Comparison of Early Postoperative Step and Stair Counts With the Direct Anterior Approach Versus the Posterior Approach for Total Hip Arthroplasty.

BACKGROUND: The purpose of this study was to evaluate the impact of direct anterior approach (DAA) or posterior approach (PA) on step and stair counts after total hip arthroplasty using a remotely monitored mobile application with a smartwatch while controlling for baseline characteristics. METHODS: This is a secondary data analysis from a prospective cohort study of patients utilizing a smartphone-based care management platform. The primary outcomes were step and stair counts and changes from baseline through one year. Step and stair counts were available for 1,501 and 847 patients, respectively. Longitudinal regression models were created to control for baseline characteristics. RESULTS: Patients in the DAA group had significantly lower body mass index (P = .049) and comorbidities (P = .028), but there were no significant differences in age (P = .225) or sex (P = .315). The DAA patients had a higher average and improvement from baseline in step count at 2 and 3 weeks postoperatively after controlling for patient characteristics (P = .028 and P = .044, respectively). The average stair counts were higher for DAA patients at one month postoperatively (P = .035), but this difference was not significant after controlling for patient demographics. Average stair ascending speeds and changes from baseline were not different between DAA and PA patients. Descending stair speed was higher at 2 weeks postoperatively for DAA patients, but was no longer higher after controlling for baseline demographics. CONCLUSIONS: After controlling for baseline characteristics, DAA patients demonstrate earlier improvement in step count than PA patients after total hip arthroplasty. However, patient selection and surgeon training may continue to influence outcomes through a surgical approach.

Robotic-Assisted Total Knee Arthroplasty Has Similar Rates of Prosthetic Noise Generation as Conventional Total Knee Arthroplasty.

Background: Noise has been reported to occur with relatively high frequency after conventional total knee arthroplasty (C-TKA), and this may impact the incidence of patient satisfaction and function. The purpose of this study was to compare the rate of patient-reported prosthetic noise generation after robotically-assisted TKA (RA-TKA) and C-TKA. Methods: A retrospective study was conducted of unilateral primary RA-TKAs and C-TKAs performed between 2018 and 2021. Patients completed a survey consisting of 4 Likert scale questions related to prosthetic noise generation and Knee Injury and Osteoarthritis Score Joint Replacement and Forgotten Joint Score were assessed prospectively preoperatively and at a minimum of 1-year of clinical follow-up. Statistical analysis was done utilizing T-tests and chi-square tests, with statistical significance defined as a P-value < .05. Results: One hundred sixty-two RA-TKAs and 320 C-TKAs with similar baseline characteristics and functions were included. There were no significant differences in hearing or feeling grinding, popping, clicking, or clunking (40.7% vs 38.1%; P = .647) between groups. Most RA-TKAs and C-TKAs were not dissatisfied regarding noise generation (70.4% vs 73.1%; P = .596). In both cohorts, patients who reported noise generation had lower average Forgotten Joint Scores (45.5 vs 66.1; P < .001) and lower postoperative Knee Injury and Osteoarthritis Score Joint Replacement scores (72.0 vs 81.4; P < .001) than those who did not experience noise generation. Conclusions: While RA-TKA may facilitate soft tissue balancing, there were no differences in prosthetic noise generation between RA-TKA and C-TKA. However, those who experience implant-generated noise have lower functional outcome scores.

Femoral Condyle Insufficiency Fracture After Total Knee Arthroplasty Using a Stemless Femoral Component With a Midlevel Constraint Articular Surface.

Midlevel constraint prostheses have provided increased varus/valgus and rotational stability for patients with severe deformity or ligamentous instability undergoing total knee arthroplasty (TKA). Here we present a series of 5 patients, 2 in detail, who underwent a primary TKA with a midlevel constraint articular surface and a primary femoral component without stem extension who all suffered isolated medial femoral condyle insufficiency fractures. All 5 TKAs were performed in females with both preoperative valgus deformity and flexion contractures. Patients had an average age of 74.4 years, height 62.4 in, and weight 156.2 lbs. Revision TKA was performed in 4 of 5 cases. As a result of these cases, we now routinely consider implanting a stemmed femoral component in this population with osteoporotic medial femoral condyles.

