Team Approach: Perioperative Optimization for Total Joint Arthroplasty

The removal of total hip arthroplasty from the inpatient-only list has improved patient selection and expanded optimization efforts

INTRODUCTION

On January 1, 2020, the Centers for Medicare and Medicaid Services removed total hip arthroplasty (THA) from the Inpatient-Only (IPO) list. This study evaluated patient demographics and comorbidities, pre-operative optimization efforts, and 30-day outcomes of patients undergoing outpatient THA pre- and post- IPO-removal. The authors hypothesized that patients undergoing THA post-IPO removal would have improved optimization of modifiable risk factors and equivalent 30-day outcomes.

METHODS

There were 17,063 outpatient THA in a national database stratified by surgery performed pre- (2015 to 2019: 5,239 patients) and post-IPO (2020: 11,824 patients) removal. Demographics, comorbidities, and 30-day outcomes were compared with univariable and multivariable analyses. Pre-operative optimization thresholds were established for the following modifiable risk factors: albumin, creatinine, hematocrit, smoking history, and body mass index. The percentage of patients who fell outside the thresholds in each cohort were compared.

RESULTS

Patients undergoing outpatient THA post-IPO removal were significantly older; mean age 65 years (range, 18 to 92) vs 62 (range, 18 to 90) years (P<0.01), with a higher percentage of American Society of Anesthesiologists scores 3 and 4 (P<0.01). There was no difference in 30-day readmissions (P=0.57) or reoperations (P=1.00). A significantly lower percentage of patients fell outside the established threshold for albumin (P<0.01) post-IPO removal, and trended towards lower percentages for hematocrit and smoking status.

CONCLUSION

The removal of THA from the IPO list expanded patient selection for outpatient arthroplasty. Pre-operative optimization is critical to minimize post-operative complications, and the current study demonstrates that 30-day outcomes have not worsened post-IPO removal.

Racial Disparities in Outcomes of Total Joint Arthroplasty at a Single Institution: Have We Made Progress?

Background

Health disparities disproportionately affect minority groups across the United States with respect to care access, quality, and outcomes. The aim of this study is to examine existing disparities between white and African American (AA) patients regarding postoperative outcomes following total joint arthroplasty and provide insight into disparity trends over a 9-year period.

Methods

A retrospective review of 16,779 total joint arthroplasty patients at a single institution between January 2013 and December 2021 was performed. Patients were grouped by race as AA or white. Outcomes of interest included length of stay (LOS), home discharge, 30-day emergency department return, and 30-day readmission. Univariate statistics and multivariate regressions were utilized to analyze results.

Results

Significant improvements in LOS and rates of home discharge occurred for both white and AA patients at our institution over a 9-year period, while rates of 30-day emergency department returns and readmissions demonstrated a downward but non-statistically significant trend. Despite these trends, AA patients continued to experience longer lengths of stay, less likelihood of 0- or 1-day LOS, and higher risk of nonhome discharge for most years examined. However, after controlling for demographic and comorbidity differences, the differences between groups narrowed over time resulting in no significant differences in the aforementioned 3 measures by 2021.

Conclusions

Although racial disparities in outcomes are still apparent, over time, the differences in resource utilization between AA and white patients have narrowed. Initiatives aimed at creating healthier communities with increased access to care and the ultimate goal of equitable care must continue to be pursued.

Comparison of Aseptic Partial- and Full-Component Revision Total Knee Arthroplasty

BACKGROUND

Revision total knee arthroplasty (rTKA) can be performed with isolated tibial, isolated femoral, and combined tibial and femoral component exchange for different indications. Replacement of only 1 fixed component in rTKA leads to shorter operative times and decreased complexity. We sought to compare functional outcomes and rates of rerevision in patients undergoing partial and full rTKA.

METHODS

This retrospective study examined all aseptic rTKA patients with a minimum follow-up of 2 years in a single center between September 2011 and December 2019. Patients were divided into two groups: full rTKA (F-rTKA) if both components (femoral and tibial) were revised and partial rTKA (P-rTKA) if only 1 component was revised. A total of 293 patients (P-rTKA = 76, F-rTKA = 217) were included.

