Benefits and risks of episiotomy: a review of the English-language literature since 1980. Part I

[Evolution of the rate of episiotomies and obstetric anal sphincter injuries since the last recommendations of 2018]

OBJECTIVES

There is a progressive reduction in the rate of episiotomies since the recommendations of the French college of gynaecologists. Our objective was to study the evolution of the rate of episiotomies and Obstetric Anus Sphincter Injury (OASI) since the restriction of episiotomies in our department.

METHODS

Observational monocentric retrospective study performed at the Rouen University Hospital. The inclusion criteria were monofetal pregnancies, delivery at a term greater than or equal to 37 weeks of amenorrhea of a living, viable child and by cephalic presentation. We compared two periods corresponding to before and after the 2018 recommendations. We used logistic regression modelling to identify factors associated with the risk of episiotomies and of obstetrical anal injuries, overall and in case of instrumental delivery.

RESULTS

We included 3329 patients for the 1st period and 3492 for the 2nd period, and the rate of instrumental deliveries were respectively of 16.4% (n=547) and 17.9% (n=626). Multivariate analysis showed a significant decrease in the rate of episiotomies in the 2nd period (OR 0.14, CI 95% [0.12; 0.16], P<0.0001). Main factors associated with the risk of OASI were primiparity (OR 6.21, CI 95% [3.19; 12.11]) and the use of forceps (OR 4.23, CI 95% [2.17; 8.27]) overall; and instrumental delivery using forceps (OR 3.25, CI 95% [1.69; 6.22]) and delivery during the 2nd period (OR 1.98, CI 95% [1.01; 3.88]) in case of instrumental delivery.

CONCLUSIONS

Our study confirms that the voluntary reduction in the episiotomy rate does not seem to be associated with an increased risk of OASI, overall and in case of instrumental delivery. However, we show an increase in the rate of OASI in case of instrumental delivery since the latest recommendations.

A novel obstetrical surgical intervention - New episiotomy: Case series study

OBJECTIVES

To establish anatomical structures responsible for creating a resistance force on a fetal head during vaginal delivery at term; to develop a new episiotomy to widen the vaginal outlet.

DESIGN

A prospective observational case series study.

SETTING

International centers.

POPULATION

Eighteen consecutive women at term during vaginal delivery.

METHODS

V-shape excision made on the hymeneal membrane, hymeneal ring, and hymeneal plate without extending an incision to the posterior perineal structures. Outlectorrhaphy (repairing the vaginal outlet to repair the surgical defect. Excisional specimens are subjected to histological examinations.

MAIN OUTCOME MEASURES

The primary maternal outcome measures were postpartum posterior perineum pain associated with vaginal outlectomy. The secondary outcomes measured a) complication of vaginal outlectomy; b) occurrence of dyspareunia after vaginal outlectomy; c) applicability of vaginal outlectomy; d) neonatal outcome measured by an APGAR score to show how the neonate tolerated the vaginal delivery process with vaginal outlectomy implementation.

RESULTS

The V-shape excision widened the vaginal outlet sufficiently for a vaginal delivery without a perineal incision. Outlectorrhaphy requires two or three simple interrupted sutures to close surgical defects and eliminate the vaginal gapping appearance. Eleven out of eighteen women were primigravida (61.1 %), and four multiparas (38.9 %) delivered a live newborn vaginally with a newly developed vaginal outlectomy. A median newborn's weight was 350 g ± 250 g, and APGAR scores at 5 min were median of 9 ± 1. One out of eighteen patients experienced extension of the skin, perineal fascia, and bulbospongiosus muscle. Bleeding from the extension tearing of vaginal outlectomy was heavier than from uncomplicated vaginal outlectomy but negligible. Immediately postpartum, patients reported no moderate or severe perineal pain. At a 3-month postpartum, none of the subjects reported superficial or deep dyspareunia. Histology from the vaginal outlectomy specimens described the direct connection of the longitudinal vaginal smooth muscles to the hymeneal plate and compact connective tissues (like cartilage) of the hymeneal ring. Additionally, the histological examination showed the absence of the perineal skeletal muscle within the vaginal outlectomy specimens.

CONCLUSIONS

The vaginal outlet is responsible for the most vital resistance force on a fetal head during delivery. Vaginal outlectomy widens the vaginal outlet sufficiently for a fetal vaginal birth with minimal bleeding and is easy to repair. No moderate-severe perineal pain or dyspareunia occurred in this study group.

TWEETABLE ABSTRACT

Vaginal outlectomy eliminates postpartum moderate-to-severe perineal pain and superficial dyspareunia. The posterior perineum creates no resistance force on the fetal head during vaginal delivery to warrant incision.

Ignoring international alerts? The routinization of episiotomy in France in the 1980s and 1990s

As scientific evidence from the UK and the USA in the 1980s was questioning the usefulness of episiotomy, the rate in France increased from 38% in 1981 to 58.4% in 1996. In 1996, the World Health Organization recommended limiting the episiotomy rate to 10%. This article aims to examine this paradox through an analysis of the French medical debate on episiotomy during the 1980s and 1990s. Drawing on an analytical corpus composed of 192 articles published in French professional journals of obstetrician-gynaecologists and midwives, it shows that the majority of these health professionals considered episiotomy to be a preventive intervention. The most influential professional organizations and experts manage to refute most of the international alerts on the limitations and side effects of episiotomy through the constant production of new justifications and competing knowledge for the procedure. In the 1980s, episiotomy was seen as a means to prevent tearing and thus avoid perineal dysfunction. Episiotomy and perineal re-education (which developed into a new health sector) were put forward as 'the' solution to the problem. From the mid-1990s onwards, the focus shifted from the mother to the baby as episiotomy was promoted as a way to reduce the risk of newborn mortality and morbidity. This article shows that the alerts and controversies on the assumed iatrogenic effects of biomedical technologies and practices were silenced through efficient and dynamic production of competing knowledge about their assumed benefits.

