|Values are valid only on day of printing.|
Nephelometry. Immunonephelometry quantitates the alpha-1-antitrypsin (A1A) contained in a 24-hour stool collection. From the concentration of stool A1A and serum A1A, a 24-hour clearance is calculated. In the absence of a serum specimen and/or a timed stool collection, an A1A stool concentration will be reported.(Instruction manual: Siemens Nephelometer II Siemens, Inc., Newark, DE)
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