Preserving the pelvic floor and perineum during childbirth--elective caesarean section?

Prefrontal Cortical and Behavioral Adaptations to Surgical Delivery Mediated by Metabolic Principles

We previously observed an association between mode of delivery and brain mitochondrial mechanisms in pups. We also showed that mitochondrial processes impact adult behavior. However, no experimental data is available to causally connect mode of delivery with cellular processes of neurons in the cerebral cortex and adult behavior. Here we show that surgical delivery of pups alters mitochondrial dynamics and spine synapses of layer 3 pyramidal neurons of the prefrontal cortex compared to the values of mice delivered vaginally. These alterations in ultrastructure seen in adult mice delivered surgically were associated with the development of behavioral phenotypes resembling those characteristic of animal models of psychiatric illness. This included impaired performance in prepulse inhibition as well as hyperlocomotion in the open field and elevated plus maze tests. Knocking out a mitochondria-related gene, UCP-2, blocked cellular and behavioral adaptations induced by surgical delivery. These results highlight a crucial role for brain mitochondrial adaptations in the process of birth to affect neuronal circuitry in support of normal and altered adult behaviors. Further, these findings were supported with neuroimaging data from human neonates delivered vaginally and surgically, suggesting that the murine findings have human clinical relevance.

Increased cesarean section rate in Central Saudi Arabia: a change in practice or different maternal characteristics

Background

Cesarean section (CS) rate has shown an alarming increase. We aimed in this work to identify factors contributing to the increasing rate of CS in central Saudi Arabia.

Methods

A retrospective cohort study was conducted at King Abdulaziz Medical City. Two groups of women were included (G1 and G2). G1 had delivered by CS during the year 2002 (CS rate 12%), and G2 had delivered by CS during the year 2009 (CS rate 20%). We compared the included women’s characteristics, neonates, CS indications, and complications. Data were analyzed using SPSS version 15 program. Odds ratios and confidence intervals were calculated to report precision of categorical data results. A P-value of ≤0.05 was considered significant.

Results

A total of 198 women were included in G1 and 200 in G2. Both groups had comparable maternal and fetal characteristics; however, absence of antenatal care has resulted in 70% increase in CS deliveries for G2, P=0.008, OR =0.30, CI 0.12–0.76. Previous vaginal surgeries have contributed to tenfold increase in CS deliveries for G2, P=0.006, OR =10.37, CI 1.32–81.78. G2 had eight times increased CS deliveries than G1 due to intrauterine growth restriction, P=0.02, OR =8.21, CI 1.02–66.25, and 80% increased risk of CS was based on maternal demand, P=0.02, OR =0.20, CI 0.02–1.71. Decision taken by less-experienced staff was associated with 2.5-fold increase in CS deliveries for G2, P=0.002, OR =2.62, CI 1.39–4.93. There was a significant increase in CS deliveries under regional analgesia and shorter duration of hospital stay for G2, P=0.0001 and P=0.001, respectively. G2 women had 2.75-fold increase in neonatal intensive care unit admission, P=0.03, OR =2.75, CI 1.06–7.15.

Conclusion

CS delivery rate significantly increased within the studied population. The increased rate of CS may be related to a change in physician’s practice rather than a change in maternal characteristics, and it appears to be reducible.

The Influence of Back Pain and Urinary Incontinence on Daily Tasks of Mothers at 12 Months Postpartum

Objective

The present study examined back pain (BP) and/or urinary incontinence (UI) impact on the ability to perform daily tasks at 12 months after childbirth in healthy reproductive women who sought maternity care in community based family practice clinics.

Methods

This study is a secondary analysis from the All Our Babies Study, a prospective, community-based pregnancy cohort in Calgary, Alberta. Maternal self-reported information on demographics, lifestyle, experiences with pregnancy and childbirth, occurrence of BP, UI and consequent impairment of daily tasks were collected by questionnaires administered before 25 weeks, at 34-36 weeks gestation and at 4 and 12 months postpartum. The occurrence and severity of BP and UI at one year after childbirth was assessed using descriptive and bivariate analyses. Logistic regression models examined the association between demographic and obstetrical variables and the severity of functional impairment due to UI and BP.

Results

From 1574 women with singleton pregnancies included in the study, 1212 (77%) experienced BP, 773 (49%) UI, and 620 (40%) both BP and UI. From the 821 women reporting impairment of daily tasks due to BP, 199 (24 %) were moderately and 90 (11%) severely affected with the remainder, 532 (64%) being mildly affected. From 267 women with functional impairment due to UI, 52 (19%) reported moderately to severe impairment in their ability to perform daily tasks. Obesity and parity were risk factors for impairment of daily functioning due to BP, whereas obesity and vaginal delivery increased the risk of moderate to severe impairment due to UI.

Conclusions

BP and UI are common occurrences 1 year after childbirth. Maternal performance of daily tasks and women’s health and quality of life are more often impaired due to BP than UI. Our study brings new evidence of the risk factors that predict severity and impact of these conditions on women functioning at 12 months postpartum.

Caesarean—Changing Values and Rising Expectations in India

Background:

India is reporting an unusually increased demand for caesarean sections (CS), especially among middle class and affluent women. The present study aims to find out whether the increase in CS rates has achieved lower neonatal and maternal mortality.

Method:

A retrospective study using three National Family and Health Survey (NFHS) data sets—1993–1994, 1998–1999 and 2003–2004—was conducted. The study substantiated the evidence from qualitative inputs drawn from interviews from women and medical practitioners.

