Presentation on theme: "Linda L. Franco RN MSN NE-BC"— Presentation transcript:
1 Linda L. Franco RN MSN NE-BC Childbirth At Risk- Tie everything togetherLinda L. Franco RN MSN NE-BC
2 Woman with Psychological Disorders Depression, Bipolar disorder, anxiety, phobias, obsessive-compulsive disorder, Posttraumatic stress disorder,SchizophreniaEffect on LaborJeopardize health of mother and fetusExacerbate painMyometrial dysfunctionNursing InterventionCommunicate concerns and make choicesPharmacologic measures
3 The prevalence of psychological disorders among adults in the United States is 22.1%. The psychological disorders which most commonly affect pregnant women are depression, bipolar disorder, anxiety, phobias, obsessive-compulsive disorder, posttraumatic stress disorder, and schizophrenia.Maternal implications –Depression – reduces the woman’s ability to concentrate or process information provided by the health care team.Bipolar – Exhibit same symptoms of depression during the depressed phase, but if labor occurs during a manic phase, the woman may be hyperexcitable.Anxiety disorders – may cause the woman to experience physical symptoms such as chest pain, shortness of breath, faintness, or even terror.Behaviors may be exaggerated during labor. Your goal as a nurse is to provide strategies that will help decrease the anxiety of the woman and her partner, keep her oriented to reality, and promote optimal functioning while in labor. All questions and concerns should be addressed promptly. Pharmacological measures such as sedatives, analgesics, or antianxiety medications may be ordered.
4 Dysfunctional Uterine Contractions Hypertonic Labor PatternContractions are more frequent but less effectiveIncreased pain and fatigueStresses coping abilitiesFetal distressDehydration and increased risk for infectionNonreassuring fetal statusProlonged pressure on fetal headIrregular in strength, timing or both, then cervix won’t dilate = prolonged labor3:15
5 Difficult labor is most commonly due to uncoordinated uterine contractions, which results in a prolonged labor. Dysfunctional contractions are typically irregular in strength, timing, or both. These irregular uterine contractions often arrest cervical dilatation.Normal contraction pattern = 2 to 4 contractions in 10 minutes in early labor and 4-5 per 10 minutes in later phases.
6 Clinical Therapy Bed rest Sedation Pitocin Infusion Amniotomy Provide Comfort and Support
7 Hypotonic Labor Pattern Less than 2 to 3 contractions in a 10 minute periodMaternal exhaustionStresses coping abilitiesIncreased risk for Postpartal HemorrhageFetal DistressMaternal and Fetal sepsis
8 Hypotonic labor pattern usually develops in the active phase of labor, after labor has been well established. May occur when the uterus is overstretched from a twin gestation, or in the presence of a large fetus, hydramnios (an excess of amniotic fluid, leading to overdistension of the uterus. Frequently seen in diabetic women, even if there is no coexisting fetal anomaly), or grand multiparity. Bladder and bowel distention and CPD (cephalopelvic disporportion) may also be associated with this pattern.Postpartal hemorrhage – from insufficient uterine contractions following birth.Fetal sepsis from pathogens that ascend from the birth canal.
9 Clinical Therapy Pitocin Infusion Nipple stimulation- release natural pitocinAmniotomyCesarean Section if labor does not become effective or if complications developAssessment of Contractions, FHR, VS, amniotic fluidMonitor for Infection, Dehydration, and Fetal Distress
10 Pitocin increases the strength and regularity of contractions. Nipple stimulation causes the release of endrogenous oxytocin (natural Pitocin). Can use an electric breast pump or manual stimulation. Again, pelvis proportion, fetal maturity, and position of presenting part should be determined before progressing with these options.Amniotomy – may be used to stimulate the labor process.If amniotic membranes are ruptured, the nurse assesses fro the presence of meconium (dark green or black stool expelled from the fetal large intestine). The presence of meconium in the amniotic fluid is indicative that the fetus is experiencing some form of stress.Encourage the patient to void every 2 hours and check her bladder for distention. Evaluate patient for signs of infection (elevated temperature, chills, foul-smelling amniotic fluid, and fetal tachycardia). Vaginal exams should be kept at a minimum.
