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K+ (potassium, serum potassium, lytes)
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KUB (abdominal X-rays, abdominal film)
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karyotyping (chromosome analysis)
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kidney function tests ([hyperLink linkTitle="creatinine" id="1160" pub="1" type="medenc"]creatinine[/hyperLink], [hyperLink linkTitle="creatinine-urine" id="1159" pub="1" type="medenc"]creatinine-urine[/hyperLink], [hyperLink linkTitle="creatinine clearance" id="1161" pub="1" type="medenc"]creatinine clearance[/hyperLink], [hyperLink linkTitle="BUN" id="1101" pub="1" type="medenc"]BUN[/hyperLink])
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kidney removal (nephrectomy)
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kidney transplant (renal transplant, transplantation of the kidney)
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knee arthroscopy (diagnostic knee arthroscopy, arthroscopic knee exploration)
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knee joint replacement (total knee replacement, TKR, total knee arthroplasty, total knee joint replacement)