The Study of Vaginal Fluid Urea, Creatinine, B-HCG and Placental Alpha-1 Microglobulin in Diagnosis of Premature Rupture of Membranes

摘要

Purpose: To evaluate and compare the reliability, accuracy and the cost benefit ratio of vaginal washing fluid urea, creatinine, Beta Human Chorionic Gonadotropin ( β -HCG) and placental alpha Microglobulin-1 (PAMG-1) for diagnosis of premature rupture of membranes (PROM). Material and Methods: A diagnostic study conducted on 70 patients. The patients were divided into three groups: Group A ( n = 25): (Confirmed PROM group) patients who were either in labor or not in labor, Gestational age was from 24 weeks onwards and fulfilled the following criteria and/or two of these criteria with low AFI positive pooling, positive nitrazine paper test, positive fern test . Group B (n = 25): (Suspected PROM group) patients who fulfilled the following criteria: Patients with fluid leakage complaint with negative pooling and/or negative nitrazine paper test and/or negative fern test. Group C (n = 25): (Control group with no PROM) patients that were admitted to prenatal clinic for their regular prenatal control visit with 24 - 42 weeks of gestational age without any complaint or complication and with negative pooling, negative nitrazine paper test and/or negative fern test. The vaginal washing fluid urea, creatinine, Beta-Human Chorionic Gonadotropin ( β -HCG) and placental alpha Microglobulin-1 (PAMG-1) were determined for diagnosis of premature rupture of membranes (PROM). Results: PAMG-1 detection in cervico vaginal discharge was a very good test for diagnosis of PROM with high sensitivity, specificity, positive predictive value, negative predictive value, accuracy and P-value (96%, 100%, 100%, 95.84%, 97.78% and <0.0001 respectively). Urea and Creatinine is the second option in diagnosis of PROM with high sensitivity, and specificity after PAMG-1 with a privilege of low cost than PAMG-1. Furthermore they were more accurate than β -HCG. Conclusion: Detection of PAMG-1 in cervico vaginal discharge is promising in diagnosis of PROM & especially in those cases of suspected PROM and it should be done as a worse trial in every case of suspected PROM. Urea and Creatinine is the second option in diagnosis of PROM with high sensitivity, and specificity after PAMG-1 with a privilege of low cost than PAMG-1. Also they were more accurate than β -HCG and they can be used if PAMG-1 is not available for detection of doubtful PROM cases .