Socio-historical evolution of the episiotomy practice: A literature review

Episiotomy is an enlargement of the vaginal orifice made by a surgical incision of the perineum. This review aimed to provide a socio-historical retrospective on the practice or episiotomy. Using the criteria from the PRISMA guidelines, the authors conducted a literature review, browsing twenty databases and several papers available in the gray literature. Sixty-four articles, seven reports, and fifteen books were selected. Through this study, four eras with different approaches to episiotomy practice could be identified: 1792-1920, 1920-1980, 1980-1996, and 1996-2018. This review shows that institutionalization and medicalization of birth lead to a systematic practice of episiotomy in many westernized countries until 1996. Lay questioning and evidence-based medicine may have reversed this trend into a restrictive practice. After making an inventory of the factors associated with the evolution of change in the rate of episiotomies, the review finally revealed that evolution of the practice of episiotomy has also been influenced by ideological, political, and social factors.

[Fetal expulsion: Which interventions for perineal prevention? CNGOF Perineal Prevention and Protection in Obstetrics Guidelines]

OBJECTIVE

The objective for all obstetricians and midwifes who intervene during the release of the fetal presentation is to prevent at best the perineal lesions. This work consisted in analyzing the literature, researching and evaluating interventions that reduce this perineal risk during the release.

METHODS

A keyword search for each medical intervention during the expulsion phase was conducted by selecting studies assessing perineal risk. Interventions during pregnancy and during delivery before the expulsion phase were specifically addressed in other sections of the recommendations.

RESULTS

Firstly, the degree of perineal stretching during the second stage of labour does not appear to be a risk factor for OASIS, postpartum incontinence, or sexual disorders (LE3) and that a substantial stretching of the perineum is not an indication of episiotomy (Professional consensus). Then, manual control of the expulsion of the fetus at the end of the second stage of labour and support of the posterior perineum during this time appear to reduce the rate of OASIS (LE3). The crowning of the baby's head should be manually controlled and the posterior perineum manually supported manually to reduce the risk of OASIS (GradeC). There is no recognised benefit to episiotomy in normal deliveries (LE1); the liberal practice of episiotomy results in fewer intact perineums than its restrictive practice, and the latter does not result in increasing the number of cases of OASIS. No evidence indicates that an episiotomy for women with a breech presentation, twin pregnancy, or posterior position prevents OASIS (LE3). Indication for episiotomy during delivery depends on individual risk factors and obstetric conditions (Professional consensus). It is recommended that the indication for episiotomy be explained and the woman's consent received before its performance. The performance of an episiotomy during normal deliveries is not recommended to reduce the risk of OASIS (Grade A). The liberal practice of episiotomy to prevent OASIS is not recommended for women with a breech presentation, twin pregnancy, or posterior position (GradeC). Episiotomy during an instrumental delivery appears to be associated with a reduction of the risk of OASIS (LE3). The vacuum extractor appears to induce fewer cases of OASIS than other instruments (LE3). Episiotomy may be indicated in instrumental deliveries to avoid OASIS (GradeC). Training in perineal protection in obstetrics is recommended (Grade B). In operative vaginal deliveries when several instruments can be used, a vacuum extractor is preferentially recommended to reduce the risk of OASIS (GradeC). When forceps or spatulas are used, it is preferable that they be withdrawn just before cephalic deflexion so that the fetal head is not "capped" with these instruments at birth (Professional consensus). Couder's maneuver, which consists of lowering the forearm during the release of the fetal shoulders, appears to decrease the rate of second-degree perineal tears and increase the rate of intact perineum (LE3).

CONCLUSION

Manual control of the expulsion and perineal support reduce the risk of perineal injury. There is no benefit to episiotomy in normal delivery, nor in special cases such the breech presentation for example. On the other hand, in case of instrumental delivery, an episiotomy may be indicated to avoid OASIS (GradeC), and it is recommended if it is possible to use the ventouse preferentially. The Couder's maneuver seems to reduce the rate of 2^nd degree perineal lesions (LE3). Finally, training in perineal obstetric protection is recommended (Grade B).

Statistical trends of episiotomy around the world: Comparative systematic review of changing practices

The authors' purpose for this article is to identify, review and interpret all publications about the episiotomy rates worldwide. Based on the criteria from the PRISMA guidelines, twenty databases were scrutinized. All studies which include national statistics related to episiotomy were selected, as well as studies presenting estimated data. Sixty-one papers were selected with publication dates between 1995 and 2016. A static and dynamic analysis of all the results was carried out. The assumption for the decline in the number of episiotomies is discussed and confirmed, recalling that nowadays high rates of episiotomy remain in less industrialized countries and East Asia. Finally, our analysis aims to investigate the potential determinants which influence apparent statistical disparities.

[The practice of episiotomy in France 10 years after the recommendations of CNGOF: What inventory?]

Since its creation, the practice of episiotomy has evolved, being influenced by several factors. Various stances on its use were stated, until the eventual reduction of this practice, as suggested by numerous practical guides. In 2005, the National College of Obstetricians and Gynecologists in France published its French Guidelines for Clinical practice in this area. Today, it seems appropriate to focus on the evolution of the use of episiotomy, ten years after the publication of these recommendations. The authors propose a literature review, browsing through all the available epidemiological data in France related to episiotomy, recording all national statistics and some local trends, as there are regional specificities. This review allows to follow the overall evolution of the practice of episiotomy in France between 1981 and 2014, and to identify territorial disparities. Finally, in the specific context of the practice of episiotomy in French gynecological and obstetrics field, the authors conclude it by considering the possible evolution of this surgical practice, as well as, the Clinical Practice Recommendations related to it.

