antepartum assessment ppt ko
TRANSCRIPT
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ANTEPARTUM ASSESSMENT
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GOALS
• To prevent fetal death• To select gravidas with high risk of developing
major complications• To avoid unnecessary inerventions
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TESTS
• Non-stress test• Contraction Stress Testing• Biophysical profile Testing
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ASSESSED
• Fetal Movements• Fetal heart Rate• Fetal Breathing• Amniotic fluid
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FETAL MOVEMENT
• Fetal movement is positively associated with fetal well being and negatively associated with intrauterine demise
• Average fetal movements varies with gestational age
• Maternal perception of fetal movements varies
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Fetal Movements
• State 1F is a quiescent state—quiet sleep—with a narrow oscillatory bandwidth of the fetal heart rate
• State 2F includes frequent gross body movements, continuous eye movements, and wider oscillation of the fetal heart rate. This state is analogous to rapid eye movement (REM) or active sleep in the neonate
• State 3F includes continuous eye movements in the absence of body movements and no heart rate accelerations. The existence of this state is disputed (Pillai and James, 1990a)
• State 4F is one of vigorous body movement with continuous eye movements and heart rate accelerations. This state corresponds to the awake state in infants.
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Fetal Breathing
• Paradoxical• Episodic• Non biomarker for fetal health– Assessed together with fetal biophysical indices.
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Contraction Stress Testing
• Uteroplacental pathology• Placental Insufficiency
Or Oxytocin Challenge Test
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Criteria for Interpretation of the Contraction Stress Test
Negative: no late or significant variable decelerations
Positive: late decelerations following 50% or more of contractions (even if the contraction frequency is fewer than three in 10 minutes)
Equivocal-suspicious: intermittent late decelerations or significant variable decelerations
Equivocal-hyperstimulatory: fetal heart rate decelerations that occur in the presence of contractions more frequent than every 2 minutes or lasting longer than 90 seconds
Unsatisfactory: fewer than three contractions in 10 minutes or an uninterpretable tracing
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Non-stress Test
• primary method of testing fetal health • Incorporated with Fetal heart rate.– sleep cycles– depression from medications – maternal cigarette smoking
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•increase of fetal heart rate to more than 15 beats/min for longer than 15 sec following fetal movements
Normal nonstress test
•baseline oscillation of less than 5 bpm,
• absent accelerations, and
•late decelerations with spontaneous uterine contraction
Abnormal nonstress test
•Death within 7 days of normal nonstress test
False-normalnonstress test
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Biophysical Profile Testing
• Aided by sonography machine and Doppler ultrasound
• five biophysical components assessed:– fetal heart rate acceleration– fetal breathing – fetal movements– fetal tone – amnionic fluid volume.
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