Blood will interfere with the nitrazine test for detecting ruptured membranes because:
Correct Answer: It is alkaline
Description: Blood mixes with nitrazine to produce false positive results, as there is increase in ph. It turns the litmus paper to blue suggestive of PROM. TEXTBOOK OF OBSTETRICS, SHEILA BALAKRISHNAN, 2nd EDITION,pg:197
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Gynaecology & Obstetrics
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