The EpiNo® Device: Efficacy, Tolerability, and Impact on Pelvic Floor-Implications for Future Research

Aims. The aim of this review is to provide a comprehensive overview of the available literature on preventing perineal trauma with the EpiNo. Methods. We perfomed a literature research in the MedLine and EMBASE databases for studies referring to EpiNo published between 1990 and 2014, without restrictions for language and study type. Results. Five published studies were identified, regarding the effect of EpiNo on the rate of episiotomy and perineal tears, pelvic floor muscle function, and fetal outcome. The device seems to reduce episiotomy and perineal tears' rate, as well as the risk for levator ani microtrauma and avulsion, though not always statistically significant. It does not seem to have an effect on duration of second stage of labour and fetal outcome. The device is well tolerated and the adverse events are rare and mild. However, design and reporting bias in the reviewed articles do not allow evidence based conclusions. Conclusions. The EpiNo device seems to be promising, with potential positive effects on natural birth, while being uncomplicated to use and without major complications. Well designed, randomized trials are needed in order to understand the effects of EpiNo on pelvic floor and make evidence based recommendations on its use.

Effect of vaginal delivery on the external anal sphincter muscle innervation pattern evaluated by multichannel surface EMG: results of the multicentre study TASI-2

INTRODUCTION AND HYPOTHESIS

A correlation exists between external anal sphincter (EAS) damage during birth and the subsequent development of fecal incontinence. This study evaluated the effect of delivery-related trauma on EAS innervation by means of intra-anal EMG performed with a rectal probe with 16 silver electrodes equally spaced along the circumference, before and after delivery.

METHODS

Pre-partum EMG measurements were performed on 511 women, by nine clinical partners from five European countries at the 28th to 34th gestational weeks and the 6th to 8th post-delivery weeks; 331 women returned, after delivery, for the second test. The innervation zones (IZ) of EAS single motor units were identified by means of an EMG decomposition algorithm.

RESULTS

The subjects were divided into four groups according to the delivery mode (Caesarean, vaginal with no evident damage, spontaneous lacerations and episiotomies). The number of IZs before and after delivery was compared. In the 82 women who underwent right mediolateral episiotomy, a statistically significant reduction of IZs was observed, after delivery, in the right ventral quadrant of the EAS (side of the episiotomy). Women who had Caesarean section, spontaneous lacerations or lack of evident damage did not present any significant change in the innervation pattern.

CONCLUSIONS

Right episiotomy reduces the number of IZs on the right-ventral side of the EAS. The fast and reliable test proposed indicates the sphincter innervation pattern before delivery and helps obstetricians to evaluate the risks and to choose the preferred side of the episiotomy, if deemed necessary at the time of delivery.

The effect of episiotomy on pelvic organ prolapse assessed by pelvic organ prolapse quantification system

OBJECTIVE

This study aimed to assess the association between episiotomy and measures of pelvic organ prolapse quantification system (POP-Q) in a cohort of women with vaginal parturition.

STUDY DESIGN

A prospective study was conducted with 549 eligible patients with vaginal delivery history. Women who were pregnant, gave birth within the preceding 6 months period, had a known history of pre-pregnant prolapse, had a history of hysterectomy or any operation performed for pelvic organ prolapsus and stress urinary incontinence, refused to participate and to whom POP-Q examination could not be performed (due to anatomic or orthopedic problems) were excluded. Patients were categorized as women with episiotomy and without episiotomy. The degree of genital prolapse was assessed by using POP-Q system. The effect of episiotomy on overall POP-Q stage and individual POP-Q points was calculated with logistic regression.

RESULTS

439 patients had a history of episiotomy whereas 110 patients had no episiotomy. 38.2% of women without an episiotomy, and 32.0% of women with episiotomy had genital prolapse determined by POP-Q system. There was no statistically significant association between episiotomy and POP-Q stage (AOR, -0.24; 95% CI, -0.65-0.18, P=0.26). Episiotomy was found among the independent predictors for certain POP-Q points such as Bp, perineal body (pb) and total vaginal length (tvl). Episiotomy was negatively correlated with prolapse of Bp and with pb and tvl.

CONCLUSION

Episiotomy had an effect on certain POP-Q indices, but had no influence on overall POP-Q stage.

The use of episiotomy in a low-risk population in the Netherlands: a secondary analysis

BACKGROUND

To examine the episiotomy incidence and determinants and outcomes associated with its use in primary care midwifery practices.

METHODS

Secondary analysis of two prospective cohort studies (n = 3,404).

RESULTS

The episiotomy incidence was 10.8 percent (20.9% for nulliparous and 6.3% for parous women). Episiotomy was associated with prolonged second stage of labor (adj. OR 12.09 [95% CI 6.0-24.2] for nulliparous and adj. OR 2.79 [1.7-4.6] for parous women) and hospital birth (adj. OR 1.75 [1.2-2.5] for parous women). Compared with episiotomy, perineal tears were associated with a lower rate of postpartum hemorrhage in parous women (adj. OR 0.58 [0.4-0.9]). Fewer women with perineal tears reported perineal discomfort (adj. OR 0.35 [0.2-0.6] for nulliparous and adj. OR 0.22 [0.1-0.3] for parous women). Among nulliparous women episiotomy was performed most frequently for prolonged second stage of labor (38.8%) and among parous women for history of episiotomy or prevention of major perineal trauma (21.1%).

CONCLUSIONS

The incidence of episiotomy is high compared with some low-risk settings in other Western countries. Episiotomy was associated with higher rates of adverse maternal outcomes. Restricted use of episiotomy is likely to be beneficial for women.

Risk of episiotomy and perineal lacerations recurring after first delivery

BACKGROUND

To assess whether the presence of an episiotomy or spontaneous perineal trauma at the first delivery increases the risk of perineal trauma at the following one.

METHODS

We studied 2,695 women who gave birth twice at Virgen de las Nieves University Hospital of Granada, Spain. All second deliveries were from 2004 to 2011 and prenatal database records were used to obtain information about the first deliveries. All births, first and second, were single, vaginal, unassisted, and in a cephalic presentation. Two groups were made as follows: Intact perineum (no perineal trauma or first-degree spontaneous tear at the first delivery) and perineal trauma (episiotomy or second-degree or higher spontaneous tear at the first delivery). Both groups were compared according to the degree of perineal trauma at the second delivery.

