Twin anemia polycythemia sequence: Successful laser photocoagulation treatment and placental histopathological findings

OBJECTIVE

Twin anemia polycythemia sequence (TAPS) is a rare complication of monochorionic twin pregnancies, which can occur either spontaneously or after laser photocoagulation procedure for twin to twin transfusion syndrome. TAPS is associated with poor perinatal outcomes and clear screening guidelines for this disease are lacking resulting in under-diagnosis of TAPS.

CASE REPORT

The purpose of this report is to discuss a case of severe spontaneous TAPS, which was successfully treated with favorable outcome, to describe the placental histopathological findings, and to propose an algorithm for management and follow up of this rare condition.

CONCLUSION

Laser photocoagulation of the placental anastomoses, despite technical challenges, can be safely performed in cases of TAPS. Even with prenatal evidence of successful resolution of TAPS, close fetal surveillance is warranted because of the persistence of placental villous immaturity.

Perinatal outcomes of iatrogenic chorioamniotic separation following fetoscopic surgery: systematic review and meta-analysis

OBJECTIVE

To compare the perinatal outcomes between pregnancies with and those without iatrogenic chorioamniotic separation (iCAS) following fetoscopic intervention.

METHODS

We performed a search in PubMed, EMBASE, Scopus, Web of Science and Google Scholar from inception up to December 2020 for studies comparing perinatal outcomes between pregnancies that developed and those that did not develop iCAS after fetoscopic intervention for twin-to-twin transfusion syndrome (TTTS), open neural tube defect (ONTD) or congenital diaphragmatic hernia. A random-effects model was used to pool the mean differences (MD) or odds ratios (OR) and the corresponding 95% CI. The primary outcome was neonatal survival. Secondary outcomes included gestational age (GA) at intervention and at delivery, interval from intervention to delivery and incidence of preterm prelabor rupture of membranes (PPROM) and preterm delivery. The methodological quality of the included studies was evaluated using the Newcastle-Ottawa scale.

RESULTS

The search identified 348 records, of which seven studies (six on fetoscopic laser photocoagulation (FLP) for TTTS and one on fetoscopic repair for ONTD) assessed the perinatal outcomes of pregnancies that developed iCAS after fetoscopic intervention. Given that only one study reported on fetoscopic ONTD repair, the meta-analysis was limited to TTTS pregnancies and included six studies (total of 1881 pregnancies). Pregnancies that developed iCAS after FLP for TTTS, compared with those that did not, had significantly lower GA at the time of intervention (weeks) (MD, -1.07 (95% CI, -1.89 to -0.24); P = 0.01) and at delivery (weeks) (MD, -1.74 (95% CI, -3.13 to -0.34); P = 0.01) and significantly lower neonatal survival (OR, 0.41 (95% CI, 0.24-0.70); P = 0.001). In addition, development of iCAS after FLP for TTTS increased significantly the risk for PPROM < 34 weeks' gestation (OR, 3.98 (95% CI, 1.76-9.03); P < 0.001) and preterm delivery < 32 weeks (OR, 1.80 (95% CI, 1.16-2.80); P = 0.008).

CONCLUSIONS

iCAS is a common complication after FLP for TTTS. In patients undergoing FLP for TTTS, iCAS develops more often with earlier GA at intervention and is associated with earlier GA at delivery, higher risk of PPROM < 34 weeks' gestation and preterm delivery < 32 weeks and lower neonatal survival. Given the limitations of this meta-analysis and lack of literature reporting on other types of fetoscopic intervention, the presented findings should be interpreted with caution and should not be generalized to fetoscopic procedures used to treat other fetal conditions. © 2021 International Society of Ultrasound in Obstetrics and Gynecology.

Vaginal progesterone for preterm birth prevention in women with arrested preterm labor

OBJECTIVE

We tested the hypothesis that administration of vaginal progesterone in women with arrested preterm labor would result in lower rates of preterm birth <37 weeks compared to placebo.

STUDY DESIGN

We performed a randomized, placebo-controlled trial comparing vaginal progesterone to placebo in women with arrested preterm labor. Our trial included women with a singleton or twin gestation at 24^0/7-33^6/7 weeks' gestation who presented with preterm labor with cervical dilation ≥1 centimeter but remained undelivered. Participants were randomized to receive vaginal progesterone 200 mg daily or an identical placebo. The primary outcome was preterm birth <37 weeks. We performed an updated systematic review and meta-analysis of clinical trials, including our results. We searched MEDLINE, EMBASE, CINHAL, Scopus, the Cochrane Database of Systematic Reviews, and ClinicalTrials.gov using the key terms to identify relevant trials. The risk of bias was appraised using the Cochrane risk-of-bias tool. Data were synthesized using random-effects models. Heterogeneity was assessed using Higgins I².

