Misoprostol use during the third stage of labor

Randomized controlled trial comparing 400μg sublingual misoprostol versus placebo for prevention of primary postpartum hemorrhage

INTRODUCTION

obstetric hemorrhage is estimated to cause 25% of all maternal deaths and is the leading direct cause of maternal mortality worldwide. The World Health Organization recommended the use of uterotonics that should be offered for all women who will give birth but in some countries or in special situations oxytocin is not available. The goal of this study is to determine whether the 400μg dose of Misoprostol decreases the incidence of postpartum hemorrhage (PPH) of women who did not show signs of hemorrhage.

METHODS

a prospective randomized double blind controlled trial was conducted between February 2012 and June 2012, among women in the active stage of labor attending the Obstetric Gynecology Department, University Hospital Farhat Hached of Sousse, Tunisia. Women with term singleton pregnancies greater than 32 weeks of amenorrhea with anticipated vaginal delivery were eligible for the study. Participants were randomly assigned to receive 400 μg sublingual Misoprostol or 2 ets of placebo immediately after cord clamping. The primary outcome measures were an estimation of blood loss including the subjective finding of vaginal hemorrhage > 500 ml, the decrease of hemoglobin and hematocrit, a change in hemodynamic parameters, and the need for additional dose of oxytocin. Secondary outcomes were occurrence of possible side effects such as: headache, nausea, vomiting, pyrexia, diarrhea and abdominal pain.

RESULTS

a total of 211 patients were randomized: 111 in the Misoprostol group (Cytotec*) and 100 patients in the placebo group. The two groups were similar in terms of sociodemographic characteristics. Significant difference between the 400-μg of Misoprostol and placebo group were recorded in mean postpartum blood and PPH occurrence. The difference in pre- and postpartum hemoglobin loss (expressed in grams per 100 ml) was 1.21 ± 1.05 for the Misoprostol group and 1.51 ± 0.74 for the placebo group with significant difference (p = 0.02). No differences were observed in the occurrence of headache, dizziness, vomiting, diarrhea and metallic taste but the incidence of shivering was more than twice as great among women receiving Misoprostol than among those treated with placebo with a significant difference (p = 0.01). Similarly, women who received Misoprostol had a significantly higher mean temperature after delivery in comparison with those receiving placebo.

CONCLUSION

misoprostol, administered as 400 μg after delivery, appears to be effective for the prevention of post-partum hemorrhage, but its side effects appears to be significant.

Prophylactic management of postpartum haemorrhage in the third stage of labour: an overview of systematic reviews

BACKGROUND

Postpartum haemorrhage is a direct cause of maternal death worldwide and usually occurs during the third stage of labour. Most women receive some type of prophylactic management, which may include pharmacological or non-pharmacological interventions. The objective of this study was to summarize systematic reviews that assessed the effects of postpartum haemorrhage prophylactic management during the third stage of labour.

METHODS

We applied the guidelines for conducting an overview of reviews from the Cochrane Handbook for Systematic Reviews of Interventions. We searched MEDLINE, EMBASE, and the Cochrane Database of Systematic Reviews to identify all relevant systematic reviews of randomized controlled trials of prophylactic management of postpartum haemorrhage in the third stage of labour compared with no treatment, placebo, or another management technique. Two review authors independently extracted data and assessed methodological quality using a measurement tool to assess reviews and quality of evidence using the Grades of Recommendation, Assessment, Development, and Evaluation for primary outcomes, summarizing results narratively.

RESULTS

We identified 29 systematic reviews: 18 Cochrane and 11 non-Cochrane. Cochrane systematic reviews were high quality, while the quality of non-Cochrane systematic reviews varied. The following techniques suggested effective, third-stage interventions to reduce the incidence of severe postpartum haemorrhage: active management of the third stage of labour compared to physiological management, active management compared to expectant management, administration of oxytocin compared to placebo, and use of tranexamic acid compared to placebo. The following third-stage management approaches reduced the need for blood transfusion: active management compared to physiological management, active management compared to expectant management, oral misoprostol compared to placebo, and tranexamic acid compared to placebo.

