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PURPOSE To compare accelerational forces to the head in high school-level football, hockey, and soccer athletes. METHODS Acceleration of impact was measured within the helmet of high school hockey and football players during actual game play. A triaxial accelerometer was placed at the vertex of the helmet immediately adjacent to the players head. Peak(More)
UNLABELLED Several recent studies suggest that acceleration of the head at impact during sporting activities may have a detrimental effect on cognitive function. Reducing acceleration of impact in these sports could reduce neurologic sequelae. OBJECTIVE To measure the effectiveness of a regulation football helmet to reduce acceleration of impact for both(More)
The objective of this study was to assess if 10 right upper quadrant (RUQ) ultrasound (US) examinations could be used as a minimum standard for training. This was a retrospective review of patients with suspected gallbladder pathology who underwent resident-performed RUQ US before operative or department of radiology evaluation. Two hundred twenty-four(More)
PURPOSE Cognitive deficits observed in professional soccer players may be related to heading of a soccer ball. To assess the severity of a single instance of heading a soccer ball, this study experimentally and theoretically evaluated the linear and angular accelerations experienced by the human head during a frontal heading maneuver. METHODS(More)
Controversy exists concerning the lethality of Tasers. These are conducted electrical weapons which incapacitate subjects by delivering an electrical charge that causes diffuse muscle contraction. In North America, over 440 deaths have been reported immediately following Taser use. Taser International has recently suggested that Tasers should not be aimed(More)
STUDY OBJECTIVE Accurate physical examination of patients with dyspnea is important. Jugular venous distention, however, can be difficult to assess in patients. The purpose of this case series is to serve as a pilot study of how ultrasonographic examination of the internal jugular vein compares with other measures of dyspnea. METHODS This was a case(More)
OBJECTIVES To assess whether 10 focused abdominal sonography for trauma (FAST) examinations could be used as a minimum standard for training, as suggested previously. METHODS This was a retrospective review of patients with abdominal trauma who underwent resident-performed FAST examinations before surgical or Department of Radiology evaluation. RESULTS(More)
OBJECTIVE To rank playground surfaces with respect to impact attenuation under various simulated environmental conditions. DESIGN An accelerometer was dropped from a height of 60 inches onto five different playground surfaces (wood chips, sand, gravel, grass, and commercial rubber mats). Impact attenuation was measured (in G forces) with the above(More)
BACKGROUND A number of high-profile professional football players have suffered career-ending concussions. The purpose of this article is to test the surfaces used by a professional team to determine their impact-attenuating properties. METHODS An accelerometer was dropped from a height of 48 inches onto three different playing fields in the St. Louis(More)
PRIMARY OBJECTIVE To validate a QEEG algorithm on traumatic brain injury in an Emergency Department (ED) setting. METHODS AND PROCEDURES EEG data were collected from 105 patients with head injury (53 CT+ and 52 CT-) and 50 ED controls. Ten minutes of eyes closed resting EEG was collected from five frontal locations. A discriminant index of the probability(More)