Tonsure always consists of the cutting of four locks of hair in a cruciform pattern: at the front of head as the celebrant says "In the Name of the Father", at the back of head at the words "and the Son", and on either side of the head at the words "and the Holy Spirit". In all cases, the hair is allowed to grow back; the tonsure as such is not adopted as a hairstyle. Baptismal tonsure is performed during the rite of Holy Baptism as a first sacrificial offering by the newly baptized. This tonsure is always performed, whether the
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