RESULTS

The randomized trial was prematurely terminated due to slow recruitment. There were 18 women randomized to receive vaginal progesterone who had complete follow-up data and 18 women in the placebo group. The risk of preterm birth <37 weeks was not significantly different in the groups (RR 1.10, 95% CI 0.63-1.19). Secondary outcomes were also similar. Thirteen trials with 1658 women (835 in the vaginal progesterone and 823 in the control groups) were included in the meta-analysis. Risk of preterm birth <37 weeks was similar in women who received progesterone and those in the control group (pooled RR 1.06, 95% CI 0.83-1.35). Latency was significantly longer among women with arrested preterm labor who received vaginal progesterone (weighted mean difference: 9.2 d, 95% CI 3.2-15.1), but further analysis showed that prolonged latency was only observed in the subgroup of studies that were not placebo-controlled.

CONCLUSIONS

This randomized controlled trial and meta-analysis do not support the use of vaginal progesterone for the prevention of preterm birth in women who present in preterm labor.

Longitudinal evaluation of motor function in patients who underwent prenatal or postnatal neural tube defect repair

OBJECTIVE

To compare the evolution of motor function from mid-gestation to 12 months of age between prenatally and postnatally repaired cases of open neural tube defect (ONTD).

METHODS

This was a retrospective cohort study of all fetuses that underwent prenatal (fetoscopic or open hysterotomy) or postnatal ONTD repair at a single institution between November 2011 and December 2018. The anatomical level of the lesion was defined as the upper bony spinal defect at initial magnetic resonance imaging assessment. Prenatal motor function of the lower extremities was evaluated by ultrasound according to the metameric level of the neurological lesion, based on the methodology of Carreras et al. Fetal motor function was assessed at referral, at 6 weeks after surgery in prenatally repaired cases or 6 weeks after referral in postnatally repaired cases (6-week follow-up) and at the last scan before delivery. In addition, motor function was assessed by a detailed neurological examination at birth and 12 months of age. First sacral (S1) neurological level of the lesion was considered as intact motor function. For statistical comparisons, we attributed numerical scores to each neurological level and motor function was expressed as median (range) neurological level. Motor function (as numerical score) and the proportion of cases with intact motor function and with motor function two or more levels better than expected based on the anatomical level of the lesion were compared between the prenatal- and postnatal-repair groups. Fetal motor function was compared to the anatomical level of the lesion at referral and a better motor function was defined when it was two or more levels better than the anatomical level of the lesion. To assess the evolution of motor function, we compared motor function at referral with that at each follow-up assessment using paired t-tests.

RESULTS

We included 127 patients with ONTD, of whom 93 underwent prenatal (51 fetoscopic and 42 open hysterotomy) and 34 postnatal repair. At the time of referral, cases in the prenatal- and postnatal-repair groups presented with a similar anatomical level of lesion (L3 (T9-S1) vs L3 (T7-S1); P = 0.52), similar motor function (S1 (L1-S1) vs S1 (L1-S1); P = 0.52) and a similar proportion of cases with intact motor function (81% vs 79%; P = 0.88) and with motor function two or more levels better than expected based on the anatomical level of the lesion (62% vs 74%; P = 0.24). When compared with prenatally repaired cases, postnatally repaired cases showed worse motor function at birth (S1 (L1-S1) vs L4 (L1-S1); P < 0.01) and at 12 months of age (S1 (L1-S1) vs L4 (L1-S1); P < 0.01). In the prenatal-repair group, motor function remained stable from the time of referral to 12 months of age (P = 0.26). Furthermore, the proportion of patients with intact motor function at referral (81% (75/93)) was similar to that at the 6-week follow-up (74% (64/87)), at the last scan before birth (74% (42/57)), at birth (68% (63/93)) and at 12 months of age (67% (39/58)) in the prenatal-repair group. In the postnatal-repair group, worse motor function, starting from the third trimester to 12 months of age, was observed. The proportion of patients with intact motor function at referral (79% (27/34)) was similar to that at 6-week follow-up (80% (12/15); P = 0.92), but was lower at the last assessment before birth (25% (2/8); P < 0.01), at birth (24% (8/34); P < 0.01) and at 12 months of age (28% (7/25); P < 0.01). Similar findings were noted when assessing the evolution of the proportion of cases with motor function two or more levels better than expected based on the anatomical level of the lesion in each group.

