Hubert A. Benzon

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BACKGROUND Piriformis syndrome can be caused by anatomic abnormalities. The treatments of piriformis syndrome include the injection of steroid into the piriformis muscle and near the area of the sciatic nerve. These techniques use either fluoroscopy and muscle electromyography to identify the piriformis muscle or a nerve stimulator to stimulate the sciatic(More)
BACKGROUND Central nervous system injuries after transforaminal epidural steroid injections have been ascribed to occlusion of the blood vessels supplying the spinal cord and brain by the particulate steroid. METHODS The authors compared the sizes of the particles of the steroids methylprednisolone acetate, triamcinolone acetonide, dexamethasone sodium(More)
BACKGROUND Factor VII is the most affected clotting factor during the early phase of warfarin therapy. An international normalized ratio (INR) of more than 1.4 is considered unsafe for epidural catheter placement or removal, according to the American Society of Regional Anesthesia and Pain Medicine. The authors tested the hypothesis that factor VII(More)
BACKGROUND Guidelines recommend discontinuation of clopidogrel for 7 days before a neuraxial injection, while other directives suggest that 5 days might be adequate. We examined the time course of antiplatelet activity after clopidogrel discontinuation in patients undergoing epidural injections. METHODS Thirteen patients were studied at baseline, 3, 5,(More)
OBJECTIVE Nerve stimulator-assisted localization of the femoral nerve is well described; however, direct ultrasound imaging of the femoral nerve branches may be challenging. The purpose of this study was to correlate the evoked motor responses obtained by femoral nerve stimulation and the topographic orientation of the femoral nerve branches during(More)
OBJECTIVES Our study surveyed physician members of 3 American pain societies to determine prescription patterns and whether these practices reflect current expert opinion. METHODS We sent 3 mailings to 2938 physicians from January 2010 to January 2011. The questionnaire contained 49 questions on topics related to opioids, antidepressants, anticonvulsants,(More)
INTRODUCTION In this prospective randomized study, we compared a single-injection modified intertendinous (n = 55) with the classic posterior (n = 54) popliteal sciatic nerve block for patients undergoing ankle/foot surgery. METHODS Nerve stimulator-guided blocks were performed 7-8 cm (classic posterior) or 12-14 cm (modified intertendinous) above the(More)
BACKGROUND Several studies have investigated the selection process for medical students, residents, and fellows across different specialties. Currently, the selection criteria used by pediatric anesthesia program directors to select prospective pediatric anesthesia fellows are unknown. OBJECTIVE To evaluate the criteria used by program directors in the(More)
Traumatic brain injury (TBI) is a significant contributor to death and disability in children. Considering the prevalence of pediatric TBI, it is important for the clinician to be aware of evidence-based recommendations for the care of these patients. The first edition of the Guidelines for the Acute Medical Management of Severe Traumatic Brain Injury in(More)