Fourth-degree Perineal Tears Research Articles

Perinatal outcomes in grand multiparous women stratified by parity- A large multicenter study

ObjectiveTo assess the effect of each additional delivery among grand multiparous (GMP) women on maternal and neonatal outcomes. MethodsA multi-center retrospective cohort study that examined maternal and neonatal outcomes of GMP women (parity 5–10, analyzed separately for each parity level) compared to a reference group of multiparous women (parity 2–4). The study population included grand multiparous women with singleton gestation who delivered in one of four university-affiliated obstetrical centers in a single geographic area, between 2003 and 2021. We excluded nulliparous, those with parity > 10 (due to small sample sizes), women with previous cesarean deliveries (CDs), multifetal gestations, and out-of-hospital deliveries. The primary outcome of this study was postpartum hemorrhage (PPH, estimated blood loss exceeding 1000 ml, and/or requiring blood product transfusion, and/or a hemoglobin drop > 3 g/Dl). Secondary outcomes included unplanned cesarean deliveries, preterm delivery, along with other adverse maternal and neonatal outcomes. Univariate analysis was followed by multivariable logistic regression. ResultsDuring the study period, 251,786 deliveries of 120,793 patients met the inclusion and exclusion criteria. Of those, 173,113 (69%) were of parity 2–4 (reference group), 27,894 (11%) were of parity five, 19,146 (8%) were of parity six, 13,115 (5%) were of parity seven, 8903 (4%) were of parity eight, 5802 (2%) were of parity nine and 3813 (2%) were of parity ten.GMP women exhibited significantly higher rates of PPH starting from parity eight. The adjusted odds ratios (aOR) were 1.19 (95 % CI: 1.06–1.34) for parity 8, 1.17 (95 % CI: 1.01–1.36) for parity 9, and 1.39 (95 % CI: 1.18–1.65) for parity 10. Additionally, they showed elevated rates of several maternal and neonatal outcomes, including placental abruption, large-for-gestational age (LGA) neonates, neonatal hypoglycemia, and neonatal seizures. Conversely, they exhibited decreased risk for other adverse maternal outcomes, including preterm deliveries, unplanned cesarean deliveries (CDs), vacuum-assisted delivery, and third- or fourth-degree perineal tears and small-for-gestational age (SGA) neonates. The associations with neonatal hypoglycemia, and neonatal seizure were correlated with the number of deliveries in a dose-dependent manner, demonstrating that each additional delivery was associated with an additional, significant impact on obstetrical complications. ConclusionOur study demonstrates that parity 8–10 is associated with a significantly increased risk of PPH. Parity level > 5 correlated with increased odds of placental abruption, LGA neonates, neonatal hypoglycemia, and neonatal seizures. However, GMP women also demonstrated a reduced likelihood of certain adverse maternal outcomes, including unplanned cesarean, preterm deliveries, vacuum-assisted deliveries, SGA neonates, and severe perineal tears. These findings highlight the importance of tailored obstetrical care for GMP women to mitigate the elevated risks associated with higher parity.

Practical use of transanal decompression tube following the repair of fourth-degree perineal tears associated with vaginal delivery

BackgroundFourth-degree perineal tears associated with vaginal delivery (PTAVD) occur in approximately 0.25 to 6% of vaginal deliveries. A persistent challenge in treating fourth-degree PTAVD is the high incidence of anastomotic leakage, leading to impaired quality of life, marked by incontinence, rectovaginal fistula, and painful sexual intercourse. Thus, effective interventions are necessary. Herein, we report our successful approach in repairing a fourth-degree PTAVD, involving the placement of a transanal decompression tube (TDT) during the early postoperative period.Case presentationFive patients underwent the repair of fourth-degree PTAVD by suturing the mucosal and muscular layers of the rectum, and the vaginal wall in layers. Subsequently, a TDT was placed in the rectum, positioned 10–15 cm from the anal verge. The TDT was allowed to drain spontaneously without suction. Gastrografin enema examination was performed through a TDT, followed by a computed tomographic scan on postoperative days 3–4. After unfavorable complications were ruled out, the TDT was removed and the patients were transitioned to a normal diet.ResultAll patients showed favorable outcomes with no occurrence of vaginal fistula or incontinence.ConclusionThis simple intervention demonstrates potential efficacy in reducing anastomotic leakage following the repair of fourth-degree PTAVD.

