Publications by authors named "Kamil Amer"

Objectives: In the treatment of closed intertrochanteric fractures, the two most common treatment options are intramedullary medullary nail (IMN) and dynamic hip screw (DHS), yet the best treatment method remains controversial. The purpose of this study is to determine the difference in mortality and morbidity between IMN and DHS. Secondarily, this study determines which pre-operative risk factors affect rates of morbidity and mortality.

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Objectives: Identification of modifiable comorbid conditions in the preoperative period is important in optimizing outcomes. We evaluate the association between such risk factors and postoperative outcomes after upper extremity surgery using a national database.

Methods: The National Surgical Quality Improvement Program (NSQIP) 2006-2016 database was used to identify patients undergoing an upper extremity principle surgical procedure using CPT codes.

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Posterior interosseous nerve (PIN) injury is an uncommon yet debilitating complication following distal bicep tendon repair. There are case reports of acute intraoperative PIN injury related to retractor placement, drill trajectory, and nerve incarceration. We report three cases of delayed PIN neuropathy in the setting of a loose cortical button.

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There has been increasing pressure on healthcare providers to exhibit restraint when prescribing opioids for pain control. However, data that characterizes the differences between orthopaedic providers and their accompanying prescription rates is not well developed. This study accessed Medicare Provider Utilization and Payment Data from 2015 to collect the number of prescriptions for opioid-based medications administered by orthopaedic surgeons across the country.

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Article Synopsis
  • Intertrochanteric hip fractures are common and can lead to complications from surgical treatments, prompting a comparison between sliding hip screw fixation (SHS) and cephalomedullary nailing (CMN).
  • The study reviewed 17 articles, including data from over 3,300 patients, to investigate various complications such as nonunion, infection, and refracture rates.
  • Results indicated that SHS has significantly lower rates of refractures and reoperations compared to CMN, but no major differences were found in other complication rates, suggesting the need for further research as surgical techniques evolve.*
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Aim: This study aims to investigate demographic data, survival rates, and the relationship of these rates with surgery in a large case series including multiple myeloma (MM) patients.

Method: MM cases were analyzed retrospectively using the latest version of the SEER database published in April 2020. This version covers January 1975 to December 2017.

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Background: The scapholunate interosseous ligament (SLIL) is an important contributor to wrist stability and functionality. SLIL injury is debilitating and therefore many surgical techniques have been proposed, but the optimal treatment modality remains debated.This meta-analysis reviews the available literature comparing surgical techniques used in the treatment of chronic SLIL to determine the best approach.

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Purpose: The purpose of this study was to evaluate implant survivorship and clinical outcomes following radial head arthroplasty for fracture at long-term follow-ups.

Methods: A retrospective analysis was conducted on adult patients who underwent primary uncemented radial head arthroplasty for radial head or neck fractures between 2012 and 2015. Medical records were reviewed to collect information regarding demographics, injury characteristics, reoperations, and revisions requiring implant removal.

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Background: The anatomy of the hand makes it uniquely sensitive to complications after bacterial infection. The causative organism has been implicated as a predictor of complications after surgery. We hypothesize that bacterial etiology is associated with different operation and reoperation rates in patients with flexor tenosynovitis.

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Background: Operative management of carpal tunnel syndrome (CTS) involves release of the transverse carpal ligament (TCL) and often the volar antebrachial fascia (VAF). Evidence of a difference between TCL and TCL+VAF release is limited. We conducted a pilot study to measure changes of intraoperative nerve conduction velocity (NCV) after CTS surgery and compared outcomes of variable degrees of decompression.

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Background: The two techniques most utilized in the surgical treatment of humeral shaft fractures are open reduction internal fixation (ORIF) and intramedullary nailing (IMN). Although there have been multiple comparative clinical studies comparing outcomes for these two treatments, studies have not suggested one approach to be superior to the other. The purpose of this study is to perform a systematic literature review and meta-analysis of studies that evaluated the treatment of humeral shaft fractures with either ORIF or intramedullary nail.

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Background: Tumors of the hand are encountered frequently and represent a variety of pathologic diagnoses, both benign and malignant. Even within a single pathologic type, presentation can vary. This study reviews hand tumors encountered by an individual surgeon and described presenting features to better aid in clinical decision making.

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Background: Treatment of metastatic lesions to the humerus is dependent on patient's pain, lesion size and location, and post-operative functional goals. Surgical options include plate or nail fixation [open reduction internal fixation (ORIF)], or endoprosthetic replacement (EPR), with cement augmentation. The objective of this study was to perform a single institution retrospective analysis of outcomes by method of reconstruction, tumor volume, and pathologic diagnosis.

