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8 results on '"Chiung-Hui Wu"'

1. Fetal Aortic Blood Flow Velocity and Power Doppler Profiles in the First Trimester: A Comprehensive Study Using High-Definition Flow Imaging

Author

Yi-Cheng Wu, Ching-Hsuan Chen, Hsin-Tzu Lu, Yu-Li Lee, Pi-Yu Chen, Ting-Yu Wu, Ming-Hsun Tien, Chiung-Hui Wu, Jack Yu-Jen Huang, Ching-Hua Hsiao, and Woei-Chyn Chu

Subjects
power Doppler ultrasound, aortic isthmus, high-definition flow imaging (HDFI), isthmic flow index, isthmic systolic index, first-trimester screening, Technology, Biology (General), QH301-705.5
Abstract

Objectives: This study aimed to establish reference values for fetal aortic isthmus blood flow velocity and associated indices during the first trimester, utilizing a novel ultrasonographic technique known as high-definition flow imaging (HDFI). Additionally, the correlation between Doppler profiles of aortic blood flow and key fetal parameters, including nuchal thickness (NT), crown-rump length (CRL), and fetal heartbeat (FHB), was investigated. Methods: A total of 262 fetuses were included in the analysis between December 2022 and December 2023. Utilizing 2D power Doppler ultrasound images, aortic blood flow parameters were assessed, including aortic peak systolic velocity (PS), aortic end-diastolic velocity (ED), aortic time average maximal velocity (TAMV), and various indices such as aortic systolic velocity/diastolic velocity (S/D), aortic pulsatile index (PI), aortic resistance index (RI), aortic isthmus flow velocity index (IFI), and aortic isthmic systolic index (ISI). Concurrently, fetal FHB, NT, and CRL were evaluated during early trimester Down syndrome screening. Results: Significant findings include a positive correlation between gestational age (GA) and PS (PS = 3.75 × (GA) − 15.4, r2 = 0.13, p < 0.01), ED (ED = 0.42 × (GA) − 0.61, r2 = 0.04, p < 0.01), PI (PI = 0.07 × (GA) + 1.03, r2 = 0.04, p < 0.01), and TAMV (TAMV = 1.23 × (GA) − 1.66, r2 = 0.08, p < 0.01). In contrast, aortic ISI demonstrated a significant decrease (ISI = −0.03 × (GA) + 0.57, r2 = 0.05, p < 0.05) with gestational age. No significant correlation was observed for aortic RI (p = 0.33), S/D (p = 0.39), and IFI (p = 0.29) with gestational age. Aortic PS exhibited positive correlations with NT (0.217, p = 0.001) and CRL (0.360, p = 0.000) but a negative correlation with FHB (−0.214, p = 0.001). Aortic PI demonstrated positive correlations with CRL (0.208, p = 0.001) and negative correlations with FHB (−0.176, p = 0.005). Aortic TAMV showed positive correlations with NT (0.233, p = 0.000) and CRL (0.290, p = 0.000) while exhibiting a negative correlation with FHB (−0.141, p = 0.026). Aortic ISI demonstrated negative correlations with NT (−0.128, p = 0.045) and CRL (−0.218, p = 0.001) but a positive correlation with FHB (0.163, p = 0.010). Conclusions: Power Doppler angiography with Doppler ultrasound demonstrates the ability to establish accurate reference values for fetal aortic blood flow during the first trimester of pregnancy. Notably, aortic PS, TAMV, and ISI exhibit significant correlations with NT, CRL, and FHB, with ISI appearing more relevant than IFI, PS, TAMV, and FHB. The utilization of HDFI technology proves advantageous in efficiently detecting the site of the aortic isthmus compared to traditional color Doppler mode in early second trimesters.

Published
2024
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2. Formation and Electrochemical Property of Pyrrole-Terminated SAMs and the Effect of the SAMs on the Physicochemical Properties of Polypyrrole Films Electrochemically Deposited over Them

Author

Chun Guey Wu, Chiung Hui Wu, and Sheng Chang Chiang

Subjects
chemistry.chemical_classification, Inorganic chemistry, Surfaces and Interfaces, Condensed Matter Physics, Electrochemistry, Polypyrrole, chemistry.chemical_compound, chemistry, Chemical engineering, Monolayer, lipids (amino acids, peptides, and proteins), General Materials Science, Spectroscopy, Deposition (law), Alkyl, Pyrrole
Abstract

ω-(N-Pyrrolyl) alkanethiols with various alkyl chain lengths were prepared to study the formation of self-assembled monolayers (SAMs) bearing a bulky headgroup and the electrochemical deposition of...

Published
2002

3. Prediction of dystocia-related cesarean section risk in uncomplicated Taiwanese nulliparas at term

Author

Chi-Chen Chien, Chiu-Fen Chen, and Chiung-Hui Wu

Subjects
Adult, Pediatrics, medicine.medical_specialty, Term Birth, Taiwan, Body Mass Index, Young Adult, Pregnancy, Risk Factors, medicine, Humans, reproductive and urinary physiology, Retrospective Studies, business.industry, Cesarean Section, Obstetrics and Gynecology, Retrospective cohort study, General Medicine, medicine.disease, Dystocia, female genital diseases and pregnancy complications, Term (time), body regions, Parity, Female, business, Maternal Age
Abstract