The association between BMI, episiotomy, and obstetric anal sphincter injuries (OASIS) in singleton vaginal deliveries

ObjectivePrevalence of obesity in reproductive age and pregnant women has been on the rise during the past several decades. The relationship between body mass index (BMI) and obstetric anal sphincter injuries (OASIS) or episiotomy has not yet been thoroughly investigated. The objective of this study was to shed light on this issue. MethodsThis retrospective cohort study was performed using electronic database of an obstetrics department at a university-affiliated tertiary medical center. All spontaneous singleton vaginal deliveries at term between January 2015 and December 2021 were included. The primary outcome was the incidence of OASIS (third- and fourth-degree perineal tears) and obesity. These were compared across three BMI categories: normal (BMI below 25 kg/m2), overweight (BMI 25.0–29.9 kg/m2), and obesity (BMI of 30 kg/m2 and over). ResultsOf the overall 13,932 spontaneous vaginal deliveries identified, 34.7 % had BMI in the normal range, 43.1 % were overweight, and 25.4 % were obese. Multivariate analysis demonstrated lower rates of OASIS in obese (OR 0.2, 95 %CI 0.04–0.9) and in overweight (OR 0.3, 95 %CI 0.1–0.99) women, as compared to the normal-weight cohort. In addition, lower rates of episiotomy were noted in the obese cohort (OR 0.7, 95 %CI 0.6–0.8). ConclusionsDecreased incidence of OASIS was noted in women with obesity, in conjunction with lower use of episiotomy. These findings imply that obstetrics clinics might consider a more conservative approach to episiotomy in obese patients.

Massive postvaginoplasty retrovaginal hematoma: A case report

Case presentation: A para 4+0 with a history repeated of macrosomic fetuses and four subsequent spontaneous vaginal deliveries highlighted by third- and fourth-degree perineal tears presented with vaginal laxity requiring surgical vaginoplasty. Postoperatively, she developed acute urinary retention, weakness, lethargy, and pallor and was noted to have a massive posterior vaginal wall hematoma, which was soon evacuated, and vaginoplasty was successfully revised. Discussion: Urinary retention is a unique symptom of retrovaginal hematoma, but it must be considered following vaginoplasty. During vaginoplasty, the posterior vaginal wall expands to abut the anterior vaginal wall and inferior urethral wall, preventing evacuation of the bladder. The posterior vaginal wall is elastic and able to discretely accommodate a large amount of blood loss with no signs of vaginal bleeding and should be a point of examination following vaginoplasty. Conclusion: The expected signs and symptoms of vaginoplasty complications are vaginal bleeding and perineal tenderness. Urinary retention, pallor, and other signs can indicate a retrovaginal hematoma. Cosmetic gynecology practitioners should consider the elasticity and discreetness of the posterior vaginal wall and its ability to accommodate massive hematomas with few signs.

Prevalence and Risk Factors of Third-and Fourth-degree Perineal Tears During Vaginal Delivery Among Women in Qom, Iran

Prevalence and Risk Factors of Third-and Fourth-degree Perineal Tears During Vaginal Delivery Among Women in Qom, Iran

The Incidence and Risk Factors of Third- and Fourth-Degree Perineal Tears in Ministry of Health in Bahrain over 5 Years

The Incidence and Risk Factors of Third- and Fourth-Degree Perineal Tears in Ministry of Health in Bahrain over 5 Years

Predicting perineal trauma during childbirth using data from a general obstetric population.

