Publications by authors named "Jimmy Espinoza"

Today, prenatal therapy for congenital diaphragmatic hernia (CDH) primarily centers on fetoscopic endoluminal tracheal occlusion (FETO). This procedure involves the temporary occlusion of the fetal trachea to promote lung development. The TOTAL (Tracheal Occlusion to Accelerate Lung Growth) trial demonstrated a significant improvement in survival rates for fetuses with severe CDH following FETO.

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Large chorioangiomas, benign vascular tumors of the placenta measuring ≥ 4 cm in greatest diameter, may pose significant risks to an ongoing pregnancy and warrant thorough sonographic evaluation to assess for evidence of fetal cardiac compromise and fetal anemia. Significant perinatal morbidity and mortality has been associated with large chorioangiomas. Key sonographic markers indicative of fetal compromise in the setting of a large chorioangioma include 1) polyhydramnios, 2) elevated middle cerebral artery (MCA) PSV (multiples of the median [MoM] ≥ 1.

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Objective: To evaluate changes in fetal lung size/volume and intrapulmonary circulation after serial amnioinfusions (AMI) in fetuses with early anhydramnios.

Methods: Ten fetuses with anhydramnios due to renal agenesis (n = 4) or renal dysplasia (n = 6) were treated with serial AMIs. Before AMI, the following ultrasound parameters were obtained: fetal lung area, total lung volume (TLV), O/E LHR, thorax circumference (TC), cardiothoracic ratio (CTR), and pulsatility index of the main intrapulmonary artery (IPA).

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Introduction: The normal values of the amniotic fluid index (AFI) throughout pregnancy have been established as 5-24 cm. However, a similar AFI may correspond to a different AF volume at different gestational ages. The aim of this study was to calculate the amount of fluid corresponding to each cm of AFI when a known volume of fluid is infused into the uterine cavity.

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Background: Previous studies have shown that hypertonic saline nasal irrigation and gargling reduced the duration of symptoms in upper respiratory infections caused by coronavirus. This study aims to investigate the effects of two saline regimens on symptoms associated with severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2).

Methods: Between 2020 and 2022, individuals aged 18-65 years who tested positive for SARS-CoV-2 infection via polymerase chain reaction (PCR) were randomly assigned to either low- or high-saline regimens for 14 days.

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Article Synopsis
  • The study focused on assessing long-term pediatric outcomes for children with monochorionic diamniotic twins who underwent fetoscopic laser photocoagulation (FLP) for twin-twin transfusion syndrome (TTTS).
  • Researchers utilized a web-based survey through REDCap to collect parent-reported outcomes from families across the U.S. and beyond, targeting patients treated from 2011 to 2019.
  • The study achieved a survey response rate of 37.3% in 2019 and 57.8% in 2020, with high completion rates across various questionnaires designed to evaluate the children's developmental status.
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Background: Hemorrhage associated with placenta accreta spectrum (PAS) is a leading cause of maternal morbidity and mortality. Estimating blood loss in these individuals is a critical component of comprehensive preoperative planning.

Objective: A semiquantitative score based on transvaginal ultrasound was developed and tested to predict PAS, estimate its severity, and blood loss in individuals with clinical and ultrasound evidence suggesting PAS.

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Article Synopsis
  • The Fetal 3D Study aims to create standards for measuring fetal soft tissue and organ volumes using 3D ultrasonography compared to traditional 2D methods, enhancing understanding of fetal growth.
  • The study gathered data from a diverse low-risk cohort of 1,730 fetuses across 12 U.S. sites, collecting up to five scans per fetus to analyze various anatomical measurements, including subcutaneous tissue thickness and organ volumes.
  • Results indicate that abdominal subcutaneous tissue thickness increases linearly throughout pregnancy, while limb volume growth displays a quadratic pattern with periods of acceleration, suggesting a more complex growth trajectory than previously recognized.
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Background: Angiogenic imbalances, characterized by an excess of antiangiogenic factors (soluble fms-like tyrosine kinase 1) and reduced angiogenic factors (vascular endothelial growth factor and placental growth factor), contribute to the mechanisms of disease in preeclampsia. The ratio of soluble fms-like tyrosine kinase 1 to placental growth factor has been used as a biomarker for preeclampsia, but the cutoff values may vary with gestational age and assay platform.

Objective: This study aimed to compare multiples of the median of the maternal plasma soluble fms-like tyrosine kinase 1 to placental growth factor ratio, soluble fms-like tyrosine kinase 1, placental growth factor, and conventional clinical and laboratory values in their ability to predict preeclampsia with severe features.