CONCLUSIONS

Infants with ONTD that underwent postnatal repair had worse motor function at birth and at 12 months of age than at mid-gestation and when compared with infants that underwent prenatal ONTD repair. Prenatal motor function assessment by ultrasound is an adequate tool to identify those infants who should have a good clinical motor function after delivery. Information obtained by fetal motor function assessment can have an important role for patient counseling and case selection for surgery. © 2020 International Society of Ultrasound in Obstetrics and Gynecology.

Early laser surgery is not associated with very preterm delivery or reduced neonatal survival in TTTS

OBJECTIVE

To evaluate the association of laser photocoagulation of placental anastomoses (LPA) prior to 18 weeks' gestation (early LPA) with very preterm delivery and neonatal survival in pregnancies with twin-twin transfusion syndrome (TTTS).

METHODS

This was a retrospective cohort study of monochorionic diamniotic twin pregnancies with TTTS undergoing LPA between 2002 and 2018 at two institutions. The rates of delivery < 28, < 30 and < 32 weeks' gestation, preterm prelabor rupture of membranes (PPROM) and 30-day survival of one or both infants were compared between pregnancies undergoing early LPA and those undergoing LPA ≥ 18 weeks' gestation. Regression analysis was performed to determine the association of early LPA with very preterm delivery and 30-day survival, adjusted for Quintero stage, study phase, selective fetal growth restriction, gestational age at delivery, maternal age ≥ 35 years, body mass index > 35 kg/m² , placental location, use of Seldinger method to place the operative trocar, size of the trocar, participating center, use of Solomon technique, cerclage and PPROM. Survival analysis using the Cox proportional hazard model was applied to examine the LPA-to-delivery interval according to the timing of surgery, adjusted for confounding variables.

RESULTS

A total of 414 TTTS pregnancies were included in the study, of which 68 (16.4%) underwent early LPA. In the total cohort, the incidence of delivery at < 28, < 30 and < 32 weeks' gestation was 22.7%, 39.6% and 53.4%, respectively. Survival of both twins and survival of at least one twin at 30 days were 67.5% and 90.8%, respectively. No significant difference was noted between pregnancies that underwent early LPA and those that had LPA ≥ 18 weeks in the rate of delivery < 28 weeks (19.1% vs 23.4%; P = 0.4), < 30 weeks (38.2% vs 39.9%; P = 0.8) and < 32 weeks (44.1% vs 55.2%; P = 0.1) and PPROM (29.0% vs 24.1%; P = 0.4), or in the incidence of double-twin survival (63.9% vs 68.1%; P = 0.5) and survival of at least one infant (91.8% vs 90.6%; P = 0.7) at 30 days. Early LPA was not associated with very preterm delivery or neonatal survival in the regression analyses. Early LPA was associated with a longer LPA-to-delivery interval compared with LPA performed ≥ 18 weeks (median, 106.9 days (range, 2-164 days) vs median, 69.3 days (range, 0-146 days); P < 0.001) when adjusted for confounding variables (hazard ratio, 2.56 (95% CI, 1.76-3.73); P < 0.001).

CONCLUSION

Laser surgery before 18 weeks is not associated with an increased rate of very preterm delivery and PPROM or with reduced neonatal survival when compared with LPA after 18 weeks. © 2020 International Society of Ultrasound in Obstetrics and Gynecology.

Economic analysis of prenatal fetoscopic vs open-hysterotomy repair of open neural tube defect

OBJECTIVE

Fetal repair of an open neural tube defect (ONTD) by open hysterotomy has been shown to reduce the need for ventriculoperitoneal shunting and improve motor outcomes for infants, but increases the risk of Cesarean section and prematurity. Fetoscopic repair is an alternative approach that may confer similar neurological benefits but allows for vaginal delivery and reduces the incidence of hysterotomy-related complications. We sought to compare the costs of care from fetal surgery until neonatal discharge, as well as the clinical outcomes, associated with each surgical approach.

METHODS

This was a retrospective cohort study of patients who underwent prenatal ONTD repair, using either the open-hysterotomy or the fetoscopic approach, at a single institution between 2012 and 2018. Clinical outcomes were collected by chart review. A cost-consequence analysis was conducted from the hospital perspective, and included all inpatient and ambulatory hospital and physician costs incurred for the care of mothers and their infants, from the time of maternal admission for fetal ONTD repair up to postnatal maternal and infant discharge. Costs were estimated using cost-to-charge ratios for hospital billing and the Medicare physician fee schedule for physician billing.

