Shimada (hairstyle) Shimada (hairstyle) The shimada (島田) is a women's hairstyle in Japan, similar to a chignon. Its modern usage is mainly limited to geisha (wearing it as a wig), but during the Edo period it was also worn by ordinary women, and especially by girls in their late teens. Generally the hair is gathered together at the crown of the head and a small portion of the bun is sectioned off to point outward. There are four major types of the Shimada: These hairstyles developed in the Edo period, when the preference among women for long, flowing hairstyles gave way to
BUN-to-creatinine ratio BUN-to-creatinine ratio In medicine, the BUN-to-creatinine ratio is the ratio of two serum laboratory values, the blood urea nitrogen (BUN) (mg/dL) and serum creatinine (Cr) (mg/dL). Outside the United States, particularly in Canada and Europe, the truncated term urea is used (though it is still the same blood chemical) and the units are different (mmol/L). The units of creatinine are also different (μmol/L), and this value is termed the urea-to-creatinine ratio. The ratio may be used to determine the cause of acute kidney injury or dehydration. The principle behind this ratio is the fact that both urea (BUN) and creatinine