Infection and extramural delivery with use of digoxin as a feticidal agent

Society of Family Planning Clinical Recommendation: Induction of fetal asystole before abortion Jointly developed with the Society for Maternal-Fetal Medicine

This document serves as a revision to the Society of Family Planning's 2010 guidelines, integrating literature on new techniques and research and addressing the clinical, medical, and sociolegal questions surrounding the induction of fetal asystole. Insufficient evidence exists to recommend routine induction of fetal asystole before previable medication and procedural abortion. However, at periviable gestations and after fetal viability, inducing fetal asystole before abortion prevents the infrequent but serious occurrence of unanticipated expulsion of a fetus with cardiorespiratory activity (Best Practice). Defining viability is complicated as it represents a physiological continuum impacted by gestational duration along with multiple other individual clinical factors and circumstances; therefore, the exact gestational duration to offer fetal asystole will depend on the setting and clinical circumstances. If induction of fetal asystole before abortion is available, we recommend engaging in patient-centered counseling regarding the risks and benefits of induction of fetal asystole in the setting of each unique pregnancy scenario and the patient's beliefs and priorities (Best Practice). We recommend that clinicians identify the optimal pharmacologic agent to administer for a given clinical scenario based on factors such as availability of each agent; the time frame in which fetal asystole needs to be established; and clinicians' technical ability, preferences, and practice (Best Practice). Potassium chloride, lidocaine, and digoxin are all acceptable pharmaceutical agents to induce fetal asystole before abortion. To establish asystole rapidly, we suggest the use of potassium chloride (via intracardiac or intrafunic injection) or lidocaine (via intracardiac or intrafunic injection) (GRADE 2C), although intrathoracic administration of lidocaine may be acceptable. We recommend potassium chloride not be used if intracardiac or intrafunic location cannot be achieved to avoid the risk of accidental administration to the pregnant individual and because insufficient data support its efficacy via other intrafetal locations (GRADE 1C). When using digoxin, we recommend intrafetal administration (GRADE 1C), although intraamniotic administration may be acceptable depending on a clinician's technical ability and setting. Because digoxin may take several hours to induce asystole, an alternative agent should be considered in settings where fetal asystole must be confirmed rapidly.

Society of Family Planning Clinical Recommendation: Induction of fetal asystole before abortion Jointly developed with the Society for Maternal-Fetal Medicine☆,☆☆

This document serves as a revision to the Society of Family Planning's 2010 guidelines, integrating literature on new techniques and research and addressing the clinical, medical, and sociolegal questions surrounding the induction of fetal asystole. Insufficient evidence exists to recommend routine induction of fetal asystole before previable medication and procedural abortion. However, at periviable gestations and after fetal viability, inducing fetal asystole before abortion prevents the infrequent but serious occurrence of unanticipated expulsion of a fetus with cardiorespiratory activity (Best Practice). Defining viability is complicated as it represents a physiological continuum impacted by gestational duration along with multiple other individual clinical factors and circumstances; therefore, the exact gestational duration to offer fetal asystole will depend on the setting and clinical circumstances. If induction of fetal asystole before abortion is available, we recommend engaging in patient-centered counseling regarding the risks and benefits of induction of fetal asystole in the setting of each unique pregnancy scenario and the patient's beliefs and priorities (Best Practice). We recommend that clinicians identify the optimal pharmacologic agent to administer for a given clinical scenario based on factors such as availability of each agent; the time frame in which fetal asystole needs to be established; and clinicians' technical ability, preferences, and practice (Best Practice). Potassium chloride, lidocaine, and digoxin are all acceptable pharmaceutical agents to induce fetal asystole before abortion. To establish asystole rapidly, we suggest the use of potassium chloride (via intracardiac or intrafunic injection) or lidocaine (via intracardiac or intrafunic injection) (GRADE 2C), although intrathoracic administration of lidocaine may be acceptable. We recommend potassium chloride not be used if intracardiac or intrafunic location cannot be achieved to avoid the risk of accidental administration to the pregnant individual and because insufficient data support its efficacy via other intrafetal locations (GRADE 1C). When using digoxin, we recommend intrafetal administration (GRADE 1C), although intraamniotic administration may be acceptable depending on a clinician's technical ability and setting. Because digoxin may take several hours to induce asystole, an alternative agent should be considered in settings where fetal asystole must be confirmed rapidly.

Drugs used to induce fetal demise prior to abortion: a systematic review

Clinicians have used feticidal agents prior to second trimester abortion for many years. Despite the widespread use of various agents to induce fetal demise, a comprehensive or systematic review of the evidence is lacking on the safety, effectiveness, and most effective routes of administration.

