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A dental orthosis, designed to increase the size of the upper airway by advancing the mandible, was used in 68 patients to treat snoring and varying degrees of obstructive sleep apnea. The orthosis increased the posterior airway space, as assessed by lateral cephalograms. Seven months (range 2 to 25) after beginning use, 75 percent of patients were using(More)
Blood loss is an important aspect of any major surgery. With increased experience and increasing use of noncemented prostheses, there are indications that the total blood loss is higher in noncemented than in similar cemented arthroplasties. This report is a retrospective study of blood loss comparing cemented and non-cemented cases. In a total of 30 total(More)
Burst fractures of the atlas are usually diagnosed and treated as four-part fractures as described by Jefferson in 1920. Review of the literature, roentgenogram, computed axial tomography (CAT) scans, and laboratory studies, indicates that the burst fracture is usually, if not always, a two-part fracture. These findings are contrary to the accepted concept(More)
An inactivated vaccine for the prevention of feline viral rhinotracheitis (FVR), caliciviral disease, and panleukopenia has been developed. The efficacy of this vaccine for protection against FVR and caliciviral disease was assessed by vaccination of 41 cats and challenge of immunity with rrither FVR virus or feline calicivirus (FCV), strain 225. All(More)
The morbidity and mortality of 11 femoral neck fractures were analyzed to compare operative and conservative management of femoral neck fractures in dialysis patients. All fractures occurred in older men with severe cardiac, pulmonary, gastro-intestinal, and neurologic conditions and with advanced renal osteodystrophy. Six of the seven operated patients(More)
Software bugs contribute to the cost of ownership for consumers in a software-driven society and can potentially lead to devastating failures. Software testing, including functional testing and structural testing, remains a common method for uncovering faults and assessing dependability of software systems. To enhance testing effectiveness, the developed(More)
  • Mark Hays
  • Aviation, space, and environmental medicine
  • 1977
Physician passengers on airlines are frequently called to assist the flight crew if an emergency medical situation arises. There have been numerous studies and reports pertaining to medical emergencies inflight, the various aspects of crew responsibility and reaction, and the types of emergency medical supplies available. This paper is to present the(More)