CONCLUSIONS

No effective prophylactic management techniques were identified for maternal mortality. Most methods of effective prophylactic management of postpartum haemorrhage were supported by evidence; however, they were limited to low- or moderate-quality evidence, and high-quality studies are therefore needed. Outcome measures of the included systematic reviews varied. It is recommended that outcome measures in preventive postpartum haemorrhage intervention trials align with the World Health Organization guidelines.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO: CRD42016049220 .

Misoprostol-Induced Modification of the Notch Signaling Pathway in the Human Cervix

The complex and multifactorial mechanisms that initiate and sustain the early labor process in the human uterus and cervix are still not well defined. Cervical maturation or ripening is likely to play a key role in preparing for birth. Prostaglandins have many different functions, including the regulation of uterine contractility and structure during pregnancy. The prostaglandin E1 analogue misoprostol is frequently used as a uterotonic and cervical ripening agent. Notch is a transmembrane receptor family responsible for basic functions such as cell survival, cell-cell communication, and differentiation and decidualization in pregnancy. However, our understanding of the effect of Notch signaling on the cervical ripening process is limited. This study was conducted in 20 pregnant women aged at 12 to 20 weeks of gestation undergoing medical abortion for fetal or maternal indications. True-Cut needle biopsies were taken from the anterior cervix 4 hours after oral ingestion of 200-μg misoprostol or before the ingestion of misoprostol in the control group. Cervical expression of Notch receptors and ligands changed during the early phase of prostaglandin-induced preterm labor. Four hours after the administration of misoprostol, it was seen that N1 expression increased in muscle, while DLL1 and J2 expression increased in blood vessels, and N4 expression increased in macrophages. Knowing the mechanisms that initiate preterm birth is the most important step in planning the treatments and actions to prevent premature birth. As a signal that affects and perhaps directs preterm labor, Notch is prone to be an important actor in this process.

The effect of prophylactic oral tranexamic acid plus buccal misoprostol on blood loss after vaginal delivery: a randomized controlled trial

OBJECTIVE

The objective of this study is to evaluate the effect of prophylactic oral tranexamic acid (TA) plus buccal misoprostol on the amount of blood loss after vaginal delivery in women at low risk for post-partum hemorrhage (PPH).

MATERIALS AND METHODS

The study was a randomized open label clinical trial conducted in a tertiary University Hospital between January 2016 and June 2017. We included women who delivered vaginally with a singleton pregnancy. They were randomized into three groups: group I (women received 10 IU oxytocin IV after delivery of the baby), group II (women received 600 µg buccal misoprostol after delivery of the baby), and group III (women received 1000 mg oral TA at the end of the first stage of labor plus 600 µg buccal misoprostol after delivery of the baby). In each group, pre- and post-delivery pulse rate, blood pressure, temperature, and hemoglobin level were evaluated. Additionally, the amount of blood loss, need for blood transfusion, need for additional uterotonics, and side effects of the study medications were recorded.

RESULTS

There was a statistically significant lower hemoglobin level and higher blood loss in the misoprostol group compared with oxytocin group and TA plus misoprostol group (p = .0001). There was a statistically significant higher hemoglobin level and lower blood loss in the TA plus misoprostol group compared with the oxytocin group (p = .004 and .043, respectively). PPH occurred in 16.7% of women in the misoprostol group compared 1.7% in the oxytocin group and no cases of PPH in the TA plus misoprostol group (p = .0001).

CONCLUSIONS

In settings like rural area or home delivery in which oxytocin is not available, alternative oral TA plus buccal misoprostol may be considered as an effective line in prevention of PPH.

