PROM (Premature rupture of membrane) Definition: Spontaneous rupture of membranes after 28 weeks of gestation before the onset of labor. Term PROM: Rupture of membranes after 37 weeks Preterm PROM : Before 37 weeks Prolonged PROM: Longer than 18 hrs / 12 hrs. Latency period: Time between rupture of membranes to onset of labor .
Diagnosis History : complaint of leakage of liquor as gush or slow l eak followed by intermittent leakage Sterile speculum examination with or without valsalva maneuver( leakage or pooling) Nitrazine paper test : principle is alkaline nature of amniotic fluid(accuracy of approximately 93%) Became blue False + ve - blood , semen, alkaline urine, bacterial vaginosis ,
Diagnosis Ferning pattern : A ccuracy of diagnosis of PROM of approximately 96% False + ve : contamination by semen or cervical mucus False – ve : dry swab, contamination with blood at a 1:1 dilution, or not allowing sufficient time for the fluid to dry on the slide Ultrasound: support diagnosis & fetal wellbeing.
I nvestigations CBC Urine analysis(Culture & Sensitivity) High vaginal swab for culture & Sensitivity Biophysical profile CTG for non-stress test
Incidence Average 5- 10% of all deliveries and up to 30% of preterm deliveries. Approximately 70% of cases of PROM occur in pregnancies at term. PROM is the clinically recognized precipitating cause of about one third of all preterm births.
Complications Labor: In term PROM labor starts in 24 hours in about 90%. In Preterm PROM, labor starts in 70-80% of cases in one week time Ascending infection Increased incidence of cord prolapse Fetal pulmonary hypoplasia Prematurity Operative delivery Abruption placenta
Management of PROM Accurate diagnosis Avoid digital vaginal examination Bed rest Management depends on : Gestational age Presence or absence of labor Infection or not Fetal condition
Indications for pregnancy termination in PROM Term PROM Labor Presence of infection IUFD Congenital anomalies of fetus incompatible to life Abnormal fetal surveillance
Preterm PROM GA > 34 weeks- is controversial either conservative management or termination GA < 34 weeks- conservative management
Components of conservative management Monitor maternal Pulse rate,Temp , BP FHR every 4 hours CBC ,U/A,ESR/ CRP twice per week BPP / NST twice per week Corticosteroids if less than 32/34 weeks Administer antibiotics: ampicillin (iv)+ erythromycin X 48hrs followed by amoxacillin ( po ) & erythromycin to complete a total of seven days
Chorioamnionitis Criteria for clinical chorioamnionitis : Maternal temperature > 38 o C Uterine tenderness Foul smelling amniotic fluid High WBC count(>16000/18000) Maternal &/ or fetal tachycardia
Management of chorioamnionitis Antibiotics : Ampicillin+ Gentamycin+ clindamycin/metronidazole/chloramphenicol Ceftriaxone +/- metronidazole Terminate pregnancy: Vaginal route is preferred