Success of Various Marketing Strategies for a New-to-the-Area Orthopedic Practice.

Background Competition for patients among orthopaedic private practices, multi-specialty groups, and hospital systems continues to persist. An effective marketing campaign is essential for a practice to succeed in this competitive environment. The purpose of this study was to investigate the cost-effectiveness and efficacy of each marketing campaign and the influence of patient demographics on efficacy. Methods The first 300 consecutive, new patients were prospectively surveyed on how they initially discovered and then selected the orthopaedic practice. Demographics and marketing costs were tabulated and categorized to analyze the effectiveness of each marketing strategy. Results A substantial portion of the marketing budget was allocated for traditional (67.0%) and online advertising (25.0%). However, only 56/300 (18.7%) patients surveyed were brought to the practice by these methods combined. In contrast, expenditure on a marketing liaison (8.0%) delivered 128 patients (42.7%) through referrals: 80 (26.7%) from physicians, 28 (9.3%) from urgent cares, 17 (5.7%) from physical therapists, and 3 (1.0%) from attorneys. Conclusion Marketing strategies were not proportionally beneficial during the first six months of the orthopaedic practice start-up period. During this early ramping up period, the most cost-effective marketing strategy was utilization of a liaison for direct in-person visits to various healthcare facilities.

Patient Perception of Physician Attire in the Outpatient Setting During the COVID-19 Pandemic.

INTRODUCTION: In response to the SARS-CoV-2 pandemic, physician attire has evolved to incorporate personal protective equipment (PPE). Although PPE is mandated for all healthcare workers, variability exists in choice and availability. The purpose of this study was to determine patient perception of physician attire during the COVID-19 pandemic in an outpatient setting. METHODS: Three hundred sixty-eight patients who presented to our outpatient orthopaedic clinics completed an anonymous survey. In addition to demographic characteristics, patient preferences for attire, PPE, and social distancing were obtained. RESULTS: Scrubs (81%, 298/368) were found to be the most acceptable physician attire. Eye protection (34.2%, 126/368) and gloves (32.6%, 120/368), however, were deemed much less acceptable; 93.5% (344/368) of patients reported that no mask was unacceptable, with 41.0% (151/368) preferring a surgical mask. Predilection for a surgical mask and N95 rose with increasing patient education level. Interestingly, 55.2% (203/368) responded that physicians should stop wearing PPE only when the Center for Disease Control recommends. CONCLUSION: During the COVID-19 pandemic, most of the patients found scrubs to be the most acceptable attire in an office-based outpatient setting. Patients also found physician mask-wearing to be important but are less accepting of providers wearing eye and hand protection.

2021 John N. Insall Award: Aspirin is effective in preventing propagation of infrapopliteal deep venous thrombosis following total knee arthroplasty.

AIMS: The optimal management of an infrapopliteal deep venous thrombosis (IDVT) following total knee arthroplasty (TKA) remains unknown. The risk of DVT propagation and symptom progression must be balanced against potential haemorrhagic complications associated with administration of anticoagulation therapy. The current study reports on a cohort of patients diagnosed with IDVT following TKA who were treated with aspirin, followed closely for development of symptoms, and scanned with ultrasound to determine resolution of IDVT. METHODS: Among a cohort of 5,078 patients undergoing TKA, 532 patients (695 TKAs, 12.6%) developed an IDVT between 1 January 2014 to 31 December 2019 at a single institution, as diagnosed using Doppler ultrasound at the first postoperative visit. Of the entire cohort of 532 patients with IDVT, 91.4% (486/532) were treated with aspirin (325 mg twice daily) and followed closely. Repeat lower limb ultrasound was performed four weeks later to evaluate the status of IDVT. RESULTS: Follow-up Doppler ultrasound was performed on 459/486 (94.4%) patients and demonstrated resolution of IDVT in 445/459 cases (96.9%). Doppler diagnosed propagation of IDVT to the popliteal vein had occurred in 10/459 (2.2%) cases. One patient with an IDVT developed a pulmonary embolus six weeks postoperatively. CONCLUSION: The results of this study demonstrate a low rate of IDVT propagation in patients managed with aspirin. Additionally, no significant bleeding episodes, wound-related complications, or other adverse events were noted from aspirin therapy. Cite this article: Bone Joint J 2021;103-B(6 Supple A):18-22.