Feasibility, acceptability, and programme effectiveness of misoprostol for prevention of postpartum haemorrhage in rural bangladesh: a quasiexperimental study

We explored the feasibility of distributing misoprostol tablets using two strategies in prevention of postpartum haemorrhage (PPH) among women residing in the Abhoynagar subdistrict of Bangladesh. We conducted a quasiexperimental study with a posttest design and nonequivalent comparison and intervention groups. Paramedics distributed three misoprostol tablets, one delivery mat (Quaiyum's delivery mat), a packet of five standardized sanitary pads, and one lidded plastic container with detailed counseling on their use. All materials except misoprostol were also provided with counseling sessions to the control group participants. Postpartum blood loss was measured by paramedics using standardized method. This study has demonstrated community acceptability to misoprostol tablets for the prevention of PPH that reduced overall volume of blood loss after childbirth. Likewise, the delivery mat and pad were found to be useful to mothers as tools for assessing the amount of blood loss after delivery and informing care-seeking decisions. Further studies should be undertaken to explore whether government outreach health workers can be trained to effectively distribute misoprostol tablets among rural women of Bangladesh. Such a study should explore and identify the programmatic requirements to integrate this within the existing reproductive health program of the Government of Bangladesh.

Assessment of sublingual misoprostol as first-line treatment for primary post-partum hemorrhage: results of a multicenter trial

AIM

The study investigated the effectiveness of sublingual misoprostol when used as primary treatment of primary post-partum hemorrhage (PPH) in a low-income country.

METHODS

Maternity care providers in three Nigerian hospitals administrated 800 μm sublingual misoprostol to women experiencing PPH. The outcome variables were estimated blood loss and the need for additional uterotonic drugs after initial treatment with misoprostol. Entry criteria included women in term spontaneous labor, while exclusion criteria were women with operative delivery and those experiencing PPH not due to atonic uterus.

RESULTS

One hundred and thirty-one women with PPH were treated over 6 months. Estimated blood loss ranged 500-2500 mL. Twenty women (15.3%) required additional uterotonic drugs to control continuing blood loss. There were no maternal deaths, while seven perinatal deaths were recorded.

CONCLUSION

We conclude that although sublingual misoprostol is effective in reducing blood loss due to PPH, it does not effectively treat all forms of PPH. Additional uterotonics and other ancillary treatments would be required.

CEU: Prevention and Treatment of Postpartum Hemorrhage: New Advances for Low-Resource Settings

Postpartum hemorrhage due to uterine atony is the primary direct cause of maternal mortality globally. Management strategies in developed countries involve crystalloid fluid replacement, blood transfusions, and surgery. These definitive therapies are often not accessible in developing countries. Long transports from home or primary health care facilities, a dearth of skilled providers, and lack of intravenous fluids and/or a safe blood supply often create long delays in instituting appropriate treatment. We review the evidence for active management of third-stage labor and for the use of specific uterotonics. New strategies to prevent and manage postpartum hemorrhage in developing countries, such as community-based use of misoprostol, oxytocin in the Uniject delivery system, the non-inflatable antishock garment to stabilize and resuscitate hypovolemic shock, and the balloon condom catheter to treat intractable uterine bleeding are reviewed. New directions for clinical and operations research are suggested.

Rectal Misoprostol Versus Oxytocin in the Management of the Third Stage of Labour

OBJECTIVE

To compare the effect of rectal misoprostol with intramuscular oxytocin in the routine management of the third stage in a rural developing country.

METHODS

A randomized controlled trial was performed at two district hospitals in Ghana, West Africa. Four hundred fifty women in advanced labour were enrolled. The only exclusion criterion was a known medical contraindication to prostaglandin administration. Women were randomized to receive rectal misoprostol 800 microg or intramuscular oxytocin 10 IU with delivery of the anterior shoulder. The main outcome measure was change in hemoglobin concentration from before to after delivery. Secondary outcomes included the need for additional uterotonics, estimated blood loss, transfusion, and medication side effects.

RESULTS

Demographic characteristics were similar in each treatment group. There was no significant difference between treatment groups in change in hemoglobin (misoprostol 1.19 g/dL and oxytocin 1.16 g/dL; relative difference 2.6%; 95% confidence intervals [CI]-16.8% to 19.4%; P = 0.80). The only significant secondary outcome was shivering, which was more common in the misoprostol group (misoprostol 7.5% vs. oxytocin 0.9%; relative risk 8.0; 95% CI 1.86-34.36; P = 0.001).

