Publications by authors named "Carson Rider"

Osteoid osteomas are benign bone tumors that are commonly found in the cortical segments of long bone but can occasionally occur in the talus of the foot. They typically present in younger males and are characterized by lesions with a vascularized nidus surrounded by sclerotic bone. Plain radiographs can often miss the diagnosis, requiring further imaging with computed tomography (CT) or magnetic resonance imaging (MRI).

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The optimal management of chronic Achilles tendon injuries continues to be debated. The tension-length relationship and intrinsic viscoelasticity of the native tendon that allows efficient propulsion during ambulation are difficult to restore once the tendon has been injured. Missed or misdiagnosed injuries or failure of surgical or nonsurgical management of acute Achilles tendon ruptures can lead to the tendon healing in an elongated position or lack of healing altogether.

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Background: There is no current consensus on whether to use an open or minimally invasive (MIS) approach for Achilles tendon repair after acute rupture. We hypothesized that patients in both open and MIS groups would have improved patient-reported outcome scores using the PROMIS system postoperatively, but that there would be minimal differences in these scores and complication rates between operative techniques.

Methods: A total of 185 patients who underwent surgery for an acute, unilateral Achilles tendon rupture between January 2016 and June 2019, with minimum 1-year follow-up were included in the cohort studied.

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Background: Mepivacaine spinal anesthetic may facilitate more rapid postoperative recovery in joint arthroplasty than bupivacaine. This study compared recovery, pain, and complications between the 2 anesthetics in anterior-approach total hip arthroplasty (THA) at a free-standing ambulatory surgery center (ASC).

Methods: This retrospective cohort study of 282 consecutive patients with mean age 55.

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The number of total ankle replacements (TARs) performed in the United States has dramatically increased in the past 2 decades due to improvements in implant design and surgical technique. Yet as the prevalence of TAR increases, so does the likelihood of encountering complications and the need for further surgery. Patients with new-onset or persistent pain after TAR should be approached systematically to identify the cause: infection, fracture, loosening/subsidence, cysts/osteolysis, impingement, and nerve injury.

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Background: Postoperative urinary retention (POUR) is among the reasons for delay in discharge after outpatient total hip arthroplasty (THA), occurring in 2%-46% of patients. We hypothesized that the frequency of POUR following outpatient THA in the ambulatory surgery center (ASC) is low compared to previously reported rates and that management can be effective in the perioperative period when it is encountered.

Methods: Three hundred seventy-seven THA patients (409 hips) who had arthroplasties in the ASC over a 5-year period were identified.

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Based on a series of 407 outpatient total hip arthroplasties performed by a single surgeon, a standardized protocol for blood loss management in outpatient arthroplasty was developed consisting of a presurgical hematocrit of greater than 36%, administration of tranexamic acid, prophylactic introduction of albumin, hypotensive epidural anesthesia, monopolar electrocautery, and bipolar sealer. This protocol uses techniques that alone are not novel but together create a standardized and reproducible pathway that when implemented can increase the safety of outpatient hip arthroplasty.

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Introduction: The term "outpatient" has a variety of meanings regarding the location of arthroplasty and the duration of stay postoperatively. The purpose of this systematic review was to evaluate the literature and more accurately define the term "outpatient."

Methods: A PubMed search (2014 to 2019) using the terms "outpatient AND arthroplasty" identified 76 studies; 35 studies that met the inclusion criteria were assessed to determine the definition of "outpatient.

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Background: There are few data comparing the direct anterior approach (DAA) and posterior approach (PA) for total hip arthroplasty (THA) in the outpatient setting. The purpose of this study is to compare 90-day complications between the 2 approaches. We hypothesized that they would be equally safe and effective.

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Case Report: A 65-year-old man presented with pain in his left ankle. After a delay, he presented to the orthopaedic clinic where computed tomography scan revealed an intra-articular, locked-lateral calcaneal fracture with dislocation of the peroneal tendons.

Conclusions: This combination of injuries can produce subtle signs, such as an atypical double-density sign and varus talar tilt, on plain radiographs; however, the consequences of delayed treatment can be catastrophic.

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Case: An immunosuppressed 51-year-old man sustained a ballistic injury about the site of a primary total hip arthroplasty, which had been performed for osteonecrosis of the femoral head 2 years earlier. He was treated with arthroscopic debridement and irrigation, inspection of the implants, and removal of foreign bodies.

Conclusion: Ballistic injury to a hip arthroplasty site with retained foreign bodies is an unusual injury.

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Background: Despite an 88% increase in the number of pediatric fractures treated in ambulatory surgery centers (ASCs) over a 10-year period, few studies have compared outcomes of fracture treatment performed in a freestanding ASC compared with those performed in the hospital (HOSP) or hospital outpatient department (HOPD). The purpose of this study was to compare clinical and radiographic outcomes, treatment times, and costs for treatment of Gartland type II supracondylar humeral (SCH) fracture in the ASC, HOSP, and HOPD.

Methods: Retrospective review identified pediatric patients with isolated Gartland type II SCH fractures who had closed reduction and percutaneous pinning (CRPP) by board-certified orthopaedic surgeons from January 2012 to September 2016.

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Background: Total hip arthroplasty (THA) continues to be one of the most successful surgical procedures in the medical field. However, over the last two decades, the use of modularity and alternative bearings in THA has become routine. Given the known problems associated with hard-on-hard bearing couples, including taper failures with more modular stem designs, local and systemic effects from metal-on-metal bearings, and fractures with ceramic-on-ceramic bearings, it is not known whether in aggregate the survivorship of these implants is better or worse than the metal-on-polyethylene bearings that they sought to replace.

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This case report describes a 54-year-old Hispanic male who developed femoral nerve palsy approximately 1 year after metal-on-metal total hip arthroplasty (MOM THA). Cobalt and chromium levels were 4.8 ppb and undetectable, respectively.

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