RESULTS

P-rTKA patients had significantly shorter surgical time (109 ± 37 Versus. 141 ± 44 minutes, P < .001). At mean follow-up of 4.2 (range 2.2-6.2) years, rerevision rates did not significantly differ between groups (11.8 Versus. 16.1%, P = .358). Improvements in postoperative Visual Analogue Scale (VAS) pain and Knee Injury and Osteoarthritis Scale (KOOS), Joint Replacement scores were similar as well (P = .100 and P = .140, respectively). For patients undergoing rTKA due to aseptic loosening, freedom from rerevision due to aseptic loosening was similar between groups (100 Versus. 97.8%, P = .321). For patients undergoing rTKA due to instability, freedom from rerevision due to instability did not significantly differ as well (100 Versus. 98.1%, P = .683). In the P-rTKA cohort, freedom from all-cause and aseptic revision of preserved components was 96.1% and 98.7% at the 2-year follow-up.

CONCLUSION

Compared to F-rTKA, P-rTKA yielded similar functional outcomes and implant survivorship with shorter surgical time. When indications and component compatibility allow for such a procedure, surgeons can expect good outcomes when performing P-rTKA.

Trends of obesity rates between primary total hip arthroplasty patients and the general population from 2013 to 2020

Background

The prevalence of obesity in total hip arthroplasty (THA) patients has been studied in the past. However, there has not been direct comparison against obesity in the general population. This study compared yearly trends in BMI and obesity rates between patients who had undergone primary THA and those from the general patient population.

Methods

We retrospectively reviewed all patients over the age of 18 who underwent primary, elective THA and those who had an annual routine physical exam between January 2013 and December 2020 at our academic tertiary medical center. Baseline demographics were controlled in our statistical models. Significance of yearly trends was determined through a linear regression analysis. Independent samples t-test and Chi-square test were used to compare means and proportions between the two groups, respectively.

Results

A total of 11,250 primary THA patients and 1,039,918 annual physical exam patients were included. Average BMI for the THA group was significantly higher (P < 0.001) each year compared to the annual physicals group (APG). Higher obesity rates were observed in all obesity subgroups (all classes, and class I–III individually) for THA patients each year compared to the APG. Interestingly, while we found a significantly increasing trend in obesity for the general population (P < 0.001), BMI and obesity rates remained stable in the THA population.

Conclusion

While our general patient population showed significant increase in BMI and obesity over time, THA patients had higher, yet stable, BMI. Further investigation is required to determine the role of risk optimization in these findings.

Level III Evidence

Retrospective Cohort Study.

Extensive Preoperative Work Is Required for Revision Hip and Knee Arthroplasty

BACKGROUND

Determining the clinical effort associated with preparing for revision total hip and knee arthroplasty is necessary to maintain the appropriate work relative value unit rating. We have investigated the work done by the orthopedic surgical team in the days and weeks prior to revision hip and knee arthroplasty using a count of time by team members in the electronic medical record (EMR).

METHODS

EMR audit logs were generated, and preoperative work (POW) was calculated for members of the surgical team for 200 sequential revision cases. Independent samples t-tests were conducted to compare total POW for procedure, age, gender, insurance, and health literacy; significance threshold was set at P = .05.

RESULTS

POW was 97.7 minutes (standard deviation [SD] 53.1). Surgeon POW accounted for 10.5 minutes (SD 9.3), nurses for 29.9 minutes (SD 34.2), mid-level providers for 22.1 minutes (SD 17.0), and office technicians for 34.1 minutes (SD 35.2). There was no difference in total POW based on procedure (hip vs knee), age, gender, insurance type, or health literacy.

CONCLUSION

Revision arthroplasty requires substantial preoperative preparation from the surgical team. Most of this is by nurses, mid-level providers, and office staff. This does not seem to be different for hip or knee revisions or by age and gender. EMR audit logs capture the bare minimum POW required to prepare a patient for revision arthroplasty.

Emergency Department Visits After Total Joint Arthroplasty for Concern for Deep Vein Thromboses

BACKGROUND

Concern for deep vein thrombosis (DVT) is the most common reason for emergency department (ED) referral after total joint arthroplasty (TJA) at our institution. We aim to investigate the referral pathway, together with the cost and outcomes associated with patients who access an ED because of concern for DVT after TJA.

METHODS

We reviewed a consecutive series of all primary hip and knee arthroplasty patients who accessed the ED for concern for DVT within 90 days of surgery over a one-year period. The referral source and costs associated with the ED visit were collected. A propensity-matched control cohort (n = 252) that was not referred to the ED for DVT was used to compare patient-reported outcomes measures.

