion: Despite the importance of the outcome assessment process in orthopedic trauma trials, key aspects of outcome assessment are insufficiently reported. This limits the ability of readers to assess the validity of published trials.

Purpose: Estimating recruitment for clinical trials is vital to ensuring the feasibility of larger multi-centre trials. We compared estimates of potential recruitment from a prospective eight-week screening study and a retrospective chart review across sites participating in three fracture management trials.

Method: During the planning phase of two multi-centre, randomized controlled trials regarding the operative treatment of hip (two studies) and tibial shaft (one study) fractures, 74 clinical sites provided estimates of the annual recruitment rate both retrospectively (based on chart reviews) and prospectively. The prospective estimate was generated by screening all incoming patients for eligibility in the concerning trial, without actually enrolling any patient, for eight weeks. These prospective and retrospective estimates were correlated with each other (for 74 sites) and with actual one-year recruitment rates in the definitive trial (for nine sites).

Results: On average, a centre’s prospective estimate was only slightly lower than its retrospective estimate (3.1 patient-difference, p=0.64). Both predictions were substantial overestimations of recruitment in the definitive trial; only 31% (95% confidence interval: 28%–35%) of retrospectively estimated patients and 34% (95% confidence interval: 30%–37%) of prospectively estimated patients were recruited in the definitive trials (p< 0.001 and p=0.001 for both overestimations, respectively). The overall costs of conducting retrospective chart reviews and prospective screening studies in 65 sites were $68,107 ($CAN) and $153,725 ($CAN), respectively.

Conclusion: Compared to relatively simple and inexpensive chart reviews, prospectively screening for eligible patients at clinical sites did not result in more accurate predictions of accrual in large randomized controlled trials.

Purpose: Hip fractures are associated with a high rate of mortality and profound temporary and sometimes permanent impairment of independence and quality of life. While guidelines exist for the surgical treatment of hip fracture patients, the effect of surgical delay on mortality and other patient-important outcomes remains unclear. The objective of this systematic review and meta-analysis was to determine the effect of early surgery compared with delayed surgery on the risk of mortality, common postoperative complications, and length of hospital stay among elderly hip fracture patients.

Method: We searched MEDLINE and EMBASE for relevant prospective studies evaluating surgical delay in patients undergoing surgery for hip fractures published in all languages between 1966 and 2008. We identified additional studies through contacting experts, as well as hand searches of the bibliographies of relevant articles and the archives of orthopaedic annual meetings. Two reviewers independently assessed methodological quality and extracted relevant data. When necessary, we contacted authors for clarification of study design or to provide additional data. Data were pooled by use of a DerSimonian and Laird random-effects model based on the inverse variance method.

Results: Of 1917 citations identified, 16 observational studies, which included a total of 13,565 patients with complete mortality data, met our inclusion criteria. Irrespective of the cut-off for delay (24, 48, or 72 hours), earlier surgery (< 24, < 48, or < 72 hours) was significantly associated with a reduction in the risk of unadjusted one-year mortality (relative risk 0.55; 95% confidence interval, 0.40 to 0.75, p=0.0002) and adjusted mortality rates (relative risk 0.81; 95% confidence interval, 0.68 to 0.96, p=0.01). Earlier surgery also reduced in-hospital pneumonia (relative risk 0.59; 95% confidence interval, 0.37 to 0.93, p=0.02), pressure sores (relative risk 0.48; 95% confidence interval, 0.34 to 0.69, p< 0.0001) and hospital stay (weighted mean difference 9.95 days; 95% confidence interval, 1.52 to 18.39, p=0.02).

Conclusion: Earlier surgery reduced the risk of mortality, postoperative pneumonia, pressure sores, and length of hospital stay among elderly hip fracture patients suggesting that it may be warranted to reduce administrative delays whenever possible. However, potential residual confounding of observational studies may limit any definitive conclusions.

We conducted a systematic review and meta-analysis of randomised controlled trials comparing cross-linked with conventional polyethylene liners for total hip replacement in order to determine whether these liners reduce rates of wear, radiological evidence of osteolysis and the need for revision. The MEDLINE, EMBASE and COCHRANE databases were searched from their inception to May 2010 for all trials involving the use of cross-linked polyethylene in total hip replacement. Eligibility for inclusion in the review included the random allocation of treatments, the use of cross-linked and conventional polyethylene, and radiological wear as an outcome measure. The pooled mean differences were calculated for bedding-in, linear wear rate, three-dimensional linear wear rate, volumetric wear rate and total linear wear. Pooled risk ratios were calculated for radiological osteolysis and revision hip replacement. A search of the literature identified 194 potential studies, of which 12 met the inclusion criteria. All reported a significant reduction in radiological wear for cross-linked polyethylene.

The pooled mean differences for linear rate of wear, three-dimensional linear rate of wear, volumetric wear rate and total linear wear were all significantly reduced for cross-linked polyethylene. The risk ratio for radiological osteolysis was 0.40 (95% confidence interval 0.27 to 0.58; I² = 0%), favouring cross-linked polyethylene. The follow-up was not long enough to show a difference in the need for revision surgery.

Giant cell tumor (GCT) of bone is an osteolytic tumor that is locally aggressive and potentially metastatic. The pathogenesis of GCT is poorly understood. The purpose of this study was to harvest and culture primary cell lines from clinical specimens of GCT of bone and identify specific bone degradation proteases (matrix metalloproteinases: MMP-2, MMP-9) produced by the neoplastic stromal cells in vitro.

With approval by the McMaster University Biohazards and Ethics Review Boards, we acquired consent from five patients with GCT of bone, and harvested specimens intraoperatively. The specimens were chopped in DMEM containing 10% Fetal Bovine Serum, 2 mM L-glutamine, 100 U/ml penicillin and 100 mg/ml streptomycin. The cell suspensions were incubated at thirty-seven degrees (5% CO2 and 95% air) and cultivated. The cells were grown to confluence and taken through several passages until only proliferative cells were present. Immunocytochemistry with TRAP (Tartrate Resistant Acid Phosphatase) was used to confirm the stem cell origin of the propagative cells. Protein electrophoresis with embedded gelatin was used for detecting protease activity (MMP-2, MMP-9) on cell lysates and medium. P-aminophenyl mercuric acetate (APMA) was used to activate and ethylenediaminetetraacetic acid (EDTA) was used to block MMP-2 and MMP-9 activity. Our controls included serum free media, Human Osteosarcoma and Fibroblast cell lines.

Immunocytochemistry with TRAP confirmed that our propagative cells were not hematopoietic in origin but rather mesenchymal. Protein electrophoresis on cell lysates and medium identified the protease activity of MMP-2 and MMP-9 with lytic bands at appropriate molecular weights. APMA activated MMP-2 more than MMP-9, as indicated by increased relative density of bands. EDTA blocked the activity of both MMPs.

Our study confirmed the ability to cultivate the neoplastic stromal cells of GCT of bone from clinical specimens. Protein electrophoresis showed that activated MMP-2 and MMP-9 are secreted from the neoplastic stromal cells in vitro, suggesting a role for the tumor cells in bone destruction. These results are intriguing, as novel therapies in specific MMP inhibitors are currently underway for numerous disease processes.