Perineal trauma is a common complication of childbirth and can have serious impacts on long-term health. Few studies have examined the combined effect of multiple risk factors. We developed and internally validated a risk prediction model to predict third and fourth degree perineal tears using data from a general obstetric population. Risk prediction model using data from all singleton vaginal deliveries at Cork University Maternity Hospital (CUMH), Ireland during 2019 and 2020. Third/fourth degree tears were diagnosed by an obstetrician or midwife at time of birth and defined as tears that extended into the anal sphincter complex or involved both the anal sphincter complex and anorectal mucosa. We used univariable and multivariable logistic regression with backward stepwise selection to develop the models. Candidate predictors included infant sex, maternal age, maternal body mass index, parity, mode of delivery, birthweight, post-term delivery, induction of labour and public/private antenatal care. We used the receiver operating characteristic (ROC) curve C-statistic to assess discrimination, and bootstrapping techniques were used to assess internal validation. Of 8,403 singleton vaginal deliveries, 8,367 (99.54%) had complete data on predictors for model development. A total of 128 women (1.53%) had a third/fourth degree tear. Three variables remained in the final model: nulliparity, mode of delivery (specifically forceps delivery or ventouse delivery) and increasing birthweight (per 100 gram increase) (C-statistic: 0.75, 95% CI: 0.71, 0.79). We developed a nomogram to calculate individualised risk of third/fourth degree tears using these predictors. Bootstrapping indicated good internal performance. Use of our nomogram can provide an individualised risk assessment of third/fourth degree tears and potentially aid counselling of women on their potential risk.

Do neonatal birth weight thresholds for labor dystocia outcomes differ between short and normal stature women?

To determine if there is a correlation between maternal short stature and neonatal birth weight among women with adverse outcomes related to labor dystocia. The medical records of singleton deliveries with adverse obstetric outcomes related to labor dystocia during 2014-2020, in a single tertiary center, were reviewed. Outcomes included at least one of the following: cesarean delivery (CD) due to cephalopelvic disproportion (CPD), prolonged second stage, shoulder dystocia, third- or fourth-degree perineal tear. Maternal short stature was defined as height below the 10th centile (short stature group) and normal stature was defined as maternal height between the 10th and 90th centiles (normal stature group). Maternal and neonatal characteristics were compared between the groups. A total of 3295 women were included, among them, 307 in the short stature group (9.3%, height 1.52 ± 0.02 m) and 2988 in the normal stature group (90.7%, height 1.63 ± 0.04 m). Evaluating the entire cohort revealed similar neonatal birth weights comparing the short and normal stature groups. A subgroup analysis of women after CD due to CPD (n = 296) revealed lower neonatal birth weights in the short stature group (n = 31) compared with the normal stature group (n = 265) (3215 ± 411 vs 3484 ± 427 g, P = 0.001, respectively). Multivariable linear regression was performed for women who underwent CD due to CPD. After adjusting for obesity and diabetes mellitus, short stature and nulliparity were found to be independently associated with decreased neonatal birth weight (266 g less for short stature, P = 0.001, and 294 g less for nulliparity, P = 0.001). Among women with short stature, CD due to CPD occurs at lower neonatal birth weights.

Six compared with 12 hours of Foley balloon placement for labor induction in nulliparous women with unripe cervices: a randomized controlled trial

