Publications by authors named "Anthony Karzon"

Article Synopsis
  • Total elbow arthroplasty (TEA) is an important surgical procedure for various elbow conditions, including osteoarthritis and rheumatoid arthritis, but there's limited research on usage trends.
  • A study analyzed TEA cases in the U.S. from 2010 to 2018 using health database queries, categorizing patients by their specific conditions and examining trends related to sex, age, and location.
  • Results showed a significant overall decline in TEA procedures, dropping from 694 to 466 cases annually, with the largest decrease seen in cases for rheumatoid arthritis, while cases for osteoarthritis showed the smallest reduction.
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Article Synopsis
  • - The text outlines a research study that includes sections on background information, methods used for the study, results obtained, and the conclusion drawn from the findings.
  • - The background section likely provides context and rationale for the study, while the methods section explains how the research was conducted.
  • - The results section presents the key findings, and the conclusion summarizes the implications or significance of these results, emphasizing the level of evidence provided by the research.*
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Background: Severe posterior glenoid bone loss with glenohumeral osteoarthritis with an intact rotator cuff can be managed with reverse shoulder arthroplasty but requires lateralization and version correction to avoid potential complications, such as instability, notching and implant failure. Angled bone grafting with humeral head autograft can provide durable glenoid bone stock, but results have been mixed. The purpose of this study was to evaluate patient-reported and objective outcomes as well as complication and failure rates for patients who underwent angled humeral head autografting for severe retroversion.

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Article Synopsis
  • This study analyzed changes in the incidence and patient demographics of lateral ankle ligament repair (LALR) for chronic ankle instability from 2009 to 2019 using the IBM Watson Health MarketScan Database.
  • The research found a significant 76.6% increase in annual incidence rates of LALR, going from 3.46 to 6.11 cases per 100,000 population, with a projected 61.5% increase in annual procedure volumes by 2032.
  • Notably, the largest rise in incidence was among patients over 70 years old, suggesting that older individuals are becoming more active and may seek out elective surgeries to maintain their activity levels, highlighting a need for further research on surgical considerations
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Background: Lumbar disc herniation (LDH) is a common condition that can be characterized with disabling pain. While most patients recover without surgery, some still require operative intervention. The epidemiology and trends of laminotomy for LDH have not been recently studied, and current practice patterns might be different from historical norms.

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Background: Perioperative corticosteroids have shown potential as nonopioid analgesic adjuncts for various orthopedic pathologies, but there is a lack of research on their use in the postoperative setting after total shoulder arthroplasty (TSA). The purpose of this study was to assess the effect of a methylprednisolone taper on a multimodal pain regimen after TSA.

Methods: This study was a randomized controlled trial (clinicaltrials.

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Background: Upper extremity (UE) fractures are a common reason for emergency department (ED) visits, but recent data on their epidemiology are lacking. This study aimed to describe the incidence, demographics, patient characteristics, and associated health care factors of UE fractures, hypothesizing that they would remain prevalent in the ED setting.

Methods: Using the Nationwide ED Sample database, patients presenting to the ED with UE fractures in 2016 were identified, and population estimates were used to calculate incidence rates.

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Background: With an aging global population, the incidence of revision total hip arthroplasty (rTHA) is expected to increase markedly. While patients undergoing primary total hip arthroplasty who require chronic anticoagulation (AC) have been associated with increased postoperative complications, less is known about the impact of chronic AC status on postoperative complications in the rTHA setting. This study sought to compare complication rates following aseptic rTHA between patients who were on chronic AC and those who were not.

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Background: Prior studies have demonstrated reduced periprosthetic joint infection (PJI) rates following extended oral antibiotics (EOAs) for high-risk patients undergoing primary total joint arthroplasty (TJA). This study compared 3-month PJI rates in all patients undergoing primary or aseptic revision TJA with or without EOA prophylaxis.

Methods: In total, 2,982 consecutive primary (n = 2,677) and aseptic revision (n = 305) TJAs were performed by a single, fellowship-trained arthroplasty surgeon from 2016 to 2022 were retrospectively reviewed.

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Article Synopsis
  • * Identifying the cause of shoulder issues, such as muscle paralysis or overactivity, requires specific diagnostic strategies and imaging techniques.
  • * A thorough physical examination is essential for accurately diagnosing and treating scapular problems, especially in patients with conditions like Ehlers-Danlos syndrome.
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A comprehensive review of scapular pathologies and their effect on shoulder function is necessary to determine the best treatment options. The coordinated motion between the scapulothoracic and glenohumeral joints is essential for shoulder motion and depends on the balanced activity of the periscapular muscles. Disruption in these muscles can cause abnormal scapular motion and compensatory glenohumeral movements, leading to misdiagnosis or delayed diagnosis.

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Purpose: The purpose of this study was to analyze the trends in the annual volume and incidence of proximal row carpectomy (PRC), four-corner fusion (4CF), total wrist arthrodesis (TWF), and total wrist arthroplasty (TWA) from 2009 to 2019 in the United States.

Methods: The IBM Watson Health MarketScan databases were queried to identify annual case volumes for PRC, 4CF, TWF, and TWA from 2009 to 2019. The annual incidence of these procedures was then calculated based on the population estimates from the US Census Bureau.

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Background: With increasing numbers of revision total hip and total knee arthroplasties (rTHAs and rTKAs), understanding trends in related out-of-pocket (OOP) costs, overall costs, and provider reimbursements is critical to improve patient access to care.

