Risk Factors for Unexpected Admission Following Lumbar Spine Laminectomy: A National Database Study.

Introduction Laminectomy is one of the most common orthopedic spine surgeries performed in the United States. Compared to other spine operations such as fusions, laminectomies in isolation are of lower morbidity. However, complications may arise that result in readmission to an inpatient healthcare facility. The purpose of this study is to identify the demographics and risk factors associated with unplanned 30-day readmission following a laminectomy. Methods The American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) database was queried for patients who underwent a laminectomy procedure from 2015 to 2019 using CPT code 63030. This query yielded 61,708 cases. Demographic, lifestyle, comorbidity, and peri-operative factors were recorded. Independent samples Student's t-tests, chi-squared, and, where appropriate, Fisher's exact tests were used in univariate analyses to identify demographic, lifestyle, and peri-operative variables related to 30-day readmission following a laminectomy procedure. Multivariate logistic regression modeling was subsequently performed. Odds ratios (ORs) with 95% confidence intervals (CIs) were calculated and reported. Results Of the 61,708 patients included in our sample, 2,359 were readmitted within 30 days of surgery, corresponding to a readmission rate of 3.82%. Results of the univariate analysis revealed statistically significant relationships between readmission status and the following patient variables: patient age, sex, BMI, ASA classification, race, bleeding disorder, chronic obstructive pulmonary disease (COPD), diabetes, hypertension, congestive heart failure (CHF), chronic steroid use, total operative time, and tobacco use (p < 0.05). Multivariate logistic regression modeling confirmed that the following patient variables were associated with statistically significantly increased odds of readmission: age greater than 65 (p < 0.05), female sex (p = 0.013), bleeding disorder (p = 0.011), diabetes (p = 0.006), current smoker (p = 0.010), COPD (p < 0.001), steroid use (p = 0.006), ASA Class II or above (p < 0.05), and total operative time (p < 0.001). Conclusion Unplanned 30-day readmission after laminectomy is infrequent. However, increasing age, female sex, steroid use, current smokers, bleeding disorders, diabetes, COPD, CHF, a higher ASA classification, and longer operative times are independent risk factors for readmission following laminectomy.

Industry Payments to Foot and Ankle-Trained Orthopedic Surgeons: An Analysis of the Open Payments Database From 2014 to 2019.

Introduction The authors examined if the transparency in industry payments to foot and ankle-trained orthopedic surgeons resulted in the following changes to the (1) median general payments to surgeons, (2) trend in median payments to surgeons across all subcategory payments, and (3) trend in median payments to surgeons in 11 regions of the United States. Methods A retrospective review of the Centers for Medicare and Medicaid Services (CMS) and Open Payments Database (OPD) was performed to identify all industry payments made by drug and medical device companies to orthopedic surgeons (N = 3,835) between January 1, 2014, and December 31, 2019. Descriptive statistics were calculated, and trend analyses in annual payments, number of payments to surgeons per year, payment subtypes, and regional distributions were analyzed. Results A total of 53,280 payments totaling $53,454,850.56 were made to orthopedic foot and ankle surgeons between 2014 and 2019. Mean and median payments were $1,003.28 and $60.19, respectively. Statistically significant differences in mean payment amounts were observed by year (p = 0.001) with a highly statistically significant, strong increase in the number of payments made over the six-year period (r = 0.97, p < 0.001). The greatest increases in median individual payments were observed for gifts (277.1%; r = 0.18, p = 0.05), education (250.6%; r = 0.17, p < 0.001), and royalties and licensing (72.1%; r = 0.05, p = 0.04). Statistically significant increasing trends in median payments over time were observed for the Northeast (p < 0.001) and South regions (p < 0.001). Discussion The results of this study demonstrate the increase in payments made across the six-year time period. The study demonstrates that there is a shift in the type of payments from speaker fees, entertainment, and lodging to education, gifts, honoraria, royalties, and consulting. Conclusion Since the OPD release, no significant decrease was identified in the financial relationship between foot and ankle surgeons and the industry; rather, an increase was observed. This increase in education, royalties, and consulting shows that more foot and ankle surgeons are getting involved in the industry, contrary to expectations. The partnership between industry and physicians can help to improve innovation and bring new ideas to the future of orthopedics.