Results:

About one-eighth of all deliveries take place in the private sector; more than 30 per cent are by caesareans. Percentage of births delivered in a health facility has increased from 26.1 per cent in 1992–1993 to 40.8 per cent in 2005. Primiparous women aged below 35 years had more CSs compared to women over 35 (14 per cent in 1992–1993 to 15.5 per cent in 2005–2006 versus 7.8 per cent in 1992–1993 to 9.3 per cent in 2005–2006). The higher the woman’s educational level and the household income, the more likely she is to have a CS. CS was correlated with a reduction in neonatal mortality by about 3.53 per cent in 1993–1994, 3.30 per cent in 1998–1999 and 3.07 per cent in 2005–2006. CS was also correlated with a reduction in neonatal deaths by about 3.47 per cent in 1993–1994, 2.82 per cent in 1998–1999 and 3.03 per cent in 2005–2006.

Conclusion:

Individuals and families along with many private hospitals hoped that emergency obstetric care initiatives would maximize return on investment, which has reached unheard-of proportions across India. It puts health systems’ inefficiencies in the unenviable position of not following rationale drug use policies and ending up with the wrong kind of problem—something that does not fit well with the self-image of health care professionalism.

Natural birth-induced UCP2 in brain development

The prevalence of convenience-driven delivery via Caesarian-section (C-section) has been steadily increasing in Western as well as in developing societies. Today, significantly more deliveries occur via surgical means than medical necessity mandates. Despite tremendous advances in surgical techniques and pre- and post-operative surgical care, there remains to be limited understanding on the physiological influence of vaginal birth with particular emphasis on long term outcome on the offspring. Serendipitously, we recently uncovered in mice that vaginal birth induces significantly higher level of Ucp2 mRNA expression in the hippocampus than experimental C-section. We showed that during the early postnatal period, UCP2 expression promotes neuronal differentiation, axonal outgrowth and synapse formation in the hippocampus. We also observed that Ucp2 knockout animals show adult behaviors associated with the hippocampal formation that is different from wild type littermates. Taken together these observations suggest that vaginal birth may play a crucial role in determining adult brain structure and function that is different from that of the effect of surgically assisted birth.

Caesarean section for non-medical reasons at term

BACKGROUND

Caesarean section rates are progressively rising in many parts of the world. One suggested reason is increasing requests by women for caesarean section in the absence of clear medical indications, such as placenta praevia, HIV infection, contracted pelvis and, arguably, breech presentation or previous caesarean section. The reported benefits of planned caesarean section include greater safety for the baby, less pelvic floor trauma for the mother, avoidance of labour pain and convenience. The potential disadvantages, from observational studies, include increased risk of major morbidity or mortality for the mother, adverse psychological sequelae, and problems in subsequent pregnancies, including uterine scar rupture and a greater risk of stillbirth and neonatal morbidity. The differences in neonatal physiology following vaginal and caesarean births are thought to have implications for the infant, with caesarean section potentially increasing the risk of compromised health in both the short and the long term. An unbiased assessment of advantages and disadvantages would assist discussion of what has become a contentious issue in modern obstetrics.

OBJECTIVES

To assess, from randomised trials, the effects on perinatal and maternal morbidity and mortality, and on maternal psychological morbidity, of planned caesarean delivery versus planned vaginal birth in women with no clear clinical indication for caesarean section.

SEARCH METHODS

We searched the Cochrane Pregnancy and Childbirth Group's Trials Register (31 January 2012) and reference lists of relevant studies.

SELECTION CRITERIA

All comparisons of intention to perform caesarean section and intention for women to give birth vaginally; random allocation to treatment and control groups; adequate allocation concealment; women at term with single fetuses with cephalic presentations and no clear medical indication for caesarean section.

DATA COLLECTION AND ANALYSIS

We identified no studies that met the inclusion criteria.

MAIN RESULTS

There were no included trials.

AUTHORS' CONCLUSIONS

There is no evidence from randomised controlled trials, upon which to base any practice recommendations regarding planned caesarean section for non-medical reasons at term. In the absence of trial data, there is an urgent need for a systematic review of observational studies and a synthesis of qualitative data to better assess the short- and long-term effects of caesarean section and vaginal birth.

After the Afterbirth: A Critical Review of Postpartum Health Relative to Method of Delivery

Four million women give birth each year in the United States, yet postpartum health has gone largely unaddressed by researchers, clinicians, and women themselves. In light of rising US cesarean birth rates, a critical need exists to elucidate the ramifications of cesarean birth and assisted vaginal birth on postpartum health. This literature review explores the current state of knowledge on postpartum health in general and relative to method of delivery. Randomized trials and other published reports were selected from relevant databases and hand searches. The literature indicates that postpartum morbidity is widespread and affects the majority of women regardless of method of delivery. Women who have spontaneous vaginal birth experience less short- and long-term morbidity than women who undergo assisted vaginal birth or cesarean birth. To maximize postpartum health, providers of obstetric care need to protect the perineum during vaginal birth and avoid unnecessary cesarean deliveries. Clinicians must initiate the discussion about postpartum health antenatally and encourage women to enlist needed support early in the postpartum period. Flexibility in the schedule of postpartum care is essential. More research from the United States is warranted.

Short vs long second stage of labour: is there a difference in terms of postpartum anal incontinence?

OBJECTIVE

Our purpose was to determine if prolonged second-stage labour independently increases postpartum anal incontinence.

STUDY DESIGN

360 primiparous women were studied retrospectively after vaginal delivery of term cephalic singletons, including a group with short second-stage labour (<30min, n=163) and a group with a prolonged second stage (>90min, n=197). A quality of life questionnaire on anal incontinence (FIQOL) was sent out at 15 months after delivery.