Objectives

To evaluate the existing drugs and routes of administration used in inducing fetal demise prior to abortion, and to determine the safety, effectiveness, and acceptability of these feticidal agents.

Methods

We searched PubMed, EMBASE, CINAHL, POPLINE, and Global Index Medicus to identify studies describing pharmacologic agents used to induce fetal demise prior to termination of pregnancy. We included randomized controlled trials and observational studies comparing digoxin, potassium chloride (KCL), and lidocaine to induce fetal demise. We included studies that evaluated the primary outcomes of safety and effectiveness, including success in achieving fetal demise, induction to expulsion time for medical abortion, dilation and evacuation time, as well as maternal side effects and complications. Two authors independently screened abstracts and full texts. One reviewer extracted data from the included studies, which was counterchecked by a second reviewer.

Results

We identified eight studies that met inclusion criteria: three randomized controlled trials, and five observational studies. A total of 4505 women received drugs to induce fetal demise at 17 to 38 weeks' gestation, including digoxin (n = 4174), KCL (n = 324), and lidocaine (n = 7). Intra-fetal digoxin was superior to intra-amniotic digoxin in achieving fetal demise (OR 3.51, 95% CI 1.60, 7.78). Intracardiac KCL 15% 2–3 mL reduced induction to expulsion time by 320 min (p <.006).

Similarly, intracardiac KCL 15% 1–3 ml reduced dilation and evacuation time from 16.1 ± 7.9 min to 12.7 ± 5 min (p < 0.001). Intracardiac lidocaine 2% 10 mL was more effective at achieving fetal demise than intracardiac KCL 6 mmol (85.7% vs. 57.9%). Intra-amniotic and intra-fetal digoxin 1 mg, as compared to no feticidal agent, led to greater pre-procedure expulsion, hospital readmission, and the presence of one or more signs of infection.

Conclusions

Evidence from included cohort studies demonstrates that digoxin, KCL, and lidocaine are all effective in inducing fetal demise. Intra-fetal administration of digoxin is superior to intra-amniotic digoxin administration. Administration of feticide using intracardiac KCL may shorten the abortion experience. Limited data from observational studies also supports an increase in maternal side effects and/or complications related to the administration of digoxin.

Implications

Intra-fetal administration of digoxin is more effective in achieving fetal demise when compared to intra-amniotic administration. There is a knowledge gap in determining the single best drug for inducing fetal demise prior to abortion. Additional research is needed to compare different feticidal agents in terms of safety and effectiveness.

Feasibility of intra-amniotic digoxin administration by obstetrics and gynecology trainees to induce fetal demise prior to medical abortion beyond 20 weeks

BACKGROUND

Transient fetal survival is one issue that providers may face while managing late second-trimester abortion. Induction of fetal demise using digoxin and other means has been widely performed by maternal-fetal medicine and family planning subspecialists worldwide. However, there are no data available in Ethiopia as regards preventing transient fetal survival in late second-trimester medical termination of pregnancy.

OBJECTIVE

The objective of the study was to document the feasibility of intra-amniotic digoxin administration for inducing fetal demise prior to medical abortion beyond 20 weeks of gestational age. Additionally, we aimed to demonstrate that this skill could be transferred to obstetrics and gynaecology residents at St Paul's Hospital Millennium Medical College in Addis Ababa, Ethiopia.

METHODS

A retrospective cross-sectional study design was conducted to document the feasibility, safety and effectiveness of intra-amniotic digoxin. A structured questionnaire was used to collect selected sociodemographic data and clinical characteristics. Data were entered and analysed using SPSS statistical package version 20.

RESULTS

During the study period, 49 women received intra-amniotic digoxin. The success rate of intra-amniotic digoxin in this study was 95.9%. Thirty-seven (75.5%) procedures were performed by obstetrics and gynaecology residents and 12 (24.5%) were performed by family planning faculties. There were two out of hospital expulsions with no signs of life, and no other serious maternal complications were observed.

CONCLUSION

It is feasible for obstetrics and gynaecology trainees in Ethiopia to learn how to safely administer intra-amniotic digoxin to induce fetal demise for induced medical terminations.