Methods: A large database was used to identify 92,116 patients who underwent rTHA or rTKA between 2009 and 2018. The OOP costs associated with the surgery and related inpatient care were calculated as the sum of copayment, coinsurance, and deductible payments.

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Case: A 62-year-old woman presented with wrist pain secondary to a distal radius fracture malunion 4 months after a fall onto an outstretched hand. She was not an ideal candidate for osteotomy and bone graft because of the degree of displacement and osteoporosis, so after nonoperative treatment was unsuccessful, she was offered total wrist arthroplasty (TWA) or arthrodesis and opted for TWA.

Conclusion: At 14-month follow-up, the patient reported significant improvement in her pain and function.

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Article Synopsis
  • Thoracic outlet syndrome (TOS) is primarily a neurogenic condition caused by compression in the supraclavicular and infraclavicular fossae, linked to issues like repetitive overhead activities and scapular dyskinesia.
  • This condition involves muscle contractures that narrow key anatomical spaces, leading to brachial plexus compression and specific syndromes like pectoralis minor syndrome when symptoms are localized to the infraclavicular area.
  • Diagnosis requires a thorough history, physical examination, and imaging; most patients respond well to nonsurgical treatments, but surgery is an option for those who don’t improve, with techniques evolving towards less invasive endoscopic procedures.
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Purpose: Opioid pain medication is most commonly prescribed after distal radius fracture fixation, and there is high variability in the quantity and duration prescribed. Comorbidities, including substance use and depression, have been associated with higher consumption habits, and increased sizes of postoperative opioid prescriptions have been previously linked to an increasing risk of chronic opioid use and opioid use disorder. The purpose of this study was to investigate opioid prescription patterns after distal radius fracture fixation and identify patient-specific risk factors associated with increased opioid prescription refills.

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Case: A 74-year-old male patient presenting with chronic radiating shoulder pain, paresthesias, and weakness had previously undergone reverse shoulder arthroplasty and anterior cervical discectomy and fusion for an irreparable cuff tear and cervical radiculopathy, respectively. After being diagnosed with neurogenic thoracic outlet syndrome and undergoing physiotherapy, the patient's recalcitrant condition was surgically managed with arthroscopic pectoralis minor tenotomy, suprascapular nerve release, and brachial plexus neurolysis.

Conclusion: This ultimately led to complete pain relief and improved function.

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Background: Proximal humerus fractures are the third most common fracture type for patients between the ages of 65 and 89 and occur more frequently in women than men. Given the variety of surgical treatments for proximal humerus fractures, the aim of this study was to (1) report United States national volume and incidence estimates for surgical management of proximal humerus fractures to better understand the changing practice over the past decade and (2) to analyze differences in volume and incidence among age groups, sex, and geographic region.

Methods: Using IBM Marketscan national database, all patients that underwent open reduction internal fixation (ORIF), hemiarthroplasty, or reverse total shoulder arthroplasty (RTSA) between 2010 and 2019 were identified with Current Procedural Terminology codes.

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Hypothesis: The purpose of this study was to analyze the SHR of patients diagnosed with small (SRCTs) and massive rotator cuff tears (MRCTs), adhesive capsulitis (AC), and glenohumeral osteoarthritis (GH-OA) and compare their measurements to those of patient controls with healthy shoulders using DDR. We hypothesize that various diagnoses will vary with regards to SHR.

Methods: The sequences of pulsed radiographs collated in DDR to create a moving image were prospectively analyzed during humeral abduction in normal controls and in 4 distinct shoulder pathology groups: SRCT, MRCT, AC, and GH-OA.

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Dupuytren disease is associated with benign fibroproliferative changes to the palmar fascia of the hand sometimes resulting in progressive contractures of the fingers. The earliest descriptions of these contractures date back to the 18th century. Much has been learned about the condition since the clawing condition was first described; however, optimal treatment still poses significant challenges to modern-day surgeons.

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Neurogenic thoracic outlet syndrome is a challenging condition to diagnose and treat, often precipitated by the triad of repetitive overhead activity, pectoralis minor contracture, and scapular dyskinesia. The resultant protracted scapular posture creates gradual repetitive traction injury of the suprascapular nerve via tethering at the suprascapular notch and decreases the volume of the brachial plexus cords and axillary vessels in the retropectoralis minor space. A stepwise and exhaustive diagnostic protocol is essential to exclude alternate pathologies and confirm the diagnosis of this dynamic pathologic process.

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Background:  Restoring elbow function is challenging after late presenting brachial plexus birth injury (BPBI). Free functioning muscle transplantation (FFMT) using the gracilis muscle is a reliable procedure to restore elbow flexion in patients with impaired function after spontaneous recovery or failed surgical reconstruction.

Methods:  A retrospective review was performed on BPBI patients more than 2 years of age who received a FFMT between January 1993 and January 2018, with the aim of improving elbow flexion as the primary or secondary functional goal.

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Background: Ankle arthrodesis has been the mainstay treatment for end-stage ankle arthritis. The popularity of total ankle arthroplasty (TAA) has been on the rise due to improved implant design and postoperative outcomes. The purpose of this study was to describe the basic epidemiology and trends of annual procedure volumes and incidence in the general American population as well as in different population subgroups from 2009 to 2019.

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