RESULTS

184 women (96 with short second-stage labour and 88 with a prolonged second stage) answered the questionnaire (response rate 51%). Flatus incontinence was reported after prolonged second-stage labour in 9.1% of women vs 15.6% after short second stage (p=0.18). Fecal incontinence was reported after prolonged second-stage labour in 2.3% vs 5.2% after a short second stage (p=0.45).

CONCLUSION

We suggest that prolonged second stage of labour should not be associated with an increased risk of postpartum incontinence.

Primigravid women's views of being approached to participate in a hypothetical term cephalic trial of planned vaginal birth versus planned cesarean birth

BACKGROUND

Several papers have called for a trial of planned cesarean section versus planned vaginal birth for low-risk women-a recommendation that is fiercely debated. Although proponents of a trial have voiced their support, evidence suggests that in the United Kingdom few midwives and obstetricians believe such a trial to be feasible, and no studies reporting women's views on the prospect of such a trial have been published. The purpose of this study is to explore women's views of participation in a trial of planned cesarean birth versus planned vaginal birth.

METHODS

A qualitative study was conducted using in-depth interviews in a large maternity hospital in the United Kingdom. Sixty-four women were interviewed 12 months after giving birth. Women were asked "How do you think you would have felt if you had been approached to take part in such a trial during your first pregnancy?" Data were analyzed thematically.

RESULTS

Only 3 of the 64 women stated that they would have participated in a trial of planned vaginal birth versus planned cesarean section, had they been asked. However, five other women said that they would have consented to participate if they had been asked during pregnancy, but with hindsight, would have regretted that decision. The remainder of women would not have participated, unless a preference arm was offered. Three main themes were identified: "feeling cheated," "let nature take its course," and "just another trauma that you don't need."

CONCLUSIONS

Few women supported a trial and most suggested that it was intuitively wrong. Given the strong views voiced by women, it is unlikely that a trial of planned vaginal delivery versus planned cesarean delivery would be feasible.

The rise in obstetric intervention with maternal age: a continuous phenomenon

Population-based data from the Cardiff Births Survey has been used to examine the trends in obstetric intervention with increasing maternal age. As maternal age increases, spontaneous vaginal delivery rates fall, instrumental delivery rates, elective and emergency caesarean section, induction of labour and epidural rates rise. Induction of labour and epidural in labour are both associated with decreased spontaneous vaginal delivery rates and an increase in instrumental delivery rates and emergency caesarean section.

Obstetric anal sphincter injury: incidence, risk factors, and management

BACKGROUND AND AIMS

Obstetric sphincter damage is the most common cause of fecal incontinence in women. This review aimed to survey the literature, and reach a consensus, on its incidence, risk factors, and management.

METHOD

This systematic review identified relevant studies from the following sources: Medline, Cochrane database, cross referencing from identified articles, conference abstracts and proceedings, and guidelines published by the National Institute of Clinical Excellence (United Kingdom), Royal College of Obstetricians and Gynaecologists (United Kingdom), and American College of Obstetricians and Gynecologists.

RESULTS

A total of 451 articles and abstracts were reviewed. There was a wide variation in the reported incidence of anal sphincter muscle injury from childbirth, with the true incidence likely to be approximately 11% of postpartum women. Risk factors for injury included instrumental delivery, prolonged second stage of labor, birth weight greater than 4 kg, fetal occipitoposterior presentation, and episiotomy. First vaginal delivery, induction of labor, epidural anesthesia, early pushing, and active restraint of the fetal head during delivery may be associated with an increased risk of sphincter trauma. The majority of sphincter tears can be identified clinically by a suitably trained clinician. In those with recognized tears at the time of delivery repair should be performed using long-term absorbable sutures. Patients presenting later with fecal incontinence may be managed successfully using antidiarrheal drugs and biofeedback. In those who fail conservative treatment, and who have a substantial sphincter disruption, elective repair may be attempted. The results of primary and elective repair may deteriorate with time. Sacral nerve stimulation may be an appropriate alternative treatment modality.

CONCLUSIONS

Obstetric anal sphincter damage, and related fecal incontinence, are common. Risk factors for such trauma are well recognized, and should allow for reduction of injury by proactive management. Improved classification, recognition, and follow-up of at-risk patients should facilitate improved outcome. Further studies are required to determine optimal long-term management.

ORIGINAL RESEARCH–COUPLES' SEXUAL DYSFUNCTIONS: Does Mode of Delivery Affect Sexual Functioning of the Man Partner?

INTRODUCTION

Recent surveys showed that the major reasons for avoiding vaginal delivery were the fear of childbirth and the concern for postpartum sexual health. Although sexual dysfunction is a disorder that affects a couple rather than an individual, all studies investigating the relationship between the mode of delivery and sexual problems have been conducted only in cohorts of women.

AIM

To determine the effect of mode of delivery on quality of sexual relations and sexual functioning of men by using the Golombock-Rust Inventory of Sexual Satisfaction (GRISS).

MAIN OUTCOME MEASURE

Mean score of sexual function and prevalence of sexual dysfunction in overall and specific areas of the GRISS were compared among the three groups.

METHODS

A total of 107 men accompanying their wives in outpatient clinics of obstetrics and gynecology met inclusion/exclusion criteria. Three groups of men were defined; men whose partners had: (i) "elective cesarean delivery" (N = 21; mean age 32.2 +/- 3.8 years); (ii) "vaginal delivery with mediolateral episiotomy" (N = 36; mean age 31.4 +/- 4.5 years); and (iii) "not given birth" (N = 50; mean age 28.8 +/- 4.0 years).