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Background: Most patients with signs or symptoms (s/s) of suspected preeclampsia are not diagnosed with preeclampsia. We sought to determine and compare the prevalence of s/s, pregnancy outcomes, and costs between patients with and without diagnosed preeclampsia.

Methods: This retrospective cohort study analyzed a large insurance research database.

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Introduction: The objective of this study was to evaluate the association between fetal cardiac deformation analysis (CDA) and cardiac function with severe adverse perinatal outcomes in fetuses with isolated left congenital diaphragmatic hernia (CDH).

Methods: CDA in each ventricle (contractility, size, and shape), evaluated by speckle tracking and novel FetalHQ software, and markers of cardiac function (E/A ratios, pulmonary and aortic peak systolic velocities, and sigmoid annular valve diameters), were evaluated in fetuses with isolated left CDH. Two evaluations were performed: at referral (CDA and function) and within 3 weeks of delivery (CDA).

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There's a paucity of robust normal fractional limb and organ volume standards from a large and diverse ethnic population. The Fetal 3D Study was designed to develop research and clinical applications for fetal soft tissue and organ volume assessment. The NICHD Fetal Growth Studies (2009-2013) collected 2D and 3D fetal volumes.

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Objective: We aimed to evaluate whether there is a significant association between a placental pathology diagnosis basal plate myofibers (BPMF) in an index pregnancy with placenta accreta spectrum (PAS) in the subsequent pregnancy.

Study Design: We conducted a retrospective nested cohort study of all cases with a histopathological finding of BPMF between August 2012 and March 2020 at a single tertiary referral center. Data were collected for all subjects (cases and controls) with at least two consecutive pregnancies (the initial index pregnancy and at least one subsequent pregnancy) accompanied by a concomitant record of histopathological study of the placenta at our center.

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Article Synopsis
  • The study investigated how changes in fetal lung volume after fetoscopic endoluminal tracheal occlusion (FETO) impact survival rates and the necessity of ECMO for infants with congenital diaphragmatic hernia (CDH).
  • MRI metrics were used to assess lung volume and liver herniation, with results showing that a post-FETO increase in total lung volume of less than 10% was a significant predictor for lower survival rates and higher ECMO use.
  • It was concluded that fetuses experiencing less than a 10% increase in lung volume post-FETO face a higher risk of complications, including death and reliance on ECMO, when considering factors like gestational age and CDH severity.
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Objective: We evaluate survival of fetuses with severe Lower Urinary Tract Obstruction (LUTO) based on bladder morphology. We hypothesize that fetuses with a "floppy" appearing bladder on initial prenatal ultrasound will have worse infant outcomes than fetuses with full/rounded bladders.

Method: We retrospectively reviewed all cases of LUTO evaluated in our fetal center between January 2013 and December 2021.

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Article Synopsis
  • In utero repair of open neural tube defects can be performed through two main approaches: open hysterotomy, which has shown better motor outcomes, and laparotomy-assisted fetoscopic repair, which may have fewer complications.
  • This study evaluated the maternal and fetal complications of both surgical methods over a period from 2011 to 2021, using a classification system to rate the severity of complications.
  • Results indicated that the hybrid approach generally had a higher gestational age at surgery, a lower maternal BMI, and longer surgical duration, but it also resulted in fewer severe complications compared to the open approach.
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Objective: In fetuses with severe congenital diaphragmatic hernia, fetal endoluminal tracheal occlusion (FETO) with balloon increases survival and reduces morbidity. Balloon removal is often scheduled electively. In urgent cases, in-utero removal is impossible and removal immediately after delivery has to occur, posing risk of death from airway obstruction.

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  • The study aimed to evaluate the outcomes of twin-twin transfusion syndrome (TTTS) based on the middle cerebral artery pulsatility index (MCA-PI) before fetoscopic laser photocoagulation (FLPC) surgery.
  • A retrospective analysis of monochorionic twins affected by TTTS revealed that abnormal MCA-PI was present in 17.7% of cases, which was linked to higher rates of severe fetal growth restriction (sFGR) and decreased survival rates for the donor twin within 48 hours after surgery.
  • Findings suggest that an abnormal MCA-PI is associated with significantly lower survival rates for the donor twin at delivery and 30 days post-birth, indicating its potential importance in assessing prognosis in TTTS
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Objective: To compare the outcomes of dichorionic triamniotic (DCTA) triplets with that of monochorionic diamniotic (MCDA) twin gestations undergoing fetoscopic laser surgery (FLS) for treatment of twin-to-twin transfusion syndrome (TTTS).

Methods: Retrospective cohort study of prospectively collected data of consecutive DCTA triplet and MCDA twin pregnancies with TTTS that underwent FLS at two fetal treatment centers between 2012 and 2020. Preoperative, operative and, postoperative variables were collected.

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