11 Precipitous Labor & Birth Labor that lasts less than 3 hoursLoss of coping abilitiesLacerations of cervix, vagina, and perineumPostpartal HemorrhageFetal distressCerebral TraumaPneumothorax from rapid descentPrecipitous BirthUnexpected, sudden, unattended birth
12 Contributing factors in precipitous labor are maultiparity, large pelvis, previous precipitous labor, and a small fetus in a favorable position. Precipitous labor and precipitous birth are not the same. A precipitous birth is an unexpected, sudden and often unattended birth.Postpartal hemorrhage is due to undetected lacerations or inadequate uterine contractions after birth. Fetal implications-Nonreassuring fetal status or hypoxia from decreased uteroplacental circulation due to intense uterine contractions.Cerebral trauma from rapid descent through the birth canal.Pneumothorax from rapid descent through the birth canal.
13 Clinical Therapy History of Precipitous Labor Close monitoring in last few weeksScheduled Induction of LaborEmergency birth pack in roomNurse remains in roomMonitor for Pitocin overdoseMonitor fetus for signs of distressDilation of >2cm/hr = precipitous labor
14 If the cervix softens and begins to dilate, the woman may be scheduled for immediate induction of labor. During labor the presence of one or both of the following factors may indicate potential problems:Accelerated cervical dilatation (>2 cm/hr in multigravidas and >1.2 cm/hr in primigravidas) and fetal descent.Intense uterine contractions with little uterine relaxation between contractionsPitocin overdose – Increase in BP by 30% above baseline. Cardiac output and stroke volume increase with a decrease in urine output.Fetal distress – nonreasuring fetal distress, bradycardia, late or variable decelerations.If the woman who is receiving Pitocin develops an accelerated labor pattern, the Pitocin is discontinued immediately, and the woman is turned on her left side to improve uterine perfusion. Oxygen may be administered to increase the available oxygen in maternal circulating blood, which in turn increases the amount available for exchange at the placental site. Continually monitor fetus for hypoxia.
15 Postterm Pregnancy Pregnancy that lasts more than 42 weeks Maternal RisksInductionLarge for Gestational AgeForceps, vacuum, or cesarean assisted birthPsychological stressFetal RisksDecreased perfusion to placentaOligohydramniosMeconium aspiration
16 A postterm pregnancy is one that extends more than 294 days or 42 weeks past the first day of the last menstrual period. It is important to distinguish between the term postdate, which means that the pregnancy has gone beyond the estimated date of birth (EDB), and postterm, which indicates that the pregnancy has gone at least 1 day beyond 42 complete weeks fro the last menstrual period.Occurrence is low 4-14%.True cause is unknown, but it seems to occur more frequently in primigravidas and women over age 35.Fetal Risks:The intrauterine environment becomes unfavorable for growth, and at birth the infant has lost muscle mass and subcutaneous fat. Placental blood flow peaks around 36 weeks. After 40 weeks there is an increase in edema, fibrosis, fibrin deposits, and avascular villi. Premature aging can occur in HTN, IDDM, and renal disease. Smoking causes smaller, more fibrin deposits, and fewer capillaries.Oligohydramnious – decreased amount of amniotic fluid which increases the risk of cord compression.
17 Clinical Therapy Nonstress Test and Biophysical Profile Maternal monitoring of fetal movementInduction of laborMonitor FHR and amniotic fluidEmotional support
18 Nonstress test – An assessment method by which the reaction for reaction (or response) of the fetal heart rate to fetal movement is evaluated.Biophysical profile – Assessment of five variables in the fetus that help to evaluate fetal risk: breathing movement, body movement, tone, amniotic fluid volume, and fetal heart rate reactivity. Emphasis is placed on the amniotic fluid volume portion. These tests may be done 2-3 times a week to help evaluate fetal well-being.Monitor FHR and amniotic fluid – Check for reassuring patterns and nonreassuring such as nonperiodic variable decelerations (which are associated with cord compression), so corrective actions can be taken.Assess amniotic fluid for meconium.