RESULTS

Women included in the perineal trauma group were significantly older and a higher proportion was attended by a midwife with an obstetrician present in the delivery room. No differences were observed according to gestational age, epidural analgesia or fetal birth weight. Adjusting for these possible compounding factors and the year of birth, the risk of undergoing a second-degree or higher spontaneous tear at their next delivery was fivefold (adjusted OR 5.15, 95% CI 3.11-8.54), and the risk of undergoing an episiotomy in the second delivery was threefold (adjusted OR 3.20, 95% CI 2.19-4.69) for the perineal trauma group.

CONCLUSION

The risk of undergoing a spontaneous perineal tear or an episiotomy in the second delivery is increased by the practice of episiotomy in the first one.

Effectiveness of nitrous oxide for postpartum perineal repair: a randomised controlled trial

OBJECTIVE

To compare the effectiveness of self-administered 50% nitrous oxide and conventional infiltrative anaesthesia with 1% prilocaine hydrochloride in postpartum perineal repair.

STUDY DESIGN

A total of 100 women were prospectively enrolled and randomised to receive either infiltrative anaesthesia or a self-administered nitrous oxide mixture (Livopan(©)) for pain relief during postpartum perineal suturing. Besides data concerning anaesthesia, characteristics of patients and labour were documented for statistical analysis. Pain experienced during perineal repair was assessed using the short form of the McGill Pain Questionnaire (SF-MPQ).

RESULTS

Forty-eight women received nitrous oxide and 52 underwent perineal suturing after infiltrative anaesthesia. There were no statistically significant differences regarding maternal age, body mass index (BMI), duration of pregnancy and suturing time between the groups. The most frequent birth injury was second-degree perineal laceration in the study group [22/48; 46%] and episiotomy in the control group [18/52; 35%]. Pain experienced during genital tract suturing and patients' satisfaction showed no statistically significant differences between the groups. Thirty-seven women in the study group and 47 in the control group were satisfied with the anaesthesia during perineal repair and would recommend it to other parturients [37/48, 77% vs. 47/52, 90%; p=0.0699).

CONCLUSION

Nitrous oxide self-administration during genital tract suturing after vaginal childbirth is a satisfactory and effective alternative to infiltrative anaesthesia.

Risk factors and midwife-reported reasons for episiotomy in women undergoing normal vaginal delivery

PURPOSE

In Singapore, a developed Asian nation, a relatively high proportion of women undergo episiotomy. We assess risk factors and midwife-reported reasons for episiotomy among women undergoing normal vaginal deliveries (NVDs) conducted by midwives and ascertain the association between episiotomy and degree of perineal tear.

METHODS

Participants included 77 midwives from a high-volume delivery unit in Singapore. The study had three sequential phases: (1) medical record review of women undergoing NVDs conducted by midwives over a 1-month period to document the proportion with episiotomy; (2) focus group discussions with midwives to form a checklist of reasons for episiotomy; (3) checklist-based documentation of midwife-reported reasons for episiotomy and data collection on maternal, neonatal, practice and midwife factors, and degree of perineal tear among women undergoing NVDs conducted by midwives over a 2-month period. Risk factors for episiotomy were assessed through logistic regression.

RESULTS

Primiparity, advanced maternal age, Indian ethnicity, higher birth weight and older midwife age were associated with episiotomy. The most common midwife-reported reason for episiotomy among primiparous women was primiparity (55.1%), and among multiparous women was fetal distress (20.0%) and poor maternal effort (20.0%). All women with episiotomy sustained at least a second-degree perineal tear versus 27.1% among women without episiotomy.

CONCLUSION

Most midwife-reported reasons for episiotomy were not congruent with international practice guidelines. Women without episiotomy have lesser tears than those with episiotomy. Practice protocols and educational programs are needed to change episiotomy practice.

[A policy of selective episiotomy in a ward: an example of medical professional assessment]

OBJECTIVES

To reduce the episiotomy rates, according to the Clinical Practice Guidelines, of 2005, from the French College of Obstetricians and Gynaecologists.

PATIENTS AND METHODS

A cross sectional study was conducted, in the university hospital maternities (Maternity 1 and 2) with a retrospective record from medical files. Patients who had delivered in those maternities, by vaginal route, after 22 weeks amenorrhea were eligible. The global rate of episiotomy was analysed from 2006 to 2008. A descriptive clinical study was performed with a retrospective analysis (from July to December 2005 on 100 medical files and from July to December 2007 on 85 files). Besides, a study of episiotomy rate was conducted from 2006 to 2008. Improvement actions were developed between the two phases of assessment of the audit: sharing and comparing the results to standardized episiotomy rates, and elaborating an informatized regional perinatality file with episiotomy related items and national recommendations.

RESULTS

Episiotomy rate decreased during the study, from 22.35% in 2005 to 19.34% in 2008, in the Ward 1 (p<0.0001) and from 33.62% in 2005 to 17.93% en 2008 (p<0.0001) in the Ward 2. An improvement was observed between the two periods of audits, for each item of the chart but without statistical signification.

DISCUSSION AND CONCLUSION

Theses procedures have led to a positive impact on practices thanks to the work group and because of the politics of the perinatal network in favour of an episiotomy reduction. We hope these results could be improved in the future.

Diagnosis related groups and variations in resource use for child delivery across 10 European countries

Childbirth is one of the main causes of hospitalisation for women, accounting for about 5% of hospital activity in most Organisation for Economic Co-operation and Development countries. We analysed the factors that explain variations in resource use for child delivery in ten European countries. We compared the performance of three models for explaining the variations in resource use (log cost or length of inpatient stay) at patient and hospital level. The first model used only the DRGs to which child deliveries were coded (M(D) ), the second used a set of 'patient-level' and delivery specific explanatory variables (M(P) ), and the third model combined both sets of variables (M(F) ). Countries vary both in the number of DRGs and the criteria used to classify cases of child delivery (range: 3-8) and in the percentage of deliveries classified as 'delivery without complication' (range: 53-90%). The capacity of DRGs and patient level variables to explain cost variation for child birth ranges from 48% in Sweden to over 70% in Spain. There is room for improving current DRG classification in most countries, but this does not necessary imply multiplying the groups and/or complicating criteria. Countries with a higher number of DRGs do not always perform better.

