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PubMed1989

Vaginal delivery after cesarean section.

We retrospectively analyzed 194 pregnancies in women with a history of previous cesarean section (CS) who were offered a trial of labor. We offered every woman a trial of labor as long as she did not have a known previous classical scar. One hundred fifty-one women delivered vaginally (79%), 24 women had multiple uterine scars. Multiple gestations and breech presentation were not considered a sole indication to perform CS. Fetal and maternal morbidity are presented. We conclude that women with multiple previous CS scars can safely deliver vaginally as can women with unknown uterine scars, with careful intrapartum surveillance. Although our numbers of women with breech presentation and multiple gestations are small, in the absence of significant morbidity, we continue to allow these women to labor and deliver vaginally.

Cesarean Section↗
PubMed2004

Modified Bishop's score and induction of labor in patients with a previous cesarean delivery.

OBJECTIVES: The purpose of this study was to evaluate the association between preinduction modified Bishop's score and obstetric outcome, including successful vaginal birth after prior cesarean (VBAC) and uterine rupture in patients with a previous cesarean undergoing induction of labor. STUDY DESIGN: Medical records of all patients who had an induction of labor after a previous cesarean in our institution between 1988 and 2002 were reviewed. Patients were divided into 4 groups according to the modified Bishop's score (0 to 2, 3 to 5, 6 to 8, and 9 to 12). The rates of successful VBAC, symptomatic uterine rupture, and other obstetric outcomes were evaluated in each group. Multivariate regression analyses were performed to adjust for confounding factors. RESULTS: Out of 685 women included in the study, 187 (27.3%) had a modified Bishop's score <2, 276 (40.3%) of 3 to 5, 189 (27.6%) of 6 to 8, and 33 (4.8%) of 9 to 12. The rate of successful VBAC significantly correlated with the modified Bishop's score (57.5%, 64.5%, 82.5%, and 97.0%, respectively, P < .001). However, the rate of uterine rupture was not statistically significant between the groups (2.1%, 1.8%, 0.5%, 0.0%, P=.48). After adjusting for confounding variables, a modified Bishop's score >/=6 remained associated with successful VBAC (odds ratio [OR] 2.07, 95% CI 1.28-3.35, P < .001). CONCLUSION: The modified Bishop's score before induction of labor is an independent factor associated with successful VBAC.

Adult↗
PubMed1998

First delivery after cesarean delivery for strictly defined cephalopelvic disproportion.

OBJECTIVE: To examine the outcome of trial second labor after a first cesarean performed because of cephalopelvic disproportion, defined according to strict diagnostic criteria. METHODS: Obstetric details of nulliparous women delivering at 37 or more weeks' gestation by cesarean for cephalopelvic disproportion, between 1975 and 1990, were recorded prospectively. The diagnostic criteria for cephalopelvic disproportion were cervical dilation arrested after 5 cm, unresponsive to oxytocin augmentation, after active dilatation of 2 cm or more in 2 hours. Fetal malpresentations and malpositions were excluded. The outcome of next delivery in our hospital by each woman enrolled was then examined. RESULTS: Eighty-four of 42,793 women met the criteria for disproportion, and 40 with cephalic presentations delivered their next baby in our hospital. All 40 underwent a trial of labor and 27 (68%) delivered vaginally, comprising seven (47%) women with larger second and 20 (80%) with smaller second babies. Of 15 women previously delivered by cesarean at full dilatation, 11 (73%) delivered vaginally with no serious maternal or neonatal morbidity. CONCLUSION: The strictly defined diagnosis of nulliparous cephalopelvic disproportion should not constitute an automatic "recurrent" indication for elective cesarean delivery, because 68% of patients in our series had successful vaginal deliveries in their next pregnancies. This rate is similar to those reported after all nulliparous cesareans for dystocia.

Cesarean Section↗
PubMed2001

Mode of delivery for the morbidly obese with prior cesarean delivery: vaginal versus repeat cesarean section.

OBJECTIVE: We sought to describe the peripartum outcome of women weighing >300 pounds (135 kg) who were candidates for trial of labor after a prior cesarean delivery. STUDY DESIGN: All pregnant women who weighed in excess of 300 pounds and had a prior cesarean delivery were included in this prospective investigation. Student t test, chi(2) analysis, or Fisher exact tests were used. Odds ratios and 95% confidence intervals were calculated. P <.05 was considered significant. RESULTS: During a 2-year period, 69 patients met the inclusion criteria; 39 (57%) underwent an elective repeat cesarean delivery, and 30 (43%) women attempted a vaginal delivery after prior cesarean delivery. The demographics of age, race, gravidity, maternal weight, and preexisting medical conditions were similar for the two groups. Vaginal birth after prior cesarean delivery occurred in 13% (4/30). Reasons for failure included a labor arrest disorder in 46%, fetal distress in 38%, and failed induction in 15%. The rates of endometritis and wound breakdown were higher in the women undergoing trial of labor (30% and 23%, respectively) than in those undergoing repeat elective cesarean delivery (20% and 8%). The combined infectious morbidity rate was significantly higher for women attempting trial of labor (53%) than those undergoing elective repeat cesarean delivery (28%; odds ratio 1.78, 95% confidence intervals 1.05, 3.02). CONCLUSION: The success rate for a vaginal delivery in the morbidly obese woman with a prior cesarean delivery is less than 15%, and more than half of the patients undergoing a trial of labor have infectious morbidity.

Adult↗
PubMed2006

Results of a well-defined protocol for a trial of labor after prior cesarean delivery.