RESULTS

Mean overall sexual function score (normal value < 25 points) was 20.5 +/- 8.2 in the elective caesarean group, 19.3 +/- 6.5 in the vaginal delivery group, and 18.8 +/- 9.3 in the nulliparae group (P = 0.731). Prevalence of sexual dysfunction in men was 28.6% in the elective caesarean group, 19.4% in the vaginal delivery group, and 30.0% in the nulliparae group (P = 0.526).

CONCLUSION

Overall sexual function of men was not affected by their partner's parity and mode of delivery. An elective cesarean section simply because of concerns about sexual function would not provide additional benefit to men, and could deny women a possible vaginal delivery, which is generally assumed to be safer than cesarean section.

The prevalence of occult obstetric anal sphincter injury following childbirth--literature review

OBJECTIVE

To calculate the published prevalence of ultrasound-detected occult anal sphincter damage associated with different modes of delivery.

METHODS

A search of the English language literature for articles using keywords describing the prevalence of ultrasound-diagnosed anal sphincter injury following childbirth. The weighted mean prevalence of occult anal sphincter injury was calculated in the following groups: (1) primiparous women (unselected); (2) primiparous women after an unassisted normal vaginal delivery; (3) multiparous women (unselected); (4) following forceps delivery; (5) following ventouse delivery; (6) following cesarean section.

RESULTS

Nineteen articles described ultrasound-diagnosed occult anal sphincter injury. The prevalence in unselected primiparous women (excluding cesarean section) was 29.2% (288/983). After unassisted vaginal delivery in primiparae the prevalence was 21.7% (74/341). The incidence in multiparous women (unselected) is 32.3% (107/331); following forceps delivery 49.1% (131/267) and with ventouse delivery it is 45.2% (66/146). Only one woman (in 173 cases) had anal sphincter injury following cesarean section.

CONCLUSIONS

After a review of the literature, occult anal sphincter injury is mostly associated with the first vaginal delivery and is particularly high following instrumental deliveries. Ventouse is less traumatic than forceps. Cesarean section is protective to the anal sphincter.

The prevalence of enduring postnatal perineal morbidity and its relationship to type of birth and birth risk factors

AIMS AND OBJECTIVES

To investigate the prevalence of perineal morbidity at 12 months postnatal and its relationship to type of birth and birth risk factors.

BACKGROUND

It is well documented that women endure short-term postnatal perineal morbidity following childbirth (e.g. incontinence, perineal pain and sexual morbidity). However, to date, very little research has been carried out on the long-term effects of perineal morbidity and its relationship to the type of birth the women experienced and other birth risk factors (e.g. ethnic origin, age, parity, length of labour, epidural anaesthesia).

DESIGN

A retrospective, cross-sectional community survey of postnatal women within two maternity units in Birmingham.

METHODS

A total population sample of 2,100 women were surveyed using a self-administered postal questionnaire. The questionnaire included self-assessment of perineal pain, perineal healing, urinary incontinence, flatus incontinence, faecal incontinence, sexual morbidity and dyspareunia. Demographic details, type of birth and birth risk factors were taken from the hospital's computerized maternity information system.

RESULTS

Four hundred and eighty-two women responded to the questionnaire (23.3%). Overall, a high level of enduring perineal morbidity was reported with 87% complaining of at least one index of morbidity. Instrumental births were associated with higher levels of certain types of perineal morbidity than women following a caesarean section or normal vaginal birth (stress and urge urinary incontinence, flatus incontinence, sexual morbidity and dyspareunia). In particular, women following a forceps birth reported higher levels of morbidity than normal or ventouse birth (continual, stress and urge urinary incontinence and flatus incontinence), even when comparing with the same degree of perineal trauma. Increasing age, increasing birth weight, length of labour and particularly Asian ethnic origin were also identified as risk factors for certain types of perineal morbidity.

CONCLUSIONS

The study concludes that enduring perineal morbidity in women following childbirth is common, especially with women following a forceps birth and certain birth risk factors (i.e. age, ethnic origin, length of labour and birth weight).

RELEVANCE TO CLINICAL PRACTICE

These findings highlight the need for further research and provide a number of challenges for health-care services and health-care professionals.

Mode of delivery and subsequent long-term sexual function of primiparous women

Minimal information exists on unintended health consequences following childbirth, particularly in relation to mode of delivery. This study aimed to evaluate the impact of mode of delivery on long-term sexual satisfaction of women by using a validated questionnaire. Forty-five primiparous women who had cesarean deliveries and 90 primiparous women who had vaginal deliveries with mediolateral episiotomies enrolled in the study. Quality of sexual relations and sexual satisfaction were self-reported by using Golombock-Rust Inventory of Sexual Satisfaction. Prevalence of sexual dissatisfaction was compared between the two groups and logistic regression analysis was carried out to identify the predictors of sexual dissatisfaction. The prevalence of overall sexual dissatisfaction was 4.4% in cesarean group while it was 14.4% in vaginal delivery group (P=0.081). Vaginal delivery group demonstrated a trend toward higher prevalence of dissatisfaction in all subscales except sensuality area than cesarean group, however, differences between two groups did not reach to statistical significance. Degree of pleasure for relationship with the spouse was identified as a significant predictor for overall sexual dissatisfaction (P=0.008). Our findings suggest that sexual dissatisfaction should not be assumed simply a product of the delivery mode. Individual, socio-demographic, lifestyle and marital characteristics should also be taken into account.