Planned 6 versus 12 hours placement of the double-balloon catheter shortens the induction to delivery interval. The Foley catheter is low-cost and has at least comparable effectiveness to the proprietary double balloon labor induction devices. 6 hours placement with the Foley balloon in nulliparas has not been evaluated. To evaluate 6 vs 12 hours Foley balloon placement for cervical ripening in the labor induction of nulliparas. A randomized controlled trial was conducted in University Malaya Medical Center from January 2022 to August 2022. Nulliparas aged 18 years or above, with a term, singleton pregnancy in cephalic presentation, intact membranes, reassuring fetal heart rate tracing, unripe cervix, without any significant contractions, were recruited at admission for labor induction. Participants were randomized after successful Foley balloon insertion, for the balloon to be left passively in place for 6 or 12 hours, then removed to check for a ripened cervix. Amniotomy was performed once the cervix had ripened followed by titrated oxytocin infusion to expedite labor and delivery. Primary outcome was the induction to delivery interval. Secondary outcomes were mostly from the core outcome set (CROWN) for induction of labor trial reporting1 such as change in Bishop score after intervention, use of additional method for cervical ripening, time to delivery after double-balloon device removal, mode of delivery, indication for cesarean section, duration of oxytocin infusion, blood loss during delivery, presence of third- or fourth-degree perineal tear, maternal infection, maternal satisfaction regional analgesia in labor, length of hospital stay, Intensive Care Unit (ICU) admission, cardiorespiratory arrest, need for hysterectomy. The neonatal outcomes are Apgar score at 1 and 5 minutes, neonatal ICU (NICU) admission, cord pH, neonatal sepsis, fetal birth weight, birth trauma, hypoxic ischemic encephalopathy or need for therapeutic hypothermia. Data were analyzed with the t-test, Mann-Whitney U test, Chi square test and Fisher exact test as appropriate for the data type. 240 women were randomized, 120 to each arm. The induction to delivery interval was median[interquartile range] 21.3[16.2-27.9] vs 26.0[21.5-30.9] hours P<0.001 for 6 vs 12 hours placement respectively. Of the secondary outcomes, the sequential use of additional cervical ripening agent (mostly Foley reinsertion) was 33/19(27.5%) vs 17/120(14.2%) RR 1.94 95% CI 1.15-3.29 p=0.011, Bishop score increase was 3[2-3.75] vs 3[2.25-4] p=0.002 and rate of recommendation to a friend was 83/118(70.3%) vs 101/119(84.9%) RR 0.83 95% CI 0.72-0.95 p=0.007 for 6 vs 12 hours placement respectively. Cesarean delivery rate was 52/119(43.7%) vs 64/120(53.3%) RR 0.82 95% CI 0.63-0.07 p=0.136 and maternal satisfaction score (0-10 numerical rating scale) was 7[6-9] vs 7[7-9] p=0.880 for 6 vs 12 hours respectively. Planned 6 vs 12 hours Foley balloon placement shortens time to birth despite less cervical ripening at Foley removal and more additional cervical ripening agent use. However, 6 hours placement was less likely to be recommended to a friend.

A Fourth-Degree Domestic Accident-Induced Perineal Tear in A Two Days-Old Female Newborn

We report a case of a fourth-degree perineal tear triggered by a brick’s fall in two-days-old female newborn. We successfully managed the injury by means of a surgical repair and an antibiotic coverage.

Six vs 12 hours of Foley catheter balloon placement in the labor induction of multiparas with unfavorable cervixes: a randomized controlled trial

