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COMPREHENSIVE ABORTION CAREPART II - METHODS OF TERMINATION OF
PREGNANCYYONAS GETACHEW, MD
CLINICAL ADVISOR, CIRHTASS’T PROFESSOR, OB-GYN, ADDIS
ABABA UNIVERSITY
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• Outline methods in first trimester pregnancy terminations • Describe medical methods in first trimester pregnancy terminations • Describe surgical methods in first trimester pregnancy terminations• Outline management of complication of first trimester pregnancy terminations
Objectives
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• Methods in first trimester pregnancy terminations• Medical• Surgical
• Management of complication of first trimester pregnancy terminations
Outline
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• Medical, pharmacologic • Surgical
Methods of termination
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• First trimester: Medical, MVA
• Second trimester: Medical (repeated doses of misoprostol), D&E
Methods of termination
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• Gestational • Clinical condition • Patient choice • Skill • Availability
Choice depends on:
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• Oxytocin, cytotoxic drugs • Prostaglandins• Anti progesterone: Mifepristone, epostane• Hyper osmolar solutions: 20% saline, 30% urea
Medical
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• Vacuum aspirations: MVA, EVA • Sharp curettage: D&C, E&C • Evacuation: D&E, D&X• Balloons, Laminarrie • Amniotomy• Hysterotomy (no more) • Hysterectomy (no more except only in case of complications)
Surgical
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MethodsofTermination
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Medical methods
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• Medication abortion is termination of pregnancy using drugs
• The most commonly used MA agents are mifepristone and misoprostol
Medical methods
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Medication - Abortion Pills
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The Drugs
13
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• Synthetic anti-progesterone• Developed as RU-486• Leads to detachment of the pregnancy from the uterine wall; it also dilates the cervix• Teratogenic if pregnancy continues after use• Given orally: 200mg
Mifepristone
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Mifepristone - mechanism of action
• Progesterone during pregnancy:• Inhibits contractility of myometrium• Inhibits secretion of prostaglandins in
endometrium• Maintains closed cervix
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• Prostaglandin E analogue • Originally manufactured for treatment of PUD• Works by causing uterine contraction and cervical dilatation• Can be used for prevention and/or treatment of PPH• Given in different routes (oral, vaginal, buccal, sublingual)
Misoprostol
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Mechanism of Action: Mifepristone + Misoprostol
RhythmicUterine
Contractions
ProgesteroneBlockade
DecidualNecrosis
CervicalRipening
Detachment Expulsion
Abortion ©LisaPenalver
Source:NAF
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Indications: MA in first trimester
• Pregnancy less than nine weeks since the LMP • (confirm that the woman is pregnant!)
NB: For gestational age >9wks to 12 wks DO MVA
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• Allergy for the medications• Hemorrhagic disorder or concurrent anticoagulant therapy• Suspected or confirmed Ectopic pregnancy• Inherited porphyria
Contraindications
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• Intrauterine device inside the uterine cavity (can remove prior to medical abortion) • Clinically unstable• Severe anemia• Poorly controlled asthma • Chronic adrenal failure
Precautions
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• Asthma • STI • HIV• Breast feeding • Obese • Multiple pregnancy
Special conditions
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• Combination regimen is recommended
• Mifepristone is given 200mg oral
• Misoprostol can be given orally, buccal or sublingually or vaginal
Regimen: dose, route
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• Day 1: Mifepristone - 200mg (1 tab) orally
• Day 3: Misoprostol - 400 (2 tabs) micro gram oral
Dose: less than 7 weeks
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• Day 1: Mifepristone - 200mg (1 tab) orally
• Day 3: Misoprostol - 800 (4 tabs) micro gram vaginal
Dose: less than 9 weeks
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• Mifepristone 200mg per os• followed 36-48h later by misoprostol 800 mcg vaginally• then misoprostol 400mcg vaginal or sublingual every 3h hours
for a total of four doses
Dose: 9-12 weeks
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• Mifepristone 200mg per os,• followed 36-48h later by misoprostol 800 mcg vaginally or
400mcg oral • then misoprostol 400mcg vaginal or sublingual every 3h hours
for a total of four doses
Dose: 13 to 24 weeks
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Misoprostol for missed abortion
• 800 mcg vaginally• Administered at home or in clinic• Success rates: 80-90%
Butè diagnosis of “missed” abortion depends on access to ultrasound
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Misoprostol for Incomplete Abortion
Regimen Efficacy (through 12 weeks by uterine size)
600 mg orally 96.3% Range: 80-90%
400 mg sublingually Limited evidence reports it to be equally effective
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Effectiveness of MA
• Combination of two drugs more effective than either used alone.• Combined regimen is 92-98% effective in pregnancies ≤ 9 weeks since LMP (Von Hertzen et al., 2003).• Miso alone = 85-90% effective
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• Pain• Bleeding• Fever, chills, sweating• Nausea, vomiting• Dizziness• Diarrhea• Skin rashes• Headache
Expected side effects following MA
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• Heavy bleeding • Ongoing pregnancy • Incomplete abortion • Infection
Complications
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• Heavier than normal menstrual bleeding
