Epidural analgesia during labor and incidence of cesarian section: prospective study

For many years the opportunity of reducing the pain of birth through the administering of drugs (e.g. local anesthetics and opioids) into the epidural space has been known.

Numerous studies have been conducted throughout the years to clarify whether the use of the epidural has resulted in a higher incidence of cesarean sections but it appears that this is due more to maternal–fetal factors than it is to the epidural.

In this study, we have outlined the experience of the Anesthesia and Intensive Care Unit of an Italian Children's Hospital in which approximately-2500 births take place every year and in which there is an active birth analgesia service which requires the presence of a dedicated anesthetist.     

Effect of early versus conventional epidural analgesia during labor on cytokine production

Abstract

Objective.?To compare the effect of early epidural analgesia (EEA) vs. conventional epidural analgesia (CEA) on cytokine production in mother and neonate.

Methods.?Healthy parturients with uncomplicated term pregnancies were randomized into two groups: EEA – parturients who would receive epidural analgesia before onset of pain and the control group, CEA – parturients who would receive epidural analgesia after onset of pain. Cytokines were measured in maternal blood at randomization Visual Analog Scale (VAS) < 30], 24 h postpartum, and in cord blood.

Results.?Forty-one women were studied. Epidural was performed in EEA when VAS was 23 ± 10 and in CEA when VAS was77 ± 10 (p < 0.0001). Background data were similar except for ruptured membranes at admission (EEA 15%, CEA 46.6%; p?=?0.03), transient hypotension (EEA 20%, CEA 0%; p?=?0.03), and meconium (EEA 25%, CEA 0%; p?=?0.01). No significant differences were found in cytokine levels between groups at any time. Interleukin (IL)-6 levels changed significantly only in the control group (p?=?0.046). There was significant correlation between baseline maternal IL-6 level and cord blood level in CEA (r?=?0.59, p?=?0.005), while no significant correlation existed in EEA (r?=?0.33, p?=?0.16).

Conclusion.?Although there was no significant difference in cytokine levels between the groups, EEA prevented the significant increase in IL-6 during labor and interrupted IL-6 fetal-maternal dependency.     

Outcomes of induced versus spontaneous labor

Purpose: Induced labor is associated with a higher request for analgesia than spontaneous labor. This study compared duration of labor, mode of delivery, quantity of blood loss, type of perineal outcome and neonatal outcomes between women in induced labor and women in spontaneous labor, both on epidural analgesia (administered at cervical dilation ≤?4?cm).

Methods: In a two-year longitudinal cohort study, data were gathered from nulliparous women with a single cephalic pregnancy of at least 37 weeks attending the labor and delivery ward in Policlinico San Matteo Fundation-Pavia. Data were compared for women with early labor analgesia in (1) spontaneous labor (Robson group 1) and (2) induced labor (dinoprostone – vaginal insert or gel, Robson group 2a).

Results: Of the 1104 women who underwent epidural analgesia in the study period, 531 were included: 326 in spontaneous labor and 205 in induced labor. The only significant difference found was duration of the first stage, which lasted 305 (200–390) min in spontaneous labor compared to 205?min (120–345) in induced labor (p <0.001).

Conclusions: In women on early epidural analgesia, induction is associated with a shorter duration of the first stage of labor and does not affect other outcomes.     

Labor induction just after external cephalic version with epidural analgesia at term

Objective

To analyze the benefits of external cephalic version (ECV) with epidural analgesia at term and labor induction just after the procedure.

Adverse obstetrical and neonatal outcomes in elective and medically indicated inductions of labor at term

Abstract

Objective: To compare the adverse neonatal and maternal outcomes after medically indicated and elective labor induction. Both induction groups were also compared to women with spontaneous onset of labor.

Method: Retrospective cohort study of 13?971 women with live, cephalic singleton pregnancies who delivered at term (from 1997 to 2007). Adverse maternal and neonatal outcomes were compared between women who underwent an induction of labor in the presence and absence of standard medical indications.

Results: Among 5090 patients with induced labor, 2059 (40.5%) underwent elective labor inductions, defined as inductions without any medical or obstetrical indication. Risks of cesarean or instrumental delivery, postpartum hemorrhage >500?ml, prolonged maternal hospitalization >6 days, Apgar<7 at 5?min of life, arterial umbilical cord pH<7.1, admission in neonatal intensive care unit (NICU) and prolonged NICU hospitalization >7 days were similar between nulliparous who underwent elective and medical labor induction. Similar results were obtained for multiparous. All the above mentioned risks, but the Apgar<7 at 5?min of life, were significantly increased after induction in comparison to spontaneous labor.

Conclusion: Elective induction of labor carries similar obstetrical and neonatal risks as a medically indicated labor induction. Thus, elective induction of labor should be strongly discouraged.     