Planned 6- vs 12-hour placement of the double-balloon catheter for cervical ripening in labor induction hastens delivery. The Foley catheter is low-priced and typically performs at least as well as the proprietary double-balloon devices in labor induction. Maternal satisfaction with labor induction is usually inversely related to the speed of the process. This study aimed to compare Foley balloon placement for 6 vs 12 hours in the labor induction of multiparas with unfavorable cervixes. A randomized controlled trial was conducted in a university hospital in Malaysia from January to October of 2022. Eligible multiparous women admitted for induction of labor for various indications were enrolled. Participant inclusion criteria were multiparity (at least 1 previous vaginal delivery of ≥24 weeks' gestation), age ≥18 years, term pregnancy >37 weeks' gestation, singleton pregnancy, cephalic presentation, intact membranes, normal fetal heart rate tracing, no significant contractions (< 2 in 10 minutes), and unfavorable cervix (Bishop score < 6). Participants were randomized after successful Foley balloon insertion for the balloon to be left in place for 6 or 12 hours of passive ripening before removal to check cervical suitability for amniotomy. The primary outcomes were the induction-to-delivery interval and maternal satisfaction with the allocated intervention assessed using a visual numerical rating scale (0-10). Secondary outcomes were derived in part from the core outcome set for trials on induction of labor (Core Outcomes in Women's and Newborn Health [CROWN]). Maternal outcomes were change in first Bishop score after intervention, use of additional method for cervical ripening, time to delivery after balloon removal, mode of delivery, indication for cesarean delivery, duration of oxytocin infusion, blood loss during delivery, presence of third- or fourth-degree perineal tear, maternal infection, use of regional analgesia in labor, length of hospital stay, intensive care unit (ICU) admission, cardiorespiratory arrest, and need for hysterectomy. The secondary neonatal outcomes were Apgar score at 1 and 5 minutes, neonatal intensive care unit (NICU) admission, cord blood pH, neonatal sepsis, birthweight, birth trauma, hypoxic-ischemic encephalopathy, or need for therapeutic hypothermia. Analyses were conducted with the t-test, Mann-Whitney U test, chi-square test, and Fisher exact test, as appropriate. A total of 220 women were randomized (110 to each intervention). Regarding the 2 primary outcomes, the induction-to-delivery intervals were a median (interquartile range) of 15.9 (12.0-24.0) and 21.6 (17.3-26.0) hours (P<.001), and maternal satisfaction scores were 7 (6-8) and 7 (6-8) (P=.734) for 6- and 12-hour placement, respectively. The following rates were observed for 6- and 12-hour placement, respectively: sequential use of additional cervical ripening agent (Foley reinsertion)-29 per 110 (26.4%) and 13 per 110 (11.8%) (relative risk, 2.23; 95% confidence interval, 1.23-4.10; P=.006); spontaneous balloon expulsion-22 per 110 (20.0%) and 37 per 110 (33.6%) (relative risk, 0.60; 95% confidence interval, 0.38-0.94; P=.022); and recommendation of the allocated intervention to a friend-61 per 110 (73.6%) and 87 per 110 (79.1%) (relative risk, 0.90; 95% confidence interval, 0.80-1.08; P=.341). Other secondary outcomes, including cesarean delivery, were not significantly different. Foley balloon placement for 6 hours for cervical ripening in parous women hastens birth but does not increase maternal satisfaction relative to 12-hour placement. Foley reinsertion for additional ripening was more frequent in the 6-hour group.

Obstetric anal sphincter injuries: are defunctioning colostomies required?

The incidence of obstetric anal sphincter injury in the UK is rising. This condition leads to significant morbidity in otherwise healthy women. Significant long-term complications of obstetric anal sphincter injury include anal incontinence, ano-vaginal or recto-vaginal fistula and psychological distress. Current management of third and fourth degree perineal tears post-vaginal birth is primary repair. This article discusses the role of a defunctioning colostomy in women with severe perineal tears in the immediate postnatal period. A defunctioning colostomy is a surgical procedure to open a section of colon (large bowel) onto the abdominal wall; a stoma bag is then worn over this to collect faeces. The rectum and anal canal are not used (defunctioned), while the stoma is in place and the perineum is healing. This article describes the purpose and operative steps of colostomy formation and reviews current published evidence of outcomes in those with colostomy formation for obstetric anal sphincter injury. It also addresses the difference in clinical approach between obstetricians and colorectal surgeons in relation to the management of severe obstetric anal sphincter injury and highlight the need for multidisciplinary input.