The effect of mode of delivery on postpartum sexual functioning in primiparous women

The objective of this paper is to evaluate the effect of mode of delivery on postpartum sexual functioning in primiparous women. A total of 248 primiparous women were recruited into this study. One hundred fifty-six delivered spontaneously with mediolateral episiotomy and 92 had elective cesarean section. Sexual function was evaluated by the Female Sexual Function Index, a validated questionnaire separately evaluating desire, lubrication, orgasm, satisfaction, and pain. Subjects were questioned relating their pre-pregnancy experiences during the first antenatal visit when the pregnancy was not more than six gestational weeks. The test was repeated 6 months postpartum. Statistical evaluation was carried out by SPSS for Windows v.11. In the vaginal delivery with mediolateral episiotomy group, there were significant decreases in the scores 6 months after delivery when compared to scores before pregnancy (p<0.001). In the cesarean section group, no difference was observed between pre-pregnancy and postpartum scores (p>0.05). When the two groups were compared, there was a significant difference between 6 months postpartum scores (p<0.001). Not only pain, but also other important aspects of sexual function, such as arousal, lubrication, orgasm, and satisfaction are affected by performing mediolateral episiotomy during vaginal delivery, well beyond the puerperal period. Concerning its effects on postpartum sexual functioning, a policy of restricting mediolateral episiotomy use should be adopted.

Caesarean section for non-medical reasons at term

BACKGROUND

Caesarean section rates are progressively rising in many parts of the world. One suggested reason is increasing requests by women for caesarean section in the absence of clear medical indications, such as placenta praevia, HIV infection, contracted pelvis and, arguably, breech presentation or previous caesarean section. The reported benefits of planned caesarean section include greater safety for the baby, less pelvic floor trauma for the mother, avoidance of labour pain and convenience. The potential disadvantages, from observational studies, include increased risk of major morbidity or mortality for the mother, adverse psychological sequelae, and problems in subsequent pregnancies, including uterine scar rupture and greater risk of stillbirth and neonatal morbidity. An unbiased assessment of advantages and disadvantages would assist discussion of what has become a contentious issue in modern obstetrics.

OBJECTIVES

To assess, from randomised trials, the effects on perinatal and maternal morbidity and mortality, and on maternal psychological morbidity, of planned caesarean delivery versus planned vaginal birth in women with no clear clinical indication for caesarean section.

SEARCH STRATEGY

We searched the Cochrane Pregnancy and Childbirth Group's Trials Register (December 2005), MEDLINE (1974 to April 2005), EMBASE (1974 to April 2005), CINAHL (1982 to April 2005) and PsycINFO (1887 to April 2005). We also performed a manual search of the references of all retrieved articles, sought unpublished papers and abstracts submitted to international conferences and contacted expert informants.

SELECTION CRITERIA

All comparisons of intention to perform caesarean section and intention for women to give birth vaginally; random allocation to treatment and control groups; adequate allocation concealment; women at term with single fetuses with cephalic presentations and no clear medical indication for caesarean section.

DATA COLLECTION AND ANALYSIS

We identified no studies that met the inclusion criteria.

MAIN RESULTS

There were no included trials.

AUTHORS' CONCLUSIONS

There is no evidence from randomised controlled trials, upon which to base any practice recommendations regarding planned caesarean section for non-medical reasons at term. In the absence of trial data, there is an urgent need for a systematic review of observational studies and a synthesis of qualitative data to better assess the short- and long-term effects of caesarean section and vaginal birth.

Repair techniques for obstetric anal sphincter injuries: a randomized controlled trial

OBJECTIVE

To compare one-year outcomes of primary overlap versus end-to-end repair of the external anal sphincter after acute obstetric anal sphincter injury.

METHODS

Women who sustained third-degree (3b = greater than 50% external anal sphincter thickness, 3c = internal sphincter injury) or fourth-degree (including anorectal epithelium) perineal tears were randomly allocated to either immediate primary overlap or end-to-end repair. They were prospectively followed up for 12 months postrepair with serial questionnaires. The primary outcome was fecal incontinence at 12 months. Secondary outcomes were fecal urgency, flatus incontinence, perineal pain, dyspareunia, quality of life, and improvement of anal incontinence symptoms.

RESULTS

Thirty-two women were randomized to each group. At 12 months, 24% (6/25) in the end-to-end and none in the overlap group reported fecal incontinence (P = .009, relative risk [RR] 0.07, 95% confidence interval [CI] 0.00-1.21, number needed to treat 4.2). Fecal urgency at 12 months was reported by 32% (8/25) in the end-to-end and 3.7% (1/27) in the overlap group (P = .02, RR 0.12, 95% CI 0.02-0.86, number needed to treat 3.6). There were no significant differences in dyspareunia and quality of life between the groups. At 12 months, 20% (5/25) reported perineal pain in the end-to-end and none in the overlap group (P = .04, RR 0.08, 95% CI 0.00-1.45, number needed to treat 5). During 12 months, 16% (4/25) in the end-to-end and none in the overlap group reported deterioration of defecatory symptoms (P = .01).

CONCLUSION

Primary overlap repair of the external anal sphincter is associated with a significantly lower incidence of fecal incontinence, urgency, and perineal pain. When symptoms do develop, they appear to remain unchanged or deteriorate in the end-to-end group but improve in the overlap group.

LEVEL OF EVIDENCE

I.

Risk factors for obstetric anal sphincter injury: a prospective study

BACKGROUND

Anal incontinence is an embarrassing condition that is largely underreported. Obstetric anal sphincter injuries are the major etiological factor. Recognition of risk factors may minimize the development of sphincter injuries. The objective of this study was to identify risk factors for sphincter injuries and measure dimensions of mediolateral episiotomies.

METHODS

Women expecting their first vaginal delivery were invited to participate, and an experienced research fellow performed a perineal and rectal examination and classified tears according to the new international classification. Dimensions of episiotomies were measured and obstetric variables recorded prospectively.