19 Fetal MalpositionOcciput Posterior- (most common) occiput of fetal head at back of maternal pelvisLow back pain for momLabor prolongedIncreased risks of 3rd and 4th degree lacerationsClose monitoring of maternal and fetal statusForceps, vacuum or cesarean assisted deliveryChanging maternal positionsCan still be born vag w/o C-SectionDo knee to chest position to direct head down to foot
20 The occiput-posterior position is the most common fetal malposition The occiput-posterior position is the most common fetal malposition. When the fetus is OP, the occiput of the fetal head is directed toward the back of the maternal pelvis. During labor 90-95% of OP fetuses rotate to an occiput-anterior position.Majority of OP fetuses are born vaginally.Signs and symptoms of persistent OP position include complaints of intense back pain by the laboring woman, a dysfunctional labor pattern, hypotonic labor (the fetal head does not put adequate pressure on the cervix), arrest of dilatation, or arrest of fetal descent. The back pain is caused by the fetal occiput compressing the sacral nerves.FHR is typically heard far laterally on the abdomen above the symphysis.Changing maternal posture has been used for many years to enhance rotation of OP or occiput-transverse (OT) to OA. The patient may be asked to rotate from one side to the other. This allows a support person to apply counter pressure on the sacral area to decrease discomfort. A knee-chest position provides a downward slant to the vaginal canal, directing the fetal head downward on descent.
21 Cephalic Presentations VertexOcciputMilitaryTop of headBrowForeheadFace
22 In a normal presentation, the occiput is the presenting part. In a brow presentation, the forehead of the fetus becomes the presenting part.In the military presentation, the fetal head is between flexion and extension, whereas in the occipitomental presentation the fetal head enters the birth canal with the widest diameter of the head (approx cm) foremost.Brow presentation occurs more often in multiparas and is thought to be due to lax abdominal and pelvic musculature. Brow presentations are the least common type of abnormal presentations.
24 Brow Presentation Forehead is the presenting part Fetal head is between flexion and extensionMaternal/Fetal ImplicationsLonger laborIncreased Cesarean birthCerebral and neck compression with damage to the trachea and larynxClinical TherapyEpisiotomyCesarean SectionMonitor for fetal distressFetal-neonatal risks include increased mortality because of cerebral and neck compression and damage to the trachea and larynx. In addition, facial edema, bruising, and exaggerated molding of the newborn’s head may be observed.
25 Face Presentation Multi, preterm, anachephaly Face is presenting part 1:600Maternal/Fetal RisksCPD and prolongation of laborInfectionCesarean BirthCephalhematoma and edema of the face and throatPronounced molding of the fetal headClinical TherapyEpisiotomy,Cesarean Section and monitor for fetal distressNurse plans same as brow
26 Face presentation occurs most frequently in multiparas, in preterm birth, and in the presence of anencephaly (absence of brain ). The incidence of face presentation is about 1 in 600 births.Maternal RisksInfection due to prolonged laborNursing AssessmentFHR are audible on the side where the fetal feet are palpated. It may be difficult to determine by vaginal examination whether a breech or face is presenting, especially if facial edema is already present.Nursing Plan is the same as for brow presentation.
30 Breech presentations Frank Breech Footling Breech Complete Breech The exact cause of breech presentation is unknown. This malpresentation occurs in about 3-4% of labors and is frequently associated with preterm birth, placenta previa, hydramnios, multiple gestation, uterine anomalies, and fetal anomalies (especially anencephaly and hydrocephaly).Frank Breech – Buttocks is the presenting part. Legs are against the torso.Footling (incomplete) – One foot is the presenting part.Complete – Buttock is the presenting part with the infant lying in the left sacral anterior position.