Safety and efficacy of the OdonAssist inflatable device for assisted vaginal birth: the BESANCON ASSIST study

The first feasibility study of the OdonAssist inflatable device for use in clinically indicated assisted vaginal birth reported a success rate of 48% with no significant safety concerns. Additional studies exploring the device performance in other clinical settings are warranted before definitive conclusions can be drawn about its safety and efficacy in current practice. This study aimed to investigate the safety and efficacy of the OdonAssist before conducting a randomized controlled trial. This was an open-label, nonrandomized study of 104 women with a clinically indicated assisted vaginal birth using the OdonAssist at the Besancon University Hospital, France. Data, including those of a nested cohort group of women who had an assisted vaginal birth using vacuum or spatulas because a trained OdonAssist device operator was not available at the time of delivery, were collected. The primary outcome measure was the proportion of successful assisted vaginal births using the OdonAssist. Neonatal outcome data were reviewed at days 1 and 28, and maternal outcomes were investigated up to day90. Between December 2019 and May 2021, 2191 pregnant women were approached, and 83% (1636/1973) of them consented to participate in the study. Among them, 10.7% (176/1636) required an assisted vaginal birth owing to a vertex presentation at+1 and below. The OdonAssist was used in 59% of births (104/176), and 41.1% (72/176) of the participants were included in the nested cohort group. The rate of successful assisted vaginal births using the OdonAssist was 88.5% (92/104). No emergency cesarean deliveries were performed in the OdonAssist group. There were no serious adverse maternal or neonatal reactions related to the use of the device. The rate of third- and fourth-degree perineal tears with the OdonAssist was 3.8% (4/104). The maternal perception ratings of the birth experience with the OdonAssist (collected on days 1, 7, and 28 using a 15-point scale) were high. In addition, the operators reported a positive perception of the device, with ease of use across the different steps of the procedure. One single technique was used for all vertex fetal head positions. The OdonAssist is a safe and effective alternative to other current devices for assisted vaginal births. The high acceptance rate (83%) among pregnant women and the high rate of successful assisted vaginal births using the OdonAssist confirm the feasibility of a future randomized controlled trial.

Comparison of Pregnancy Outcome between 4 and 6 cm Cervical os Dilatation to Demarcate Active Phase of Labour: A Cross-Sectional Study.

This is a cross-sectional study comparing pregnancy outcomes between participants with 4 and 6 cm of cervical os dilatation at the diagnosis of the active phase of labour. It was conducted in a single tertiary centre involving low-risk singleton pregnancies at or beyond 37 weeks with spontaneous onset of labour. A total of 155 participants were recruited, 101 in group 1 (4 cm) and 54 in group 2 (6 cm). Both groups were similar in mean maternal age, mean gestational age at delivery, ethnicity, median haemoglobin level at delivery, body mass index, and parity. There were significantly more participants in group 1 who needed oxytocin augmentation (p < 0.001) for the longer mean duration (p = 0.015), use of analgesia (p < 0.001), and caesarean section rate (p = 0.002). None of the women had a postpartum haemorrhage or a third- or fourth-degree perineal tear, and none of the neonates required admission to the neonatal intensive care unit. There were significantly more nulliparas who had a caesarean section as compared to multiparas. A cervical os dilatation of 6 cm reduces the risk of caesarean section by 11% (95% CI, 0.01-0.9) and increases three times more the need for analgesia (AOR = 3.44, 95% CI, 1.2-9.4). In conclusion, the demarcation of the active phase of labour at a cervical os dilatation of 6 cm is feasible without an increase in maternal or neonatal complications.

Is There Still a Place for Forceps Delivery in Modern Obstetrics?

Nowadays, we are witnessing a decrease of vaginal instrumental deliveries and continuous increase of caesarean section rate. However, proper identification of possibility of execution, indications for instrumental delivery and their skilful use may improve the broadly understood maternal and neonatal outcomes. The aim of this study is to present prevalence, risk factors, indications and outcomes of forceps deliveries among the patients at Department of Perinatology, Lodz. A retrospective study was conducted at the Department of Perinatology, Medical University of Lodz. The study included forceps deliveries carried out between January 2019 and December 2022. Total number of 147 cases were analysed in terms of indications for forceps delivery and maternal and neonatal outcomes such as vaginal - or cervical - laceration, postpartum haemorrhage, perineal tear, newborn injuries, Apgar score, umbilical cord blood gas analysis, NICU admission and cranial ultrasound scans. The prevalence of forceps delivery was 2.2%. The most common indication for forceps delivery was foetal distress (81.6%). Among mothers, the most frequent complication was vaginal laceration (40.1%). Third-and fourth-degree perineal tears were not noted. Regarding neonatal outcomes, Apgar score ≥ 8 after 1st and 5th minute of life received accordingly 91.2% and 98% of newborns. Only 8.8% experienced severe birth injuries (subperiosteal haematoma, clavicle fracture). Although foetal distress is the most common indication for forceps delivery, the vast majority of newborns were born in good condition and did not require admission to NICU. Taking into consideration high efficacy and low risk of neonatal and maternal complications, forceps should remain in modern obstetrics.