RESULTS

Seventy-eight patients were included in the analysis, of whom 47 underwent fetoscopic repair and 31 underwent open-hysterotomy repair. In the fetoscopic-repair group, compared with the open-repair group, fewer women underwent Cesarean section (53% vs 100%; P < 0.001) and the median gestational age at birth was significantly higher (38.1 weeks (interquartile range (IQR), 35.2-39.1 weeks) vs 35.7 weeks (IQR, 33.9-37.0 weeks); P < 0.001). No case of uterine dehiscence was observed in the fetoscopic-repair group, compared with an incidence of 16% in the open-repair group. After adjusting for baseline characteristics, there was no significant difference in the total cost of care between the fetoscopic-repair and the open-repair groups (median, $76 978 (IQR, $60 312-$115 386) vs $65 103 (IQR, $57 758-$108 103); P = 0.458).

CONCLUSIONS

Fetoscopic repair of ONTD, when compared with the open-hysterotomy approach, reduces the incidence of Cesarean section and preterm delivery with no significant difference in total costs of care from surgery to infant discharge. This novel approach may represent a cost-effective alternative to improve maternal and neonatal outcomes for this high-risk population. © 2021 International Society of Ultrasound in Obstetrics and Gynecology.

YouTube as a Source of Patient Information Regarding Placenta Accreta Spectrum

OBJECTIVE

 As the awareness of the accompanying morbidity of placenta accreta spectrum (PAS) has increased over recent decades. We sought to analyze the precision and reliability of the currently available content regarding PAS on YouTube.

STUDY DESIGN

 A YouTube search was performed on June 17, 2019 by using the search terms "placenta accreta," "PAS," and "invasive placentation." Search results were sorted by relevance, and up to 200 videos per search term were systematically evaluated by four independent reviewers. A quality assessment checklist relating to aspects of PAS was developed with a Likert's scale from 0 to 12 points to quantify video content. Videos were classified as poor educational quality (grade 0 to ≤4), moderate quality (grade >4-8), and high quality (grade >8-12).

RESULTS

 Of the 318 videos identified, 99 videos met inclusion criteria. The majority of videos (61.6%) were produced by a professional source, that is, appearing to be from a hospital, university, or educational service. Of the remaining videos, 16.2% were classified as personal, that is, posted from personal YouTube accounts and depicting a personal or family member experience, and 22.2% were classified as other. The majority of the "other" category consisted of news segments and short clips from talk shows. Overall, 60.6% of videos were of poor educational quality, 32.3% were of moderate quality, and 7.1% were deemed high quality. All seven of the high-quality videos were produced by a professional source and intended for an audience of medical professionals. There were neither high-quality videos intended for the general public nor the likely affected and relevant patient population.

CONCLUSION

 This study suggests that the currently available videos on YouTube regarding PAS are poor educational sources for patients seeking information, and demonstrates a need for high-quality content videos produced by medical professionals specifically focused on meeting the needs of patient population.

KEY POINTS

· Awareness of the accompanying morbidity of placenta accreta spectrum has increased over recent decades.. · YouTube videos are poor educational sources for patients seeking information regarding PAS.. · YouTube videos and all social media warrant improvements regarding patient's information..

Impact of the cystic neural tube defects on fetal motor function in prenatal myelomeningocele repairs: A retrospective cohort study

OBJECTIVE

To determine the impact of the lesion type (cystic [myelomeningocele] or flat [myeloschisis]) on the fetal motor function (MF) in cases candidates for prenatal open neural tube defect (ONTD) repair.

METHODS

Retrospective cohort study of patients with ONTD who underwent prenatal repair at a single institution between 2011 and 2019. The lesion type and the measurements of the length and width of the lesions to calculate the surface of the ellipsoid lesion were performed using MR scans. Prenatal MF of the lower extremities was evaluated by ultrasound following a metameric distribution at the time of referral. Intact MF was defined as the observation of plantar flexion of the ankle. Logistic regression was performed to determine the predictive value of the type of lesion for having an intact MF at the time of referral.

RESULTS

103 patients were included at 22.9 (19-25.4) weeks; 65% had cystic and 35% had flat lesions. At the time of referral, there was a higher proportion of cases with an intact MF in the presence of flat lesions (34/36; 94.4%) as compared to cystic lesion (48/67; 71.6%, p < 0.01). When adjusting for gestational age and anatomical level of the lesion, flat ONTD were 3.1 times more likely to be associated by intact motor function (CI%95 [2.1-4.6], p < 0.01) at the time of referral.

CONCLUSION

Cystic ONTD are more likely to be associated with impaired MF at mid-gestation in candidates for prenatal ONTD repair.

Is ventriculomegaly and hindbrain herniation seen before and after prenatal neural tube defect repair associated with a worse functional level than anatomical level at birth?

