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The blade can be either fenestrated-meaning the body of the blade is hollow-or solid to prevent fetal head compression allergy medicine with pseudoephedrine purchase 20 mg prednisolone. There are more than 60 different types of obstetric forceps described in the literature, but most of are not used currently. The forceps used most commonly today are described in Table 15-1, along with their indications for use and the variations in anatomy, which distinguish one from the other. It is true that the use of this instrument, if not performed carefully or appropriately, can have serious consequences. Nevertheless, with properly trained hands, and a proper appreciation of its use, forceps can be lifesaving for both mother and fetus. Often in difficult or challenging labors, significant caput can lead to the false impression that fetal station is lower than it actually is. For this reason, the obstetrician must be confident that the actual biparietal diameter has passed the pelvic inlet and that the leading part of the fetal skull is beyond the level of the ischial spines. In addition, when the presentation is occiput posterior, the leading point of the fetal skull may appear to be lower in the pelvis although the biparietal diameter has not yet passed through the pelvic inlet; this can also lead to an erroneous conclusion about fetal station. When the forceps are properly applied, the sagittal suture must be exactly midway between the blades, and the lambdoidal sutures should be equidistant (usually one fingerbreadth) from the edge of the blade. If these conditions are not met, application of the forceps should be reconsidered. Outlet forceps-the fetal vertex is visible at the labia without manually separating them, and the fetal skull has reached the pelvic floor 2. Low forceps-the leading point of the fetal skull is greater than 2 cm beyond the ischial spines 3. Mid forceps-the fetal head is engaged and is beyond the level of the ischial spines; the forceps should be applied only if cesarean delivery is not quickly or imminently possible, and the fetus is in distress; or there should be a high likelihood that the forceps operation will be successful 4. The forceps are further divided into whether they are rotational (sagittal suture is >45 degrees from the midline) or nonrotational (sagittal suture <45 degrees from the midline). Maternal exhaustion or inability to push (endotracheal intubation with sedation or paralysis; neuromuscular disease) 2. Maternal contraindications to pushing (cardiopulmonary disease, cerebrovascular aneurysm) 4. Today, with the widespread availability of cesarean delivery, considerations turn to providing the best neonatal outcome possible; therefore the difficult forceps deliveries of the past have been abandoned. Nevertheless, forceps still play a crucial role in modern obstetrics, and if judiciously used can provide a safer alternative to cesarean delivery for both mother and baby. Furthermore, residency training in operative vaginal delivery has dramatically decreased over the past 30 years, potentially increasing fetal risk (Benedetto et al, 2007). The incidence of operative vaginal delivery in the United States is approximately 5% (1 in 20 deliveries), ranging from 1% to 23% with a 99% success rate (Menacker and Martin, 2008). The prevalence of forceps use varies widely by region (highest in the South), and recent estimates show that it accounts for approximately 25% (1:4 ratio with vacuum extractions) of all operative vaginal deliveries (Benedetto et al, 2006). Unfortunately, the prevalence of low, outlet, and mid-forceps (the application of forceps when the head is engaged but the leading point of the skull is more than +2 cm station) deliveries nationally is not known, nor is the rate of rotational and nonrotational forceps use. Moreover the indication for forceps use varies widely by clinical situation, and the neonatal morbidity that can result from a "difficult pull" in a patient with a transverse arrest with marked fetal asynclitism may be different from the quick delivery of a 2600-g fetus whose mother is unable to push, even if both deliveries are by low-forceps. Nevertheless, what large studies show that long-term and short-term neonatal morbidity from outlet or lowforceps delivery is uncommon In 2009, Prapas et al (2009) noted that the rate of vacuum- versus forceps-assisted deliveries had increased and that different maternal and neonatal outcomes have been proposed. The aim of their study was to compare the short-term maternal and neonatal outcomes between vacuum and forceps delivery. They conducted a medical record review of live born singleton, vacuum- and forceps-assisted deliveries. Of 7098 deliveries, 374 were instrument assisted, 324 were conducted by vacuum (86. The incidence of third-degree lacerations and periurethral hematomas was similar between vacuum and forceps (3. The rate of neonates with Apgar scores 6 at 1 min was significantly higher after forceps compared with vacuum delivery (18% vs. The rate of neonatal trauma and respiratory distress syndrome did not differ significantly between the two groups. The conclusion was that both modes of instrumental vaginal delivery are safe in regard to maternal morbidity and neonatal trauma (Prapas et al, 2009).