Management of Grade 1 Open Distal Radius Fractures: A Survey of Practicing Surgeons.

Introduction Standard of care management for open fractures historically mandates emergent systemic antibiotic administration, followed by urgent irrigation and debridement in the operating room, regardless of injury severity. However, significant controversy exists regarding the specific implementation and importance of these commonly accepted guidelines. We aimed to define differences in the management of grade 1 open distal radius fractures. Methods An anonymous online survey was distributed to attending surgeon members of either the Orthopaedic Trauma Association (OTA) between January 2019 and April 2019 or the New York Society for Surgery of the Hand (NYSSH) in January 2019. Results A total of 68 attending surgeons responded to the survey. A total of 24 OTA members and 40 NYSSH members replied and were included in the study. Several factors influenced management in addition to the level of contamination. Of the surgeons, 68% stated that litigation was not a major factor of concern. When compared to surgeons who trained in trauma fellowships, more surgeons who trained in hand/upper extremity fellowships considered closed reduction alone as reasonable definitive treatment (when excluding antibiotic administration and debridement considerations, p = 0.024) and oral antibiotics as a supplement to IV antibiotics (p < 0.001). Of the surgeons, 90% would nonoperatively treat a patient who presented with a grade 1 open distal radius fracture greater than 72 hours after injury with stable and acceptable alignment on X-rays. Conclusion Some surgeons are willing to deviate from standard-of-care management protocols.

Industry Payments to Orthopedic Surgeons Among All Subspecialties: An Analysis of the Open Payments Database From 2014 to 2019.

Introduction Since the passage of the Physician Payments Sunshine Act in 2010, the Centers for Medicare and Medicaid Services (CMS) started the National Physician Payment Transparency Program and Open Payments Database (OPD), which allowed for public access to financial disclosures between physicians and industry. Although orthopedic surgeons receive the highest average payments when compared to other specialties, there has been limited data evaluating these payments among the different orthopedic subspecialties. The purpose of this study was to analyze all industry payments made across all subspecialties among orthopedic surgeons. Methods A retrospective review of the CMS OPD was performed to identify all industry payments made by drug and medical device companies to orthopedic surgeons (N = 28,475) between January 1, 2014, and December 31, 2019. Descriptive statistics were calculated for the number, individual value, and total value of industry payments, stratified by payment type and orthopedic subspecialty. Results A total of 1,048,573 payments (approximately $1.6 billion) were made to orthopedic surgeons between 2014 and 2019. The average orthopedic surgeon received 6.14 payments per year (SD = 29.39), with a mean individual payment amount of $1,542.32. Royalties or licensing comprised the greatest proportion of open payments, followed by consulting fees. Adult reconstruction (M = $225,131.10) and spine (M = $197,404.74) received significantly greater total payments when compared to all other subspecialties (all p-values ≤ 0.001). Differences in total payments made to trauma (M = $73,789.65), sports medicine (M = $60,988.09), foot and ankle (M = $45,007.45), pediatric orthopaedics (M = $35,898.54), general orthopaedics (M = $28,405.81), and hand (M = $14,027.76) were all found to be statistically equivalent (all p--values > 0.20). Discussion Increased collaboration between physicians and industry has resulted in the rapid advancement of innovation that can have sizeable financial implications among orthopedic surgeons. There exists significant heterogeneity in open payments made to orthopedic surgeons when stratified by subspecialty. Adult reconstructive and spine surgeons were the most compensated whereas hand and general orthopaedic surgeons received the least.

A Review of Federal and Statewide Guidelines and Their Effects on Orthopedics.

In the past three decades, the use of opioids has risen tremendously. Pain was named the "fifth patient vital sign" in the 1990s, and from that point, opioid usage has continued to grow throughout the 2010s leading to its recognition as a crisis. The United States is responsible for 80% of the global opioid usage while only accounting for less than 5% of the global population. Previously opioids were mostly used to treat acute pain, however, opioids have been most recently used to manage chronic pain as well. The opioid crisis has presented new challenges in treating pain while preventing the abuse of these medications in a system that lacks standardization of treatment guidelines across the United States. Therefore, the authors of this review examine the current national recommendations to help manage the ongoing opioid crisis and explore how they may impact orthopedic patient care.

Risk factors for unexpected readmission and reoperation following open procedures for shoulder instability: a national database study of 1,942 cases.

