If you are a doctor In the midnight, awakens to find that they have to sleep in a pool of blood You How to diagnosis? How to management? Antepartum Hemorrhage Obstetrics & Gynecology Hospital of Fudan University Xu Huan Rationale (why we care…) • 4-5% of pregnancies complicated by 3rd trimester • • • • bleeding Immediate evaluation needed Significant threat to mother & fetus (consider physiologic increase in uterine blood flow) Consider causes of maternal & fetal death Priorities in management (triage!) Objectives We will be able to: • Describe the approach to the patient with thirdtrimester bleeding • Compare symptoms, physical findings, and diagnostic methods that differentiate bleeding etiologies • Describe management and delivery options for 3rd trimester bleeding etiologies • Describe potential maternal and fetal morbidity & mortality • Describe management of postpartum hemorrhage • Apply knowledge in the discussion of clinical case scenarios Vaginal Bleeding: Differential diagnosis • Common: • Abruption, previa, preterm labor, labor • Less common: • Uterine rupture, fetal vessel rupture, lacerations/lesions, cervical ectropion, polyps, vasa previa, bleeding disorders • Unknown • NOT vaginal bleeding!!! (happens more than you think!) Other Etiologies • Cervicitis • infection • Cervical erosion • Trauma • Cervical cancer • Foreign body • Bloody show/labor Perinatal mortality and morbidity • Previa • Decreased mortality from 30% to 1% over last 60 years • Now emergent cesarean delivery often possible • Risk of preterm delivery • Abruption • Perinatal mortality rate 35% • Accounts for 15% of 3rd trimester stillbirths • Risk of preterm delivery • Most common cause of DIC in pregnancy • Massive hemorrhage --> risk of ARF, Sheehan’s, etc. Placenta previa Definition After 28 pregnant weeks placental implantation over the cervical os or in the lower uterine segment It constitutes an obstruction of descent of the presenting part Main cause of obstetrical hemorrhage(20%) Incidence 0.24%-1.57% (our country). Risk factors & Associations • • • • • • • • Prior cesarean delivery/myomectomy Prior previa (4-8% recurrence risk) Previous abortion Increased parity Multiple pregnancy Advanced maternal age Abnormal presentation Smoking Etiology 1. 1) 2) 2. 3. Causes Endometrial abnormality Scared or poorly vascularized endometrium in the corpus. Curettage, Delivery, CS and infection of endometrium Placental abnormality Large placenta (multiple pregnancy), succenturiate lobe Delayed development of trophoblast Classification Marginal placenta previa Partrial Complete placenta previa placenta previa Manifestation(1) Symptoms • Painless vaginal bleeding (70%) • Spontaneous,After coitus • The most characteristic symptom • late pregnancy (after the 28th week) and delivery • Characteristics: sudden, painless and profuse • Contractions • No symptoms • Routine ultrasound finding The mean gestational age of first bleed: 30 wks 1/3 before 30 weeks Manifestation(2) Anemia or shock repeated bleeding→ anemia heavy bleeding→ shock Abnormal fetal position a high presenting part breech presentation (often) Physical Findings • Bleeding on speculum exam • Cervical dilation • Bleeding a sx related to PTL/normal labor • Abnormal position/lie • Non-reassuring fetal status • If significant bleeding: • Tachycardia • Postural hypertension • Shock Diagnosis(1) 1. 2. 3. History Painless hemorrhage At late pregnancy or delivery History of curettage or CS Diagnosis(1) 1. 1) 2) 3) 4) Signs Abdominal findings Uterus is soft, relaxed and nontender. Contraction may be palpated. A high presenting part can’t be pressed into the pelvic inlet. Breech presentation Fetal heart tones maybe disappear (shock or abruption) Diagnosis Speculum examination Rule out local causes of bleeding, such as cervical erosion or polyp or cancer. Limited vaginal examination (seldom used) Palpation of the vaginal fornices to learn if there is an intervening bogginess between the fornix and presenting part. Rectal examination is useless and dangerous Limited vaginal examination Diagnosis(1) • Ultrasound • abdominal 95% accurate to detect • transvaginal (TVUS) will detect almost all • consider what placental location a TVUS may find that was missed on abdominal • MRI • Check the placenta and membrane after delivery remember: no digital exams unless previa RULED OUT! Diagnosis Before 20 weeks’ gestation,4-6% have some degree of placenta previa on ultrasonic examination 90% of these resolving by the third trimester Only 10% of complete placenta Differential Diagnosis Placental abruption vagina bleeding with pain, tenderness of uterus. vasa previa In cases of velamentous cord insertion fetal vessels cover cervical os Abnormality of cervix cervical erosion or polyp or cancer vasa previa Effects obstetrical hemorrhage Placenta accreta, increta, and percreta Anemia and infection Premature labor or fetal death or fetal distress Treatments 1. 