Publications by authors named "Sam Keshen"

Case: A 67-year-old female patient presented for total knee arthroplasty (TKA) 4 years after receiving an antegrade femoral nail for bisphosphonate-induced femur fracture. She underwent a single-stage procedure with retention of femoral hardware. The femoral nail was used as a surrogate guide to reference the anatomical axis of the femur to position the distal femoral cutting block with good results.

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Study Design: A case report. It is important to achieve optimal sagittal balance in spinal deformity surgery by matching LL to PI. A Lumbar osteotomy to increase lordosis is often the method used to achieve this in adult patients.

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Study Design: A retrospective study.

Objectives: Intraoperative skull-skeletal traction (ISST) facilitates the surgical scoliosis correction, but it is also associated with neurological risk. The objective of the present study was to investigate the impact of various traction weights on neurophysiological change and curve correction in surgery for adolescent idiopathic scoliosis (AIS).

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Study Design: Cross-sectional, pre-post patient survey.

Objective: The aim of this study was to determine what factors affect a patient's decision to undergo elective surgery following a surgical consultation.

Summary Of Background Data: The surgical consultation is an important step in selecting and preparing patients for elective surgery.

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Article Synopsis
  • The study analyzed the accuracy of iliac screws placed using a freehand technique by the same surgeon, focusing on how screw breaches correlated with clinical symptoms leading to revision surgeries.
  • Out of 193 iliac screws examined, 169 were correctly placed, while 24 were misplaced, with breaches classified based on the severity of screw extrusion and their violation of iliac walls.
  • Only 12.4% of screws experienced breaches, with 2.1% being symptomatic enough to require revision surgery; breaches longer than 2 cm, especially in the lateral or inferior walls, posed significant risks.
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This study aimed to show that a more distal insertion of S2-alar-iliac screws (S2AI) towards the S2 foramen facilitates a more natural trajectory and results in fewer breaches of the iliac wing due to the anteroposterior relationship of the sacrum and pelvis. Thirty-six consecutive patients who had received S2AI and postoperative computed tomography (CT) imaging were retrospectively reviewed. A freehand technique was used to insert all screws.

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Objective: Despite mandatory helmets and face masks, professional and amateur goaltenders continue to be at risk for eye and facial injuries. Better understanding of the mechanism of injury would help in optimizing goaltender equipment. The goal of this study was to identify eye and orbital injuries to goaltenders in the National Hockey League (NHL) over the past 5 seasons.

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Study Design: A retrospective case-control study.

Objectives: To determine factors influencing the ability to achieve coronal balance following spinal deformity surgery.

Methods: Following institutional ethics approval, the radiographs of 47 patients treated for spinal deformity surgery with long fusions to the pelvis, were retrospectively reviewed.

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Purpose: To determine the incidence of pseudarthrosis at the osteotomy site after three-column spinal osteotomies (3-COs) with posterior column reconstruction.

Methods: 82 consecutive adult 3-COs (66 patients) with a minimum of 2-year follow-up were retrospectively reviewed. All cases underwent posterior 3-COs with two-rod constructs.

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Study Design: Retrospective case series.

Objective: To compare the early results of posterior column (PCO) and three-column (3CO) osteotomies performed in patients with previously fused idiopathic scoliosis and review their abilities to achieve coronal correction of residual deformities.

Summary Of Background Data: Residual deformity of previously fused AIS can accelerate adjacent segment degeneration secondary to lowest instrumented vertebra (LIV) tilt and rotation.

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Study Design: Retrospective review and analysis of lateral long cassette radiographs.

Objective: The purpose of this paper is to assess whether certain radiographic features routinely seen on lumbar radiographs can predict a structural thoracic deformity.

Summary Of Background Data: Obtaining proper sagittal alignment is an essential factor contributing to favorable clinical outcomes following spinal deformity surgery.

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Study Design: A retrospective analysis.

Objective: The purpose of this study was to determine whether the deformity angular ratio (DAR) can reliably assess the neurological risks of patients undergoing deformity correction.

Summary Of Background Data: Identifying high-risk patients and procedures can help ensure that appropriate measures are taken to minimize neurological complications during spinal deformity corrections.

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Objective: To review and expose the occurrences of tension pneumothorax as a result of pleural tear during posterior spinal surgery.

Methods: Intraoperative reports were retrospectively reviewed for 2 patients who underwent posterior spinal fusion and experienced pleural tear and subsequent tension pneumothorax. Surgical decisions for recognition and treatment were also reviewed.

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Study Design: Retrospective analysis.

Objective: To demonstrate the effectiveness of hook-rod constructs in closing thoracic osteotomies safely and effectively.

Summary Of Background Data: The outcomes of hook-rod instrumentation in osteotomies for the correction of kyphosis at the lumbar region of the spine have been described.

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Study Design: Case report.

Objective: To surgically regain shoulder balance in patients with adolescent idiopathic scoliosis after loss of alignment after posterior fusion for Lenke II deformity correction.

Summary Of Background Data: Shoulder balance is known to have a large effect on patient satisfaction after deformity correction.

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