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.
2-line stanzas. A 2-line stanza is called a couplet. aa is a rhymed couplet; xx an unrhymed couplet. The French call rhymed couplets rimes plates or rimes suivies. 3-line stanzas. A 3-line stanza of any kind is called a tercet. aaa is a triplet. axa is pretty common, occurring in forms such as the villanelle and terza rima (where in both cases there are also rhymes between stanzas). The haiku is a species of tercet, and so are some varieties of englyn (though not the one featured on this site).