Employers: innovators and partners in the delivery of more effective and equitable cancer care.

Employers have the focus, innovative mindset, analytical tools, and drive to partner effectively with innovative cancer care entities to bring better care to their respective members.

Reimagining cancer care delivery-and serving employers-through Access Hope.

In an interview with Evidence-Based Oncology™, City of Hope's Harlan Levine discussed the rising interest of employers in cancer care and how AccessHope can help them deliver better care where their employees live.

Total Hip Arthroplasty in Patients With Avascular Necrosis After Hematopoietic Stem Cell Transplantation.

The immunosuppressive regimens required for hematopoietic stem cell transplantation predispose recipients to complications, including avascular necrosis. Cancer-related comorbidities, immunosuppression, and poor bone quality theoretically increase the risk for perioperative medical complications, infection, and implant-related complications in total joint arthroplasty. This study reviewed 20 primary total hip arthroplasties for avascular necrosis in 14 patients. Outcomes were assessed at routine clinical visits and Harris hip scores were calculated. Follow-up radiographs were evaluated for component malposition, loosening, polyethylene wear, and osteolysis. Average follow-up was 44.5 months for all patients. Postoperative clinical follow-up revealed good to excellent outcomes, with significant improvement in functional outcome scores. There were no periprosthetic infections or revisions for aseptic loosening. There was 1 dislocation on postoperative day 40, which was treated successfully with a closed reduction. Two patients with a prior history of venous thromboembolism developed a pulmonary embolus on postoperative day 13 and 77, respectively. Four patients died several months to years after arthroplasty of complications unrelated to the surgical procedure. Total hip arthroplasty can both be safely performed and greatly improve quality of life in recipients of hematopoietic stem cell transplantation who develop avascular necrosis. However, prolonged venous thromboembolism prophylaxis should be carefully considered in this high-risk patient population. [Orthopedics. 2018; 41(2):e257-e261.].

Same Day Total Hip Arthroplasty Performed at an Ambulatory Surgical Center: 90-Day Complication Rate on 549 Patients.

BACKGROUND: There is an increasing interest in outpatient total hip arthroplasty (THA), as there are perceived benefits to the patient, insurer, and overall healthcare system. However, the safety of outpatient total joint arthroplasty has not been studied. METHODS: Five hundred forty-nine patients who underwent mini-posterior THA at a freestanding independent ambulatory surgical center (ASC) were reviewed. All patients were discharged to home on the day of surgery. RESULTS: The average age of the patients was 54.4 years (range 27-73). The average American Society of Anesthesiologists score was 1.6 (range 1-3). Of the 549 patients, 3 (0.5%) admitted from the surgery center to our local hospital. One patient was admitted for pain control after failing to disclose his long-term high-dose narcotic dependence, one patient was admitted for an acetabular component migration identified on postoperative x-ray, and one patient was admitted for hypotension, bradycardia, and an acute polyarthralgia exacerbation. An additional patient was seen 2 days after surgery in a local emergency department for oversedation secondary to narcotics and later discharged to home. CONCLUSION: Outpatient THA at an ASC is safe and effective when performed on the appropriately indicated patient. There were 4 visits to the hospital within 2 days of surgery. Only 1 was related to medical events, 2 were pain control and/or medication-related and the final was technique-related. Known orthopedic complications including infection, dislocation, and deep vein thrombosis appear consistent with the literature for a series of this size. Same day discharge THA in an ASC is safe and reproducible.

Value, Access, and Cost of Cancer Care Delivery at Academic Cancer Centers.

Key challenges facing the oncology community today include access to appropriate, high quality, patient-centered cancer care; defining and delivering high-value care; and rising costs. The National Comprehensive Cancer Network convened a Work Group composed of NCCN Member Institution cancer center directors and their delegates to examine the challenges of access, high costs, and defining and demonstrating value at the academic cancer centers. The group identified key challenges and possible solutions to addressing these issues. The findings and recommendations of the Work Group were then presented at the Value, Access, and Cost of Cancer Care Policy Summit in September 2015 and multi-stakeholder roundtable panel discussions explored these findings and recommendations along with additional items.