BACKGROUND: The purpose of this study was to identify demographics and risk factors associated with unplanned 30-day readmission and reoperation following open procedures for shoulder instability and examine recent trends in open shoulder instability procedures. METHODS: The American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) database was queried using current procedural terminology (CPT) codes 23455, 23460, and 23462 to find patients who underwent shoulder instability surgery from 2015 to 2019. Independent sample Student t-tests and chi-square tests were used in univariate analyses to identify demographic, lifestyle, and perioperative variables related to 30-day readmission following repair for shoulder instability. Multivariate logistic regression modeling was subsequently performed. RESULTS: In total, 1,942 cases of open surgical procedures for shoulder instability were identified. Within our study sample, 1.27% of patients were readmitted within 30 days of surgery, and 0.85% required reoperation. Multivariate logistic regression modeling confirmed that the following patient variables were associated with a statistically significant increase in the odds of readmission: open anterior bone block/Latarjet-Bristow procedure, being a current smoker, and a long hospital stay (all P<0.05). Multivariate logistic regression modeling confirmed statistically significant increased odds of reoperation with an open anterior bone block or Latarjet-Bristow procedure (P<0.05). CONCLUSIONS: Unplanned 30-day readmission and reoperation after open shoulder instability surgery is infrequent. Patients who are current smokers, have an open anterior bone block or Latarjet-Bristow procedure, or a longer than average hospital stay have higher odds of readmission than others. Patients who undergo an open anterior bone block or Latarjet-Bristow procedure have higher odds of reoperation than those who undergo an open soft-tissue procedure. Level of evidence: III.

Risk factors for unexpected admission following arthroscopic and open treatment of shoulder instability: a national database study of 11,230 cases.

BACKGROUND: Shoulder instability procedures have low morbidity; however, complications can arise that result in readmission to an inpatient healthcare facility. The purpose of this study is to identify the demographics and risk factors associated with unplanned 30-day readmission and reoperation following arthroscopic and open treatment for shoulder instability. METHODS: The American College of Surgeons National Surgical Quality Improvement Program database was queried to find patients who underwent shoulder instability surgery from 2015 to 2019. Independent sample Student t-tests, chi-square, and (where appropriate) Fisher's exact tests were used in univariate analyses to identify demographic, lifestyle, and perioperative variables related to 30-day readmission and reoperation following repair for shoulder instability. Multivariate logistic regression modeling was subsequently performed. RESULTS: Of the 11,230 cases included in our sample, only 0.54% were readmitted, and 0.23% underwent reoperation within the 30-day postoperative period. Multivariate logistic regression modeling confirmed that the following patient variables were associated with statistically significantly increased odds of readmission and reoperation: open repair, congestive heart failure (CHF), and hospital length of stay. CONCLUSIONS: Unplanned 30-day readmission and reoperation after shoulder instability surgery is infrequent. Patients with American Society of Anesthesiologists class II, CHF, longer than average hospital length of stay, or an open procedure have higher odds of readmission than patients without those factors. Patients who have CHF, longer than average hospital length of stay, and open surgery have higher odds of reoperation than others. Arthroscopic procedures should be used to manage shoulder instability, if possible.

Wound Management following Total Knee Arthroplasty: An Updated Review.

Optimal wound closure techniques following total knee arthroplasty (TKA) have focused on enhancing healing potential, preventing infection, yielding satisfactory cosmesis, and allowing early ambulation and functionality. An appropriate layered closure and management of the TKA typically involves addressing the (1) deep fascial layer; (2) subdermal layer; (3) intradermal layer, including the subcuticular region; and (4) final application of a specific aseptic dressing, each of which are covered here in detail. This focused critical review of the literature discusses traditional techniques used in all layers of wound closure following TKA while introducing several emerging popular techniques. For example, absorbable barbed skin sutures and occlusive dressings have the potential to reduce operative time, limit the need for early postoperative visits, obviate the need for suture or staple removal, and safely promote patient communication via telemedicine. As novel wound closure techniques continue to emerge and traditional approaches are improved upon, future comparative studies will assist in elucidating the key advantages of various options. In an extremely important field that has tremendous variability, these efforts may enable the reaching of a classically elusive standard of care for these techniques.

