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Can Vaginal Washing Fluid Urea, Creatinine and Qualitative β-hCG Diagnose Suspected Premature Rupture of Membranes?

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Several markers have been studied to diagnose PROM but there is still limitation with a gold standard test for the diagnosis [1]. Objective: To evaluate and compare the accuracy of urea, creatinine and hCG in vaginal fluid washing for diagnosis of PROM and to determine cut off levels. Type of the study: Prospective study performed on pregnant women in their third trimester who are coming to Kasr El Ainy maternity outpatient clinic with history of fluid leakage. Patients and methods: 150 patients between 26 - 40 weeks were included in the study. Group I included 50 patients with clinically confirmed ROM, group II included 50 with unconfirmed ROM and 50 controls with no complaints (group III). All patients were subjected to speculum examination for amniotic fluid pooling, nitrazine paper test, vaginal fluid washing for measurement of creatinine, urea and β-hCG, and ultrasound examination. The results were compared as regards the 3 study groups. Results: There was no statistically significant difference among the 3 study groups as regards age, parity BMI, nor gestational age. There was a statistically significant difference in creatinine level among confirmed, suspected and control groups. Urea levels showed also a statistically significant difference among the three groups. There was a positive correlation between vaginal creatinine and urea and gestational age in the 3 groups (r = 0.43, and 0.51 respectively). There was a statistically significant difference between vaginal fluid wash urea and creatinine levels and β-hCG as sensitivity, specificity, positive and negative predictive values and accuracy for urea and creatinine were all 100% and for qualitative β-hCG 83%, 100%, 100%, 85.6%, and 91% respectively. Conclusion: Urea and creatinine in vaginal washings can be accurately used in diagnosing suspected PROM and are more accurate than β-HCG.
Cite this paper
Osman, O. and Elghazaly, M. (2014) Can Vaginal Washing Fluid Urea, Creatinine and Qualitative β-hCG Diagnose Suspected Premature Rupture of Membranes?. Open Journal of Obstetrics and Gynecology, 4, 967-972. doi: 10.4236/ojog.2014.415136. 
 

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