CONCLUSION

Rectal misoprostol 800 microg is as effective as 10 IU intramuscular oxytocin in minimizing blood loss in the third stage of labour. Rectal misoprostol has a lower incidence of side effects than the equivalent oral dose. This confirms the utility of misoprostol as a safe and effective uterotonic for use in the rural and remote areas of developing nations where other pharmacologic agents may be less feasible.

Oral misoprostol vs. intravenous oxytocin in reducing blood loss after emergency cesarean delivery

OBJECTIVE

To compare the effectiveness of oral misoprostol and intravenous oxytocin in reducing blood loss in women undergoing indicated or elective cesarean delivery (CD) under spinal anesthesia.

METHODS

In this prospective, double-blind pilot study, 56 parturients who received 5 IU of intravenous oxytocin after cord clamping were randomized to further receive either misoprostol orally and a placebo infusion intravenously or placebo orally and an oxytocin infusion intravenously.

RESULTS

After adjustment was made for the sonographically estimated amniotic fluid volume, there was no statistical difference in blood loss between the 2 groups (mean+/-S.D., 1083+/-920 mL in the oxytocin group vs. 970+/-560 mL in the misoprostol group; P=.59).

CONCLUSION

Oxytocin followed by oral misoprostol is as effective as an oxytocin injection followed by an oxytocin infusion in reducing postoperative blood loss after CD, and the protocol may be a safe, valuable, and cost-effective alternative to oxytocin alone. Visual estimation of intraoperative blood loss undervalues the effective value of misoprostol use by 30%.

Misoprostol in preventing postpartum hemorrhage: A meta-analysis

OBJECTIVE

To assess misoprostol's ability to prevent postpartum hemorrhage (PPH) where no alternatives exist. Comparison to oxytocics demonstrates how similarly misoprostol achieves a level of effectiveness-obtainable only in hospitals-in remote locations around the world.

METHOD

Using the Mantel-Haenszel fixed-effects model and the DerSirmonian and Laird random-effects model, summary statistics indicated that misoprostol's excess risk of PPH was only 4% when compared to oxytocics.

RESULT

This risk difference was well within the range of expected results for all uterotonic agents and does not warrant branding misoprostol as an inferior drug.

CONCLUSION

Conventional uterotonic drugs should not be used to set the lowest-accepted level of effectiveness in settings where they are entirely unsuitable. Continuing to weigh the benefits of one effective drug against another only delays the distribution of misoprostol in countries where it is the only feasible choice and must be measured against no treatment at all.

Oral misoprostol in the third stage of labor

OBJECTIVE

To compare the efficacy of intravenous ergometrine, intramuscular oxytocin, and oral misoprostol in the control of postpartum hemorrhage.

METHODS

Mean blood loss, rates of blood loss between 500 and 1000 ml, hematocrit fall greater than 10%, and need for additional oxytocic agents and nature and rates of adverse effects were assessed in this prospective, randomized, controlled study.

RESULTS

All outcomes were similar in the 3 groups. The main adverse effects in the misoprostol group were temperatures higher than 99 degrees F, which normalized within 2 h and shivering, which was mild and self-limiting.

CONCLUSIONS

Oral misoprostol is as effective as conventional oxytocic agents in preventing postpartum hemorrhage and can be recommended for use in low-resource settings.

Examining the evidence for The International Confederation of Midwives’ essential competencies for midwifery practice

OBJECTIVE

to present the evidence for inclusion of selected midwifery tasks (skills) as essential practice competencies for midwives throughout the world. The tasks addressed are those presented to the International Confederation of Midwives (ICM) Council of Delegates in 2002 for discussion and adoption, based on the fact that during field-testing, notable variance was encountered.