Patient Perceptions of Wearable and Smartphone Technologies for Remote Outcome Monitoring in Total Knee Arthroplasties.

While there is enthusiasm for wearables and smartphone technologies in evaluating clinical outcomes among clinicians, less is known about the willingness of patients who have osteoarthritis (OA) to consent for remote outcome monitoring. We developed an Institutional Review Board-approved questionnaire to assess patient perceptions of remote monitoring technologies in a high-volume orthopaedic clinical center. Fifty total knee arthroplasty (TKA) patients (56% female; mean age: 61 years, range: 23-89) and fifty nonoperative OA knee patients (54% female; mean age: 58 years, range: 25-89) routinely consulted in the clinic as part of their OA treatment and consented to participate in the study. Patient perceptions were compared using Pearson's chi-square analyses with a significance threshold of p < 0.05. We found that TKA patients were more receptive to the use of smartphone apps (84 vs. 60%, p = 0.008) and wearable sensors (80 vs. 48%, p < 0.001) and learning to use custom wearables (72 vs. 38%, p = 0.002) than nonoperative OA knee patients as part of their treatment. Likewise, the majority of TKA patients were willing to use the global positioning system in their postoperative technology (54 vs. 18%, p < 0.001), especially if they were only active during certain circumstances (62 vs. 24%, p < 0.001). TKA patients also expressed willingness to have their body movement (68%), balance (70%), sleep (76%), and cardiac output (80%) tracked using remote technologies. Overall, we found that TKA patients were highly receptive to using wearable technology in their treatments, whereas nonoperative OA knee patients were generally unreceptive. Our study challenges the concept that current wearable technology approaches will be generally effective as a tool to remotely monitor all patients across the OA severity landscape.

Heterotopic Ossification Prophylaxis Following Operative Fixation of Acetabular Fractures: A Systematic Review.

INTRODUCTION: Heterotopic ossification (HO) is a well-recognized complication following operative fixation of acetabular fractures with a range of severity and clinical consequences. The purpose of this review was to: (1) report the incidence of heterotopic ossification (HO) formation following operative fixation of acetabular fractures; (2) determine the effectiveness of prophylactic treatments for HO; and (3) assess the radiographic severity of HO with and without prophylactic treatment. MATERIALS AND METHODS: A literature search for peer-reviewed articles was conducted utilizing a variety of research databases. PRISMA guidelines were followed and included in this review were full-length, English language manuscripts published before September 2019, using the following search criteria: "heterotopic ossification AND acetabulum OR acetabular." Studies that reported HO as one of the reported outcomes were included. Articles were excluded if radiographic HO was not reported and if it was evaluated in surgeries other than those involved in acetabular fractures. Extracted data included, but was not limited to: type of prophylaxis; incidence of HO; severity of HO based on the Brooker classification; and statistical significance. A methodologic quality appraisal of the included studies was also conducted. A total of 54 full-text studies with 5,890 patients with operatively fixed acetabular fractures met inclusion criteria. There were four level I studies, four level II study, 26 level III studies, and 20 level IV studies. RESULTS: The overall incidence of HO after acetabular fracture surgery was 28.4%. The rate of HO formation was: 34.9% without prophylaxis, 28.3% with non-steroidal anti-inflammatory drugs (NSAID) prophylaxis, and 21.2% with radiation therapy (RT). Patients receiving a combination of both RT and NSAIDs developed HO 21.8% of the time. The rate of radiographic severe HO was 13.9% (range, 0-75%) in patients without prophylaxis, 9.4% (range, 0-50%) with NSAID prophylaxis, 5.7% (range, 0-12.8%) with RT prophylaxis, and 11.7% (range, 0-18.5%) with the combination of RT and NSAIDs. CONCLUSION: With the current literature collected in this systematic review, there was a lower incidence and severity of heterotopic bone formation following acetabular fracture fixation using radiation prophylaxis compared to NSAIDs or no treatment. The available literature is heterogeneous in fracture characteristics, surgical approaches, and prophylactic regimens with a general lack of randomized control trials. Further prospective studies are required to make definitive claims on the optimal prophylactic strategy to prevent heterotopic ossification.

The Epidemiology of Revision Total Knee Arthroplasty.