Society of Family Planning clinical recommendations: Cervical preparation for dilation and evacuation at 20-24 weeks' gestation

Although only 1.3% of abortions in the United States are between 20 and 24 weeks' gestation, these procedures are associated with elevated risks of morbidity and mortality. Adequate cervical preparation before dilation and evacuation (D&E) at 20-24 weeks' gestation reduces procedural risk. For this gestational range, at least one day of cervical preparation with osmotic dilators is recommended before D&E. The use of overnight osmotic dilators alone is sufficient for most D&Es at 20-24 weeks' gestation. Dilapan-S® dilators require a shorter time to achieve maximum dilation, may be more effective than laminaria and may increase the likelihood of success on the first D&E attempt. The use of adjunctive mifepristone administered one-day pre-operatively at the time of osmotic dilator placement, should be considered because evidence demonstrates that it makes D&E subjectively easier at 20-24 weeks without increasing side effects. While older studies suggest that two-days of serial osmotic dilators provide greater dilation than one day of dilators, adjunctive mifepristone may be comparable to a second day of dilators. Adjunctive misoprostol administered on the day of D&E does not appear to affect initial cervical dilation and procedure time and compared with mifepristone is associated with more side effects, such as pain and nausea. Using overnight mifepristone and same-day misoprostol without osmotic dilators at 20-24 weeks' gestation lengthens D&E procedure time and appears to increase immediate complications, at least among less experienced providers. Some evidence shows the feasibility of same-day cervical preparation before D&E at 20-24 weeks using Dilapan-S® with adjunctive misoprostol or serial repeat dosing of misoprostol, but same-day preparation should be limited to providers with significant experience with these regimens. The Society of Family Planning recommends preoperative cervical preparation before D&E at 20-24 weeks' gestation. Further studies are needed to clarify the best means of preparing the cervix in order to minimize abortion complications and improve outcomes in this gestational range.

No. 360-Induced Abortion: Surgical Abortion and Second Trimester Medical Methods

OBJECTIVE

This guideline reviews evidence relating to the provision of surgical induced abortion (IA) and second trimester medical abortion, including pre- and post-procedural care.

INTENDED USERS

Gynaecologists, family physicians, nurses, midwives, residents, and other health care providers who currently or intend to provide and/or teach IAs.

TARGET POPULATION

Women with an unintended or abnormal first or second trimester pregnancy.

EVIDENCE

PubMed, Medline, and the Cochrane Database were searched using the key words: first-trimester surgical abortion, second-trimester surgical abortion, second-trimester medical abortion, dilation and evacuation, induction abortion, feticide, cervical preparation, cervical dilation, abortion complications. Results were restricted to English or French systematic reviews, randomized controlled trials, clinical trials, and observational studies published from 1979 to July 2017. National and international clinical practice guidelines were consulted for review. Grey literature was not searched.

VALUES

The quality of evidence in this document was rated using the Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) methodology framework. The summary of findings is available upon request.

BENEFITS, HARMS, AND/OR COSTS

IA is safe and effective. The benefits of IA outweigh the potential harms or costs. No new direct harms or costs identified with these guidelines.

Intra-amniotic digoxin for feticide between 21 and 30 weeks of gestation: a prospective study

OBJECTIVE

Intra-amniotic injection of digoxin is a well-known method for feticide before inducing a termination of pregnancy (TOP) at 17-24 weeks of gestation. Information on its effectiveness when administered after 24 weeks of gestation is limited. This study evaluated the efficacy of intra-amniotic digoxin injection for inducing fetal demise within 18-24 hours, at 21-30 weeks of gestation, and its safety.

DESIGN

Prospective cohort study.

SETTING

Tertiary university medical centre.

POPULATION

Women at 21-30 weeks of gestation with a singleton pregnancy, admitted for TOP.

METHODS

Intra-amniotic injection of 2 mg of digoxin was performed 1 day before medical TOP. Fetal heart activity was evaluated by ultrasound for 18-24 hours after the injection. Serum digoxin level and maternal electrocardiogram (ECG) were evaluated 6, 10, and 20 hours after injection.

MAIN OUTCOME MEASURE

Frequency of successful fetal demise.

RESULTS

Fifty-nine women participated in the study. The mean gestational age was 24⁺²  weeks (range 21⁺⁰ -30⁺⁰ ), with 29 (49.2%) beyond 24⁺⁰  weeks of gestation. Fetal cardiac activity arrest was achieved in 55/59 cases (93.2%). Normal maternal ECG recordings were noted in all cases. Mean serum digoxin levels 6 and 10 hours after injection were in the therapeutic range (1.3 ± 0.7 ng/l and 1.24 ± 0.49 ng/l, respectively) and below the toxic level (2 ng/l). Extramural delivery following digoxin did not occur. There were no cases of chorioamnionitis.

CONCLUSION

Intra-amniotic digoxin for feticide at 21-30 weeks of gestation in a singleton pregnancy appears effective and safe before TOP at advanced gestational ages.

TWEETABLE ABSTRACT

This study shows that feticide by intra-amniotic digoxin injection at 21-30 weeks of gestation appears effective and safe.