The economic recession and its effect on utilization of elective total joint arthroplasty.

The United States economy entered a recession in December 2007. This study aims to determine whether the utilization of elective orthopedic surgeries has been impacted by this recession. From January 2007 to December 2009 at a single private practice in New Jersey, 4820 total joint replacement procedures were scheduled, of which 649 of those were cancelled. The rate of cancellation for financial reasons was compared to multiple economic measures by linear regression analysis. The results show that the rate of financially motivated cancellations increased over time concurring with multiple financial markers reflecting the economic recession. The results suggest that the recession has created a financial barrier for a significant number of Americans, leading to decreased utilization of care. While there was a statistically significant increase in cancellations for financial reasons, the overall rate of cancellations in the total joint population is still low, representing only about 1% of all cases.

Oxidative properties and surface damage mechanisms of remelted highly crosslinked polyethylenes in total knee arthroplasty.

PURPOSE: Remelted highly crosslinked polyethylenes (HXLPEs) were introduced in total knee replacement (TKR) starting in 2001 to reduce wear and particle-induced lysis. The purpose of this study was to investigate the damage mechanisms and oxidative stability of remelted HXLPEs used in TKR. METHODS: A total of 186 posteriorly stabilised tibial components were retrieved at consecutive revision operations. Sixty nine components were identified as remelted HXLPE. The conventional inserts were implanted for 3.4 ± 2.7 years, while the remelted components were implanted 1.4 ± 1.2 years. Oxidation was assessed using Fourier transform infrared spectroscopy. RESULTS: Remelted HXLPE inserts exhibited lower oxidation indices compared to conventional inserts. We were able to detect slight regional differences within the HXLPE cohort, specifically at the bearing surface. CONCLUSION: Remelted HXLPE was effective at reducing oxidation in comparison to gamma inert sterilised controls. Additional long-term HXLPE retrievals are necessary to ascertain the long term in vivo stability of these materials in TKR.

Fracture of the proximal tibia after revision total knee arthroplasty with an extensor mechanism allograft.

Extensor mechanism reconstruction with an extensor mechanism allograft (EMA) remains one of the most reliable methods for treating the extensor mechanism deficient total knee arthroplasty. We report 3 patients who were treated with an EMA who sustained a proximal tibial shaft fracture. In all 3 cases, a short tibial component was present that ended close to the level of the distal extent of the bone block. When performing an EMA, it is important to recognize that the tibial bone block creates a stress riser and revision to a long-stemmed tibial component should be strongly considered to bypass this point to minimize the risk of fracture.

Early results show WellPoint's patient-centered medical home pilots have met some goals for costs, utilization, and quality.

Primary care must be reengineered to improve outcomes and affordability. To achieve those goals, WellPoint invested in ten patient-centered medical home pilots that encourage care coordination, preventive care, and shared decision making. Two of the three pilots described in this article-in Colorado and New Hampshire-layer incentive payments for care coordination and quality improvement on top of a traditional fee-for-service payment. The third-in New York-pays doctors an enhanced fee that is tied to achievement of quality levels. Preliminary evaluations show encouraging signs that the Colorado and New Hampshire pilots are meeting some cost, utilization, and quality objectives. A full evaluation in all three states is ongoing. To help enable systemwide transformation, WellPoint is now applying similar payment strategies to primary care practices that may not have the resources to become full-fledged medical homes.

Metal-on-metal total hip arthroplasty: causes and high incidence of early failure.

