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National Health and Nutrition Examination Survey : 2021 laboratory procedures manual
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February 2022
[PDF-9.89 MB]
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Description:The laboratory component of NHANES includes the collection, processing, storage, and shipping of blood and urine specimens. Collectively, these specimens provide data about the health status of the U.S. population.
The blood collection (venipuncture) procedure consists of (1) administering a questionnaire to screen for medical conditions that will exclude the study participant (SP) from the blood draw; (2) determining fasting status; and (3) performing the blood draw. The phlebotomist also collects one additional blood tube from SPs selected for the volatile organic compounds (VOC) special study on consenting SPs aged 12 years and older, and Liver Genetics on SP’s 18 years of age and older. The procedure also includes an additional questionnaire, Pesticide Use Questionnaire (PUQ), as part of the Phlebotomy exam.
The purpose of urine collection and processing is to collect sufficient urine from participants aged 3 years and older to (1) allocate urine into vessels for storage and transport to multiple government and contract laboratories for analysis; and (2) allocate urine into a vessel for future studies.
The purpose of blood processing is to (1) allocate blood (whole blood, plasma, and serum) into vessels for transport to multiple government and contract laboratories for analysis; (2) allocate serum into vessels for future studies; and (3) process serum for environmental testing.
The purpose of performing a CBC on blood specimens is to provide a study of blood cells.
The purpose of urine pregnancy testing is to exclude pregnant women aged 8-59 years from participating in the dual-energy x-ray absorptiometry (DXA), balance, and the liver ultrasound transient elastography (LUTE) sections of the mobile examination center (MEC) exam.
The purpose of conducting the special VOCs study is to collect blood to determine the prevalence of exposures to certain chemicals.
The purpose of collecting the Genetics samples is to use genetic testing in incidences of hepatitis.
2021-Laboratory-Procedures-508.pdf
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Pages in Document:500 pages in various pagings
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