OBJECTIVE

To determine if the evaluation of the fetal ventricular system and hindbrain herniation (HBH) is associated with motor outcome at birth in prenatally repaired open neural tube defect (NTD).

METHODS

Retrospective cohort study of 47 patients with NTD who underwent prenatal repair (17 fetoscopic; 30 open-hysterotomy). At referral and 6 weeks postoperatively, the degree of HBH, ventricular atrial widths and ventricular volume were evaluated by MRI. Head circumference and ventricular atrial widths were measured on ultrasound at referral and during the last ultrasound before delivery. Anatomic level of the lesion (LL) was determined based on the upper bony spinal defect detected by ultrasound. We considered the functional level as worse than anatomical level at birth when the motor level was equal or worse than the anatomical LL.

RESULTS

26% (12/47) of the cases showed worse functional level than anatomical level at birth. Having a HBH below C1 at the time of referral was associated with a worse functional level than anatomical level at birth (OR = 9.7, CI95 [2.2-42.8], p < 0.01). None of the other brain parameters showed a significant association with motor outcomes at birth.

CONCLUSIONS

HBH below C1 before surgery was associated with a worse functional level than anatomical level at birth.

Accuracy of Ultrasound to Predict Neonatal Birth Weight Among Fetuses With Gastroschisis: Impact on Timing of Delivery

OBJECTIVES

To determine the accuracy of ultrasound estimation of fetal weight among fetuses with gastroschisis and how the diagnosis of fetal growth restriction (FGR) affects the timing of delivery.

METHODS

This was a retrospective cohort study including all fetuses with a diagnosis of gastroschisis at our institution from November 2012 through October 2017. We excluded multiple gestations, pregnancies with major structural or chromosomal abnormalities, and those for which prenatal and postnatal follow-up were unavailable. Performance characteristics of ultrasound to predict being small for gestational age (SGA) were calculated for the first and last ultrasound estimations of fetal weight.

RESULTS

Our cohort included 75 cases of gastroschisis. At the initial ultrasound estimation, 15 of 58 (25.9%) fetuses met criteria for FGR; 48 of 70 (68.6%) met criteria at the time of the last ultrasound estimation (median, 34.7 weeks). Cesarean delivery was performed for 37 of 75 (49.3%), with FGR and concern for fetal distress as the indication for delivery in 17 of 37 (45.9%). Only 6 of 17 (35.3%) of the neonates born by cesarean delivery for an indication of FGR and fetal distress were SGA. The initial ultrasound designation of FGR corresponded to SGA at birth in 8 of 15 (53.3%), whereas the last ultrasound estimation corresponded to SGA in 17 of 48 (35.4%). The initial ultrasound estimation agreed with the last ultrasound estimation before delivery with the diagnosis of FGR in 13 of 15 (86.7%).

CONCLUSIONS

Ultrasound in the third trimester was sensitive but had a low positive predictive value and low accuracy for the diagnosis of SGA at birth for fetuses with gastroschisis. A large proportion of fetuses were born by cesarean delivery with indications related to FGR or fetal concerns.

Fetal endoscopic tracheal occlusion and pulmonary hypertension in moderate congenital diaphragmatic hernia

OBJECTIVE

To study the role of fetal endoscopic tracheal occlusion (FETO) on resolution of pulmonary hypertension (PH) in fetuses with isolated moderate left-sided diaphragmatic hernia (CDH).

METHODS

This retrospective study included fetuses with CDH evaluated between February 2004 and July 2017. Using the tracheal occlusion to accelerate lung growth (TOTAL) trial definition, we classified fetuses into moderate left CDH if O/E-LHR (observed/expected-lung head ratio) was 25-34.9% regardless of liver position or O/E-LHR of 35-44.9% if liver was in the chest. Postnatal echocardiograms were used to diagnose PH. Logistic regression analyses were performed to determine the relationship of FETO with study outcomes.

RESULTS

Of 184 cases with no other major anomalies, 30 (16%) met criteria. There were nine FETO and 21 non-FETO cases. By hospital discharge, a higher proportion of infants in the FETO group had resolution of PH (87.5 (7/8) vs. 40% (8/20); p=.013). FETO was associated with adjusted odds ratio of 17.3 (95% CI: 1.75-171; p=.015) to resolve PH by hospital discharge. No significant differences were noted in need for ECMO or survival to discharge between groups.

CONCLUSIONS

Infants with moderate left-sided CDH according to O/E-LHR, FETO is associated with resolution of PH by the time of hospital discharge.