Current approach to episiotomy: Inevitable or unnecessary?

An episiotomy is a surgical incision through the perineum made to provide sufficient area for the delivery of the infant. About 10 to 95% of women who deliver will have episiotomy depending on which part of the world they are having delivery.

Too early episiotomy causes extensive bleeding and too late episiotomy causes the excessive stretching of a pelvic floor and lacerations could not be prevented.

According to widely accepted arguments, there are many benefits of episiotomy for the neonate: prevention of injuries, shoulder dystocia and mental retardation of the infant. Benefits for the mother are: reduction of severe lacerations, prevention of sexual dysfunction, prevention of urinary and fecal incontinence. But those things could also be complications of episiotomy, if it is being used nonrestrictively. Some other complications are also extensive bleeding, hematoma or infection.

There are many different opinions in literature about using episiotomy restrictively or routinely, so it is the right doubt arisen: is it inevitable or unnecessary?

There is a wide variation in episiotomy practice, and the decision of performing it or not depends of actual clinical situation.

There is still a great need for continuous obstetrics education according to the evidence based guidelines for the patient’s safety.

[Does persistent occiput posterior position increase the risk of severe perineal laceration?]

OBJECTIVE

To assess the risk of severe perineal lacerations (III and IV degrees) during vaginal deliveries in occiput posterior position.

PATIENTS AND METHODS

We conducted a retrospective cohort study of 9097 vaginal deliveries in a teaching hospital's maternity between January 1st 2005 and December 31st 2008. Risk factors associated with tears of the 3rd or 4th degree were studied by a multivariate logistic regression.

RESULTS

Severe perineal lacerations occurred in 1.69% of cases (n=152) and did not significantly vary between 2005 and 2008. Parity was a protective factor (OR 0.42; P<0.001; IC(95%) 0.29-0.60) whereas instrumental extraction was associated with an increased risk: vacuum (OR 3.95; P<0.001, IC(95%) 2.23-7.00) and forceps (OR 3.55; P<0.001, IC(95%) 2.33-5.42). macrosomia. Risks were also increased in fetal macrosomia and episiotomy did not protect the mother (respectively OR 1.41 P<0.001, IC(95%) 1.19-1.68 and OR 1.73; P<0.001, IC(95%) 1.16-2.57). Persistent occiput posterior position was not significantly associated with an anal sphincter injury (OR=1.70 P=0.059; IC(95%) 0.98-2.94).

DISCUSSION AND CONCLUSION

In our series, occiput posterior position did not significantly impact the risk of severe perineal laceration. A manual rotation of the fetal head should be performed in case of associated risk factors.

Does mediolateral episiotomy decrease central defects of the anterior vaginal wall?

OBJECTIVE

This retrospective study investigates the effects of mediolateral episiotomy on the pelvic floor.

METHODS

Premenopausal women suffering from urinary incontinence/genital prolapse who delivered only by vaginal route were enrolled into the study. History of diabetes, morbid obesity (BMI > 40 kg/m(2)), vacuum/forceps extraction, perineal lacerations that warranted repair during labor and any pelvic surgery were the exclusion criteria. Evaluation of the patients included pelvic organ prolapse quantification scores, presence of stress incontinence, urethral hypermobility, and questionnaires were obtained for overactive bladder and anal incontinence symptoms. These data obtained from patients with the history of mediolateral episiotomy were compared with those of patients with no episiotomy or any other pelvic injury that warranted surgical repair.

RESULTS

Groups were identical by means of demographic data, POP-Q findings, signs and symptoms of the pelvic floor. However, in the MLE group, central defects on the anterior vaginal wall were less frequent.

CONCLUSION

According to the results of this retrospective study, MLE seems to prevent central defects on the anterior vaginal wall. Prospective randomized studies are needed to draw a sufficient conclusion.

Absorbable suture materials for primary repair of episiotomy and second degree tears

BACKGROUND

Approximately 70% of women will experience perineal trauma following vaginal delivery and will require stitches. This may result in pain, suture removal and superficial dyspareunia.

OBJECTIVES

To assess the effects of different suture materials on short- and long-term morbidity following perineal repair.

SEARCH STRATEGY

We searched the Cochrane Pregnancy and Childbirth Group's Trials Register (February 2010).

SELECTION CRITERIA

Randomised trials comparing different suture materials for perineal repair after vaginal delivery.

DATA COLLECTION AND ANALYSIS

Two review authors independently assessed trial quality and extracted data.

MAIN RESULTS

We included 18 trials with 10,171 women; comparisons included: catgut with standard synthetic (nine trials), rapidly absorbing synthetic (two trials), and glycerol impregnated catgut sutures (two trials); and standard synthetic sutures with rapidly absorbing synthetic (five trials) and monofilament sutures (one trial).Compared with catgut, standard synthetic sutures were associated with less pain up to three days after delivery (risk ratio (RR) 0.83, 95% confidence interval (CI) 0.76 to 0.90); and less analgesia up to ten days postpartum (RR 0.71, 95% CI 0.59 to 0.87). More women with catgut sutures required resuturing (15/1201) compared with synthetic sutures (3/1201) (RR 0.25, 95% CI 0.08 to 0.74); while more women with standard synthetic sutures required the removal of unabsorbed suture material (RR 1.81, 95% CI 1.46 to 2.24). Comparing standard synthetic with rapidly absorbing sutures, short- and long-term pain were similar; in one trial fewer women with rapidly absorbing sutures reported using analgesics at 10 days (RR 0.57, 95% CI 0.43 to 0.77). More women in the standard synthetic suture group required suture removal compared with those in the rapidly absorbed group (RR 0.24, 95% CI 0.15 to 0.36). There was no evidence of significant differences between groups for long-term pain (three months after delivery) or for dyspareunia at three, or at six to 12 months. When catgut and glycerol impregnated catgut were compared, results were similar for most outcomes, although the latter was associated with more short-term pain. One trial examining monofilament versus standard polyglycolic sutures found no differences for most outcomes.