We aimed to assess risk factors for dystocia-related cesarean section (CS) in uncomplicated Taiwanese nulliparas at termWe reviewed 1,272 deliveries by 1 obstetrician in a Taiwanese hospital between February 2004 and December 2011. These parturients were nulliparas with singleton pregnancies ≥ 37 weeks gestation who had liveborn cephalic deliveries. The CS group consisted of parturients with dystocia-related CS for the following indications: prolonged latent phase, failure to progress, or arrest of descent. Eight confounding variables [maternal age, height, weight, body mass index (BMI) in labor, gestational age, infant birth weight, gender, and cervical dilatation] were obtained from the medical records. Multivariate logistic regression analysis was used to determine the association between each variable and route of delivery. A predictive formula for CS probability was generated using a logistic regression model.Overall 15.0 % of nulliparas in our population underwent CS. Logistic regression analysis revealed a significant association between maternal BMI and CS (adjusted OR 1.112; 95 % CI 1.065-1.161; P0.001). The association between maternal age and CS was also statistically significant (adjusted OR 1.074, 95 % CI 1.033-1.116, P = 0.001). Maternal height, weight in labor, gestational age, infant birth weight, gender, and cervical dilatation were not significantly associated with the route of delivery. A predictive formula for CS probability was developed based on a combination of maternal BMI and age.Our results show that maternal age and BMI in labor are significantly associated with dystocia-related CS in uncomplicated Taiwanese nulliparas at term. We develop a practical formula to predict the probability for CS. Using this formula, obstetricians can estimate the risk of CS according to maternal age and BMI in labor.

Published
2012

5. Xanthogranulomatous Inflammation of the Uterus

Author

Chi-Chen Chien, Chiung-Hui Wu, and Hsiao-Bai Yang

Subjects
Adult, Uterine Diseases, medicine.medical_specialty, Granuloma, business.industry, Uterine fundus, Ultrasound, Uterus, Combined oral contraceptives, Obstetrics and Gynecology, medicine.anatomical_structure, Text mining, Homogeneous, Xanthomatosis, medicine, Humans, Female, Radiology, Leukocytosis, Xanthogranulomatous inflammation, medicine.symptom, business
Abstract

On ultrasound assessment, a non-specific 17 11 mm mass was seen in the uterine fundus. The patient’s bleeding pattern improved after one cycle of combined oral contraceptives, but recurred 11 months later. Repeat ultrasound showed an enlarged homogeneous mass in the uterine wall measuring 36 33 mm (Figure 1). The patient was hemodynamically stable with mild leukocytosis (10.9 109/L with 90.6% neutrophils).

Published
2009

7. New solid polymer electrolytes based on PEO/PAN hybrids

Author

Chun‐Guey, Wu, Chiung‐Hui, Wu, Ming‐I, Lu, and Huey‐Jan, Chuang

Abstract

Hybrid polymer dry electrolytes comprised of poly(ethylene oxide) (PEO), polyacrylonitrile (PAN), and LiClO4 were investigated. The impedance spectroscopy showed that the effect of PAN on the ion conductivity of PEO‐based electrolytes depends on the concentration of lithium salt. When the mole ratio of lithium to oxygen is 0.062 (15%LiClO4‐PEO), adding PAN will increase the ionic conductivity. Differential scanning calorimetry, NMR, and IR data suggested that the enhanced conductivity was due to both the decreasing of the PEO crystallinity and increasing of the degree of ionization of lithium salt. There was obviously no interaction between PAN and lithium ions, and PAN acts as a reinforcing filler, and hence contributes to the mechanical strength besides reducing the crystallinity of the polymer electrolytes. When the LiClO4‐PEO‐PAN hybrid polymer electrolyte was heated at 200°C under N2, PAN crosslinked partially, which further decreased the crystallinity of PEO and increased the ionic conductivity, and at the same time prevented the recrystallization of PEO upon sitting at ambient environment. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 1530–1540, 2006

Published
2006
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8. Meconium Peritonitis Presenting as a Solitary Calcified Mass on Ultrasound at Mid-trimester and Identified with Fetal Magnetic Resonance Imaging

Author

Chiung-Hui Wu, Farn Lu, and Tsung-Hsan Huang

Subjects
medicine.medical_specialty, Polyhydramnios, Pathology, congenital, hereditary, and neonatal diseases and abnormalities, Perforation (oil well), Prenatal diagnosis, fetal disease, fluids and secretions, Ascites, medicine, intrauterine diagnosis, magnetic resonance imaging, Radiology, Nuclear Medicine and imaging, reproductive and urinary physiology, medicine.diagnostic_test, business.industry, Meconium peritonitis, Magnetic resonance imaging, medicine.disease, medicine.anatomical_structure, Fetal disease, Radiology Nuclear Medicine and imaging, embryonic structures, Abdomen, Radiology, medicine.symptom, business
Abstract

Meconium peritonitis usually results from perforation of the intestine occurring in utero or shortly after birth. The common features of meconium peritonitis on prenatal ultrasonography are a solitary calcified mass or disseminated intraperitoneal calcifications, ascites, pseudocyst, and occasionally polyhydramnios and fetal hydrops. We report a case where prenatal ultrasound revealed a calcified mass in the right upper quadrant of the abdomen. Subsequent magnetic resonance imaging (MRI) suggested simple meconium peritonitis. Fetal MRI is considered to be reliable for demonstrating meconium peritonitis. Prenatal diagnosis of meconium peritonitis and identification of associated malformations facilitate planning of delivery, earlier surgical counseling, and better neonatal outcome.

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