Accuracy and influence of ascorbic acid on glucose-test with urine dip sticks in prenatal care.
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Accuracy and influence of ascorbic acid on glucose-test with urine dip sticks in prenatal care. / Ritterath, Claudia; Siegmund, Tina; Rad, Neda Talai; Stein, Ursula; Bühling, Kai J.
In: J PERINAT MED, Vol. 34, No. 4, 4, 2006, p. 285-288.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Accuracy and influence of ascorbic acid on glucose-test with urine dip sticks in prenatal care.
AU - Ritterath, Claudia
AU - Siegmund, Tina
AU - Rad, Neda Talai
AU - Stein, Ursula
AU - Bühling, Kai J.
PY - 2006
Y1 - 2006
N2 - OBJECTIVE: In Germany, urine analysis with dip sticks are used for screening of gestational diabetes. Our goal was to find the cut-off levels of glucose dip sticks and evaluate the influence of ascorbic acid on the result. STUDY DESIGN: We took urine samples of 152 pregnant patients between 01/2004 and 10/2004. The glucose content of the urine was analyzed using several dip sticks (Combur10 Roche, Multistix 8SG Bayer, Diabur5000 Roche and by the hexokinase method. The ascorbic acid concentration of the specimen was determined. RESULTS: Glycosuria test dip sticks have a good sensitivity and specificity of the expected positive/negative-reaction compared with the hexokinase method but showed a significant reduction of the color reaction at high concentrations of ascorbic acid. CONCLUSION: High ascorbic acid concentrations cause a reduction in the color reaction of urine dip sticks. False-negative test stick measurements can appear in patients with low glycosuria. The rate of glycosuria shows high individual differences and dependent on the concentration of vitamin C. We conclude that dip sticks are not useful in prenatal management.
AB - OBJECTIVE: In Germany, urine analysis with dip sticks are used for screening of gestational diabetes. Our goal was to find the cut-off levels of glucose dip sticks and evaluate the influence of ascorbic acid on the result. STUDY DESIGN: We took urine samples of 152 pregnant patients between 01/2004 and 10/2004. The glucose content of the urine was analyzed using several dip sticks (Combur10 Roche, Multistix 8SG Bayer, Diabur5000 Roche and by the hexokinase method. The ascorbic acid concentration of the specimen was determined. RESULTS: Glycosuria test dip sticks have a good sensitivity and specificity of the expected positive/negative-reaction compared with the hexokinase method but showed a significant reduction of the color reaction at high concentrations of ascorbic acid. CONCLUSION: High ascorbic acid concentrations cause a reduction in the color reaction of urine dip sticks. False-negative test stick measurements can appear in patients with low glycosuria. The rate of glycosuria shows high individual differences and dependent on the concentration of vitamin C. We conclude that dip sticks are not useful in prenatal management.
M3 - SCORING: Zeitschriftenaufsatz
VL - 34
SP - 285
EP - 288
JO - J PERINAT MED
JF - J PERINAT MED
SN - 0300-5577
IS - 4
M1 - 4
ER -
