Use Of Elective Caesarean Section Research Articles

Hepatitis B in pregnancy

Chronic hepatitis B virus (HBV) infection affects about 350 million individuals worldwide. Management of HBV infection in pregnancy is difficult because of several peculiar and somewhat controversial aspects. The aim of the present review is to provide a tool that may help physicians to correctly manage HBV infection in pregnancy. This review focuses on (1) the effect of pregnancy on HBV infection and of HBV infection on pregnancy; (2) the potential viral transmission from mother to newborn despite at-birth prophylaxis with immunoglobulin and vaccine; (3) possible prevention of mother-to-child transmission through antiviral drugs, the type of antiviral drug to use considering their efficacy and potential teratogenic effect, and the timing of their administration and discontinuation; and (4) the evidence for the use of elective caesarean section vs vaginal delivery and the possibility of breastfeeding.

Prophylaxis and treatment of HIV-1 infection in pregnancy: Swedish Recommendations 2010

Prophylaxis and treatment with antiretroviral drugs and the use of elective caesarean section have resulted in a very low mother-to-child transmission of human immunodeficiency virus (HIV) during recent years. The availability of new antiretroviral drugs, updated general treatment guidelines and increasing knowledge of the importance of drug resistance, have necessitated regular revisions of the "Prophylaxis and treatment of HIV-1 infection in pregnancy" recommendations. For these reasons, The Swedish Reference Group for Antiviral Therapy (RAV) updated the 2007 recommendations at an expert meeting that took place on 25 March 2010. The most important revisions from the previous recommendations are: (1) it is recommended that treatment during pregnancy starts at the latest at gestational week 14-18; (2) ongoing efficient treatment at confirmed pregnancy may, with a few exceptions, be continued; (3) lopinavir/r and atazanavir/r are equally recommended protease inhibitors; (4) if maternal HIV RNA is >50 copies/ml close to delivery, a planned caesarean section, intravenous zidovudine, oral nevirapine for the mother and post-exposure prophylaxis for the infant with 3 antiretroviral drugs are recommended; (5) for delivery at <34 gestational weeks, intravenous zidovudine and oral nevirapine for the mother and at 48-72 h for the infant is recommended, in addition to other prophylaxis; (6) intravenous zidovudine is not recommended when HIV RNA is <50 copies/ml and a caesarean section is performed; (7) it is recommended that prophylaxis for the infant is started within 4 h; (8) prophylactic zidovudine for the infant may be administered twice daily instead of 4 times a day, as was the case previously; and (9) the number of sampling occasions for the infant has been decreased.

Mode of delivery decisions among HIV -infected mothers at an urban maternity hospital in Kenya

To quantify the use of elective Caesarean section (ECS) for prevention of mother-to-child transmission of HIV (PMTCT) at an urban Kenyan maternity hospital, to describe mode of delivery decision making among HIV positive women, and to understand patient knowledge and attitudes regarding ECS for PMTCT. Descriptive cross-sectional study. Pumwani Maternity Hospital, Nairobi, Kenya. Two hundred and fifty postpartum HIV-infected women. ECS delivery rate, correlates of mode of delivery decisions and ECS for PMTCT knowledge and attitudes The rate of delivery by ECS for PMTCT was 4.0% (10/250), though 13.6% (34/250) planned this mode of delivery. Patient education regarding ECS for PMTCT was limited, and 64% (160/250) of participants had never heard of ECS. Planning ECS for PMTCT was positively correlated with attending clinic at PMH (OR=9.12, 95% CI: 2.94-28.28, p<0.001), knowledge of ECS (OR=27.22, 95% CI: 5.04-148.20, p<0.001) and having a history of abdominal surgery (OR=30.96, 95% CI: 6.32-205.02, p<0.001). Delivering by ECS was associated with planning this mode of delivery (OR=19.52, 95% CI: 3.69-103.23, p<0.001). Planning but not delivering by ECS was mostly due to labour before scheduled ECS (55.6%, 15/27) or poor patient understanding of the intervention (29.6%,8/27). After education on ECS for PMTCT, 48.0% (120/250) of participants would consider elective Caesarean section if offered, though cost represented a significant barrier to acceptability. Knowledge and utilisation of ECS for PMTCT are limited and varied in this patient population. ECS may be an acceptable mode of delivery for some Kenyan women, especially if the burden of cost is removed. A clear policy on ECS counselling and utilisation is urgently needed to ensure consistent and appropriate use of this PMTCT intervention in Kenya.