With an expected increase in total knee arthroplasty (TKA) procedures, revision TKA (rTKA) procedures continue to be a burden on the United States health care system. The evolution of surgical techniques and prosthetic designs has, however, provided a paradigm shift in the etiology of failure mechanisms of TKA. This review can shed light on the current reasons for revision, which may lead to insights on how to improve outcomes and lower future revision risks. We will primarily focus on the epidemiology of rTKA in the present time, but we will also review this in the context of various time periods to see how the field has evolved. We will review rTKAs: 1) prior to 1997; 2) between 1997 and 2000; 3) between 2000 and 2012; and 3) in the modern era since 2012. We will further subdivide each of the sections into reasons for early (first 2 years after index procedure) versus late revisions (greater than 2 years after index procedure). In doing so, it was determined that prior to 1997, the most prevalent causes of failure were infection, patella failure, polyethylene wear, and aseptic loosening. After a major shift of failure mechanisms was described by Sharkey et al, polyethylene wear and aseptic loosening became the leading causes for revision. However, with the improved manufacturing technology and implant design, polyethylene wear was replaced with aseptic loosening and infection as the leading causes of failure between 2000 and 2012. Since that time, in the modern era of TKA, mechanical loosening and infection have taken over the most prevalent causes for failure. Hopefully, with continued developments in component design and surgical techniques, as well as increased focus on infection reduction methods, the amount of rTKA procedures will decline.

The Utility of Telehealth in the Recovery From the COVID-19 Pandemic.

Telehealth has recently been used more often in an attempt to protect practitioners and patients during the 2019 coronavirus infectious disease (COVID-19) crisis. Despite telehealth's existence, there was no prior need to fully realize its potential. Recently, technological innovations in orthopaedic surgery have assisted in making this modality more useful. However, it is important to continually educate the medical community regarding these technologies and their interplay to improve patient care. Therefore, our purpose is to provide information on telehealth by assessing: (1) steps the hospital/system are taking to reduce COVID-19 exposure for teams and patients; (2) new technologies allowing for the optimization of patient safety; and (3) use of telehealth for postoperative follow up. We will demonstrate that telehealth and its associated strategies can be used effectively to decrease COVID-19 exposure risks for both medical staff and patients during these rapidly changing and uncertain times.

Social determinants of health in total knee arthroplasty : are social factors associated with increased 30-day post-discharge cost of care and length of stay?

AIMS: Social determinants of health (SDOHs) may contribute to the total cost of care (TCOC) for patients undergoing total knee arthroplasty (TKA). The aim of this study was to investigate the association between demographic data, health status, and SDOHs on 30-day length of stay (LOS) and TCOC after this procedure. METHODS: Patients who underwent TKA between 1 January 2018 and 31 December 2019 were identified. A total of 234 patients with complete SDOH data were included. Data were drawn from the Chesapeake Regional Information System, the Centers for Disease Control social vulnerability index (SVI), the US Department of Agriculture, and institutional electronic medical records. The SVI identifies areas vulnerable to catastrophic events with four themed scores: socioeconomic status; household composition and disability; minority status and language; and housing and transportation. Food deserts were defined as neighbourhoods located one or ten miles from a grocery store in urban and rural areas, respectively. Multiple regression analyses were performed to determine associations with LOS and costs after controlling for various demographic parameters. RESULTS: Divorced status was significantly associated with an increased LOS (p = 0.043). Comorbidities significantly associated with an increased LOS included chronic obstructive pulmonary disease/asthma and congestive heart failure (p = 0.043 and p = 0.001, respectively). Communities with a higher density of tobacco stores were significantly associated with an increased LOS (p = 0.017). Comorbidities significantly associated with an increased TCOC included chronic obstructive pulmonary disease (p = 0.004), dementia (p = 0.048), and heart failure (p = 0.007). Increased TCOCs were significantly associated with patients who lived in food deserts (p = 0.001) and in areas with an increased density of tobacco stores (p = 0.023). CONCLUSION: Divorced marital status was significantly associated with an increased LOS following TKA. Living in food deserts and in communities with more tobacco stores were significant risk factors for increased LOS and TCOC. Food access and ease of acquiring tobacco may both prove to be prognostic of outcome after TKA and an opportunity for intervention. Cite this article: Bone Joint J 2021;103-B(6 Supple A):113-118.