AUTHORS' CONCLUSIONS

Catgut may increase short-term pain compared with synthetic sutures. There were few differences between standard and rapidly absorbing synthetic sutures but more women needed standard sutures removing. For other materials, there was insufficient evidence to draw conclusions. Findings should be interpreted in the context of the related Cochrane review on suturing techniques.

Effect of dyssynergic defecation during pregnancy on third- and fourth-degree tear during a first vaginal delivery: a case-control study

OBJECTIVE

Determine whether dyssynergic defecation is a risk factor for third- or fourth-degree tear during a first vaginal delivery.

STUDY DESIGN

A retrospective case-control study was conducted on 549 primiparous women. The case group (n = 140) sustained an anal sphincter tear and the control group (n = 409) had a perineal laceration lower or equal to a second-degree tear. The Knowles-Eccersley-Scott Symptom questionnaire identified women who had dyssynergic defecation. A logistic regression analysis was performed.

RESULTS

Anal sphincter tear were 2.94 times higher for women reporting dyssynergic defecation (P = .002; 95% confidence interval [CI], 1.47-5.88). Odds ratios (ORs) were also significant for forceps (P < .001; OR, 6.90; 95% CI, 3.27-14.59), vacuum extraction (P = .009; OR, 2.36; 95% CI, 1.17-4.76), median episiotomy (P = .009; OR, 2.71; 95% CI, 1.54-4.78), and high infant weight (P < .001; OR, 2.25 for each 500 g increase; 95% CI, 1.69-2.99).

CONCLUSION

Dyssynergic defecation seems to increase anal sphincter tear, but prospective studies are needed to confirm the association.

Evaluation of postpartum perineal pain and dyspareunia—A prospective study

OBJECTIVE

Postpartum perineal pain and dyspareunia have been reported to affect 42% of women within the first 2 weeks after their first vaginal delivery. We aimed to determine the prevalence of dyspareunia and perineal pain using validated pain scores following accurate classification of perineal trauma according to the guidelines of the Royal College of Obstetricians and Gynaecologists.

STUDY DESIGN

Prospective study of women having their first vaginal delivery. All women had a perineal and rectal examination. Pain was assessed with a 4-point Verbal Rating Score and an 11-point visual analogue scale on day 1, day 5 and 2 months after delivery.

RESULTS

Two hundred and fifty-four women were invited and 95% participated. Ninety-two percent experienced perineal pain on day one, resolving in 88% (p<0.001) at 2 months. Compared to an intact perineum or first degree tear significantly more women experienced perineal pain after a second, third or fourth degree tear. Forty percent resumed coitus within 2 months regardless of whether perineal trauma occurred or not. Five days after delivery, uncomplicated episiotomies resulted in more perineal pain than second degree tears.

CONCLUSIONS

Although perineal pain affected 92% of mothers, it resolved in the majority within 2 months of delivery. Obstetric anal sphincter injury is associated with more perineal pain than other perineal trauma. Spontaneous second degree tears cause less perineal pain than episiotomies. The 11-point visual analogue scale may be more sensitive than the 4-point Verbal Rating Score.

Selective vs routine midline episiotomy for the prevention of third- or fourth-degree lacerations in nulliparous women

OBJECTIVE

The purpose of this study was to determine whether selective midline episiotomy contributes to the prevention of third- or fourth-degree perineal lacerations.

STUDY DESIGN

A randomized controlled clinical trial was performed with 446 nulliparous women with deliveries after 28 weeks of pregnancy. Patients were randomized to undergo either routine episiotomy or selective episiotomy. In the selective episiotomy group, episiotomies were performed only in cases of imminent lacerations, fetal distress, or forceps delivery.

RESULTS

In the group of 223 patients who underwent routine episiotomy, 32 (14.3%) had third- or fourth-degree perineal lacerations, as compared to 15 (6.8%) in the group of 222 patients undergoing selective episiotomy (relative risk, 2.12; 95% confidence interval, 1.18-3.81). Only reduction in third-degree lacerations was significant when analyzed separately. Moreover, periurethral, labia minora, and superficial vaginal lacerations were significantly more frequent in the selective episiotomy group.

CONCLUSION

The policy of performing selective midline episiotomy in nulliparous patients results in a reduction in the risk of third-degree perineal lacerations.

Sexuality after delivery with episiotomy: a long-term follow-up

AIM

To investigate the quality of women's sex life 12-18 months after first, episiotomy-assisted childbirth and risk factors for long-term dyspareunia after childbirth.

METHODS

Two hundred and six women who gave birth vaginally at the Karolinska University Hospital between September 1997 and February 1998 and from June 1998 to January 1999 received postal questionnaires at 12-18 months postpartum. Obstetrical, psychological and sexological data, concerning 110 primiparae who underwent episiotomy and 153 age-matched women who did not, were compared. Possible risk factors for postpartum dyspareunia were investigated in the entire sample.

RESULTS

Women who underwent episiotomy experienced a more complicated and emotionally difficult delivery. They reported a higher frequency of dyspareunia and insufficient lubrication than women who had given birth without episiotomy. Arousal, orgasm and satisfaction with sex were not affected. Episiotomy, perineal lacerations, fundal pressure at delivery and a history of dyspareunia were independent risk factors for dyspareunia 12-18 months postpartum.

CONCLUSION

Episiotomy may affect women's sex life during the second year post partum with more frequent pain and vaginal dryness at intercourse. Other obstetrical factors and pain history may also influence the propensity for dyspareunia.