Novel scoring system for determining fetal candidacy for prenatal intervention for severe congenital lower urinary tract obstruction

OBJECTIVES

To evaluate a novel scoring system that combines several prenatal parameters for selecting ideal candidates for fetal intervention, and for predicting postnatal survival in patients with severe fetal lower urinary tract obstruction (LUTO).

METHODS

We retrospectively reviewed all cases of severe LUTO evaluated for fetal intervention in a single large fetal center between January 2013 and December 2017. A scoring system for determining fetal candidacy for intervention was retrospectively developed based on postnatal outcomes. The proposed scoring system included fetal urinary biochemistry, renal ultrasound parameters, initial bladder volume, and degree of bladder refill. Relevant demographic characteristics, ultrasound reports and laboratory results were reviewed. Receiver operating characteristic (ROC) curves were used to select the cut-off values for initial bladder volume and degree of bladder refill and to evaluate the performance of the scoring system in predicting postnatal death.

RESULTS

Of the 79 LUTO patients evaluated, 31 were eligible for the study. The overall 6-month postnatal survival was 64.5 % (20/31). A scoring system (0-8) was suggested with 2 points for unfavorable biochemistry, 4 points for ultrasound evidence of dysplastic kidneys, 1 point for inadequate initial bladder volume and 1 point for inadequate bladder refill. Scores>3 (N = 7) were associated with 0 % 6-month survival. The ROC curve for predicting postnatal mortality showed area under curve (AUC) of 0.82 (95 % CI 0.65-0.99). Subgroup analysis within subjects who underwent fetal intervention (N = 22) also confirmed the significance of the distribution of the scoring system between groups who survived and those who did not after adjustment for GA at delivery (p = 0.01).

CONCLUSION

We propose a novel scoring system for antenatal evaluation of patients with severe LUTO which may be useful in selecting those candidates most appropriate for intervention and in counseling parents about predicted postnatal outcome.

Enhanced Recovery after Surgery: Benefits for the Fetal Surgery Patient

BACKGROUND

The fetoscopic approach to the prenatal closure of a neural tube defect (NTD) may offer similar advantages to the newborn compared to prenatal open closure of a NTD, with a reduction in maternal risks. Enhanced recovery after surgery (ERAS) protocols have been applied to different surgical procedures with documented advantages. We modified the perioperative care of patients undergoing in utero repair of myelomeningocele with the goal of enhancing the recovery. A retrospective study comparing traditional management to the ERAS protocol was conducted.

AIMS

Primary aim was to evaluate the length of stay (LOS). Secondary outcomes included pain scores, time to oral intake, opioid-induced side effects, and respiratory complications.

METHODS

Thirty patients who underwent a mid-gestation fetoscopic closure of a NTD were included. Data analyzed include demographics, comorbidities, LOS, anatomical location of the NTD, magnesium sulfate doses and duration of administration, oxygen requirements, duration of the postoperative epidural infusion, duration of surgery and anesthesia, incidence of postoperative nausea and vomiting, respiratory complications, time to oral intake, pain scores, and sedation scores. Differences between the treatment groups were compared using the independent sample t-test or Mann-Whitney Ʋ test.

RESULTS

Of the 30 patients, 10 patients were managed according to the ERAS protocol and 20 patients according to the traditional management (1:2 ratio). The mean gestational age at the time of intervention for the traditional and ERAS groups was 24.9 ± 0.5 weeks and 24.8 ± 0.5 weeks, respectively. Compared to the traditional group, the LOS was reduced in the ERAS group to 112.5 ± 12.6 h (4.7 ± 0.5 days) from 179.7 ± 87.9 h (7.5 ± 3.7 days) (p = 0.012). The time to oral intake was also shorter 502.6 ± 473.4 min versus 1015.6 ± 698.2 min; p = 0.049. Oxygen requirements were prolonged in the traditional group (1843.7 ± 1262.6 min vs. 1051.7 ± 1078.1 min p = 0.052). The total duration of magnesium sulfate was longer for patients in the traditional group (2125.6 ± 727.1 min vs. 1429.5 ± 553.8 min; p = 0.006). No statistically significant difference in pain scores was observed between the groups.

CONCLUSIONS

Establishing an ERAS protocol for fetoscopic in utero repair of NTDs approach is feasible with the advantages of decreased postoperative LOS, reduced oxygen requirements, lower duration of magnesium sulfate infusion, and facilitation of earlier oral intake without compromising the pain scores.

Perinatal outcome of twin-to-twin transfusion syndrome complicated with incidental septostomy after laser photocoagulation: A systematic review and meta-analysis

AIM

To evaluate perinatal outcomes of incidental septostomy (IS) after laser photocoagulation for twin-to-twin transfusion syndrome (TTTS), and to compare the outcomes with those who had intact intertwin membrane.