• Usually begins within 3-4 hours of misoprostole administration
• Average duration: 13 days (from 1 to 60 days)
• Total amount of blood loss related to gestational age
• Keep patient well-informed of expected amount of bleeding
Bleeding
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• Aspiration (MVA) to stop bleeding (0.4 - 2%)
• Transfusion required in approximately 0.2% cases• For early surgical abortion ~ 0.1%
• No reports of hysterectomy for hemostasis after MA reported
Heavy bleeding management
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• Is rare after MA
• Broad spectrum antibiotics
• MVA in case of retained products of conception
Infection
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• Persistence of gestational sac or retention in about 2-5% of MA cases• Clinical signs: Vaginal bleeding or spotting with uterine sub-involution and/or cervical opening• Investigation
• Urine HCG and Ultrasound
Incomplete abortion
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• Depends on patient condition and preferences• If patient clinically stable (no signs of infection, heavy bleeding):
• Provide reassurance, clinical exam and re-evaluate following next menstrual cycle
• Additional doses of misoprostole (as PAC)• MVA• Antibiotics
• If bleeding heavy or detection of infection:• Emergency aspiration with MVA/EVA
Incomplete abortion management
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• Incidence is 1-2%; varies by GA and regimen• Diagnosis:
• Clinical examination• Little or no spotting after MA• Presence of pregnancy symptoms• Enlarged uterus upon clinical examination during check-up visit 2
weeks after Misoprostole• Ultrasound (if available)• Urine HCG
• Management: MVA
Ongoing pregnancy (Failed MA)
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What to do in suspected/diagnosed ectopic pregnancy
Always refer suspected ectopic pregnancies to hospitals where there is operative facility.
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Surgical methods
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Vacuum aspiration is evacuation of content of the uterus using a flexible cannula and syringe.
Surgical: MVA
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1. MVA Cylinder2. Valve3. Cannulae
NB: 1 & 2 in combination are called MVA aspirator
MVA: three parts
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Ipas MVA Plus® with Ipas EasyGrip® Cannula
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Parts Assembled
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• O-ring
• Collar stop
• Plunger
• Barrel
Cylinder contains:
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• Gestational age
• Cervical dilatation
Cannulae selection depends upon:
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• Uterine size 4–6 weeks LMP: suggest 4–7mm
• Uterine size 7–9 weeks LMP: suggest 5–10mm
• Uterine size 9–12 weeks LMP: suggest 8–12mm
Cannulae based on GA
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• Menstrual regulation
• Abortion in first trimester
• Diagnostic procedures
MVA - indications
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MVA is not only used for abortion but also as a diagnostic procedure for:• Infertility• Abnormal uterine bleeding• Amenorrhea• Screening for endometrial infections• Screening for endometrial cancer
Diagnostic use of MVA
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1. Prepare instruments 2. Prepare the woman 3. Perform cervical antiseptic prep4. Dilate cervix5. Insert cannula6. Suction uterine contents7. Inspect tissue8. Perform any concurrent procedures9. Process instruments
Steps of the MVA procedure
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POC examination
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• Ensures pregnancy was inside the uterus• Gives provider feedback on pre-procedure evaluation• Helps provider decide if aspiration was successful• Helps provider plan for follow-up• Increases abortion safety
Why POC examination?
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• Red or pink foam without tissue passing through cannula
• Gritty sensation over surface of uterus
• Uterus contracting around cannula
• Increased uterine cramping
Signs of complete evacuation
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• Vagal reaction
• Incomplete evacuation
• Uterine/cervical injury
• Pelvic infection
• Acute hematometra
Adverse events
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EVA machine
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Sharp metal curette - D&C, E&C
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• Complications • Duration • Pain, bleeding • Skill • Post procedure stay
Sharp metals - E&C and D&C
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• Is no longer recommended
• High risk of complications - bleeding, perforation
• Only in a place where there is no MVA
Sharp curate
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Ovum Forceps
Curette
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Dilatation and Evacuation (D&E) – A surgical method of abortion using a combination of cervical dilatation, suction aspiration and specialized forceps to assist in tissue evacuation.
Dilatation and evacuation: D&E
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• First - MVA and MA
• Second - D&E and MA
Appropriate technology – WHO, 2012
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• Methods • Early complications: perforation, sepsis ,acute hematometra, bowel injury bleeding, death • Delayed/late complications: preterm labor, chronic pelvic pain, infertility, recurrent abortion
Complications
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• WHO, “Safe Abortion: Technical and policy guidance for health systems,” second edition, 2012 • Ipas, “Clinical updates in reproductive health,” January 2016• FMOH, “Technical and procedural guideline for safe abortion service in Ethiopia,” second edition, June 2014 • Reproductive Health Matters, “Second trimester abortion,” vol16, no 31 supplement, May 2008• Standard text books
References
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Thank You