Higher Patient Complexities are Associated with Increased Length of Stay, Complications, and Readmissions After Total Hip Arthroplasty.

INTRODUCTION: There is an increased incidence of complex patients undergoing total hip arthroplasty (THA), which demands a rigorous preoperative, intraoperative, and postoperative assessment. It is important how increases in patient complexity impact a variety of patient outcomes. Therefore, the purpose of our study is to determine if a higher Elixhauser Comorbidity Index (ECI), a measure of patient complexity, is correlated with: 1) longer hospital length of stay; 2) increased 90-day medical complications; 3) higher 90-day readmissions; and 4) greater two-year implant-related complications following primary THA. MATERIALS AND METHODS: Patients undergoing primary THA from January 1, 2004 to December 31, 2015 were queried from the Medicare Standard Analytical Files using the International Classification of Disease, ninth revision (ICD-9) procedure code 81.51. The queried patients (387,831) were filtered by ECI scores of 1 to 5. Patients who have ECI scores of 2 to 5 represented the study cohorts and were matched according to age and sex to patients who have the lowest ECI score (ECI of 1). All cohorts were longitudinally followed to assess and compare hospital length of stay, 90-day medical complications, 90-day readmissions, and two-year implant-related complications. We compared odds-ratios (OR), 95% confidence intervals (95% CI), and p-values using logistic regression analyses and Welch's t-tests. RESULTS: Patients who have ECI scores greater than 1 had higher hospital length of stay (p<0.001), 90-day medical complications (p<0.001), 90-day readmissions (p<0.001), and two-year implant-related complications (p<0.001). Patients who have an ECI score of 2 (1.26, 95% CI: 1.20-1.32), ECI of 3 (1.61, 95% CI: 1.53-1.69), ECI of 4 (2.05, 95% CI: 1.95-2.14), and ECI of 5 (2.32, 95% CI: 2.21-2.43) had an increasing trend for readmissions, with higher ECI scores correlating with greater odds of readmission following primary THA. Two-year implant-related complications also showed a similar increasing trend with greater patient complexity. Patients who had an ECI score of 5 (2.54, 95% CI: 2.39-2.69) had more implant-related complications compared to patients who had an ECI score of 2 (1.39, 95% CI:1.31-1.48). CONCLUSION: The results of this study illustrate that a higher Elixhauser-Comorbidity Index is an independent risk factor for longer hospital length of stay, higher 90-day medical complications, greater 90-day readmissions, and increased two-year implant-related complications following primary THA. This study is important as it further defines and heightens awareness of adverse events for complex patients undergoing this procedure. Future studies can examine if these events can potentially be mitigated through reductions in ECI scores prior to surgery and increased incentives for the healthcare team.

Cementless Tritanium Baseplate Total Knee Arthroplasty: Survivorship and Outcomes at 5-Year Minimum Follow-Up.

BACKGROUND: Newer generation cementless total knee arthroplasty (TKA) designs have provided stronger osteointegration between the implant and bone. Despite excellent survivorship and outcomes with cemented TKAs, areas of concern within the bone-cement interface remain a concern and necessitate studies on alternative constructs. This study assesses: (1) implant survivorship; (2) clinical outcomes; and (3) complications with radiographic outcomes at a 5-year minimum follow-up of cementless highly porous titanium-coated baseplates in TKAs. METHODS: Part of this study has been reported. We retrospectively reviewed a prospectively collected database at a single high-volume institution between July 1, 2013 and June 30, 2014 for patients who underwent a primary TKA using cementless highly porous titanium-coated baseplate implants. Patients were evaluated clinically at postoperative follow-up visits at a minimum of 5 years. To calculate the survivorship, Kaplan-Meier analysis was performed to determine all-cause, aseptic, and septic implant survivorship at each final follow-up for all patients. RESULTS: A total of 228 TKAs were performed and followed for a minimum of 5 years (range, 5-6 years). As of the latest follow-up, one case of septic loosening of the patellar button and one case of patellar dislodgment secondary to physical manipulation were recorded and revised. Overall, the cohort displayed implant survivorship of 99.5% at 5-year minimum follow-up. Improvements were seen in both Knee Society pain and function scores and were 37 points (range, 17-60 points) and 28 points (range, 15-47 points), respectively. The mean improvement in flexion was 17.8 (range, -20 to 40 degrees) and mean improvement in extension was -5.5 (range, -30 to 5 degrees). DISCUSSION: Cementless TKAs serve as strong alternative choice to cemented TKAs. Although cemented fixation is commonly known as the gold standard, results of this study confirm the findings of previous investigations on the survivorship of cementless TKA implants. Therefore, patients who undergo primary TKA with a cementless tritanium baseplate can expect excellent clinical outcomes at a 5-year minimum follow-up.

