Tonsure a part of the rite of "pabbajja" and also a part of becoming a monk (Skt. "Bhikshu") or nun (Skt. "Bhikshuni"). This involves shaving head and face. This tonsure is renewed as often as required to keep the head cleanly shaven. The purification process of the "metzora" (one afflicted with "tzaraath") involved the ritual shaving on the "metzorah's" entire body except for the afflicted locations. And as the term tonsure may be used as a broad description for such hair styling of devotees as a ritual symbol of their renunciation of worldly fashion and esteem, Orthodox Jewish males do not
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