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Computed tomographic pulmonary angiography (CTPA) is increasingly being used as first investigation for suspected pulmonary embolism (PE). The investigation has high predictive value, but is resource and time intensive and exposes patients to considerable radiation. Our aim was to assess the potential value of a negative d-dimer assay to exclude pulmonary(More)
OBJECTIVE To determine if differences in respiratory muscle strength could explain any posture related effects on oxygenation in convalescent neonates. METHODS Infants were examined in three postures: supine, supine with head up tilt of 45 degrees, and prone. A subsequent study was performed to determine the influence of head position in the supine(More)
Two previous studies have suggested that a single occipitomental (OM) 15 degrees radiograph may be sufficient for screening for midfacial fractures in the Accident and Emergency (A&E) department, but the study had insufficient power to detect whether some fractures might be missed with only one projection. We undertook to determine whether there is a(More)
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