False-positive urine dipstick result for proteinuria in a severe case of alkalinuria

2021 ◽  
Author(s):  
Keisuke Yoshida ◽  
Masahiko Yazawa ◽  
Maho Terashita ◽  
Yugo Shibagaki ◽  
Naoto Tominaga
Keyword(s):  
False Positive ◽  
Severe Case ◽  
Urine Dipstick ◽  
Positive Urine

scholarly journals Clinical Value of Dividing False Positive Urine Cytology Findings into Three Categories: Atypical, Indeterminate, and Suspicious of Malignancy

2014 ◽  
Vol 15 (5) ◽  
pp. 2251-2255 ◽  
Author(s):  
Kazumasa Matsumoto ◽  
Masaomi Ikeda ◽  
Takahiro Hirayama ◽  
Morihiro Nishi ◽  
Tetsuo Fujita ◽  
...  
Keyword(s):  
False Positive ◽  
Urine Cytology ◽  
Clinical Value ◽  
Positive Urine

Are False-Positive Urine Markers for the Detection of Bladder Carcinoma Really Wrong or Do They Predict Tumor Recurrence?

2003 ◽  
Vol 43 (2) ◽  
pp. 146-151 ◽  
Author(s):  
Martin G Friedrich ◽  
Angelika Hellstern ◽  
Marieta I Toma ◽  
Peter Hammerer ◽  
Hartwig Huland
Keyword(s):  
Bladder Carcinoma ◽  
False Positive ◽  
Tumor Recurrence ◽  
Positive Urine ◽  
Predict Tumor Recurrence ◽  
Urine Markers

METHYLPHENIDATE PRODUCES A FALSE-POSITIVE URINE AMPHETAMINE SCREEN

2002 ◽  
Vol 18 (5) ◽  
pp. 401 ◽  
Author(s):  
Shannon Manzi ◽  
Terence Law ◽  
Michael W. Shannon
Keyword(s):  
False Positive ◽  
Positive Urine

Kavain Interference with Amphetamine Immunoassay

2020 ◽  
Author(s):  
H Madhavaram ◽  
T Patel ◽  
C Kyle
Keyword(s):  
False Positive ◽  
Cross Reactivity ◽  
Drug Prevention ◽  
Urine Samples ◽  
Gas Chromatography Mass Spectrometry ◽  
Piper Methysticum ◽  
Fragmentation Pattern ◽  
Aboriginal Communities ◽  
Australian Aboriginal ◽  
Positive Urine

Abstract We encountered unexpected false-positive urine results in three patients for amphetamine-type substances by immunoassay (IA), measured as part of community drug prevention programs. Kavain was identified in all three urine samples by gas chromatography-mass spectrometry (GC-MS). No other potential cross-reactants were found. Kavain is a kava-lactone present in kava, a ceremonial and recreational drink derived from the roots and stems of the plant Piper methysticum. It is consumed regularly by many indigenous Pacific and Australian Aboriginal communities. Urine IA was performed on a Beckman Coulter AU480 Analyzer using cloned enzyme donor immunoassay (CEDIA) amphetamine-type substance reagent and DRI ethanol reagent. We purchased three different kava powders from local kava clubs and dissolved in ethanol, then evaporated and reconstituted in blank urine and analyzed by IA, GC-MS for amphetamine-type substances. Additionally, authentic kavain standard was also tested for cross-reactivity by IA and analyzed by GC-MS to compare the mass fragmentation pattern and retention time with the kava powder and patient specimens. The patient urine samples tested positive by CEDIA IA for amphetamines. However, when analyzed by GC-MS, they were negative for amphetamine-type but contained kavain. The kava powders and kavain standard all cross-reacted with the amphetamine IA to give falsely detected results. GC-MS did not identify any amphetamine-type compounds in any of the kava powders nor in the kavain standard. To our knowledge, this is the first report of false-positive amphetamine measurements due to kavain, a component of the kava drink, widely consumed in Oceania and Australasia.

Origin of a false positive urine pregnancy test in a patient with membranoproliferative glomerulonephritis type I

2012 ◽  
Vol 413 (1-2) ◽  
pp. 361-363 ◽  
Author(s):  
Mark A. Marzinke ◽  
Pamela Jarrar ◽  
Meredith Atkinson ◽  
Richard L. Humphrey ◽  
Barbara Detrick ◽  
...  
Keyword(s):  
False Positive ◽  
Membranoproliferative Glomerulonephritis ◽  
Type I ◽  
Pregnancy Test ◽  
Positive Urine ◽  
Membranoproliferative Glomerulonephritis Type I ◽  
Urine Pregnancy Test

Case Reports of Aripiprazole Causing False-Positive Urine Amphetamine Drug Screens in Children

PEDIATRICS ◽  
2015 ◽  
Vol 136 (6) ◽  
pp. e1625-e1628 ◽  
Author(s):  
J. Kaplan ◽  
P. Shah ◽  
B. Faley ◽  
M. E. Siegel
Keyword(s):  
False Positive ◽  
Case Reports ◽  
Positive Urine

Importance of Urine Dipstick in Evaluation of Young Febrile Infants With Positive Urine Culture

2016 ◽  
Vol 32 (12) ◽  
pp. 851-855 ◽  
Author(s):  
Roberto Velasco ◽  
Helvia Benito ◽  
Rebeca Mozun ◽  
Juan E. Trujillo ◽  
Pedro A. Merino ◽  
...  
Keyword(s):  
Urine Culture ◽  
Positive Urine Culture ◽  
Urine Dipstick ◽  
Positive Urine
Sign in / Sign up

Export Citation Format

Share Document