Computer-Assisted Navigation in Total Knee Arthroplasty.

Manual total knee arthroplasty (TKA) has successfully treated end-stage knee osteoarthritis for several years. However, recent technological advancements have enabled surgeons to perform TKA with more accuracy and precision. Aligning the femoral and tibial components perpendicular to the mechanical axes of the femur and tibia is a fundamental principle for restoring knee kinematics and soft-tissue balance. Computer-assisted robotic TKA has proven its ability to fine tune lower leg alignment, component position, and soft-tissue balancing. Furthermore, robotic-assisted TKA (RATKA) offers the additional benefit of improving soft-tissue protection compared to manual techniques. Numerous systems have been developed in the advancement of technology in computer processing, and the number of robotic surgical systems is increasing as well. The three main categories of navigation systems can be classified as: image-based console navigation, imageless console navigation, and accelerometer-based handheld navigation systems. The purpose of this review was to describe emerging technologies for TKA. Specifically, we outline the available literature pertaining to each system with regards to their: (1) accuracy and precision of component alignment; (2) soft-tissue protection; (3) postoperative outcomes; and (4) other reported outcomes such as costs.

Cementless Fixation for Total Knee Arthroplasty in Various Patient Populations: A Literature Review.

The number of total knee arthroplasties (TKAs) performed in the United States has increased considerably in recent years, with a major contribution from younger patients. Maximizing survivorship of these implants has always been a point of emphasis. Early TKA designs with cementless fixation were associated with high rates of complications and implant failures. However, recent advances in cementless designs have shown excellent results. The decision to use cemented or cementless fixation for patients undergoing TKA is typically based on the surgeon's experience and preference. However, several patient characteristics must also be taken into account. The purpose of this review was to describe the clinical outcomes of studies in which a cementless TKA system was utilized for patients who (1) were less than 60 years of age, (2) were greater than 75 years of age, (3) were obese, (4) had rheumatoid arthritis, and (5) had osteonecrosis of the knee. Based on the studies included in this review, it appears that cementless fixation is a viable option for patients who have all of the above demographics.

Clostridium difficile infection in the USA: incidence and associated factors in revision total knee arthroplasty patients.

INTRODUCTION: Revision total knee arthroplasty (TKA) procedures performed secondary to periprosthetic joint infection (PJI) are associated with significant morbidity and mortality. These poor outcomes may be further complicated by postoperative infection requiring antibiotics. However, antibiotic overuse may suppress patients' bacterial flora, leading to Clostridium difficile infection (CDI). Therefore, we aimed to study the: (1) incidence; (2) costs; and (3) risk factors associated with CDI in revision TKA patients. METHODS: The National Inpatient Sample database was queried for individuals diagnosed with PJI who underwent revision TKA between 2009 and 2013 (n = 83,806). Patients who developed CDI during their inpatient stay were identified (n = 799). Logistic regression analysis was conducted to assess the association between hospital- and patient-specific characteristics and the development of CDI. RESULTS: The incidence of CDI after revision TKA was 1.0%. These patients were older (mean age 69.05 vs. 65.52 years), had greater LOS (median 11 vs. 5 days) and greater costs ($30,612.93 vs. 18,873.75), and experienced higher in-hospital mortality (3.6 vs. 0.5%; p < 0.001 for all) compared to those without infection. Patients with CDI were more likely to be treated in urban, not-for-profit, medium/large hospitals in the Northeast or Midwest (p < 0.05 for all) and to have underlying depression (OR 4.267; p = 0.007) or fluid/electrolyte disorders (OR 3.48; p = 0.001). CONCLUSION: Although CDI is rare following revision TKA, it can have detrimental consequences. We demonstrate that CDI is associated with longer LOS, higher costs, and greater in-hospital mortality. With increased legislative pressure to lower healthcare expenditures, it is crucial to identify means of preventing costly complications.