A qualitative study of digoxin injection before dilation and evacuation

OBJECTIVE

We sought to qualitatively understand patients' experiences with digoxin as a step before dilation and evacuation (D&E).

STUDY DESIGN

We recruited English-speaking women from one abortion health center where digoxin is routinely used before D&E. We interviewed participants one to three weeks after the D&E about physical and emotional experiences with digoxin and understanding of its purpose. Using grounded theory, we analyzed transcripts iteratively, identifying themes from interviews; we stopped recruitment when we reached thematic saturation.

RESULTS

We conducted 20 interviews and participants described mixed experiences. Three overarching themes from the qualitative interviews were: (1) physical and emotional discomfort; (2) varied understanding of digoxin's purpose and effects; and (3) reassurance. Most participants described significantly negative experiences with digoxin; however, many participants also described positive aspects of the injection intermingled with those negative experiences.

CONCLUSIONS

Participants' experiences with digoxin before D&E were both polarized and nuanced. While participants were largely clear about digoxin's action, they were much less clear about the reason for its use.

IMPLICATIONS

Both the clinical purpose for and patients' experiences with digoxin before D&E are complicated. Providers who continue to use digoxin should consider patient preferences in how they offer digoxin, and consider tools to ensure patient understanding.

Intra-fetal Compared With Intra-amniotic Digoxin Before Dilation and Evacuation: A Randomized Controlled Trial

OBJECTIVE

To compare the effectiveness of 1.0 mg intra-fetal or intra-amniotic digoxin to achieve fetal asystole before second-trimester surgical pregnancy termination.

METHODS

In a randomized trial, women received 1.0 mg transabdominal intra-fetal or intra-amniotic digoxin on the day of laminaria placement before dilation and evacuation between 20 and 24 weeks of gestation. The primary outcome was incidence of fetal asystole, documented immediately before dilation and evacuation. We planned to analyze the primary outcome by original group assignment as well as by as-treated and per-protocol populations. A sample size of 270 was needed to detect an 8% difference in failure rates between groups. Prespecified secondary outcomes included the incidence of adverse events, side effects, and procedural differences.

RESULTS

Between January 2012 and January 2013, we screened 381 women and randomized 270 women to receive intra-fetal (n=136) or intra-amniotic (n=134) digoxin. Characteristics were similar across groups; the mean gestational age was 21.6 weeks (standard deviation 1.2). The proportion of fetal asystole was higher in the intra-fetal group (128/135 [94.8%]) than the intra-amniotic group (107/130, 82.3%; relative risk of failure to achieve asystole 3.41, 95% confidence interval 1.52-7.68). Results were similar in the as-treated and per-protocol populations. There were no significant differences in adverse events or side effects and no differences in injection duration, operative time, or estimated blood loss.

CONCLUSION

Administration of intra-fetal injection of digoxin led to a higher proportion of participants achieving fetal asystole within 24 hours than intra-amniotic injection.

CLINICAL TRIAL REGISTRATION

ClinicalTrials.gov, https://clinicaltrials.gov, NCT01047748.

Induction of fetal demise before pregnancy termination: practices of family planning providers

OBJECTIVES

Our survey aimed to characterize the practice of inducing fetal demise before pregnancy termination among abortion providers, including its technical aspects and why providers have chosen to adopt it.

STUDY DESIGN

We conducted a survey of Family Planning Fellowship-trained or Fellowship-affiliated Family Planning (FP) subspecialists about their practice of inducing fetal demise, including questions regarding the circumstances in which they would induce demise, techniques used and rationales for choosing whether to adopt this practice.

RESULTS

Of the 169 FP subspecialists we surveyed, 105 (62%) responded. About half (52%) of respondents indicated that they routinely induced fetal demise before terminations in the second trimester. Providers' practices varied in the gestations at which they started inducing demise as well as the techniques used. Respondents provided legal, technical and psychological reasons for their decisions to induce demise.

CONCLUSION

Inducing fetal demise before second-trimester abortions is common among US FP specialists for multiple reasons. The absence of professional guidelines or robust data may contribute to the variance in the current practice patterns of inducing demise.

IMPLICATIONS

Our study documents the widespread practice of inducing fetal demise before second-trimester abortion and further describes wide variation in providers' methods and rationales for inducing demise. It is important for abortion providers as a professional group to come to a formal consensus on the appropriate use of these techniques and to determine whether such practices should be encouraged, tolerated or even permitted.

Efficacy and safety of medical abortion using mifepristone and buccal misoprostol through 63 days

OBJECTIVE

The aim of this study was to report on the safety and efficacy of an evidence-based medical abortion regimen utilizing 200 mg of mifepristone orally followed by home use of 800 mcg misoprostol buccally 24-48 h later through 63 days estimated gestational age.