The finding was that this complication occurred most often in primigravidae allergy testing arm quality 5mg prednisolone, and that a large proportion of these infants (89. Yet as outlined previously, there are definite neonatal risks associated with the use of vacuum extraction. Food and Drug Administration has suggested that infants delivered with the vacuum have close monitoring for subgaleal or subaponeurotic hematoma, and that a high index of suspicion be maintained for this rare complication. It must be emphasized that the overall risk of adverse events attributable to the vacuum is extremely low, because the U. Food and Drug Administration estimated five serious complications per year of recent use during a time period when 228,354 vacuum deliveries were performed. However, it is likely that sequelae related to vacuum extraction often go underreported (Menacker and Martin, 2008). The choice of which instrument to use, forceps or vacuum, is usually determined by the obstetric care provider depending on the skill level and experience with either method. The Cochrane Library has pooled the results from 10 randomized trials comparing neonatal morbidity and successful vaginal delivery between these two devices (Roberts et al, 2002). However the overall serious complication rate was low, and there was no difference in long-term morbidity between groups (Johnson and Menon, 2003). The greatest danger in the use of either vacuum or forceps comes in the combination of both instruments together. Towner showed that the use of one instrument after the other had failed and carried a neonatal intracranial injury risk of 1 per 256, significantly greater than that of either modality alone (Learman, 1998). This finding was further supported by the work of Gardella et al, (2001), who matched 11,223 women (a third of whom had combined instruments, vacuum alone, or forceps alone, respectively) to an equivalent number of spontaneous vaginal deliveries. These investigators found no statistically significant difference in intracranial hemorrhage when a single instrument was compared to spontaneous vaginal delivery; however, the combined use of both instruments markedly increased the risk of intracranial hemorrhage, seizures, and low 5-minute Apgar scores (Ron-El et al, 1981). The overall risk of nerve and scalp injury was greater when single-instrument delivery was compared with spontaneous delivery, but the overall incidence of each complication is rare. The vacuum extractor is an acceptable instrument if used judiciously and in the proper circumstances, carrying an overall minimal risk of serious neonatal complications. Its safety is comparable to the obstetric forceps, although it has a higher incidence of cephalhematoma, but a lower potential for facial nerve injury. The chance of failure is greater with the vacuum, which could then potentially tempt the health care provider to subsequently use the forceps. The use of both forceps and vacuum after one instrument has failed carries a higher risk of adverse outcomes, and it should be undertaken only with an understanding of the higher likelihood of neonatal morbidity. The problem posed by this entity is that although it is highly anticipated, it is unpredictable and can appear despite the most cautious measures taken to prevent it. Shoulder dystocia is defined as the delivery of the fetal head with an impaction of the fetal shoulder girdle or trunk against the pubic symphysis, making subsequent delivery either difficult or impossible without performing auxiliary delivery maneuvers. In some cases the posterior shoulder may be lodged behind the sacral promontory-a bilateral shoulder dystocia. Once shoulder dystocia occurs, a series of maneuvers-which have never been tested in a prospective fashion, because of the sporadic and unpredictable nature of this complication-are used to resolve it. The first step is usually the McRoberts maneuver, which consists of hyperflexing the maternal thighs onto the abdomen. This maneuver flattens the pubic symphysis and sacral promontory and facilitates delivery of both the anterior and posterior shoulders. If unsuccessful, this maneuver is usually followed by suprapubic pressure to remove the anterior shoulder from its impacted state behind the pubic symphysis. If these two maneuvers fail, either rotational maneuvers or extraction of the posterior fetal arm are usually tried. It is often necessary to perform an episiotomy to have sufficient room in the vagina to accomplish this maneuver. An alternative maneuver to fetal manipulation is the all-fours position, or Gaskin maneuver. With this maneuver, the mother is moved from the lithotomy position to a hands and knees position. If the dystocia continues unresolved, the Zavanelli maneuver or cephalic replacement can be performed. After the fetal head is rotated from occiput transverse to occiput anterior, it is flexed and pushed back in the birth canal, and the child was delivered by emergent cesarean section. McRoberts maneuver, suprapubic pressure, or both will relieve greater than 50% of instances.