34 Maternal/Fetal Implications Cesarean BirthPerinatal morbidity and mortalityProlapsed cordCervical cord injuries due to hyperextension of the fetal neckBirth traumaFHR is usually auscultated above the umbilicus. Passage of meconium into the amniotic fluid due to compression of the fetal intestinal tract is common.Prolapsed cord – if the membranes are ruptured, the nurse is particularly alert for a prolapsed umbilical cord, especially in footling breeches, because there is a space between the cervix and presenting part through which the cord can slip. If the infant is small and the membranes rupture, the danger is even greater. The risk of a prolapsed cord is one reason why any woman with ruptured membranes should not ambulate until a full assessment has been performed.
35 Clinical Therapy External Version Cesarean Section Monitor for fetal distressObserve for Meconium stained amniotic fluidExternal cephalic version (ECV) (procedure involving external manipulation of the maternal abdomen to change the presentation of the fetus from breech to cephalic). This may be attempted at weeks’ gestation as long as the woman is not in labor.
36 Transverse Lie External Version Cesarean Section Assess FHR A transverse lie occurs in approx. 1 in 300 term births. Maternal conditions associated with a transverse lie are grand multiparity with relaxed uterine muscles, preterm fetus, abnormal uterus, excessive amniotic fluid, placenta previa, and contracted pelvis.When a shoulder presentation is still evident at 37 weeks, an external cephalic version attempt is recommended, followed by induction of labor, because the associated risk of prolapsed cord is significant.On inspection the woman’s abdomen appears widest from side to side as a result of the long axis of the infant’s body lying parallel to the ground and across the mother’s uterus. FHR is usually auscultated just below the midline of the umbilicus.
38 Macrosomia “Large for gestational age (LGA)” Weight of > 4000gms = 8.8lbsOffspring of large parents and women with diabetes, male infantMaternal/Fetal ImplicationsCPD, Dysfunctional Labor, Tissue Laceration, and Postpartal HemorrhageMeconium Aspiration, Asphyxia, Shoulder Dystocia, Brachial Plexus injury and fractured claviclesResult in fetal death
39 Weight of 4000 grams = 4 kilo = 8.8 pounds CPD (cephalopelvic disproportion) Pelvis is too small for the birth.Shoulder dystocia, in which, after birth of the head, the anterior shoulder fails to deliver either spontaneously or with gentle traction, may result in fetal death if unresolved.
40 Clinical Therapy Cesarean Section if weight > than 4500gms McRoberts maneuver or suprapubic pressureMonitor FHR and for signs of fetal distressMonitor for PP hemorrhageMonitor for:cephalhematoma “blood under the scalp of a newborn; caused by pressure during birth”Erb’s palsy “paralysis of the arm caused by injury to the upper group of the arm's main nerves”cerebral, neurological, or motor problems
41 If a large fetus is suspected, the maternal pelvis should be evaluated carefully. Fetal size can be estimated by palpating the crown-to-rump length of the fetus in utero and by ultrasound or x-ray pelvimetry. As an emergency measure the MD may ask the nurse to assist the woman into the McRoberts maneuver (sharp flexion of the thighs toward the hips and abdomen) or to apply suprapubic pressure in an attempt to aid in the delivery of the fetal shoulders. Fundal pressure should never be used since it can further wedge the anterior shoulder under the symphysis pubis.Monitor FHR – Early decelerations (caused by fetal head compression) could mean size disproportion at the bony inlet. Lack of fetal descent is another indicator that the infant is too large for a vaginal birth.Monitor for PP hemorrhage – the overstretching of the uterus may lead to contractile problems during labor and after birth. After birth, the overstretched uterus may not contract well (uterine atony) and will feel boggy (soft). In this case, uterine hemorrhage is likely. The fundus of the uterus is massaged to stimulate contraction, and IV or IM Pitocin may be needed. Maternal vital signs are closely monitored for deviation suggestive of shock.Monitor for cephalhematoma (subcutaneous swelling containing blood found on the head of an infant several days after birth; it usually disappears within a few weeks to 2 months), Erb’s palsy (Paralysis of the arm and chest wall as a result of a birth injury to the brachial plexus or a subsequent injury to the fifth and sixth cranial nerves), as well as cerebral, neurological, or motor problems.
