Effects of different techniques during the second stage of labour on reducing perineal laceration: An overview of systematic reviews

Perineal massage and warm compresses-Implementation study of a complex intervention in health

OBJECTIVES

To determine the effect of using tailored and multifaceted strategies on the acceptability, appropriateness, feasibility and adoption of a perineal massage and warm compress intervention by midwives in a maternity ward of a tertiary hospital in Portugal.

METHODS

The complex intervention in health was developed based on the Medical Research Council framework and guided by the Theory of Change. Tailored and multifaceted strategies, including dissemination, integration and implementing process strategies, were applied. A mixed-methods approach was adopted, with a combination of qualitative (semi-open interviews) and quantitative (surveys, audits and electronic health records) methods. Surveys were applied to assess the acceptability, appropriateness and feasibility of the intervention. In order to evaluate adoption of the intervention, data from interviews were introduced into NVivo Version 10 to perform thematic analysis, and each audit checklist criterion was analysed using McNemar's exact test to determine differences in paired proportion.

RESULTS

This study found high acceptability (mean±standard deviation 4.28±0.45), high appropriateness (4.32±0.47) and high feasibility (4.26±0.43) of the intervention by midwives. Differences were reported for most topics between interviews conducted before and after implementation of the intervention. Pre-intervention, the midwives reported that the main factor affecting the application of perineal protection techniques was the lack of continuous presence of the midwife. The birth position was the alternative birth position (hands and knees, side-lying, squatting and semi-sitting), avoiding the lithotomy position. Techniques used for perineal protection were warm compresses, hands-on techniques, hands-off techniques and spontaneous pushing; and the reasons given for performing an episiotomy were large (high-birthweight) baby, Kristeller manoeuvre, tense perineum and previous obstetric sphincter injury. Post-intervention, the midwives reported that the presence of a second person increases the safety of professionals and women and improves working relations. The technique used for perineal protection was autonomy to adapt the intervention with perineal massage and warm compresses. A comfortable birth position for woman was used, and the rate of episiotomy reduced (only performed in the case of fetal distress). Regarding audits, significant differences (p < 0.05) were found for all audit criteria (pre- and post-intervention), which means that midwives adopted the intervention into their clinical practice.

CONCLUSION

Acceptability, appropriateness, feasibility and adoption of the intervention by midwives were high. Thus, tailored and multifaceted strategies were effective to achieve the implementation outcomes.

Severe perineal lacerations in induction of labor versus expectant management: A systematic review and meta-analysis of randomized controlled trials

OBJECTIVE

This study aimed to evaluate if induction of labor (IOL) is associated with an increased risk of severe perineal laceration.

DATA SOURCES

A systematic search was conducted in MEDLINE, Ovid, Scopus, ClinicalTrials.gov, Cochrane Central Register of Controlled Trials, and CINHAL using a combination of keywords and text words related to "induction of labor," "severe perineal laceration," "third-degree laceration," "fourth-degree laceration," and "OASIS" from inception of each database until January 2023.

STUDY ELIGIBILITY CRITERIA

We included all randomized controlled trials (RCTs) comparing IOL to expectant management of a singleton, cephalic pregnancy at term gestation that reported rates of severe perineal laceration.

STUDY APPRAISAL AND SYNTHESIS AND METHODS

The primary outcome of interest was severe perineal laceration, defined as 3rd- or 4th-degree perineal lacerations. We conducted meta-analyses using the random effects model of DerSimonian and Laird to determine the relative risks (RR) or mean differences with 95% confidence intervals (CIs). Bias was assessed using guidelines established by Cochrane Handbook for Systematic Reviews of Interventions.

RESULTS

A total of 11,187 unique records were screened and ultimately eight RCTs were included, involving 13,297 patients. There was no statistically significant difference in the incidence of severe perineal lacerations between the IOL and expectant management groups (209/6655 [3.1%] vs 202/6641 [3.0%]; RR 1.03, 95% CI 0.85, 1.26). There was a statistically significant decrease in the rate of cesarean birth (1090/6655 [16.4%] vs 1230/6641 [18.5%], RR 0.89, 95% CI 0.82, 0.95) and fetal macrosomia (734/2696 [27.2%] vs 964/2703 [35.7%]; RR 0.67: 95% CI 0.50, 0.90) in the IOL group.

CONCLUSION

There is no significant difference in the risk of severe perineal lacerations between IOL and expectant management in this meta-analysis of RCTs. Furthermore, there is a lower rate of cesarean births in the IOL group, indicating more successful vaginal deliveries with similar rates of severe perineal lacerations. Patients should be counseled that in addition to the known benefits of induction, there is no increased risk of severe perineal lacerations.

Maternal outcomes using delayed pushing versus immediate pushing in the second stage of labour: An umbrella review

INTRODUCTION

Different systematic reviews have been developed in the last decades about maternal risks of immediate pushing and delayed pushing, depending on the duration of the second stage of labour, but they do not provide conclusive evidence.

AIM

The main aim of this overview of systematic reviews was to assess the maternal outcomes using delayed pushing and immediate pushing in the second stage of labour in women receiving epidural analgesia.

METHODS

We searched systematically in PubMed (Medline), EMBASE, CINAHL, and Scopus (October 26th, 2023). Methodological quality was analysed using AMSTAR and ROBIS scales, and the strength of evidence was established according to the guidelines advisory committee grading criteria. The outcome measures were the duration of the second stage of labour, duration of active pushing, caesarean section, instrumental vaginal birth, spontaneous vaginal birth, fatigue score, perineal lacerations, postpartum haemorrhage, and rate of episiotomy. Seven systematic reviews with and without meta-analysis were included.