Effect of epidural analgesia on labor and delivery: a retrospective study

Two groups of women have been retrospectively compared: 155 women who received analgesia and 1355 women who delivered without analgesia. The duration of the first stage, second stage, and total duration of labor was longer in epidural group, however epidural analgesia was not demonstrated as an independent risk factor for a prolonged labor. The variable most influencing the total duration of labor and the duration of the first stage was nulliparity; the variables most influencing the duration of the second stage were the older age, a reduced body mass index, a high newborn weight and nulliparity.     

Clinicians' guide to the use of oxytocin for labor induction and augmentation

Oxytocin is commonly used in obstetrics for labor induction and augmentation. Careful assessment of the individual clinical situation based on indications and contraindications is essential to enhancing safe and effective use. Counseling the woman and her partner regarding potential risks and benefits before use is necessary to promote informed consent. At least 39 weeks of gestation is required for elective labor induction. Recent research has shown that deferring elective induction until cervical readiness has been achieved without the use of pharmacologic agents can be beneficial in reducing the risk of cesarean birth associated with elective induction. A conservative physiologic oxytocin protocol for labor induction and augmentation is recommended to minimize the risk of side effects. Although treatment of excessive uterine activity related to oxytocin has not been studied prospectively, several interventions such as maternal repositioning, an intravenous fluid bolus, and discontinuation of the oxytocin infusion are beneficial in returning uterine activity to normal, based on retrospective review of oxytocin-induced tachysystole. Perinatal quality measures from the National Quality Forum and the Joint Commission can be useful in monitoring care related to induction of labor. These include elective births before 39 weeks of pregnancy and cesarean births for low-risk, first-birth mothers.     

Elective removal of cervical cerclage and onset of spontaneous labor

Objective

To determine the time interval between elective removal of cervical cerclage and onset of spontaneous labor.

Methods

A retrospective cohort study was conducted between January 2005 and December 2012 at a tertiary care hospital in Lisbon, Portugal. All singleton pregnancies with a McDonald or Shirodkar cerclage electively removed at 36–37 weeks were evaluated for the time interval between cerclage removal and spontaneous labor. Delivery within 72 hours after cerclage removal was compared between patients with elective cerclage and those with non-elective cerclage. In the non-elective group, a sub-analysis of the results for ultrasound- and physical examination-indicated cerclage was performed.

Results

Thirty-eight women were included. The time interval between cerclage removal and spontaneous labor did not differ significantly between the elective and the non-elective group (15.6 ± 7.6 vs 10.9 ± 7.4 days; P = 0.063). A higher incidence of delivery 72 hours after cerclage removal was seen in the non-elective group but this was not significant (P = 0.061). There were no differences regarding the time interval from elective removal of cervical cerclage to onset of spontaneous labor between ultrasound-indicated and physical examination-indicated cerclage.

Conclusion

Regardless of the indication for cervical cerclage, the probability of delivery soon after elective cerclage removal is low.     

Amniotic fluid interleukin-1 in spontaneous labor at term

The regulatory signals responsible for the increased biosynthesis of prostaglandins during parturition have not been established. Interleukin-1 (IL-1) is capable of stimulating prostaglandin production by intrauterine tissues and is an inflammation mediator. It has been postulated as a signal for the onset of labor in the setting of intrauterine infection. A study was designed to determine if spontaneous labor at term was associated with changes in IL-1 activity in amniotic fluid. Such fluid was retrieved from 41 women in labor and from 39 women who were not in labor at term. Immunodetectable IL-1 beta was present in 22 of the 41 women in labor but in only 8 of the 39 women without labor. IL-1-like bioactivity was not different between the two groups at a dilution of 1:4, but at dilutions of 1:12, 1:36 and 1:108, amniotic fluid from women in labor had significantly higher bioactivity than that from women not in labor. A significant correlation was found between the bioassay and immunoassay results. Our data show that inhibitors of IL-1 bioactivity are present in amniotic fluid and suggest that in a subset of laboring women at term, an inflammatory reaction may play a role in triggering the onset of parturition.     

Analgesic efficacy of intramuscular opioids versus epidural analgesia in labor.