42 Multiple Gestation Twins 30:1000 DizygoticMonozygoticIncidence increasing with use of infertility drugsMaternal ImplicationsPhysical discomforts, UTI, PIH, preterm labor, and placenta previa, uterine dysfunction, prolapsed cord, hemorrhageFetal ImplicationsDecreased intrauterine growth rate, increased incidence of fetal anomalies and cerebral palsy, prematurity, and abnormal presentations
43 In part due to advances in fertility treatments, the incidence of twins in the US has increased by 59% since 1980, to 30.1 per 1000 live births. The incidence of spontaneous twins varies, but is highest in African American women of greater age and parity, and women who are tall and overweight. The incidence is low in the Asian population.Dizygotic – Derived from two separate zygotes (fraternal twins)Monozygotic – Derived from one fertilized ovum (identical twins)Clues to multiple gestation pregnancy –visualization of two gestational sacs at 5 to 6 weeksfundal heights greater than expected for the length of gestationAuscultation of heart rates that differ by at least 10 beats per minute
44 Maternal implications – Physical discomforts range from physical discomfort, shortness of breath, backaches, and pedal edema. PIH( Pregnancy induced hypertension). Placenta previa ( a placenta which develops in the lower uterine segment, in the zone of dilatation, so that it covers or adjoins the internal os; painless hemorrhage in the last trimester, particularly during the eighth month, is the most common symptom. In a woman who has delivered twins, the uterus has been stretched more than the average pregnancy. The over stretching may lead to contractile problems during and after birth which may lead to postpartum hemorrhage.Fetal Implications – the perinatal mortality rate is approximately 10 times greater for twins than for a single fetus, and the morbidity rate is 5 times higher. The perinatal mortality rate for monoamniotic siblings has been estimated to be as high as 50 – 60%.
51 Clinical Therapy Frequent prenatal visits Serial ultrasounds to monitor for IUGRNST, BPP, and Doppler ultrasoundNutrition counselingClose monitoring IntrapartallyCesarean SectionElectronic Fetal Monitoring of FHR
52 Testing usually begins at 30 to 34 weeks’ gestation. NST ( nonstress test) and BPP (biophysical profile – assessment of five variables in the fetal risk; breathing movement, body movement, tone, amniotic fluid volume, and fetal heart rate reactivity). BPP results of 8 or better for each fetus is considered reassuring.A weight gain of 40 to 50 lbs, with a 15 to 20 lb weight gain by 20weeks, has been recommended fro women with multiple gestation pregnancy.
53 Fetal Distress – Nonreassuring Fetal status O2 supply insufficient for the physiologic demands of the fetusContributing FactorsCord CompressionUteroplacental InsufficiencyWarning SignsMeconium stained amniotic fluidOminous FHR patterns – late decelerations or prolonged decelerations, persistent severe variable decelerationsWhen oxygen supply is insufficient to meet the physiologic needs of the fetus, a nonreassuring fetal status may result. If the resulting hypoxia persists and metabolic acidosis occurs, the situation could cause permanent damage to or be life threatening for the fetus.
54 Clinical Therapy – Intrauterine resuscitation Turn to left lateral positionIntravenous fluids or incrDiscontinue PitocinAdminister oxygen via face maskProvide emotional supportKnee to chest to help Fetal HR (FHR)
55 When these patterns are detected, intrauterine resuscitation (corrective measures used to optimize the oxygen exchange within the maternal-fetal circulation) should be started without delay. Treatment of maternal hypotension involves having the woman turn to a left lateral position, start IV infusion or increase the flow rate if an infusion is already in place, or, if cord prolapse is suspected, having the woman assume a knee-chest position. Position changes that result in an increase in the fetal heart rate should be maintained. A vaginal exam should be performed to attempt to detect a prolapsed cord. Uterine activity can be decreased by discontinuing IV Pitocin administration or administering terbutaline to decrease contractions. Oxygen is also administered to the woman via face mask.
