Which test is used to confirm rupture of membranes in labor?

• A. Escort to bathroom
• B. Bed pan
• C. Nitrazine test
• D. Clean the perineal area

Answer: (C)

Testing for rupture of membranes centers on detecting amniotic fluid leaking from the uterus. The bedside nitrazine test uses a pH-sensitive paper. Amniotic fluid is alkaline compared with vaginal secretions, so when fluid from the cervix or vagina is applied to the test paper, it turns blue if membranes have ruptured. This quick color change helps confirm ROM at the bedside. Keep in mind that certain factors can affect the result—blood, semen, or vaginal infections can lead to false readings—so clinicians commonly use the test alongside other assessments, such as a speculum exam to observe pooling or a fern test under the microscope. The other listed actions are hygiene or comfort measures and do not diagnose rupture of membranes.