Powell Richards

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The aims of this article are to outline the physiology of high altitude, the treatment of altitude illness and to describe opportunities for further education in mountain medicine. Human difficulty with the rarefied air at high altitudes has been recognised since ancient times.Writings attributable to Aristotle (384-322 BC) describe travel on Mount Olympus(More)
The uptake of97Ru-transferrin (Ru-TF) in tumor and abscess bearing animals was compared with67Ga-citrate (Ga),123I-transferrin (I-TF), and several other plasma proteins. Maximal concentration in tumor of Ru-TF in mice was three times higher than67Ga-citrate (16.80±4.20 vs 5.08±0.58% D/g) although it occurred later (24 h compared with67Ga which reached its(More)
Frostbite is a thermal injury that can occur when temperatures drop low enough for tissue to freeze. On rewarming the tissues, an inflammatory process develops which is often associated with tissue loss. The extent of the tissue loss reflects the severity of the cold exposure and includes factors such as temperature, duration, wind chill, altitude, and(More)
One hundred twenty-four patients presented with herpes zoster in a small-town, solo practice between 1983 and 1992. This article reviews the clinical features and natural history of herpes zoster, followed by a description of the cases seen in the study practice. This common disease, easily diagnosed and treated by the family physician, usually responds(More)
Non-freezing cold injury (NFCI) is the Cinderella of thermal injuries and is a clinical syndrome that occurs when tissues are exposed to cold temperatures close to freezing point for sustained periods. NFCI is insidious in onset, often difficult to recognize and problematic to treat, and yet the condition accounts for significant morbidity in both military(More)
The relationship between Achilles tendon ultrasound abnormalities, including a spindle shape and heterogeneous echogenicity, is unclear. This study investigated the relationship between these abnormalities, tendon thickness, Doppler flow and pain. Sixty-one badminton players (122 tendons, 36 men, and 25 women) were recruited. Achilles tendon thickness,(More)
We have studied 223 consecutive patients by R-wave synchronized cardiac imaging using Tc-99m-RBC's labeled by the Brookhaven kit method. Preparation of the Tc-99m-RBC's is simple and can be accomplished in less than 20 min per patient. The average percent RBC labeling was 96.89%. Only 5 of 223 patients (2.2%) had yields less than 95%. Fifty patients were(More)
AIDS is a fatal viral infection transmitted by body fluids, primarily blood, which is becoming more common in the U.K., and if the gloomiest predictions are true will affect millions in the next decade. Most, if not all, of these patients will at stage develop neurological manifestations: therefore the neurosurgeon will find it difficult to avoid close(More)
BACKGROUND Common Variable Immunodeficiency (CVID) is the commonest form of severe antibody deficiency. It is characterized by reduced levels of IgG (<400 mg/dL) and low IgA and/or IgM levels, recurrent bacterial infections, impaired antibody responses despite the presence of B Cells and normal or near normal T immunity in 60% of patients. There is a high(More)