Mediolateral episiotomy reduces the risk for anal sphincter injury during operative vaginal delivery

OBJECTIVE

To determine the risk factors for anal sphincter injuries during operative vaginal delivery.

SETTING AND DESIGN

A population-based observational study.

POPULATION

All 21 254 women delivered with vacuum extraction and 7478 women delivered with forceps, derived from the previously validated Dutch National Obstetric Database from the years 1994 to 1995.

METHODS

Anal sphincter injury was defined as any injury, partial or complete, of the anal sphincters. Risk factors were determined with multivariate logistic regression analysis.

MAIN OUTCOME MEASURES

Individual obstetric factors, e.g. fetal birthweights, duration of second stage, etc.

RESULTS

Anal sphincter injury occurred in 3.0% of vacuum extractions and in 4.7% of forceps deliveries. Primiparity, occipitoposterior position and fetal birthweight were associated with an increased risk for anal sphincter injury in both types of operative vaginal delivery, whereas duration of second stage was associated with an increased risk only in vacuum extractions. Mediolateral episiotomy protected significantly for anal sphincter damage in both vacuum extraction (OR 0.11, 95% CI 0.09-0.13) and forceps delivery (OR 0.08, 95% CI 0.07-0.11). The number of mediolateral episiotomies needed to prevent one sphincter injury in vacuum extractions was 12, whereas 5 mediolateral episiotomies could prevent one sphincter injury in forceps deliveries.

CONCLUSIONS

Primiparity and occipitoposterior presentation are strong risk factors for the occurrence of anal sphincter injury during operative vaginal delivery. The highly significant protective effect of mediolateral episiotomies in both types of operative vaginal delivery warrants the conclusions that this type of episiotomy should be used routinely during these interventions to protect the anal sphincters.

The outcomes of midline versus medio-lateral episiotomy

BACKGROUND

Episiotomy is the surgical enlargement of the vaginal orifice by an incision of the perineum during the second stage of labor or just before delivery of the baby. During the 1970s, it was common to perform an episiotomy for almost all women having their first delivery, ostensibly for prevention of severe perineum tears and easier subsequent repair. However, there are no data available to indicate if an episiotomy should be midline or medio-lateral. We compared midline versus medio-lateral episiotomy for complication such as extended perineal tears, pain scores, wound infection rates and other complications.

METHODS

We conducted a prospective cohort including 1,302 women, who gave birth vaginally between April 2005 and February 2006 at Srinagarind Hospital - a tertiary care center in Northeast Thailand. All women included had low risk pregnancies and delivered at term. The outcome measures included deep perineal tears (including perineal tears with anal sphincter and/or rectum tears), other complications, and women's satisfaction at 48 hours and 6-weeks postpartum.

RESULTS

In women with midline episiotomy, deep perineal tears occurred in 14.8%, which is statistically significantly higher compared to 7% in women who underwent a medio-lateral episiotomy (p-value < 0.05). There was no difference between the groups for other outcomes (such as blood loss, vaginal hematoma, infection, pain, dyspareunia, and women's satisfaction with the method). The risk factors for deep perineal tears were: midline episiotomy, primiparity, maternal height < 145 cm, fetal birth weight > 3,500 g and forceps extraction.

CONCLUSION

Midline compared to medio-lateral episiotomy resulted in more deep perineal tears. It is more likely deep perineal tears would occur in cases with additional risk factors.

The role of maternal age and episiotomy in the risk of anal sphincter tears during childbirth

BACKGROUND

Many women who experience anal sphincter tear will suffer from anal incontinence. The most important tool to avoid this is to recognise the obstetric risk factors involved and thereby prevent injury.

AIMS

The aim of this study was to analyse and evaluate the risk factors of anal sphincter tear during delivery.

METHODS

Of a total of 57,943 vaginal deliveries, we identified 565 women with partial or total rupture of the anal sphincter and compared these women with 565 controls without sphincter tear with respect to possible risk factors.

RESULTS

Several factors were significantly associated with sphincter tears, including nulliparity, birthweight, instrumental delivery, episiotomy, malpresentation, maternal age and epidural analgesia. The importance of these variables was further confirmed in a stepwise logistic regression analysis. Age was found to be a significant risk factor only when the birthweight was less than 4000 g. Episiotomy more than doubled the risk of sphincter tear when delivery was non-instrumental.

CONCLUSION

There are several independent risk factors that should be considered when making decisions regarding delivery mode. Maternal age and episiotomy in non-instrumental delivery are two of these.

Is anterior genital tract trauma associated with complaints of postpartum urinary incontinence?

We evaluated whether anterior genital trauma is associated with urinary incontinence after vaginal birth. A prospective cohort of midwifery patients consented to mapping of trauma at birth and assessment of continence postpartum. Trauma was categorized into intact, anterior (periuretheral, clitoral, labial), perineal or both. Incontinence was defined as a positive response to the question, "Since the birth of your baby, have you leaked urine when you did not mean to?" and social impact assessed by the Incontinence Impact Questionnaire-7 (IIQ-7). Of 554 eligible women, 436 (79%) provided incontinence data 3 months postpartum. Genital trauma was common, occurring in 80% of women: in 148 (34%) trauma was anterior, 119 (27%) had both anterior and perineal trauma and 80(18%) had only perineal trauma. Since delivery, 27% (118/436) women leaked urine. Fewer had IIQ-7 scores greater than 0, at 55/436 (12%). Women with anterior trauma, 29/148 (20%), were less likely to complain of incontinence than all others, 89/288 (31%) (P = 0.01). Urinary incontinence is common after giving birth, although most women have mild symptoms. Anterior trauma is not associated with increased complaints of urinary incontinence.

Faecal incontinence

BACKGROUND

Faecal incontinence is a life style-limiting condition with multiple aetiologies. Surgical cure is not often possible.