56 Placental Problems Abruptio Placentae Placenta abruptio is the separation of the placenta from the inner wall of the uterus before the baby is delivered.Placenta Previa- antepartum problemWhere the placenta is implanted in the lower part of the uterus obstructing vaginal birth
57 Abruptio PlacentaePremature separation of placenta from the uterine wallCause unknownMore frequent with PIH and Cocaine abuseDivided into three typesMarginal – edgesCentral - centrallyComplete – total separationS & S – sudden, dark blood, severe abdominal pain, rigid abdomen
58 The premature separation of a normally implanted placenta from the uterine wall. Premature separation is considered a catastrophic event because of the severity of the resulting hemorrhage. The incidence of abruptio placentae is approximately 1 in 100 births and occurs more frequently in pregnancies complicated by hypertension and cocaine abuse.Some proposed theories –decreased blood flow to the placenta through the sinuses during the last trimester.excessive intrauterine pressure caused by multiple gestation pregnancy, hypertension, cigarette smoking, alcohol ingestion, increased maternal age and parity, trauma, domestic violence, nonvortex presentation and sudden changes in intrauterine pressure (as in amniotomy).
59 Types:Marginal placenta separates at it edges, the blood passes between the fetal membranes and the uterine wall, and blood escapes vaginally.Central placenta separates centrally, and the blood is trapped between the placenta and the uterine wall. Entrapment of the blood results in concealed bleeding. In severe cases of central abruptio placentae, the blood invades the myometrial tissues between the muscle fibers. This occurrence accounts for the uterine irritability that is a significant sign of abruptio placentae. If hemorrhage continues, eventually the uterus turns entirely blue because the muscle fibers are filled with blood. After birth the uterus contracts poorly and frequently a hysterectomy is necessary.Complete massive vaginal bleeding is seen in the presence of total separation.Signs and Symptoms – Extreme tenderness of abdomen, rigid and boardlike abdomen, and increase in the size of the abdomen
63 Implications and Treatment MaternalHemorrhageRenal failure b/c of shockVascular spasmIntravascular clottingFetalAnemiaHypoxiaDeathBirth by Cesarean Section (safest)Hysterectomy in some cases
64 Large amounts of thromboplastin are released into the maternal blood supply. This thromboplastin in turn triggers the development of DIC and resultant hypofibrinogenemia. Fibrinogen levels, which are ordinarily elevated in pregnancy, may drop in minutes to the point at which blood will no longer coagulate. Because of the risk of DIC, evaluating the results of coagulation tests is imperative. In DIC, fibrinogen levels and platelet counts usually decrease; prothrombin times and partial thromboplastin times are normal to prolonged. Type and crossmatch blood for transfusion.Renal failure is due to shockFetal implications:Perinatal mortality associated with abruptio placentae ranges from 25 – 35%. In severe cases in the infant mortality rate is near 100%. The rate of survival is highest in fetuses who are delivered within 20 minutes of initial separation.Cesarean birth is safest.If the separation is mild and the pregnancy is near term, labor may be induced and the fetus born vaginally with as little trauma as possible. If rupture of membranes and Pitocin do not initiate labor, a C-section is required. A long delay would raise the risk of increased hemorrhage.
65 Placenta Previa Placenta implanted in lower uterine segment Uterine contractions cause placental villi to tear away from uterine wall causing bleedingImplicationsHypoxiaAnemiaS & S – slowly progressive, bright red blood, pain only during labor, soft and relaxed abdomen
66 This implantation may be on a portion of the lower segment or over the internal cervical os. As the lower uterine segment contracts and dilates in the later weeks of pregnancy, the placental villi are torn from the uterine wall, thus exposing the entire uterine sinuses at the placental site.Types:Total the internal os is coveredPartial the internal os is partially coveredMarginal the edge of the placenta is coveredLow-lying the placenta is implanted in the lower uterine segment in close proximity to but not covering the os.Cause is unknown. Statistically it occurs in about 4 per 1000 births.