METHODS

Databases such as PubMed, Web of Science, Scopus, and Embase were systematically searched from inception up to August 2020. The random-effects model was used to pool the mean difference (MD) or odds-ratio (OR) with the corresponding 95% confidence intervals (CIs). Primary outcome was incidence of preterm delivery, and preterm premature rupture of membranes (PPROM), while secondary outcomes included gestational age (GA) at intervention, GA at delivery, neonatal survival, and incidence of pseudoamniotic band syndrome (PABS).

RESULTS

Four studies (1442 patients) met our inclusion criteria. Postoperative identification of IS was associated with earlier GA at delivery (MD = -2.52; 95% CI: -3.22, -1.82; p < 0.00), higher risk of PPROM < 32 weeks (OR = 2.82; 95% CI: 1.80, 4.40; p < 0.001), and preterm delivery < 32 weeks (OR = 4.01; 95% CI: 1.27, 12.63; p = 0.02). No differences were noted in pseudoamniotic band syndrome, at least one or dual neonatal survival rate between IS and non-IS groups.

CONCLUSIONS

Occurrence of IS after laser photocoagulation for TTTS is associated with earlier GA at delivery, increased risk for PPROM and preterm delivery <32 weeks' gestation. However, neonatal survival does not appear to be affected by this complication.

Radiofrequency ablation for selective fetal reduction in complicated Monochorionic twins; comparing the outcomes according to the indications

Background

To evaluate the perinatal outcomes in women with complicated monochorionic diamniotic twins who underwent selective reduction using radiofrequency ablation (RFA).

Methods

This retrospective study included patients with complicated monochorionic diamniotic twins between 16 to 28 weeks who underwent selective reduction using RFA.

Results

During the study period, 143 women with complicated monochorionic twins underwent RFA including 52 with selective fetal growth restriction (sFGR), 48 with twin to twin transfusion syndrome (TTTS), 33 with major fetal anomalies in one of the twins, and 10 with reversed arterial perfusion sequence (TRAP). The overall survival was 71.3% (102/143). The procedures were technically successful in achieving selective termination in all cases. The mean ± SD of gestational age at the time of the procedure was 21.0 ± 2.3 weeks. The mean ± SD of gestational age at delivery was 34.6 ± 3.3 weeks. The mean ± SD of overall procedure-to-delivery time was 12 ± 1.7 weeks. The pregnancy success rates among sFGR, TRAP, TTTS and anomaly groups were 82.7, 80, 73 and 60.7% respectively. There were no maternal complications.

Conclusion

Radiofrequency ablation for fetal reduction in complicated monochorionic twin pregnancies appears to be a reasonable option. The pregnancy success rate following RFA selective reduction was highest among sFGR and TRAP groups and lowest in the anomaly group.

Magnesium sulfate titration reduces maternal complications following fetoscopic closure of spina bifida

OBJECTIVE

To evaluate if magnesium sulfate (MgSO₄ ) titration following fetoscopic spina bifida closure is associated with fewer maternal complications than the Management of Myelomeningocele Study (MOMS) tocolytic regimen.

METHODS

This prospective cohort study included 73 consecutive patients undergoing fetoscopic closure of spina bifida between 2015 and 2020. A policy of using the MgSO₄ regimen per the MOMS trial was changed to a flexible one in which MgSO₄ was titrated according to the frequency of the uterine contractions following surgery. The frequency of maternal pulmonary edema, low maternal oxygen saturation requiring oxygen supplementation, atelectasis, hypocalcemia, and preterm delivery was compared before and after the policy was changed.

RESULTS

A higher proportion of women in the group that used the MOMS MgSO₄ regimen had pulmonary edema compared to those in the flexible one (26.1% [6/23] vs. 6% [3/50]; p = 0.024). Multivariate analysis showed that the MOMS tocolytic regimen was independently associated with a higher risk of pulmonary edema (adjusted odds ratio: 8.57; 95% confidence interval: 1.54-47.7; p = 0.014) than a flexible one. There was no difference in the rate of preterm delivery.

CONCLUSION

Following fetoscopic closure of spina bifida, the MOMS MgSO₄ regimen is associated with an increased risk of pulmonary edema than a more flexible regimen.

Cost-effective fetal lung volumetry for assessment of congenital diaphragmatic hernia

OBJECTIVES

(1) To investigate the reproducibility of total fetal lung volume (TFLV) measurements using a free 3D modeling software (3DSlicer); (2) To correlate these measurements with lung-to-head ratio (LHR) or TFLV measured using PACS and; (3) To determine the role of 3DSlicer in predicting perinatal outcomes in cases with congenital diaphragmatic hernia (CDH) who had fetal tracheal occlusion (FETO).

