Publications by authors named "Mary K Richardson"

Introduction: Identifying risk factors for pulmonary embolism (PE) and deep vein thrombosis (DVT) following primary total knee arthroplasty (TKA) may improve risk stratification and guide surgeons in prophylaxis selection. This study aimed to identify factors associated with postoperative venous thromboembolism (VTE) following TKA.

Methods: A national healthcare database was queried for adults who underwent primary, elective TKA from January 1, 2015 to December 31, 2020.

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Background: Patients with Medicaid insurance are at an increased risk of postoperative complications following total knee arthroplasty and total hip arthroplasty (TJA); however, their outcomes following revision TJA for periprosthetic joint infection (PJI) requires further study.

Methods: A retrospective query was conducted for adult patients undergoing implant explantation and antibiotic spacer placement for TJA PJI from the Premier Healthcare Database between December 1, 2016, and December 31, 2021. Patients were then grouped by Medicaid or non-Medicaid insurance status and were age matched through exact caliper matching.

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Article Synopsis
  • This study investigates the rates of venous thromboembolism (VTE) among patients undergoing surgery for cancer-related bone fractures while receiving different anticoagulants: enoxaparin, apixaban, rivaroxaban, or aspirin (ASA).
  • Analysis was conducted using patient data from the Premier Healthcare Database between 2015 and 2021, comparing VTE occurrences among the different medication cohorts, with enoxaparin as the control.
  • Results indicated that enoxaparin was associated with lower VTE rates compared to apixaban but higher than those treated with ASA, suggesting that ASA may be a safer option for certain patients with minimal risk factors for VTE post-surgery.
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  • This study investigates the safety and effectiveness of aspirin compared to enoxaparin for preventing blood clots in high-risk patients undergoing total joint surgeries, specifically total knee and hip arthroplasties.
  • Analyzing data from surgeries performed between 2015 and 2021, the researchers compared patients with a history of venous thromboembolism (VTE) who were given either aspirin or enoxaparin after their surgeries.
  • The findings suggest that patients on aspirin had similar rates of serious complications like pulmonary embolism and deep vein thrombosis as those on enoxaparin but experienced fewer bleeding-related issues and complications overall.
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Background: Tranexamic acid (TXA) is increasingly utilized in total shoulder arthroplasty (TSA) to minimize blood loss. Despite its benefits, concerns persist regarding its use in patients at elevated risk of postoperative venous thromboembolism (VTE). This study evaluates trends in TXA use and assesses its safety in both general and high-risk patient populations.

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Background: Total shoulder arthroplasty (TSA), which includes anatomic total shoulder arthroplasty (aTSA) and reverse total shoulder arthroplasty (rTSA), is a technically demanding procedure and limited data exist on the relationship between case volume and complications. We sought to identify volume thresholds for TSA, aTSA, and rTSA at which risk of a major surgical complication decreased and to compare complications of patients treated by high-volume surgeons with those of patients treated by low-volume surgeons.

Materials And Methods: Primary, elective TSAs (aTSA and rTSA) from January 1, 2016, to December 31, 2019, were identified in the Premier Healthcare Database.

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Background: Privatized Medicare Advantage (MA) plans are an alternative to traditional Medicare (TM). We sought to identify differences in 90-day postoperative mortality and nonfatal adverse events between TM and MA patients undergoing stage 1 antibiotic spacer placement for periprosthetic joint infection (PJI) of the hip or knee.

Methods: A nationally representative database was queried from 2015 to 2021 for adult patients undergoing stage 1 antibiotic spacer placement for PJI.

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Article Synopsis
  • - The study aimed to investigate the relationship between standing lumbar lordosis (LL) and lateral decubitus LL among 49 subjects, excluding those with existing spinal issues.
  • - Results showed that participants lost an average of 11.9° of LL when moving from a standing to a lateral decubitus position, with a strong correlation between standing LL and lateral decubitus LL (R = 0.725).
  • - Findings suggest that the loss of LL in different positions may impact surgical outcomes, particularly in procedures that involve positioning patients laterally.
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Background: Two-stage exchange arthroplasty remains the gold standard for treating chronic hip periprosthetic joint infections. However, controversy remains regarding the optimal spacer type, particularly among patients with increased dislocation risk. This study reports on the outcomes of articulating hip spacers utilizing a single constrained-liner design.

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Background: The perioperative use of dexamethasone in diabetic patients remains controversial due to concerns related to infection and adverse events. This study aimed to determine whether clinical evidence supports withholding dexamethasone in diabetic patients due to concern for infection risk. We hypothesized that there is no difference in infectious outcomes between dexamethasone-treated patients and controls.

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Introduction: The relationship between surgeon volume and risk of dislocation after total hip arthroplasty (THA) is debated. This study sought to characterize this association and assess patient outcomes using a nationwide patient and surgeon registry.

Methods: The Premier Healthcare Database was queried for adult primary elective THA patients from January 1, 2016, to December 31, 2019.