Current trends in the management of heart disease in pregnancy

Background The management of heart disease in pregnancy is highly specialized. Guidelines are based on observational studies. This paper describes our experience of these patients, including adverse cardiac events, adherence to guidelines, and areas of suboptimal management. Methods Patients referred to the service between 01/05/1999 and 30/06/2005 were identified using clinic lists and keyword searches in databases. A list of 40 management standards was created from European Society of Cardiology and the Confidential Enquiry into Maternal and Child Health guidelines. Adherence to these was recorded and adverse cardiac events noted. Results There were 177 pregnancies in 155 women with a mean age of 28 ± 6 years. Service referrals increased linearly throughout the study period. Of 131 cardiac pregnancies 101 had congenital heart disease (77.1%). Pulmonary oedema, deteriorating functional class, sustained arrhythmia or cardiac intervention occurred in 13 pregnancies (10.2%), though not always in high risk cases. Management guidelines were largely followed, though areas of suboptimal management included lack of pre-conception advice and inadequate post-partum follow-up. Controversial areas include the use of β-blockade in coarctation of the aorta and the use of elective Caesarean section in high risk patients. Conclusions Cardiac pregnancies are increasing, mainly due to the rise in patients with congenital heart disease. Some patients will experience adverse cardiac events, including low risk patients. Pre-conception advice and post-partum follow-up should be improved. In the absence of prospective studies, management is likely to be driven by observational studies.

Prophylaxis and treatment of HIV-1 infection in pregnancy: Swedish Recommendations 2007

Prophylaxis and treatment with antiretroviral drugs, a consequent low viral load, and the use of elective Caesarean section, are factors that radically decrease the risk of HIV transmission from mother to child during pregnancy and delivery. The availability of new antiretroviral drugs, updated general treatment guidelines and increasing knowledge of the importance of drug resistance, have necessitated recurrent revisions of the recommendations for 'Prophylaxis and treatment of HIV-1 infection in pregnancy'. For these reasons, The Swedish Reference Group for Antiviral Therapy (RAV) has, at an expert meeting on May 4, 2007, once more updated the treatment recommendations of 1999, 2002 and 2005, which were defined in cooperation with the Swedish Medical Products Agency (Läkemedelsverket). This new text takes the recently updated general HIV treatment recommendations into account. Furthermore, the very low risk of HIV transmission when the mother is treated with combination antiretroviral therapy, has undetectable levels of viraemia and no obstetric risk factors, has been considered in the recommendations concerning the mode of delivery. Finally, the recommendations for monitoring of infants born to HIV-infected mothers have been modified. The recommendations are evidence graded in accordance with the Oxford Centre for Evidence Based Medicine, 2001 (see http://www.cebm.net/levels_of_evidence.asp#levels).

Perinatal mortality following umbilical cord prolapse

Umbilical cord prolapse which occurred in 0.6% of deliveries in 1932 now complicates only approximately 0.2% of deliveries. The reduced incidence probably reflects changes in obstetric practice especially the increased use of elective cesarean section (CS). Intrapartum CS in cases of noncephalic presentation and a more active intrapartum management of the very preterm fetus also account for the decreased incidence. This retrospective study was designed to determine the prevalence and perinatal outcome of deliveries complicated by cord prolapse at University College Hospital Ibadan Nigeria. A total of 78 cases of umbilical cord prolapse were recorded in the 16596 deliveries performed from January 1 1995 to December 31 2005 for a prevalence of 0.47%. When cord prolapse occurs immediate delivery should be performed if the fetus is sufficiently mature. Good antenatal care prompt hospital care if needed appropriate delivery mode and prompt and appropriate interventions when the delivery is vaginal are extremely important for perinatal and maternal outcome. (excerpt)

Higher rates of post-partum complications in HIV-infected than in uninfected women irrespective of mode of delivery.

