Ischemic ATN occurs when the tubular cells do not get enough oxygen, a condition that they are highly sensitive and susceptible to, due to their very high metabolism. Diagnosis. Acute tubular necrosis is classified as a renal (i.e. not pre-renal or post-renal) cause of acute kidney injury. Diagnosis is made by a FENa (fractional excretion of sodium) > 3% and presence of muddy casts (a type of granular cast) in urinalysis.
A Rhyming Couplet is two line of the same length that rhyme and complete one thought. There is no limit to the length of the lines. Rhyming words are words that sound the same when spoken, they don't necessarily have to be spelt the same.
The couplet is a popular poetic device. A couplet contains two lines of verse that usually rhyme, though this isn't required. The lines can be any length and use any rhythm. Sometimes the two lines are the same length, and sometimes one is longer than the other. Couplets are often used to end a stanza, but they can also constitute the whole poem.