Publications by authors named "Andrew Bi"

Partial-thickness rotator cuff tears (PTRCTs) are a common source of shoulder pathology, both in the aging population and in younger overhead athletes. Advanced imaging modalities used currently have led to increases in recognition, diagnosis, and treatment of these tears. The anatomy, five-layer histology, and relationship to the Ellman classification of PTRCTs have been well studied, with recent interest in radiographic predictors, such as the critical shoulder angle and acromial index.

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In all aspects of orthopaedic surgery, restoring native patient anatomy has shown improved outcomes in comparison to nonanatomic reconstructions. Particular attention has been paid to the hip capsule, as the complex of the iliofemoral, pubofemoral, and ischiofemoral ligaments, as well as the zona orbicularis and iliocapsularis, all play an essential role in hip stability, mechanics, and maintenance of intra-articular pressures. An anatomic approach toward hip arthroscopy also includes labral repair or reconstruction with preservation of the chondrolabral junction and cam resection.

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Eponyms are widely used in the field of orthopedic surgery, including for surgical instruments. Although their use is at times controversial, an appreciation of the history behind eponymous terms allows one to both recognize the shortcomings of the past and simultaneously be inspired by ingenious inventors. The primary purpose of this review is to provide a historical perspective of clamps and forceps commonly used in orthopedic surgery, to better appreciate the evolution of their use over time, and to inspire innovation to constantly improve upon surgical instrumentation as the field of orthopedic surgery advances.

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Article Synopsis
  • The study aims to assess if Hounsfield units (HU) from CT scans can predict postoperative complications in patients with proximal humerus fractures.
  • Sixty-six patients were analyzed, measuring deltoid tuberosity index (DTI) and HU values to compare those with and without complications following surgical fixation.
  • The results showed that lower DTI and HU were linked to higher complication rates, with increased DTI and HU correlating to a reduced risk of issues like osteonecrosis and implant failure.
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In well-indicated patients, meniscal allograft transplantation (MAT) survivorship can approach 80% to 90% at 10 years and 50% to 60% at 15 years, although these studies have included mostly younger patients (mean ages 25-30 years). Evidence-based indications for MAT are symptomatic meniscal deficiency in the absence of uncorrected osteoarthritis and malalignment in the young, active patient. The definition of young and active continues to evolve as demands of an aging population grow, and MAT has been performed with favorable outcomes in those over 40 and even 50 years old.

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Introduction: Open clavicle fractures are rare, and there are no current reported cases in the literature of a missed open clavicle with resultant fracture-related infection and osteomyelitis.

Case Report: We present a 65-year-old female with no reported medical history, who presented to our institution with left clavicular pain and wound drainage 8 days after she was struck by a motor vehicle in her home country of Guyana. She was found to have a missed open clavicle fracture with an associated severe infection.

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Purpose: The purpose of this study is to assess the association between sagittal tibial tuberosity-trochlear groove (sTT-TG) distance and patellofemoral chondral lesion size in patients undergoing cartilage restoration procedures.

Methods: A retrospective cohort analysis of patients who underwent an osteochondral allograft transplantation or matrix-induced autologous chondrocyte implantation in the patellofemoral compartment, from 2010 to 2020, were included if they had patellofemoral high-grade lesions, magnetic resonance imaging (MRI) and minimum 2-year follow-up. The preoperative sTT-TG distance was measured independently on axial T2-weighted MRI sequences by two authors, each at least two weeks apart.

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» Partial-thickness rotator cuff tears (PTRCTs) are a common pathology with a likely high asymptomatic incidence rate, particularly in the overhead athlete.» The anatomy, 5-layer histology, and relationship to Ellman's classification of PTRCTs have been well studied, with recent interest in radiographic predictors such as the critical shoulder angle and acromial index.» Depending on the definition of tear progression, rates of PTRCT progression range from 4% to 44% and appear related to symptomatology and work/activity level.