RESULTS

Of the 241 women recruited, 59 (25%) sustained sphincter injuries. Univariate analysis revealed that forceps delivery OR 4.03 (1.63-9.92), vacuum extraction OR 2.64 (1.25-5.54), gestation > 40 weeks OR 3.18 (2.35-4.29), and mediolateral episiotomy OR 5.0 (2.64-9.44) were associated with these injuries. In addition, compared with women who had no injuries, sphincter injuries were more common with higher birthweight (3.51 vs 3.17 kg, p < 0.01), larger head circumference (34.3 vs 33.3 cm, p < 0.01), and longer second stage of labor (76 vs 51 min, p < 0.01). Multiple logistic regression revealed higher birthweight and mediolateral episiotomy OR 4.04 (1.71-9.56) as independent risk factors. Episiotomies angled closer to the midline were significantly associated with such injuries (26 vs 37 degrees, p = 0.01). No midwife and only 13 (22%) doctors performed truly mediolateral episiotomies.

CONCLUSIONS

Mediolateral episiotomy is an independent risk factor for anal sphincter injuries. Although a liberal policy of mediolateral episiotomy does not appear to reduce the risk of such injuries, it may be related to inappropriate technique. A concerted approach to educate trainees in appropriate episiotomy technique and identification of sphincter injuries is imperative to enable reexamination of the true merits or disadvantages of mediolateral episiotomy.

Recent impact of anal sphincter injury on overall Caesarean section incidence

INTRODUCTION

Because of increasing recognition of obstetric anal sphincter injury and faecal incontinence, we examined the recent impact of these indications on our institutional Caesarean section incidence.

METHODS

Retrospective review of the indications for multiparous Caesarean section was performed at the National Maternity Hospital for the 4 years 2000-2003, inclusive, to identify women in whom previous anal sphincter injury was an indication. Individual charts were reviewed and data regarding the nature and extent of previous anal sphincter injury were obtained.

RESULTS

Among 17 586 consecutive multiparous deliveries, previous anal sphincter trauma constituted the indication for Caesarean delivery in 67 women, representing 0.4% of all multiparae, 2.9% of multiparous Caesarean sections and 1.3% of all Caesarean sections performed. Fifty (85%) of the 67 women who opted for prelabour Caesarean delivery following previous obstetric anal sphincter injury had symptoms of faecal incontinence (mean continence score 5, range 1-17).

CONCLUSION

Notwithstanding recent increased awareness and documentation, anal sphincter problems represent a small influence on total Caesarean incidence.

Maternal health study: a prospective cohort study of nulliparous women recruited in early pregnancy

Background

In the first year after childbirth, 94% of women experience one or more major health problems (urinary incontinence, faecal incontinence, perineal pain, back pain). Difficulties in intimate partner relationships and changes affecting sexual health are also common. The aim of this study is to investigate changes in women's health from early pregnancy until four years after the birth of a first child.

Methods/design

The Maternal Health Study is a longitudinal study designed to fill in some of the gaps in current research evidence regarding women's physical and psychological health and recovery after childbirth. A prospective pregnancy cohort of >1500 nulliparous women has been recruited in early pregnancy at six metropolitan public hospitals in Melbourne, Australia between April 2003 and December 2005. In the first phase of the study participants are being followed up at 30–32 weeks gestation in pregnancy, and at three, six, nine, 12 and 18 months postpartum using a combination of self-administered questionnaires and telephone interviews. Women consenting to extended follow-up (phase 2) will be followed up six and 12 months after any subsequent births and when their first child is four years old. Study instruments incorporate assessment of the frequency and severity of urinary and bowel symptoms, sexual health issues, perineal and abdominal pain, depression and intimate partner violence. Pregnancy and birth outcome data will be obtained by review of hospital case notes.

Discussion

Features of the study which distinguish it from prior research include: the capacity to identify incident cases of morbidity and clustering of health problems; a large enough sample to detect clinically important differences in maternal health outcomes associated with the method of birth; careful exposure measurement involving manual abstraction of data from medical records in order to explore mediating factors and possible causal pathways; and use of a variety of strategies to improve ascertainment of health outcomes.

Computer interviewing in urogynaecology: concept, development and psychometric testing of an electronic pelvic floor assessment questionnaire in primary and secondary care

OBJECTIVE

To develop and evaluate a Web-based, electronic pelvic floor symptoms assessment questionnaire (e-PAQ)1 for women.

DESIGN

A cross-sectional study in primary and secondary care.

SETTING

Two general practices, two community health clinics and a secondary care urogynaecology clinic.

SAMPLE

A total of 432 women (204 in primary care and 228 in secondary care) were recruited between June 2003 and January 2004.

METHODS

The e-PAQ was located on a workstation (computer, touchscreen and printer). Women completed the e-PAQ prior to their appointment. Untreated women in primary care were asked to return seven days later to complete the e-PAQ a second time (test-retest).

MAIN OUTCOME MEASURES

Factor analysis, reliability, validity, patient satisfaction, completion times and system costs.

RESULTS

In secondary care, factor analysis identified 14 domains within the four dimensions (urinary, bowel, vaginal and sexual symptoms) with internal consistency (Cronbach's alpha)>or=0.7 in 11 of these. In primary care, alpha values were all>or=0.7 and test-retest analysis found acceptable intraclass correlations of 0.50-0.95 (P<0.001) for all domains. A measure of face validity and utility was gained using a nine-item questionnaire, which yielded strongly positive patient views on relevance and acceptability.

CONCLUSIONS

The e-PAQ offers a user-friendly clinical tool, which provides valid and reliable data. The system offers comprehensive symptoms and quality of life evaluation and may enhance the clinical episode as well as the quality of care for women with pelvic floor disorders.