Early failures of metal-on-metal total hip arthroplasty (THA) occur due to aseptic loosening, metal hypersensitivity reactions, pseudotumor formation, and component seizing. The purpose of this study was to investigate the timing, common modes of failure, clinical outcomes, and incidence of metal-on-metal THA revisions. A review was performed of 80 patients who underwent revision of a failed metal-on-metal THA for any reason. The most common reason for metal-on-metal failure was aseptic acetabular loosening, with a rate of 56.25% (45/80 patients). Early failure of metal-on-metal THAs was noted, with 78% of these revisions being performed within 2 years of the index operation and 92.5% within 3 years. Furthermore, 13% of patients experienced significant localized soft tissue reactions. Mean preoperative Harris Hip Score was 42.35 ± 14.24 and mean postoperative Harris Hip Score was 66.5 ± 23.2 (range, 9.55-95.4), with an average follow-up of 438 ± 492 days (range, 40-2141), or 1.2 years.It is imperative that clinicians be cognizant of the fact that the proposed advantages of metal-on-metal THA are not without potential detrimental sequelae. This article proposes an algorithm to aid in diagnosing the etiology of a painful metal-on-metal THA, as well as 2 classification schemes regarding metal-on-metal THA complications to help direct treatment.

Do dynamic cement-on-cement knee spacers provide better function and activity during two-stage exchange?

BACKGROUND: Implantation of an antibiotic bone cement spacer is used to treat infection of a TKA. Dynamic spacers fashioned with cement-on-cement articulating surfaces potentially facilitate patient mobility and reduce bone loss as compared with their static counterparts, while consisting of a biomaterial not traditionally used for load-bearing articulations. However, their direct impact on patient mobility and wear damage while implanted remains poorly understood. QUESTIONS/PURPOSES: We characterized patient activity, surface damage, and porous structure of dynamic cement-on-cement spacers. METHODS: We collected 22 dynamic and 14 static knee antibiotic cement spacers at revision surgeries at times ranging from 0.5 to 13 months from implantation. For these patients, we obtained demographic data and UCLA activity levels. We characterized surface damage using the Hood damage scoring method and used micro-CT analysis to observe the internal structure, cracking, and porosity of the cement. RESULTS: The average UCLA score was higher for patients with dynamic spacers than for patients with static spacers, with no differences in BMI or age. Burnishing was the only prevalent damage mode on all the bearing surfaces. Micro-CT analysis revealed the internal structure of the spacers was porous and highly inhomogeneous, including heterogeneous dispersion of radiopaque material and cavity defects. The average porosity was 8% (range, 1%-29%) and more than ½ of the spacers had pores greater than 1 mm in diameter. CONCLUSIONS: Our observations suggest dynamic, cement-on-cement spacers allow for increased patient activity without catastrophic failure. Despite the antibiotic loading and internal structural inhomogeneity, burnishing was the only prevalent damage mode that could be consistently classified with no evidence of fracture or delamination. The porous structure of the spacers varied highly across the surfaces without influencing the material failure.

Gull-wing osteotomy for the treatment of the deficient patella in revision total knee arthroplasty.

Reconstruction of the deficient patella remains a challenge in revision total knee arthroplasty. Twelve consecutive patients who had a knee revision in which a nonresurfacable patella was treated with a gull-wing patellar osteotomy were followed using a computerized database. Radiographs revealed successful healing of the osteotomy in all patients with central tracking of the patella in the trochlear groove. There was a significant improvement in the range of motion and Knee Society scores. There were no patellar fractures or significant patellar malalignment in this series. This technique has shown promising results for the treatment of the nonresurfacable patella during revision total knee arthroplasty, and we conclude that it is a viable method of patellar salvage reserved for the most advanced cases of patellar bone stock compromise.

Total hip arthroplasty with a collarless, tapered, fiber metal proximally coated femoral stem: minimum 5-year follow-up.

The purpose of this study was to evaluate the midterm results, osteointegration potential, and implant-related complications of a cementless, collarless, proximally coated, distally tapered femoral hip prosthesis. The clinical and radiographic results for 129 hips in 116 patients after total hip arthroplasty with a Fiber Metal Taper (Zimmer, Inc ,Warsaw, Ind) femoral stem are reported. One hundred twenty-two (95%) hips were available for the minimum of 5 years clinical and radiographic follow-up. The mean duration of follow-up was 81 months (range, 60-104 months). The mean Harris hip score improved from 44 to 92 at the most recent follow-up. All femoral components were clinically stable with radiographic evidence of bone ingrowth. There has been no evidence of subsidence greater than 2 mm, no significant thigh pain, and no femoral revisions for any reason. Total hip arthroplasty with the Fiber Metal Taper stem demonstrates good clinical and radiographic results at midterm follow-up.