Radon: what should physicians know?
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Biomedical subjects
Publications and source records attributed to R B Birrer.
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Despite major changes in the epidemiology, microbiology, and prognosis over the last 50 years, the diagnosis of infective endocarditis is still difficult, and serious complications including death are not uncommon. Prosthetic and right-sided valvular infections are more common and require longer periods of vigorous antimicrobial therapy than in the past. An effective short-course antibiotic regimen has been designed for sensitive microorganisms, and protocols have been established for culture-negative cases (15 percent) and empiric situations. Finally, cardiac surgery should be considered as an important modality, especially in cases of congestive heart failure.
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Exercise can be prescribed for many patients depending on the type, frequency, duration, and intensity of the activity. The patient's interests and goals must be balanced with the fitness profile. For maximum benefit, exercise should be performed regularly--three times per week on an every-other-day basis, with each training session lasting 35 to 45 minutes. Contraindications to exercise depend on the type of activity and the health status of the participant.
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Home monitoring of blood glucose is an important new tool in the management of patients with diabetes mellitus. Current monitoring techniques are safe, reliable and reproducible, and they enable diabetics to participate in their own care. There are no contraindications to home glucose monitoring, but some consideration must be given to cost and maintenance. The physician can evaluate the effectiveness of home monitoring by determining the glycosylated hemoglobin level.
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A knowledge of anatomy, coupled with an awareness of biomechanical factors such as shoes, hosiery and other environmental agents, provides sufficient expertise for treating the majority of foot ailments. Simple, easily constructed devices alleviate common problems such as corns, calluses and bursitis secondary to athletic activity. The podiatric manifestations of diabetes and peripheral vascular disease are effectively managed by regular foot care from the family physician.
Americans are traveling abroad in increasing numbers. The family physician should review the traveling patient's immunization records and inform him of the risks and hazards of world travel, with particular emphasis on malaria chemoprophylaxis, water decontamination, personal hygiene and accident prevention. A post-trip evaluation is important to assure that any diseases acquired on tour have been adequately treated.
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Ophthalmoscopy performed during a routine eye checkup on a 22-year-old black man revealed multiple intraretinal, cyst-like lesions scattered throughout the macular and extramacular areas in both eyes. Based on clinical findings, morphologic appearance, and an abnormal electro--oculogram, the diagnosis of multifocal Best's macular dystrophy was made. Hemoglobin electrophoresis showed an AS pattern confirming the presence of sickle cell trait. This is the first case of the coexistence of these two genetically transmitted diseases, Best's disease and sickle cell trait.
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