Obstetric risk factors for symptomatic prolapse: a population-based approach

OBJECTIVE

The purpose of this study was to identify obstetric risk factors for symptomatic prolapse.

STUDY DESIGN

This was a population-based case-control study of prolapse prevalence.

RESULTS

Four hundred fifty-four women with self-reported symptomatic pelvic organ prolapse who were identified among 5489 women who participated in a population survey (cases) and 405 control subjects without symptoms were selected randomly from the same survey. All cases and control subjects received a mailed questionnaire with 72 questions about factors that were suspected to be linked to risk and that included obstetric history. The response rate was 76%. Among parous women, the odds for symptomatic pelvic organ prolapse increased with number of childbirths and were 3.3-fold higher among mothers of 4 than among mothers of 1. Indices of excessive stretching and tearing during labor (vaginal lacerations or episiotomies) were associated with increased risk for symptomatic pelvic organ prolapse. Instrumental delivery with forceps or vacuum did not seem to increase the risk of symptomatic pelvic organ prolapse, nor did length of delivery or maternal age at time for delivery. Abdominal deliveries appeared to be protective; the age- and parity-adjusted odds ratio of symptomatic pelvic organ prolapse after > or =1 abdominal deliveries was 0.5 (95% CI, 0.3-0.9), relative to women who had had only vaginal deliveries. A positive association with child birth weight in unadjusted analyses disappeared after adjustments for attained age and parity of the mother.

CONCLUSION

Excessive stretching and tearing and multiple deliveries seem to be the main predisposing obstetric factors for symptomatic pelvic organ prolapse. Abdominal delivery emerged as a comparably strong protective factor.

Cesarean section and postnatal sexual health

BACKGROUND

Cesarean delivery avoids perineal trauma and has therefore often been assumed to protect sexual function after childbirth. We sought to examine this assumption by using data from a study of women's sexual health after childbirth to assess whether women who underwent cesarean section experienced better sexual health in the postnatal period than women with vaginal births.

METHODS

A cross-sectional study was conducted of 796 primiparous women, employing data from obstetric records and a postal survey 6 months after delivery.

RESULTS

Any protective effect of cesarean section on sexual function was limited to the early postnatal period (0-3 months), primarily to dyspareunia-related symptoms. At 6 months the differences in dyspareunia-related symptoms, sexual response-related symptoms, and postcoital problems were much reduced or reversed, and none reached statistical significance.

CONCLUSIONS

Outcomes from this study provide no basis for advocating cesarean section as a way to protect women's sexual function after childbirth.

Is it possible to predict or prevent third degree tears?

OBJECTIVES

This paper reviews the causes anal sphincter injury during vaginal delivery. It emphasises that they are not usually the result of poor obstetric care. The role of the colorectal surgeon in their management is discussed.

METHODS

Medline was searched using the key words third degree tears, pregnancy, risk factors, prevention and recurrence risk. A hand search of journals and located articles was made. Two hundred and twenty three papers were identified, 84 are referenced.

RESULTS

The reported incidence of anal sphincter tears is usually between 0.5% and 2.5% of vaginal deliveries. Maternal factors such as parity and age and obstetric factors such as mode of presentation, the use of forceps and the size of the baby all influence the incidence of sphincter tears. Predicting tears in individual women is inaccurate and midwifery practices can do little to prevent them. Reducing pelvic floor morbidity by increasing the caesarean section rate would require that a large number of caesarean sections be done to prevent a small number of tears. The recognition of perineal trauma is improved by training. Accurate apposition of the sphincters with antibiotic cover and post-operative laxatives are the important technical aspects of the repair. Colorectal follow up helps to identify those women with symptoms and allows advice about the advisability of subsequent vaginal deliveries. A previous third degree tears increases the risk of a subsequent one, although the overall risk remains low. A second vaginal delivery after a third degree tear that has resulted in a functional deficit predisposes to worsening function. When there is no residual anatomical defect and no functional loss, there is no evidence of increased risk of incontinence following another vaginal delivery.

CONCLUSION

Vaginal delivery will continue to be the main method of delivery and will continue to generate a low incidence of pelvic floor morbidity. The management of injury to the anal sphincter is facilitated by close co-operation between obstetricians and colorectal surgeons.

Fecal incontinence: a review of prevalence and obstetric risk factors

Anal incontinence (AI) is a significant problem that causes social and hygienic inconvenience. The true prevalence of AI is difficult to estimate due to inconsistencies in research methods, but larger studies suggest a rate of 2-6% for incontinence to stool. There is a significant association between sonographically detected anal sphincter defects and symptoms of AI. The intrapartum factors most consistently associated with a higher risk of AI include: forceps delivery, third or fourth degree tears, and length of the second stage of labor. Fetal weight of > 4,000 g is also associated with AI. Repair of the sphincter can be performed in either an overlapping or an end-to-end fashion, with similar results for both methods. The role of cesarean delivery for the prevention of AI remains unclear, and further study should be devoted to this question.

Repeat cesarean section and primary elective cesarean section: recently trained obstetrician-gynecologist practice patterns and opinions

OBJECTIVE

This study was undertaken to determine opinions of obstetrician-gynecologists regarding vaginal birth after cesarean (VBAC) section and elective cesarean section.

STUDY DESIGN

A questionnaire was administered to obstetrician-gynecologists attending 2 review courses.