RESULTS

In 2018, 108/10,445 primary TJA patients (1.0%) accessed the ED for concern about DVT. The most common reason for accessing the ED was self-referral (69, 64%), followed by orthopaedic on-call referral (21, 19%). Only 15 patients (14%) were found to have ultrasonography evidence of DVT. The mean cost for accessing the ED for DVT for patients with public insurance was $834 (range $394-$2,877). When compared with the control cohort, patients who accessed the ED for DVT had significantly lower postoperative functionality scores (52.5 versus 65.9, P < 0.001).

DISCUSSION

At our institution, 1% of patients who undergo primary TJA accessed the ED for concern for DVT at substantial cost, with only a small portion testing positive for DVT. Self-referral is by far the most common pathway. Additional investigations will be aimed at determining better pathways for DVT work-up, while ensuring appropriate management.

Team Approach: Virtual Care in the Management of Orthopaedic Patients

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Telemedicine and remote care administered through technology are among the fastest growing sectors in health care. The utilization and implementation of virtual-care technologies have further been accelerated with the recent COVID-19 pandemic.

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Remote, technology-based patient care is not a "one-size-fits-all" solution for all medical and surgical conditions, as each condition presents unique hurdles, and no true consensus exists regarding the efficacy of telemedicine across surgical fields.

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When implementing virtual care in orthopaedics, as with standard in-person care, it is important to have a well-defined team structure with a deliberate team selection process. As always, a team with a shared vision for the care they provide as well as a supportive and incentivized environment are integral for the success of the virtual-care mechanism.

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Future studies should assess the impact of primarily virtual, integrated, and multidisciplinary team-based approaches and systems of care on patient outcomes, health-care expenditure, and patient satisfaction in the orthopaedic population.

Electronic Medical Record Audit Time Logs as a Measure of Preoperative Work Before Total Joint Arthroplasty

BACKGROUND

In order to achieve rapid recovery total joint arthroplasty, surgeons and their teams are spending more time in the weeks before surgery to prepare patients. This study aims to quantify total knee and hip prearthroplasty work using retrospective electronic medical record (EMR) activity audit log analysis.

METHODS

EMR activity in 100 elective knee and 100 elective hip arthroplasty cases was performed using audit logs. Each mouse click and action in the EMR was recorded. The time between mouse clicks was calculated and summed for each member of the clinical team. Descriptive statistics and independent samples t-tests were conducted to quantify and compare total preoperative work (POW) between groups defined by gender, procedure, age, insurance type, or health literacy (P < .05).

RESULTS

The mean number of days defined in the prearthroplasty time period was 69.1 days (standard deviation [SD] 42.8; range 8-191). The mean time spent in each patient's chart in the prearthroplasty period was 76.8 (SD 47.8) minutes. Surgeon's work in the medical record accounted for 7.9 (SD 7.9) minutes, registered nurses 46.7 minutes (SD 39.1), physician extenders 10.8 minutes (SD 16.9), and licensed practical nurses and patient care technicians 9.8 minutes (SD 13.0). A significant difference was observed when groups were dichotomized based on age <65 and insurance provider type.

CONCLUSION

A considerable amount of POW is required to prepare patients for surgery from the clinic date one decides to pursue total joint arthroplasty and the day prior to surgery. Retrospective electronic time stamps from the EMR should represent the minimum time required for surgical preparation.

Topical Vancomycin Powder and Dilute Povidone-Iodine Lavage Reduce the Rate of Early Periprosthetic Joint Infection After Primary Total Knee Arthroplasty

BACKGROUND

Vancomycin powder and dilute povidone-iodine lavage (VIP) was introduced to reduce the incidence of periprosthetic joint infection (PJI) in high-risk total knee arthroplasty (TKA) patients. We hypothesize that VIP can reduce the incidence of early PJI in all primary TKA patients, regardless of preoperative risk.

METHODS

An infection database of primary TKAs performed before a VIP protocol was implemented (January 2012-December 2013), during a time when only high-risk TKAs received VIP (January 2014-December 2015), and when all TKAs received VIP (January 2016-September 2019) at an urban, university-affiliated, not-for-profit orthopedic hospital was retrospectively reviewed to identify patients with PJI. Criteria used for diagnosis of PJI were the National Healthcare Safety Network and Musculoskeletal Infection Society guidelines.