To inform the debate on the use of elective caesarean section (CS) delivery in HIV-infected women, we investigated the occurrence of clinical events in the immediate post-partum period in women delivering in 13 European centres. Two separate matched case-control studies (vaginal and elective CS deliveries) among infected women (cases) and uninfected controls delivering between 1992 and 2002. The prevalence of minor and major post-partum complications was assessed overall for infected and uninfected women; within mode of delivery group (vaginal/CS) the complication rates of infected cases were compared with uninfected controls in a matched analysis. Overall complication rates were 29.2% (119 of 408) for HIV-infected women, 19.4% (79 of 408) for uninfected women, 42.7% (135 of 316) for CS deliveries and 12.6% (63 of 500) for vaginal deliveries. There were no major complications in women delivering vaginally; but, compared with controls, HIV-infected cases were at increased risk of puerperal fever [odds ratio (OR), 4.5; 95% confidence interval (CI), 1.55-13.07), especially after medio-lateral episiotomy. In the CS group, there were six major complications (five among cases, one control) (OR, 5.1; 95% CI, 0.58-45) and cases had an increased risk of minor complications (OR, 1.51; 95% CI, 1.22-2.41) compared with controls, mainly anaemia not requiring blood transfusion. HIV-infected pregnant women are at increased risk of post-partum complications regardless of mode of delivery, but modification of clinical practice, particularly use of prophylactic antibiotics, would reduce this risk. Infected women should be informed about risks of vertical transmission and post-partum complications, and be involved in mode of delivery decisions.

Trends in interventions to reduce perinatal human immunodeficiency virus type 1 transmission in North Carolina.

Mother-to-child transmission of HIV has decreased in industrialized countries because of widespread use of antiretroviral therapy (ART) by HIV-infected pregnant women and perhaps to increased use of elective cesarean section. We evaluated changes in the use of ART and mode of delivery among HIV positive pregnant women in North Carolina. We reviewed the medical records of HIV-exposed infants born in North Carolina between January 1, 1998, and December 31, 1999, who were tested for HIV DNA. These results were compared with data collected on HIV-exposed infants born from 1993 through 1997. The use of combination ART increased from 1.5% in 1996 to 73% in 1999. The most common ART was zidovudine/lamivudine (39%) followed by zidovudine-lamivudine-nelfinavir (34%), although 34 combinations were used. Elective cesarean sections in the state increased significantly from 16.5% in the first half of 1998 to 49.4% in the second half of 1999. Overall transmission rates declined from 24.5% in 1993 to an average of 10.6% in 1994 to 1996 (41 of 385) and to 3.5% in 1997 to 1999 (15 of 428). Increased use of combination ART and elective cesarean section was accompanied by consistently low rates of perinatal transmission. However, because perinatal transmission rates were also low among women who used combination therapy and had vaginal deliveries, it is difficult to determine how much additional benefit cesarean section affords. Most HIV transmission occurred among women who lacked prenatal care and did not receive or adhere to ART.

Twin delivery

The incidence of twin pregnancy has increased worldwide over the past 10 years largely as a consequence of the assisted reproductive technologies. Issues such as intrapartum monitoring and operative interventions, especially with regard to the second twin, provide a unique challenge in labour and delivery. Epidemiological data suggest that the term twin has a threefold higher mortality rate than the singleton. It is the authors' view that many aspects of twin delivery deserve as much import as those features of twin gestations such as pre-term birth and intrauterine growth restriction that, to date, have received much of the research and clinical interest in this area.Indications for elective Caesarean section are presented, incorporating new data derived from the delivery of the term singleton breech, and implications on the timing thereof are discussed.Vaginal delivery of both twins presenting by the vertex is recommended as safe as long as guidelines for the conduct of such delivery are followed. The recommended time interval between twins as well as the use of epidural, fetal monitoring and ultrasound in the delivery room are discussed.The second twin presenting as a non-vertex presents an urgent dilemma for accoucheurs. Data suggest that internal version and breech extractions are safer than external cephalic version provided that the appropriate techniques are applied. It is revealed, however, that the use of elective Caesarean section in this group of babies has not been subject to randomized controlled studies of sufficient power to determine the best method of delivery of the second twin – particularly in the low-birth-weight baby.

Prevention of perinatal HIV transmission during pregnancy.