RESULTS

Results showed that delayed pushing increases the total time of the second stage of labour, although delayed pushing decreases the duration of active pushing with moderate quality of evidence. Mixed results were found with respect to the variables instrumental vaginal birth, spontaneous vaginal birth, and fatigue score although the results favour delayed pushing or show no statistically significant differences with respect to immediate pushing. No favourable results were ever found for immediate pushing with respect to delayed pushing, with a limited quality of evidence. Even so, delayed pushing seems to be associated with a significant increase in spontaneous vaginal birth rates. The results found no significant differences between the immediate pushing and delayed pushing groups in the caesarean section rates, perineal lacerations, postpartum haemorrhage, and episiotomy ratio, with a limited quality of evidence.

CONCLUSIONS

This study shows that delayed pushing during the second stage of labour produces at least the same maternal outcomes as immediate pushing, although we note that delayed pushing produces an increase of the duration of the second stage of labour, a shorter duration of the active pushing and a tendency to increase spontaneous vaginal birth and to reduce the instrumental vaginal birth rates and fatigue scores. This should be considered clinically. This review was registered in the International Prospective Register of Systematic Reviews PROSPERO (CRD42023397616).

The effects of warm perineal compress on perineal trauma and postpartum pain: a systematic review with meta-analysis and trial sequential analysis

BACKGROUND

In order to reduce the complications of perineal damage and the pain caused by it for the mother, this study was conducted to determine the effect of warm perineal compress on perineal trauma (1st-, 2nd-, 3rd-, and 4th-degree perineal tears), postpartum pain, intact perineum (primary outcomes), episiotomy, length of the second stage, and APGAR score at 1 and 5 min after childbirth (secondary outcome).

METHODS

PubMed, Scopus, Cochrane Central Register of Controlled Trials, Google Scholar, Web of Science, SID, Magiran, and ClinicalTrials.gov were searched to identify the relevant articles from inception to November 1, 2022, with language restriction (only English and Persian). A manual search was also performed. Risk of bias 2 (RoB2) and ROBIN-I were employed to evaluate the quality of the included papers. Meta-analysis was conducted using RevMan 5.3. Heterogeneity was assessed using I2. In cases with high heterogeneity, subgroup analysis was utilized based on the parity and ethnicity, and time of pain measurement after delivery also a random-effects model was used instead of a fixed-effects model. Trial sequential analysis (TSA) was performed for the primary outcomes. The certainty of evidence was assessed using the GRADE approach.

RESULTS

A total number of 228 articles were found in databases. Of these articles, eighty-six were screened by title, 27 by abstract, and 21 by full text. Finally, 14 articles were included, of which ten were RCT and four were non-RCT. Meta-analysis results revealed that warm perineal compress significantly reduced perineal pain (RR 0.23, 95% CI 0.08-0.66; P = 0.0006), average pain (SMD - 0.73, 95% CI 1.23 to - 0.23; P = 0.004), second-degree perineal tear (RR 0.65, 95% CI 0.54-0.79; P˂0.00001), third-degree perineal tear (RR 0.32, 95% CI 0.15-0.67; P = 0.003), fourth-degree perineal tear (RR 0.11, 95% CI 0.01-0.87; P = 0.04), episiotomy (RR 0.63, 95% CI 0.46-0.86; P = 0.004), and intact perineum significantly increased (RR 3.06, 95% CI 1.79-5.22; P < 0.0001) compared to the control group. However, there was no statistically significant difference in terms of first-degree tear (RR 1.04, 95% CI 0.86-1.25; P = 0.72), length of the second stage of labor (MD - 0.60, 95% CI - 2.43 to 1.22; P = 0.52), the first minute (MD - 0.03, 95% CI - 0.07 to 0.02; P = 0.24) and the fifth minute Apgar score (MD - 0.02, 95% CI - 0.07 to 0.03; P = 0.46) between the two groups.

CONCLUSION

Warm perineal compress administered during the second stage of labor reduce postpartum pain, second and third-degree perineal tears, and episiotomy rate while it increases the incidence of intact perineum compared to the control group.

Practice Programme for Upright Positions in the Second Stage of Labour: the development of a complex intervention based on the Medical Research Council Framework

AIMS

This study aimed to develop a Practice Programme for Upright Positions in the Second Stage of Labour to provide a reference for midwifery professionals in the standardized implementation of upright positions in clinical practice.

BACKGROUND

The adoption of upright positions in the second stage of labour is recommended by many international organizations, but upright positions have not been widely used and their implementation varies greatly across studies.

METHODS

The Practice Programme for Upright Positions in the Second Stage of Labour was developed under the guidance of the Medical Research Council framework for developing and evaluating complex interventions and the World Health Organization handbook for guideline development. Four stages were conducted: (1) establishing the intervention development group; (2) identifying a theoretical basis and forming a content framework; (3) evidence retrieval and synthesis; (4) refining and modelling the practice programme.

RESULTS

The content framework of the Practice Programme for Upright Positions in the Second Stage of Labour was formed based on the literature review, semi- structured interviews and expert consultation, including indications and contraindications, implementation methods, observations, potential risks and precautions. According to each item, we conducted a series of systematic reviews, and summarized the available best evidence from clinical guidelines, systematic reviews and original studies. Eventually, the Practice Programme for Upright Positions in the Second Stage of Labour was developed, integrating the findings of the iterative evidence reviews and revised by stakeholders.

CONCLUSIONS

This study firstly reported the development process of the Practice Programme for Upright Positions in the Second Stage of Labour, characterized by evidence-based, iteratively-processed, and highly-rigorous. The implications may guide researchers to embed the intervention normatively into clinical practice for improving maternal and infant outcomes.

IMPLICATIONS FOR NURSING MANAGEMENT

Facilitate systematic labour position management, and guide midwives in the successful implementation of upright positions.