KEY CONCLUSIONS AND IMPLICATIONS FOR PRACTICE

evidence-based practice should be characterised by the use of best practices derived from rigorous research, combined with and balanced by client perspectives and the expert judgement based on the critical thinking of the clinician. Much of midwifery practice is considered an art based on common sense, tradition, and woman-centred approaches to caring, as most of the women who seek midwifery care are healthy and require a health-promotion model of care that may not easily lend itself to examination by scientists or clinicians. However, when intervention is indicated to save the lives of mother, baby, or both, those interventions must be based on the best available evidence from a variety of sources leading to the most effective choices for action. The ICM Essential Competencies for Midwifery Practice (2002) are based on evidence derived from a variety of quantitative and qualitative methodologies. Expert clinical consensus may serve as to the best form of evidence at certain points in the evolution of knowledge. Every midwife needs to understand where the gaps exist in supporting traditional practices that have yet to be fully examined in a scientific manner. In summary, a multi-matrix or triangulated approach may be most appropriate to the delineation of evidence underpinning best midwifery practice.

Misoprostol and pregnancy: ever-increasing indications of effective usage

PURPOSE OF REVIEW

The subject of misoprostol in the field of reproductive health care has courted much controversy. The aim of this review is to survey the literature published in this field over the past year, and to evaluate developments in this area. This article will cover termination of pregnancy, induction of labor and the issue of postpartum hemorrhage.

RECENT FINDINGS

The use of misoprostol as a single agent remains of clinical value when mifepristone is unavailable. The sublingual and rectal routes are alternative modes of administration. For induction of labor, the optimum dose and route of misoprostol is still undetermined. Lower doses of between 20 microg to 40 microg may increase the safety profile for labor induction. Misoprostol may be a useful adjunct to the therapeutic options available for the prevention and treatment of postpartum hemorrhage.

SUMMARY

There are many potential uses for misoprostol in pregnancy. However clinicians must judge the evidence and the emotive debate surrounding this field and decide how it will influence their clinical practice depending on the priorities of their own clinical circumstances.

Current strategies for the prevention of postpartum haemorrhage in the third stage of labour

PURPOSE OF REVIEW

Despite evidence that active management of the third stage of labour reduces the incidence of postpartum haemorrhage, expectant management is still widely practised. Factors accounting for this situation include the desire for a more natural experience of childbirth, the philosophy that active management is unnecessary in low-risk women, and avoidance of the adverse effects of conventional uterotonic agents. This review will evaluate the various strategies currently used for the prevention of primary postpartum haemorrhage.

RECENT FINDINGS

Since publication of the first systematic review comparing active with expectant management in 1988, active management of the third stage using oxytocics has become increasingly adopted. Recent surveys, however, show that there are still wide variations in practice around the world. Recent interest has focused on the use of misoprostol for the prevention of postpartum haemorrhage. Carbetocin, an oxytocin receptor agonist, shows promise but has not been evaluated for use after vaginal births.

SUMMARY

Active management of the third stage of labour is superior to expectant management in terms of blood loss, postpartum haemorrhage and other serious complications, but is associated with unpleasant side effects and hypertension when ergometrine is included. Intramuscular oxytocin results in fewer side effects. Oral and rectal misoprostol has been extensively assessed and found to be less effective than conventional oxytocics with more side effects. Until alternative regimes of misoprostol are studied in large controlled trials, misoprostol is not recommended for routine use in the third stage of labour. Of the remaining uterotonic agents evaluated, intramuscular carbetocin appears the most promising.

Misoprostol: A Quarter Century of Use, Abuse, and Creative Misuse

Misoprostol is a prostaglandin E1 analog originally intended for use to prevent NSAID-induced gastric ulcers. However, because of its cervical ripening and uterotonic property, misoprostol has become one of the most useful drugs in obstetrics and gynecology. Misoprostol has proven to be a very convenient and flexible drug because of its formulation as a tablet that is stable and that can be administered orally, rectally, vaginally and by the sublingual route. Beginning with its abuse for illegal abortion in the late 1980s, misoprostol has quickly become established as one of the most effective drugs for terminating pregnancies in the first and second trimesters, as well as for inducing labor in the third trimester. Its use for routine prevention of postpartum hemorrhage has not been so successful, partly as the high doses required for this indication often result in troublesome side effects. Despite the large body of medical evidence about its efficacy and relative safety, the use of misoprostol in pregnant women remained off-label until the spring of 2002.