Is intrauterine surgery justified? Report from the working group on ultrasound in obstetrics of the World Association of Perinatal Medicine (WAPM)

Maternal and perinatal outcomes of minimally invasive fetal surgeries: experience from two reference centers in Rio de Janeiro, Brazil

BACKGROUND

Concerns regarding high open surgery-related maternal morbidity have led to improvements in minimally invasive fetal surgeries.

OBJECTIVE

To analyze the perinatal and maternal outcomes of minimally invasive fetal surgery performed in Rio de Janeiro, Brazil.

DESIGN AND SETTING

Retrospective cohort study conducted in two tertiary reference centers.

METHODS

This retrospective descriptive study was conducted using medical records from 2011 to 2019. The outcomes included maternal and pregnancy complications, neonatal morbidity, and mortality from the intrauterine period to hospital discharge.

RESULTS

Fifty mothers and 70 fetuses were included in this study. The pathologies included twin-twin transfusion syndrome, congenital diaphragmatic hernia, myelomeningocele, lower urinary tract obstruction, pleural effusion, congenital upper airway obstruction syndrome, and amniotic band syndrome. Regarding maternal complications, 8% had anesthetic complications, 12% had infectious complications, and 6% required blood transfusions. The mean gestational age at surgery was 25 weeks, the mean gestational age at delivery was 33 weeks, 83% of fetuses undergoing surgery were born alive, and 69% were discharged from the neonatal intensive care unit.

CONCLUSION

Despite the small sample size, we demonstrated that minimally invasive fetal surgeries are safe for pregnant women. Perinatal mortality and prematurity rates in this study were comparable to those previously. Prematurity remains the most significant problem associated with fetal surgery.

Ethical considerations of maternal-fetal surgery

The practice of maternal-fetal surgery (MFS) has expanded from lethal fetal conditions to conditions which are significantly disabling but not a lethal fetal abnormality. The inclusion of myelomeningocele within the scope of MFS in the 1990s sparked a renewed debate over the ethics of MFS. While demonstrating increasing efficacy and range of application, MFS continues to be ethically fraught due to the inherent tension between maternal and fetal interests. Ethical issues central to MFS include the patienthood of the fetus; the balance of risks and benefits between the woman and fetus; informed consent for experimental procedures; and determination of conditions that meet ethical qualifications for MFS intervention. These concerns are likely to persist and evolve as perinatal medicine continues to advance. Here we summarize the current state of MFS ethics, highlighting the major positions in the literature thus far as well as examine future directions. It is essential robust discussions of these important issues continue both to ensure ethical medical practice and to provide support to clinicians, pregnant women, and their families.

Additional benefits of three-dimensional ultrasound for prenatal assessment of twins

Three-dimensional ultrasound (3DUS) may provide additional information for prenatal assessment of twins. It may improve the diagnostic confidence of dating, nuchal translucency (NT) and chorionicity assignment in twin pregnancies. The "virtual 3DUS placentoscopy" can guide selective fetoscopic laser photocoagulation (SFLP) to treat twin-twin transfusion syndrome (TTTS). Volumetric assessment of the dysmorphic acardiac twin with the Virtual Organ Computer-aided Analysis (VOCAL) software is more accurate than the conventional ultrasound measurement. Twin anemia polycythemia (TAP) sequence and selective intrauterine growth restriction (sIUGR) may be clinically monitored with 3DUS placental volume (PV) and power Doppler vascular indices. Congenital anomalies are more common in twins. Evaluation of fetal anomalies with 3DUS could assist perinatal management. The 3DUS power Doppler can provide a better understanding of true and false umbilical cord knots, which are commonly found in monoamniotic (MA) twins. Single demise in monochorionic (MC) twin pregnancies can cause severe neurologic morbidity in the surviving co-twin. Prenatal prediction of brain injury in the surviving co-twin with unremarkable neurosonographic examination is difficult. The 3DUS power Doppler may aid in prenatal detection of subtle abnormal cerebral perfusion. Prenatal assessment of conjoined twins with 3DUS is important if emergency postnatal surgical separation is anticipated. There is no significant additional advantage in using real-time 3DUS to guide prenatal interventions. Assessment of the cervix and pelvic floor during twin pregnancies is enhanced with 3DUS. Due to lack of high-quality studies, routine prenatal 3DUS in twin pregnancies needs to be balanced with risks of excessive ultrasound exposure.

Ethical and Legal Dilemmas Around Termination of Pregnancy for Severe Fetal Hydrocephalus, Spina Bifida Aperta and Meningomyelocoella

Introduction:

There are many ethical and moral dilemmas regarding the termination of pregnancy(TOP) with severe fetal anomalies.

