Richard Ma

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The annual incidence of traumatic spinal cord injury worldwide is estimated to be 35 patients per million. Nonmissile penetrating spinal injuries most commonly occur in the thoracic region, and the majority has neurologic deficits on admission. The management of patients who lack neurologic deficits is controversial due to the risk of neurologic status(More)
Acromioclavicular joint injuries are among the most common shoulder girdle injuries in athletes and most commonly result from a direct force to the acromion with the arm in an adducted position. Acromioclavicular joint injuries often present with associated injuries to the glenohumeral joint, including an increased incidence of superior labrum anterior(More)
ä Most major U.S. professional sports and the National Collegiate Athletic Association (NCAA) have adopted concussion policies. Current National Football League and NCAA guidelines do not permit an athlete with a concussion to return to play on the same day as the injury. No adolescent or high-school athletes with a concussion should be allowed to return to(More)
Delayed post-traumatic osteonecrosis, also known by its eponym Kummell's disease, is a rarely reported clinical entity that likely occurs with higher frequency than recognized. We highlight a case of a 75-year-old female household ambulator who presented with significant thoracolumbar pain and delayed T12 collapse after a ground-level fall. The patient had(More)
BACKGROUND Few studies have considered hormonal influences, particularly vitamin D, on healing. HYPOTHESIS Vitamin D deficiency would have a negative effect on the structure of the healing tendon-bone interface in a rat model and would result in decreased tendon attachment strength. STUDY DESIGN Controlled laboratory study. METHODS Vitamin D(More)
develops fact-based strategic insights for senior executives around critical public and private sector issues. This executive brief is based on an in-depth study by the Institute's research team. It is part of an ongoing commitment by IBM Global Business Services to provide analysis and viewpoints that help companies realize business value. You may contact(More)
OBJECTIVES Chlamydia trachomatis is a common sexually transmitted infection with serious consequences if not treated. Chlamydia screening pilots in England have established feasibility in primary care but there are currently no examples of good practice in general practice. The objectives of the study were to understand issues of using general practice as a(More)