A proximal obstruction such as esophageal or duodenal atresia does not cause abdominal distension milk allergy symptoms 12 month old cheap prednisolone 40 mg amex, however. A sunken or scaphoid abdomen may be seen in the infant with respiratory distress caused by a diaphragmatic hernia. The umbilicus should be inspected for meconium staining, for signs of infection, and for the rare occurrence of pallor and edema or the visible discharge of urine caused by a patent urachus. At 1 or 2 days after birth, slight redness of the periumbilical skin is common, because of irritation from the cord clamp, and needs to be distinguished from an omphalitis or cellulitis. Counting of the umbilical vessels is best done in the delivery room, on the freshly cut cord. If the infant is asleep or resting quietly, it is prudent to auscultate for bowel sounds before proceeding to palpate the abdomen. Palpation should be initially gentle and superficial, to detect any signs of tenderness and the presence of an enlarged liver or spleen. In the healthy infant, the liver edge may be at or slightly above the right costal margin, or palpable 1 to 2 cm below. Gentle palpation of the lower abdomen can detect an enlarged bladder, which is the most common cause of a midline abdominal mass in neonates. Deep palpation to detect small masses or enlargement of the kidneys is most easily done soon after birth, before the infant has fed much, and when the infant is quiet. However, a satisfactory examination can be done even in a crying infant by keeping the fingers in position, and gradually increasing the depth of palpation each time the infant briefly relaxes the abdominal muscles while taking a breath between cries. It is helpful to support the flank with one hand while palpating for the kidney with the other, or to palpate with the thumb while supporting the flank with fingers of the same hand. Major neural tube defects and large masses such as a large sacrococcygeal teratoma will be detected prenatally or on initial inspection in the delivery room. In the routine examination, the lumbosacral area should be inspected carefully for the presence of deep or unusual dimpling of the skin over the sacrum, for sinus tracts, for unusual tufts of hair, and for small masses such as a lipoma or hemangioma, any of which may be associated with spina bifida occulta or tethering of the spinal cord. The spine is inspected for straightness and palpated for the integrity and alignment of the posterior spinous processes. The evaluation and management of the infant with ambiguous genitalia is discussed in Chapter 92. In both male and female infants, a soft swelling or bulge in the inguinal area may be due to an inguinal hernia. The bulge typically appears or increases in size during crying and is easily reduced with gentle pressure when the infant relaxes. The perineum is inspected to locate the anus and assess the tone of the anal sphincter. Absence of a normal anal opening should be detected as part of the initial evaluation in the delivery room. However, external observation of an apparently normal anus does not guarantee internal patency of the anus, which is best confirmed by the normal passage of meconium. The genitalia are mainly examined by inspection, supplemented by palpation, with the infant in a supine, frogleg position. In the newborn male, the foreskin normally covers the entire head of the penis, which is adherent to the glans. The urethral opening is usually hidden by the foreskin and need not be visualized if the foreskin is intact. The foreskin is typically incomplete if hypospadias is present, which allows the abnormal position of the urethral opening to be identified easily. Congenital chordee, a ventral angulation of the head of the penis, may accompany hypospadias or occur in isolation. Chordee can be missed unless the examiner straightens the penis by gently retracting the skin along the shaft towards the base of the penis. In infants who have a generous pad of subcutaneous fat at the base of the penis, this maneuver also helps to avoid a false impression that the penis is short.