Aim:

Our aim is to present a case of severe fetal hydrocephalus (HCP), spina bifida aperta and, meningomyelocoella (MMC).

Case report:

A gynecologist examined a 23-year-old patient with vital pregnancy of 24/25 week of gestation (WG) with the anomaly of the fetus. At the Perinatological Medical Advisory Board, a decision was made that the pregnancy should be continued and monitored bearing in mind that pregnancy exceeded the legal framework for TOP. Medical Advisory Board’s ultrasound examination showed the following: severe hydrocephalus (HCP), spina bifida aperta, hyperehogen intestine, pes equinovarus. Via multidisciplinary consultation it was decided to make a delivery with the elective caesarian section (CS) causing as little trauma to the fetus as possible, with 37 WG completed due to the pelvic presentation and fetal anomalies. The patient gave birth via CS to a live female newborn–birth weight 3920 grams, birth length 56 cm, head circumference 48 cm, and Apgar score 8/8. The head was hydrocephalic with spaced suture. There was thoracolumbar defect of spina bifida aperta and meningomyelocele (MMC) 10x12 cm in size. An urgent surgical procedure - the external ventricular derivation of the liquor, and then the successful resection and plastic meningomyelocele was performed by a team of neuro and plastic surgeons. During the fourth postoperative day due to a suspicion of abscess collection and febrility of the mother a relaparotomy is performed and the abscess collection of Retzius space was found. Due to the fall in blood count, blood transfusion in a total dose of 580 ml was given. The patient was discharged on a home treatment as she had a regular general and local status. After the surgery, the condition of the newborn resulted in deterioration, the progression of HCP and dehiscence of head wounds and the thoracolumbar region, in spite of all the measures taken. At that time a decision was made to provide palliative care and this decision was conveyed to the mother. The child had a prolonged apnoeic episode and was not resuscitated. The child died in hospital after surviving for two months postpartum.

Conclusion:

Indication of TOP based on fetal anomalies could be a medical decision but also a personal moral choice of the mother related to legal rules, socio-cultural values and religious beliefs.

Medical genetic services in a developing country: lesson from Thailand

PURPOSE OF REVIEW

The aim of the review was to give an example of how advances in medical genetics impact a developing country and how Thailand struggles to improve medical genetic services.

RECENT FINDINGS

Thailand is an example of a developing country with limited resources and low geneticist-to-population ratio. The country formally followed decentralized healthcare system (even though practically centralized) and is a nation with growing public interest in medical genetic technology. Nonetheless, efforts have been and are still being made in expanding clinical genetics services, improving access to laboratory diagnosis, increasing rare disease medication in national formulary, and the training of medical genetics personnel. For an endemic genetic disorder such as thalassemia, a universal prevention and control program is available and has had some success.

SUMMARY

Lesson learned in country like Thailand may be a useful model for other developing nations. Several strategies can be attempted to integrate the advances in medical genetics into medical practices in developing countries with relatively low income per capita and geographic discrepancy in healthcare distribution.

Rapid initiation of fetal therapy services with a system of learner-centred training under proctorship: the National University Hospital (Singapore) experience

INTRODUCTION

Management of complicated monochorionic twins and certain intrauterine structural anomalies is a pressing challenge in communities that still lack advanced fetal therapy. We describe our efforts to rapidly initiate selective feticide using radiofrequency ablation (RFA) and selective fetoscopic laser photocoagulation (SFLP) for twin-to-twin transfusion syndrome (TTTS), and present the latter as a potential model for aspiring fetal therapy units.

METHODS

Five pregnancies with fetal complications were identified for RFA. Three pregnancies with Stage II TTTS were selected for SFLP. While RFA techniques utilising ultrasonography skills were quickly mastered, SFLP required stepwise technical learning with an overseas-based proctor, who provided real-time hands-off supervision.

RESULTS

All co-twins were live-born following selective feticide; one singleton pregnancy was lost. Fetoscopy techniques were learned in a stepwise manner and procedures were performed by a novice team of surgeons under proctorship. Dichorionisation was completed in only one patient. Five of six twins were live-born near term. One pregnancy developed twin anaemia-polycythaemia sequence, while another was complicated by co-twin demise.

DISCUSSION

Proctor-supervised directed learning facilitated the rapid provision of basic fetal therapy services by our unit. While traditional apprenticeship is important for building individual expertise, this system is complementary and may benefit other small units committed to providing these services.