2. 3. 4. Expectant therapy Rest: keep the bed Controlling the contraction: MgSO4 Treatment of anemia Preventing infection Treatments 1. 1) 2) 3) Termination of pregnancy CS total placenta previa (36th week), Partial placenta previa (37th week) and heavy bleeding with shock Preventing postpartum hemorrhage: pitocin and PG Hysterectomy: Placenta accreta or uncontroled bleeding Treatments 2. Vaginal delivery Marginal placenta previa Vaginal bleeding is limited Management • Initial evaluation/diagnosis • Observe/admit to L&D • IV access, routine (maybe serial) labs • Continuous electronic fetal monitoring • Continuous at least initally • May re-evaluate later if stable, no further bleeding • Delivery??? Management • Less than 36 wks gestation - expectant management if stable, reassuring • Bed rest (negotiable) • No vaginal exams (not negotiable) • Steroids for lung maturation (<32 wks) • Possible mgmt at home after 1st bleed 70% will have recurrent vaginal bleeding before 36 completed weeks requiring emergent cesarean Management • 36+ weeks gestation • Cesarean delivery if positive fetal lung maturity by amniocentesis • Delivery vs expectant mgmt if fetal lung immaturity • Schedule cesarean delivery at 37 weeks • Discussion/counseling regarding cesarean hysterectomy Note: given stable maternal and reassuring fetal status, none of these management guidelines are absolute (this is why Obstetrics is so much fun!) Other Considerations • Placenta accreta, increta, percreta • Cesarean delivery may be necessary • History of uterine surgery increases risk • Must consider these diagnoses if previa present • Could require further evaluation, imaging (MRI considered now) NOT the delivery you want to do at 2 am A B Abnormally adherent placentation. A. Placenta accreta. B. Placenta increta. C. Placenta percreta C Cesarean hysterectomy specimens with placenta percreta. Cesarean hysterectomy specimens with placenta percreta. Placental abruption Definition • abruptio placentae or placental abruption: placental separation from its implantation site before delivery (the normally implanted placenta ) • Incidence • complicates 0.5-1.5% of all pregnancies • recurrence risk • 10% after 1st episode • 25% after 2nd episode Risk factors & Associations Cocaine maternal hypertension abdominal trauma smoking prior abruption preeclampsia multiple gestation prolonged PROM uterine decompression short umbilical cord chorioamnionitis multiparity Pathology Placental separation is initiated by hemorrhage into the decidua basalis with formation of a decidual hematoma Concealed hemorrhage Revealed hemorrhage revealed hemorrhage concealed hemorrhage Total placental abruption with concealed hemorrhage and fetal death Maternal-fetal risk perinatal mortality: 35% DIC hypovolemic shock acute renal failure Sheehan’s syndrome Symptoms • Vaginal bleeding • Abdominal or back pain • Uterine contractions • Uterine tenderness Physical Findings • Vaginal bleeding • Uterine contractions • Hypertonus • Tetanic contractions • Non-reassuring fetal status or demise • Can be concealed hemorrhage Laboratory Findings • Anemia • may be out of proportion to observed blood loss • DIC • Can occur in up to 10% (30% if “severe”) • First, increase in fibrin split products • Followed by decrease in fibrinogen Diagnosis • Clinical scenario • Physical exam • Not digital pelvic exams until rule out previa • Careful speculum exam • Ultrasound • Can evaluate previa • Not accurate to diagnose abruption Management • Physical exam • Continuous electronic fetal monitoring • Ultrasound • Assess viability, gestational age, previa, fetal position/lie • Expectant management • vaginal vs cesarean delivery • Available anesthesia, OR team for stat cesarean delivery Partial placental abruption with adhered clot Couvelaire Uterus