The incidence of respiratory distress syndrome is lower in infants of mothers with preeclampsia who are delivered preterm than in those of age-matched controls without antenatal steroid exposure (Yoon et al allergy and asthma associates purchase cheap prednisolone online, 1980). Nonetheless, the morbidity of such infants is greater because of hypoxemic insults received in utero. Infants born to mothers with preeclampsia may also have thrombocytopenia or neutropenia, which further complicates their newborn course (Fraser and Tudehope, 1996). Although the absolute risk of seizure is low (1 in 2000 to 3000), the occurrence of seizures is unpredictable, and the efficacy of magnesium sulfate and margin of safety has been validated in multiple randomized trials (Duley et al, 2003). Blood pressure should be maintained in the mild preeclampsia range using intravenous antihypertensive agents (labetalol, hydralazine). Epidural anesthesia is indicated for pain control and to aid in blood pressure management. There is a considerable drop in the risk of eclampsia by 48 hours postpartum, with seizures occurring in less than 3% of women beyond that time. Most patients have antecedent features that are suggestive of preeclampsia, although in some cases eclampsia may occur without warning. If eclampsia is left untreated, repetitive seizures become more frequent and of longer duration, and ultimately status eclampticus develops. Maternal and fetal mortality may be as high as 50% in severe cases, especially if the seizures occur while the patient is far from medical care. Randomized controlled trials have demonstrated the clear superiority of magnesium sulfate for the treatment of eclampsia over all other anticonvulsants (Duley and Gulmezoglu, 2002; Duley and Henderson-Smart, 2002b, 2002c). Intravenous magnesium sulfate is given as a 4-g bolus over 5 minutes followed by a maintenance infusion of 1 to 2 g/hr for 24 hours after delivery. In refractory cases, second-line treatment with other anticonvulsants may be required, or the patient may have to be paralyzed and their lungs ventilated. Delivery after an eclamptic seizure should take place in a controlled, careful manner. There is little to be added by performing an emergency cesarean section (Coppage and Polzin, 2002). Vaginal delivery is possible in most cases, although cesarean delivery may be indicated if the status of the cervix is unfavorable or if fetal compromise is ongoing despite control of seizures and maternal stabilization. It affects approximately 1 in 2500 deliveries in the United States and may be much more common in developing countries, affecting as many as 1% of parturients. Gleason Substance abuse during pregnancy has been recognized as a problem for more than a century. Psychotropic substances, both legal (alcohol, cigarettes, and prescription drugs such as opioids and benzodiazepines) and illegal (opioids, amphetamines, cocaine, and marijuana), can cause obstetric, fetal, and neonatal complications. These complications include poor intrauterine growth, prematurity, abruptio placenta, fetal distress, spontaneous abortion, stillbirth, fetal (and maternal) cerebral infarctions and other vascular accidents, malformations, and neonatal neurobehavioral dysfunction. Although substance abuse occurs in all socioeconomic classes, illegal drug abuse is more frequently associated with unhealthy lifestyles, poor access to prenatal care, untreated health problems, poverty, stress, and psychological disorders. Because of these socioeconomic confounders as well as the confounders of polysubstance exposure and the influence of various postnatal environmental factors, it is often difficult to determine the effects of maternal use of one specific drug on the fetus and newborn. This chapter addresses the epidemiology of perinatal substance use and abuse; the effects of specific drugs on the fetus and newborn; maternal issues and their effects on the newborn; identification of pregnancies and babies at risk; neonatal management; and long-term effects and follow-up. The discussion will focus on abused substances that are known or suggested to be associated with significant perinatal and neonatal morbidity: alcohol, tobacco, nicotine, opioids, cocaine, marijuana, and methamphetamine. One of the most comprehensive geographically based prevalence studies on substance use and abuse by pregnant women was undertaken in California in the early 1990s by the Perinatal Substance Exposure Study Group (Vega et al, 1993). In that study, urine was collected at the time of delivery from more than 30,000 pregnant women. The authors concluded that if these results could be extrapolated to the United States at large, an estimated 450,000 infants per year (11% of 4 million live births) would be exposed to alcohol, illicit drugs, or both in the days before delivery. Rates of perinatal substance exposure have not changed substantially over the past 20 years, although there is wide geographic variation. Department of Health and Human Services Pregnancy Risk Assessment Monitoring System is designed to monitor maternal behaviors and experiences among women who deliver live-born infants.

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