Publications by authors named "Ali Rahnama-Vaghef"

In the setting of ankle trauma, surgical management of syndesmosis injury involves screw fixation and suture button technique. The efficacy of flexible (suture button) versus rigid (screw) fixation in the management of syndesmotic injury has been investigated extensively in current literature. There is sparse data comparing these two techniques across different body mass indices (BMI).

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Currently, there is no consensus on surgical approach for posterior malleolar fracture fragments with significant posteromedial involvement. The Bartonicek type III/Haraguchi type II posterior malleolar morphologies typically involve large posteromedial fragments, behaving like a pilon injury and have been reported as pilon variant fractures. We performed a retrospective chart review at 2 large healthcare institutions, evaluating patients that underwent surgical management of pilon variant posterior malleolar fractures and determining clinical outcomes including: time to union, union rates, soft tissue complications, infection and time to weight bearing.

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Article Synopsis
  • Posterior malleolar fractures are part of complex ankle injuries, and this study analyzes the relationship between measurements from lateral ankle X-rays and axial CT scans for predicting fracture types.
  • A multi-center analysis of 279 patients identified a strong correlation between the height of the lateral fracture and the likelihood of medial extension fractures, particularly with taller measurements.
  • The findings suggest that higher lateral heights (over 24.5mm) indicate an increased probability of medial extension fractures, recommending more use of CT scans pre-surgery and consideration of specific surgical approaches for these cases.
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The management guidelines of gunshot wound (GSW) injuries to the lower extremities have primarily been described more recently in the literature. A navicular fracture with adjacent joint involvement is presented from a GSW with initial external fixation management to prevent loss of anatomical alignment and successful staged definitive treatment with internal fixation. Based on previous experiences with rearfoot joint involvement from GSW injuries, we were able to direct definitive treatment with arthrodesis of violated joints.

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The aims of this study were to optimize the experimental conditions for labeling extracellularly oriented, solvent-exposed cysteine residues of γ-aminobutyric acid transporter 1 (GAT1) with the membrane-impermeant sulfhydryl reagent [2-(trimethylammonium)ethyl]methanethiosulfonate (MTSET) and to characterize the functional and pharmacological consequences of labeling on transporter steady-state and presteady-state kinetic properties. We expressed human GAT1 in Xenopus laevis oocytes and used radiotracer and electrophysiological methods to assay transporter function before and after sulfhydryl modification with MTSET. In the presence of NaCl, transporter exposure to MTSET (1-2.

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We expressed the gamma-aminobutyric acid (GABA) transporter GAT1 (SLC6A1) in Xenopus laevis oocytes and performed GABA uptake experiments under voltage clamp at different membrane potentials as well as in the presence of the specific GAT1 inhibitors SKF-89976A and NO-711. In the absence of the inhibitors, GAT1 mediated the inward translocation of 2 net positive charges across the plasma membrane for every GABA molecule transported into the cell. This 2:1 charge flux/GABA flux ratio was the same over a wide range of membrane potentials from -110 mV to +10 mV.

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