70 Clinical Therapy Bed rest with BRP No vaginal exams Monitor blood loss and uterine contractilityMonitor FHR and Maternal VSIV fluidsT & C 2 units of bloodMaintain pregnancy until 37 weeks if stableInduction of labor if bleeding stable; C/Section if unstableThe goal of medical care is to identify the cause of bleeding and to provide treatment that will ensure birth of a mature newborn.No vaginal exams – Vaginal exams should never be performed on a woman with bleeding since the examiner’s fingers could perforate the placenta if cervical dilatation has occurred.
71 Prolapsed Umbilical Cord Umbilical cord precedes the fetal presenting part; becomes compresses between presenting part and maternal pelvisImplicationsEmotional distressFetal distressFetal deathTreatment – remains horizontal until head is engaged, examiner’s gloved fingers must remain in vagina to provide firm pressure on fetal head, oxygen via face mask, assume knee-chest position, emergency Cesarean Section
73 Amniotic Fluid-Related Complications Amniotic Fluid EmbolismHole & amnotic fluid goes into circulatory system- Mortality results. 50% die in 1hr.Polyhydramniostoo much amniotic fluid. >2000mlOligohydramniostoo little amniotic fluid. <500ml
74 Amniotic Fluid Embolism – A rare and often fatal event characterized by the sudden onset of hypotension, hypoxia, and coagulopathy. Amniotic fluid containing particles of debris (e.g. Hair, skin, vernix, or meconium) enters the maternal circulation and obstructs the pulmonary vessels, causing respiratory distress and circulatory collapse. The incidence is approximately 1 case per 8000 to 80,000 pregnancies and carries a maternal mortality rate as high as 80% (Schoening, 2007).Polyhydraminios – Also known as hydramnios is a condition in which there is too much amniotic fluid (more than 2000 ml) surrounding the fetus between 32 and 36 weeks. It occurs in approx. 3% of all pregnancies and is associated with fetal anomalies of development. It is associated with poor fetal outcomes because of the increased incidence of preterm births, fetal malpresentation and cord prolapse (Rajiah, Banerjee, 2007).Oligohydramnios – A decreased amount of amniotic fluid (less than 500ml) between 32 and 36 weeks’ gestation. It occurs in 5 – 8% of all pregnancies. May result from any condition that prevents the fetus from making urine or blocks it from going into the amniotic sac. This condition puts the fetus at an increased risk of perinatal morbidity and mortality. Reduction in amniotic fluid reduces the ability of the fetus to move freely without risk of cord compression.
75 Amniotic Fluid Embolism Amniotic fluid enters maternal circulation through small tear in chorion or amnionS & S – sudden onset of dyspnea, cyanosis, cardiovascular collapse, shock and comaTreatment – Oxygen with positive pressure, IV line, CPR, Blood transfusion, CVP line
76 Normally, amniotic fluid does not enter the maternal circulation because it is contained within the uterus, sealed off by the amniotic sac. An embolus occurs when the barrier between the maternal circulation and the amniotic fluid is broken and amniotic fluid enters the maternal venous system via the endocervical veins, the placental site (if the placenta is separated), or a site of uterine trauma. As many as 50% of women die within the first hour after the onset of symptoms. And about 85% of survivors have permanent hypoxia-induced neurological damage (Moore, 2006).No test can diagnose and amniotic fluid embolism. Nursing assessment skills are critical. Clinical appearance varies, but most woman report difficulty breathing, hypotension, cyanosis, seizures, tachycardia, coagulation failure, disseminated intravascular coagulation, pulmonary edema, uterine atony with subsequent hemorrhage, adult respiratory distress syndrome, and cardiac arrest (Moore and Ware, 2007).Nursing Interventions- inotropic agents to maintain cardiac output and blood pressure. Control hemorrhage – Oxytocin to control uterine atony and bleeding, seizure precautions, and administration of steroids to control inflammatory response.
77 Polyhydramnios More than 2000 cc’s of amniotic fluid Associated with major congenital anomaliesFetal swallowing of amniotic fluid is impairedImplications – shortness of breath, edema from compression of vena cava, abruptio placenta, postpartum hemorrhage, preterm birth, prolapsed cordTreatment – if severe can remove by amniocentesisDuring the second half of a normal pregnancy, the fetus begins to swallow and inspire amniotic fluid and to urinate, which contributes to the amount of amniotic fluid present. However, polyhydramnios is associated with fetal malformations that affect the fetal swallowing mechanism and neurological disorders in the fetal meninges are exposed in the amniotic sac. This condition is also found in cases of anencephaly, in which the fetus is thought to urinate excessively due to overstimulation of the cerebrospinal centers.