METHODS AND RESULTS

A review of the literature was undertaken using Medline, Cochrane database and standard textbooks. Advanced imaging techniques now inform the treatment algorithm and objectively assess success. The long-term outcome of anal surgery is uncertain. Modern approaches favour conservative measures, such as biofeedback, and less invasive surgical procedures. Stoma formation is a definitive option for some patients.

CONCLUSION

Current treatment of faecal incontinence is evolving from a sphincter-focused view to a more holistic one, recognizing the influence of the pelvic floor and psyche in maintaining continence. Modern imaging modalities direct treatment strategies.

Are Routine Interventions Necessary in Normal Birth?

Routine interventions during labor and birth, such as perineal shaving and enemas before vaginal delivery, continuous intrapartum electronic fetal monitoring (EFM), and episiotomy are prevalent in Taiwan, but they may not always be necessary. Numerous studies investigating these interventions have failed to find absolute benefits for women with uncomplicated and low-risk pregnancies. No evidence-based benefits support routine perineal shaving or enemas during labor for reducing the risk of perineal wound infection or neonatal infection. The use of EFM is associated with an increased rate of operative interventions (vacuum, forceps, cesarean delivery) but does not result in a significant decrease in the incidence of perinatal death or cerebral palsy. Routine episiotomy does not have demonstrable advantages over restrictive episiotomy in the frequency or severity of perineal damage or pelvic relaxation.

Incidence and risk factors for severe perineal laceration after vaginal delivery in Japanese patients

OBJECTIVE

The aim of this study was to assess the frequency of severe perineal lacerations defined as either third- or fourth-degree lacerations during normal spontaneous vaginal delivery and to evaluate potential risk factors in Japanese patients.

MATERIALS AND METHODS

An electronic audit of the perinatal database at the Tama-Nagayama Hospital of Nippon Medical School and Yamaguchi Hospital from 1997 through 2004 was completed. Singleton vaginal vertex deliveries were analyzed for potential risk factors using univariate and multivariate logistic regression analysis.

RESULTS

From the database, 7,946 deliveries were identified, with 135 deliveries resulting in severe lacerations (1.7%). In the multivariate logistic regression analysis, severe lacerations were associated significantly with primiparous (odds ratio, 4.36; 95% CI, 2.17-9.57), oxytocin use (odds ratio, 2.19; 95% CI, 1.27-3.73), midline episiotomy (odds ratio, 4.68; 95% CI, 2.09-11.55), forceps-assisted delivery (odds ratio, 7.11; 95% CI, 1.95-20.59), vacuum-assisted delivery (odds ratio, 5.93; 95% CI, 3.38-10.36), and shorter attendant experience (odds ratio, 2.88; 95% CI, 1.12-9.81).

CONCLUSIONS

The present study demonstrated that operator factors, such as midline episiotomy, oxytocin use, assisted delivery and attendant experience, are independent risk for severe perineal lacerations after vaginal delivery in Japanese patients. The results suggest that midline episiotomy and assisted vaginal delivery, especially forceps-assisted delivery should be avoided in patients who are being delivered of a first child whenever possible.

Episiotomy: Beliefs, practice and the impact of educational intervention

OBJECTIVE

To assess the potential effect of educational intervention on episiotomy practice.

STUDY DESIGN

A survey of the attitude of obstetrical caregivers toward episiotomy was conducted among obstetricians and midwives in the three public hospitals in Haifa. Data regarding episiotomy rates was collected for the years 2001-2003. At the beginning of 2002, lectures on the risks and benefits of episiotomy were given in two hospitals. Episiotomy rates before and after the lecture were compared.

RESULTS

A significant and lasting reduction in episiotomy rates was observed in the two hospitals where lectures were given. There were no clinically significant and consistent changes in the episiotomy practices in the third hospital.

CONCLUSION

Education may play an important role in changing common medical practices, as in episiotomy. It was clearly shown that our beliefs are not always up to date. We call for periodic reassessment of all medical procedures, as common and accepted as they are.

Coding of Perineal Lacerations and Other Complications of Obstetric Care in Hospital Discharge Data

OBJECTIVE

To assess the validity of obstetric complications, including the Joint Commission on Accreditation of Healthcare Organizations (JCAHO) Core Measure on perineal lacerations, in the California Patient Discharge Data Set.

METHODS

We randomly sampled 1,611 deliveries from 52 of the 267 hospitals that performed more than 678 eligible deliveries in California in 1992-1993. We compared hospital-reported complications against our recoding of the same records.

RESULTS

Third- and fourth-degree perineal lacerations were reported accurately, with estimated sensitivities exceeding 90% and positive predictive values exceeding 65% (weighted to account for the stratified sampling design) or 85% (unweighted). Based on in-depth review of discrepant cases, we estimate the actual positive predictive value at over 90%. Most coding discrepancies were between no injury and first degree, or between first and second degree. Most postpartum complications, including urinary tract and wound infections, endometritis, anesthesia complications, and postpartum hemorrhage were reported with less than 70% sensitivity, but at least 80% positive predictive value. Composite measures from HealthGrades and Solucient, which include these complication codes, also suffer from high false-negative rates.

CONCLUSION

Third- and fourth-degree perineal lacerations are accurately reported on hospital discharge abstracts, confirming the validity of related quality indicators sponsored by the Agency for Healthcare Research and Quality and JCAHO. Administrative data seem less useful for monitoring other in-hospital postpartum complications.

Episiotomy and Vaginal Trauma

The era of routine episiotomy is gradually ending. Previously perceived benefits gradually have been disproved as evidence-based scientific clinical studies have shown the detrimental effects of episiotomy; however, circumstances always will exist in which prudent clinical judgment may dictate the necessity for an episiotomy. In most of these situations, however, an episiotomy often can be avoided. Perhaps more hospital perinatal review committees should evaluate episiotomy rates and strive to convince their staff to reduce their rates. We can learn to be more patient and allow the natural forces of labor to gradually stretch the perineum. In reviewing the extensive volume of published literature on episiotomy and perineal-vaginal trauma, the best advice lies in the dictum "Don't just do something, sit there!"