Transmission of the human immunodeficiency virus (HIV) from mother to child can occur in utero, during labour or after delivery from breastfeeding. The majority of infants are infected during delivery. Maternal HIV-1 plasma viral load at delivery is the most important predictor of vertical transmission. For this reason, efforts to interrupt transmission have focused on the use of antiretroviral therapy. Zidovudine has been shown to reduce significantly vertical HIV transmission when used antepartum and intrapartum by the mother and postpartum by the newborn for 6 weeks. However, zidovudine monotherapy increases the risk of developing zidovudine resistance and may jeopardize the goal of durable viral suppression and allow HIV disease progression in the mother and transmission to the infant. Potent antiretroviral therapy is now recommended for all HIV-infected pregnant women using the same criteria for non-pregnant individuals. If possible, combination antiretroviral regimens should include the use of zidovudine but not at the expense of long-term viral suppression. The use of elective Caesarean section should probably be reserved for women who fail to achieve viral suppression at the time of delivery or if indicated for obstetrical reasons. The practice of breastfeeding has been shown to diminish the long-term efficacy of perinatal antiretroviral therapy. All HIV-infected mothers should avoid breastfeeding the newborn if possible. This review summarizes major prospective and retrospective antiretroviral treatment studies in HIV-infected pregnant women. Pharmacokinetic information as it relates to pregnancy and adverse event profiles of antiretroviral agents are also discussed. The impact of recent advances in the management of HIV infection in pregnancy is discussed with regard to their feasibility in resource-poor countries.

Obstetric and neonatal outcome of babies weighing more than 4.5 kg: an analysis by parity

Objectives: To analyse by parity the obstetric and neonatal outcome of babies delivered weighing more than 4.5 kg. Methods: All deliveries resulting in a baby weighing more than 4.5 kg, in the 5 years from 1991 to 1995, were identified using a computerised database. The following variables confined to singleton, cephalic pregnancies were recorded: mode of delivery, duration of labour, incidence of shoulder dystocia and admission to the neonatal centre. Outcome measures in primigravidae and multigravidae were compared using the Epi Info package (WHO, Version 6.0b January 1997). Results: There were 32,834 deliveries over the study period and 828 (2.5%) weighed more than 4.5 kg. Birthweight more than 4.5 kg occurred in 1.6% ( n=198) of primigravidae and 3.1% ( n=630) of multigravidae ( P<0.05). Primigravidae had a higher risk of prolonged labour (27.7% vs. 4.9%), operative vaginal delivery (32% vs.9%) and emergency caesarean section (24.2% vs. 5.7%) compared to multigravidae. When delivering a macrosomic baby, primigravidae had a higher incidence of prolonged labour (27% vs. 7.9%), operative vaginal delivery (32% vs.25%) and emergency caesarean section (24.2% vs. 5.7%) compared to normal weight babies. The incidence of shoulder dystocia and elective caesarean section were similar in both primigravidae and multigravidae. Conclusions: Macrosomic infants have an increased incidence of prolonged labour, operative vaginal delivery and emergency caesarean section compared with normal weight babies and these complications are more pronounced in primigravidae compared to multigravidae. Shoulder dystocia occurs with equal frequency in primigravidae and multigravidae. The poor antenatal predictability of macrosomia, the high rate of vaginal delivery and the low incidence of shoulder dystocia would not support the use of elective caesarean section for delivery of the macrosomic infant either in primigravidae or multigravidae.

Mother-to-infant transmission of GB virus type C/HGV.

The potentially hepatotropic flavivirus-like virus, GB virus type C (GBV-C)/HGV, has been detected in a few patients with acute and chronic hepatitis and in a certain proportion of blood donors and recipients of blood or blood components. Sera from 2979 pregnant Japanese women were examined for the presence of GBV-C/HGV RNA by nested RT-PCR. Mothers who were positive for viral RNA and their 34 infants were followed and tested for infection. Of the 2979 women, 32 (1.1%) were positive for GBV-C/HGV RNA. Twenty-six (76.5%) of 34 babies born to these women were positive for the virus when first tested. A significantly higher titer of viral RNA was observed in mothers whose infants were infected than in those whose infants were uninfected (mean +/- SD, 10(6.3 +/- 0.9) vs. 10(4.6 +/- 0.9)/mL; p<0.001). Twenty-three (96%) of 24 babies born to mothers whose serum viral titers were 10(6) mL or more were infected with the virus. Infants delivered by elective caesarean section had a lower risk (OR, 0.13; 95% CI, 0.02-0.82) than those delivered vaginally or by emergency caesarean section. No other risk factors for mother-to-infant transmission were confirmed. GBV-C/HGV is frequently transmitted from mothers to infants in the general population. The most critical factor is the titer of viral RNA in the maternal serum. By the use of elective caesarean section in women with high titers of viral RNA, vertical transmission of the virus may be lessened.