RESULTS

Of 500 obstetrician-gynecologists, 304 completed the survey for a response rate of 61%. Most (92%) counseled VBAC candidates differently, and 84% quoted differential VBAC completion rates on the basis of the indication for prior cesarean section. Uterine rupture was virtually always discussed (99%). Pelvic floor risks were infrequently discussed with urinary incontinence, pelvic organ prolapse, and fecal incontinence discussed by less than one third of obstetricians (30%, 28%, and 25%, respectively). Fifty-nine percent of physicians would perform a primary elective cesarean section, and 67% would perform a primary elective cesarean section specifically to prevent pelvic floor disorders.

CONCLUSION

Two thirds of recent graduates are willing to perform an elective cesarean section to prevent pelvic floor injury. Most offer VBAC; however, less than a third include risk of pelvic floor injury in their informed consent discussions.

Combined urinary and faecal incontinence

Combined urinary and faecal (liquid or solid) incontinence (double incontinence) is the most severe and debilitating manifestation of pelvic floor dysfunction. The community prevalence is 9-19% (urinary) and 5-10% (faecal), increasing with age. Pathophysiological factors include childbirth-associated external anal sphincter injury and pudendal nerve damage, pelvic floor descent, menopause, collagen disorders and multiple sclerosis-like conditions. The presence of crossed reflexes between the bladder, urethra, anorectum and pelvic floor in animal studies may explain the comorbidity of urinary and faecal urgency. Surgical treatment is based on aetiology and combined optimum techniques such as colposuspension or suburethral sling with overlapping sphincteroplasty. Other methods for improving sphincteric control include sacral nerve neuromodulation, bulking agents and artificial sphincters.

Patient choice cesarean: an evidence-based review

Primary elective cesarean performed on a patient's request now comprises 4% to 18% of all cesareans and 14% to 22% of elective cesareans in reported series. Patients most commonly choose cesarean because of tocophobia, or fear of childbirth. Almost two thirds of obstetricians surveyed are willing to perform cesarean on request, citing decreased risk of pelvic floor or fetal injury, maintenance of sexual functioning, and physician and patient convenience. Contrasting these beliefs are the limited available data on short- and long-term maternal and perinatal morbidity and mortality that generally favor vaginal delivery. Moreover, comprehensive economic impact assessments of cesarean on request are lacking, and professional organizations do not agree on the ethics of offering patient choice cesarean.

TARGET AUDIENCE

Obstetricians & Gynecologists, Family Physicians.

LEARNING OBJECTIVES

After completion of this article, the reader should be able to list the reasons that women and obstetricians choose elective cesarean delivery, to outline the ethical aspects of cesarean delivery, and to describe the material and fetal morbidity and mortality associated with cesarean delivery compared to vaginal delivery.

L’élévation du taux de césariennes : un progrès nécessaire de l’obstétrique moderne

During the last 10 Years, the cesarean section (CS) rate was increased despite of the recommendations of the World Health Organization to keep it below 10-15%. The purpose of this review of the literature was to demonstrate how the concept of CS rate limitation has become obsolete. The increase in the CS rate is mainly justified by the decrease in maternal mortality and morbidity following elective CS: surgery-related risks have decreased and the confusion that was made between the risks of vaginal delivery and those of trial of labor has to be clarified to show that maternal mortality and morbidity are not increased by elective CS. However, instrumental delivery and CS during labor remain two situations at high risks both for the mother and her fetus. There is also an association between the increase in the CS rate and the decrease in perinatal mortality and morbidity, but this effect would only become clinically significant after a dramatic increase in the CS rate: this is the preventile principle of "marginal death". Numerous articles have been published reporting on the effects of vaginal delivery for the pelvic floor: urinary incontinence, pelvic organ prolapse, and especially fecal incontinence. All these publications concluded that CS has a protective effect. The rising duty to provide information to patients in high risk obstetrical situations such as a history of CS also contributes to the overall increase in CS rate mainly through the elective CS rate. Indeed, when faced with the alternative choices of potentially severe complications either for themselves or their child, women are likely to choose what appears to be the safest mode of delivery for their child and thus to opt for a CS. Finally, widespread delivery of information to the patients about trial of labor itself and the risks of vaginal delivery is the first step towards a "principle of preference", which consists in giving an important place to the patient's choice in the decision-making process, and thus to recognize her right to ask for an elective CS.

Caesarean section on request: a survey in The Netherlands

OBJECTIVE

To determine the opinion of Dutch gynaecologists and registrars on caesarean section (CS) on request.

STUDY DESIGN

Anonymous postal survey.

METHODS

A structured survey was send to all 900 gynaecologists and registrars in The Netherlands. They were asked to what extent they were willing to accept a request for an elective caesarean section, without evident medical reason. The survey contained eight simulated cases in which the reason for this request differed (obstetrical history and course of the present pregnancy). In two cases, there was no medical indication at all to perform a caesarean section; and in a third case caesarean section was due to excessive maternal weight relatively contraindicated.

RESULTS

The response rate was 65%. Willingness to perform an elective caesarean section ranged from 17 to 81% between the cases. Main reasons to perform a caesarean section were: (a). autonomy; (b). an unfavourable course of delivery in the absence of motivation for a natural childbirth; (c). litigation. The main reasons to refuse a request for a caesarean section were: (a). higher maternal morbidity and mortality; (b). no indication for caesarean section. A logistic regression analysis on personal characteristics showed that an experienced doctor is more willing to perform an elective caesarean section then a consultant or registrar with limited experience. The sex of the doctor was of no influence and the same held for the University at which they had been trained. Furthermore, it seems that doctors are more willing to accept the request if it is based upon unfounded, but understandable fear.

CONCLUSION

In The Netherlands, a woman can always find a gynaecologist willing to perform a caesarean section for non medical reasons. This willingness increases with the age of the doctor. There is a need for guidelines when handling these cases.