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Purpose: To analyze the effects of 1 or more patient-reported allergies on clinical outcomes, in particular graft failure rate, and patient-reported outcomes (PROs) following osteochondral allograft transplantation (OCA) of the knee.

Methods: Retrospective review of patients who underwent knee OCA from August 2010 to May 2021 with a minimum of 2-year follow-up. Patients were initially divided into 2 cohorts: those with at least 1 allergy and those without any allergies.

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Article Synopsis
  • - SLAP tears are a major source of shoulder pain for athletes who frequently use overhead motions, and in-office nano-arthroscopy can effectively diagnose and treat these injuries.
  • - This technique offers several benefits, including faster recovery times for patients, lower healthcare costs, and higher levels of patient satisfaction compared to traditional methods.
  • - The report outlines how to perform in-office nano-arthroscopy for SLAP tears, focusing on key factors like local anesthesia, proper patient selection, and ensuring good visualization during the procedure.
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  • Elbow ulnar collateral ligament (UCL) reconstruction (UCLR) is the preferred surgery for UCL tears, with a growing interest in UCL repairs; the study looks at trends in these surgeries and factors affecting complications.
  • The research analyzed data from New York State healthcare facilities from 2010-2019, comparing surgical outcomes based on demographic information, socioeconomic factors, and the volume of surgical procedures at different centers.
  • Results indicated a higher frequency of UCLR compared to UCL repairs; patients undergoing repairs tended to be older and female, while high-volume centers had younger male patients and were associated with fewer complications.
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Background: Spinopelvic parameters, including pelvic tilt (PT), sacral slope (SS), and pelvic incidence, have been developed to characterize the relationship between lumbar spine and hip motion, but a paucity of literature is available characterizing differences in spinopelvic parameters among patients with femoroacetabular impingement syndrome (FAIS) versus patients without FAIS, as well as the effect of these parameters on outcomes of arthroscopic treatment of FAIS.

Purpose: To (1) identify differences in spinopelvic parameters between patients with FAIS versus controls without FAIS; (2) identify associations between spinopelvic parameters and preoperative patient-reported outcomes (PROs); and (3) identify differences in PROs between patients with stiff spines (standing-sitting ΔSS ≤10°) versus those without.

Study Design: Cohort study; Level of evidence, 2.

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Background: Revision surgery following isolated anterior cruciate ligament reconstruction (ACLR) has often focused on mid- to long-term revisions due to re-rupture, while short-term 30-day revision is a rare, but underappreciated entity. This study aims to characterize incidence and risk factors for reoperations following isolated ACLR.

Methods: This is a retrospective case-control analysis of the American College of Surgeons National Surgical Quality Improvement Program Database (NSQIP) database from 2005 to 2017.

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A 42-year-old male with no past medical history presented to an emergency room with increasing pain and swelling of his left lower extremity over 48 hours with no preceding trauma. A computed tomography scan demonstrated a hematoma (20 cm × 4 cm × 10 cm) present within the gastrocnemius-soleus complex. Acute compartment syndrome (ACS) was diagnosed clinically, confirmed intraoperatively with an arterial line transducer, and treated with emergent fasciotomy.

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Article Synopsis
  • Gluteus medius and minimus tears are increasingly recognized as a significant cause of lateral hip pain, now understood as a treatable condition linked to greater trochanteric pain syndrome.
  • Treatment options for these tears include both nonoperative methods and surgical interventions; when surgery is necessary, techniques like repair, reconstruction, or tendon transfer can be performed, with good outcomes reported.
  • Current evidence supports both open and endoscopic repair methods, but more research is essential to identify the best surgical practices and factors affecting recovery.
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Purpose: The purpose of this study was to investigate the incidence and anatomic distribution of meniscus injury in patients who have sustained acute ACL injuries with and without concomitant Segond fracture. We hypothesized that patients who have sustained a torn ACL with a concomitant Segond fracture would have a higher incidence of lateral meniscal injuries than patients with an isolated ACL injury.