RESULTS

VIP reduced early primary TKA PJI incidence in both the high-risk and all-risk cohorts compared with the pre-VIP cohort by 44.6% and 56.4%, respectively (1.01% vs 0.56% vs 0.44%, P = .0088). In addition, after introducing VIP to all-risk TKA patients, compared with high-risk TKA patients, the relative risk of PJI dropped an additional 21.4%, but this finding did not reach statistical significance (0.56% vs 0.44%, P = .4212). There were no demographic differences between the 3 VIP PJI cohorts.

CONCLUSION

VIP is associated with a reduced early PJI incidence after primary TKA, regardless of preoperative risk. With the literature supporting its safety and cost-effectiveness, VIP is a value-based intervention, but given the nature of this historical cohort study, a multicenter randomized controlled trial is underway to definitively confirm its efficacy.

Complication rates of bilateral total hip versus unilateral total hip arthroplasty are similar

Objective

Utilize a nationwide database to identify and compare the differences between patient demographics and clinical outcomes for patients undergoing simultaneous bilateral total hip arthroplasty (THA) and unilateral THA.

Methods

A nationwide administrative claims database was utilized; In-hospital, 90-day, and 1-year post-discharge rates of local and systemic complications were collected and compared with multivariate logistic regression.

Results

Incidence of prosthetic joint infection was significantly lower in the bilateral cohort. Length of stay was significantly shorter in the unilateral THA cohort.

Conclusion

Surgeons should consider simultaneous bilateral THA a safe and effective procedure for low risk patients with appropriate comorbidities.

Surgeons' Preoperative Work Burden Has Increased Before Total Joint Arthroplasty: A Survey of AAHKS Members

BACKGROUND

Implementation of rapid recovery protocols and value-based programs in total joint arthroplasty (TJA) has required changes in preoperative management, such as optimization, education, and coordination. This study aimed to quantify the work burden associated with preoperative TJA care.

METHODS

Two web-based surveys were distributed to surgeon members of the American Association of Hip and Knee Surgeons. The first questionnaire (265 respondents) consisted of questions related to preoperative patient care in TJA and the associated work burden by orthopedic surgeons and their financially dependent health care providers. The second survey (561 respondents) consisted of questions related to relative change in preoperative patient care work burden since 2013.

RESULTS

Greater than 98% of survey respondents reported providing some level of preoperative medical optimization to their patients. The mean amount of reported time spent by the surgeon and/or a qualified health care provider in preoperative activities not included in work captured in current procedural terminology or hospital billing codes was 153 minutes. The mean amount of reported time spent by ancillary clinical staff in preoperative activities was 177 minutes. Most surgeons reported an increase in work burden for total knee (86%) and total hip (87%) arthroplasty since 2013, with a large portion reporting a 20% or greater increase in work (knee 66%, hip 64%).

CONCLUSION

To provide quality arthroplasty care with marked reductions in complication rates, lengths of stay, and readmissions, members of the American Association of Hip and Knee Surgeons report a substantial preoperative work burden that is not included in current coding metrics. Policy makers should account for this time in coding models to continue to promote pathway improvements.

Quantifying the Perioperative Work Associated With Total Hip and Knee Arthroplasty: The Burden Has Increased With Contemporary Care Pathways

BACKGROUND

Recently, the Centers for Medicare and Medicaid Services (CMS) has labeled the procedural codes for total hip arthroplasty (THA) and total knee arthroplasty (TKA) as potentially misvalued and has asked the American Medical Association (AMA) and its Relative Value Scale Update Committee (RUC) to review this. To assess the validity of this claim, we aimed to catalog the specific service tasks and duration of time required for each task associated with the perioperative care of the patient who underwent primary THA and TKA.

METHODS

We prospectively timed preservice and immediate postservice activities performed outside of the operating room (OR) by 7 arthroplasty surgeons over a four-week period. Specific timing data for preservice activities performed in the OR were obtained retrospectively from our institutional electronic medical record for 500 patients undergoing THA and 500 undergoing TKA. Results were compared with the current approved values reviewed by the RUC in 2013 and converted to work relative value units (wRVUs) based on the intensity coefficients used by the RUC.

RESULTS

The average total preservice evaluation time was 42.2 minutes. The average time from the patient entering the OR to incision was 40.8 ± 25.4 minute. Immediate postservice tasks took 30.0 minutes. Compared with the 2013 RUC weighted wRVU value of 1.394 for preservice and 0.560 for immediate postservice activities, we found that surgeons actually perform 1.567 wRVUs of preservice and 0.672 of immediate postservice activities.

CONCLUSION

Policymakers should consider these findings when reviewing the time and intensity spent on perioperative care for patients undergoing THA and TKA.