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Background: Clavicle fractures are frequently associated with trauma to regions beyond the immediate zone of injury. In order to provide surgeons with information on injury prevalence to prevent delays in diagnosis and management, we describe the epidemiology of concomitant injuries in patients with clavicle fractures and identify differences between those with open and closed fractures. Methods:The Nationwide Inpatient Sample (NIS) 2001-2013 database was queried for adult patients discharged with a diagnosis of a clavicle fracture using ICD-9 codes.

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Purpose: Hand infections are a common source of potentially debilitating morbidity, particularly in patients with comorbid disease. We hypothesize that there is a difference in predictive value between two commonly used comorbidity indices for the prognosis of hand infections, which may have clinical implications in the management of these conditions.

Methods: The Nationwide Inpatient Sample 2001-2013 database was queried for hand infections using International Classification of Diseases, Ninth Revision codes.

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Purpose: Frailty is a well-known predictor of adverse postoperative outcomes and is often considered in the preoperative planning stage of surgery. In recent years, the modified frailty index (mFI), a novel metric used to quantify frailty, has become increasingly used in the orthopedic literature as a risk assessment tool. In this study, we analyze the utility of the mFI in predicting unplanned repeat operations and morbidity in the surgical treatment forearm fractures.

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Background: Frailty is an important predictor of surgical outcomes and has been quantified by several models. The modified frailty index (mFI) has recently been adapted from an 11-item index to a 5-item index and has promise to be a valuable risk assessment tool in orthopedic trauma patients. We perform a retrospective analysis of the 5-item mFI and evaluate its effectiveness in predicting outcomes in patients with long bone fractures.

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Purpose: Liposarcoma (LPS) is a one of the most commonly diagnosed soft tissue sarcomas. Little is known about the epidemiology and prognosis of each subtype. We present an analysis of epidemiology and survival of the subtypes of LPS using a national database.

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Purpose: Venous thromboembolism (VTE) is a potentially life-threatening condition associated with both orthopaedic surgery and tumour growth. In this study, we identify risk factors associated with VTE in patients with musculoskeletal tumours using two national datasets.

Methods: The ACS-NSQIP and NIS databases were queried for patients undergoing surgery with a diagnosis of benign or malignant musculoskeletal tumours.

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Background: Synovial sarcoma (SyS) is a rare malignancy that is typically located on the limbs and occurs predominantly in adolescents. A study in a large population for SyS comparing subtypes has not yet been reported.

Methods: National Cancer Institute's Surveillance, Epidemiology, and End Results database was queried for patients diagnosed with SyS between January 1975 and December 2016.

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Objective: Adamantinomas are rare low-grade malignant bone tumors. This study aims to describe the demographic characteristics and survival rates of patients suffering from adamantinomas.

Methods: The National Institute of Cancer Surveillance, Epidemiology, and Recent Results (SEER) database was used, and patients diagnosed with adamantinoma between 1973 and 2016 were screened.

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Ganglion cysts are among the most common benign soft tissue masses. Although surgery has been shown to be effective, ∼12% to 42% of cases with long-term follow-up have been reported to recur. The purpose of this study was to determine the impact of the topical application of mitomycin C used as an adjuvant to surgery on recurrence rate of ganglion cysts.

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Background: Scapholunate advanced collapse (SLAC) of the wrist is one of the most common patterns of degenerative arthritis in the wrist. Surgical intervention is warranted for individuals with symptomatic SLAC and degenerative disease that affects the radioscaphoid joint. The most popular options for motion-preserving reconstruction and treatment of this disease include 4-corner arthrodesis and proximal row carpectomy.

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Objectives: Middle third clavicle fractures have long been managed conservatively with immobilization. Some patients, especially those with completely displaced or shortened clavicle fractures are now thought to have increased risk of nonunion or symptomatic malunion. The authors performed a meta-analysis to study the incidence of nonunion and symptomatic malunion and test the hypothesis that surgical fixation of these fractures significantly lowers the risk of these complications.

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Background: Most closed clavicle fractures are treated nonoperatively. Research during the past decade has reported differences in the treatment of clavicle fractures based on insurance status in the US and may highlight unmet needs in a vulnerable population, particularly because new data show that surgery may lead to improved outcomes in select populations. Large-scale, national data are needed to better inform this debate.

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