restores placental for fetal oxygenation and uterine vessel blood circulation

Restores placental for fetal oxygenation and uterine

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restores placental for fetal oxygenation and uterine vessel blood circulation Frequency – time between the beginning of one contraction and the beginning of the next Duration – measured from the beginning of the contraction to the completion of the same contraction Intensity – the strength of the contraction during the acme (peak) Estimated by palpation or intrauterine catheter attached to EFM o Psychosocial considerations Fear and anxiety may lead to increased perception of pain and impede progress of labor Physiology of labor o Usually begins between 38-42 weeks gestation o Effacement – the taking up of the internal opening and cervical canal into the uterine side walls The thinning of the cervix o Cervical dilatation – uterine muscle pull upward, forcing the fetus downward The widening of the cervix from 1 cm to 10 cm Signs of labor o Lightening – settling of the uterus and fetal presenting part into the pelvic inlet (sensation of decreased abdominal distention) o Braxton hicks – irregular contractions o Cervical changes Effacement – thinning and shortening of the cervix during late pregnancy and labor Dilation o Bloody show – mucus plug being expelled o ROM SROM – generally occurs at the height of an intense contraction PROM – before onset of labor at any gestational age PPROM – occurs before 37 weeks gestation AROM o Sudden burst of energy o Other Weight loss – resulting from fluid loss and electrolyte shifts Increased backache Diarrhea, nausea, vomiting True labor o Contractions occur at regular intervals Interval between contractions shorten
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o Contractions increase in duration o Back pain radiating to abdomen o Intensity increases with walking o Contractions do not decrease with rest False labor o Irregular contractions No change in frequency o No change in contraction duration o Discomfort only in abdomen o Walking eases intensity o Resting eases contractions Stages of labor o 1 st stage – onset of labor to dilation of 10 cm Latent – cervix begins to dilate to about 4 cm Regular contractions with increased frequency, duration, and intensity Excitement is high Active – cervix dilates from 4 to 7 cm and descent of fetus is progressive Anxiety increasing Fear of losing control Use of coping mechanisms Transition – cervix dilates from 8 to 10 cm Mother is moody and may frequently change positions Increased rectal pressure, uncontrollable urge to push Fear of tearing/splitting open o 2 nd stage – 10cm to birth Urge to push Perineum begins to bulge as fetal head descends Fetal head going in and out Burning sensation as crowning occurs Cardinal movements Positional changes of the fetal head and body in order to adjust to the maternal pelvis and pass through the birth canal o 3 rd stage – birth of infant to delivery of placenta Should take 30-40 minutes
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  • Winter '12
  • Wismont
  • Obstetrics, Fetal presentation, fetal movement, fetal heart, fetal hypoxia

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