78 OligohydramniosAmount of amniotic fluid is severely decreased and concentratedMore frequent with postmaturity, IUGR, fetal renal malformationsImplicationsDysfunctional labor, fetal skin and skeletal anomalies, pulmonary hypoplasia, umbilical cord compressionTreatment – amnioinfusion, continuous fetal monitoring
79 As long as fetal well-being is demonstrated with frequent testing, no intervention is necessary. If fetal well-being is compromised, birth is planned along with amnioinfusion (the transvaginal infusion of crystalloid fluid to compensate for the lost amniotic fluid). The fluid is introduced into the uterus through an intrauterine pressure catheter. The infusion is administered in a controlled fashion to prevent overdistention of the uterus. Amnioinfusion is thought to improve abnormal fetal heart rate patterns, decrease c-sections, and possibly minimize the risk of neonatal meconioum aspiration syndrome (Norwitz & Schorge, 2006).Pulmonary hypoplasia – underdevelopment of the lungs.
80 Cephalopelvic Disproportion Baby is larger than the pelvic diameters or the baby is in an abnormal position or presentationMaternal/Fetal ImplicationsProlonged labor, uterine rupture, necrosis of maternal soft tissues resulting in fistulas to other nearby structuresProlapsed cord, excessive molding of head, traumatic forceps-assisted birthTreatment – Trial of Labor, Cesarean Section
81 The birth passage includes the maternal bony pelvis, beginning at the pelvic inlet and ending at the pelvic outlet, and the maternal soft tissues within these anatomic areas. A contracture (narrowed diameter) in any of the described area can result in CPD if the fetus is larger that the pelvic diameters. The pelvic inlet is contracted if the shortest anterior-posterior diameter is less than 10 cm or the greatest transverse diameter is less than 12 cm.Membrane rupture can result from the force of the unequally distributed contractions being exerted on the fetal membranes. In obstructed labor, in which the fetus cannot descend, uterine rupture can occur. With delayed descent, necrosis of maternal soft tissues can result from pressure exerted by the fetal head. Eventually, necrosis can cause fistulas from the vagina to other nearby structures.If the membrane rupture and the fetal head has not entered the inlet, there is a danger of cord prolapse. Excessive molding of the fetal head can result. Traumatic, forceps-assisted birth can damage the fetal skull and central nervous system.
82 Retained Placenta Retention of placenta beyond 30 minutes after birth Excessive bleedingManual removal (flush/hand)Removal with curettageOccurs in 2-3% of all vaginal births. Bleeding as a result of a retained placenta can be excessive. If placental expulsion does not occur, a manual removal of the placenta is attempted. In woman who have not had an epidural, intravenous sedation may be required because of the discomfort caused by the procedure.
83 LacerationsFirst Degree - fourchette, perineal skin, and vaginal mucous membraneSecond Degree – perineal skin, vaginal mucous membrane, underlying fascia, and muscles of the perineal bodyThird Degree - perineal skin, vaginal mucous membrane, underlying fascia, and muscles of the perineal body, and involves the anal sphincterFourth Degree – same as the 3rd degree but extends through the rectal mucosa to the lumen of the rectumLacerations should always be suspected in the face of a contracted uterus with bright red blood continuing to trickle out of the vagina.
84 Placenta AccretaChorionic villi attach directly to the myometrium of the uterusTwo other typesPlacenta increta – myometrium is invadedPlacenta percreta – myometrium is penetratedMaternal hemorrhageAbdominal HysterectomyThese placental abnormalities, although rare, carry a very high morbidity and mortality rate, possibly necessitating a hysterectomy at delivery. The incidence of placenta accreta is 1 in 2500 cases (Cunningham, 2001).