OBJECTIVES: To compare analgesic efficacy of intramuscular opioids: meperidine and tramadol with epidural analgesia. METHODS: One hundred and twenty-eight term nulliparous women with singleton pregnancy and vertex presentation were randomized to receive either epidural (n=43), meperidine (n=39) or tramadol (n=44). A visual analog scale (VAS) was used to assess the severity of pain. The parameters analyzed were analgesic efficacy, effect on labor, other maternal side effects, perinatal outcome and maternal satisfaction. RESULTS: Median VAS scores following first dose were 0 (0-5), 5 (3-8) and 5 (3-8) in epidural, meperidine and tramadol groups, respectively. Ninety percent of women rated analgesia as good to excellent in the epidural group as compared with 72% of women in the meperidine group and 65% in tramadol group. However, epidural caused a significant prolongation of first (P<0.05) and second (P<0.01) stage of labor with an increased number of operative deliveries (27% in the epidural, 7.6% in the meperidine, and 11.4% in the tramadol groups, P<0.05). In the epidural group 40% women had urinary retention and 16% had motor weakness, whereas sedation was the only side effect seen in the meperidine (41%) and tramadol groups (9%). Respiratory depression was noted among three neonates in the meperidine group, two in the tramadol group and none in the epidural group. CONCLUSIONS: The analgesic efficacy and maternal satisfaction is better with epidural analgesia than with opioids. Analgesia provided by meperidine and tramadol is comparable and approximately 50% of women rated the analgesia as good. Meperidine is better in the second stage than tramadol. Hence in developing nations where availability of facilities is the main limiting factor, intramuscular opioids can be considered suitable alternatives.     

Congenital Uterine Anomalies and Uterine Rupture

Congenital uterine anomalies are more common than previously recognized. While many women will have no symptoms or problems, some women with congenital uterine anomalies have increased risks of adverse outcomes during pregnancy. This article presents a case study of a woman with a congenital uterine anomaly leading to spontaneous rupture of her unscarred uterus remote from term. The most common types of congenital uterine anomalies and their associated reproductive risks are reviewed. Evaluation of congenital uterine anomalies and management alternatives are discussed.     

Fetal and maternal temperatures during labor and delivery: a prospective descriptive study

Objective: The objective of this study is to study the fetal scalp temperature (FST) and maternal axillary temperature (MAT) during vaginal delivery relative to progression of labor, uterine contractions (UC) and epidural analgesia (EDA), and to construct normal temperature reference ranges related to stage of labor.

Material and methods: Temperatures were recorded continuously in labor of 132 women with a bi-metal temperature sensor attached to the axilla (MAT) and a similar sensor mounted in a scalp electrode (FST). The temperature data were stored electronically and analyzed offline at cervical dilatations of 2–3, 5, 7–8, and 10?cm, and at full retraction. The FST was read before, at increasing, at peak, at decreasing, and after UC. The MAT and FST curves were compared with mixed-effect models statistics for repeated measurements. A two-tailed p?<.05 was considered significant.

Results: The FST did not vary during UC (p?=?.24). Both FST and MAT increased linearly by progression of labor (both p?p?Conclusions: During UC, the FST showed no alteration. Both FST and MAT increased significantly by progression of labor, and significantly more in the presence of EDA. The presented normal temperature reference ranges can be used for future research.     

Mifepristone and misoprostol in the induction of labor at term.

OBJECTIVE: To assess the ability of mifepristone to prime the cervix adequately and induce labor in pregnant women at term; and when mifepristone alone proves insufficient, to determine whether oral misoprostol taken 48 h following mifepristone administration is effective in inducing labor. METHODS: In this prospective study 50 pregnant women at term with an unfavorable cervix were given 400 mg of mifepristone orally and allowed to return home. If labor did not start within 48 h, the women were admitted and induction was continued with 50 mug of misoprostol, a prostaglandin (PG) E1 analogue, taken orally every 4 h. The 50 controls, who were matched prospectively for parity and pregnancy duration, underwent labor induction according to the routine administration of 3-mg tablets of PGE2 vaginally. RESULTS: In the study group, 66% of the women entered labor spontaneously or had a sufficiently ripened cervix within 48 h of taking mifepristone. However, there was no difference in time between prostaglandin administration and delivery between the control group and the 34% of women who required misoprostol in the study group. In the study group, the cesarean section rate was significantly lower among the women whose labor was induced with mifepristone alone than among those who required misoprostol. There were no differences overall in obstetric or neonatal outcomes between the study and control groups. CONCLUSIONS: In this pilot sample, 400 mg of mifepristone was effective in inducing cervical changes and labor. Although there were no adverse effects using oral misoprostol in combination with mifepristone, labor was more difficult to induce in the women who did not respond to mifepristone alone, and these women had a higher operative delivery rate.     

Mechanical ileus in a pregnant woman at term pregnancy accompanied by labor pains

Intestinal obstruction in pregnancy is a rare, but serious complication of pregnancy with significant maternal and fetal mortality. We herein report a case of intestinal strangulation in a pregnant woman with a history of pelvic surgery due to an ectopic pregnancy. Epigastric pain occurred at term pregnancy with concomitant onset of labor pains. The epigastric pain disappeared transiently, and she gave a birth to a healthy child. However, the pain appeared again after the vaginal delivery. She immediately underwent ileo-ileostomy with a diagnosis of mechanical ileus, and the postoperative course was uneventful. Mechanical ileus should be considered when examining epigastric pain in a pregnant woman with a history of abdominal or pelvic surgery even after the onset of labor pains.