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Background: Lumbar spinal pathology is known to affect outcomes following total hip arthroplasty (THA). However, the effect of hip osteoarthritis (OA) on outcomes following lumbar fusion has not been well studied. The purpose of this study was to determine the association between hip OA and spinal reoperation following lumbar spinal fusion.

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  • This study looked at the dangers of blood clots (like pulmonary embolism and deep vein thrombosis) after people have hip surgery.
  • Researchers examined a large number of patients from 2015 to 2021 to see who might get these blood clots.
  • They found that older age, being Black, certain health problems, and receiving blood transfusions increased the chances of getting a blood clot, while a specific medicine (dexamethasone) might lower the risk.
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Background: Inpatient total hip arthroplasty (THA) and total knee arthroplasty (TKA) practices were dramatically affected in the United States in 2020 as elective surgeries were paused in response to the COVID-19 pandemic. This study sought to provide an updated estimate of inpatient total joint arthroplasty (TJA) case volumes in the United States in 2020.

Methods: A retrospective cohort study was performed by identifying all adult patients who underwent primary, elective TJA from January 1st, 2017 to December 31st, 2020, using the National Inpatient Sample.

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Background: Robotic-assisted systems have gained popularity in total knee arthroplasty (TKA). The purpose of this study was to evaluate operative characteristics and radiographic outcomes of obese patients undergoing robotic-assisted TKA.

Methods: A retrospective review of consecutive cases performed by a single surgeon was performed from January 1, 2016, to January 31, 2022.

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Background And Objectives: This study aimed to evaluate the postoperative complications associated with administering intravenous (IV) tranexamic acid (TXA) in patients undergoing surgical fixation for neoplastic pathologic fractures of the lower extremities.

Methods: Patients ≥18 years old who underwent surgical intervention for neoplastic pathologic lower extremity fractures from 2015 to 2021 were identified using the Premier Healthcare Database. This cohort was divided by TXA receipt on the index surgery day.

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Background: Postoperative infection is a devastating complication of total joint arthroplasty (TJA). Perioperative use of dexamethasone in patients who have diabetes mellitus (DM) remains controversial due to concern for increased infection risk. This study aimed to evaluate the association between dexamethasone and infection risk among patients who have DM undergoing TJA.

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Background: Inpatient total hip and total knee arthroplasty were substantially impacted by the SARS-CoV-2 (COVID-19) pandemic. We sought to characterize the transition of total joint arthroplasty (TJA) to the outpatient setting in 2 large state health systems during this pandemic.

Methods: Adult patients who underwent primary elective TJA between January 1, 2016 and December 31, 2020 were retrospectively reviewed using the New York Statewide Planning and Research Cooperative System and California Department of Health Care Access and Information datasets.

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Background: Hyperglycemia has been identified as a risk factor for periprosthetic joint infection (PJI) after total hip arthroplasty (THA). However, there is no consensus with regard to the preoperative blood glucose level (BGL) on the day of the surgical procedure associated with increased risk. We sought to identify preoperative BGL thresholds associated with an increased risk of PJI.

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Background: Tranexamic acid (TXA) is increasingly utilized during total knee arthroplasty (TKA) and total hip arthroplasty (THA) to decrease blood loss; however, there are concerns with regard to potential thromboembolic complications, particularly in high-risk patients. This study sought to define a subset of patients at elevated risk for thromboembolic complications following total joint arthroplasty (TJA) and to compare postoperative outcomes between patients who received TXA and those who did not.

Methods: Patients who underwent primary, elective TJA from 2015 to 2021 were identified in the Premier Healthcare Database.

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Article Synopsis
  • Same-day total hip arthroplasty (THA) and total knee arthroplasty (TKA) are increasingly popular in the U.S., especially during the COVID-19 pandemic and after these procedures were removed from the Medicare inpatient only list.
  • A study analyzed data from 2016 to 2020, finding that same-day TKA rose from 1.2% to 62.4% and THA from 2.0% to 54.5%.
  • By December 2020, same-day procedures accounted for over half of all TKA and THA cases in the country, demonstrating a significant shift in surgical trends.
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Background: Extensor mechanism disruption is a challenging complication following total knee arthroplasty. The purpose of this study was to compare outcomes between patients who received mesh versus allograft extensor mechanism reconstruction.

Methods: All patients who underwent extensor mechanism reconstruction at a single institution were screened.

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Article Synopsis
  • This study investigates the link between anemia, red blood cell (RBC) transfusions, and the risk of venous thromboembolism (VTE) in patients who have undergone total knee or hip arthroplasty.
  • It uses a large database of over 1.2 million patients to analyze three groups: those without anemia or transfusion, those with anemia but no transfusion, and those with anemia who received transfusions.
  • Results show that after controlling for various factors, the risk of DVT and PE did not differ significantly between the anemia without transfusion group and the control group.
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