STUDY DESIGN

We analyzed outcomes in women presenting for medical abortion between April 1, 2006, and May 31, 2011, using an evidence-based alternative to the United States Food and Drug Administration (FDA)-approved regimen. Cases were identified for this descriptive study from our electronic practice management (EPM) database, and our electronic database on adverse events was queried for information on efficacy and safety. The primary outcome was successful abortion. Logistic regression was used to identify predictors of successful abortion.

RESULTS

Among the 13,373 women who completed follow-up, efficacy of the regimen was 97.7%. Efficacy was highest at 29 to 35 days (98.8%) and 36 to 42 days (98.8%) of gestation and lowest at 57 to 63 days (95.5%). The odds of needing aspiration for any reason were greatest at higher gestational ages. Rates of infection requiring hospitalization and rates of transfusion were 0.01 and 0.03%, respectively.

CONCLUSIONS

An evidence-based regimen of 200 mg of mifepristone orally followed by home use of 800 mcg of buccal misoprostol 24-48 h later is safe and effective through 63 days estimated gestational age. Further, the need for aspiration for any reason was low, and hospitalization was rare.

IMPLICATIONS

This study reinforces the safety and efficacy of the evidence-based regimen for medical abortion (200 mg mifepristone orally followed by home use of 800 mcg of misoprostol buccally 24-48 h later) through 63 days estimated gestational age, and contributes to the existing evidence against restrictions requiring use of the FDA-approved regimen.

Feasibility, effectiveness and safety of transvaginal digoxin administration prior to dilation and evacuation

OBJECTIVES

This study evaluates the feasibility, efficacy and safety of transvaginal digoxin administration to induce fetal demise prior to dilation and evacuation.

STUDY DESIGN

This descriptive report from a single center involves a large case series of dilations and evacuations (D&Es) ranging from 18 to 22 weeks of gestation. Transvaginal feticidal injection with digoxin was attempted in 1640 cases; intrafetal, intraamniotic and combined (intrafetal and intraamniotic) injections were administered. Digoxin dosage ranged from 0.5 to 3.0 mg, with the majority receiving 1.0 mg. Cases were reviewed to determine feasibility, efficacy and adverse events.

RESULTS

Successful completion of transvaginal injection occurred in 98.5% (1637/1662) of eligible cases, and 1596 cases were evaluable for fetal demise. Demise occurred by the time of D&E in 99.4% of all cases; 99.7% of intrafetal injections resulted in fetal demise. Doses ≥1 mg were equally effective (98.1%-99.6%) regardless of injection site (intraamniotic, combined intrafetal/intraamniotic or intrafetal). Doses <1.0 mg were less successful at inducing demise if not administered intrafetally (p<.001). Rates of ruptured membranes (4.1%), chorioamnionitis (0.49%) and extramural deliveries (0.12%) were low. Patients who experienced complications were more likely to be of greater gestational age and have had a previous cesarean section.

CONCLUSIONS

Transvaginal digoxin administration is feasible, effective and safe.

IMPLICATION STATEMENT

This study demonstrates the feasibility, effectiveness and safety of transvaginal digoxin administration in a large clinical cohort. Future studies will be needed to determine if this method of administration improves patient satisfaction and outcomes when compared to transabdominal feticidal injections.

Transvaginal administration of intraamniotic digoxin prior to dilation and evacuation

BACKGROUND

Transabdominal injection of digoxin into the amniotic fluid or fetus to induce fetal demise before dilation and evacuation (D&E) abortion has become common practice since the passage of the Partial-Birth Abortion Ban Act in 2007.

STUDY DESIGN

We performed a prospective study to assess the feasibility of transvaginal administration of intraamniotic digoxin the day before D&E. All women between 18 0/7 and 23 5/7 weeks of gestation seeking termination from December 2009 to May 2011 were approached for study participation. Women who declined participation were asked to identify their primary rationale. For women declining study participation, transection of the umbilical cord during D&E was performed to meet the requirements of the ban.

RESULTS

Over 18 months, 134 women met study entry criteria and 108 (81%) declined to participate. Of the 26 women who enrolled, 1.0 mg undiluted digoxin was successfully administered transvaginally in 24 (92%, 95% confidence interval 75%-99%). The most common reasons for declining participation were discomfort with preoperatively inducing fetal demise (37%) and desire to avoid a medically unnecessary medication (36%).

CONCLUSIONS

Transvaginal administration of digoxin is a feasible alternative to transabdominal administration to induce preoperative fetal demise. The majority of women decline digoxin administration when an alternative is available.