Methods: Patients who underwent ACL reconstruction from 2012 to 2022 were retrospectively reviewed.

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The gold standard for surgical treatment of anterior cruciate ligament (ACL) injuries is reconstruction. There are a variety of graft options, from autograft to allograft, using bone-patellar tendon-bone (BTB), hamstrings, quadriceps, or Achilles, and, in the case of a multiligamentous knee injury (MLKI), allograft may be preferred to decrease operative time and graft harvest morbidity. The BioBrace (ConMed, New Haven, CT) is a bioinductive collagen scaffold designed to provide an environment for soft tissue remodeling with time zero biomechanical support and can be used to augment graft reconstructions in the case of concerns for allograft strength, healing, or width.

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An important domain of artificial intelligence is deep learning, which comprises computed vision tasks used for recognizing complex patterns in orthopaedic imaging, thus automating the identification of pathology. Purported benefits include an expedited clinical workflow; improved performance and consistency in diagnostic tasks; decreased time allocation burden; augmentation of diagnostic performance, decreased inter-reader discrepancies in measurements and diagnosis as a function of reducing subjectivity in the setting of differences in imaging quality, resolution, penetrance, or orientation; and the ability to function autonomously without rest (unlike human observers). Detection may include the presence or absence of an entity or identification of a specific landmark.

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Article Synopsis
  • Massive irreparable rotator cuff tears (MIRCTs) pose a treatment challenge, especially for younger patients without previous joint issues.
  • This study employed a network meta-analysis of comparative studies conducted from 2017 to 2022 to evaluate various surgical treatments for MIRCTs in patients under 70, focusing on patient-reported outcomes and mobility metrics.
  • Results from 23 studies (1178 patients) indicated better outcomes for InSpace balloon arthroplasty and arthroscopic bridging grafts in terms of shoulder function and pain relief compared to other surgical options.
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Biceps tendinopathy is a common cause of chronic anterior shoulder pain characterized by altered joint mechanics with considerable deficits in range of motion secondary to pain. The benefits of in-office nano-arthroscopy (IONA) include the ability to diagnosis and treat biceps tendinopathy, quicker patient recovery, reduced cost, and improved patient satisfaction. The purpose of this technical report is to describe the technique for performing IONA for biceps tendinopathy (biceps tenotomy/biceps tenodesis), with special consideration for obtaining adequate local anesthesia, proper indications, adequate visualization, and the advantages of performing these procedures in the office rather than the operating room.

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Article Synopsis
  • * In-office needle arthroscopy (IONA) is a method for diagnosing and treating these injuries in a cost-effective manner, leading to faster recovery and higher patient satisfaction.
  • * This technical report outlines the IONA technique, focusing on local anesthesia, when to use it, ensuring good visibility during the procedure, and the benefits of conducting it in a clinical setting instead of an operating room.
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The lateral patellofemoral joint, composed of multiple soft-tissue structures, balances the knee by aiding patella tracking, stability, and force distribution. Arthroscopic lateral release is a well-described procedure that addresses patellofemoral knee pain and, in cases with patellar instability, may be combined with medial stabilization. In-office needle arthroscopy is an up-trending technique that simultaneously diagnoses and treats patellofemoral pathology in the office, leading to a quicker patient recovery, reduced cost, and improved patient satisfaction.

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Background: Several risk factors have been identified for the development of postoperative shoulder stiffness, and there has been increasing interest in orthopedic literature regarding patient-reported allergy (PRA) as an identifiable risk factor for adverse outcomes. The purpose of this study is to determine whether PRAs are associated with subsequent rates of diagnosis of adhesive capsulitis (AC) or return to the operating room for postoperative shoulder stiffness within 2 years after arthroscopic rotator cuff repair (ARCR).

Methods: Current Procedural Terminology surgical billing codes were used to retrospectively identify patients who underwent ARCR at a single urban academic institution from January 2012 to December 2020 with minimum 2-year follow-up.

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