Risk factors accounting for anal incontinence during the first year after vaginal delivery-A case control study in China.

Anal incontinence (AI) is a prevalent postpartum disorder. This study aims to investigate and quantify the risk factors for AI in the Chinese population during the first year following vaginal delivery. The case control study was conducted at Peking University Third Hospital, including all women who delivered vaginally between January 1, 2014, and June 30, 2018. Participants were followed up by telephone interviews 1 year after delivery. AI was defined as the involuntary loss of flatus or feces using a retrospective Jorge and Wexner score above 0. Clinical data were retrieved from the medical record system. Univariate and multivariate analyses were applied to identify potential risk factors accounting for AI. Based on the logistic regression model, a nomogram was constructed to predict the probability of AI postpartum. Restricted cubic spline was utilized to explore potential non-linear relationships between birth weight and AI postpartum. Among the 140 AI and 421 none AI cases, we observed antepartum factors like every 100 g of birth weight gain (OR 1.39, 95% CI 1.30-1.49), while intrapartum factors like forceps-assisted vaginal delivery (OR 7.11, 95% CI 2.60-19.45), midline episiotomy (OR 13.11, 95% CI 1.71-100.89), second-degree perineal tear (OR 6.51, 95% CI 1.16-36.68), and third to fourth-degree perineal tear were independent risk factors for postpartum AI. Significantly, infant weighing over 3,400 g at birth increased the risk of AI postpartum. Based on logistic regression model, we constructed a nomogram to estimate the risk of AI 1 year after vaginal delivery. Our findings indicated that during the first year following vaginal delivery, infant with birth weight of 3,400 g or more, forceps-assisted vaginal delivery, midline episiotomy, and second to fourth-degree perineal tear increased the risk of AI. As a result, it is essential to limit the routine use of forceps and midline episiotomy and to monitor fetal weight during prenatal care.

Prolonged second stage labour and maternal-neonatal outcomes in northern Ethiopia: a retrospective cohort study

Background/Aims Prolonged second stage labour is thought to be a risk factor for obstetric and perinatal complications. However, its effect on complications has been found to be inconclusive by a broad range of studies. This study aimed to investigate the relationship between adverse maternal and neonatal outcomes and prolonged second stage of labour in northern Ethiopia. Methods This retrospective cohort study included 1055 systematically selected records of women who gave birth between 1 September 2014 and 30 August 2017. Binary and multivariable logistic regression models were used to test the effect of prolonged second stage labour on maternal and neonatal outcomes. Results Adverse outcomes significantly associated with prolonged second stage labour were: operative vaginal birth (P&lt;0.010), caesarean birth (P&lt;0.010), puerperal sepsis (P=0.010) and third- or fourth-degree perineal tears (P=0.028), episiotomy (P=0.003), a 5-minute Apgar score &lt;7 (P=0.030) and meconium-stained amniotic fluid (P&lt;0.010). Conclusions Multiple adverse outcomes were significantly associated with prolonged second stage labour. Therefore, close monitoring, follow up and timely interventions are needed for women experiencing prolonged second stage labour.