OBJECTIVE: It has been claimed that a trial of labor after cesarean carries higher maternal and fetal risks than planned cesarean delivery. Because the management of such patients in our department differs from that described in some studies, and is perhaps more cautious, we hypothesized that the outcome may be better. METHODS: We identified women with 1 previous low uterine segment cesarean who had delivered a cephalic singleton infant at gestational age 34 weeks or more from January 2000 through May 2005. Our policy is to encourage such women to undergo a trial of labor unless cesarean delivery is indicated. Unless otherwise indicated, our policy is to wait for spontaneous labor. We do not use prostaglandins, and recommend cesarean delivery if the cervix is unripe.(Bishop score < 6). We compared the outcome between women who underwent a trial of labor and women who underwent planned cesarean delivery. RESULTS: A trial of labor was attempted by 841 women (80% successful), and 467 underwent planned cesarean delivery. Uterine rupture was observed in 1 woman 18 hours after vaginal delivery. There was no difference in major or minor maternal morbidity. There was no serious neonatal morbidity. Among the planned cesarean patients, hospital stay was longer, and there were more admissions to the neonatal intensive care unit. CONCLUSION: With our well-defined protocol, a trial of labor after cesarean seems to be as safe for the mother and infant as planned cesarean delivery, and the hospital stay is shorter. LEVEL OF EVIDENCE: II-2.

Adult↗
PubMed1994

Trial of vaginal birth following cesarean section for arrest disorders of labor: analysis of patients with well-documented medical records.

We elucidated several controversial problems surrounding the vaginal trial in patients with prior abdominal delivery under the diagnosis of failure to progress or cephalopelvic disproportion, by conducting a prospective 6-year survey on the basis of patients who underwent prior operation for arrest disorders of labor (ADL). Of 45 full-term women who were defined as patients of prior ADL following a review of their past medical records, 28 patients underwent trial of labor and 75% (21/28) were successfully delivered of their infants vaginally. The seemingly critical determinants as to whether or not a vaginal birth is successful are the difference in neonatal weights between prior and current pregnancies as well as the difference between maternal obstetric conjugate and fetal biparietal diameter. These data suggest that patients who underwent prior cesarean section for indications of ADL have a high chance of safely succeeding if given a trial of labor under certain exclusionary criteria.

Adult↗
PubMed2000

Emergency postpartum hysterectomy in obstetric practice.

OBJECTIVES: To review cases of emergency postpartum hysterectomies performed in the setting of life-threatening hemorrhaging. METHODS: A retrospective study of 17 patients who underwent postpartum hysterectomies during January 1, 1985-December 31, 1998 was undertaken. Maternal characteristics, method of delivery, antenatal complications for hysterectomy, obstetric history, placental location, blood loss before hysterectomy and during operation, intraoperative and postoperative complications, and operative procedures were investigated, as was whether prostaglandin F2alpha and/or oxytocin were administrated during labor. The operative procedures also were examined. RESULTS: The incidence was 1 in 6,978 deliveries (0.014%). All patients were transported from affiliated clinics. The leading cause for a hysterectomy was uterine rupture (35.3%), followed by disseminated intravascular coagulation (DIC) due to placental abruption (29.4%), and uterine atony (23.5%). Failure of internal iliac-artery ligation occurred in 7 patients. CONCLUSIONS: Internal iliac-artery ligation is not effective for patients with massive blood loss. In such cases, it is desirable for the private physician to make an early decision for maternal transport.

Adult↗
PubMed1998

Partogram action line study: a randomised trial.

OBJECTIVE: To assess the effect of three different partograms on caesarean section and maternal satisfaction. DESIGN: Prospective randomised clinical trial. SETTING: Regional teaching hospital in North West of England. PARTICIPANTS: Nine hundred and twenty-eight primigravid women with uncomplicated pregnancies who presented in spontaneous labour at term. INTERVENTIONS: The women were randomised to have their progress of labour recorded on a partogram with an action line 2, 3 or 4 hours to the right of the alert line. If the progress reached the action line, a diagnosis of prolonged labour was made. Prolonged labour was managed according to the standard ward protocol. MAIN OUTCOME MEASURES: Primary: Caesarean section rate and maternal satisfaction; secondary: need for augmentation, duration of labour, analgesia, cord blood gas analysis, postpartum haemorrhage, number of vaginal examinations, Apgar score and admission to special care baby unit. RESULTS: Caesarean section rate was lowest when labour was managed using a partogram with a 4-hour action line. The difference between the 3- and 4-hour partograms was statistically significant (OR 1 8, 95% CI 1.1-3.2), but the difference between 2 and 4 hours was not (OR 1.4, 95% CI 0.8-2.4). The women in the 2-hour arm were more satisfied with their labour when compared to the women in the 3-hour (P < 00001) and 4-hour (P <00001) arm. CONCLUSION: Our data suggest that women prefer active management of labour. It is possible that partograms which favour earlier intervention are associated with higher caesarean section rate. As the evidence on which to base the choice of partograms remains inconclusive further research is required.

Cesarean Section↗
PubMed1990

The influence of maternal height, obstetrical conjugate and fetal birth-weight in the management of patients with breech presentation.

The value of erect lateral X-ray pelvimetry for selecting patients for a safe trial of vaginal delivery was assessed in a retrospective study of 424 women with a breech presentation. A trial labour was more often allowed in women with larger inlet conjugate measurements and the chance of successful vaginal delivery was better with larger pelvic measurements. However, there was no absolute level of pelvic contraction below which vaginal delivery was impossible. The size of the fetus did not determine the rate of planned elective Caesarean section. A fetus weighing greater than 3,500 g, had less than 50% chance of vaginal delivery. It is suggested that antenatal assessment of fetal size should be considered in patients with breech presentation before deciding on the mode of delivery.

Birth Weight↗