Prevention of vertical HIV transmission: additive protective effect of elective Cesarean section and zidovudine prophylaxis. Swiss Neonatal HIV Study Group.

To study the effect of elective Cesarean section and zidovudine prophylaxis on vertical HIV transmission. Prospective study. Obstetric and paediatric clinics in Switzerland. Children of mothers with HIV infection identified before or at delivery. Routine use of elective Cesarean section for HIV-infected parturients by some Swiss centres since 1985. National recommendation for zidovudine prophylaxis in mid-1994. HIV infection status of children. In a cohort of 494 children born at least 6 months before the analysis date, 67 out of 414 children with known infection status were found to be infected, giving an overall transmission rate of 16.2% [95% confidence interval (CI), 13.0-18.51. Elective Cesarean section with intact membranes and without previous labour was associated with a lower transmission rate of 6% [odds ratio (OR), 0.29; 95% CI, 0.12-0.70; P = 0.006 versus other delivery modes]. Transmission rate was intermediate after spontaneous delivery or non-elective Cesarean section (18%), and higher after obstetric interventions (27%; test for trend, P < 0.001). Since mid-1994, 78% of all women with registered pregnancies have received some form of zidovudine prophylaxis. Transmission rate was reduced from 17 to 7% after any zidovudine exposure (OR, 0.4; 95% CI, 0.11-1.41). Combined use of elective Cesarean section and zidovudine resulted in a 0% transmission rate (none out of 31), compared with 8% (seven out of 86) after elective Cesarean section without zidovudine, 17% (four out of 24) after zidovudine alone, and 20% (55 out of 271) after no intervention. Elective Cesarean section and zidovudine prophylaxis appear to have an additive effect in the prevention of vertical HIV transmission.

Prenatally diagnosed gastroschisis—A preliminary report advocating the use of elective caesarean section: S. Hagberg, K-H. Hökegard, A. Rubenson, et al. Z Kinderchir 43:419–421, (December), 1988

Prenatally diagnosed gastroschisis—A preliminary report advocating the use of elective caesarean section: S. Hagberg, K-H. Hökegard, A. Rubenson, et al. Z Kinderchir 43:419–421, (December), 1988

Prenatally diagnosed gastroschisis--a preliminary report advocating the use of elective caesarean section.

Seven cases of prenatally diagnosed gastroschisis were evaluated. All infants were delivered by elective Caesarean section and brought to the operating theatre immediately after birth where the abdominal wall defect was closed within one hour post partum. Primary closure was easy and successful in all cases without widening of the defect and with the umbilicus left intact, because of the total lack of oedema and bowel peel. The average duration of postoperative total parenteral nutrition (7 days) and hospital stay (18 days) was significantly shorter in this prenatally diagnosed group compared to traditionally treated cases.

OUTCOME OF TERM BREECH DELIVERY IN PRIMIGRAVIDAE. A FETO-PELVIC BREECH INDEX

Analysis of 340 term breech presentations in primigravidas showed a corrected perinatal mortality of 1.5%; the elective cesarean section rate was 15%. The incidence of complicated labour, defined in the study, was analyzed with regard to different parameters, e.g. X-ray pelvimetry data in all 340 cases. Complicated labour in vaginal deliveries markedly increased with increasing fetal weight (p>0.001) and decreasing pelvic capacity (p>0.001). In each case the fetal weight and smallest pelvimetry data were given score points and the sum of these was called the Feto Pelvic Breech Index, which was correlated to the incidence of complicated labour. By using this index the mortality and morbidity probably can be markedly reduced without the routine use of elective cesarean section. The prognostic methods available to detect feto-pelvic disproportion are discussed.

Outcome of term breech delivery in primigravidae. a feto peivicbreech index.

Analysis of 340 term breech presentations in primigravidas showed a corrected perinatal mortality of 1.5%; the elective cesarean section rate was 15%. The incidence of complicated labour, defined in the study, was analyzed with regard to different parameters, e.g. X-ray pelvimetry data in all 340 cases. Complicated labour in vaginal deliveries markedly increased with increasing fetal weight (p less than 0.001) and decreasing pelvic capacity (p less than 0.001). In each case the fetal weight and smallest pelvimetry data were given score points and the sum of these was called the Feto Pelvic Breech Index, which was correlated to the incidence of complicated labour. By using this index the mortality and the routine use of elective cesarean section. The prognostic methods available to detect feto-pelvic disproportion are discussed.