Anthropometric Features and Third-Fourth Degree Perineal Tears

The main objective of this study was to evaluate the association between maternal and fetal anthropometric characteristics and third- and fourth-degree perineal tears. This retrospective cohort study considered all consecutive pregnancies from 2011 to 2017 at a single Institution. The inclusion criteria were: singletons who delivered vaginally during the study period, the presence of information on maternal pre-pregnancy weight, maternal height, and weight of the newborn. The feto-maternal body-mass index (BMI) was calculated as neonatal weight in kg on maternal height in squared meters (kg/m2). In total, 5397 singleton-term pregnancies were included; the prevalence of third-fourth-degree perineal tears was 0.47%. The most predictive factors were: nulliparity, feto-maternal BMI, neonatal weight, gestational age at delivery, and neonatal head circumference. After adjustment in multivariate analysis, the only independent predictors were nulliparity and fetomaternal BMI. The AUC of the final multivariate model was 73.54% (95% CI 65.65-81.42). Furthermore, feto-maternal BMI and gestational age had a significant direct correlation. Nulliparity and feto-maternal BMI are the two best predictors for third and fourth-degree perineal tears in our setting. Confirming this association in future research and integrating it into a decision algorithm on delivery timing could reduce obstetric damage to the anal sphincter.

Vacuum-assisted delivery outcomes: is advanced maternal age a factor?

This study evaluated age-related maternal outcomes of vacuum-assisted vaginal deliveries (VAD). This retrospective cohort study included all nulliparous women with singleton VAD in one academic institution. Study group parturients were maternal age ≥ 35years and controls < 35. Power analysis revealed that 225 women/group would be sufficient to detect a difference in the rate of third- and fourth-degree perineal tears (primary maternal outcome) and umbilical cord pH < 7.15 (primary neonatal outcome). Secondary outcomes were maternal blood loss, Apgar scores, cup detachment, and subgaleal hematoma. Outcomes were compared between groups. From 2014 to 2019, 13,967 nulliparas delivered at our institution. Overall, 8810 (63.1%) underwent normal vaginal delivery, 2432 (17.4%) instrumental, and 2725 (19.5%) cesarean. Among 11,242 vaginal deliveries, 10,116 (90%) involved women < 35, including 2067 (20.5%) successful VAD vs. 1126 (10%) women ≥ 35years with 348 (30.9%) successful VAD (p < 0.001). Rates of third- and fourth-degree perineal lacerations were 6 (1.7%) with advanced maternal age and 57 (2.8%) among controls (p = 0.259). Cord pH < 7.15 was similar: 23 (6.6%) study group and 156 (7.5%) controls (p = 0.739). Advanced maternal age and VAD are not associated with higher risk for adverse outcomes. Older, nulliparous women are more likely to undergo vacuum delivery than younger parturients.

A 10-Year Review of Obstetrics Anal Sphincter Injury at a Tertiary Teaching Hospital in the East Coast of Peninsular Malaysia

Introduction: Obstetric anal sphincter injury (OASIS) is an uncommon complication that may occur during vaginal delivery and increases the risk of pelvic floor dysfunction following delivery. This 10-year review is aimed to determine the occurrence of OASIS at a tertiary teaching hospital. Methods: A retrospective review of records of women who had their newborns delivered at Hospital Universiti Sains Malaysia between 2007-2016 was conducted. OASIS was classified according to the classification proposed by Sultan AH in 1999. Women who delivered on the same day with the index delivery but without OASIS acted as the control group (n = 154). Results: There were 61,049 vaginal deliveries over the ten years. A total of 154 women were recorded to have vaginal delivery complicated with OASIS, with a cumulative prevalence of 0.25% per year. Of these, 86% (n = 133) sustained a third-degree, and the remaining 14% (n = 21) had a fourth-degree perineal tear. Three independent risk factors for OASIS were identified using multivariable analysis: primiparity, greater gestational age, and higher infant birth weight. Conclusion: Nulliparous, primiparous, and a higher infant birth weight &gt; 3500 g pose a higher possibility of developing OASIS during vaginal delivery among women who delivered at a tertiary teaching hospital on the east coast of Malaysia.