METHODS

Retrospective cohort study between 2012 and 2017 at Texas Children's Hospital (2011-2017), including all patients who underwent FETO for CDH. LHR was measured by ultrasound and TFLV was measured by MRI at the time of referral and 6 weeks after FETO using 3DSlicer and PACS. We evaluated intra- and inter-rater reliability of TFLV measurement using 3DSlicer, infant survival to 1 year, need for ECMO and pulmonary hypertension.

RESULTS

The intra- and inter-rater reliability of TFLV measured with 3DSlicer was excellent before and after FETO (Intra-class correlation coefficient: 0.98-0.99 and 0.94-0.99, respectively). There was a good correlation between TFLV measured with PACS and with 3DSlicer before and after FETO (r = 0.78 and r = 0.99, respectively). Similarly, there was a good correlation between TFLV measurements using PACS or 3DSlicer and LHR after FETO (r = 0.86 and r = 0.88, respectively). Infants who survived to 1 year had a significantly higher TFLV evaluated with 3DSlicer before FETO compared to non-surviving infants (OR = 1.16[1.1-1.3], p = 0.03) as well as a significantly higher TFLV evaluated by 3DSlicer after FETO (OR = 1.2[1-1.4], p = 0.04).

CONCLUSION

Lung volume measurements using free 3DSlicer in infants with severe CDH who underwent FETO are reproducible and reliable, and have comparable predictive capability for survival as those measured using conventional software.

Maternal serum alpha-fetoprotein level and the relationship to ventriculomegaly in fetal neural tube defect: A retrospective cohort study

OBJECTIVE

To estimate the significance of the association between mid-trimester maternal serum alpha-fetoprotein (MSAFP) level and fetal neuroanatomic findings in cases of open neural tube defect (ONTD).

METHODS

Retrospective study of patients referred for prenatal ONTD repair between 2012 and 2018. Cases were classified into three groups based on their MSAFP level: 1)High MSAFP (>3.8MoM - n = 22), 2)Moderately high MSAFP (≤3.8 and ≥2.5MoM - n = 28), 3)Normal MSAFP (<2.5MoM - n = 18). MRI scans at the time of referral were used to assess the relationship between MSAFP and: A)Type of ONTD; B) Ventriculomegaly; C) Size of the myeloschisis lesion; D) Volume of myelomeningocele; E) Anatomical level of the lesion (LL).

RESULTS

Having a high MSAFP level was more likely to be associated ventriculomegaly at mid-gestation than a moderately high or normal MSAFP level (OR = 8.4;CI95[0.9-73.4];p = 0.05 and OR = 2.8;CI95[0.9-8.8];p = 0.07). There were no differences between the three groups regarding type of lesion, size of the myeloschisis lesion, anatomic LL, or volume of the myelomeningocele sac. Myeloschisis cases with normal MSAFP had a larger surface area when compared to myeloschisis cases with moderately high MSAFP (219.8[104.4-551] vs 155.4[38.5-502.4] mm², p = 0.04).

CONCLUSION

A 2nd trimester MSAFP level >3.8MoM in a fetus with ONTD is associated with mid-gestation ventriculomegaly.

Perinatal characteristics and early childhood follow up after ex-utero intrapartum treatment for head and neck teratomas by prenatal diagnosis

BACKGROUND

Ex utero intrapartum treatment (EXIT) is utilized for safe delivery when a baby has a compromised airway. The purpose of this retrospective study was to examine the indications and outcomes of 11 children presenting with airway occluding oropharyngeal and cervical teratomas.

METHODS

Study of all children with an airway occluding teratoma delivered via EXIT (2001-2018) in our unit. Primary outcomes included survival and tracheostomy at discharge. Data are reported using descriptive statistics as median (range) and rate (%).

RESULTS

We performed 45 EXIT procedure performed between January 2001 and April 2018. Of these, eleven were for cervical and/or upper airway teratoma. Ten (91%) cases had associated polyhydramnios, two (18%) developed nonimmune hydrops, and eight (72%) delivered preterm. Six (45.5%) were performed as an emergency. Estimated blood loss was 1000 ml (500, 1000). The neonatal mortality rate was 18% (2/11) and 33% (3/9) of the survivors were discharged with a tracheostomy.

CONCLUSION

EXIT is a reasonable option for delivery of babies with an occlusive upper airway mass. Neonatal survival depends on individualized factors but may be as high as 82% in those with teratoma.