Stability of Common Analytes in Urine Refrigerated for 24 h before Automated Analysis by Test Strips

Central outpatient laboratories might find processing large numbers of urinary samples that arrive in the late afternoon inconvenient and refrigerate them overnight before testing. Furthermore, in certain settings clinics might have difficulty assuring that the urine arrives at the laboratory during...

Full description

Saved in:
Bibliographic Details
Published in:Clinical chemistry (Baltimore, Md.) Md.), 2000-09, Vol.46 (9), p.1384-1386
Main Authors: Froom, Paul, Bieganiec, Barbara, Ehrenrich, Zahava, Barak, Mira
Format: Article
Language:English
Subjects:
Autoanalysis
Biological and medical sciences
Carboxylic Ester Hydrolases - analysis
Drug Stability
Endocrinology
Erythrocytes - cytology
False Negative Reactions
False Positive Reactions
Glucose - analysis
Humans
Investigative techniques, diagnostic techniques (general aspects)
Leukocytes - cytology
Medical sciences
Pathology. Cytology. Biochemistry. Spectrometry. Miscellaneous investigative techniques
Proteins - analysis
Proteinuria - urine
Specimen Handling
Time Factors
Urinalysis - methods
Urinary system
Urine - cytology
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Central outpatient laboratories might find processing large numbers of urinary samples that arrive in the late afternoon inconvenient and refrigerate them overnight before testing. Furthermore, in certain settings clinics might have difficulty assuring that the urine arrives at the laboratory during the same day as the collection. Because the stability of urine samples for delayed automated dipstick analysis (Supertron) is unknown, after defining precision, we retested urines refrigerated for 24 h to determine stability. Urinalysis was done twice on the same day and repeated after the sample was refrigerated for 24 h. Combur-10S (Roche Diagnostics) dipsticks were read automatically by a Supertron analyzer. Repeat tests on the same day were compared with tests after storage. Leukocyte esterase had high precision, but after storage approximately 25% of the positive samples were less reactive (P:
ISSN:0009-9147
1530-8561
DOI:10.1093/clinchem/46.9.1384